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 $host. 32dnl 33dnl Sets: 34dnl SUBDIRS 35dnl Substs: 36dnl glibcxx_builddir (absolute path) 37dnl glibcxx_srcdir (absolute path) 38dnl toplevel_builddir (absolute path) 39dnl toplevel_srcdir (absolute path) 40dnl with_cross_host 41dnl with_newlib 42dnl with_target_subdir 43dnl plus 44dnl - the variables in GLIBCXX_CHECK_HOST / configure.host 45dnl - default settings for all AM_CONFITIONAL test variables 46dnl - lots of tools, like CC and CXX 47dnl 48AC_DEFUN([GLIBCXX_CONFIGURE], [ 49 # Keep these sync'd with the list in Makefile.am. The first provides an 50 # expandable list at autoconf time; the second provides an expandable list 51 # (i.e., shell variable) at configure time. 52 m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/c++17 src/filesystem doc po testsuite python]) 53 SUBDIRS='glibcxx_SUBDIRS' 54 55 # These need to be absolute paths, yet at the same time need to 56 # canonicalize only relative paths, because then amd will not unmount 57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd. 58 glibcxx_builddir=`${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"$with_gnu_ld" = x"yes"; then 276 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro]) 277 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"` 278 if test -n "$cxx_z_relo"; then 279 OPT_LDFLAGS="-Wl,-z,relro" 280 ac_ld_relro=yes 281 fi 282 AC_MSG_RESULT($ac_ld_relro) 283 fi 284 285 # Set linker optimization flags. 286 if test x"$with_gnu_ld" = x"yes"; then 287 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS" 288 fi 289 290 AC_SUBST(SECTION_LDFLAGS) 291 AC_SUBST(OPT_LDFLAGS) 292]) 293 294 295dnl 296dnl Check for headers for, and arguments to, the setrlimit() function. 297dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE. 298dnl 299dnl Defines: 300dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits 301dnl various HAVE_LIMIT_* for individual limit names 302dnl 303AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [ 304 AC_MSG_CHECKING([for RLIMIT_$1]) 305 AC_TRY_COMPILE( 306 [#include <unistd.h> 307 #include <sys/time.h> 308 #include <sys/resource.h> 309 ], 310 [ int f = RLIMIT_$1 ; ], 311 [glibcxx_mresult=1], [glibcxx_mresult=0]) 312 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult, 313 [Only used in build directory testsuite_hooks.h.]) 314 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi 315 AC_MSG_RESULT($res) 316]) 317 318AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [ 319 AC_LANG_SAVE 320 AC_LANG_CPLUSPLUS 321 setrlimit_have_headers=yes 322 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h, 323 [], 324 [setrlimit_have_headers=no]) 325 # If don't have the headers, then we can't run the tests now, and we 326 # won't be seeing any of these during testsuite compilation. 327 if test $setrlimit_have_headers = yes; then 328 # Can't do these in a loop, else the resulting syntax is wrong. 329 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA) 330 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS) 331 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM) 332 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS) 333 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE) 334 335 # Check for rlimit, setrlimit. 336 AC_CACHE_VAL(glibcxx_cv_setrlimit, [ 337 AC_TRY_COMPILE( 338 [#include <unistd.h> 339 #include <sys/time.h> 340 #include <sys/resource.h> 341 ], 342 [struct rlimit r; 343 setrlimit(0, &r);], 344 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no]) 345 ]) 346 fi 347 348 AC_MSG_CHECKING([for testsuite resource limits support]) 349 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then 350 ac_res_limits=yes 351 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1, 352 [Define if using setrlimit to set resource limits during 353 "make check"]) 354 else 355 ac_res_limits=no 356 fi 357 AC_LANG_RESTORE 358 AC_MSG_RESULT($ac_res_limits) 359]) 360 361 362dnl 363dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>. 364dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately. 365dnl 366AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [ 367 368 AC_LANG_SAVE 369 AC_LANG_CPLUSPLUS 370 ac_save_CXXFLAGS="$CXXFLAGS" 371 CXXFLAGS="$CXXFLAGS -fno-exceptions" 372 373 AC_MSG_CHECKING([for S_ISREG or S_IFREG]) 374 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [ 375 GCC_TRY_COMPILE_OR_LINK( 376 [#include <sys/stat.h>], 377 [struct stat buffer; 378 fstat(0, &buffer); 379 S_ISREG(buffer.st_mode);], 380 [glibcxx_cv_S_ISREG=yes], 381 [glibcxx_cv_S_ISREG=no]) 382 ]) 383 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [ 384 GCC_TRY_COMPILE_OR_LINK( 385 [#include <sys/stat.h>], 386 [struct stat buffer; 387 fstat(0, &buffer); 388 S_IFREG & buffer.st_mode;], 389 [glibcxx_cv_S_IFREG=yes], 390 [glibcxx_cv_S_IFREG=no]) 391 ]) 392 res=no 393 if test $glibcxx_cv_S_ISREG = yes; then 394 AC_DEFINE(HAVE_S_ISREG, 1, 395 [Define if S_ISREG is available in <sys/stat.h>.]) 396 res=S_ISREG 397 elif test $glibcxx_cv_S_IFREG = yes; then 398 AC_DEFINE(HAVE_S_IFREG, 1, 399 [Define if S_IFREG is available in <sys/stat.h>.]) 400 res=S_IFREG 401 fi 402 AC_MSG_RESULT($res) 403 404 CXXFLAGS="$ac_save_CXXFLAGS" 405 AC_LANG_RESTORE 406]) 407 408 409dnl 410dnl Check whether poll is available in <poll.h>, and define HAVE_POLL. 411dnl 412AC_DEFUN([GLIBCXX_CHECK_POLL], [ 413 414 AC_LANG_SAVE 415 AC_LANG_CPLUSPLUS 416 ac_save_CXXFLAGS="$CXXFLAGS" 417 CXXFLAGS="$CXXFLAGS -fno-exceptions" 418 419 AC_MSG_CHECKING([for poll]) 420 AC_CACHE_VAL(glibcxx_cv_POLL, [ 421 GCC_TRY_COMPILE_OR_LINK( 422 [#include <poll.h>], 423 [struct pollfd pfd[1]; 424 pfd[0].events = POLLIN; 425 poll(pfd, 1, 0);], 426 [glibcxx_cv_POLL=yes], 427 [glibcxx_cv_POLL=no]) 428 ]) 429 if test $glibcxx_cv_POLL = yes; then 430 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.]) 431 fi 432 AC_MSG_RESULT($glibcxx_cv_POLL) 433 434 CXXFLAGS="$ac_save_CXXFLAGS" 435 AC_LANG_RESTORE 436]) 437 438 439dnl 440dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV. 441dnl 442AC_DEFUN([GLIBCXX_CHECK_WRITEV], [ 443 444 AC_LANG_SAVE 445 AC_LANG_CPLUSPLUS 446 ac_save_CXXFLAGS="$CXXFLAGS" 447 CXXFLAGS="$CXXFLAGS -fno-exceptions" 448 449 AC_MSG_CHECKING([for writev]) 450 AC_CACHE_VAL(glibcxx_cv_WRITEV, [ 451 GCC_TRY_COMPILE_OR_LINK( 452 [#include <sys/uio.h>], 453 [struct iovec iov[2]; 454 writev(0, iov, 0);], 455 [glibcxx_cv_WRITEV=yes], 456 [glibcxx_cv_WRITEV=no]) 457 ]) 458 if test $glibcxx_cv_WRITEV = yes; then 459 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.]) 460 fi 461 AC_MSG_RESULT($glibcxx_cv_WRITEV) 462 463 CXXFLAGS="$ac_save_CXXFLAGS" 464 AC_LANG_RESTORE 465]) 466 467 468dnl 469dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T. 470dnl Also check whether int64_t is actually a typedef to long or long long. 471dnl 472AC_DEFUN([GLIBCXX_CHECK_INT64_T], [ 473 474 AC_LANG_SAVE 475 AC_LANG_CPLUSPLUS 476 477 AC_MSG_CHECKING([for int64_t]) 478 AC_CACHE_VAL(glibcxx_cv_INT64_T, [ 479 AC_TRY_COMPILE( 480 [#include <stdint.h>], 481 [int64_t var;], 482 [glibcxx_cv_INT64_T=yes], 483 [glibcxx_cv_INT64_T=no]) 484 ]) 485 486 if test $glibcxx_cv_INT64_T = yes; then 487 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.]) 488 AC_MSG_RESULT($glibcxx_cv_INT64_T) 489 490 AC_MSG_CHECKING([for int64_t as long]) 491 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [ 492 AC_TRY_COMPILE( 493 [#include <stdint.h> 494 template<typename, typename> struct same { enum { value = -1 }; }; 495 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; }; 496 int array[same<int64_t, long>::value];], [], 497 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no]) 498 ]) 499 500 if test $glibcxx_cv_int64_t_long = yes; then 501 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.]) 502 AC_MSG_RESULT($glibcxx_cv_int64_t_long) 503 fi 504 505 AC_MSG_CHECKING([for int64_t as long long]) 506 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [ 507 AC_TRY_COMPILE( 508 [#include <stdint.h> 509 template<typename, typename> struct same { enum { value = -1 }; }; 510 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; }; 511 int array[same<int64_t, long long>::value];], [], 512 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no]) 513 ]) 514 515 if test $glibcxx_cv_int64_t_long_long = yes; then 516 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.]) 517 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long) 518 fi 519 fi 520 521 AC_LANG_RESTORE 522]) 523 524 525dnl 526dnl Check whether LFS support is available. 527dnl 528AC_DEFUN([GLIBCXX_CHECK_LFS], [ 529 AC_LANG_SAVE 530 AC_LANG_CPLUSPLUS 531 ac_save_CXXFLAGS="$CXXFLAGS" 532 CXXFLAGS="$CXXFLAGS -fno-exceptions" 533 AC_MSG_CHECKING([for LFS support]) 534 AC_CACHE_VAL(glibcxx_cv_LFS, [ 535 GCC_TRY_COMPILE_OR_LINK( 536 [#include <unistd.h> 537 #include <stdio.h> 538 #include <sys/stat.h> 539 ], 540 [FILE* fp; 541 fopen64("t", "w"); 542 fseeko64(fp, 0, SEEK_CUR); 543 ftello64(fp); 544 lseek64(1, 0, SEEK_CUR); 545 struct stat64 buf; 546 fstat64(1, &buf);], 547 [glibcxx_cv_LFS=yes], 548 [glibcxx_cv_LFS=no]) 549 ]) 550 if test $glibcxx_cv_LFS = yes; then 551 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.]) 552 fi 553 AC_MSG_RESULT($glibcxx_cv_LFS) 554 CXXFLAGS="$ac_save_CXXFLAGS" 555 AC_LANG_RESTORE 556]) 557 558 559dnl 560dnl Check for whether a fully dynamic basic_string implementation should 561dnl be turned on, that does not put empty objects in per-process static 562dnl memory (mostly useful together with shared memory allocators, see PR 563dnl libstdc++/16612 for details). 564dnl 565dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1 566dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0 567dnl otherwise undefined 568dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)] 569dnl Where DEFAULT is either `yes' or `no'. 570dnl 571AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [ 572 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory]) 573 if test $enable_fully_dynamic_string = yes; then 574 enable_fully_dynamic_string_def=1 575 else 576 enable_fully_dynamic_string_def=0 577 fi 578 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}], 579 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults]) 580]) 581 582 583dnl 584dnl Does any necessary configuration of the testsuite directory. Generates 585dnl the testsuite_hooks.h header. 586dnl 587dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this. 588dnl 589dnl Sets: 590dnl enable_abi_check 591dnl GLIBCXX_TEST_WCHAR_T 592dnl GLIBCXX_TEST_THREAD 593dnl Substs: 594dnl baseline_dir 595dnl baseline_subdir_switch 596dnl 597AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [ 598 # Do checks for resource limit functions. 599 GLIBCXX_CHECK_SETRLIMIT 600 601 if $GLIBCXX_IS_NATIVE ; then 602 # Look for setenv, so that extended locale tests can be performed. 603 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv) 604 fi 605 606 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes && 607 test $enable_symvers != no; then 608 case "$host" in 609 *-*-cygwin*) 610 enable_abi_check=no ;; 611 *) 612 enable_abi_check=yes ;; 613 esac 614 else 615 # Only build this as native, since automake does not understand 616 # CXX_FOR_BUILD. 617 enable_abi_check=no 618 fi 619 620 # Export file names for ABI checking. 