1dnl 2dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST) 3dnl 4dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the 5dnl end of configure. This lets tested variables be reassigned, and the 6dnl conditional will depend on the final state of the variable. For a simple 7dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED. 8dnl 9m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl 10AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl 11 m4_divert_text([glibcxx_diversion],dnl 12 AM_CONDITIONAL([$1],[$2]) 13 )dnl 14])dnl 15AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl 16 17 18dnl 19dnl Check to see what architecture and operating system we are compiling 20dnl for. Also, if architecture- or OS-specific flags are required for 21dnl compilation, pick them up here. 22dnl 23AC_DEFUN([GLIBCXX_CHECK_HOST], [ 24 . $glibcxx_srcdir/configure.host 25 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir]) 26 AC_MSG_NOTICE([OS config directory is $os_include_dir]) 27]) 28 29dnl 30dnl Initialize the rest of the library configury. At this point we have 31dnl variables like $host. 32dnl 33dnl Sets: 34dnl SUBDIRS 35dnl Substs: 36dnl glibcxx_builddir (absolute path) 37dnl glibcxx_srcdir (absolute path) 38dnl toplevel_builddir (absolute path) 39dnl toplevel_srcdir (absolute path) 40dnl with_cross_host 41dnl with_newlib 42dnl with_target_subdir 43dnl plus 44dnl - the variables in GLIBCXX_CHECK_HOST / configure.host 45dnl - default settings for all AM_CONFITIONAL test variables 46dnl - lots of tools, like CC and CXX 47dnl 48AC_DEFUN([GLIBCXX_CONFIGURE], [ 49 # Keep these sync'd with the list in Makefile.am. The first provides an 50 # expandable list at autoconf time; the second provides an expandable list 51 # (i.e., shell variable) at configure time. 52 m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/c++17 src/c++20 src/filesystem doc po testsuite python]) 53 SUBDIRS='glibcxx_SUBDIRS' 54 55 # These need to be absolute paths, yet at the same time need to 56 # canonicalize only relative paths, because then amd will not unmount 57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd. 58 glibcxx_builddir=`${PWDCMD-pwd}` 59 case $srcdir in 60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;; 61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;; 62 esac 63 toplevel_builddir=${glibcxx_builddir}/.. 64 toplevel_srcdir=${glibcxx_srcdir}/.. 65 AC_SUBST(glibcxx_builddir) 66 AC_SUBST(glibcxx_srcdir) 67 AC_SUBST(toplevel_builddir) 68 AC_SUBST(toplevel_srcdir) 69 70 # We use these options to decide which functions to include. They are 71 # set from the top level. 72 AC_ARG_WITH([target-subdir], 73 AC_HELP_STRING([--with-target-subdir=SUBDIR], 74 [configuring in a subdirectory])) 75 76 AC_ARG_WITH([cross-host], 77 AC_HELP_STRING([--with-cross-host=HOST], 78 [configuring with a cross compiler])) 79 80 AC_ARG_WITH([newlib], 81 AC_HELP_STRING([--with-newlib], 82 [assume newlib as a system C library])) 83 84 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't 85 # available). Uncomment the next line to force a particular method. 86 AC_PROG_LN_S 87 #LN_S='cp -p' 88 89 AC_CHECK_TOOL(AS, as) 90 AC_CHECK_TOOL(AR, ar) 91 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) 92 93 AM_MAINTAINER_MODE 94 95 # Set up safe default values for all subsequent AM_CONDITIONAL tests 96 # which are themselves conditionally expanded. 97 ## (Right now, this only matters for enable_wchar_t, but nothing prevents 98 ## other macros from doing the same. This should be automated.) -pme 99 100 # Check for C library flavor since GNU/Linux platforms use different 101 # configuration directories depending on the C library in use. 102 AC_EGREP_CPP([_using_uclibc], [ 103 #include <stdio.h> 104 #if __UCLIBC__ 105 _using_uclibc 106 #endif 107 ], uclibc=yes, uclibc=no) 108 109 AC_EGREP_CPP([_using_bionic], [ 110 #include <stdio.h> 111 #if __BIONIC__ 112 _using_bionic 113 #endif 114 ], bionic=yes, bionic=no) 115 116 # Find platform-specific directories containing configuration info. 117 # Also possibly modify flags used elsewhere, as needed by the platform. 118 GLIBCXX_CHECK_HOST 119]) 120 121 122dnl 123dnl Tests for newer compiler features, or features that are present in newer 124dnl compiler versions but not older compiler versions still in use, should 125dnl be placed here. 126dnl 127dnl Defines: 128dnl WERROR='-Werror' if requested and possible; g++'s that lack the 129dnl new inlining code or the new system_header pragma will die on -Werror. 130dnl Leave it out by default and use maint-mode to use it. 131dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if 132dnl compiler supports it and the user has not requested debug mode. 133dnl 134AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [ 135 # All these tests are for C++; save the language and the compiler flags. 136 # The CXXFLAGS thing is suspicious, but based on similar bits previously 137 # found in GLIBCXX_CONFIGURE. 138 AC_LANG_SAVE 139 AC_LANG_CPLUSPLUS 140 ac_test_CXXFLAGS="${CXXFLAGS+set}" 141 ac_save_CXXFLAGS="$CXXFLAGS" 142 143 # Check for -ffunction-sections -fdata-sections 144 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections]) 145 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections' 146 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no]) 147 if test "$ac_test_CXXFLAGS" = set; then 148 CXXFLAGS="$ac_save_CXXFLAGS" 149 else 150 # this is the suspicious part 151 CXXFLAGS='' 152 fi 153 if test x"$ac_fdsections" = x"yes"; then 154 SECTION_FLAGS='-ffunction-sections -fdata-sections' 155 fi 156 AC_MSG_RESULT($ac_fdsections) 157 158 AC_LANG_RESTORE 159 AC_SUBST(SECTION_FLAGS) 160]) 161 162 163dnl 164dnl If GNU ld is in use, check to see if tricky linker opts can be used. If 165dnl the native linker is in use, all variables will be defined to something 166dnl safe (like an empty string). 167dnl 168dnl Defines: 169dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible 170dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible 171dnl LD (as a side effect of testing) 172dnl Sets: 173dnl with_gnu_ld 174dnl glibcxx_ld_is_gold (set to "no" or "yes") 175dnl glibcxx_gnu_ld_version (possibly) 176dnl 177dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will 178dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems. 179dnl 180AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [ 181 # If we're not using GNU ld, then there's no point in even trying these 182 # tests. Check for that first. We should have already tested for gld 183 # by now (in libtool), but require it now just to be safe... 184 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS='' 185 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS='' 186 AC_REQUIRE([AC_PROG_LD]) 187 AC_REQUIRE([AC_PROG_AWK]) 188 189 # The name set by libtool depends on the version of libtool. Shame on us 190 # for depending on an impl detail, but c'est la vie. Older versions used 191 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on 192 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually 193 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't 194 # set (hence we're using an older libtool), then set it. 195 if test x${with_gnu_ld+set} != xset; then 196 if test x${ac_cv_prog_gnu_ld+set} != xset; then 197 # We got through "ac_require(ac_prog_ld)" and still not set? Huh? 198 with_gnu_ld=no 199 else 200 with_gnu_ld=$ac_cv_prog_gnu_ld 201 fi 202 fi 203 204 # Start by getting the version number. I think the libtool test already 205 # does some of this, but throws away the result. 206 glibcxx_ld_is_gold=no 207 if test x"$with_gnu_ld" = x"yes"; then 208 AC_MSG_CHECKING([for ld version]) 209 changequote(,) 210 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then 211 glibcxx_ld_is_gold=yes 212 fi 213 ldver=`$LD --version 2>/dev/null | 214 sed -e 's/[. ][0-9]\{8\}$//;s/.* \([^ ]\{1,\}\)$/\1/; q'` 215 changequote([,]) 216 glibcxx_gnu_ld_version=`echo $ldver | \ 217 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'` 218 AC_MSG_RESULT($glibcxx_gnu_ld_version) 219 fi 220 221 # Set --gc-sections. 222 glibcxx_have_gc_sections=no 223 if test "$glibcxx_ld_is_gold" = "yes"; then 224 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then 225 glibcxx_have_gc_sections=yes 226 fi 227 else 228 glibcxx_gcsections_min_ld=21602 229 if test x"$with_gnu_ld" = x"yes" && 230 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then 231 glibcxx_have_gc_sections=yes 232 fi 233 fi 234 if test "$glibcxx_have_gc_sections" = "yes"; then 235 # Sufficiently young GNU ld it is! Joy and bunny rabbits! 236 # NB: This flag only works reliably after 2.16.1. Configure tests 237 # for this are difficult, so hard wire a value that should work. 238 239 ac_test_CFLAGS="${CFLAGS+set}" 240 ac_save_CFLAGS="$CFLAGS" 241 CFLAGS='-Wl,--gc-sections' 242 243 # Check for -Wl,--gc-sections 244 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections]) 245 AC_TRY_LINK([ int one(void) { return 1; } 246 int two(void) { return 2; } 247 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no]) 248 if test "$ac_gcsections" = "yes"; then 249 rm -f conftest.c 250 touch conftest.c 251 if $CC -c conftest.c; then 252 if $LD --gc-sections -o conftest conftest.o 2>&1 | \ 253 grep "Warning: gc-sections option ignored" > /dev/null; then 254 ac_gcsections=no 255 fi 256 fi 257 rm -f conftest.c conftest.o conftest 258 fi 259 if test "$ac_gcsections" = "yes"; then 260 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS" 261 fi 262 AC_MSG_RESULT($ac_gcsections) 263 264 if test "$ac_test_CFLAGS" = set; then 265 CFLAGS="$ac_save_CFLAGS" 266 else 267 # this is the suspicious part 268 CFLAGS='' 269 fi 270 fi 271 272 # Set -z,relro. 273 # Note this is only for shared objects. 274 ac_ld_relro=no 275 if test x"$with_gnu_ld" = x"yes"; then 276 # cygwin and mingw uses PE, which has no ELF relro support, 277 # multi target ld may confuse configure machinery 278 case "$host" in 279 *-*-cygwin*) 280 ;; 281 *-*-mingw*) 282 ;; 283 *) 284 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro]) 285 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"` 286 if test -n "$cxx_z_relo"; then 287 OPT_LDFLAGS="-Wl,-z,relro" 288 ac_ld_relro=yes 289 fi 290 AC_MSG_RESULT($ac_ld_relro) 291 esac 292 fi 293 294 # Set linker optimization flags. 295 if test x"$with_gnu_ld" = x"yes"; then 296 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS" 297 fi 298 299 AC_SUBST(SECTION_LDFLAGS) 300 AC_SUBST(OPT_LDFLAGS) 301]) 302 303 304dnl 305dnl Check for headers for, and arguments to, the setrlimit() function. 306dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE. 307dnl 308dnl Defines: 309dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits 310dnl various HAVE_LIMIT_* for individual limit names 311dnl 312AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [ 313 AC_MSG_CHECKING([for RLIMIT_$1]) 314 AC_TRY_COMPILE( 315 [#include <unistd.h> 316 #include <sys/time.h> 317 #include <sys/resource.h> 318 ], 319 [ int f = RLIMIT_$1 ; ], 320 [glibcxx_mresult=1], [glibcxx_mresult=0]) 321 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult, 322 [Only used in build directory testsuite_hooks.h.]) 323 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi 324 AC_MSG_RESULT($res) 325]) 326 327AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [ 328 AC_LANG_SAVE 329 AC_LANG_CPLUSPLUS 330 setrlimit_have_headers=yes 331 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h, 332 [], 333 [setrlimit_have_headers=no]) 334 # If don't have the headers, then we can't run the tests now, and we 335 # won't be seeing any of these during testsuite compilation. 336 if test $setrlimit_have_headers = yes; then 337 # Can't do these in a loop, else the resulting syntax is wrong. 338 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA) 339 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS) 340 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM) 341 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS) 342 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE) 343 344 # Check for rlimit, setrlimit. 345 AC_CACHE_VAL(glibcxx_cv_setrlimit, [ 346 AC_TRY_COMPILE( 347 [#include <unistd.h> 348 #include <sys/time.h> 349 #include <sys/resource.h> 350 ], 351 [struct rlimit r; 352 setrlimit(0, &r);], 353 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no]) 354 ]) 355 fi 356 357 AC_MSG_CHECKING([for testsuite resource limits support]) 358 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then 359 ac_res_limits=yes 360 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1, 361 [Define if using setrlimit to set resource limits during 362 "make check"]) 363 else 364 ac_res_limits=no 365 fi 366 AC_LANG_RESTORE 367 AC_MSG_RESULT($ac_res_limits) 368]) 369 370 371dnl 372dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>. 373dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately. 374dnl 375AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [ 376 377 AC_LANG_SAVE 378 AC_LANG_CPLUSPLUS 379 ac_save_CXXFLAGS="$CXXFLAGS" 380 CXXFLAGS="$CXXFLAGS -fno-exceptions" 381 382 AC_MSG_CHECKING([for S_ISREG or S_IFREG]) 383 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [ 384 GCC_TRY_COMPILE_OR_LINK( 385 [#include <sys/stat.h>], 386 [struct stat buffer; 387 fstat(0, &buffer); 388 S_ISREG(buffer.st_mode);], 389 [glibcxx_cv_S_ISREG=yes], 390 [glibcxx_cv_S_ISREG=no]) 391 ]) 392 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [ 393 GCC_TRY_COMPILE_OR_LINK( 394 [#include <sys/stat.h>], 395 [struct stat buffer; 396 fstat(0, &buffer); 397 S_IFREG & buffer.st_mode;], 398 [glibcxx_cv_S_IFREG=yes], 399 [glibcxx_cv_S_IFREG=no]) 400 ]) 401 res=no 402 if test $glibcxx_cv_S_ISREG = yes; then 403 AC_DEFINE(HAVE_S_ISREG, 1, 404 [Define if S_ISREG is available in <sys/stat.h>.]) 405 res=S_ISREG 406 elif test $glibcxx_cv_S_IFREG = yes; then 407 AC_DEFINE(HAVE_S_IFREG, 1, 408 [Define if S_IFREG is available in <sys/stat.h>.]) 409 res=S_IFREG 410 fi 411 AC_MSG_RESULT($res) 412 413 CXXFLAGS="$ac_save_CXXFLAGS" 414 AC_LANG_RESTORE 415]) 416 417 418dnl 419dnl Check whether poll is available in <poll.h>, and define HAVE_POLL. 420dnl 421AC_DEFUN([GLIBCXX_CHECK_POLL], [ 422 423 AC_LANG_SAVE 424 AC_LANG_CPLUSPLUS 425 ac_save_CXXFLAGS="$CXXFLAGS" 426 CXXFLAGS="$CXXFLAGS -fno-exceptions" 427 428 AC_MSG_CHECKING([for poll]) 429 AC_CACHE_VAL(glibcxx_cv_POLL, [ 430 GCC_TRY_COMPILE_OR_LINK( 431 [#include <poll.h>], 432 [struct pollfd pfd[1]; 433 pfd[0].events = POLLIN; 434 poll(pfd, 1, 0);], 435 [glibcxx_cv_POLL=yes], 436 [glibcxx_cv_POLL=no]) 437 ]) 438 if test $glibcxx_cv_POLL = yes; then 439 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.]) 440 fi 441 AC_MSG_RESULT($glibcxx_cv_POLL) 442 443 CXXFLAGS="$ac_save_CXXFLAGS" 444 AC_LANG_RESTORE 445]) 446 447 448dnl 449dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV. 450dnl 451AC_DEFUN([GLIBCXX_CHECK_WRITEV], [ 452 453 AC_LANG_SAVE 454 AC_LANG_CPLUSPLUS 455 ac_save_CXXFLAGS="$CXXFLAGS" 456 CXXFLAGS="$CXXFLAGS -fno-exceptions" 457 458 AC_MSG_CHECKING([for writev]) 459 AC_CACHE_VAL(glibcxx_cv_WRITEV, [ 460 GCC_TRY_COMPILE_OR_LINK( 461 [#include <sys/uio.h>], 462 [struct iovec iov[2]; 463 writev(0, iov, 0);], 464 [glibcxx_cv_WRITEV=yes], 465 [glibcxx_cv_WRITEV=no]) 466 ]) 467 if test $glibcxx_cv_WRITEV = yes; then 468 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.]) 469 fi 470 AC_MSG_RESULT($glibcxx_cv_WRITEV) 471 472 CXXFLAGS="$ac_save_CXXFLAGS" 473 AC_LANG_RESTORE 474]) 475 476 477dnl 478dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T. 479dnl Also check whether int64_t is actually a typedef to long or long long. 480dnl 481AC_DEFUN([GLIBCXX_CHECK_INT64_T], [ 482 483 AC_LANG_SAVE 484 AC_LANG_CPLUSPLUS 485 486 AC_MSG_CHECKING([for int64_t]) 487 AC_CACHE_VAL(glibcxx_cv_INT64_T, [ 488 AC_TRY_COMPILE( 489 [#include <stdint.h>], 490 [int64_t var;], 491 [glibcxx_cv_INT64_T=yes], 492 [glibcxx_cv_INT64_T=no]) 493 ]) 494 495 if test $glibcxx_cv_INT64_T = yes; then 496 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.]) 497 AC_MSG_RESULT($glibcxx_cv_INT64_T) 498 499 AC_MSG_CHECKING([for int64_t as long]) 500 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [ 501 AC_TRY_COMPILE( 502 [#include <stdint.h> 503 template<typename, typename> struct same { enum { value = -1 }; }; 504 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; }; 505 int array[same<int64_t, long>::value];], [], 506 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no]) 507 ]) 508 509 if test $glibcxx_cv_int64_t_long = yes; then 510 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.]) 511 AC_MSG_RESULT($glibcxx_cv_int64_t_long) 512 fi 513 514 AC_MSG_CHECKING([for int64_t as long long]) 515 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [ 516 AC_TRY_COMPILE( 517 [#include <stdint.h> 518 template<typename, typename> struct same { enum { value = -1 }; }; 519 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; }; 520 int array[same<int64_t, long long>::value];], [], 521 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no]) 522 ]) 523 524 if test $glibcxx_cv_int64_t_long_long = yes; then 525 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.]) 526 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long) 527 fi 528 fi 529 530 AC_LANG_RESTORE 531]) 532 533 534dnl 535dnl Check whether LFS support is available. 536dnl 537AC_DEFUN([GLIBCXX_CHECK_LFS], [ 538 AC_LANG_SAVE 539 AC_LANG_CPLUSPLUS 540 ac_save_CXXFLAGS="$CXXFLAGS" 541 CXXFLAGS="$CXXFLAGS -fno-exceptions" 542 AC_MSG_CHECKING([for LFS support]) 543 AC_CACHE_VAL(glibcxx_cv_LFS, [ 544 GCC_TRY_COMPILE_OR_LINK( 545 [#include <unistd.h> 546 #include <stdio.h> 547 #include <sys/stat.h> 548 ], 549 [FILE* fp; 550 fopen64("t", "w"); 551 fseeko64(fp, 0, SEEK_CUR); 552 ftello64(fp); 553 lseek64(1, 0, SEEK_CUR); 554 struct stat64 buf; 555 fstat64(1, &buf);], 556 [glibcxx_cv_LFS=yes], 557 [glibcxx_cv_LFS=no]) 558 ]) 559 if test $glibcxx_cv_LFS = yes; then 560 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.]) 561 fi 562 AC_MSG_RESULT($glibcxx_cv_LFS) 563 CXXFLAGS="$ac_save_CXXFLAGS" 564 AC_LANG_RESTORE 565]) 566 567 568dnl 569dnl Check for whether a fully dynamic basic_string implementation should 570dnl be turned on, that does not put empty objects in per-process static 571dnl memory (mostly useful together with shared memory allocators, see PR 572dnl libstdc++/16612 for details). 573dnl 574dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1 575dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0 576dnl otherwise undefined 577dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)] 578dnl Where DEFAULT is either `yes' or `no'. 579dnl 580AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [ 581 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory]) 582 if test $enable_fully_dynamic_string = yes; then 583 enable_fully_dynamic_string_def=1 584 else 585 enable_fully_dynamic_string_def=0 586 fi 587 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}], 588 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults]) 589]) 590 591 592dnl 593dnl Does any necessary configuration of the testsuite directory. Generates 594dnl the testsuite_hooks.h header. 595dnl 596dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this. 597dnl 598dnl Sets: 599dnl enable_abi_check 600dnl GLIBCXX_TEST_WCHAR_T 601dnl GLIBCXX_TEST_THREAD 602dnl Substs: 603dnl baseline_dir 604dnl baseline_subdir_switch 605dnl 606AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [ 607 # Do checks for resource limit functions. 608 GLIBCXX_CHECK_SETRLIMIT 609 610 if $GLIBCXX_IS_NATIVE ; then 611 # Look for setenv, so that extended locale tests can be performed. 612 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv) 613 fi 614 615 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes && 616 test $enable_symvers != no; then 617 case "$host" in 618 *-*-cygwin*) 619 enable_abi_check=no ;; 620 *) 621 enable_abi_check=yes ;; 622 esac 623 else 624 # Only build this as native, since automake does not understand 625 # CXX_FOR_BUILD. 626 enable_abi_check=no 627 fi 628 629 # Export file names for ABI checking. 630 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}" 631 AC_SUBST(baseline_dir) 632 baseline_subdir_switch="$abi_baseline_subdir_switch" 633 AC_SUBST(baseline_subdir_switch) 634]) 635 636 637dnl 638dnl Does any necessary configuration for docbook in the docs directory. 