621 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}" 622 AC_SUBST(baseline_dir) 623 baseline_subdir_switch="$abi_baseline_subdir_switch" 624 AC_SUBST(baseline_subdir_switch) 625]) 626 627 628dnl 629dnl Does any necessary configuration for docbook in the docs directory. 630dnl 631dnl XSLTPROC must be set before this 632dnl 633dnl Sets: 634dnl glibcxx_stylesheets 635dnl Substs: 636dnl XSL_STYLE_DIR 637dnl 638AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [ 639 640glibcxx_docbook_url=http://docbook.sourceforge.net/release/xsl-ns/current/ 641 642AC_MSG_CHECKING([for local stylesheet directory]) 643glibcxx_local_stylesheets=no 644if test x${XMLCATALOG} = xyes && xsl_style_dir=`xmlcatalog "" $glibcxx_docbook_url 2>/dev/null` 645then 646 XSL_STYLE_DIR=`echo $xsl_style_dir | sed -n 's;^file://;;p'` 647 glibcxx_local_stylesheets=yes 648else 649 for dir in \ 650 /usr/share/sgml/docbook/xsl-ns-stylesheets \ 651 /usr/share/xml/docbook/stylesheet/docbook-xsl-ns \ 652 /usr/share/xml/docbook/stylesheet/nwalsh5/current \ 653 /usr/share/xml/docbook/stylesheet/nwalsh/current 654 do 655 if test -d $dir; then 656 glibcxx_local_stylesheets=yes 657 XSL_STYLE_DIR=$dir 658 break 659 fi 660 done 661fi 662AC_MSG_RESULT($glibcxx_local_stylesheets) 663 664if test x"$glibcxx_local_stylesheets" = x"yes"; then 665 AC_SUBST(XSL_STYLE_DIR) 666 AC_MSG_NOTICE($XSL_STYLE_DIR) 667 668 AC_MSG_CHECKING([for docbook stylesheets for documentation creation]) 669 glibcxx_stylesheets=no 670 if test x${XMLCATALOG} = xno || xmlcatalog "" $glibcxx_docbook_url/xhtml/docbook.xsl >/dev/null 2>&1; then 671 if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude $glibcxx_docbook_url/xhtml/docbook.xsl - 2>/dev/null; then 672 glibcxx_stylesheets=yes 673 fi 674 fi 675 AC_MSG_RESULT($glibcxx_stylesheets) 676 677else 678 glibcxx_stylesheets=no 679fi 680 681# Check for epub3 dependencies. 682AC_MSG_CHECKING([for epub3 stylesheets for documentation creation]) 683glibcxx_epub_stylesheets=no 684if test x"$glibcxx_local_stylesheets" = x"yes"; then 685 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then 686 glibcxx_epub_stylesheets=yes 687 fi 688fi 689AC_MSG_RESULT($glibcxx_epub_stylesheets) 690AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes") 691 692]) 693 694 695dnl 696dnl Set up *_INCLUDES variables for all sundry Makefile.am's. 697dnl 698dnl Substs: 699dnl GLIBCXX_INCLUDES 700dnl TOPLEVEL_INCLUDES 701dnl 702AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [ 703 # Used for every C++ compile we perform. 704 GLIBCXX_INCLUDES="\ 705-I$glibcxx_builddir/include/$host_alias \ 706-I$glibcxx_builddir/include \ 707-I$glibcxx_srcdir/libsupc++" 708 709 # For Canadian crosses, pick this up too. 710 if test $CANADIAN = yes; then 711 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}" 712 fi 713 714 # Stuff in the actual top level. Currently only used by libsupc++ to 715 # get unwind* headers from the libgcc dir. 716 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include' 717 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc' 718 719 # Now, export this to all the little Makefiles.... 720 AC_SUBST(GLIBCXX_INCLUDES) 721 AC_SUBST(TOPLEVEL_INCLUDES) 722]) 723 724 725dnl 726dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's. 727dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.) 728dnl 729dnl Substs: 730dnl OPTIMIZE_CXXFLAGS 731dnl WARN_FLAGS 732dnl 733AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [ 734 # Optimization flags that are probably a good idea for thrill-seekers. Just 735 # uncomment the lines below and make, everything else is ready to go... 736 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host. 737 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc 738 AC_SUBST(OPTIMIZE_CXXFLAGS) 739 740 WARN_FLAGS="-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2" 741 AC_SUBST(WARN_FLAGS) 742]) 743 744 745dnl 746dnl All installation directory information is determined here. 747dnl 748dnl Substs: 749dnl gxx_install_dir 750dnl glibcxx_prefixdir 751dnl glibcxx_toolexecdir 752dnl glibcxx_toolexeclibdir 753dnl 754dnl Assumes cross_compiling bits already done, and with_cross_host in 755dnl particular. 756dnl 757dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir. 758dnl config/gxx-include-dir.m4 must be kept consistant with this as well. 759AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [ 760 glibcxx_toolexecdir=no 761 glibcxx_toolexeclibdir=no 762 glibcxx_prefixdir=$prefix 763 764 AC_MSG_CHECKING([for gxx-include-dir]) 765 AC_ARG_WITH([gxx-include-dir], 766 AC_HELP_STRING([--with-gxx-include-dir=DIR], 767 [installation directory for include files]), 768 [case "$withval" in 769 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;; 770 no) gxx_include_dir=no ;; 771 *) gxx_include_dir=$withval ;; 772 esac], 773 [gxx_include_dir=no]) 774 AC_MSG_RESULT($gxx_include_dir) 775 776 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 777 AC_ARG_ENABLE([version-specific-runtime-libs], 778 AC_HELP_STRING([--enable-version-specific-runtime-libs], 779 [Specify that runtime libraries should be installed in a compiler-specific directory]), 780 [case "$enableval" in 781 yes) version_specific_libs=yes ;; 782 no) version_specific_libs=no ;; 783 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 784 esac], 785 [version_specific_libs=no]) 786 AC_MSG_RESULT($version_specific_libs) 787 788 GCC_WITH_TOOLEXECLIBDIR 789 790 # Default case for install directory for include files. 791 if test $version_specific_libs = no && test $gxx_include_dir = no; then 792 gxx_include_dir='include/c++/${gcc_version}' 793 if test -n "$with_cross_host" && 794 test x"$with_cross_host" != x"no"; then 795 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir" 796 else 797 gxx_include_dir='${prefix}/'"$gxx_include_dir" 798 fi 799 fi 800 801 # Version-specific runtime libs processing. 802 if test $version_specific_libs = yes; then 803 # Need the gcc compiler version to know where to install libraries 804 # and header files if --enable-version-specific-runtime-libs option 805 # is selected. FIXME: these variables are misnamed, there are 806 # no executables installed in _toolexecdir or _toolexeclibdir. 807 if test x"$gxx_include_dir" = x"no"; then 808 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++' 809 fi 810 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' 811 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)' 812 fi 813 814 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir 815 # Install a library built with a cross compiler in tooldir, not libdir. 816 if test x"$glibcxx_toolexecdir" = x"no"; then 817 if test -n "$with_cross_host" && 818 test x"$with_cross_host" != x"no"; then 819 glibcxx_toolexecdir='${exec_prefix}/${host_alias}' 820 case ${with_toolexeclibdir} in 821 no) 822 glibcxx_toolexeclibdir='${toolexecdir}/lib' 823 ;; 824 *) 825 glibcxx_toolexeclibdir=${with_toolexeclibdir} 826 ;; 827 esac 828 else 829 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' 830 glibcxx_toolexeclibdir='${libdir}' 831 fi 832 multi_os_directory=`$CXX -print-multi-os-directory` 833 case $multi_os_directory in 834 .) ;; # Avoid trailing /. 835 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;; 836 esac 837 fi 838 839 AC_MSG_CHECKING([for install location]) 840 AC_MSG_RESULT($gxx_include_dir) 841 842 AC_SUBST(glibcxx_prefixdir) 843 AC_SUBST(gxx_include_dir) 844 AC_SUBST(glibcxx_toolexecdir) 845 AC_SUBST(glibcxx_toolexeclibdir) 846]) 847 848 849dnl 850dnl GLIBCXX_ENABLE 851dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING) 852dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c) 853dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER) 854dnl 855dnl See manual/appendix_porting.html#appendix.porting.build_hacking for 856dnl documentation. 857dnl 858m4_define([GLIBCXX_ENABLE],[dnl 859m4_define([_g_switch],[--enable-$1])dnl 860m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl 861 AC_ARG_ENABLE([$1],m4_dquote(_g_help), 862 m4_bmatch([$5], 863 [^permit ], 864 [[ 865 case "$enableval" in 866 m4_bpatsubst([$5],[permit ])) ;; 867 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; 868 dnl Idea for future: generate a URL pointing to 869 dnl "onlinedocs/configopts.html#whatever" 870 esac 871 ]], 872 [^$], 873 [[ 874 case "$enableval" in 875 yes|no) ;; 876 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; 877 esac 878 ]], 879 [[$5]]), 880 [enable_]m4_bpatsubst([$1],-,_)[=][$2]) 881m4_undefine([_g_switch])dnl 882m4_undefine([_g_help])dnl 883]) 884 885 886dnl 887dnl Check for ISO/IEC 9899:1999 "C99" support. 888dnl 889dnl --enable-c99 defines _GLIBCXX_USE_C99 890dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined 891dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)] 892dnl Where DEFAULT is either `yes' or `no'. 893dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'. 894dnl 895AC_DEFUN([GLIBCXX_ENABLE_C99], [ 896 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support]) 897 898 if test x"$enable_c99" = x"yes"; then 899 AC_LANG_SAVE 900 AC_LANG_CPLUSPLUS 901 902 # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__ 903 # undefined may cause fake C99 facilities, like pre-standard snprintf, 904 # to be spuriously enabled. 905 ac_save_CXXFLAGS="$CXXFLAGS" 906 CXXFLAGS="$CXXFLAGS -std=c++98" 907 ac_save_LIBS="$LIBS" 908 ac_save_gcc_no_link="$gcc_no_link" 909 910 if test x$gcc_no_link != xyes; then 911 # Use -fno-exceptions to that the C driver can link these tests without 912 # hitting undefined references to personality routines. 913 CXXFLAGS="$CXXFLAGS -fno-exceptions" 914 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [ 915 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK 916 gcc_no_link=yes 917 ]) 918 fi 919 920 # Check for the existence of <math.h> functions used if C99 is enabled. 921 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++98]) 922 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx98, [ 923 GCC_TRY_COMPILE_OR_LINK( 924 [#include <math.h> 925 volatile double d1, d2; 926 volatile int i;], 927 [i = fpclassify(d1); 928 i = isfinite(d1); 929 i = isinf(d1); 930 i = isnan(d1); 931 i = isnormal(d1); 932 i = signbit(d1); 933 i = isgreater(d1, d2); 934 i = isgreaterequal(d1, d2); 935 i = isless(d1, d2); 936 i = islessequal(d1, d2); 937 i = islessgreater(d1, d2); 938 i = islessgreater(d1, d2); 939 i = isunordered(d1, d2); 940 ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no]) 941 ]) 942 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx98) 943 if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then 944 AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1, 945 [Define if C99 functions or macros in <math.h> should be imported 946 in <cmath> in namespace std for C++98.]) 947 fi 948 949 # Check for the existence of <complex.h> complex math functions. 950 # This is necessary even though libstdc++ uses the builtin versions 951 # of these functions, because if the builtin cannot be used, a reference 952 # to the library function is emitted. 953 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no) 954 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 955 if test x"$ac_has_complex_h" = x"yes"; then 956 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++98]) 957 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx98, [ 958 GCC_TRY_COMPILE_OR_LINK( 959 [#include <complex.h> 960 typedef __complex__ float float_type; 961 typedef __complex__ double double_type; 962 typedef __complex__ long double ld_type; 963 volatile float_type tmpf; 964 volatile double_type tmpd; 965 volatile ld_type tmpld; 966 volatile float f; 967 volatile double d; 968 volatile long double ld;], 969 [f = cabsf(tmpf); 970 f = cargf(tmpf); 971 tmpf = ccosf(tmpf); 972 tmpf = ccoshf(tmpf); 973 tmpf = cexpf(tmpf); 974 tmpf = clogf(tmpf); 975 tmpf = csinf(tmpf); 976 tmpf = csinhf(tmpf); 977 tmpf = csqrtf(tmpf); 978 tmpf = ctanf(tmpf); 979 tmpf = ctanhf(tmpf); 980 tmpf = cpowf(tmpf, tmpf); 981 tmpf = cprojf(tmpf); 982 d = cabs(tmpd); 983 d = carg(tmpd); 984 tmpd = ccos(tmpd); 985 tmpd = ccosh(tmpd); 986 tmpd = cexp(tmpd); 987 tmpd = clog(tmpd); 988 tmpd = csin(tmpd); 989 tmpd = csinh(tmpd); 990 tmpd = csqrt(tmpd); 991 tmpd = ctan(tmpd); 992 tmpd = ctanh(tmpd); 993 tmpd = cpow(tmpd, tmpd); 994 tmpd = cproj(tmpd); 995 ld = cabsl(tmpld); 996 ld = cargl(tmpld); 997 tmpld = ccosl(tmpld); 998 tmpld = ccoshl(tmpld); 999 tmpld = cexpl(tmpld); 1000 tmpld = clogl(tmpld); 1001 tmpld = csinl(tmpld); 1002 tmpld = csinhl(tmpld); 1003 tmpld = csqrtl(tmpld); 1004 tmpld = ctanl(tmpld); 1005 tmpld = ctanhl(tmpld); 1006 tmpld = cpowl(tmpld, tmpld); 1007 tmpld = cprojl(tmpld); 1008 ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no]) 1009 ]) 1010 fi 1011 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx98) 1012 if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then 1013 AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1, 1014 [Define if C99 functions in <complex.h> should be used in 1015 <complex> for C++98. Using compiler builtins for these functions 1016 requires corresponding C99 library functions to be present.]) 1017 fi 1018 1019 # Check for the existence in <stdio.h> of vscanf, et. al. 1020 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++98]) 1021 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx98, [ 1022 GCC_TRY_COMPILE_OR_LINK( 1023 [#include <stdio.h> 1024 #include <stdarg.h> 1025 void foo(char* fmt, ...) 1026 { 1027 va_list args; va_start(args, fmt); 1028 vfscanf(stderr, "%i", args); 1029 vscanf("%i", args); 1030 vsnprintf(fmt, 0, "%i", args); 1031 vsscanf(fmt, "%i", args); 1032 snprintf(fmt, 0, "%i"); 1033 }], [], 1034 [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no]) 1035 ]) 1036 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx98) 1037 if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then 1038 AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1, 1039 [Define if C99 functions or macros in <stdio.h> should be imported 1040 in <cstdio> in namespace std for C++98.]) 1041 fi 1042 1043 # Check for the existence in <stdlib.h> of lldiv_t, et. al. 1044 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++98]) 1045 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx98, [ 1046 GCC_TRY_COMPILE_OR_LINK( 1047 [#include <stdlib.h> 1048 volatile float f; 1049 volatile long double ld; 1050 volatile unsigned long long ll; 1051 lldiv_t mydivt;], 1052 [char* tmp; 1053 f = strtof("gnu", &tmp); 1054 ld = strtold("gnu", &tmp); 1055 ll = strtoll("gnu", &tmp, 10); 1056 ll = strtoull("gnu", &tmp, 10); 1057 ll = llabs(10); 1058 mydivt = lldiv(10,1); 1059 ll = mydivt.quot; 1060 ll = mydivt.rem; 1061 ll = atoll("10"); 1062 _Exit(0); 1063 ], [glibcxx_cv_c99_stdlib_cxx98=yes], [glibcxx_cv_c99_stdlib_cxx98=no]) 1064 ]) 1065 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx98) 1066 if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then 1067 AC_DEFINE(_GLIBCXX98_USE_C99_STDLIB, 1, 1068 [Define if C99 functions or macros in <stdlib.h> should be imported 1069 in <cstdlib> in namespace std for C++98.]) 1070 fi 1071 1072 # Check for the existence in <wchar.h> of wcstold, etc. 1073 if test x"$ac_has_wchar_h" = xyes && 1074 test x"$ac_has_wctype_h" = xyes; then 1075 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++98]) 1076 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx98, [ 1077 AC_TRY_COMPILE([#include <wchar.h> 1078 namespace test 1079 { 1080 using ::wcstold; 1081 using ::wcstoll; 1082 using ::wcstoull; 1083 } 1084 ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no]) 1085 ]) 1086 1087 # Checks for wide character functions that may not be present. 1088 # Injection of these is wrapped with guard macros. 1089 # NB: only put functions here, instead of immediately above, if 1090 # absolutely necessary. 1091 AC_TRY_COMPILE([#include <wchar.h> 1092 namespace test { using ::vfwscanf; }], [], 1093 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], []) 1094 1095 AC_TRY_COMPILE([#include <wchar.h> 1096 namespace test { using ::vswscanf; }], [], 1097 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], []) 1098 1099 AC_TRY_COMPILE([#include <wchar.h> 1100 namespace test { using ::vwscanf; }], [], 1101 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], []) 1102 1103 AC_TRY_COMPILE([#include <wchar.h> 1104 namespace test { using ::wcstof; }], [], 1105 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], []) 1106 1107 AC_TRY_COMPILE([#include <wctype.h>], 1108 [wint_t t; int i = iswblank(t);], 1109 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], []) 1110 1111 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx98) 1112 if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then 1113 AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1, 1114 [Define if C99 functions or macros in <wchar.h> should be imported 1115 in <cwchar> in namespace std for C++98.]) 1116 fi 1117 fi 1118 1119 # Option parsed, now set things appropriately. 1120 if test x"$glibcxx_cv_c99_math_cxx98" = x"no" || 1121 test x"$glibcxx_cv_c99_complex_cxx98" = x"no" || 1122 test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" || 1123 test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" || 1124 test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then 1125 enable_c99=no; 1126 else 1127 AC_DEFINE(_GLIBCXX_USE_C99, 1, 1128 [Define if C99 functions or macros from <wchar.h>, <math.h>, 1129 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.]) 1130 fi 1131 1132 gcc_no_link="$ac_save_gcc_no_link" 1133 LIBS="$ac_save_LIBS" 1134 CXXFLAGS="$ac_save_CXXFLAGS" 1135 AC_LANG_RESTORE 1136 1137 AC_LANG_SAVE 1138 AC_LANG_CPLUSPLUS 1139 1140 # Use -std=c++11 and test again for C99 library feature in C++11 mode. 1141 # For the reasons given above we use -std=c++11 not -std=gnu++11. 1142 ac_save_CXXFLAGS="$CXXFLAGS" 1143 CXXFLAGS="$CXXFLAGS -std=c++11" 1144 ac_save_LIBS="$LIBS" 1145 ac_save_gcc_no_link="$gcc_no_link" 1146 1147 if test x$gcc_no_link != xyes; then 1148 # Use -fno-exceptions to that the C driver can link these tests without 1149 # hitting undefined references to personality routines. 1150 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1151 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [ 1152 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK 1153 gcc_no_link=yes 1154 ]) 1155 fi 1156 1157 # Check for the existence of <math.h> functions used if C99 is enabled. 1158 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++11]) 1159 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx11, [ 1160 GCC_TRY_COMPILE_OR_LINK( 1161 [#include <math.h> 1162 volatile double d1, d2; 1163 volatile int i;], 1164 [i = fpclassify(d1); 1165 i = isfinite(d1); 1166 i = isinf(d1); 1167 i = isnan(d1); 1168 i = isnormal(d1); 1169 i = signbit(d1); 1170 i = isgreater(d1, d2); 1171 i = isgreaterequal(d1, d2); 1172 i = isless(d1, d2); 1173 i = islessequal(d1, d2); 1174 i = islessgreater(d1, d2); 1175 i = islessgreater(d1, d2); 1176 i = isunordered(d1, d2); 1177 ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no]) 1178 ]) 1179 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx11) 1180 if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then 1181 AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1, 1182 [Define if C99 functions or macros in <math.h> should be imported 1183 in <cmath> in namespace std for C++11.]) 1184 fi 1185 1186 # Check for the existence of <complex.h> complex math functions. 1187 # This is necessary even though libstdc++ uses the builtin versions 1188 # of these functions, because if the builtin cannot be used, a reference 1189 # to the library function is emitted. 1190 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no) 1191 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 1192 if test x"$ac_has_complex_h" = x"yes"; then 1193 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++11]) 1194 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx11, [ 1195 GCC_TRY_COMPILE_OR_LINK( 1196 [#include <complex.h> 1197 typedef __complex__ float float_type; 1198 typedef __complex__ double double_type; 1199 typedef __complex__ long double ld_type; 1200 volatile float_type tmpf; 1201 volatile double_type tmpd; 1202 volatile ld_type tmpld; 1203 volatile float f; 1204 volatile double d; 1205 volatile long double ld;], 1206 [f = cabsf(tmpf); 1207 f = cargf(tmpf); 1208 tmpf = ccosf(tmpf); 1209 tmpf = ccoshf(tmpf); 1210 tmpf = cexpf(tmpf); 1211 tmpf = clogf(tmpf); 1212 tmpf = csinf(tmpf); 1213 tmpf = csinhf(tmpf); 1214 tmpf = csqrtf(tmpf); 1215 tmpf = ctanf(tmpf); 1216 tmpf = ctanhf(tmpf); 1217 tmpf = cpowf(tmpf, tmpf); 1218 tmpf = cprojf(tmpf); 1219 d = cabs(tmpd); 1220 d = carg(tmpd); 1221 tmpd = ccos(tmpd); 1222 tmpd = ccosh(tmpd); 1223 tmpd = cexp(tmpd); 1224 tmpd = clog(tmpd); 1225 tmpd = csin(tmpd); 1226 tmpd = csinh(tmpd); 1227 tmpd = csqrt(tmpd); 1228 tmpd = ctan(tmpd); 1229 tmpd = ctanh(tmpd); 1230 tmpd = cpow(tmpd, tmpd); 1231 tmpd = cproj(tmpd); 1232 ld = cabsl(tmpld); 1233 ld = cargl(tmpld); 1234 tmpld = ccosl(tmpld); 1235 tmpld = ccoshl(tmpld); 1236 tmpld = cexpl(tmpld); 1237 tmpld = clogl(tmpld); 1238 tmpld = csinl(tmpld); 1239 tmpld = csinhl(tmpld); 1240 tmpld = csqrtl(tmpld); 1241 tmpld = ctanl(tmpld); 1242 tmpld = ctanhl(tmpld); 1243 tmpld = cpowl(tmpld, tmpld); 1244 tmpld = cprojl(tmpld); 1245 ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no]) 1246 ]) 1247 fi 1248 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx11) 1249 if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then 1250 AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1, 1251 [Define if C99 functions in <complex.h> should be used in 1252 <complex> for C++11. Using compiler builtins for these functions 1253 requires corresponding C99 library functions to be present.]) 1254 fi 1255 1256 # Check for the existence in <stdio.h> of vscanf, et. al. 1257 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++11]) 1258 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx11, [ 1259 GCC_TRY_COMPILE_OR_LINK( 1260 [#include <stdio.h> 1261 #include <stdarg.h> 1262 void foo(char* fmt, ...) 1263 { 1264 va_list args; va_start(args, fmt); 1265 vfscanf(stderr, "%i", args); 1266 vscanf("%i", args); 1267 vsnprintf(fmt, 0, "%i", args); 1268 vsscanf(fmt, "%i", args); 1269 snprintf(fmt, 0, "%i"); 1270 }], [], 1271 [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no]) 1272 ]) 1273 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx11) 1274 if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then 1275 AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1, 1276 [Define if C99 functions or macros in <stdio.h> should be imported 1277 in <cstdio> in namespace std for C++11.]) 