639dnl 640dnl XSLTPROC must be set before this 641dnl 642dnl Sets: 643dnl glibcxx_stylesheets 644dnl Substs: 645dnl XSL_STYLE_DIR 646dnl 647AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [ 648 649glibcxx_docbook_url=http://docbook.sourceforge.net/release/xsl-ns/current/ 650 651AC_MSG_CHECKING([for local stylesheet directory]) 652glibcxx_local_stylesheets=no 653if test x${XMLCATALOG} = xyes && xsl_style_dir=`xmlcatalog "" $glibcxx_docbook_url 2>/dev/null` 654then 655 XSL_STYLE_DIR=`echo $xsl_style_dir | sed -n 's;^file://;;p'` 656 glibcxx_local_stylesheets=yes 657else 658 for dir in \ 659 /usr/share/sgml/docbook/xsl-ns-stylesheets \ 660 /usr/share/xml/docbook/stylesheet/docbook-xsl-ns \ 661 /usr/share/xml/docbook/stylesheet/nwalsh5/current \ 662 /usr/share/xml/docbook/stylesheet/nwalsh/current 663 do 664 if test -d $dir; then 665 glibcxx_local_stylesheets=yes 666 XSL_STYLE_DIR=$dir 667 break 668 fi 669 done 670fi 671AC_MSG_RESULT($glibcxx_local_stylesheets) 672 673if test x"$glibcxx_local_stylesheets" = x"yes"; then 674 AC_SUBST(XSL_STYLE_DIR) 675 AC_MSG_NOTICE($XSL_STYLE_DIR) 676 677 AC_MSG_CHECKING([for docbook stylesheets for documentation creation]) 678 glibcxx_stylesheets=no 679 if test x${XMLCATALOG} = xno || xmlcatalog "" $glibcxx_docbook_url/xhtml/docbook.xsl >/dev/null 2>&1; then 680 if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude $glibcxx_docbook_url/xhtml/docbook.xsl - 2>/dev/null; then 681 glibcxx_stylesheets=yes 682 fi 683 fi 684 AC_MSG_RESULT($glibcxx_stylesheets) 685 686else 687 glibcxx_stylesheets=no 688fi 689 690# Check for epub3 dependencies. 691AC_MSG_CHECKING([for epub3 stylesheets for documentation creation]) 692glibcxx_epub_stylesheets=no 693if test x"$glibcxx_local_stylesheets" = x"yes"; then 694 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then 695 glibcxx_epub_stylesheets=yes 696 fi 697fi 698AC_MSG_RESULT($glibcxx_epub_stylesheets) 699AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes") 700 701]) 702 703 704dnl 705dnl Set up *_INCLUDES variables for all sundry Makefile.am's. 706dnl 707dnl Substs: 708dnl GLIBCXX_INCLUDES 709dnl TOPLEVEL_INCLUDES 710dnl 711AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [ 712 # Used for every C++ compile we perform. 713 GLIBCXX_INCLUDES="\ 714-I$glibcxx_builddir/include/$host_alias \ 715-I$glibcxx_builddir/include \ 716-I$glibcxx_srcdir/libsupc++" 717 718 # For Canadian crosses, pick this up too. 719 if test $CANADIAN = yes; then 720 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}" 721 fi 722 723 # Stuff in the actual top level. Currently only used by libsupc++ to 724 # get unwind* headers from the libgcc dir. 725 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include' 726 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc' 727 728 # Now, export this to all the little Makefiles.... 729 AC_SUBST(GLIBCXX_INCLUDES) 730 AC_SUBST(TOPLEVEL_INCLUDES) 731]) 732 733 734dnl 735dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's. 736dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.) 737dnl 738dnl Substs: 739dnl OPTIMIZE_CXXFLAGS 740dnl WARN_FLAGS 741dnl 742AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [ 743 # Optimization flags that are probably a good idea for thrill-seekers. Just 744 # uncomment the lines below and make, everything else is ready to go... 745 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host. 746 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc 747 AC_SUBST(OPTIMIZE_CXXFLAGS) 748 749 WARN_FLAGS="-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2" 750 AC_SUBST(WARN_FLAGS) 751]) 752 753 754dnl 755dnl All installation directory information is determined here. 756dnl 757dnl Substs: 758dnl gxx_install_dir 759dnl glibcxx_prefixdir 760dnl glibcxx_toolexecdir 761dnl glibcxx_toolexeclibdir 762dnl 763dnl Assumes cross_compiling bits already done, and with_cross_host in 764dnl particular. 765dnl 766dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir. 767dnl config/gxx-include-dir.m4 must be kept consistant with this as well. 768AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [ 769 glibcxx_toolexecdir=no 770 glibcxx_toolexeclibdir=no 771 glibcxx_prefixdir=$prefix 772 773 AC_MSG_CHECKING([for gxx-include-dir]) 774 AC_ARG_WITH([gxx-include-dir], 775 AC_HELP_STRING([--with-gxx-include-dir=DIR], 776 [installation directory for include files]), 777 [case "$withval" in 778 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;; 779 no) gxx_include_dir=no ;; 780 *) gxx_include_dir=$withval ;; 781 esac], 782 [gxx_include_dir=no]) 783 AC_MSG_RESULT($gxx_include_dir) 784 785 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 786 AC_ARG_ENABLE([version-specific-runtime-libs], 787 AC_HELP_STRING([--enable-version-specific-runtime-libs], 788 [Specify that runtime libraries should be installed in a compiler-specific directory]), 789 [case "$enableval" in 790 yes) version_specific_libs=yes ;; 791 no) version_specific_libs=no ;; 792 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 793 esac], 794 [version_specific_libs=no]) 795 AC_MSG_RESULT($version_specific_libs) 796 797 GCC_WITH_TOOLEXECLIBDIR 798 799 # Default case for install directory for include files. 800 if test $version_specific_libs = no && test $gxx_include_dir = no; then 801 gxx_include_dir='include/c++/${gcc_version}' 802 if test -n "$with_cross_host" && 803 test x"$with_cross_host" != x"no"; then 804 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir" 805 else 806 gxx_include_dir='${prefix}/'"$gxx_include_dir" 807 fi 808 fi 809 810 # Version-specific runtime libs processing. 811 if test $version_specific_libs = yes; then 812 # Need the gcc compiler version to know where to install libraries 813 # and header files if --enable-version-specific-runtime-libs option 814 # is selected. FIXME: these variables are misnamed, there are 815 # no executables installed in _toolexecdir or _toolexeclibdir. 816 if test x"$gxx_include_dir" = x"no"; then 817 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++' 818 fi 819 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' 820 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)' 821 fi 822 823 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir 824 # Install a library built with a cross compiler in tooldir, not libdir. 825 if test x"$glibcxx_toolexecdir" = x"no"; then 826 if test -n "$with_cross_host" && 827 test x"$with_cross_host" != x"no"; then 828 glibcxx_toolexecdir='${exec_prefix}/${host_alias}' 829 case ${with_toolexeclibdir} in 830 no) 831 glibcxx_toolexeclibdir='${toolexecdir}/lib' 832 ;; 833 *) 834 glibcxx_toolexeclibdir=${with_toolexeclibdir} 835 ;; 836 esac 837 else 838 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' 839 glibcxx_toolexeclibdir='${libdir}' 840 fi 841 multi_os_directory=`$CXX -print-multi-os-directory` 842 case $multi_os_directory in 843 .) ;; # Avoid trailing /. 844 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;; 845 esac 846 fi 847 848 AC_MSG_CHECKING([for install location]) 849 AC_MSG_RESULT($gxx_include_dir) 850 851 AC_SUBST(glibcxx_prefixdir) 852 AC_SUBST(gxx_include_dir) 853 AC_SUBST(glibcxx_toolexecdir) 854 AC_SUBST(glibcxx_toolexeclibdir) 855]) 856 857 858dnl 859dnl GLIBCXX_ENABLE 860dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING) 861dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c) 862dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER) 863dnl 864dnl See manual/appendix_porting.html#appendix.porting.build_hacking for 865dnl documentation. 866dnl 867m4_define([GLIBCXX_ENABLE],[dnl 868m4_define([_g_switch],[--enable-$1])dnl 869m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl 870 AC_ARG_ENABLE([$1],m4_dquote(_g_help), 871 m4_bmatch([$5], 872 [^permit ], 873 [[ 874 case "$enableval" in 875 m4_bpatsubst([$5],[permit ])) ;; 876 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; 877 dnl Idea for future: generate a URL pointing to 878 dnl "onlinedocs/configopts.html#whatever" 879 esac 880 ]], 881 [^$], 882 [[ 883 case "$enableval" in 884 yes|no) ;; 885 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; 886 esac 887 ]], 888 [[$5]]), 889 [enable_]m4_bpatsubst([$1],-,_)[=][$2]) 890m4_undefine([_g_switch])dnl 891m4_undefine([_g_help])dnl 892]) 893 894 895dnl 896dnl Check for ISO/IEC 9899:1999 "C99" support. 897dnl 898dnl --enable-c99 defines _GLIBCXX_USE_C99 899dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined 900dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)] 901dnl Where DEFAULT is either `yes' or `no'. 902dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'. 903dnl 904AC_DEFUN([GLIBCXX_ENABLE_C99], [ 905 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support]) 906 907 if test x"$enable_c99" = x"yes"; then 908 AC_LANG_SAVE 909 AC_LANG_CPLUSPLUS 910 911 # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__ 912 # undefined may cause fake C99 facilities, like pre-standard snprintf, 913 # to be spuriously enabled. 914 ac_save_CXXFLAGS="$CXXFLAGS" 915 CXXFLAGS="$CXXFLAGS -std=c++98" 916 ac_save_LIBS="$LIBS" 917 ac_save_gcc_no_link="$gcc_no_link" 918 919 if test x$gcc_no_link != xyes; then 920 # Use -fno-exceptions to that the C driver can link these tests without 921 # hitting undefined references to personality routines. 922 CXXFLAGS="$CXXFLAGS -fno-exceptions" 923 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [ 924 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK 925 gcc_no_link=yes 926 ]) 927 fi 928 929 # Check for the existence of <math.h> functions used if C99 is enabled. 930 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++98]) 931 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx98, [ 932 GCC_TRY_COMPILE_OR_LINK( 933 [#include <math.h> 934 volatile double d1, d2; 935 volatile int i;], 936 [i = fpclassify(d1); 937 i = isfinite(d1); 938 i = isinf(d1); 939 i = isnan(d1); 940 i = isnormal(d1); 941 i = signbit(d1); 942 i = isgreater(d1, d2); 943 i = isgreaterequal(d1, d2); 944 i = isless(d1, d2); 945 i = islessequal(d1, d2); 946 i = islessgreater(d1, d2); 947 i = islessgreater(d1, d2); 948 i = isunordered(d1, d2); 949 ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no]) 950 ]) 951 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx98) 952 if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then 953 AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1, 954 [Define if C99 functions or macros in <math.h> should be imported 955 in <cmath> in namespace std for C++98.]) 956 fi 957 958 # Check for the existence of <complex.h> complex math functions. 959 # This is necessary even though libstdc++ uses the builtin versions 960 # of these functions, because if the builtin cannot be used, a reference 961 # to the library function is emitted. 962 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no) 963 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 964 if test x"$ac_has_complex_h" = x"yes"; then 965 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++98]) 966 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx98, [ 967 GCC_TRY_COMPILE_OR_LINK( 968 [#include <complex.h> 969 typedef __complex__ float float_type; 970 typedef __complex__ double double_type; 971 typedef __complex__ long double ld_type; 972 volatile float_type tmpf; 973 volatile double_type tmpd; 974 volatile ld_type tmpld; 975 volatile float f; 976 volatile double d; 977 volatile long double ld;], 978 [f = cabsf(tmpf); 979 f = cargf(tmpf); 980 tmpf = ccosf(tmpf); 981 tmpf = ccoshf(tmpf); 982 tmpf = cexpf(tmpf); 983 tmpf = clogf(tmpf); 984 tmpf = csinf(tmpf); 985 tmpf = csinhf(tmpf); 986 tmpf = csqrtf(tmpf); 987 tmpf = ctanf(tmpf); 988 tmpf = ctanhf(tmpf); 989 tmpf = cpowf(tmpf, tmpf); 990 tmpf = cprojf(tmpf); 991 d = cabs(tmpd); 992 d = carg(tmpd); 993 tmpd = ccos(tmpd); 994 tmpd = ccosh(tmpd); 995 tmpd = cexp(tmpd); 996 tmpd = clog(tmpd); 997 tmpd = csin(tmpd); 998 tmpd = csinh(tmpd); 999 tmpd = csqrt(tmpd); 1000 tmpd = ctan(tmpd); 1001 tmpd = ctanh(tmpd); 1002 tmpd = cpow(tmpd, tmpd); 1003 tmpd = cproj(tmpd); 1004 ld = cabsl(tmpld); 1005 ld = cargl(tmpld); 1006 tmpld = ccosl(tmpld); 1007 tmpld = ccoshl(tmpld); 1008 tmpld = cexpl(tmpld); 1009 tmpld = clogl(tmpld); 1010 tmpld = csinl(tmpld); 1011 tmpld = csinhl(tmpld); 1012 tmpld = csqrtl(tmpld); 1013 tmpld = ctanl(tmpld); 1014 tmpld = ctanhl(tmpld); 1015 tmpld = cpowl(tmpld, tmpld); 1016 tmpld = cprojl(tmpld); 1017 ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no]) 1018 ]) 1019 fi 1020 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx98) 1021 if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then 1022 AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1, 1023 [Define if C99 functions in <complex.h> should be used in 1024 <complex> for C++98. Using compiler builtins for these functions 1025 requires corresponding C99 library functions to be present.]) 1026 fi 1027 1028 # Check for the existence in <stdio.h> of vscanf, et. al. 1029 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++98]) 1030 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx98, [ 1031 GCC_TRY_COMPILE_OR_LINK( 1032 [#include <stdio.h> 1033 #include <stdarg.h> 1034 void foo(char* fmt, ...) 1035 { 1036 va_list args; va_start(args, fmt); 1037 vfscanf(stderr, "%i", args); 1038 vscanf("%i", args); 1039 vsnprintf(fmt, 0, "%i", args); 1040 vsscanf(fmt, "%i", args); 1041 snprintf(fmt, 0, "%i"); 1042 }], [], 1043 [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no]) 1044 ]) 1045 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx98) 1046 if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then 1047 AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1, 1048 [Define if C99 functions or macros in <stdio.h> should be imported 1049 in <cstdio> in namespace std for C++98.]) 1050 fi 1051 1052 # Check for the existence in <stdlib.h> of lldiv_t, et. al. 1053 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++98]) 1054 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx98, [ 1055 GCC_TRY_COMPILE_OR_LINK( 1056 [#include <stdlib.h> 1057 volatile float f; 1058 volatile long double ld; 1059 volatile unsigned long long ll; 1060 lldiv_t mydivt;], 1061 [char* tmp; 1062 f = strtof("gnu", &tmp); 1063 ld = strtold("gnu", &tmp); 1064 ll = strtoll("gnu", &tmp, 10); 1065 ll = strtoull("gnu", &tmp, 10); 1066 ll = llabs(10); 1067 mydivt = lldiv(10,1); 1068 ll = mydivt.quot; 1069 ll = mydivt.rem; 1070 ll = atoll("10"); 1071 _Exit(0); 1072 ], [glibcxx_cv_c99_stdlib_cxx98=yes], [glibcxx_cv_c99_stdlib_cxx98=no]) 1073 ]) 1074 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx98) 1075 if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then 1076 AC_DEFINE(_GLIBCXX98_USE_C99_STDLIB, 1, 1077 [Define if C99 functions or macros in <stdlib.h> should be imported 1078 in <cstdlib> in namespace std for C++98.]) 1079 fi 1080 1081 # Check for the existence in <wchar.h> of wcstold, etc. 1082 if test x"$ac_has_wchar_h" = xyes && 1083 test x"$ac_has_wctype_h" = xyes; then 1084 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++98]) 1085 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx98, [ 1086 AC_TRY_COMPILE([#include <wchar.h> 1087 namespace test 1088 { 1089 using ::wcstold; 1090 using ::wcstoll; 1091 using ::wcstoull; 1092 } 1093 ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no]) 1094 ]) 1095 1096 # Checks for wide character functions that may not be present. 1097 # Injection of these is wrapped with guard macros. 1098 # NB: only put functions here, instead of immediately above, if 1099 # absolutely necessary. 1100 AC_TRY_COMPILE([#include <wchar.h> 1101 namespace test { using ::vfwscanf; }], [], 1102 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], []) 1103 1104 AC_TRY_COMPILE([#include <wchar.h> 1105 namespace test { using ::vswscanf; }], [], 1106 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], []) 1107 1108 AC_TRY_COMPILE([#include <wchar.h> 1109 namespace test { using ::vwscanf; }], [], 1110 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], []) 1111 1112 AC_TRY_COMPILE([#include <wchar.h> 1113 namespace test { using ::wcstof; }], [], 1114 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], []) 1115 1116 AC_TRY_COMPILE([#include <wctype.h>], 1117 [wint_t t; int i = iswblank(t);], 1118 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], []) 1119 1120 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx98) 1121 if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then 1122 AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1, 1123 [Define if C99 functions or macros in <wchar.h> should be imported 1124 in <cwchar> in namespace std for C++98.]) 1125 fi 1126 fi 1127 1128 # Option parsed, now set things appropriately. 1129 if test x"$glibcxx_cv_c99_math_cxx98" = x"no" || 1130 test x"$glibcxx_cv_c99_complex_cxx98" = x"no" || 1131 test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" || 1132 test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" || 1133 test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then 1134 enable_c99=no; 1135 else 1136 AC_DEFINE(_GLIBCXX_USE_C99, 1, 1137 [Define if C99 functions or macros from <wchar.h>, <math.h>, 1138 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.]) 1139 fi 1140 1141 gcc_no_link="$ac_save_gcc_no_link" 1142 LIBS="$ac_save_LIBS" 1143 CXXFLAGS="$ac_save_CXXFLAGS" 1144 AC_LANG_RESTORE 1145 1146 AC_LANG_SAVE 1147 AC_LANG_CPLUSPLUS 1148 1149 # Use -std=c++11 and test again for C99 library feature in C++11 mode. 1150 # For the reasons given above we use -std=c++11 not -std=gnu++11. 1151 ac_save_CXXFLAGS="$CXXFLAGS" 1152 CXXFLAGS="$CXXFLAGS -std=c++11" 1153 ac_save_LIBS="$LIBS" 1154 ac_save_gcc_no_link="$gcc_no_link" 1155 1156 if test x$gcc_no_link != xyes; then 1157 # Use -fno-exceptions to that the C driver can link these tests without 1158 # hitting undefined references to personality routines. 1159 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1160 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [ 1161 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK 1162 gcc_no_link=yes 1163 ]) 1164 fi 1165 1166 # Check for the existence of <math.h> functions used if C99 is enabled. 1167 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++11]) 1168 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx11, [ 1169 GCC_TRY_COMPILE_OR_LINK( 1170 [#include <math.h> 1171 volatile double d1, d2; 1172 volatile int i;], 1173 [i = fpclassify(d1); 1174 i = isfinite(d1); 1175 i = isinf(d1); 1176 i = isnan(d1); 1177 i = isnormal(d1); 1178 i = signbit(d1); 1179 i = isgreater(d1, d2); 1180 i = isgreaterequal(d1, d2); 1181 i = isless(d1, d2); 1182 i = islessequal(d1, d2); 1183 i = islessgreater(d1, d2); 1184 i = islessgreater(d1, d2); 1185 i = isunordered(d1, d2); 1186 ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no]) 1187 ]) 1188 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx11) 1189 if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then 1190 AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1, 1191 [Define if C99 functions or macros in <math.h> should be imported 1192 in <cmath> in namespace std for C++11.]) 1193 fi 1194 1195 # Check for the existence of <complex.h> complex math functions. 1196 # This is necessary even though libstdc++ uses the builtin versions 1197 # of these functions, because if the builtin cannot be used, a reference 1198 # to the library function is emitted. 1199 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no) 1200 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 1201 if test x"$ac_has_complex_h" = x"yes"; then 1202 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++11]) 1203 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx11, [ 1204 GCC_TRY_COMPILE_OR_LINK( 1205 [#include <complex.h> 1206 typedef __complex__ float float_type; 1207 typedef __complex__ double double_type; 1208 typedef __complex__ long double ld_type; 1209 volatile float_type tmpf; 1210 volatile double_type tmpd; 1211 volatile ld_type tmpld; 1212 volatile float f; 1213 volatile double d; 1214 volatile long double ld;], 1215 [f = cabsf(tmpf); 1216 f = cargf(tmpf); 1217 tmpf = ccosf(tmpf); 1218 tmpf = ccoshf(tmpf); 1219 tmpf = cexpf(tmpf); 1220 tmpf = clogf(tmpf); 1221 tmpf = csinf(tmpf); 1222 tmpf = csinhf(tmpf); 1223 tmpf = csqrtf(tmpf); 1224 tmpf = ctanf(tmpf); 1225 tmpf = ctanhf(tmpf); 1226 tmpf = cpowf(tmpf, tmpf); 1227 tmpf = cprojf(tmpf); 1228 d = cabs(tmpd); 1229 d = carg(tmpd); 1230 tmpd = ccos(tmpd); 1231 tmpd = ccosh(tmpd); 1232 tmpd = cexp(tmpd); 1233 tmpd = clog(tmpd); 1234 tmpd = csin(tmpd); 1235 tmpd = csinh(tmpd); 1236 tmpd = csqrt(tmpd); 1237 tmpd = ctan(tmpd); 1238 tmpd = ctanh(tmpd); 1239 tmpd = cpow(tmpd, tmpd); 1240 tmpd = cproj(tmpd); 1241 ld = cabsl(tmpld); 1242 ld = cargl(tmpld); 1243 tmpld = ccosl(tmpld); 1244 tmpld = ccoshl(tmpld); 1245 tmpld = cexpl(tmpld); 1246 tmpld = clogl(tmpld); 1247 tmpld = csinl(tmpld); 1248 tmpld = csinhl(tmpld); 1249 tmpld = csqrtl(tmpld); 1250 tmpld = ctanl(tmpld); 1251 tmpld = ctanhl(tmpld); 1252 tmpld = cpowl(tmpld, tmpld); 1253 tmpld = cprojl(tmpld); 1254 ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no]) 1255 ]) 1256 fi 1257 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx11) 1258 if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then 1259 AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1, 1260 [Define if C99 functions in <complex.h> should be used in 1261 <complex> for C++11. Using compiler builtins for these functions 1262 requires corresponding C99 library functions to be present.]) 1263 fi 1264 1265 # Check for the existence in <stdio.h> of vscanf, et. al. 1266 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++11]) 1267 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx11, [ 1268 GCC_TRY_COMPILE_OR_LINK( 1269 [#include <stdio.h> 1270 #include <stdarg.h> 1271 void foo(char* fmt, ...) 1272 { 1273 va_list args; va_start(args, fmt); 1274 vfscanf(stderr, "%i", args); 1275 vscanf("%i", args); 1276 vsnprintf(fmt, 0, "%i", args); 1277 vsscanf(fmt, "%i", args); 1278 snprintf(fmt, 0, "%i"); 1279 }], [], 1280 [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no]) 1281 ]) 1282 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx11) 1283 if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then 1284 AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1, 1285 [Define if C99 functions or macros in <stdio.h> should be imported 1286 in <cstdio> in namespace std for C++11.]) 1287 fi 1288 1289 # Check for the existence in <stdlib.h> of lldiv_t, et. al. 1290 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++11]) 1291 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx11, [ 1292 GCC_TRY_COMPILE_OR_LINK( 1293 [#include <stdlib.h> 1294 volatile float f; 1295 volatile long double ld; 1296 volatile unsigned long long ll; 1297 lldiv_t mydivt;], 1298 [char* tmp; 1299 f = strtof("gnu", &tmp); 1300 ld = strtold("gnu", &tmp); 1301 ll = strtoll("gnu", &tmp, 10); 1302 ll = strtoull("gnu", &tmp, 10); 1303 ll = llabs(10); 1304 mydivt = lldiv(10,1); 1305 ll = mydivt.quot; 1306 ll = mydivt.rem; 1307 ll = atoll("10"); 1308 _Exit(0); 1309 ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no]) 1310 ]) 1311 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx11) 1312 if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then 1313 AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1, 1314 [Define if C99 functions or macros in <stdlib.h> should be imported 1315 in <cstdlib> in namespace std for C++11.]) 1316 fi 1317 1318 # Check for the existence in <wchar.h> of wcstold, etc. 1319 if test x"$ac_has_wchar_h" = xyes && 1320 test x"$ac_has_wctype_h" = xyes; then 1321 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++11]) 1322 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx11, [ 1323 AC_TRY_COMPILE([#include <wchar.h> 1324 namespace test 1325 { 1326 using ::wcstold; 1327 using ::wcstoll; 1328 using ::wcstoull; 1329 } 1330 ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no]) 1331 ]) 1332 1333 # Checks for wide character functions that may not be present. 1334 # Injection of these is wrapped with guard macros. 1335 # NB: only put functions here, instead of immediately above, if 1336 # absolutely necessary. 1337 AC_TRY_COMPILE([#include <wchar.h> 1338 namespace test { using ::vfwscanf; }], [], 1339 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], []) 1340 1341 AC_TRY_COMPILE([#include <wchar.h> 1342 namespace test { using ::vswscanf; }], [], 1343 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], []) 1344 1345 AC_TRY_COMPILE([#include <wchar.h> 1346 namespace test { using ::vwscanf; }], [], 1347 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], []) 1348 1349 AC_TRY_COMPILE([#include <wchar.h> 1350 namespace test { using ::wcstof; }], [], 1351 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], []) 1352 1353 AC_TRY_COMPILE([#include <wctype.h>], 1354 [wint_t t; int i = iswblank(t);], 1355 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], []) 1356 1357 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx11) 1358 if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then 1359 AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1, 1360 [Define if C99 functions or macros in <wchar.h> should be imported 1361 in <cwchar> in namespace std for C++11.]) 1362 fi 1363 fi 1364 1365 gcc_no_link="$ac_save_gcc_no_link" 1366 LIBS="$ac_save_LIBS" 1367 CXXFLAGS="$ac_save_CXXFLAGS" 1368 AC_LANG_RESTORE 1369 fi 1370 1371 AC_MSG_CHECKING([for fully enabled ISO C99 support]) 1372 AC_MSG_RESULT($enable_c99) 1373]) 1374 1375 1376dnl 1377dnl Check for clock_gettime, nanosleep and sched_yield, used in the 1378dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this] 1379dnl in the C++11 standard. 1380dnl 1381dnl --enable-libstdcxx-time 1382dnl --enable-libstdcxx-time=yes 1383dnl checks for the availability of monotonic and realtime clocks, 1384dnl nanosleep and sched_yield in libc. 1385dnl --enable-libstdcxx-time=rt 1386dnl also searches (and, if needed, links) librt. Note that this is 1387dnl not always desirable because, in glibc 2.16 and earlier, for 1388dnl example, in turn it triggers the linking of libpthread too, 1389dnl which activates locking, 1390dnl a large overhead for single-thread programs. 1391dnl --enable-libstdcxx-time=no 1392dnl --disable-libstdcxx-time 1393dnl disables the checks completely 1394dnl 1395dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX 1396dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test 1397dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in 1398dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD. 1399dnl 1400AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [ 1401 1402 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]], 1403 [use KIND for check type], 1404 [permit yes|no|rt]) 1405 1406 AC_LANG_SAVE 1407 AC_LANG_CPLUSPLUS 1408 ac_save_CXXFLAGS="$CXXFLAGS" 1409 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1410 ac_save_LIBS="$LIBS" 1411 1412 ac_has_clock_monotonic=no 1413 ac_has_clock_realtime=no 1414 ac_has_nanosleep=no 1415 ac_has_sched_yield=no 1416 1417 if test x"$enable_libstdcxx_time" = x"auto"; then 1418 1419 case "${target_os}" in 1420 cygwin*) 1421 ac_has_nanosleep=yes 1422 ;; 1423 darwin*) 1424 ac_has_nanosleep=yes 1425 ac_has_sched_yield=yes 1426 ;; 1427 # VxWorks has nanosleep as soon as the kernel is configured with 1428 # INCLUDE_POSIX_TIMERS, which is normally/most-often the case. 1429 vxworks*) 1430 ac_has_nanosleep=yes 1431 ;; 1432 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) 1433 # Don't use link test for freestanding library, in case gcc_no_link=yes 1434 if test x"$is_hosted" = xyes; then 1435 # Versions of glibc before 2.17 needed -lrt for clock_gettime. 1436 AC_SEARCH_LIBS(clock_gettime, [rt]) 1437 if test x"$ac_cv_search_clock_gettime" = x"none required"; then 1438 ac_has_clock_monotonic=yes 1439 ac_has_clock_realtime=yes 1440 fi 1441 fi 1442 ac_has_nanosleep=yes 1443 ac_has_sched_yield=yes 1444 ;; 1445 freebsd*|netbsd*|dragonfly*|rtems*) 1446 ac_has_clock_monotonic=yes 1447 ac_has_clock_realtime=yes 1448 ac_has_nanosleep=yes 1449 ac_has_sched_yield=yes 1450 ;; 1451 openbsd*) 1452 ac_has_clock_monotonic=yes 1453 ac_has_clock_realtime=yes 1454 ac_has_nanosleep=yes 1455 ;; 1456 solaris*) 1457 ac_has_clock_monotonic=yes 1458 ac_has_clock_realtime=yes 1459 ac_has_nanosleep=yes 1460 ac_has_sched_yield=yes 1461 ;; 1462 uclinux*) 1463 ac_has_nanosleep=yes 1464 ac_has_sched_yield=yes 1465 esac 1466 1467 elif test x"$enable_libstdcxx_time" != x"no"; then 1468 1469 if test x"$enable_libstdcxx_time" = x"rt"; then 1470 AC_SEARCH_LIBS(clock_gettime, [rt]) 1471 AC_SEARCH_LIBS(nanosleep, [rt]) 1472 else 1473 AC_CHECK_FUNC(clock_gettime) 1474 AC_CHECK_FUNC(nanosleep) 1475 fi 1476 1477 case "$ac_cv_search_clock_gettime" in 1478 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime 1479 ;; 1480 esac 1481 case "$ac_cv_search_nanosleep" in 1482 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep" 1483 ;; 1484 esac 1485 1486 AC_SEARCH_LIBS(sched_yield, [rt]) 1487 1488 case "$ac_cv_search_sched_yield" in 1489 -lrt*) 1490 if test x"$enable_libstdcxx_time" = x"rt"; then 1491 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield" 1492 ac_has_sched_yield=yes 1493 fi 1494 ;; 1495 *) 1496 ac_has_sched_yield=yes 1497 ;; 1498 esac 1499 1500 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no) 1501 1502 if test x"$ac_has_unistd_h" = x"yes"; then 1503 AC_MSG_CHECKING([for monotonic clock]) 1504 AC_TRY_LINK( 1505 [#include <unistd.h> 1506 #include <time.h> 1507 ], 1508 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) 1509 timespec tp; 1510 #endif 1511 clock_gettime(CLOCK_MONOTONIC, &tp); 1512 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no]) 1513 1514 AC_MSG_RESULT($ac_has_clock_monotonic) 1515 1516 AC_MSG_CHECKING([for realtime clock]) 1517 AC_TRY_LINK( 1518 [#include <unistd.h> 1519 #include <time.h> 1520 ], 1521 [#if _POSIX_TIMERS > 0 1522 timespec tp; 1523 #endif 1524 clock_gettime(CLOCK_REALTIME, &tp); 1525 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no]) 1526 1527 AC_MSG_RESULT($ac_has_clock_realtime) 1528 1529 AC_MSG_CHECKING([for nanosleep]) 1530 AC_TRY_LINK( 1531 [#include <unistd.h> 1532 #include <time.h> 1533 ], 1534 [#if _POSIX_TIMERS > 0 1535 timespec tp; 1536 #endif 1537 nanosleep(&tp, 0); 1538 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no]) 1539 1540 AC_MSG_RESULT($ac_has_nanosleep) 1541 fi 1542 fi 1543 1544 if test x"$ac_has_clock_monotonic" != x"yes"; then 1545 case ${target_os} in 1546 linux* | uclinux*) 1547 AC_MSG_CHECKING([for clock_gettime syscall]) 1548 AC_TRY_COMPILE( 1549 [#include <unistd.h> 1550 #include <time.h> 1551 #include <sys/syscall.h> 1552 ], 1553 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) 1554 timespec tp; 1555 #endif 1556 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp); 1557 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp); 1558 ], [ac_has_clock_gettime_syscall=yes], [ac_has_clock_gettime_syscall=no]) 1559 AC_MSG_RESULT($ac_has_clock_gettime_syscall) 1560 if test x"$ac_has_clock_gettime_syscall" = x"yes"; then 1561 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1, 1562 [Defined if clock_gettime syscall has monotonic and realtime clock support. ]) 1563 ac_has_clock_monotonic=yes 1564 ac_has_clock_realtime=yes 1565 AC_MSG_CHECKING([for struct timespec that matches syscall]) 1566 AC_TRY_COMPILE( 1567 [#include <time.h> 1568 #include <sys/syscall.h> 1569 ], 1570 [#ifdef SYS_clock_gettime64 1571 #if SYS_clock_gettime64 != SYS_clock_gettime 1572 // We need to use SYS_clock_gettime and libc appears to 1573 // also know about the SYS_clock_gettime64 syscall. 1574 // Check that userspace doesn't use time64 version of timespec. 1575 static_assert(sizeof(timespec::tv_sec) == sizeof(long), 1576 "struct timespec must be compatible with SYS_clock_gettime"); 1577 #endif 1578 #endif 1579 ], 1580 [ac_timespec_matches_syscall=yes], 1581 [ac_timespec_matches_syscall=no]) 1582 AC_MSG_RESULT($ac_timespec_matches_syscall) 1583 if test x"$ac_timespec_matches_syscall" = no; then 1584 AC_MSG_ERROR([struct timespec is not compatible with SYS_clock_gettime, please report a bug to http://gcc.gnu.org/bugzilla]) 1585 fi 1586 fi;; 1587 esac 1588 fi 1589 1590 if test x"$ac_has_clock_monotonic" = x"yes"; then 1591 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1, 1592 [ Defined if clock_gettime has monotonic clock support. ]) 1593 fi 1594 1595 if test x"$ac_has_clock_realtime" = x"yes"; then 1596 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1, 1597 [ Defined if clock_gettime has realtime clock support. ]) 1598 fi 1599 1600 if test x"$ac_has_sched_yield" = x"yes"; then 1601 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1, 1602 [ Defined if sched_yield is available. ]) 1603 fi 1604 1605 if test x"$ac_has_nanosleep" = x"yes"; then 1606 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1, 1607 [ Defined if nanosleep is available. ]) 1608 else 1609 AC_MSG_CHECKING([for sleep]) 1610 AC_TRY_COMPILE([#include <unistd.h>], 1611 [sleep(1)], 1612 [ac_has_sleep=yes],[ac_has_sleep=no]) 1613 if test x"$ac_has_sleep" = x"yes"; then 1614 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.]) 1615 fi 1616 AC_MSG_RESULT($ac_has_sleep) 1617 AC_MSG_CHECKING([for usleep]) 1618 AC_TRY_COMPILE([#include <unistd.h>], 1619 [sleep(1); 1620 usleep(100);], 1621 [ac_has_usleep=yes],[ac_has_usleep=no]) 1622 if test x"$ac_has_usleep" = x"yes"; then 1623 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.]) 1624 fi 1625 AC_MSG_RESULT($ac_has_usleep) 1626 fi 1627 1628 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then 1629 ac_no_sleep=yes 1630 AC_MSG_CHECKING([for Sleep]) 1631 AC_TRY_COMPILE([#include <windows.h>], 1632 [Sleep(1)], 1633 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no]) 1634 if test x"$ac_has_win32_sleep" = x"yes"; then 1635 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.]) 1636 ac_no_sleep=no 1637 fi 1638 AC_MSG_RESULT($ac_has_win32_sleep) 1639 fi 1640 1641 if test x"$ac_no_sleep" = x"yes"; then 1642 AC_DEFINE(NO_SLEEP,1, [Defined if no way to sleep is available.]) 1643 fi 1644 1645 AC_SUBST(GLIBCXX_LIBS) 1646 1647 CXXFLAGS="$ac_save_CXXFLAGS" 1648 LIBS="$ac_save_LIBS" 1649 AC_LANG_RESTORE 1650]) 1651 1652dnl 1653dnl Check for gettimeofday, used in the implementation of 20.11.7 1654dnl [time.clock] in the C++11 standard. 1655dnl 1656AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [ 1657 1658 AC_MSG_CHECKING([for gettimeofday]) 1659 1660 AC_LANG_SAVE 1661 AC_LANG_CPLUSPLUS 1662 ac_save_CXXFLAGS="$CXXFLAGS" 1663 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1664 1665 ac_has_gettimeofday=no; 1666 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no) 1667 if test x"$ac_has_sys_time_h" = x"yes"; then 1668 AC_MSG_CHECKING([for gettimeofday]) 1669 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>], 1670 [timeval tv; gettimeofday(&tv, 0);], 1671 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no]) 1672 1673 AC_MSG_RESULT($ac_has_gettimeofday) 1674 fi 1675 1676 if test x"$ac_has_gettimeofday" = x"yes"; then 1677 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1, 1678 [ Defined if gettimeofday is available. ]) 1679 fi 1680 1681 CXXFLAGS="$ac_save_CXXFLAGS" 1682 AC_LANG_RESTORE 1683]) 1684 1685dnl 1686dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1" 1687dnl facilities in Chapter 8, "C compatibility". 1688dnl 1689AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [ 1690 1691 AC_LANG_SAVE 1692 AC_LANG_CPLUSPLUS 1693 1694 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__ 1695 # undefined and fake C99 facilities may be spuriously enabled. 1696 ac_save_CXXFLAGS="$CXXFLAGS" 1697 CXXFLAGS="$CXXFLAGS -std=c++98" 1698 1699 # Check for the existence of <complex.h> complex math functions used 1700 # by tr1/complex. 1701 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 1702 ac_c99_complex_tr1=no; 1703 if test x"$ac_has_complex_h" = x"yes"; then 1704 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>]) 1705 AC_TRY_COMPILE([#include <complex.h>], 1706 [typedef __complex__ float float_type; float_type tmpf; 1707 cacosf(tmpf); 1708 casinf(tmpf); 1709 catanf(tmpf); 1710 cacoshf(tmpf); 1711 casinhf(tmpf); 1712 catanhf(tmpf); 1713 typedef __complex__ double double_type; double_type tmpd; 1714 cacos(tmpd); 1715 casin(tmpd); 1716 catan(tmpd); 1717 cacosh(tmpd); 1718 casinh(tmpd); 1719 catanh(tmpd); 1720 typedef __complex__ long double ld_type; ld_type tmpld; 1721 cacosl(tmpld); 1722 casinl(tmpld); 1723 catanl(tmpld); 1724 cacoshl(tmpld); 1725 casinhl(tmpld); 1726 catanhl(tmpld); 1727 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no]) 1728 fi 1729 AC_MSG_RESULT($ac_c99_complex_tr1) 1730 if test x"$ac_c99_complex_tr1" = x"yes"; then 1731 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1, 1732 [Define if C99 functions in <complex.h> should be used in 1733 <tr1/complex>. Using compiler builtins for these functions 1734 requires corresponding C99 library functions to be present.]) 1735 fi 1736 1737 # Check for the existence of <ctype.h> functions. 1738 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>]) 1739 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [ 1740 AC_TRY_COMPILE([#include <ctype.h>], 1741 [int ch; 1742 int ret; 1743 ret = isblank(ch); 1744 ],[glibcxx_cv_c99_ctype_tr1=yes], 1745 [glibcxx_cv_c99_ctype_tr1=no]) 1746 ]) 1747 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1) 1748 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then 1749 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1, 1750 [Define if C99 functions in <ctype.h> should be imported in 1751 <tr1/cctype> in namespace std::tr1.]) 1752 fi 1753 1754 # Check for the existence of <fenv.h> functions. 1755 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no) 1756 ac_c99_fenv_tr1=no; 1757 if test x"$ac_has_fenv_h" = x"yes"; then 1758 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>]) 1759 AC_TRY_COMPILE([#include <fenv.h>], 1760 [int except, mode; 1761 fexcept_t* pflag; 1762 fenv_t* penv; 1763 int ret; 1764 ret = feclearexcept(except); 1765 ret = fegetexceptflag(pflag, except); 1766 ret = feraiseexcept(except); 1767 ret = fesetexceptflag(pflag, except); 1768 ret = fetestexcept(except); 1769 ret = fegetround(); 1770 ret = fesetround(mode); 1771 ret = fegetenv(penv); 1772 ret = feholdexcept(penv); 1773 ret = fesetenv(penv); 1774 ret = feupdateenv(penv); 1775 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no]) 1776 fi 1777 AC_MSG_RESULT($ac_c99_fenv_tr1) 1778 if test x"$ac_c99_fenv_tr1" = x"yes"; then 1779 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1, 1780 [Define if C99 functions in <fenv.h> should be imported in 1781 <tr1/cfenv> in namespace std::tr1.]) 1782 fi 1783 1784 # Check for the existence of <stdint.h> types. 1785 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>]) 1786 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [ 1787 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS 1788 #define __STDC_CONSTANT_MACROS 1789 #include <stdint.h>], 1790 [typedef int8_t my_int8_t; 1791 my_int8_t i8 = INT8_MIN; 1792 i8 = INT8_MAX; 1793 typedef int16_t my_int16_t; 1794 my_int16_t i16 = INT16_MIN; 1795 i16 = INT16_MAX; 1796 typedef int32_t my_int32_t; 1797 my_int32_t i32 = INT32_MIN; 1798 i32 = INT32_MAX; 1799 typedef int64_t my_int64_t; 1800 my_int64_t i64 = INT64_MIN; 1801 i64 = INT64_MAX; 1802 typedef int_fast8_t my_int_fast8_t; 1803 my_int_fast8_t if8 = INT_FAST8_MIN; 1804 if8 = INT_FAST8_MAX; 1805 typedef int_fast16_t my_int_fast16_t; 1806 my_int_fast16_t if16 = INT_FAST16_MIN; 1807 if16 = INT_FAST16_MAX; 1808 typedef int_fast32_t my_int_fast32_t; 1809 my_int_fast32_t if32 = INT_FAST32_MIN; 1810 if32 = INT_FAST32_MAX; 1811 typedef int_fast64_t my_int_fast64_t; 1812 my_int_fast64_t if64 = INT_FAST64_MIN; 1813 if64 = INT_FAST64_MAX; 1814 typedef int_least8_t my_int_least8_t; 1815 my_int_least8_t il8 = INT_LEAST8_MIN; 1816 il8 = INT_LEAST8_MAX; 1817 typedef int_least16_t my_int_least16_t; 1818 my_int_least16_t il16 = INT_LEAST16_MIN; 1819 il16 = INT_LEAST16_MAX; 1820 typedef int_least32_t my_int_least32_t; 1821 my_int_least32_t il32 = INT_LEAST32_MIN; 1822 il32 = INT_LEAST32_MAX; 1823 typedef int_least64_t my_int_least64_t; 1824 my_int_least64_t il64 = INT_LEAST64_MIN; 1825 il64 = INT_LEAST64_MAX; 1826 typedef intmax_t my_intmax_t; 1827 my_intmax_t im = INTMAX_MAX; 1828 im = INTMAX_MIN; 1829 typedef intptr_t my_intptr_t; 1830 my_intptr_t ip = INTPTR_MAX; 1831 ip = INTPTR_MIN; 1832 typedef uint8_t my_uint8_t; 1833 my_uint8_t ui8 = UINT8_MAX; 1834 ui8 = UINT8_MAX; 1835 typedef uint16_t my_uint16_t; 1836 my_uint16_t ui16 = UINT16_MAX; 1837 ui16 = UINT16_MAX; 1838 typedef uint32_t my_uint32_t; 1839 my_uint32_t ui32 = UINT32_MAX; 1840 ui32 = UINT32_MAX; 1841 typedef uint64_t my_uint64_t; 1842 my_uint64_t ui64 = UINT64_MAX; 1843 ui64 = UINT64_MAX; 1844 typedef uint_fast8_t my_uint_fast8_t; 1845 my_uint_fast8_t uif8 = UINT_FAST8_MAX; 1846 uif8 = UINT_FAST8_MAX; 1847 typedef uint_fast16_t my_uint_fast16_t; 1848 my_uint_fast16_t uif16 = UINT_FAST16_MAX; 1849 uif16 = UINT_FAST16_MAX; 1850 typedef uint_fast32_t my_uint_fast32_t; 1851 my_uint_fast32_t uif32 = UINT_FAST32_MAX; 1852 uif32 = UINT_FAST32_MAX; 1853 typedef uint_fast64_t my_uint_fast64_t; 1854 my_uint_fast64_t uif64 = UINT_FAST64_MAX; 1855 uif64 = UINT_FAST64_MAX; 1856 typedef uint_least8_t my_uint_least8_t; 1857 my_uint_least8_t uil8 = UINT_LEAST8_MAX; 1858 uil8 = UINT_LEAST8_MAX; 1859 typedef uint_least16_t my_uint_least16_t; 1860 my_uint_least16_t uil16 = UINT_LEAST16_MAX; 1861 uil16 = UINT_LEAST16_MAX; 1862 typedef uint_least32_t my_uint_least32_t; 1863 my_uint_least32_t uil32 = UINT_LEAST32_MAX; 1864 uil32 = UINT_LEAST32_MAX; 1865 typedef uint_least64_t my_uint_least64_t; 1866 my_uint_least64_t uil64 = UINT_LEAST64_MAX; 1867 uil64 = UINT_LEAST64_MAX; 1868 typedef uintmax_t my_uintmax_t; 1869 my_uintmax_t uim = UINTMAX_MAX; 1870 uim = UINTMAX_MAX; 1871 typedef uintptr_t my_uintptr_t; 1872 my_uintptr_t uip = UINTPTR_MAX; 1873 uip = UINTPTR_MAX; 1874 ],[glibcxx_cv_c99_stdint_tr1=yes], 1875 [glibcxx_cv_c99_stdint_tr1=no]) 1876 ]) 1877 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1) 1878 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 1879 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1, 1880 [Define if C99 types in <stdint.h> should be imported in 1881 <tr1/cstdint> in namespace std::tr1.]) 