1278 fi 1279 1280 # Check for the existence in <stdlib.h> of lldiv_t, et. al. 1281 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++11]) 1282 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx11, [ 1283 GCC_TRY_COMPILE_OR_LINK( 1284 [#include <stdlib.h> 1285 volatile float f; 1286 volatile long double ld; 1287 volatile unsigned long long ll; 1288 lldiv_t mydivt;], 1289 [char* tmp; 1290 f = strtof("gnu", &tmp); 1291 ld = strtold("gnu", &tmp); 1292 ll = strtoll("gnu", &tmp, 10); 1293 ll = strtoull("gnu", &tmp, 10); 1294 ll = llabs(10); 1295 mydivt = lldiv(10,1); 1296 ll = mydivt.quot; 1297 ll = mydivt.rem; 1298 ll = atoll("10"); 1299 _Exit(0); 1300 ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no]) 1301 ]) 1302 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx11) 1303 if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then 1304 AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1, 1305 [Define if C99 functions or macros in <stdlib.h> should be imported 1306 in <cstdlib> in namespace std for C++11.]) 1307 fi 1308 1309 # Check for the existence in <wchar.h> of wcstold, etc. 1310 if test x"$ac_has_wchar_h" = xyes && 1311 test x"$ac_has_wctype_h" = xyes; then 1312 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++11]) 1313 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx11, [ 1314 AC_TRY_COMPILE([#include <wchar.h> 1315 namespace test 1316 { 1317 using ::wcstold; 1318 using ::wcstoll; 1319 using ::wcstoull; 1320 } 1321 ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no]) 1322 ]) 1323 1324 # Checks for wide character functions that may not be present. 1325 # Injection of these is wrapped with guard macros. 1326 # NB: only put functions here, instead of immediately above, if 1327 # absolutely necessary. 1328 AC_TRY_COMPILE([#include <wchar.h> 1329 namespace test { using ::vfwscanf; }], [], 1330 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], []) 1331 1332 AC_TRY_COMPILE([#include <wchar.h> 1333 namespace test { using ::vswscanf; }], [], 1334 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], []) 1335 1336 AC_TRY_COMPILE([#include <wchar.h> 1337 namespace test { using ::vwscanf; }], [], 1338 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], []) 1339 1340 AC_TRY_COMPILE([#include <wchar.h> 1341 namespace test { using ::wcstof; }], [], 1342 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], []) 1343 1344 AC_TRY_COMPILE([#include <wctype.h>], 1345 [wint_t t; int i = iswblank(t);], 1346 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], []) 1347 1348 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx11) 1349 if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then 1350 AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1, 1351 [Define if C99 functions or macros in <wchar.h> should be imported 1352 in <cwchar> in namespace std for C++11.]) 1353 fi 1354 fi 1355 1356 gcc_no_link="$ac_save_gcc_no_link" 1357 LIBS="$ac_save_LIBS" 1358 CXXFLAGS="$ac_save_CXXFLAGS" 1359 AC_LANG_RESTORE 1360 fi 1361 1362 AC_MSG_CHECKING([for fully enabled ISO C99 support]) 1363 AC_MSG_RESULT($enable_c99) 1364]) 1365 1366 1367dnl 1368dnl Check for clock_gettime, nanosleep and sched_yield, used in the 1369dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this] 1370dnl in the C++11 standard. 1371dnl 1372dnl --enable-libstdcxx-time 1373dnl --enable-libstdcxx-time=yes 1374dnl checks for the availability of monotonic and realtime clocks, 1375dnl nanosleep and sched_yield in libc and libposix4 and, if needed, 1376dnl links in the latter. 1377dnl --enable-libstdcxx-time=rt 1378dnl also searches (and, if needed, links) librt. Note that this is 1379dnl not always desirable because, in glibc 2.16 and earlier, for 1380dnl example, in turn it triggers the linking of libpthread too, 1381dnl which activates locking, 1382dnl a large overhead for single-thread programs. 1383dnl --enable-libstdcxx-time=no 1384dnl --disable-libstdcxx-time 1385dnl disables the checks completely 1386dnl 1387dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX 1388dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test 1389dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in 1390dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD. 1391dnl 1392AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [ 1393 1394 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]], 1395 [use KIND for check type], 1396 [permit yes|no|rt]) 1397 1398 AC_LANG_SAVE 1399 AC_LANG_CPLUSPLUS 1400 ac_save_CXXFLAGS="$CXXFLAGS" 1401 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1402 ac_save_LIBS="$LIBS" 1403 1404 ac_has_clock_monotonic=no 1405 ac_has_clock_realtime=no 1406 ac_has_nanosleep=no 1407 ac_has_sched_yield=no 1408 1409 if test x"$enable_libstdcxx_time" = x"auto"; then 1410 1411 case "${target_os}" in 1412 cygwin*) 1413 ac_has_nanosleep=yes 1414 ;; 1415 darwin*) 1416 ac_has_nanosleep=yes 1417 ac_has_sched_yield=yes 1418 ;; 1419 # VxWorks has nanosleep as soon as the kernel is configured with 1420 # INCLUDE_POSIX_TIMERS, which is normally/most-often the case. 1421 vxworks*) 1422 ac_has_nanosleep=yes 1423 ;; 1424 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) 1425 # Don't use link test for freestanding library, in case gcc_no_link=yes 1426 if test x"$is_hosted" = xyes; then 1427 # Versions of glibc before 2.17 needed -lrt for clock_gettime. 1428 AC_SEARCH_LIBS(clock_gettime, [rt]) 1429 if test x"$ac_cv_search_clock_gettime" = x"none required"; then 1430 ac_has_clock_monotonic=yes 1431 ac_has_clock_realtime=yes 1432 fi 1433 fi 1434 ac_has_nanosleep=yes 1435 ac_has_sched_yield=yes 1436 ;; 1437 freebsd*|netbsd*|dragonfly*|rtems*) 1438 ac_has_clock_monotonic=yes 1439 ac_has_clock_realtime=yes 1440 ac_has_nanosleep=yes 1441 ac_has_sched_yield=yes 1442 ;; 1443 openbsd*) 1444 ac_has_clock_monotonic=yes 1445 ac_has_clock_realtime=yes 1446 ac_has_nanosleep=yes 1447 ;; 1448 solaris*) 1449 GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt" 1450 ac_has_clock_monotonic=yes 1451 ac_has_clock_realtime=yes 1452 ac_has_nanosleep=yes 1453 ac_has_sched_yield=yes 1454 ;; 1455 uclinux*) 1456 ac_has_nanosleep=yes 1457 ac_has_sched_yield=yes 1458 esac 1459 1460 elif test x"$enable_libstdcxx_time" != x"no"; then 1461 1462 if test x"$enable_libstdcxx_time" = x"rt"; then 1463 AC_SEARCH_LIBS(clock_gettime, [rt posix4]) 1464 AC_SEARCH_LIBS(nanosleep, [rt posix4]) 1465 else 1466 AC_SEARCH_LIBS(clock_gettime, [posix4]) 1467 AC_SEARCH_LIBS(nanosleep, [posix4]) 1468 fi 1469 1470 case "$ac_cv_search_clock_gettime" in 1471 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime 1472 ;; 1473 esac 1474 case "$ac_cv_search_nanosleep" in 1475 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep" 1476 ;; 1477 esac 1478 1479 AC_SEARCH_LIBS(sched_yield, [rt posix4]) 1480 1481 case "$ac_cv_search_sched_yield" in 1482 -lposix4*) 1483 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield" 1484 ac_has_sched_yield=yes 1485 ;; 1486 -lrt*) 1487 if test x"$enable_libstdcxx_time" = x"rt"; then 1488 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield" 1489 ac_has_sched_yield=yes 1490 fi 1491 ;; 1492 *) 1493 ac_has_sched_yield=yes 1494 ;; 1495 esac 1496 1497 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no) 1498 1499 if test x"$ac_has_unistd_h" = x"yes"; then 1500 AC_MSG_CHECKING([for monotonic clock]) 1501 AC_TRY_LINK( 1502 [#include <unistd.h> 1503 #include <time.h> 1504 ], 1505 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) 1506 timespec tp; 1507 #endif 1508 clock_gettime(CLOCK_MONOTONIC, &tp); 1509 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no]) 1510 1511 AC_MSG_RESULT($ac_has_clock_monotonic) 1512 1513 AC_MSG_CHECKING([for realtime clock]) 1514 AC_TRY_LINK( 1515 [#include <unistd.h> 1516 #include <time.h> 1517 ], 1518 [#if _POSIX_TIMERS > 0 1519 timespec tp; 1520 #endif 1521 clock_gettime(CLOCK_REALTIME, &tp); 1522 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no]) 1523 1524 AC_MSG_RESULT($ac_has_clock_realtime) 1525 1526 AC_MSG_CHECKING([for nanosleep]) 1527 AC_TRY_LINK( 1528 [#include <unistd.h> 1529 #include <time.h> 1530 ], 1531 [#if _POSIX_TIMERS > 0 1532 timespec tp; 1533 #endif 1534 nanosleep(&tp, 0); 1535 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no]) 1536 1537 AC_MSG_RESULT($ac_has_nanosleep) 1538 fi 1539 fi 1540 1541 if test x"$ac_has_clock_monotonic" != x"yes"; then 1542 case ${target_os} in 1543 linux* | uclinux*) 1544 AC_MSG_CHECKING([for clock_gettime syscall]) 1545 AC_TRY_COMPILE( 1546 [#include <unistd.h> 1547 #include <time.h> 1548 #include <sys/syscall.h> 1549 ], 1550 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) 1551 timespec tp; 1552 #endif 1553 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp); 1554 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp); 1555 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no]) 1556 AC_MSG_RESULT($ac_has_clock_monotonic_syscall) 1557 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then 1558 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1, 1559 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ]) 1560 ac_has_clock_monotonic=yes 1561 ac_has_clock_realtime=yes 1562 fi;; 1563 esac 1564 fi 1565 1566 if test x"$ac_has_clock_monotonic" = x"yes"; then 1567 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1, 1568 [ Defined if clock_gettime has monotonic clock support. ]) 1569 fi 1570 1571 if test x"$ac_has_clock_realtime" = x"yes"; then 1572 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1, 1573 [ Defined if clock_gettime has realtime clock support. ]) 1574 fi 1575 1576 if test x"$ac_has_sched_yield" = x"yes"; then 1577 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1, 1578 [ Defined if sched_yield is available. ]) 1579 fi 1580 1581 if test x"$ac_has_nanosleep" = x"yes"; then 1582 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1, 1583 [ Defined if nanosleep is available. ]) 1584 else 1585 AC_MSG_CHECKING([for sleep]) 1586 AC_TRY_COMPILE([#include <unistd.h>], 1587 [sleep(1)], 1588 [ac_has_sleep=yes],[ac_has_sleep=no]) 1589 if test x"$ac_has_sleep" = x"yes"; then 1590 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.]) 1591 fi 1592 AC_MSG_RESULT($ac_has_sleep) 1593 AC_MSG_CHECKING([for usleep]) 1594 AC_TRY_COMPILE([#include <unistd.h>], 1595 [sleep(1); 1596 usleep(100);], 1597 [ac_has_usleep=yes],[ac_has_usleep=no]) 1598 if test x"$ac_has_usleep" = x"yes"; then 1599 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.]) 1600 fi 1601 AC_MSG_RESULT($ac_has_usleep) 1602 fi 1603 1604 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then 1605 AC_MSG_CHECKING([for Sleep]) 1606 AC_TRY_COMPILE([#include <windows.h>], 1607 [Sleep(1)], 1608 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no]) 1609 if test x"$ac_has_win32_sleep" = x"yes"; then 1610 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.]) 1611 fi 1612 AC_MSG_RESULT($ac_has_win32_sleep) 1613 fi 1614 1615 AC_SUBST(GLIBCXX_LIBS) 1616 1617 CXXFLAGS="$ac_save_CXXFLAGS" 1618 LIBS="$ac_save_LIBS" 1619 AC_LANG_RESTORE 1620]) 1621 1622dnl 1623dnl Check for gettimeofday, used in the implementation of 20.11.7 1624dnl [time.clock] in the C++11 standard. 1625dnl 1626AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [ 1627 1628 AC_MSG_CHECKING([for gettimeofday]) 1629 1630 AC_LANG_SAVE 1631 AC_LANG_CPLUSPLUS 1632 ac_save_CXXFLAGS="$CXXFLAGS" 1633 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1634 1635 ac_has_gettimeofday=no; 1636 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no) 1637 if test x"$ac_has_sys_time_h" = x"yes"; then 1638 AC_MSG_CHECKING([for gettimeofday]) 1639 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>], 1640 [timeval tv; gettimeofday(&tv, 0);], 1641 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no]) 1642 1643 AC_MSG_RESULT($ac_has_gettimeofday) 1644 fi 1645 1646 if test x"$ac_has_gettimeofday" = x"yes"; then 1647 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1, 1648 [ Defined if gettimeofday is available. ]) 1649 fi 1650 1651 CXXFLAGS="$ac_save_CXXFLAGS" 1652 AC_LANG_RESTORE 1653]) 1654 1655dnl 1656dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1" 1657dnl facilities in Chapter 8, "C compatibility". 1658dnl 1659AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [ 1660 1661 AC_LANG_SAVE 1662 AC_LANG_CPLUSPLUS 1663 1664 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__ 1665 # undefined and fake C99 facilities may be spuriously enabled. 1666 ac_save_CXXFLAGS="$CXXFLAGS" 1667 CXXFLAGS="$CXXFLAGS -std=c++98" 1668 1669 # Check for the existence of <complex.h> complex math functions used 1670 # by tr1/complex. 1671 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 1672 ac_c99_complex_tr1=no; 1673 if test x"$ac_has_complex_h" = x"yes"; then 1674 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>]) 1675 AC_TRY_COMPILE([#include <complex.h>], 1676 [typedef __complex__ float float_type; float_type tmpf; 1677 cacosf(tmpf); 1678 casinf(tmpf); 1679 catanf(tmpf); 1680 cacoshf(tmpf); 1681 casinhf(tmpf); 1682 catanhf(tmpf); 1683 typedef __complex__ double double_type; double_type tmpd; 1684 cacos(tmpd); 1685 casin(tmpd); 1686 catan(tmpd); 1687 cacosh(tmpd); 1688 casinh(tmpd); 1689 catanh(tmpd); 1690 typedef __complex__ long double ld_type; ld_type tmpld; 1691 cacosl(tmpld); 1692 casinl(tmpld); 1693 catanl(tmpld); 1694 cacoshl(tmpld); 1695 casinhl(tmpld); 1696 catanhl(tmpld); 1697 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no]) 1698 fi 1699 AC_MSG_RESULT($ac_c99_complex_tr1) 1700 if test x"$ac_c99_complex_tr1" = x"yes"; then 1701 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1, 1702 [Define if C99 functions in <complex.h> should be used in 1703 <tr1/complex>. Using compiler builtins for these functions 1704 requires corresponding C99 library functions to be present.]) 1705 fi 1706 1707 # Check for the existence of <ctype.h> functions. 1708 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>]) 1709 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [ 1710 AC_TRY_COMPILE([#include <ctype.h>], 1711 [int ch; 1712 int ret; 1713 ret = isblank(ch); 1714 ],[glibcxx_cv_c99_ctype_tr1=yes], 1715 [glibcxx_cv_c99_ctype_tr1=no]) 1716 ]) 1717 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1) 1718 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then 1719 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1, 1720 [Define if C99 functions in <ctype.h> should be imported in 1721 <tr1/cctype> in namespace std::tr1.]) 1722 fi 1723 1724 # Check for the existence of <fenv.h> functions. 1725 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no) 1726 ac_c99_fenv_tr1=no; 1727 if test x"$ac_has_fenv_h" = x"yes"; then 1728 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>]) 1729 AC_TRY_COMPILE([#include <fenv.h>], 1730 [int except, mode; 1731 fexcept_t* pflag; 1732 fenv_t* penv; 1733 int ret; 1734 ret = feclearexcept(except); 1735 ret = fegetexceptflag(pflag, except); 1736 ret = feraiseexcept(except); 1737 ret = fesetexceptflag(pflag, except); 1738 ret = fetestexcept(except); 1739 ret = fegetround(); 1740 ret = fesetround(mode); 1741 ret = fegetenv(penv); 1742 ret = feholdexcept(penv); 1743 ret = fesetenv(penv); 1744 ret = feupdateenv(penv); 1745 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no]) 1746 fi 1747 AC_MSG_RESULT($ac_c99_fenv_tr1) 1748 if test x"$ac_c99_fenv_tr1" = x"yes"; then 1749 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1, 1750 [Define if C99 functions in <fenv.h> should be imported in 1751 <tr1/cfenv> in namespace std::tr1.]) 1752 fi 1753 1754 # Check for the existence of <stdint.h> types. 1755 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>]) 1756 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [ 1757 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS 1758 #define __STDC_CONSTANT_MACROS 1759 #include <stdint.h>], 1760 [typedef int8_t my_int8_t; 1761 my_int8_t i8 = INT8_MIN; 1762 i8 = INT8_MAX; 1763 typedef int16_t my_int16_t; 1764 my_int16_t i16 = INT16_MIN; 1765 i16 = INT16_MAX; 1766 typedef int32_t my_int32_t; 1767 my_int32_t i32 = INT32_MIN; 1768 i32 = INT32_MAX; 1769 typedef int64_t my_int64_t; 1770 my_int64_t i64 = INT64_MIN; 1771 i64 = INT64_MAX; 1772 typedef int_fast8_t my_int_fast8_t; 1773 my_int_fast8_t if8 = INT_FAST8_MIN; 1774 if8 = INT_FAST8_MAX; 1775 typedef int_fast16_t my_int_fast16_t; 1776 my_int_fast16_t if16 = INT_FAST16_MIN; 1777 if16 = INT_FAST16_MAX; 1778 typedef int_fast32_t my_int_fast32_t; 1779 my_int_fast32_t if32 = INT_FAST32_MIN; 1780 if32 = INT_FAST32_MAX; 1781 typedef int_fast64_t my_int_fast64_t; 1782 my_int_fast64_t if64 = INT_FAST64_MIN; 1783 if64 = INT_FAST64_MAX; 1784 typedef int_least8_t my_int_least8_t; 1785 my_int_least8_t il8 = INT_LEAST8_MIN; 1786 il8 = INT_LEAST8_MAX; 1787 typedef int_least16_t my_int_least16_t; 1788 my_int_least16_t il16 = INT_LEAST16_MIN; 1789 il16 = INT_LEAST16_MAX; 1790 typedef int_least32_t my_int_least32_t; 1791 my_int_least32_t il32 = INT_LEAST32_MIN; 1792 il32 = INT_LEAST32_MAX; 1793 typedef int_least64_t my_int_least64_t; 1794 my_int_least64_t il64 = INT_LEAST64_MIN; 1795 il64 = INT_LEAST64_MAX; 1796 typedef intmax_t my_intmax_t; 1797 my_intmax_t im = INTMAX_MAX; 1798 im = INTMAX_MIN; 1799 typedef intptr_t my_intptr_t; 1800 my_intptr_t ip = INTPTR_MAX; 1801 ip = INTPTR_MIN; 1802 typedef uint8_t my_uint8_t; 1803 my_uint8_t ui8 = UINT8_MAX; 1804 ui8 = UINT8_MAX; 1805 typedef uint16_t my_uint16_t; 1806 my_uint16_t ui16 = UINT16_MAX; 1807 ui16 = UINT16_MAX; 1808 typedef uint32_t my_uint32_t; 1809 my_uint32_t ui32 = UINT32_MAX; 1810 ui32 = UINT32_MAX; 1811 typedef uint64_t my_uint64_t; 1812 my_uint64_t ui64 = UINT64_MAX; 1813 ui64 = UINT64_MAX; 1814 typedef uint_fast8_t my_uint_fast8_t; 1815 my_uint_fast8_t uif8 = UINT_FAST8_MAX; 1816 uif8 = UINT_FAST8_MAX; 1817 typedef uint_fast16_t my_uint_fast16_t; 1818 my_uint_fast16_t uif16 = UINT_FAST16_MAX; 1819 uif16 = UINT_FAST16_MAX; 1820 typedef uint_fast32_t my_uint_fast32_t; 1821 my_uint_fast32_t uif32 = UINT_FAST32_MAX; 1822 uif32 = UINT_FAST32_MAX; 1823 typedef uint_fast64_t my_uint_fast64_t; 1824 my_uint_fast64_t uif64 = UINT_FAST64_MAX; 1825 uif64 = UINT_FAST64_MAX; 1826 typedef uint_least8_t my_uint_least8_t; 1827 my_uint_least8_t uil8 = UINT_LEAST8_MAX; 1828 uil8 = UINT_LEAST8_MAX; 1829 typedef uint_least16_t my_uint_least16_t; 1830 my_uint_least16_t uil16 = UINT_LEAST16_MAX; 1831 uil16 = UINT_LEAST16_MAX; 1832 typedef uint_least32_t my_uint_least32_t; 1833 my_uint_least32_t uil32 = UINT_LEAST32_MAX; 1834 uil32 = UINT_LEAST32_MAX; 1835 typedef uint_least64_t my_uint_least64_t; 1836 my_uint_least64_t uil64 = UINT_LEAST64_MAX; 1837 uil64 = UINT_LEAST64_MAX; 1838 typedef uintmax_t my_uintmax_t; 1839 my_uintmax_t uim = UINTMAX_MAX; 1840 uim = UINTMAX_MAX; 1841 typedef uintptr_t my_uintptr_t; 1842 my_uintptr_t uip = UINTPTR_MAX; 1843 uip = UINTPTR_MAX; 1844 ],[glibcxx_cv_c99_stdint_tr1=yes], 1845 [glibcxx_cv_c99_stdint_tr1=no]) 1846 ]) 1847 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1) 1848 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 1849 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1, 1850 [Define if C99 types in <stdint.h> should be imported in 1851 <tr1/cstdint> in namespace std::tr1.]) 1852 fi 1853 1854 # Check for the existence of <math.h> functions. 1855 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>]) 1856 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [ 1857 AC_TRY_COMPILE([#include <math.h>], 1858 [typedef double_t my_double_t; 1859 typedef float_t my_float_t; 1860 acosh(0.0); 1861 acoshf(0.0f); 1862 acoshl(0.0l); 1863 asinh(0.0); 1864 asinhf(0.0f); 1865 asinhl(0.0l); 1866 atanh(0.0); 1867 atanhf(0.0f); 1868 atanhl(0.0l); 1869 cbrt(0.0); 1870 cbrtf(0.0f); 1871 cbrtl(0.0l); 1872 copysign(0.0, 0.0); 1873 copysignf(0.0f, 0.0f); 1874 copysignl(0.0l, 0.0l); 1875 erf(0.0); 1876 erff(0.0f); 1877 erfl(0.0l); 1878 erfc(0.0); 1879 erfcf(0.0f); 1880 erfcl(0.0l); 1881 exp2(0.0); 1882 exp2f(0.0f); 1883 exp2l(0.0l); 1884 expm1(0.0); 1885 expm1f(0.0f); 1886 expm1l(0.0l); 1887 fdim(0.0, 0.0); 1888 fdimf(0.0f, 0.0f); 1889 fdiml(0.0l, 0.0l); 1890 fma(0.0, 0.0, 0.0); 1891 fmaf(0.0f, 0.0f, 0.0f); 1892 fmal(0.0l, 0.0l, 0.0l); 1893 fmax(0.0, 0.0); 1894 fmaxf(0.0f, 0.0f); 1895 fmaxl(0.0l, 0.0l); 1896 fmin(0.0, 0.0); 1897 fminf(0.0f, 0.0f); 1898 fminl(0.0l, 0.0l); 1899 hypot(0.0, 0.0); 1900 hypotf(0.0f, 0.0f); 1901 hypotl(0.0l, 0.0l); 1902 ilogb(0.0); 1903 ilogbf(0.0f); 1904 ilogbl(0.0l); 1905 lgamma(0.0); 1906 lgammaf(0.0f); 1907 lgammal(0.0l); 1908 #ifndef __APPLE__ /* see below */ 1909 llrint(0.0); 1910 llrintf(0.0f); 1911 llrintl(0.0l); 1912 llround(0.0); 1913 llroundf(0.0f); 1914 llroundl(0.0l); 1915 #endif 1916 log1p(0.0); 1917 log1pf(0.0f); 1918 log1pl(0.0l); 1919 log2(0.0); 1920 log2f(0.0f); 1921 log2l(0.0l); 1922 logb(0.0); 1923 logbf(0.0f); 1924 logbl(0.0l); 1925 lrint(0.0); 1926 lrintf(0.0f); 1927 lrintl(0.0l); 1928 lround(0.0); 1929 lroundf(0.0f); 1930 lroundl(0.0l); 1931 nan(0); 1932 nanf(0); 1933 nanl(0); 1934 nearbyint(0.0); 1935 nearbyintf(0.0f); 1936 nearbyintl(0.0l); 1937 nextafter(0.0, 0.0); 1938 nextafterf(0.0f, 0.0f); 1939 nextafterl(0.0l, 0.0l); 1940 nexttoward(0.0, 0.0); 1941 nexttowardf(0.0f, 0.0f); 1942 nexttowardl(0.0l, 0.0l); 1943 remainder(0.0, 0.0); 1944 remainderf(0.0f, 0.0f); 1945 remainderl(0.0l, 0.0l); 1946 remquo(0.0, 0.0, 0); 1947 remquof(0.0f, 0.0f, 0); 1948 remquol(0.0l, 0.0l, 0); 1949 rint(0.0); 1950 rintf(0.0f); 1951 rintl(0.0l); 1952 round(0.0); 1953 roundf(0.0f); 1954 roundl(0.0l); 1955 scalbln(0.0, 0l); 1956 scalblnf(0.0f, 0l); 1957 scalblnl(0.0l, 0l); 1958 scalbn(0.0, 0); 1959 scalbnf(0.0f, 0); 1960 scalbnl(0.0l, 0); 1961 tgamma(0.0); 1962 tgammaf(0.0f); 1963 tgammal(0.0l); 1964 trunc(0.0); 1965 truncf(0.0f); 1966 truncl(0.0l); 1967 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no]) 1968 ]) 1969 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1) 1970 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then 1971 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1, 1972 [Define if C99 functions or macros in <math.h> should be imported 1973 in <tr1/cmath> in namespace std::tr1.]) 1974 1975 case "${target_os}" in 1976 darwin*) 1977 AC_MSG_CHECKING([for ISO C99 rounding functions in <math.h>]) 1978 AC_CACHE_VAL(glibcxx_cv_c99_math_llround, [ 1979 AC_TRY_COMPILE([#include <math.h>], 1980 [llrint(0.0); 1981 llrintf(0.0f); 1982 llrintl(0.0l); 1983 llround(0.0); 1984 llroundf(0.0f); 1985 llroundl(0.0l); 1986 ], 1987 [glibcxx_cv_c99_math_llround=yes], 1988 [glibcxx_cv_c99_math_llround=no]) 1989 ]) 1990 AC_MSG_RESULT($glibcxx_cv_c99_math_llround) 1991 ;; 1992 esac 1993 if test x"$glibcxx_cv_c99_math_llround" = x"no"; then 1994 AC_DEFINE(_GLIBCXX_NO_C99_ROUNDING_FUNCS, 1, 1995 [Define if C99 llrint and llround functions are missing from <math.h>.]) 