1882 fi 1883 1884 # Check for the existence of <math.h> functions. 1885 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>]) 1886 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [ 1887 AC_TRY_COMPILE([#include <math.h>], 1888 [typedef double_t my_double_t; 1889 typedef float_t my_float_t; 1890 acosh(0.0); 1891 acoshf(0.0f); 1892 acoshl(0.0l); 1893 asinh(0.0); 1894 asinhf(0.0f); 1895 asinhl(0.0l); 1896 atanh(0.0); 1897 atanhf(0.0f); 1898 atanhl(0.0l); 1899 cbrt(0.0); 1900 cbrtf(0.0f); 1901 cbrtl(0.0l); 1902 copysign(0.0, 0.0); 1903 copysignf(0.0f, 0.0f); 1904 copysignl(0.0l, 0.0l); 1905 erf(0.0); 1906 erff(0.0f); 1907 erfl(0.0l); 1908 erfc(0.0); 1909 erfcf(0.0f); 1910 erfcl(0.0l); 1911 exp2(0.0); 1912 exp2f(0.0f); 1913 exp2l(0.0l); 1914 expm1(0.0); 1915 expm1f(0.0f); 1916 expm1l(0.0l); 1917 fdim(0.0, 0.0); 1918 fdimf(0.0f, 0.0f); 1919 fdiml(0.0l, 0.0l); 1920 fma(0.0, 0.0, 0.0); 1921 fmaf(0.0f, 0.0f, 0.0f); 1922 fmal(0.0l, 0.0l, 0.0l); 1923 fmax(0.0, 0.0); 1924 fmaxf(0.0f, 0.0f); 1925 fmaxl(0.0l, 0.0l); 1926 fmin(0.0, 0.0); 1927 fminf(0.0f, 0.0f); 1928 fminl(0.0l, 0.0l); 1929 hypot(0.0, 0.0); 1930 hypotf(0.0f, 0.0f); 1931 hypotl(0.0l, 0.0l); 1932 ilogb(0.0); 1933 ilogbf(0.0f); 1934 ilogbl(0.0l); 1935 lgamma(0.0); 1936 lgammaf(0.0f); 1937 lgammal(0.0l); 1938 #ifndef __APPLE__ /* see below */ 1939 llrint(0.0); 1940 llrintf(0.0f); 1941 llrintl(0.0l); 1942 llround(0.0); 1943 llroundf(0.0f); 1944 llroundl(0.0l); 1945 #endif 1946 log1p(0.0); 1947 log1pf(0.0f); 1948 log1pl(0.0l); 1949 log2(0.0); 1950 log2f(0.0f); 1951 log2l(0.0l); 1952 logb(0.0); 1953 logbf(0.0f); 1954 logbl(0.0l); 1955 lrint(0.0); 1956 lrintf(0.0f); 1957 lrintl(0.0l); 1958 lround(0.0); 1959 lroundf(0.0f); 1960 lroundl(0.0l); 1961 nan(0); 1962 nanf(0); 1963 nanl(0); 1964 nearbyint(0.0); 1965 nearbyintf(0.0f); 1966 nearbyintl(0.0l); 1967 nextafter(0.0, 0.0); 1968 nextafterf(0.0f, 0.0f); 1969 nextafterl(0.0l, 0.0l); 1970 nexttoward(0.0, 0.0); 1971 nexttowardf(0.0f, 0.0f); 1972 nexttowardl(0.0l, 0.0l); 1973 remainder(0.0, 0.0); 1974 remainderf(0.0f, 0.0f); 1975 remainderl(0.0l, 0.0l); 1976 remquo(0.0, 0.0, 0); 1977 remquof(0.0f, 0.0f, 0); 1978 remquol(0.0l, 0.0l, 0); 1979 rint(0.0); 1980 rintf(0.0f); 1981 rintl(0.0l); 1982 round(0.0); 1983 roundf(0.0f); 1984 roundl(0.0l); 1985 scalbln(0.0, 0l); 1986 scalblnf(0.0f, 0l); 1987 scalblnl(0.0l, 0l); 1988 scalbn(0.0, 0); 1989 scalbnf(0.0f, 0); 1990 scalbnl(0.0l, 0); 1991 tgamma(0.0); 1992 tgammaf(0.0f); 1993 tgammal(0.0l); 1994 trunc(0.0); 1995 truncf(0.0f); 1996 truncl(0.0l); 1997 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no]) 1998 ]) 1999 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1) 2000 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then 2001 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1, 2002 [Define if C99 functions or macros in <math.h> should be imported 2003 in <tr1/cmath> in namespace std::tr1.]) 2004 2005 case "${target_os}" in 2006 darwin*) 2007 AC_MSG_CHECKING([for ISO C99 rounding functions in <math.h>]) 2008 AC_CACHE_VAL(glibcxx_cv_c99_math_llround, [ 2009 AC_TRY_COMPILE([#include <math.h>], 2010 [llrint(0.0); 2011 llrintf(0.0f); 2012 llrintl(0.0l); 2013 llround(0.0); 2014 llroundf(0.0f); 2015 llroundl(0.0l); 2016 ], 2017 [glibcxx_cv_c99_math_llround=yes], 2018 [glibcxx_cv_c99_math_llround=no]) 2019 ]) 2020 AC_MSG_RESULT($glibcxx_cv_c99_math_llround) 2021 ;; 2022 esac 2023 if test x"$glibcxx_cv_c99_math_llround" = x"no"; then 2024 AC_DEFINE(_GLIBCXX_NO_C99_ROUNDING_FUNCS, 1, 2025 [Define if C99 llrint and llround functions are missing from <math.h>.]) 2026 fi 2027 fi 2028 2029 # Check for the existence of <inttypes.h> functions (NB: doesn't make 2030 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1). 2031 ac_c99_inttypes_tr1=no; 2032 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 2033 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>]) 2034 AC_TRY_COMPILE([#include <inttypes.h>], 2035 [intmax_t i, numer, denom, base; 2036 const char* s; 2037 char** endptr; 2038 intmax_t ret = imaxabs(i); 2039 imaxdiv_t dret = imaxdiv(numer, denom); 2040 ret = strtoimax(s, endptr, base); 2041 uintmax_t uret = strtoumax(s, endptr, base); 2042 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no]) 2043 fi 2044 AC_MSG_RESULT($ac_c99_inttypes_tr1) 2045 if test x"$ac_c99_inttypes_tr1" = x"yes"; then 2046 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1, 2047 [Define if C99 functions in <inttypes.h> should be imported in 2048 <tr1/cinttypes> in namespace std::tr1.]) 2049 fi 2050 2051 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't 2052 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1). 2053 ac_c99_inttypes_wchar_t_tr1=no; 2054 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 2055 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>]) 2056 AC_TRY_COMPILE([#include <inttypes.h>], 2057 [intmax_t base; 2058 const wchar_t* s; 2059 wchar_t** endptr; 2060 intmax_t ret = wcstoimax(s, endptr, base); 2061 uintmax_t uret = wcstoumax(s, endptr, base); 2062 ],[ac_c99_inttypes_wchar_t_tr1=yes], 2063 [ac_c99_inttypes_wchar_t_tr1=no]) 2064 fi 2065 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1) 2066 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then 2067 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1, 2068 [Define if wchar_t C99 functions in <inttypes.h> should be 2069 imported in <tr1/cinttypes> in namespace std::tr1.]) 2070 fi 2071 2072 # Check for the existence of the <stdbool.h> header. 2073 AC_CHECK_HEADERS(stdbool.h) 2074 2075 # Check for the existence of the <stdalign.h> header. 2076 AC_CHECK_HEADERS(stdalign.h) 2077 2078 CXXFLAGS="$ac_save_CXXFLAGS" 2079 AC_LANG_RESTORE 2080]) 2081 2082dnl 2083dnl Check for uchar.h and usability. 2084dnl 2085AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [ 2086 2087 # Test uchar.h. 2088 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no) 2089 2090 AC_LANG_SAVE 2091 AC_LANG_CPLUSPLUS 2092 ac_save_CXXFLAGS="$CXXFLAGS" 2093 CXXFLAGS="$CXXFLAGS -std=c++11" 2094 2095 if test x"$ac_has_uchar_h" = x"yes"; then 2096 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>]) 2097 AC_TRY_COMPILE([#include <uchar.h> 2098 #ifdef __STDC_UTF_16__ 2099 long i = __STDC_UTF_16__; 2100 #endif 2101 #ifdef __STDC_UTF_32__ 2102 long j = __STDC_UTF_32__; 2103 #endif 2104 namespace test 2105 { 2106 using ::c16rtomb; 2107 using ::c32rtomb; 2108 using ::mbrtoc16; 2109 using ::mbrtoc32; 2110 } 2111 ], 2112 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no]) 2113 else 2114 ac_c11_uchar_cxx11=no 2115 fi 2116 AC_MSG_RESULT($ac_c11_uchar_cxx11) 2117 if test x"$ac_c11_uchar_cxx11" = x"yes"; then 2118 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1, 2119 [Define if C11 functions in <uchar.h> should be imported into 2120 namespace std in <cuchar>.]) 2121 fi 2122 2123 CXXFLAGS="$ac_save_CXXFLAGS" 2124 AC_LANG_RESTORE 2125]) 2126 2127 2128dnl 2129dnl Check whether "/dev/random" and "/dev/urandom" are available for 2130dnl class std::random_device from C++ 2011 [rand.device], and 2131dnl random_device of "TR1" (Chapter 5.1, "Random number generation"). 2132dnl 2133AC_DEFUN([GLIBCXX_CHECK_DEV_RANDOM], [ 2134 2135 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for std::random_device]) 2136 AC_CACHE_VAL(glibcxx_cv_dev_random, [ 2137 if test -r /dev/random && test -r /dev/urandom; then 2138 ## For MSys environment the test above is detected as false-positive 2139 ## on mingw-targets. So disable it explicitly for them. 2140 case ${target_os} in 2141 *mingw*) glibcxx_cv_dev_random=no ;; 2142 *) glibcxx_cv_dev_random=yes ;; 2143 esac 2144 else 2145 glibcxx_cv_dev_random=no; 2146 fi 2147 ]) 2148 AC_MSG_RESULT($glibcxx_cv_dev_random) 2149 2150 if test x"$glibcxx_cv_dev_random" = x"yes"; then 2151 AC_DEFINE(_GLIBCXX_USE_DEV_RANDOM, 1, 2152 [Define if /dev/random and /dev/urandom are available for 2153 std::random_device.]) 2154 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1, 2155 [Define if /dev/random and /dev/urandom are available for 2156 the random_device of TR1 (Chapter 5.1).]) 2157 fi 2158 2159]) 2160 2161dnl 2162dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants. 2163dnl 2164AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [ 2165 2166 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [ 2167 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]], 2168 [#include <stdio.h>], 2169 [AC_MSG_ERROR([computing EOF failed])]) 2170 ]) 2171 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof, 2172 [Define to the value of the EOF integer constant.]) 2173 2174 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [ 2175 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]], 2176 [#include <stdio.h>], 2177 [AC_MSG_ERROR([computing SEEK_CUR failed])]) 2178 ]) 2179 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur, 2180 [Define to the value of the SEEK_CUR integer constant.]) 2181 2182 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [ 2183 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]], 2184 [#include <stdio.h>], 2185 [AC_MSG_ERROR([computing SEEK_END failed])]) 2186 ]) 2187 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end, 2188 [Define to the value of the SEEK_END integer constant.]) 2189]) 2190 2191dnl 2192dnl Check whether required C++ overloads are present in <stdio.h>. 2193dnl 2194AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [ 2195 2196 AC_LANG_SAVE 2197 AC_LANG_CPLUSPLUS 2198 # Use C++11 because a conforming <stdio.h> won't define gets for C++14, 2199 # and we don't need a declaration for C++14 anyway. 2200 ac_save_CXXFLAGS="$CXXFLAGS" 2201 CXXFLAGS="$CXXFLAGS -std=gnu++11" 2202 2203 AC_MSG_CHECKING([for gets declaration]) 2204 AC_CACHE_VAL(glibcxx_cv_gets, [ 2205 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2206 [#include <stdio.h> 2207 namespace test 2208 { 2209 using ::gets; 2210 } 2211 ])], 2212 [glibcxx_cv_gets=yes], 2213 [glibcxx_cv_gets=no] 2214 )]) 2215 2216 if test $glibcxx_cv_gets = yes; then 2217 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.]) 2218 fi 2219 AC_MSG_RESULT($glibcxx_cv_gets) 2220 2221 CXXFLAGS="$ac_save_CXXFLAGS" 2222 AC_LANG_RESTORE 2223]) 2224 2225dnl 2226dnl Check whether required C++11 overloads for floating point and integral 2227dnl types are present in <math.h>. 2228dnl 2229AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [ 2230 2231 AC_LANG_SAVE 2232 AC_LANG_CPLUSPLUS 2233 ac_save_CXXFLAGS="$CXXFLAGS" 2234 CXXFLAGS="$CXXFLAGS -std=c++11" 2235 2236 case "$host" in 2237 *-*-solaris2.*) 2238 # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch 2239 # 11996[67]-02 introduced the C++11 <math.h> floating point overloads. 2240 AC_MSG_CHECKING([for C++11 <math.h> floating point overloads]) 2241 AC_CACHE_VAL(glibcxx_cv_math11_fp_overload, [ 2242 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2243 [#include <math.h> 2244 #undef isfinite 2245 namespace std { 2246 inline bool isfinite(float __x) 2247 { return __builtin_isfinite(__x); } 2248 } 2249 ])], 2250 [glibcxx_cv_math11_fp_overload=no], 2251 [glibcxx_cv_math11_fp_overload=yes] 2252 )]) 2253 2254 # autoheader cannot handle indented templates. 2255 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP], 2256 [/* Define if all C++11 floating point overloads are available in <math.h>. */ 2257#if __cplusplus >= 201103L 2258#undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP 2259#endif]) 2260 2261 if test $glibcxx_cv_math11_fp_overload = yes; then 2262 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP) 2263 fi 2264 AC_MSG_RESULT([$glibcxx_cv_math11_fp_overload]) 2265 2266 # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch 2267 # 11996[67]-02 introduced the C++11 <math.h> integral type overloads. 2268 AC_MSG_CHECKING([for C++11 <math.h> integral type overloads]) 2269 AC_CACHE_VAL(glibcxx_cv_math11_int_overload, [ 2270 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2271 [#include <math.h> 2272 namespace std { 2273 template<typename _Tp> 2274 struct __is_integer; 2275 template<> 2276 struct __is_integer<int> 2277 { 2278 enum { __value = 1 }; 2279 }; 2280 } 2281 namespace __gnu_cxx { 2282 template<bool, typename> 2283 struct __enable_if; 2284 template<typename _Tp> 2285 struct __enable_if<true, _Tp> 2286 { typedef _Tp __type; }; 2287 } 2288 namespace std { 2289 template<typename _Tp> 2290 constexpr typename __gnu_cxx::__enable_if 2291 <__is_integer<_Tp>::__value, double>::__type 2292 log2(_Tp __x) 2293 { return __builtin_log2(__x); } 2294 } 2295 int 2296 main (void) 2297 { 2298 int i = 1000; 2299 return std::log2(i); 2300 } 2301 ])], 2302 [glibcxx_cv_math11_int_overload=no], 2303 [glibcxx_cv_math11_int_overload=yes] 2304 )]) 2305 2306 # autoheader cannot handle indented templates. 2307 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT], 2308 [/* Define if all C++11 integral type overloads are available in <math.h>. */ 2309#if __cplusplus >= 201103L 2310#undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT 2311#endif]) 2312 2313 if test $glibcxx_cv_math11_int_overload = yes; then 2314 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT) 2315 fi 2316 AC_MSG_RESULT([$glibcxx_cv_math11_int_overload]) 2317 ;; 2318 *) 2319 # If <math.h> defines the obsolete isinf(double) and isnan(double) 2320 # functions (instead of or as well as the C99 generic macros) then we 2321 # can't define std::isinf(double) and std::isnan(double) in <cmath> 2322 # and must use the ones from <math.h> instead. 2323 AC_MSG_CHECKING([for obsolete isinf function in <math.h>]) 2324 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf, [ 2325 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2326 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS 2327 #include <math.h> 2328 #undef isinf 2329 namespace std { 2330 using ::isinf; 2331 bool isinf(float); 2332 bool isinf(long double); 2333 } 2334 using std::isinf; 2335 bool b = isinf(0.0); 2336 ])], 2337 [glibcxx_cv_obsolete_isinf=yes], 2338 [glibcxx_cv_obsolete_isinf=no] 2339 )]) 2340 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf]) 2341 if test $glibcxx_cv_obsolete_isinf = yes; then 2342 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1, 2343 [Define if <math.h> defines obsolete isinf function.]) 2344 fi 2345 2346 AC_MSG_CHECKING([for obsolete isnan function in <math.h>]) 2347 AC_CACHE_VAL(glibcxx_cv_obsolete_isnan, [ 2348 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2349 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS 2350 #include <math.h> 2351 #undef isnan 2352 namespace std { 2353 using ::isnan; 2354 bool isnan(float); 2355 bool isnan(long double); 2356 } 2357 using std::isnan; 2358 bool b = isnan(0.0); 2359 ])], 2360 [glibcxx_cv_obsolete_isnan=yes], 2361 [glibcxx_cv_obsolete_isnan=no] 2362 )]) 2363 AC_MSG_RESULT([$glibcxx_cv_obsolete_isnan]) 2364 if test $glibcxx_cv_obsolete_isnan = yes; then 2365 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1, 2366 [Define if <math.h> defines obsolete isnan function.]) 2367 fi 2368 ;; 2369 esac 2370 2371 CXXFLAGS="$ac_save_CXXFLAGS" 2372 AC_LANG_RESTORE 2373]) 2374 2375dnl 2376dnl Check for what type of C headers to use. 2377dnl 2378dnl --enable-cheaders= [does stuff]. 2379dnl --disable-cheaders [does not do anything, really]. 2380dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)] 2381dnl Where DEFAULT is either 'c' or 'c_global' or 'c_std'. 2382dnl 2383dnl To use the obsolete 'c_std' headers use --enable-cheaders-obsolete as 2384dnl well as --enable-cheaders=c_std, otherwise configure will fail. 2385dnl 2386AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [ 2387 GLIBCXX_ENABLE(cheaders-obsolete,no,, 2388 [allow use of obsolete "C" headers for g++]) 2389 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]], 2390 [construct "C" headers for g++], [permit c|c_global|c_std]) 2391 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders) 2392 if test $enable_cheaders = c_std ; then 2393 AC_MSG_WARN([the --enable-cheaders=c_std configuration is obsolete, c_global should be used instead]) 2394 AC_MSG_WARN([if you are unable to use c_global please report a bug or inform libstdc++@gcc.gnu.org]) 2395 if test $enable_cheaders_obsolete != yes ; then 2396 AC_MSG_ERROR(use --enable-cheaders-obsolete to use c_std "C" headers) 2397 fi 2398 fi 2399 2400 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders 2401 2402 # Allow overrides to configure.host here. 2403 if test $enable_cheaders = c_global; then 2404 c_compatibility=yes 2405 fi 2406 2407 AC_SUBST(C_INCLUDE_DIR) 2408 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c) 2409 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std) 2410 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global) 2411 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes) 2412]) 2413 2414 2415dnl 2416dnl Check for which locale library to use. The choice is mapped to 2417dnl a subdirectory of config/locale. 2418dnl 2419dnl Default is generic. 2420dnl 2421AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [ 2422 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]], 2423 [use MODEL for target locale package], 2424 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto]) 2425 2426 # Deal with gettext issues. Default to not using it (=no) until we detect 2427 # support for it later. Let the user turn it off via --e/d, but let that 2428 # default to on for easier handling. 2429 USE_NLS=no 2430 AC_ARG_ENABLE(nls, 2431 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]), 2432 [], 2433 [enable_nls=yes]) 2434 2435 # Either a known package, or "auto" 2436 if test $enable_clocale = no || test $enable_clocale = yes; then 2437 enable_clocale=auto 2438 fi 2439 enable_clocale_flag=$enable_clocale 2440 2441 # Probe for locale model to use if none specified. 2442 # Default to "generic". 2443 if test $enable_clocale_flag = auto; then 2444 case ${target_os} in 2445 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) 2446 enable_clocale_flag=gnu 2447 ;; 2448 darwin*) 2449 enable_clocale_flag=darwin 2450 ;; 2451 dragonfly* | freebsd*) 2452 enable_clocale_flag=dragonfly 2453 ;; 2454 openbsd*) 2455 enable_clocale_flag=newlib 2456 ;; 2457 *) 2458 if test x"$with_newlib" = x"yes"; then 2459 enable_clocale_flag=newlib 2460 else 2461 enable_clocale_flag=generic 2462 fi 2463 ;; 2464 esac 2465 fi 2466 2467 # Sanity check model, and test for special functionality. 2468 if test $enable_clocale_flag = gnu; then 2469 AC_EGREP_CPP([_GLIBCXX_ok], [ 2470 #include <features.h> 2471 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__) 2472 _GLIBCXX_ok 2473 #endif 2474 ], enable_clocale_flag=gnu, enable_clocale_flag=generic) 2475 2476 # Set it to scream when it hurts. 2477 ac_save_CFLAGS="$CFLAGS" 2478 CFLAGS="-Wimplicit-function-declaration -Werror" 2479 2480 # Use strxfrm_l if available. 2481 AC_TRY_COMPILE([#define _GNU_SOURCE 1 2482 #include <string.h> 2483 #include <locale.h>], 2484 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);], 2485 AC_DEFINE(HAVE_STRXFRM_L, 1, 2486 [Define if strxfrm_l is available in <string.h>.]),) 2487 2488 # Use strerror_l if available. 2489 AC_TRY_COMPILE([#define _GNU_SOURCE 1 2490 #include <string.h> 2491 #include <locale.h>], 2492 [__locale_t loc; strerror_l(5, loc);], 2493 AC_DEFINE(HAVE_STRERROR_L, 1, 2494 [Define if strerror_l is available in <string.h>.]),) 2495 2496 CFLAGS="$ac_save_CFLAGS" 2497 fi 2498 2499 # Perhaps use strerror_r if available, and strerror_l isn't. 2500 ac_save_CFLAGS="$CFLAGS" 2501 CFLAGS="-Wimplicit-function-declaration -Werror" 2502 AC_TRY_COMPILE([#define _GNU_SOURCE 1 2503 #include <string.h> 2504 #include <locale.h>], 2505 [char s[128]; strerror_r(5, s, 128);], 2506 AC_DEFINE(HAVE_STRERROR_R, 1, 2507 [Define if strerror_r is available in <string.h>.]),) 2508 CFLAGS="$ac_save_CFLAGS" 2509 2510 # Set configure bits for specified locale package 2511 AC_MSG_CHECKING([for C locale to use]) 2512 case ${enable_clocale_flag} in 2513 generic) 2514 AC_MSG_RESULT(generic) 2515 2516 CLOCALE_H=config/locale/generic/c_locale.h 2517 CLOCALE_CC=config/locale/generic/c_locale.cc 2518 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2519 CCOLLATE_CC=config/locale/generic/collate_members.cc 2520 CCTYPE_CC=config/locale/generic/ctype_members.cc 2521 CMESSAGES_H=config/locale/generic/messages_members.h 2522 CMESSAGES_CC=config/locale/generic/messages_members.cc 2523 CMONEY_CC=config/locale/generic/monetary_members.cc 2524 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2525 CTIME_H=config/locale/generic/time_members.h 2526 CTIME_CC=config/locale/generic/time_members.cc 2527 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2528 ;; 2529 darwin) 2530 AC_MSG_RESULT(darwin) 2531 2532 CLOCALE_H=config/locale/generic/c_locale.h 2533 CLOCALE_CC=config/locale/generic/c_locale.cc 2534 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2535 CCOLLATE_CC=config/locale/generic/collate_members.cc 2536 CCTYPE_CC=config/locale/darwin/ctype_members.cc 2537 CMESSAGES_H=config/locale/generic/messages_members.h 2538 CMESSAGES_CC=config/locale/generic/messages_members.cc 2539 CMONEY_CC=config/locale/generic/monetary_members.cc 2540 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2541 CTIME_H=config/locale/generic/time_members.h 2542 CTIME_CC=config/locale/generic/time_members.cc 2543 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2544 ;; 2545 2546 dragonfly) 2547 AC_MSG_RESULT(dragonfly or freebsd) 2548 2549 CLOCALE_H=config/locale/dragonfly/c_locale.h 2550 CLOCALE_CC=config/locale/dragonfly/c_locale.cc 2551 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc 2552 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc 2553 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc 2554 CMESSAGES_H=config/locale/generic/messages_members.h 2555 CMESSAGES_CC=config/locale/generic/messages_members.cc 2556 CMONEY_CC=config/locale/dragonfly/monetary_members.cc 2557 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc 2558 CTIME_H=config/locale/dragonfly/time_members.h 2559 CTIME_CC=config/locale/dragonfly/time_members.cc 2560 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2561 ;; 2562 2563 gnu) 2564 AC_MSG_RESULT(gnu) 2565 2566 # Declare intention to use gettext, and add support for specific 2567 # languages. 2568 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT 2569 ALL_LINGUAS="de fr" 2570 2571 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc. 2572 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no) 2573 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then 2574 USE_NLS=yes 2575 fi 2576 # Export the build objects. 2577 for ling in $ALL_LINGUAS; do \ 2578 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \ 2579 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \ 2580 done 2581 AC_SUBST(glibcxx_MOFILES) 2582 AC_SUBST(glibcxx_POFILES) 2583 2584 CLOCALE_H=config/locale/gnu/c_locale.h 2585 CLOCALE_CC=config/locale/gnu/c_locale.cc 2586 CCODECVT_CC=config/locale/gnu/codecvt_members.cc 2587 CCOLLATE_CC=config/locale/gnu/collate_members.cc 2588 CCTYPE_CC=config/locale/gnu/ctype_members.cc 2589 CMESSAGES_H=config/locale/gnu/messages_members.h 2590 CMESSAGES_CC=config/locale/gnu/messages_members.cc 2591 CMONEY_CC=config/locale/gnu/monetary_members.cc 2592 CNUMERIC_CC=config/locale/gnu/numeric_members.cc 2593 CTIME_H=config/locale/gnu/time_members.h 2594 CTIME_CC=config/locale/gnu/time_members.cc 2595 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h 2596 ;; 2597 ieee_1003.1-2001) 2598 AC_MSG_RESULT(IEEE 1003.1) 2599 2600 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h 2601 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc 2602 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2603 CCOLLATE_CC=config/locale/generic/collate_members.cc 2604 CCTYPE_CC=config/locale/generic/ctype_members.cc 2605 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h 2606 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc 2607 CMONEY_CC=config/locale/generic/monetary_members.cc 2608 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2609 CTIME_H=config/locale/generic/time_members.h 2610 CTIME_CC=config/locale/generic/time_members.cc 2611 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2612 ;; 2613 newlib) 2614 AC_MSG_RESULT(newlib) 2615 2616 CLOCALE_H=config/locale/generic/c_locale.h 2617 CLOCALE_CC=config/locale/generic/c_locale.cc 2618 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2619 CCOLLATE_CC=config/locale/generic/collate_members.cc 2620 CCTYPE_CC=config/locale/newlib/ctype_members.cc 2621 CMESSAGES_H=config/locale/generic/messages_members.h 2622 CMESSAGES_CC=config/locale/generic/messages_members.cc 2623 CMONEY_CC=config/locale/generic/monetary_members.cc 2624 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2625 CTIME_H=config/locale/generic/time_members.h 2626 CTIME_CC=config/locale/generic/time_members.cc 2627 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2628 ;; 2629 esac 2630 2631 # This is where the testsuite looks for locale catalogs, using the 2632 # -DLOCALEDIR define during testsuite compilation. 2633 glibcxx_localedir=${glibcxx_builddir}/po/share/locale 2634 AC_SUBST(glibcxx_localedir) 2635 2636 # A standalone libintl (e.g., GNU libintl) may be in use. 2637 if test $USE_NLS = yes; then 2638 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no) 2639 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no) 2640 fi 2641 if test $USE_NLS = yes; then 2642 AC_DEFINE(_GLIBCXX_USE_NLS, 1, 2643 [Define if NLS translations are to be used.]) 2644 fi 2645 2646 AC_SUBST(USE_NLS) 2647 AC_SUBST(CLOCALE_H) 2648 AC_SUBST(CMESSAGES_H) 2649 AC_SUBST(CCODECVT_CC) 2650 AC_SUBST(CCOLLATE_CC) 2651 AC_SUBST(CCTYPE_CC) 2652 AC_SUBST(CMESSAGES_CC) 2653 AC_SUBST(CMONEY_CC) 2654 AC_SUBST(CNUMERIC_CC) 2655 AC_SUBST(CTIME_H) 2656 AC_SUBST(CTIME_CC) 2657 AC_SUBST(CLOCALE_CC) 2658 AC_SUBST(CLOCALE_INTERNAL_H) 2659]) 2660 2661 2662dnl 2663dnl Check for which std::allocator base class to use. The choice is 2664dnl mapped from a subdirectory of include/ext. 2665dnl 2666dnl Default is new. 2667dnl 2668AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [ 2669 AC_MSG_CHECKING([for std::allocator base class]) 2670 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]], 2671 [use KIND for target std::allocator base], 2672 [permit new|malloc|mt|bitmap|pool|yes|no|auto]) 2673 2674 # If they didn't use this option switch, or if they specified --enable 2675 # with no specific model, we'll have to look for one. If they 2676 # specified --disable (???), do likewise. 2677 if test $enable_libstdcxx_allocator = no || 2678 test $enable_libstdcxx_allocator = yes; 2679 then 2680 enable_libstdcxx_allocator=auto 2681 fi 2682 2683 # Either a known package, or "auto". Auto implies the default choice 2684 # for a particular platform. 2685 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator 2686 2687 # Probe for host-specific support if no specific model is specified. 2688 # Default to "new". 2689 if test $enable_libstdcxx_allocator_flag = auto; then 2690 case ${target_os} in 2691 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) 2692 enable_libstdcxx_allocator_flag=new 2693 ;; 2694 *) 2695 enable_libstdcxx_allocator_flag=new 2696 ;; 2697 esac 2698 fi 2699 AC_MSG_RESULT($enable_libstdcxx_allocator_flag) 2700 2701 2702 # Set configure bits for specified locale package 2703 case ${enable_libstdcxx_allocator_flag} in 2704 bitmap) 2705 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h 2706 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator 2707 ;; 2708 malloc) 2709 ALLOCATOR_H=config/allocator/malloc_allocator_base.h 2710 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator 2711 ;; 2712 mt) 2713 ALLOCATOR_H=config/allocator/mt_allocator_base.h 2714 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc 2715 ;; 2716 new) 2717 ALLOCATOR_H=config/allocator/new_allocator_base.h 2718 ALLOCATOR_NAME=__gnu_cxx::new_allocator 2719 ;; 2720 pool) 2721 ALLOCATOR_H=config/allocator/pool_allocator_base.h 2722 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc 2723 ;; 2724 esac 2725 2726 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW, 2727 test $enable_libstdcxx_allocator_flag = new) 2728 AC_SUBST(ALLOCATOR_H) 2729 AC_SUBST(ALLOCATOR_NAME) 2730]) 2731 2732 2733dnl 2734dnl Check for whether the Boost-derived checks should be turned on. 2735dnl 2736dnl --enable-concept-checks turns them on. 2737dnl --disable-concept-checks leaves them off. 2738dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)] 2739dnl Where DEFAULT is either `yes' or `no'. 2740dnl 2741AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [ 2742 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks]) 2743 if test $enable_concept_checks = yes; then 2744 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1, 2745 [Define to use concept checking code from the boost libraries.]) 2746 fi 2747]) 2748 2749dnl 2750dnl Use extern templates. 2751dnl 2752dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1 2753dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0 2754 2755dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)] 2756dnl Where DEFAULT is `yes' or `no'. 2757dnl 2758AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [ 2759 2760 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template]) 2761 2762 AC_MSG_CHECKING([for extern template support]) 2763 AC_MSG_RESULT([$enable_extern_template]) 2764 2765 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes) 2766]) 2767 2768dnl 2769dnl Use vtable verification. 2770dnl 2771dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1 2772dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0 2773 2774dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)] 2775dnl Where DEFAULT is `yes' or `no'. 2776dnl 2777AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [ 2778 2779 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify]) 2780 2781 AC_MSG_CHECKING([for vtable verify support]) 2782 AC_MSG_RESULT([$enable_vtable_verify]) 2783 2784 vtv_cygmin=no 2785 if test $enable_vtable_verify = yes; then 2786 case ${target_os} in 2787 cygwin*|mingw32*) 2788 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end" 2789 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs" 2790 vtv_cygmin=yes 2791 ;; 2792 darwin*) 2793 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end" 2794 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs" 2795 ;; 2796 solaris2*) 2797 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end" 2798 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs" 2799 ;; 2800 *) 2801 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end" 2802 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs" 2803 ;; 2804 esac 2805 VTV_PCH_CXXFLAGS="-fvtable-verify=std" 2806 else 2807 VTV_CXXFLAGS= 2808 VTV_PCH_CXXFLAGS= 2809 VTV_CXXLINKFLAGS= 2810 fi 2811 2812 AC_SUBST(VTV_CXXFLAGS) 2813 AC_SUBST(VTV_PCH_CXXFLAGS) 2814 AC_SUBST(VTV_CXXLINKFLAGS) 2815 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes) 2816 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes) 2817]) 2818 2819dnl 2820dnl Check for parallel mode pre-requisites, including OpenMP support. 2821dnl 2822dnl + Usage: GLIBCXX_ENABLE_PARALLEL 2823dnl 2824AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [ 2825 2826 enable_parallel=no; 2827 2828 # See if configured libgomp/omp.h exists. (libgomp may be in 2829 # noconfigdirs but not explicitly disabled.) 2830 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then 2831 enable_parallel=yes; 2832 else 2833 AC_MSG_NOTICE([target-libgomp not built]) 2834 fi 2835 2836 AC_MSG_CHECKING([for parallel mode support]) 2837 AC_MSG_RESULT([$enable_parallel]) 2838]) 2839 2840 2841dnl 2842dnl Check for which I/O library to use: stdio and POSIX, or pure stdio. 2843dnl 2844dnl Default is stdio_posix. 2845dnl 2846AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [ 2847 AC_MSG_CHECKING([for underlying I/O to use]) 2848 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]], 2849 [use target-specific I/O package], [permit stdio|stdio_posix|stdio_pure]) 2850 2851 # The only available I/O model is based on stdio, via basic_file_stdio. 2852 # The default "stdio" is actually "stdio + POSIX" because it uses fdopen(3) 2853 # to get a file descriptor and then uses read(3) and write(3) with it. 2854 # The "stdio_pure" model doesn't use fdopen and only uses FILE* for I/O. 2855 case ${enable_cstdio} in 2856 stdio*) 2857 CSTDIO_H=config/io/c_io_stdio.h 2858 BASIC_FILE_H=config/io/basic_file_stdio.h 2859 BASIC_FILE_CC=config/io/basic_file_stdio.cc 2860 AC_MSG_RESULT(stdio) 2861 2862 if test "x$enable_cstdio" = "xstdio_pure" ; then 2863 AC_DEFINE(_GLIBCXX_USE_STDIO_PURE, 1, 2864 [Define to restrict std::__basic_file<> to stdio APIs.]) 2865 fi 2866 ;; 2867 esac 2868 2869 AC_SUBST(CSTDIO_H) 2870 AC_SUBST(BASIC_FILE_H) 2871 AC_SUBST(BASIC_FILE_CC) 2872]) 2873 2874 2875dnl 2876dnl Check for "unusual" flags to pass to the compiler while building. 2877dnl 2878dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing 2879dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc. 2880dnl --disable-cxx-flags passes nothing. 2881dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html 2882dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html 2883dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html 2884dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags) 2885dnl If "default flags" is an empty string, the effect is the same 2886dnl as --disable or --enable=no. 2887dnl 2888AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl 2889 AC_MSG_CHECKING([for extra compiler flags for building]) 2890 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS], 2891 [pass compiler FLAGS when building library], 2892 [case "x$enable_cxx_flags" in 2893 xno | x) enable_cxx_flags= ;; 2894 x-*) ;; 2895 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 2896 esac]) 2897 2898 # Run through flags (either default or command-line) and set anything 2899 # extra (e.g., #defines) that must accompany particular g++ options. 2900 if test -n "$enable_cxx_flags"; then 2901 for f in $enable_cxx_flags; do 2902 case "$f" in 2903 -fhonor-std) ;; 2904 -*) ;; 2905 *) # and we're trying to pass /what/ exactly? 2906 AC_MSG_ERROR([compiler flags start with a -]) ;; 2907 esac 2908 done 2909 fi 2910 2911 EXTRA_CXX_FLAGS="$enable_cxx_flags" 2912 AC_MSG_RESULT($EXTRA_CXX_FLAGS) 2913 AC_SUBST(EXTRA_CXX_FLAGS) 2914]) 2915 2916 2917dnl 2918dnl Check to see if debugging libraries are to be built. 2919dnl 2920dnl --enable-libstdcxx-debug 2921dnl builds a separate set of debugging libraries in addition to the 2922dnl normal (shared, static) libstdc++ binaries. 2923dnl 2924dnl --disable-libstdcxx-debug 2925dnl builds only one (non-debug) version of libstdc++. 2926dnl 2927dnl --enable-libstdcxx-debug-flags=FLAGS 2928dnl iff --enable-debug == yes, then use FLAGS to build the debug library. 2929dnl 2930dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)] 2931dnl Where DEFAULT is either `yes' or `no'. 2932dnl 2933AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [ 2934 AC_MSG_CHECKING([for additional debug build]) 2935 skip_debug_build= 2936 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library]) 2937 if test x$enable_libstdcxx_debug = xyes; then 2938 if test -f $toplevel_builddir/../stage_final \ 2939 && test -f $toplevel_builddir/../stage_current; then 2940 stage_final=`cat $toplevel_builddir/../stage_final` 2941 stage_current=`cat $toplevel_builddir/../stage_current` 2942 if test x$stage_current != x$stage_final ; then 2943 skip_debug_build=" (skipped for bootstrap stage $stage_current)" 2944 enable_libstdcxx_debug=no 2945 fi 2946 fi 2947 fi 2948 AC_MSG_RESULT($enable_libstdcxx_debug$skip_debug_build) 2949 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes) 2950]) 2951 2952 2953dnl 2954dnl Check for explicit debug flags. 2955dnl 2956dnl --enable-libstdcxx-debug-flags='-O1' 2957dnl is a general method for passing flags to be used when 2958dnl building debug libraries with --enable-libstdcxx-debug. 2959dnl 2960dnl --disable-libstdcxx-debug-flags does nothing. 2961dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags) 2962dnl If "default flags" is an empty string, the effect is the same 2963dnl as --disable or --enable=no. 2964dnl 2965AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [ 2966 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS], 2967 [pass compiler FLAGS when building debug library], 2968 [case "x$enable_libstdcxx_debug_flags" in 2969 xno | x) enable_libstdcxx_debug_flags= ;; 2970 x-*) ;; 2971 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 2972 esac]) 2973 2974 # Option parsed, now set things appropriately 2975 DEBUG_FLAGS="$enable_libstdcxx_debug_flags" 2976 AC_SUBST(DEBUG_FLAGS) 2977 2978 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS]) 2979]) 2980 2981 2982dnl 2983dnl Check if the user only wants a freestanding library implementation. 2984dnl 2985dnl --disable-hosted-libstdcxx will turn off most of the library build, 2986dnl installing only the headers required by [17.4.1.3] and the language 2987dnl support library. More than that will be built (to keep the Makefiles 2988dnl conveniently clean), but not installed. 2989dnl 2990dnl Sets: 2991dnl is_hosted (yes/no) 2992dnl 2993dnl Defines: 2994dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0) 2995dnl 2996AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [ 2997 AC_ARG_ENABLE([hosted-libstdcxx], 2998 AC_HELP_STRING([--disable-hosted-libstdcxx], 2999 [only build freestanding C++ runtime support]),, 3000 [case "$host" in 3001 arm*-*-symbianelf*) 3002 enable_hosted_libstdcxx=no 3003 ;; 3004 *) 3005 enable_hosted_libstdcxx=yes 3006 ;; 3007 esac]) 3008 if test "$enable_hosted_libstdcxx" = no; then 3009 AC_MSG_NOTICE([Only freestanding libraries will be built]) 3010 is_hosted=no 3011 hosted_define=0 3012 enable_abi_check=no 3013 enable_libstdcxx_pch=no 3014 else 3015 is_hosted=yes 3016 hosted_define=1 3017 fi 3018 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes) 3019 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define, 3020 [Define to 1 if a full hosted library is built, or 0 if freestanding.]) 3021]) 3022 3023 3024dnl 3025dnl Check if the user wants a non-verbose library implementation. 3026dnl 3027dnl --disable-libstdcxx-verbose will turn off descriptive messages to 3028dnl standard error on termination. 3029dnl 3030dnl Defines: 3031dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0) 3032dnl 3033AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [ 3034 AC_ARG_ENABLE([libstdcxx-verbose], 3035 AC_HELP_STRING([--disable-libstdcxx-verbose], 3036 [disable termination messages to standard error]),, 3037 [enable_libstdcxx_verbose=yes]) 3038 if test x"$enable_libstdcxx_verbose" = xyes; then 3039 verbose_define=1 3040 else 3041 AC_MSG_NOTICE([verbose termination messages are disabled]) 3042 verbose_define=0 3043 fi 3044 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define, 3045 [Define to 1 if a verbose library is built, or 0 otherwise.]) 3046]) 3047 3048 3049dnl 3050dnl Check for template specializations for the 'long long' type. 3051dnl The result determines only whether 'long long' I/O is enabled; things 3052dnl like numeric_limits<> specializations are always available. 