1996 fi 1997 fi 1998 1999 # Check for the existence of <inttypes.h> functions (NB: doesn't make 2000 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1). 2001 ac_c99_inttypes_tr1=no; 2002 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 2003 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>]) 2004 AC_TRY_COMPILE([#include <inttypes.h>], 2005 [intmax_t i, numer, denom, base; 2006 const char* s; 2007 char** endptr; 2008 intmax_t ret = imaxabs(i); 2009 imaxdiv_t dret = imaxdiv(numer, denom); 2010 ret = strtoimax(s, endptr, base); 2011 uintmax_t uret = strtoumax(s, endptr, base); 2012 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no]) 2013 fi 2014 AC_MSG_RESULT($ac_c99_inttypes_tr1) 2015 if test x"$ac_c99_inttypes_tr1" = x"yes"; then 2016 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1, 2017 [Define if C99 functions in <inttypes.h> should be imported in 2018 <tr1/cinttypes> in namespace std::tr1.]) 2019 fi 2020 2021 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't 2022 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1). 2023 ac_c99_inttypes_wchar_t_tr1=no; 2024 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 2025 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>]) 2026 AC_TRY_COMPILE([#include <inttypes.h>], 2027 [intmax_t base; 2028 const wchar_t* s; 2029 wchar_t** endptr; 2030 intmax_t ret = wcstoimax(s, endptr, base); 2031 uintmax_t uret = wcstoumax(s, endptr, base); 2032 ],[ac_c99_inttypes_wchar_t_tr1=yes], 2033 [ac_c99_inttypes_wchar_t_tr1=no]) 2034 fi 2035 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1) 2036 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then 2037 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1, 2038 [Define if wchar_t C99 functions in <inttypes.h> should be 2039 imported in <tr1/cinttypes> in namespace std::tr1.]) 2040 fi 2041 2042 # Check for the existence of the <stdbool.h> header. 2043 AC_CHECK_HEADERS(stdbool.h) 2044 2045 # Check for the existence of the <stdalign.h> header. 2046 AC_CHECK_HEADERS(stdalign.h) 2047 2048 CXXFLAGS="$ac_save_CXXFLAGS" 2049 AC_LANG_RESTORE 2050]) 2051 2052dnl 2053dnl Check for uchar.h and usability. 2054dnl 2055AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [ 2056 2057 # Test uchar.h. 2058 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no) 2059 2060 AC_LANG_SAVE 2061 AC_LANG_CPLUSPLUS 2062 ac_save_CXXFLAGS="$CXXFLAGS" 2063 CXXFLAGS="$CXXFLAGS -std=c++11" 2064 2065 if test x"$ac_has_uchar_h" = x"yes"; then 2066 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>]) 2067 AC_TRY_COMPILE([#include <uchar.h> 2068 #ifdef __STDC_UTF_16__ 2069 long i = __STDC_UTF_16__; 2070 #endif 2071 #ifdef __STDC_UTF_32__ 2072 long j = __STDC_UTF_32__; 2073 #endif 2074 namespace test 2075 { 2076 using ::c16rtomb; 2077 using ::c32rtomb; 2078 using ::mbrtoc16; 2079 using ::mbrtoc32; 2080 } 2081 ], 2082 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no]) 2083 else 2084 ac_c11_uchar_cxx11=no 2085 fi 2086 AC_MSG_RESULT($ac_c11_uchar_cxx11) 2087 if test x"$ac_c11_uchar_cxx11" = x"yes"; then 2088 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1, 2089 [Define if C11 functions in <uchar.h> should be imported into 2090 namespace std in <cuchar>.]) 2091 fi 2092 2093 CXXFLAGS="$ac_save_CXXFLAGS" 2094 AC_LANG_RESTORE 2095]) 2096 2097 2098dnl 2099dnl Check whether "/dev/random" and "/dev/urandom" are available for 2100dnl class std::random_device from C++ 2011 [rand.device], and 2101dnl random_device of "TR1" (Chapter 5.1, "Random number generation"). 2102dnl 2103AC_DEFUN([GLIBCXX_CHECK_DEV_RANDOM], [ 2104 2105 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for std::random_device]) 2106 AC_CACHE_VAL(glibcxx_cv_dev_random, [ 2107 if test -r /dev/random && test -r /dev/urandom; then 2108 ## For MSys environment the test above is detected as false-positive 2109 ## on mingw-targets. So disable it explicitly for them. 2110 case ${target_os} in 2111 *mingw*) glibcxx_cv_dev_random=no ;; 2112 *) glibcxx_cv_dev_random=yes ;; 2113 esac 2114 else 2115 glibcxx_cv_dev_random=no; 2116 fi 2117 ]) 2118 AC_MSG_RESULT($glibcxx_cv_dev_random) 2119 2120 if test x"$glibcxx_cv_dev_random" = x"yes"; then 2121 AC_DEFINE(_GLIBCXX_USE_DEV_RANDOM, 1, 2122 [Define if /dev/random and /dev/urandom are available for 2123 std::random_device.]) 2124 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1, 2125 [Define if /dev/random and /dev/urandom are available for 2126 the random_device of TR1 (Chapter 5.1).]) 2127 fi 2128 2129]) 2130 2131dnl 2132dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants. 2133dnl 2134AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [ 2135 2136 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [ 2137 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]], 2138 [#include <stdio.h>], 2139 [AC_MSG_ERROR([computing EOF failed])]) 2140 ]) 2141 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof, 2142 [Define to the value of the EOF integer constant.]) 2143 2144 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [ 2145 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]], 2146 [#include <stdio.h>], 2147 [AC_MSG_ERROR([computing SEEK_CUR failed])]) 2148 ]) 2149 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur, 2150 [Define to the value of the SEEK_CUR integer constant.]) 2151 2152 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [ 2153 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]], 2154 [#include <stdio.h>], 2155 [AC_MSG_ERROR([computing SEEK_END failed])]) 2156 ]) 2157 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end, 2158 [Define to the value of the SEEK_END integer constant.]) 2159]) 2160 2161dnl 2162dnl Check whether required C++ overloads are present in <stdio.h>. 2163dnl 2164AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [ 2165 2166 AC_LANG_SAVE 2167 AC_LANG_CPLUSPLUS 2168 # Use C++11 because a conforming <stdio.h> won't define gets for C++14, 2169 # and we don't need a declaration for C++14 anyway. 2170 ac_save_CXXFLAGS="$CXXFLAGS" 2171 CXXFLAGS="$CXXFLAGS -std=gnu++11" 2172 2173 AC_MSG_CHECKING([for gets declaration]) 2174 AC_CACHE_VAL(glibcxx_cv_gets, [ 2175 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2176 [#include <stdio.h> 2177 namespace test 2178 { 2179 using ::gets; 2180 } 2181 ])], 2182 [glibcxx_cv_gets=yes], 2183 [glibcxx_cv_gets=no] 2184 )]) 2185 2186 if test $glibcxx_cv_gets = yes; then 2187 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.]) 2188 fi 2189 AC_MSG_RESULT($glibcxx_cv_gets) 2190 2191 CXXFLAGS="$ac_save_CXXFLAGS" 2192 AC_LANG_RESTORE 2193]) 2194 2195dnl 2196dnl Check whether required C++11 overloads for floating point and integral 2197dnl types are present in <math.h>. 2198dnl 2199AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [ 2200 2201 AC_LANG_SAVE 2202 AC_LANG_CPLUSPLUS 2203 ac_save_CXXFLAGS="$CXXFLAGS" 2204 CXXFLAGS="$CXXFLAGS -std=c++11" 2205 2206 case "$host" in 2207 *-*-solaris2.*) 2208 # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch 2209 # 11996[67]-02 introduced the C++11 <math.h> floating point overloads. 2210 AC_MSG_CHECKING([for C++11 <math.h> floating point overloads]) 2211 AC_CACHE_VAL(glibcxx_cv_math11_fp_overload, [ 2212 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2213 [#include <math.h> 2214 #undef isfinite 2215 namespace std { 2216 inline bool isfinite(float __x) 2217 { return __builtin_isfinite(__x); } 2218 } 2219 ])], 2220 [glibcxx_cv_math11_fp_overload=no], 2221 [glibcxx_cv_math11_fp_overload=yes] 2222 )]) 2223 2224 # autoheader cannot handle indented templates. 2225 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP], 2226 [/* Define if all C++11 floating point overloads are available in <math.h>. */ 2227#if __cplusplus >= 201103L 2228#undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP 2229#endif]) 2230 2231 if test $glibcxx_cv_math11_fp_overload = yes; then 2232 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP) 2233 fi 2234 AC_MSG_RESULT([$glibcxx_cv_math11_fp_overload]) 2235 2236 # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch 2237 # 11996[67]-02 introduced the C++11 <math.h> integral type overloads. 2238 AC_MSG_CHECKING([for C++11 <math.h> integral type overloads]) 2239 AC_CACHE_VAL(glibcxx_cv_math11_int_overload, [ 2240 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2241 [#include <math.h> 2242 namespace std { 2243 template<typename _Tp> 2244 struct __is_integer; 2245 template<> 2246 struct __is_integer<int> 2247 { 2248 enum { __value = 1 }; 2249 }; 2250 } 2251 namespace __gnu_cxx { 2252 template<bool, typename> 2253 struct __enable_if; 2254 template<typename _Tp> 2255 struct __enable_if<true, _Tp> 2256 { typedef _Tp __type; }; 2257 } 2258 namespace std { 2259 template<typename _Tp> 2260 constexpr typename __gnu_cxx::__enable_if 2261 <__is_integer<_Tp>::__value, double>::__type 2262 log2(_Tp __x) 2263 { return __builtin_log2(__x); } 2264 } 2265 int 2266 main (void) 2267 { 2268 int i = 1000; 2269 return std::log2(i); 2270 } 2271 ])], 2272 [glibcxx_cv_math11_int_overload=no], 2273 [glibcxx_cv_math11_int_overload=yes] 2274 )]) 2275 2276 # autoheader cannot handle indented templates. 2277 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT], 2278 [/* Define if all C++11 integral type overloads are available in <math.h>. */ 2279#if __cplusplus >= 201103L 2280#undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT 2281#endif]) 2282 2283 if test $glibcxx_cv_math11_int_overload = yes; then 2284 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT) 2285 fi 2286 AC_MSG_RESULT([$glibcxx_cv_math11_int_overload]) 2287 ;; 2288 *) 2289 # If <math.h> defines the obsolete isinf(double) and isnan(double) 2290 # functions (instead of or as well as the C99 generic macros) then we 2291 # can't define std::isinf(double) and std::isnan(double) in <cmath> 2292 # and must use the ones from <math.h> instead. 2293 AC_MSG_CHECKING([for obsolete isinf function in <math.h>]) 2294 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf, [ 2295 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2296 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS 2297 #include <math.h> 2298 #undef isinf 2299 namespace std { 2300 using ::isinf; 2301 bool isinf(float); 2302 bool isinf(long double); 2303 } 2304 using std::isinf; 2305 bool b = isinf(0.0); 2306 ])], 2307 [glibcxx_cv_obsolete_isinf=yes], 2308 [glibcxx_cv_obsolete_isinf=no] 2309 )]) 2310 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf]) 2311 if test $glibcxx_cv_obsolete_isinf = yes; then 2312 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1, 2313 [Define if <math.h> defines obsolete isinf function.]) 2314 fi 2315 2316 AC_MSG_CHECKING([for obsolete isnan function in <math.h>]) 2317 AC_CACHE_VAL(glibcxx_cv_obsolete_isnan, [ 2318 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2319 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS 2320 #include <math.h> 2321 #undef isnan 2322 namespace std { 2323 using ::isnan; 2324 bool isnan(float); 2325 bool isnan(long double); 2326 } 2327 using std::isnan; 2328 bool b = isnan(0.0); 2329 ])], 2330 [glibcxx_cv_obsolete_isnan=yes], 2331 [glibcxx_cv_obsolete_isnan=no] 2332 )]) 2333 AC_MSG_RESULT([$glibcxx_cv_obsolete_isnan]) 2334 if test $glibcxx_cv_obsolete_isnan = yes; then 2335 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1, 2336 [Define if <math.h> defines obsolete isnan function.]) 