3053dnl 3054dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG 3055dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined 3056dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)] 3057dnl Where DEFAULT is either `yes' or `no'. 3058dnl 3059AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [ 3060 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long']) 3061 if test $enable_long_long = yes; then 3062 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1, 3063 [Define if code specialized for long long should be used.]) 3064 fi 3065 AC_MSG_CHECKING([for enabled long long specializations]) 3066 AC_MSG_RESULT([$enable_long_long]) 3067]) 3068 3069 3070dnl 3071dnl Check for decimal floating point. 3072dnl See: 3073dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float 3074dnl 3075dnl This checks to see if the host supports decimal floating point types. 3076dnl 3077dnl Defines: 3078dnl _GLIBCXX_USE_DECIMAL_FLOAT 3079dnl 3080AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [ 3081 3082 # Fake what AC_TRY_COMPILE does, without linking as this is 3083 # unnecessary for this test. 3084 3085 cat > conftest.$ac_ext << EOF 3086[#]line __oline__ "configure" 3087int main() 3088{ 3089 _Decimal32 d1; 3090 _Decimal64 d2; 3091 _Decimal128 d3; 3092 return 0; 3093} 3094EOF 3095 3096 AC_MSG_CHECKING([for ISO/IEC TR 24733 ]) 3097 if AC_TRY_EVAL(ac_compile); then 3098 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1, 3099 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.]) 3100 enable_dfp=yes 3101 else 3102 enable_dfp=no 3103 fi 3104 AC_MSG_RESULT($enable_dfp) 3105 rm -f conftest* 3106]) 3107 3108dnl 3109dnl Check for GNU 128-bit integer and floating point types. 3110dnl 3111dnl Note: also checks that the types aren't standard types. 3112dnl 3113dnl Defines: 3114dnl _GLIBCXX_USE_INT128 3115dnl ENABLE_FLOAT128 3116dnl 3117AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [ 3118 3119 AC_LANG_SAVE 3120 AC_LANG_CPLUSPLUS 3121 3122 # Fake what AC_TRY_COMPILE does, without linking as this is 3123 # unnecessary for this test. 3124 3125 cat > conftest.$ac_ext << EOF 3126[#]line __oline__ "configure" 3127template<typename T1, typename T2> 3128 struct same 3129 { typedef T2 type; }; 3130 3131template<typename T> 3132 struct same<T, T>; 3133 3134int main() 3135{ 3136 typename same<long, __int128>::type i1; 3137 typename same<long long, __int128>::type i2; 3138} 3139EOF 3140 3141 AC_MSG_CHECKING([for __int128]) 3142 if AC_TRY_EVAL(ac_compile); then 3143 AC_DEFINE(_GLIBCXX_USE_INT128, 1, 3144 [Define if __int128 is supported on this host.]) 3145 enable_int128=yes 3146 else 3147 enable_int128=no 3148 fi 3149 AC_MSG_RESULT($enable_int128) 3150 rm -f conftest* 3151 3152 cat > conftest.$ac_ext << EOF 3153[#]line __oline__ "configure" 3154template<typename T1, typename T2> 3155 struct same 3156 { typedef T2 type; }; 3157 3158template<typename T> 3159 struct same<T, T>; 3160 3161int main() 3162{ 3163 typename same<double, __float128>::type f1; 3164 typename same<long double, __float128>::type f2; 3165} 3166EOF 3167 3168 AC_MSG_CHECKING([for __float128]) 3169 if AC_TRY_EVAL(ac_compile); then 3170 enable_float128=yes 3171 else 3172 enable_float128=no 3173 fi 3174 AC_MSG_RESULT($enable_float128) 3175 GLIBCXX_CONDITIONAL(ENABLE_FLOAT128, test $enable_float128 = yes) 3176 rm -f conftest* 3177 3178 AC_LANG_RESTORE 3179]) 3180 3181dnl 3182dnl Check for template specializations for the 'wchar_t' type. 3183dnl 3184dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T 3185dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined 3186dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)] 3187dnl Where DEFAULT is either `yes' or `no'. 3188dnl 3189dnl Necessary support must also be present. 3190dnl 3191AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [ 3192 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t']) 3193 3194 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos. 3195 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no) 3196 AC_MSG_CHECKING([for mbstate_t]) 3197 AC_TRY_COMPILE([#include <wchar.h>], 3198 [mbstate_t teststate;], 3199 have_mbstate_t=yes, have_mbstate_t=no) 3200 AC_MSG_RESULT($have_mbstate_t) 3201 if test x"$have_mbstate_t" = xyes; then 3202 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.]) 3203 fi 3204 3205 # Test it always, for use in GLIBCXX_ENABLE_C99, together with 3206 # ac_has_wchar_h. 3207 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no) 3208 3209 if test x"$enable_wchar_t" = x"yes"; then 3210 3211 AC_LANG_SAVE 3212 AC_LANG_CPLUSPLUS 3213 3214 if test x"$ac_has_wchar_h" = xyes && 3215 test x"$ac_has_wctype_h" = xyes; then 3216 AC_TRY_COMPILE([#include <wchar.h> 3217 #include <stddef.h> 3218 wint_t i; 3219 long l = WEOF; 3220 long j = WCHAR_MIN; 3221 long k = WCHAR_MAX; 3222 namespace test 3223 { 3224 using ::btowc; 3225 using ::fgetwc; 3226 using ::fgetws; 3227 using ::fputwc; 3228 using ::fputws; 3229 using ::fwide; 3230 using ::fwprintf; 3231 using ::fwscanf; 3232 using ::getwc; 3233 using ::getwchar; 3234 using ::mbrlen; 3235 using ::mbrtowc; 3236 using ::mbsinit; 3237 using ::mbsrtowcs; 3238 using ::putwc; 3239 using ::putwchar; 3240 using ::swprintf; 3241 using ::swscanf; 3242 using ::ungetwc; 3243 using ::vfwprintf; 3244 using ::vswprintf; 3245 using ::vwprintf; 3246 using ::wcrtomb; 3247 using ::wcscat; 3248 using ::wcschr; 3249 using ::wcscmp; 3250 using ::wcscoll; 3251 using ::wcscpy; 3252 using ::wcscspn; 3253 using ::wcsftime; 3254 using ::wcslen; 3255 using ::wcsncat; 3256 using ::wcsncmp; 3257 using ::wcsncpy; 3258 using ::wcspbrk; 3259 using ::wcsrchr; 3260 using ::wcsrtombs; 3261 using ::wcsspn; 3262 using ::wcsstr; 3263 using ::wcstod; 3264 using ::wcstok; 3265 using ::wcstol; 3266 using ::wcstoul; 3267 using ::wcsxfrm; 3268 using ::wctob; 3269 using ::wmemchr; 3270 using ::wmemcmp; 3271 using ::wmemcpy; 3272 using ::wmemmove; 3273 using ::wmemset; 3274 using ::wprintf; 3275 using ::wscanf; 3276 } 3277 ],[],[], [enable_wchar_t=no]) 3278 else 3279 enable_wchar_t=no 3280 fi 3281 3282 AC_LANG_RESTORE 3283 fi 3284 3285 if test x"$enable_wchar_t" = x"yes"; then 3286 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1, 3287 [Define if code specialized for wchar_t should be used.]) 3288 fi 3289 3290 AC_MSG_CHECKING([for enabled wchar_t specializations]) 3291 AC_MSG_RESULT([$enable_wchar_t]) 3292]) 3293 3294 3295dnl 3296dnl Check to see if building and using a C++ precompiled header can be done. 3297dnl 3298dnl --enable-libstdcxx-pch=yes 3299dnl default, this shows intent to use stdc++.h.gch If it looks like it 3300dnl may work, after some light-hearted attempts to puzzle out compiler 3301dnl support, flip bits on in include/Makefile.am 3302dnl 3303dnl --disable-libstdcxx-pch 3304dnl turns off attempts to use or build stdc++.h.gch. 3305dnl 3306dnl Substs: 3307dnl glibcxx_PCHFLAGS 3308dnl 3309AC_DEFUN([GLIBCXX_ENABLE_PCH], [ 3310 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers]) 3311 if test $enable_libstdcxx_pch = yes; then 3312 AC_CACHE_CHECK([for compiler with PCH support], 3313 [glibcxx_cv_prog_CXX_pch], 3314 [ac_save_CXXFLAGS="$CXXFLAGS" 3315 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated" 3316 AC_LANG_SAVE 3317 AC_LANG_CPLUSPLUS 3318 echo '#include <math.h>' > conftest.h 3319 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \ 3320 -o conftest.h.gch 1>&5 2>&1 && 3321 echo '#error "pch failed"' > conftest.h && 3322 echo '#include "conftest.h"' > conftest.cc && 3323 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ; 3324 then 3325 glibcxx_cv_prog_CXX_pch=yes 3326 else 3327 glibcxx_cv_prog_CXX_pch=no 3328 fi 3329 rm -f conftest* 3330 CXXFLAGS=$ac_save_CXXFLAGS 3331 AC_LANG_RESTORE 3332 ]) 3333 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch 3334 fi 3335 3336 AC_MSG_CHECKING([for enabled PCH]) 3337 AC_MSG_RESULT([$enable_libstdcxx_pch]) 3338 3339 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes) 3340 if test $enable_libstdcxx_pch = yes; then 3341 glibcxx_PCHFLAGS="-include bits/stdc++.h" 3342 else 3343 glibcxx_PCHFLAGS="" 3344 fi 3345 AC_SUBST(glibcxx_PCHFLAGS) 3346]) 3347 3348 3349dnl 3350dnl Check for atomic builtins. 3351dnl See: 3352dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html 3353dnl 3354dnl This checks to see if the host supports the compiler-generated 3355dnl builtins for atomic operations for various integral sizes. Note, this 3356dnl is intended to be an all-or-nothing switch, so all the atomic operations 3357dnl that are used should be checked. 3358dnl 3359dnl Note: 3360dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD. 3361dnl 3362AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [ 3363 AC_LANG_SAVE 3364 AC_LANG_CPLUSPLUS 3365 old_CXXFLAGS="$CXXFLAGS" 3366 3367 # Do link tests if possible, instead asm tests, limited to some platforms 3368 # see discussion in PR target/40134, PR libstdc++/40133 and the thread 3369 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html 3370 atomic_builtins_link_tests=no 3371 if test x$gcc_no_link != xyes; then 3372 # Can do link tests. Limit to some tested platforms 3373 case "$host" in 3374 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*) 3375 atomic_builtins_link_tests=yes 3376 ;; 3377 esac 3378 fi 3379 3380 if test x$atomic_builtins_link_tests = xyes; then 3381 3382 # Do link tests. 3383 3384 CXXFLAGS="$CXXFLAGS -fno-exceptions" 3385 3386 AC_MSG_CHECKING([for atomic builtins for bool]) 3387 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [ 3388 AC_TRY_LINK( 3389 [ ], 3390 [typedef bool atomic_type; 3391 atomic_type c1; 3392 atomic_type c2; 3393 atomic_type c3(0); 3394 // N.B. __atomic_fetch_add is not supported for bool. 3395 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3396 __ATOMIC_RELAXED); 3397 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3398 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3399 ], 3400 [glibcxx_cv_atomic_bool=yes], 3401 [glibcxx_cv_atomic_bool=no]) 3402 ]) 3403 AC_MSG_RESULT($glibcxx_cv_atomic_bool) 3404 3405 AC_MSG_CHECKING([for atomic builtins for short]) 3406 AC_CACHE_VAL(glibcxx_cv_atomic_short, [ 3407 AC_TRY_LINK( 3408 [ ], 3409 [typedef short atomic_type; 3410 atomic_type c1; 3411 atomic_type c2; 3412 atomic_type c3(0); 3413 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3414 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3415 __ATOMIC_RELAXED); 3416 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3417 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3418 ], 3419 [glibcxx_cv_atomic_short=yes], 3420 [glibcxx_cv_atomic_short=no]) 3421 ]) 3422 AC_MSG_RESULT($glibcxx_cv_atomic_short) 3423 3424 AC_MSG_CHECKING([for atomic builtins for int]) 3425 AC_CACHE_VAL(glibcxx_cv_atomic_int, [ 3426 AC_TRY_LINK( 3427 [ ], 3428 [typedef int atomic_type; 3429 atomic_type c1; 3430 atomic_type c2; 3431 atomic_type c3(0); 3432 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3433 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3434 __ATOMIC_RELAXED); 3435 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3436 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3437 ], 3438 [glibcxx_cv_atomic_int=yes], 3439 [glibcxx_cv_atomic_int=no]) 3440 ]) 3441 AC_MSG_RESULT($glibcxx_cv_atomic_int) 3442 3443 AC_MSG_CHECKING([for atomic builtins for long long]) 3444 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [ 3445 AC_TRY_LINK( 3446 [ ], 3447 [typedef long long atomic_type; 3448 atomic_type c1; 3449 atomic_type c2; 3450 atomic_type c3(0); 3451 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3452 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3453 __ATOMIC_RELAXED); 3454 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3455 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3456 ], 3457 [glibcxx_cv_atomic_long_long=yes], 3458 [glibcxx_cv_atomic_long_long=no]) 3459 ]) 3460 AC_MSG_RESULT($glibcxx_cv_atomic_long_long) 3461 3462 else 3463 3464 # Do asm tests. 3465 3466 # Compile unoptimized. 3467 CXXFLAGS='-O0 -S' 3468 3469 # Fake what AC_TRY_COMPILE does. 3470 3471 cat > conftest.$ac_ext << EOF 3472[#]line __oline__ "configure" 3473int main() 3474{ 3475 typedef bool atomic_type; 3476 atomic_type c1; 3477 atomic_type c2; 3478 atomic_type c3(0); 3479 // N.B. __atomic_fetch_add is not supported for bool. 3480 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3481 __ATOMIC_RELAXED); 3482 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3483 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3484 3485 return 0; 3486} 3487EOF 3488 3489 AC_MSG_CHECKING([for atomic builtins for bool]) 3490 if AC_TRY_EVAL(ac_compile); then 3491 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3492 glibcxx_cv_atomic_bool=no 3493 else 3494 glibcxx_cv_atomic_bool=yes 3495 fi 3496 fi 3497 AC_MSG_RESULT($glibcxx_cv_atomic_bool) 3498 rm -f conftest* 3499 3500 cat > conftest.$ac_ext << EOF 3501[#]line __oline__ "configure" 3502int main() 3503{ 3504 typedef short atomic_type; 3505 atomic_type c1; 3506 atomic_type c2; 3507 atomic_type c3(0); 3508 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3509 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3510 __ATOMIC_RELAXED); 3511 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3512 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3513 3514 return 0; 3515} 3516EOF 3517 3518 AC_MSG_CHECKING([for atomic builtins for short]) 3519 if AC_TRY_EVAL(ac_compile); then 3520 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3521 glibcxx_cv_atomic_short=no 3522 else 3523 glibcxx_cv_atomic_short=yes 3524 fi 3525 fi 3526 AC_MSG_RESULT($glibcxx_cv_atomic_short) 3527 rm -f conftest* 3528 3529 cat > conftest.$ac_ext << EOF 3530[#]line __oline__ "configure" 3531int main() 3532{ 3533 // NB: _Atomic_word not necessarily int. 3534 typedef int atomic_type; 3535 atomic_type c1; 3536 atomic_type c2; 3537 atomic_type c3(0); 3538 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3539 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3540 __ATOMIC_RELAXED); 3541 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3542 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3543 3544 return 0; 3545} 3546EOF 3547 3548 AC_MSG_CHECKING([for atomic builtins for int]) 3549 if AC_TRY_EVAL(ac_compile); then 3550 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3551 glibcxx_cv_atomic_int=no 3552 else 3553 glibcxx_cv_atomic_int=yes 3554 fi 3555 fi 3556 AC_MSG_RESULT($glibcxx_cv_atomic_int) 3557 rm -f conftest* 3558 3559 cat > conftest.$ac_ext << EOF 3560[#]line __oline__ "configure" 3561int main() 3562{ 3563 typedef long long atomic_type; 3564 atomic_type c1; 3565 atomic_type c2; 3566 atomic_type c3(0); 3567 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3568 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3569 __ATOMIC_RELAXED); 3570 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3571 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3572 3573 return 0; 3574} 3575EOF 3576 3577 AC_MSG_CHECKING([for atomic builtins for long long]) 3578 if AC_TRY_EVAL(ac_compile); then 3579 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3580 glibcxx_cv_atomic_long_long=no 3581 else 3582 glibcxx_cv_atomic_long_long=yes 3583 fi 3584 fi 3585 AC_MSG_RESULT($glibcxx_cv_atomic_long_long) 3586 rm -f conftest* 3587 3588 fi 3589 3590 CXXFLAGS="$old_CXXFLAGS" 3591 AC_LANG_RESTORE 3592 3593 # Set atomicity_dir to builtins if all but the long long test above passes, 3594 # or if the builtins were already chosen (e.g. by configure.host). 3595 if { test "$glibcxx_cv_atomic_bool" = yes \ 3596 && test "$glibcxx_cv_atomic_short" = yes \ 3597 && test "$glibcxx_cv_atomic_int" = yes; } \ 3598 || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then 3599 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1, 3600 [Define if the compiler supports C++11 atomics.]) 3601 atomicity_dir=cpu/generic/atomicity_builtins 3602 fi 3603 3604 # If still generic, set to mutex. 3605 if test $atomicity_dir = "cpu/generic" ; then 3606 atomicity_dir=cpu/generic/atomicity_mutex 3607 AC_MSG_WARN([No native atomic operations are provided for this platform.]) 3608 if test "x$target_thread_file" = xsingle; then 3609 AC_MSG_WARN([They cannot be faked when thread support is disabled.]) 3610 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.]) 3611 else 3612 AC_MSG_WARN([They will be faked using a mutex.]) 3613 AC_MSG_WARN([Performance of certain classes will degrade as a result.]) 3614 fi 3615 fi 3616 3617]) 3618 3619dnl 3620dnl Set default lock policy for synchronizing shared_ptr reference counting. 3621dnl 3622dnl --with-libstdcxx-lock-policy=auto 3623dnl Use atomic operations for shared_ptr reference counting only if 3624dnl the default target supports atomic compare-and-swap. 3625dnl --with-libstdcxx-lock-policy=atomic 3626dnl Use atomic operations for shared_ptr reference counting. 3627dnl --with-libstdcxx-lock-policy=mutex 3628dnl Use a mutex to synchronize shared_ptr reference counting. 3629dnl 3630dnl This controls the value of __gnu_cxx::__default_lock_policy, which 3631dnl determines how shared_ptr reference counts are synchronized. 3632dnl The option "atomic" means that atomic operations should be used, 3633dnl "mutex" means that a mutex will be used. The default option, "auto", 3634dnl will check if the target supports the compiler-generated builtins 3635dnl for atomic compare-and-swap operations for 2-byte and 4-byte integers, 3636dnl and will use "atomic" if supported, "mutex" otherwise. 3637dnl This option is ignored if the thread model used by GCC is "single", 3638dnl as no synchronization is used at all in that case. 3639dnl This option affects the library ABI (except in the "single" thread model). 3640dnl 3641dnl Defines _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY to 1 if atomics should be used. 3642dnl 3643AC_DEFUN([GLIBCXX_ENABLE_LOCK_POLICY], [ 3644 3645 AC_ARG_WITH([libstdcxx-lock-policy], 3646 AC_HELP_STRING([--with-libstdcxx-lock-policy={atomic,mutex,auto}], 3647 [synchronization policy for shared_ptr reference counting [default=auto]]), 3648 [libstdcxx_atomic_lock_policy=$withval], 3649 [libstdcxx_atomic_lock_policy=auto]) 3650 3651 case "$libstdcxx_atomic_lock_policy" in 3652 atomic|mutex|auto) ;; 3653 *) AC_MSG_ERROR([Invalid argument for --with-libstdcxx-lock-policy]) ;; 3654 esac 3655 AC_MSG_CHECKING([for lock policy for shared_ptr reference counts]) 3656 3657 if test x"$libstdcxx_atomic_lock_policy" = x"auto"; then 3658 AC_LANG_SAVE 3659 AC_LANG_CPLUSPLUS 3660 ac_save_CXXFLAGS="$CXXFLAGS" 3661 3662 dnl Why do we care about 2-byte CAS on targets with 4-byte _Atomic_word?! 3663 AC_TRY_COMPILE([ 3664 #if ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 3665 # error "No 2-byte compare-and-swap" 3666 #elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 3667 # error "No 4-byte compare-and-swap" 3668 #endif 3669 ],, 3670 [libstdcxx_atomic_lock_policy=atomic], 3671 [libstdcxx_atomic_lock_policy=mutex]) 3672 AC_LANG_RESTORE 3673 CXXFLAGS="$ac_save_CXXFLAGS" 3674 fi 3675 3676 if test x"$libstdcxx_atomic_lock_policy" = x"atomic"; then 3677 AC_MSG_RESULT(atomic) 3678 AC_DEFINE(HAVE_ATOMIC_LOCK_POLICY,1, 3679 [Defined if shared_ptr reference counting should use atomic operations.]) 3680 else 3681 AC_MSG_RESULT(mutex) 3682 fi 3683 3684]) 3685 3686dnl 3687dnl Allow visibility attributes to be used on namespaces, objects, etc. 3688dnl 3689dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes. 3690dnl --disable-libstdcxx-visibility turns off all use of visibility attributes. 3691dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)] 3692dnl Where DEFAULT is 'yes'. 3693dnl 3694AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [ 3695GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage]) 3696 3697if test x$enable_libstdcxx_visibility = xyes ; then 3698 dnl all hail libgfortran 3699 dnl Check whether the target supports hidden visibility. 3700 AC_CACHE_CHECK([whether the target supports hidden visibility], 3701 glibcxx_cv_have_attribute_visibility, [ 3702 save_CFLAGS="$CFLAGS" 3703 CFLAGS="$CFLAGS -Werror" 3704 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }], 3705 [], glibcxx_cv_have_attribute_visibility=yes, 3706 glibcxx_cv_have_attribute_visibility=no) 3707 CFLAGS="$save_CFLAGS"]) 3708 if test $glibcxx_cv_have_attribute_visibility = no; then 3709 enable_libstdcxx_visibility=no 3710 fi 3711fi 3712 3713GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes) 3714AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility]) 3715]) 3716 3717 3718dnl 3719dnl Add version tags to symbols in shared library (or not), additionally 3720dnl marking other symbols as private/local (or not). 3721dnl 3722dnl Sets libtool_VERSION, and determines shared library SONAME. 3723dnl 3724dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no. 3725dnl 3726dnl --enable-symvers=style adds a version script to the linker call when 3727dnl creating the shared library. The choice of version script is 3728dnl controlled by 'style'. 3729dnl --disable-symvers does not. 3730dnl 3731dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)] 3732dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to 3733dnl choose a default style based on linker characteristics. Passing 3734dnl 'no' disables versioning. 3735dnl 3736AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [ 3737 3738GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]], 3739 [enables symbol versioning of the shared library], 3740 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun]) 3741 3742# If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we 3743# don't know enough about $LD to do tricks... 3744AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES]) 3745# Sun style symbol versions needs GNU c++filt for make_sunver.pl to work 3746# with extern "C++" in version scripts. 3747AC_REQUIRE([GCC_PROG_GNU_CXXFILT]) 3748 3749# Turn a 'yes' into a suitable default. 3750if test x$enable_symvers = xyes ; then 3751 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then 3752 enable_symvers=no 3753 else 3754 if test $with_gnu_ld = yes ; then 3755 case ${target_os} in 3756 hpux*) 3757 enable_symvers=no ;; 3758 *) 3759 enable_symvers=gnu ;; 3760 esac 3761 else 3762 case ${target_os} in 3763 darwin*) 3764 enable_symvers=darwin ;; 3765 # Sun symbol versioning exists since Solaris 2.5. 3766 solaris2.[[5-9]]* | solaris2.1[[0-9]]*) 3767 # make_sunver.pl needs GNU c++filt to support extern "C++" in 3768 # version scripts, so disable symbol versioning if none can be 3769 # found. 3770 if test -z "$ac_cv_path_CXXFILT"; then 3771 AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) 3772 AC_MSG_WARN([=== no GNU c++filt could be found.]) 3773 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3774 enable_symvers=no 3775 else 3776 enable_symvers=sun 3777 fi 3778 ;; 3779 *) 3780 enable_symvers=no ;; 3781 esac 3782 fi 3783 fi 3784fi 3785 3786# Check to see if 'darwin' or 'darwin-export' can win. 3787if test x$enable_symvers = xdarwin-export ; then 3788 enable_symvers=darwin 3789fi 3790 3791# Check if 'sun' was requested on non-Solaris 2 platforms. 3792if test x$enable_symvers = xsun ; then 3793 case ${target_os} in 3794 solaris2*) 3795 # All fine. 3796 ;; 3797 *) 3798 # Unlikely to work. 3799 AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) 3800 AC_MSG_WARN([=== you are not targetting Solaris 2.]) 3801 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3802 enable_symvers=no 3803 ;; 3804 esac 3805fi 3806 3807# Check to see if 'gnu' can win. 3808if test $enable_symvers = gnu || 3809 test $enable_symvers = gnu-versioned-namespace || 3810 test $enable_symvers = sun; then 3811 # Check to see if libgcc_s exists, indicating that shared libgcc is possible. 3812 AC_MSG_CHECKING([for shared libgcc]) 3813 ac_save_CFLAGS="$CFLAGS" 3814 CFLAGS=' -lgcc_s' 3815 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no) 3816 CFLAGS="$ac_save_CFLAGS" 3817 if test $glibcxx_shared_libgcc = no; then 3818 cat > conftest.c <<EOF 3819int main (void) { return 0; } 3820EOF 3821changequote(,)dnl 3822 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ 3823 -shared -shared-libgcc -o conftest.so \ 3824 conftest.c -v 2>&1 >/dev/null \ 3825 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` 3826changequote([,])dnl 3827 rm -f conftest.c conftest.so 3828 if test x${glibcxx_libgcc_s_suffix+set} = xset; then 3829 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix" 3830 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes) 3831 CFLAGS="$ac_save_CFLAGS" 3832 fi 3833 fi 3834 AC_MSG_RESULT($glibcxx_shared_libgcc) 3835 3836 # For GNU ld, we need at least this version. The format is described in 3837 # GLIBCXX_CHECK_LINKER_FEATURES above. 3838 glibcxx_min_gnu_ld_version=21400 3839 3840 # If no shared libgcc, can't win. 3841 if test $glibcxx_shared_libgcc != yes; then 3842 AC_MSG_WARN([=== You have requested GNU symbol versioning, but]) 3843 AC_MSG_WARN([=== you are not building a shared libgcc_s.]) 3844 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3845 enable_symvers=no 3846 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then 3847 : All interesting versions of Sun ld support sun style symbol versioning. 3848 elif test $with_gnu_ld != yes ; then 3849 # just fail for now 3850 AC_MSG_WARN([=== You have requested GNU symbol versioning, but]) 3851 AC_MSG_WARN([=== you are not using the GNU linker.]) 3852 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3853 enable_symvers=no 3854 elif test $glibcxx_ld_is_gold = yes ; then 3855 : All versions of gold support symbol versioning. 3856 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then 3857 # The right tools, the right setup, but too old. Fallbacks? 3858 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for) 3859 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.) 3860 AC_MSG_WARN(=== You would need to upgrade your binutils to version) 3861 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.) 3862 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3863 enable_symvers=no 3864 fi 3865fi 3866 3867# For libtool versioning info, format is CURRENT:REVISION:AGE 3868libtool_VERSION=6:29:0 3869 3870# Everything parsed; figure out what files and settings to use. 3871case $enable_symvers in 3872 no) 3873 SYMVER_FILE=config/abi/pre/none.ver 3874 ;; 3875 gnu) 3876 SYMVER_FILE=config/abi/pre/gnu.ver 3877 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1, 3878 [Define to use GNU versioning in the shared library.]) 3879 ;; 3880 gnu-versioned-namespace) 3881 libtool_VERSION=8:0:0 3882 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver 3883 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1, 3884 [Define to use GNU namespace versioning in the shared library.]) 3885 ;; 3886 darwin) 3887 SYMVER_FILE=config/abi/pre/gnu.ver 3888 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1, 3889 [Define to use darwin versioning in the shared library.]) 3890 ;; 3891 sun) 3892 SYMVER_FILE=config/abi/pre/gnu.ver 3893 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1, 3894 [Define to use Sun versioning in the shared library.]) 3895 ;; 3896esac 3897 3898if test x$enable_symvers != xno ; then 3899 AC_DEFINE(_GLIBCXX_SYMVER, 1, 3900 [Define to use symbol versioning in the shared library.]) 3901fi 3902 3903AC_CACHE_CHECK([whether the target supports .symver directive], 3904 glibcxx_cv_have_as_symver_directive, [ 3905 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");], 3906 [], glibcxx_cv_have_as_symver_directive=yes, 3907 glibcxx_cv_have_as_symver_directive=no)]) 3908if test $glibcxx_cv_have_as_symver_directive = yes; then 3909 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1, 3910 [Define to 1 if the target assembler supports .symver directive.]) 3911fi 3912 3913AC_SUBST(SYMVER_FILE) 3914AC_SUBST(port_specific_symbol_files) 3915GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no) 3916GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu) 3917GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace) 3918GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin) 3919GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun) 3920AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers) 3921 3922if test $enable_symvers != no ; then 3923 case ${target_os} in 3924 # The Solaris 2 runtime linker doesn't support the GNU extension of 3925 # binding the same symbol to different versions 3926 solaris2*) 3927 ;; 3928 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do. 3929 *) 3930 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1, 3931 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.]) 3932 ;; 3933 esac 3934fi 3935 3936# Now, set up compatibility support, if any. 3937# In addition, need this to deal with std::size_t mangling in 3938# src/compatibility.cc. In a perfect world, could use 3939# typeid(std::size_t).name()[0] to do direct substitution. 3940AC_MSG_CHECKING([for size_t as unsigned int]) 3941ac_save_CFLAGS="$CFLAGS" 3942CFLAGS="-Werror" 3943AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;], 3944 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no]) 3945CFLAGS=$ac_save_CFLAGS 3946if test "$glibcxx_size_t_is_i" = yes; then 3947 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.]) 3948fi 3949AC_MSG_RESULT([$glibcxx_size_t_is_i]) 3950 3951AC_MSG_CHECKING([for ptrdiff_t as int]) 3952ac_save_CFLAGS="$CFLAGS" 3953CFLAGS="-Werror" 3954AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;], 3955 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no]) 3956CFLAGS=$ac_save_CFLAGS 3957if test "$glibcxx_ptrdiff_t_is_i" = yes; then 3958 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.]) 3959fi 3960AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i]) 3961]) 3962 3963 3964dnl 3965dnl Setup to use the gcc gthr.h thread-specific memory and mutex model. 3966dnl We must stage the required headers so that they will be installed 3967dnl with the library (unlike libgcc, the STL implementation is provided 3968dnl solely within headers). Since we must not inject random user-space 3969dnl macro names into user-provided C++ code, we first stage into <file>-in 3970dnl and process to <file> with an output command. The reason for a two- 3971dnl stage process here is to correctly handle $srcdir!=$objdir without 3972dnl having to write complex code (the sed commands to clean the macro 3973dnl namespace are complex and fragile enough as it is). We must also 3974dnl add a relative path so that -I- is supported properly. 3975dnl 3976dnl Substs: 3977dnl thread_header 3978dnl 3979AC_DEFUN([GLIBCXX_ENABLE_THREADS], [ 3980 AC_MSG_CHECKING([for thread model used by GCC]) 3981 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` 3982 AC_MSG_RESULT([$target_thread_file]) 3983 GCC_AC_THREAD_HEADER([$target_thread_file]) 3984]) 3985 3986 3987dnl 3988dnl Check if gthread implementation defines the types and functions 3989dnl required by the c++0x thread library. Conforming gthread 3990dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x. 3991dnl 3992dnl GLIBCXX_ENABLE_SYMVERS must be done before this. 3993dnl 3994AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [ 3995 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support]) 3996 3997 if test x$enable_libstdcxx_threads = xauto || 3998 test x$enable_libstdcxx_threads = xyes; then 3999 4000 AC_LANG_SAVE 4001 AC_LANG_CPLUSPLUS 4002 4003 ac_save_CXXFLAGS="$CXXFLAGS" 4004 CXXFLAGS="$CXXFLAGS -fno-exceptions \ 4005 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc" 4006 4007 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` 4008 case $target_thread_file in 4009 posix) 4010 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS" 4011 esac 4012 4013 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available]) 4014 4015 AC_TRY_COMPILE([#include <unistd.h>], 4016 [ 4017 // In case of POSIX threads check _POSIX_TIMEOUTS. 4018 #if (defined(_PTHREADS) \ 4019 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0)) 4020 #error 4021 #endif 4022 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0]) 4023 4024 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock, 4025 [Define to 1 if mutex_timedlock is available.]) 4026 4027 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ; 4028 else res_mutex_timedlock=no ; fi 4029 AC_MSG_RESULT([$res_mutex_timedlock]) 4030 4031 AC_MSG_CHECKING([for gthreads library]) 4032 4033 AC_TRY_COMPILE([#include "gthr.h"], 4034 [ 4035 #ifndef __GTHREADS_CXX0X 4036 #error 4037 #endif 4038 ], [ac_has_gthreads=yes], [ac_has_gthreads=no]) 4039 else 4040 ac_has_gthreads=no 4041 fi 4042 4043 AC_MSG_RESULT([$ac_has_gthreads]) 4044 4045 if test x"$ac_has_gthreads" = x"yes"; then 4046 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1, 4047 [Define if gthreads library is available.]) 4048 4049 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14 4050 # but only do so if we're using pthread in the gthread library. 4051 # On VxWorks for example, pthread_rwlock_t is defined in sys/types.h 4052 # but the pthread library is not there by default and the gthread library 4053 # does not use it. 4054 AC_TRY_COMPILE([#include "gthr.h"], 4055 [ 4056 #if (!defined(_PTHREADS)) 4057 #error 4058 #endif 4059 ], [ac_gthread_use_pthreads=yes], [ac_gthread_use_pthreads=no]) 4060 if test x"$ac_gthread_use_pthreads" = x"yes"; then 4061 AC_CHECK_TYPE([pthread_rwlock_t], 4062 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1, 4063 [Define if POSIX read/write locks are available in <gthr.h>.])], 4064 [], 4065 [#include "gthr.h"]) 4066 fi 4067 fi 4068 4069 AC_CHECK_HEADER(semaphore.h, [ 4070 AC_MSG_CHECKING([for POSIX Semaphores and sem_timedwait]) 4071 AC_TRY_COMPILE([ 4072 #include <unistd.h> 4073 #include <semaphore.h> 4074 #include <limits.h> 4075 ], 4076 [ 4077 #if !defined _POSIX_TIMEOUTS || _POSIX_TIMEOUTS <= 0 4078 # error "POSIX Timeouts option not supported" 4079 #elif !defined _POSIX_SEMAPHORES || _POSIX_SEMAPHORES <= 0 4080 # error "POSIX Semaphores option not supported" 4081 #else 4082 #if defined SEM_VALUE_MAX 4083 constexpr int sem_value_max = SEM_VALUE_MAX; 4084 #elif defined _POSIX_SEM_VALUE_MAX 4085 constexpr int sem_value_max = _POSIX_SEM_VALUE_MAX; 4086 #else 4087 # error "SEM_VALUE_MAX not available" 4088 #endif 4089 sem_t sem; 4090 sem_init(&sem, 0, sem_value_max); 4091 struct timespec ts = { 0 }; 4092 sem_timedwait(&sem, &ts); 4093 #endif 4094 ], 4095 [ac_have_posix_semaphore=yes], 4096 [ac_have_posix_semaphore=no])], 4097 [ac_have_posix_semaphore=no]) 4098 4099 if test $ac_have_posix_semaphore = yes ; then 4100 AC_DEFINE(HAVE_POSIX_SEMAPHORE, 4101 1, 4102 [Define to 1 if POSIX Semaphores with sem_timedwait are available in <semaphore.h>.]) 4103 fi 4104 AC_MSG_RESULT([$ac_have_posix_semaphore]) 4105 4106 CXXFLAGS="$ac_save_CXXFLAGS" 4107 AC_LANG_RESTORE 4108]) 4109 4110 4111# Check whether LC_MESSAGES is available in <locale.h>. 4112# Ulrich Drepper <drepper@cygnus.com>, 1995. 4113# 4114# This file file be copied and used freely without restrictions. It can 4115# be used in projects which are not available under the GNU Public License 4116# but which still want to provide support for the GNU gettext functionality. 4117# Please note that the actual code is *not* freely available. 4118AC_DEFUN([AC_LC_MESSAGES], [ 4119 AC_CHECK_HEADER(locale.h, [ 4120 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES, 4121 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES], 4122 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)]) 4123 if test $ac_cv_val_LC_MESSAGES = yes; then 4124 AC_DEFINE(HAVE_LC_MESSAGES, 1, 4125 [Define if LC_MESSAGES is available in <locale.h>.]) 4126 fi 4127 ]) 4128]) 4129 4130dnl 4131dnl Check whether rdrand is supported in the assembler. 4132AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [ 4133 AC_MSG_CHECKING([for rdrand support in assembler]) 4134 AC_CACHE_VAL(ac_cv_x86_rdrand, [ 4135 ac_cv_x86_rdrand=no 4136 case "$target" in 4137 i?86-*-* | \ 4138 x86_64-*-*) 4139 AC_TRY_COMPILE(, [asm("rdrand %eax");], 4140 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no]) 4141 esac 4142 ]) 4143 if test $ac_cv_x86_rdrand = yes; then 4144 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1, 4145 [ Defined if as can handle rdrand. ]) 4146 fi 4147 AC_MSG_RESULT($ac_cv_x86_rdrand) 4148]) 4149 4150dnl 4151dnl Check whether rdseed is supported in the assembler. 4152AC_DEFUN([GLIBCXX_CHECK_X86_RDSEED], [ 4153 AC_MSG_CHECKING([for rdseed support in assembler]) 4154 AC_CACHE_VAL(ac_cv_x86_rdseed, [ 4155 ac_cv_x86_rdseed=no 4156 case "$target" in 4157 i?86-*-* | \ 4158 x86_64-*-*) 4159 AC_TRY_COMPILE(, [asm("rdseed %eax");], 4160 [ac_cv_x86_rdseed=yes], [ac_cv_x86_rdseed=no]) 4161 esac 4162 ]) 4163 if test $ac_cv_x86_rdseed = yes; then 4164 AC_DEFINE(_GLIBCXX_X86_RDSEED, 1, 4165 [ Defined if as can handle rdseed. ]) 4166 fi 4167 AC_MSG_RESULT($ac_cv_x86_rdseed) 4168]) 4169 4170dnl 4171dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS. 4172dnl 4173AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [ 4174 4175 AC_LANG_SAVE 4176 AC_LANG_CPLUSPLUS 4177 ac_save_CXXFLAGS="$CXXFLAGS" 4178 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4179 4180 AC_MSG_CHECKING([for get_nprocs]) 4181 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [ 4182 GCC_TRY_COMPILE_OR_LINK( 4183 [#include <sys/sysinfo.h>], 4184 [int n = get_nprocs();], 4185 [glibcxx_cv_GET_NPROCS=yes], 4186 [glibcxx_cv_GET_NPROCS=no]) 4187 ]) 4188 if test $glibcxx_cv_GET_NPROCS = yes; then 4189 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.]) 4190 fi 4191 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS) 4192 4193 CXXFLAGS="$ac_save_CXXFLAGS" 4194 AC_LANG_RESTORE 4195]) 4196 4197dnl 4198dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN. 4199dnl 4200AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [ 4201 4202 AC_LANG_SAVE 4203 AC_LANG_CPLUSPLUS 4204 ac_save_CXXFLAGS="$CXXFLAGS" 4205 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4206 4207 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN]) 4208 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [ 4209 GCC_TRY_COMPILE_OR_LINK( 4210 [#include <unistd.h>], 4211 [int n = sysconf(_SC_NPROCESSORS_ONLN);], 4212 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes], 4213 [glibcxx_cv_SC_NPROCESSORS_ONLN=no]) 4214 ]) 4215 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then 4216 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.]) 4217 fi 4218 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN) 4219 4220 CXXFLAGS="$ac_save_CXXFLAGS" 4221 AC_LANG_RESTORE 4222]) 4223 4224dnl 4225dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN. 4226dnl 4227AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [ 4228 4229 AC_LANG_SAVE 4230 AC_LANG_CPLUSPLUS 4231 ac_save_CXXFLAGS="$CXXFLAGS" 4232 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4233 4234 AC_MSG_CHECKING([for _SC_NPROC_ONLN]) 4235 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [ 4236 GCC_TRY_COMPILE_OR_LINK( 4237 [#include <unistd.h>], 4238 [int n = sysconf(_SC_NPROC_ONLN);], 4239 [glibcxx_cv_SC_NPROC_ONLN=yes], 4240 [glibcxx_cv_SC_NPROC_ONLN=no]) 4241 ]) 4242 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then 4243 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.]) 4244 fi 4245 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN) 4246 4247 CXXFLAGS="$ac_save_CXXFLAGS" 4248 AC_LANG_RESTORE 4249]) 4250 4251dnl 4252dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP. 4253dnl 4254AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [ 4255 4256 AC_LANG_SAVE 4257 AC_LANG_CPLUSPLUS 4258 ac_save_CXXFLAGS="$CXXFLAGS" 4259 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4260 4261 AC_MSG_CHECKING([for pthreads_num_processors_np]) 4262 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [ 4263 GCC_TRY_COMPILE_OR_LINK( 4264 [#include <pthread.h>], 4265 [int n = pthread_num_processors_np();], 4266 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes], 4267 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no]) 4268 ]) 4269 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then 4270 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.]) 4271 fi 4272 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP) 4273 4274 CXXFLAGS="$ac_save_CXXFLAGS" 4275 AC_LANG_RESTORE 4276]) 4277 4278dnl 4279dnl Check whether pthread_cond_clockwait is available in <pthread.h> for std::condition_variable to use, 4280dnl and define _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT. 4281dnl 4282AC_DEFUN([GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT], [ 4283 4284 AC_LANG_SAVE 4285 AC_LANG_CPLUSPLUS 4286 ac_save_CXXFLAGS="$CXXFLAGS" 4287 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4288 ac_save_LIBS="$LIBS" 4289 LIBS="$LIBS -lpthread" 4290 4291 AC_MSG_CHECKING([for pthread_cond_clockwait]) 4292 AC_CACHE_VAL(glibcxx_cv_PTHREAD_COND_CLOCKWAIT, [ 4293 GCC_TRY_COMPILE_OR_LINK( 4294 [#include <pthread.h>], 4295 [pthread_mutex_t mutex; pthread_cond_t cond; struct timespec ts; int n = pthread_cond_clockwait(&cond, &mutex, 0, &ts);], 4296 [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=yes], 4297 [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=no]) 4298 ]) 4299 if test $glibcxx_cv_PTHREAD_COND_CLOCKWAIT = yes; then 4300 AC_DEFINE(_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT, 1, [Define if pthread_cond_clockwait is available in <pthread.h>.]) 