2337 fi 2338 ;; 2339 esac 2340 2341 CXXFLAGS="$ac_save_CXXFLAGS" 2342 AC_LANG_RESTORE 2343]) 2344 2345dnl 2346dnl Check for what type of C headers to use. 2347dnl 2348dnl --enable-cheaders= [does stuff]. 2349dnl --disable-cheaders [does not do anything, really]. 2350dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)] 2351dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'. 2352dnl 2353AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [ 2354 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]], 2355 [construct "C" headers for g++], [permit c|c_std|c_global]) 2356 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders) 2357 2358 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders 2359 2360 # Allow overrides to configure.host here. 2361 if test $enable_cheaders = c_global; then 2362 c_compatibility=yes 2363 fi 2364 2365 AC_SUBST(C_INCLUDE_DIR) 2366 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c) 2367 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std) 2368 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global) 2369 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes) 2370]) 2371 2372 2373dnl 2374dnl Check for which locale library to use. The choice is mapped to 2375dnl a subdirectory of config/locale. 2376dnl 2377dnl Default is generic. 2378dnl 2379AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [ 2380 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]], 2381 [use MODEL for target locale package], 2382 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto]) 2383 2384 # Deal with gettext issues. Default to not using it (=no) until we detect 2385 # support for it later. Let the user turn it off via --e/d, but let that 2386 # default to on for easier handling. 2387 USE_NLS=no 2388 AC_ARG_ENABLE(nls, 2389 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]), 2390 [], 2391 [enable_nls=yes]) 2392 2393 # Either a known package, or "auto" 2394 if test $enable_clocale = no || test $enable_clocale = yes; then 2395 enable_clocale=auto 2396 fi 2397 enable_clocale_flag=$enable_clocale 2398 2399 # Probe for locale model to use if none specified. 2400 # Default to "generic". 2401 if test $enable_clocale_flag = auto; then 2402 case ${target_os} in 2403 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) 2404 enable_clocale_flag=gnu 2405 ;; 2406 darwin*) 2407 enable_clocale_flag=darwin 2408 ;; 2409 dragonfly* | freebsd*) 2410 enable_clocale_flag=dragonfly 2411 ;; 2412 openbsd*) 2413 enable_clocale_flag=newlib 2414 ;; 2415 *) 2416 if test x"$with_newlib" = x"yes"; then 2417 enable_clocale_flag=newlib 2418 else 2419 enable_clocale_flag=generic 2420 fi 2421 ;; 2422 esac 2423 fi 2424 2425 # Sanity check model, and test for special functionality. 2426 if test $enable_clocale_flag = gnu; then 2427 AC_EGREP_CPP([_GLIBCXX_ok], [ 2428 #include <features.h> 2429 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__) 2430 _GLIBCXX_ok 2431 #endif 2432 ], enable_clocale_flag=gnu, enable_clocale_flag=generic) 2433 2434 # Set it to scream when it hurts. 2435 ac_save_CFLAGS="$CFLAGS" 2436 CFLAGS="-Wimplicit-function-declaration -Werror" 2437 2438 # Use strxfrm_l if available. 2439 AC_TRY_COMPILE([#define _GNU_SOURCE 1 2440 #include <string.h> 2441 #include <locale.h>], 2442 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);], 2443 AC_DEFINE(HAVE_STRXFRM_L, 1, 2444 [Define if strxfrm_l is available in <string.h>.]),) 2445 2446 # Use strerror_l if available. 2447 AC_TRY_COMPILE([#define _GNU_SOURCE 1 2448 #include <string.h> 2449 #include <locale.h>], 2450 [__locale_t loc; strerror_l(5, loc);], 2451 AC_DEFINE(HAVE_STRERROR_L, 1, 2452 [Define if strerror_l is available in <string.h>.]),) 2453 2454 CFLAGS="$ac_save_CFLAGS" 2455 fi 2456 2457 # Perhaps use strerror_r if available, and strerror_l isn't. 2458 ac_save_CFLAGS="$CFLAGS" 2459 CFLAGS="-Wimplicit-function-declaration -Werror" 2460 AC_TRY_COMPILE([#define _GNU_SOURCE 1 2461 #include <string.h> 2462 #include <locale.h>], 2463 [char s[128]; strerror_r(5, s, 128);], 2464 AC_DEFINE(HAVE_STRERROR_R, 1, 2465 [Define if strerror_r is available in <string.h>.]),) 2466 CFLAGS="$ac_save_CFLAGS" 2467 2468 # Set configure bits for specified locale package 2469 AC_MSG_CHECKING([for C locale to use]) 2470 case ${enable_clocale_flag} in 2471 generic) 2472 AC_MSG_RESULT(generic) 2473 2474 CLOCALE_H=config/locale/generic/c_locale.h 2475 CLOCALE_CC=config/locale/generic/c_locale.cc 2476 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2477 CCOLLATE_CC=config/locale/generic/collate_members.cc 2478 CCTYPE_CC=config/locale/generic/ctype_members.cc 2479 CMESSAGES_H=config/locale/generic/messages_members.h 2480 CMESSAGES_CC=config/locale/generic/messages_members.cc 2481 CMONEY_CC=config/locale/generic/monetary_members.cc 2482 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2483 CTIME_H=config/locale/generic/time_members.h 2484 CTIME_CC=config/locale/generic/time_members.cc 2485 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2486 ;; 2487 darwin) 2488 AC_MSG_RESULT(darwin) 2489 2490 CLOCALE_H=config/locale/generic/c_locale.h 2491 CLOCALE_CC=config/locale/generic/c_locale.cc 2492 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2493 CCOLLATE_CC=config/locale/generic/collate_members.cc 2494 CCTYPE_CC=config/locale/darwin/ctype_members.cc 2495 CMESSAGES_H=config/locale/generic/messages_members.h 2496 CMESSAGES_CC=config/locale/generic/messages_members.cc 2497 CMONEY_CC=config/locale/generic/monetary_members.cc 2498 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2499 CTIME_H=config/locale/generic/time_members.h 2500 CTIME_CC=config/locale/generic/time_members.cc 2501 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2502 ;; 2503 2504 dragonfly) 2505 AC_MSG_RESULT(dragonfly or freebsd) 2506 2507 CLOCALE_H=config/locale/dragonfly/c_locale.h 2508 CLOCALE_CC=config/locale/dragonfly/c_locale.cc 2509 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc 2510 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc 2511 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc 2512 CMESSAGES_H=config/locale/generic/messages_members.h 2513 CMESSAGES_CC=config/locale/generic/messages_members.cc 2514 CMONEY_CC=config/locale/dragonfly/monetary_members.cc 2515 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc 2516 CTIME_H=config/locale/dragonfly/time_members.h 2517 CTIME_CC=config/locale/dragonfly/time_members.cc 2518 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2519 ;; 2520 2521 gnu) 2522 AC_MSG_RESULT(gnu) 2523 2524 # Declare intention to use gettext, and add support for specific 2525 # languages. 2526 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT 2527 ALL_LINGUAS="de fr" 2528 2529 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc. 2530 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no) 2531 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then 2532 USE_NLS=yes 2533 fi 2534 # Export the build objects. 2535 for ling in $ALL_LINGUAS; do \ 2536 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \ 2537 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \ 2538 done 2539 AC_SUBST(glibcxx_MOFILES) 2540 AC_SUBST(glibcxx_POFILES) 2541 2542 CLOCALE_H=config/locale/gnu/c_locale.h 2543 CLOCALE_CC=config/locale/gnu/c_locale.cc 2544 CCODECVT_CC=config/locale/gnu/codecvt_members.cc 2545 CCOLLATE_CC=config/locale/gnu/collate_members.cc 2546 CCTYPE_CC=config/locale/gnu/ctype_members.cc 2547 CMESSAGES_H=config/locale/gnu/messages_members.h 2548 CMESSAGES_CC=config/locale/gnu/messages_members.cc 2549 CMONEY_CC=config/locale/gnu/monetary_members.cc 2550 CNUMERIC_CC=config/locale/gnu/numeric_members.cc 2551 CTIME_H=config/locale/gnu/time_members.h 2552 CTIME_CC=config/locale/gnu/time_members.cc 2553 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h 2554 ;; 2555 ieee_1003.1-2001) 2556 AC_MSG_RESULT(IEEE 1003.1) 2557 2558 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h 2559 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc 2560 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2561 CCOLLATE_CC=config/locale/generic/collate_members.cc 2562 CCTYPE_CC=config/locale/generic/ctype_members.cc 2563 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h 2564 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc 2565 CMONEY_CC=config/locale/generic/monetary_members.cc 2566 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2567 CTIME_H=config/locale/generic/time_members.h 2568 CTIME_CC=config/locale/generic/time_members.cc 2569 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2570 ;; 2571 newlib) 2572 AC_MSG_RESULT(newlib) 2573 2574 CLOCALE_H=config/locale/generic/c_locale.h 2575 CLOCALE_CC=config/locale/generic/c_locale.cc 2576 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2577 CCOLLATE_CC=config/locale/generic/collate_members.cc 2578 CCTYPE_CC=config/locale/newlib/ctype_members.cc 2579 CMESSAGES_H=config/locale/generic/messages_members.h 2580 CMESSAGES_CC=config/locale/generic/messages_members.cc 2581 CMONEY_CC=config/locale/generic/monetary_members.cc 2582 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2583 CTIME_H=config/locale/generic/time_members.h 2584 CTIME_CC=config/locale/generic/time_members.cc 2585 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2586 ;; 2587 esac 2588 2589 # This is where the testsuite looks for locale catalogs, using the 2590 # -DLOCALEDIR define during testsuite compilation. 2591 glibcxx_localedir=${glibcxx_builddir}/po/share/locale 2592 AC_SUBST(glibcxx_localedir) 2593 2594 # A standalone libintl (e.g., GNU libintl) may be in use. 2595 if test $USE_NLS = yes; then 2596 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no) 2597 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no) 2598 fi 2599 if test $USE_NLS = yes; then 2600 AC_DEFINE(_GLIBCXX_USE_NLS, 1, 2601 [Define if NLS translations are to be used.]) 2602 fi 2603 2604 AC_SUBST(USE_NLS) 2605 AC_SUBST(CLOCALE_H) 2606 AC_SUBST(CMESSAGES_H) 2607 AC_SUBST(CCODECVT_CC) 2608 AC_SUBST(CCOLLATE_CC) 2609 AC_SUBST(CCTYPE_CC) 2610 AC_SUBST(CMESSAGES_CC) 2611 AC_SUBST(CMONEY_CC) 2612 AC_SUBST(CNUMERIC_CC) 2613 AC_SUBST(CTIME_H) 2614 AC_SUBST(CTIME_CC) 2615 AC_SUBST(CLOCALE_CC) 2616 AC_SUBST(CLOCALE_INTERNAL_H) 2617]) 2618 2619 2620dnl 2621dnl Check for which std::allocator base class to use. The choice is 2622dnl mapped from a subdirectory of include/ext. 2623dnl 2624dnl Default is new. 2625dnl 2626AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [ 2627 AC_MSG_CHECKING([for std::allocator base class]) 2628 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]], 2629 [use KIND for target std::allocator base], 2630 [permit new|malloc|mt|bitmap|pool|yes|no|auto]) 2631 2632 # If they didn't use this option switch, or if they specified --enable 2633 # with no specific model, we'll have to look for one. If they 2634 # specified --disable (???), do likewise. 2635 if test $enable_libstdcxx_allocator = no || 2636 test $enable_libstdcxx_allocator = yes; 2637 then 2638 enable_libstdcxx_allocator=auto 2639 fi 2640 2641 # Either a known package, or "auto". Auto implies the default choice 2642 # for a particular platform. 