4301 fi 4302 AC_MSG_RESULT($glibcxx_cv_PTHREAD_COND_CLOCKWAIT) 4303 4304 CXXFLAGS="$ac_save_CXXFLAGS" 4305 LIBS="$ac_save_LIBS" 4306 AC_LANG_RESTORE 4307]) 4308 4309dnl 4310dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use, 4311dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK. 4312dnl 4313AC_DEFUN([GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK], [ 4314 4315 AC_LANG_SAVE 4316 AC_LANG_CPLUSPLUS 4317 ac_save_CXXFLAGS="$CXXFLAGS" 4318 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4319 ac_save_LIBS="$LIBS" 4320 LIBS="$LIBS -lpthread" 4321 4322 AC_MSG_CHECKING([for pthread_mutex_clocklock]) 4323 AC_CACHE_VAL(glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK, [ 4324 GCC_TRY_COMPILE_OR_LINK( 4325 [#include <pthread.h>], 4326 [pthread_mutex_t mutex; struct timespec ts; int n = pthread_mutex_clocklock(&mutex, CLOCK_REALTIME, &ts);], 4327 [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=yes], 4328 [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=no]) 4329 ]) 4330 if test $glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK = yes; then 4331 AC_DEFINE(_GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK, 1, [Define if pthread_mutex_clocklock is available in <pthread.h>.]) 4332 fi 4333 AC_MSG_RESULT($glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK) 4334 4335 CXXFLAGS="$ac_save_CXXFLAGS" 4336 LIBS="$ac_save_LIBS" 4337 AC_LANG_RESTORE 4338]) 4339 4340dnl 4341dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use, 4342dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK. 4343dnl 4344AC_DEFUN([GLIBCXX_CHECK_PTHREAD_RWLOCK_CLOCKLOCK], [ 4345 4346 AC_LANG_SAVE 4347 AC_LANG_CPLUSPLUS 4348 ac_save_CXXFLAGS="$CXXFLAGS" 4349 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4350 ac_save_LIBS="$LIBS" 4351 LIBS="$LIBS -lpthread" 4352 4353 AC_MSG_CHECKING([for pthread_rwlock_clockrdlock, pthread_wlock_clockwrlock]) 4354 AC_CACHE_VAL(glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK, [ 4355 GCC_TRY_COMPILE_OR_LINK( 4356 [#include <pthread.h>], 4357 [pthread_rwlock_t rwl; struct timespec ts;] 4358 [int n = pthread_rwlock_clockrdlock(&rwl, CLOCK_REALTIME, &ts);] 4359 [int m = pthread_rwlock_clockwrlock(&rwl, CLOCK_REALTIME, &ts);], 4360 [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=yes], 4361 [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=no]) 4362 ]) 4363 if test $glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK = yes; then 4364 AC_DEFINE(_GLIBCXX_USE_PTHREAD_RWLOCK_CLOCKLOCK, 1, [Define if pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock are available in <pthread.h>.]) 4365 fi 4366 AC_MSG_RESULT($glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK) 4367 4368 CXXFLAGS="$ac_save_CXXFLAGS" 4369 LIBS="$ac_save_LIBS" 4370 AC_LANG_RESTORE 4371]) 4372 4373dnl 4374dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU. 4375dnl 4376AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [ 4377 4378 AC_LANG_SAVE 4379 AC_LANG_CPLUSPLUS 4380 ac_save_CXXFLAGS="$CXXFLAGS" 4381 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4382 4383 AC_MSG_CHECKING([for hw.ncpu sysctl]) 4384 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [ 4385 GCC_TRY_COMPILE_OR_LINK( 4386 [ 4387 #include <stddef.h> 4388 #include <sys/sysctl.h> 4389 ], 4390 [ 4391 int count; 4392 size_t size = sizeof(count); 4393 int mib[] = { CTL_HW, HW_NCPU }; 4394 sysctl(mib, 2, &count, &size, NULL, 0); 4395 ], 4396 [glibcxx_cv_SYSCTL_HW_NCPU=yes], 4397 [glibcxx_cv_SYSCTL_HW_NCPU=no]) 4398 ]) 4399 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then 4400 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.]) 4401 fi 4402 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU) 4403 4404 CXXFLAGS="$ac_save_CXXFLAGS" 4405 AC_LANG_RESTORE 4406]) 4407 4408dnl 4409dnl Check to see if python pretty printing can be activated. 4410dnl 4411dnl --with-python-dir=dir 4412dnl installs directory into $prefix/dir 4413AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [ 4414 4415AC_MSG_CHECKING([for custom python install directory]) 4416AC_ARG_WITH([python-dir], 4417 AS_HELP_STRING([--with-python-dir], 4418 [the location to install Python modules. This path is relative starting from the prefix.]), 4419 [with_python_dir=$withval], [with_python_dir="no"]) 4420AC_MSG_RESULT(${with_python_dir}) 4421 4422# Needed for installing Python modules during make install. 4423python_mod_dir="${with_python_dir}" 4424AC_SUBST(python_mod_dir) 4425GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no) 4426]) 4427 4428dnl 4429dnl Check to see if -Werror is disabled. 4430dnl 4431dnl --enable-werror/--disable-werror 4432AC_DEFUN([GLIBCXX_ENABLE_WERROR], [ 4433 AC_MSG_CHECKING([for -Werror]) 4434 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror]) 4435 AC_MSG_RESULT($enable_werror) 4436 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes) 4437]) 4438 4439dnl 4440dnl Check whether obsolescent tmpnam is available in <stdio.h>, 4441dnl and define _GLIBCXX_USE_TMPNAM. 4442dnl 4443AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl 4444dnl 4445 AC_LANG_SAVE 4446 AC_LANG_CPLUSPLUS 4447 ac_save_CXXFLAGS="$CXXFLAGS" 4448 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4449dnl 4450 AC_MSG_CHECKING([for tmpnam]) 4451 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl 4452 GCC_TRY_COMPILE_OR_LINK( 4453 [#include <stdio.h>], 4454 [char *tmp = tmpnam(NULL);], 4455 [glibcxx_cv_TMPNAM=yes], 4456 [glibcxx_cv_TMPNAM=no]) 4457 ]) 4458 if test $glibcxx_cv_TMPNAM = yes; then 4459 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.]) 4460 fi 4461 AC_MSG_RESULT($glibcxx_cv_TMPNAM) 4462dnl 4463 CXXFLAGS="$ac_save_CXXFLAGS" 4464 AC_LANG_RESTORE 4465]) 4466 4467dnl 4468dnl Check to see if sys/sdt.h exists and that it is suitable for use. 4469dnl Some versions of sdt.h were not compatible with C++11. 4470dnl 4471AC_DEFUN([GLIBCXX_CHECK_SDT_H], [ 4472 AC_MSG_CHECKING([for suitable sys/sdt.h]) 4473 # Note that this test has to be run with the C language. 4474 # Otherwise, sdt.h will try to include some headers from 4475 # libstdc++ itself. 4476 AC_LANG_SAVE 4477 AC_LANG_C 4478 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [ 4479 # Because we have to run the test in C, we use grep rather 4480 # than the compiler to check for the bug. The bug is that 4481 # were strings without trailing whitespace, causing g++ 4482 # to look for operator"". The pattern searches for the fixed 4483 # output. 4484 AC_EGREP_CPP([ \",\" ], [ 4485 #include <sys/sdt.h> 4486 int f() { STAP_PROBE(hi, bob); } 4487 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no]) 4488 ]) 4489 AC_LANG_RESTORE 4490 if test $glibcxx_cv_sys_sdt_h = yes; then 4491 AC_DEFINE(HAVE_SYS_SDT_H, 1, 4492 [Define to 1 if you have a suitable <sys/sdt.h> header file]) 4493 fi 4494 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h) 4495]) 4496 4497dnl 4498dnl Control whether the library should define symbols for old and new ABIs. 4499dnl This affects definitions of strings, stringstreams and locale facets. 4500dnl 4501dnl --disable-libstdcxx-dual-abi will use old ABI for all types. 4502dnl 4503dnl Defines: 4504dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0) 4505dnl 4506AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [ 4507 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string]) 4508 if test x$enable_symvers = xgnu-versioned-namespace; then 4509 # gnu-versioned-namespace is incompatible with the dual ABI. 4510 enable_libstdcxx_dual_abi="no" 4511 fi 4512 if test x"$enable_libstdcxx_dual_abi" != xyes; then 4513 AC_MSG_NOTICE([dual ABI is disabled]) 4514 default_libstdcxx_abi="gcc4-compatible" 4515 fi 4516 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes) 4517]) 4518 4519dnl 4520dnl Check to see which ABI should be enabled by default. 4521dnl 4522dnl --with-default-libstdcxx-abi={gcc4-compatible,new} 4523dnl 4524dnl Defines: 4525dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0) 4526dnl 4527AC_DEFUN([GLIBCXX_DEFAULT_ABI], [ 4528 if test x$enable_libstdcxx_dual_abi = xyes; then 4529 AC_MSG_CHECKING([for default std::string ABI to use]) 4530 AC_ARG_WITH([default-libstdcxx-abi], 4531 AS_HELP_STRING([--with-default-libstdcxx-abi], 4532 [set the std::string ABI to use by default]), 4533 [case "$withval" in 4534 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;; 4535 new|cxx11) default_libstdcxx_abi="new" ;; 4536 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;; 4537 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;; 4538 esac 4539 ], 4540 [default_libstdcxx_abi="new"]) 4541 AC_MSG_RESULT(${default_libstdcxx_abi}) 4542 fi 4543 if test $default_libstdcxx_abi = "new"; then 4544 glibcxx_cxx11_abi=1 4545 glibcxx_cxx98_abi=0 4546 else 4547 glibcxx_cxx11_abi=0 4548 glibcxx_cxx98_abi=1 4549 fi 4550 AC_SUBST(glibcxx_cxx98_abi) 4551 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1) 4552]) 4553 4554dnl 4555dnl Check to see whether to build libstdc++fs.a 4556dnl 4557dnl --enable-libstdcxx-filesystem-ts 4558dnl 4559AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [ 4560 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,, 4561 [turns on ISO/IEC TS 18822 support], 4562 [permit yes|no|auto]) 4563 4564 AC_MSG_CHECKING([whether to build Filesystem TS support]) 4565 if test x"$ac_cv_header_dirent_h" != x"yes"; then 4566 enable_libstdcxx_filesystem_ts=no 4567 fi 4568 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then 4569 case "${target_os}" in 4570 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*) 4571 enable_libstdcxx_filesystem_ts=yes 4572 ;; 4573 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu | uclinux*) 4574 enable_libstdcxx_filesystem_ts=yes 4575 ;; 4576 rtems*) 4577 enable_libstdcxx_filesystem_ts=yes 4578 ;; 4579 solaris*) 4580 enable_libstdcxx_filesystem_ts=yes 4581 ;; 4582 mingw*) 4583 enable_libstdcxx_filesystem_ts=yes 4584 ;; 4585 *) 4586 enable_libstdcxx_filesystem_ts=no 4587 ;; 4588 esac 4589 fi 4590 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts) 4591 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes) 4592]) 4593 4594dnl 4595dnl Check whether the library calls required by the C++17 Filesystem library 4596dnl and the Filesystem TS are present. 4597dnl Defines: 4598dnl HAVE_STRUCT_DIRENT_D_TYPE 4599dnl _GLIBCXX_USE_REALPATH 4600dnl _GLIBCXX_USE_UTIMENSAT 4601dnl _GLIBCXX_USE_ST_MTIM 4602dnl _GLIBCXX_USE_FCHMOD 4603dnl _GLIBCXX_USE_FCHMODAT 4604dnl _GLIBCXX_USE_SENDFILE 4605dnl HAVE_LINK 4606dnl HAVE_READLINK 4607dnl HAVE_SYMLINK 4608dnl 4609AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl 4610dnl 4611 AC_LANG_SAVE 4612 AC_LANG_CPLUSPLUS 4613 ac_save_CXXFLAGS="$CXXFLAGS" 4614 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4615dnl 4616 AC_MSG_CHECKING([for struct dirent.d_type]) 4617 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl 4618 GCC_TRY_COMPILE_OR_LINK( 4619 [#include <dirent.h>], 4620 [ 4621 struct dirent d; 4622 if (sizeof d.d_type) return 0; 4623 ], 4624 [glibcxx_cv_dirent_d_type=yes], 4625 [glibcxx_cv_dirent_d_type=no]) 4626 ]) 4627 if test $glibcxx_cv_dirent_d_type = yes; then 4628 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.]) 4629 fi 4630 AC_MSG_RESULT($glibcxx_cv_dirent_d_type) 4631dnl 4632 AC_MSG_CHECKING([for realpath]) 4633 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl 4634 GCC_TRY_COMPILE_OR_LINK( 4635 [ 4636 #include <limits.h> 4637 #include <stdlib.h> 4638 #include <unistd.h> 4639 ], 4640 [ 4641 #if _XOPEN_VERSION < 500 4642 #error 4643 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX) 4644 char *tmp = realpath((const char*)NULL, (char*)NULL); 4645 #else 4646 #error 4647 #endif 4648 ], 4649 [glibcxx_cv_realpath=yes], 4650 [glibcxx_cv_realpath=no]) 4651 ]) 4652 if test $glibcxx_cv_realpath = yes; then 4653 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.]) 4654 fi 4655 AC_MSG_RESULT($glibcxx_cv_realpath) 4656dnl 4657 AC_MSG_CHECKING([for utimensat]) 4658 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl 4659 GCC_TRY_COMPILE_OR_LINK( 4660 [ 4661 #include <fcntl.h> 4662 #include <sys/stat.h> 4663 ], 4664 [ 4665 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } }; 4666 int i = utimensat(AT_FDCWD, "path", ts, 0); 4667 ], 4668 [glibcxx_cv_utimensat=yes], 4669 [glibcxx_cv_utimensat=no]) 4670 ]) 4671 if test $glibcxx_cv_utimensat = yes; then 4672 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.]) 4673 fi 4674 AC_MSG_RESULT($glibcxx_cv_utimensat) 4675dnl 4676 AC_MSG_CHECKING([for utime]) 4677 AC_CACHE_VAL(glibcxx_cv_utime, [dnl 4678 GCC_TRY_COMPILE_OR_LINK( 4679 [ 4680 #include <utime.h> 4681 ], 4682 [ 4683 struct utimbuf t = { 1, 1 }; 4684 int i = utime("path", &t); 4685 ], 4686 [glibcxx_cv_utime=yes], 4687 [glibcxx_cv_utime=no]) 4688 ]) 4689 if test $glibcxx_cv_utime = yes; then 4690 AC_DEFINE(_GLIBCXX_USE_UTIME, 1, [Define if utime is available in <utime.h>.]) 4691 fi 4692 AC_MSG_RESULT($glibcxx_cv_utime) 4693dnl 4694 AC_MSG_CHECKING([for lstat]) 4695 AC_CACHE_VAL(glibcxx_cv_lstat, [dnl 4696 GCC_TRY_COMPILE_OR_LINK( 4697 [ #include <sys/stat.h> ], 4698 [ 4699 struct stat st; 4700 int i = lstat("path", &st); 4701 ], 4702 [glibcxx_cv_lstat=yes], 4703 [glibcxx_cv_lstat=no]) 4704 ]) 4705 if test $glibcxx_cv_lstat = yes; then 4706 AC_DEFINE(_GLIBCXX_USE_LSTAT, 1, [Define if lstat is available in <sys/stat.h>.]) 4707 fi 4708 AC_MSG_RESULT($glibcxx_cv_lstat) 4709dnl 4710 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec]) 4711 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl 4712 GCC_TRY_COMPILE_OR_LINK( 4713 [ #include <sys/stat.h> ], 4714 [ 4715 struct stat st; 4716 return st.st_mtim.tv_nsec; 4717 ], 4718 [glibcxx_cv_st_mtim=yes], 4719 [glibcxx_cv_st_mtim=no]) 4720 ]) 4721 if test $glibcxx_cv_st_mtim = yes; then 4722 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.]) 4723 fi 4724 AC_MSG_RESULT($glibcxx_cv_st_mtim) 4725dnl 4726 AC_MSG_CHECKING([for fchmod]) 4727 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl 4728 GCC_TRY_COMPILE_OR_LINK( 4729 [#include <sys/stat.h>], 4730 [fchmod(1, S_IWUSR);], 4731 [glibcxx_cv_fchmod=yes], 4732 [glibcxx_cv_fchmod=no]) 4733 ]) 4734 if test $glibcxx_cv_fchmod = yes; then 4735 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.]) 4736 fi 4737 AC_MSG_RESULT($glibcxx_cv_fchmod) 4738dnl 4739 AC_MSG_CHECKING([for fchmodat]) 4740 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl 4741 GCC_TRY_COMPILE_OR_LINK( 4742 [ 4743 #include <fcntl.h> 4744 #include <sys/stat.h> 4745 ], 4746 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);], 4747 [glibcxx_cv_fchmodat=yes], 4748 [glibcxx_cv_fchmodat=no]) 4749 ]) 4750 if test $glibcxx_cv_fchmodat = yes; then 4751 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.]) 4752 fi 4753 AC_MSG_RESULT($glibcxx_cv_fchmodat) 4754dnl 4755 AC_MSG_CHECKING([for sendfile that can copy files]) 4756 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl 4757 case "${target_os}" in 4758 gnu* | linux* | solaris* | uclinux*) 4759 GCC_TRY_COMPILE_OR_LINK( 4760 [#include <sys/sendfile.h>], 4761 [sendfile(1, 2, (off_t*)0, sizeof 1);], 4762 [glibcxx_cv_sendfile=yes], 4763 [glibcxx_cv_sendfile=no]) 4764 ;; 4765 *) 4766 glibcxx_cv_sendfile=no 4767 ;; 4768 esac 4769 ]) 4770 if test $glibcxx_cv_sendfile = yes; then 4771 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.]) 4772 fi 4773 AC_MSG_RESULT($glibcxx_cv_sendfile) 4774dnl 4775 AC_MSG_CHECKING([for link]) 4776 AC_CACHE_VAL(glibcxx_cv_link, [dnl 4777 GCC_TRY_COMPILE_OR_LINK( 4778 [#include <unistd.h>], 4779 [link("", "");], 4780 [glibcxx_cv_link=yes], 4781 [glibcxx_cv_link=no]) 4782 ]) 4783 if test $glibcxx_cv_link = yes; then 4784 AC_DEFINE(HAVE_LINK, 1, [Define if link is available in <unistd.h>.]) 4785 fi 4786 AC_MSG_RESULT($glibcxx_cv_link) 4787dnl 4788 AC_MSG_CHECKING([for readlink]) 4789 AC_CACHE_VAL(glibcxx_cv_readlink, [dnl 4790 GCC_TRY_COMPILE_OR_LINK( 4791 [#include <unistd.h>], 4792 [char buf[32]; readlink("", buf, sizeof(buf));], 4793 [glibcxx_cv_readlink=yes], 4794 [glibcxx_cv_readlink=no]) 4795 ]) 4796 if test $glibcxx_cv_readlink = yes; then 4797 AC_DEFINE(HAVE_READLINK, 1, [Define if readlink is available in <unistd.h>.]) 4798 fi 4799 AC_MSG_RESULT($glibcxx_cv_readlink) 4800dnl 4801 AC_MSG_CHECKING([for symlink]) 4802 AC_CACHE_VAL(glibcxx_cv_symlink, [dnl 4803 GCC_TRY_COMPILE_OR_LINK( 4804 [#include <unistd.h>], 4805 [symlink("", "");], 4806 [glibcxx_cv_symlink=yes], 4807 [glibcxx_cv_symlink=no]) 4808 ]) 4809 if test $glibcxx_cv_symlink = yes; then 4810 AC_DEFINE(HAVE_SYMLINK, 1, [Define if symlink is available in <unistd.h>.]) 4811 fi 4812 AC_MSG_RESULT($glibcxx_cv_symlink) 4813dnl 4814 AC_MSG_CHECKING([for truncate]) 4815 AC_CACHE_VAL(glibcxx_cv_truncate, [dnl 4816 GCC_TRY_COMPILE_OR_LINK( 4817 [#include <unistd.h>], 4818 [truncate("", 99);], 4819 [glibcxx_cv_truncate=yes], 4820 [glibcxx_cv_truncate=no]) 4821 ]) 4822 if test $glibcxx_cv_truncate = yes; then 4823 AC_DEFINE(HAVE_TRUNCATE, 1, [Define if truncate is available in <unistd.h>.]) 4824 fi 4825 AC_MSG_RESULT($glibcxx_cv_truncate) 4826dnl 4827 CXXFLAGS="$ac_save_CXXFLAGS" 4828 AC_LANG_RESTORE 4829]) 4830 4831dnl 4832dnl Check how size_t is mangled. Copied from libitm. 4833dnl 4834AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [ 4835 AC_CACHE_CHECK([how size_t is mangled], 4836 glibcxx_cv_size_t_mangling, [ 4837 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;], 4838 [glibcxx_cv_size_t_mangling=m], [ 4839 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;], 4840 [glibcxx_cv_size_t_mangling=j], [ 4841 AC_TRY_COMPILE([], 4842 [extern __SIZE_TYPE__ x; extern unsigned long long x;], 4843 [glibcxx_cv_size_t_mangling=y], [ 4844 AC_TRY_COMPILE([], 4845 [extern __SIZE_TYPE__ x; extern unsigned short x;], 4846 [glibcxx_cv_size_t_mangling=t], [ 4847 AC_TRY_COMPILE([], 4848 [extern __SIZE_TYPE__ x; extern __int20 unsigned x;], 4849 [glibcxx_cv_size_t_mangling=u6uint20], 4850 [glibcxx_cv_size_t_mangling=x]) 4851 ]) 4852 ]) 4853 ]) 4854 ]) 4855 ]) 4856 if test $glibcxx_cv_size_t_mangling = x; then 4857 AC_MSG_ERROR([Unknown underlying type for size_t]) 4858 fi 4859 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling], 4860 [Define to the letter to which size_t is mangled.]) 4861]) 4862 4863dnl 4864dnl Determine whether std::exception_ptr symbols should be exported with 4865dnl the symbol versions from GCC 4.6.0 or GCC 7.1.0, depending on which 4866dnl release first added support for std::exception_ptr. Originally it was 4867dnl only supported for targets with always-lock-free atomics for int, but 4868dnl since GCC 7.1 it is supported for all targets. 4869dnl 4870AC_DEFUN([GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER], [ 4871 if test $enable_symvers != no; then 4872 AC_MSG_CHECKING([for first version to support std::exception_ptr]) 4873 case ${target} in 4874 aarch64-*-* | alpha-*-* | hppa*-*-* | i?86-*-* | x86_64-*-* | \ 4875 m68k-*-* | powerpc*-*-* | s390*-*-* | *-*-solaris* ) 4876 ac_exception_ptr_since_gcc46=yes 4877 ;; 4878 *) 4879 # If the value of this macro changes then we will need to hardcode 4880 # yes/no here for additional targets based on the original value. 4881 AC_TRY_COMPILE([], [ 4882 #if __GCC_ATOMIC_INT_LOCK_FREE <= 1 4883 # error atomic int not always lock free 4884 #endif 4885 ], 4886 [ac_exception_ptr_since_gcc46=yes], 4887 [ac_exception_ptr_since_gcc46=no]) 4888 ;; 4889 esac 4890 if test x"$ac_exception_ptr_since_gcc46" = x"yes" ; then 4891 AC_DEFINE(HAVE_EXCEPTION_PTR_SINCE_GCC46, 1, 4892 [Define to 1 if GCC 4.6 supported std::exception_ptr for the target]) 4893 AC_MSG_RESULT([4.6.0]) 4894 else 4895 AC_MSG_RESULT([7.1.0]) 4896 fi 4897 fi 4898]) 4899 4900# Macros from the top-level gcc directory. 4901m4_include([../config/gc++filt.m4]) 4902m4_include([../config/tls.m4]) 4903m4_include([../config/gthr.m4]) 4904m4_include([../config/cet.m4]) 4905