2643 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator 2644 2645 # Probe for host-specific support if no specific model is specified. 2646 # Default to "new". 2647 if test $enable_libstdcxx_allocator_flag = auto; then 2648 case ${target_os} in 2649 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) 2650 enable_libstdcxx_allocator_flag=new 2651 ;; 2652 *) 2653 enable_libstdcxx_allocator_flag=new 2654 ;; 2655 esac 2656 fi 2657 AC_MSG_RESULT($enable_libstdcxx_allocator_flag) 2658 2659 2660 # Set configure bits for specified locale package 2661 case ${enable_libstdcxx_allocator_flag} in 2662 bitmap) 2663 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h 2664 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator 2665 ;; 2666 malloc) 2667 ALLOCATOR_H=config/allocator/malloc_allocator_base.h 2668 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator 2669 ;; 2670 mt) 2671 ALLOCATOR_H=config/allocator/mt_allocator_base.h 2672 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc 2673 ;; 2674 new) 2675 ALLOCATOR_H=config/allocator/new_allocator_base.h 2676 ALLOCATOR_NAME=__gnu_cxx::new_allocator 2677 ;; 2678 pool) 2679 ALLOCATOR_H=config/allocator/pool_allocator_base.h 2680 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc 2681 ;; 2682 esac 2683 2684 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW, 2685 test $enable_libstdcxx_allocator_flag = new) 2686 AC_SUBST(ALLOCATOR_H) 2687 AC_SUBST(ALLOCATOR_NAME) 2688]) 2689 2690 2691dnl 2692dnl Check for whether the Boost-derived checks should be turned on. 2693dnl 2694dnl --enable-concept-checks turns them on. 2695dnl --disable-concept-checks leaves them off. 2696dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)] 2697dnl Where DEFAULT is either `yes' or `no'. 2698dnl 2699AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [ 2700 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks]) 2701 if test $enable_concept_checks = yes; then 2702 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1, 2703 [Define to use concept checking code from the boost libraries.]) 2704 fi 2705]) 2706 2707dnl 2708dnl Use extern templates. 2709dnl 2710dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1 2711dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0 2712 2713dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)] 2714dnl Where DEFAULT is `yes' or `no'. 2715dnl 2716AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [ 2717 2718 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template]) 2719 2720 AC_MSG_CHECKING([for extern template support]) 2721 AC_MSG_RESULT([$enable_extern_template]) 2722 2723 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes) 2724]) 2725 2726dnl 2727dnl Use vtable verification. 2728dnl 2729dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1 2730dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0 2731 2732dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)] 2733dnl Where DEFAULT is `yes' or `no'. 2734dnl 2735AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [ 2736 2737 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify]) 2738 2739 AC_MSG_CHECKING([for vtable verify support]) 2740 AC_MSG_RESULT([$enable_vtable_verify]) 2741 2742 vtv_cygmin=no 2743 if test $enable_vtable_verify = yes; then 2744 case ${target_os} in 2745 cygwin*|mingw32*) 2746 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end" 2747 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs" 2748 vtv_cygmin=yes 2749 ;; 2750 darwin*) 2751 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end" 2752 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs" 2753 ;; 2754 solaris2*) 2755 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end" 2756 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs" 2757 ;; 2758 *) 2759 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end" 2760 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs" 2761 ;; 2762 esac 2763 VTV_PCH_CXXFLAGS="-fvtable-verify=std" 2764 else 2765 VTV_CXXFLAGS= 2766 VTV_PCH_CXXFLAGS= 2767 VTV_CXXLINKFLAGS= 2768 fi 2769 2770 AC_SUBST(VTV_CXXFLAGS) 2771 AC_SUBST(VTV_PCH_CXXFLAGS) 2772 AC_SUBST(VTV_CXXLINKFLAGS) 2773 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes) 2774 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes) 2775]) 2776 2777dnl 2778dnl Check for parallel mode pre-requisites, including OpenMP support. 2779dnl 2780dnl + Usage: GLIBCXX_ENABLE_PARALLEL 2781dnl 2782AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [ 2783 2784 enable_parallel=no; 2785 2786 # See if configured libgomp/omp.h exists. (libgomp may be in 2787 # noconfigdirs but not explicitly disabled.) 2788 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then 2789 enable_parallel=yes; 2790 else 2791 AC_MSG_NOTICE([target-libgomp not built]) 2792 fi 2793 2794 AC_MSG_CHECKING([for parallel mode support]) 2795 AC_MSG_RESULT([$enable_parallel]) 2796]) 2797 2798 2799dnl 2800dnl Check for which I/O library to use: stdio, or something specific. 2801dnl 2802dnl Default is stdio. 2803dnl 2804AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [ 2805 AC_MSG_CHECKING([for underlying I/O to use]) 2806 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]], 2807 [use target-specific I/O package], [permit stdio]) 2808 2809 # Now that libio has been removed, you can have any color you want as long 2810 # as it's black. This is one big no-op until other packages are added, but 2811 # showing the framework never hurts. 2812 case ${enable_cstdio} in 2813 stdio) 2814 CSTDIO_H=config/io/c_io_stdio.h 2815 BASIC_FILE_H=config/io/basic_file_stdio.h 2816 BASIC_FILE_CC=config/io/basic_file_stdio.cc 2817 AC_MSG_RESULT(stdio) 2818 ;; 2819 esac 2820 2821 AC_SUBST(CSTDIO_H) 2822 AC_SUBST(BASIC_FILE_H) 2823 AC_SUBST(BASIC_FILE_CC) 2824]) 2825 2826 2827dnl 2828dnl Check for "unusual" flags to pass to the compiler while building. 2829dnl 2830dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing 2831dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc. 2832dnl --disable-cxx-flags passes nothing. 2833dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html 2834dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html 2835dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html 2836dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags) 2837dnl If "default flags" is an empty string, the effect is the same 2838dnl as --disable or --enable=no. 2839dnl 2840AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl 2841 AC_MSG_CHECKING([for extra compiler flags for building]) 2842 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS], 2843 [pass compiler FLAGS when building library], 2844 [case "x$enable_cxx_flags" in 2845 xno | x) enable_cxx_flags= ;; 2846 x-*) ;; 2847 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 2848 esac]) 2849 2850 # Run through flags (either default or command-line) and set anything 2851 # extra (e.g., #defines) that must accompany particular g++ options. 2852 if test -n "$enable_cxx_flags"; then 2853 for f in $enable_cxx_flags; do 2854 case "$f" in 2855 -fhonor-std) ;; 2856 -*) ;; 2857 *) # and we're trying to pass /what/ exactly? 2858 AC_MSG_ERROR([compiler flags start with a -]) ;; 2859 esac 2860 done 2861 fi 2862 2863 EXTRA_CXX_FLAGS="$enable_cxx_flags" 2864 AC_MSG_RESULT($EXTRA_CXX_FLAGS) 2865 AC_SUBST(EXTRA_CXX_FLAGS) 2866]) 2867 2868 2869dnl 2870dnl Check to see if debugging libraries are to be built. 2871dnl 2872dnl --enable-libstdcxx-debug 2873dnl builds a separate set of debugging libraries in addition to the 2874dnl normal (shared, static) libstdc++ binaries. 2875dnl 2876dnl --disable-libstdcxx-debug 2877dnl builds only one (non-debug) version of libstdc++. 2878dnl 2879dnl --enable-libstdcxx-debug-flags=FLAGS 2880dnl iff --enable-debug == yes, then use FLAGS to build the debug library. 2881dnl 2882dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)] 2883dnl Where DEFAULT is either `yes' or `no'. 2884dnl 2885AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [ 2886 AC_MSG_CHECKING([for additional debug build]) 2887 skip_debug_build= 2888 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library]) 2889 if test x$enable_libstdcxx_debug = xyes; then 2890 if test -f $toplevel_builddir/../stage_final \ 2891 && test -f $toplevel_builddir/../stage_current; then 2892 stage_final=`cat $toplevel_builddir/../stage_final` 2893 stage_current=`cat $toplevel_builddir/../stage_current` 2894 if test x$stage_current != x$stage_final ; then 2895 skip_debug_build=" (skipped for bootstrap stage $stage_current)" 2896 enable_libstdcxx_debug=no 2897 fi 2898 fi 2899 fi 2900 AC_MSG_RESULT($enable_libstdcxx_debug$skip_debug_build) 2901 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes) 2902]) 2903 2904 2905dnl 2906dnl Check for explicit debug flags. 2907dnl 2908dnl --enable-libstdcxx-debug-flags='-O1' 2909dnl is a general method for passing flags to be used when 2910dnl building debug libraries with --enable-libstdcxx-debug. 2911dnl 2912dnl --disable-libstdcxx-debug-flags does nothing. 2913dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags) 2914dnl If "default flags" is an empty string, the effect is the same 2915dnl as --disable or --enable=no. 2916dnl 2917AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [ 2918 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS], 2919 [pass compiler FLAGS when building debug library], 2920 [case "x$enable_libstdcxx_debug_flags" in 2921 xno | x) enable_libstdcxx_debug_flags= ;; 2922 x-*) ;; 2923 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 2924 esac]) 2925 2926 # Option parsed, now set things appropriately 2927 DEBUG_FLAGS="$enable_libstdcxx_debug_flags" 2928 AC_SUBST(DEBUG_FLAGS) 2929 2930 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS]) 2931]) 2932 2933 2934dnl 2935dnl Check if the user only wants a freestanding library implementation. 2936dnl 2937dnl --disable-hosted-libstdcxx will turn off most of the library build, 2938dnl installing only the headers required by [17.4.1.3] and the language 2939dnl support library. More than that will be built (to keep the Makefiles 2940dnl conveniently clean), but not installed. 2941dnl 2942dnl Sets: 2943dnl is_hosted (yes/no) 2944dnl 2945dnl Defines: 2946dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0) 2947dnl 2948AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [ 2949 AC_ARG_ENABLE([hosted-libstdcxx], 2950 AC_HELP_STRING([--disable-hosted-libstdcxx], 2951 [only build freestanding C++ runtime support]),, 2952 [case "$host" in 2953 arm*-*-symbianelf*) 2954 enable_hosted_libstdcxx=no 2955 ;; 2956 *) 2957 enable_hosted_libstdcxx=yes 2958 ;; 2959 esac]) 2960 if test "$enable_hosted_libstdcxx" = no; then 2961 AC_MSG_NOTICE([Only freestanding libraries will be built]) 2962 is_hosted=no 2963 hosted_define=0 2964 enable_abi_check=no 2965 enable_libstdcxx_pch=no 2966 else 2967 is_hosted=yes 2968 hosted_define=1 2969 fi 2970 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes) 2971 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define, 2972 [Define to 1 if a full hosted library is built, or 0 if freestanding.]) 2973]) 2974 2975 2976dnl 2977dnl Check if the user wants a non-verbose library implementation. 2978dnl 2979dnl --disable-libstdcxx-verbose will turn off descriptive messages to 2980dnl standard error on termination. 2981dnl 2982dnl Defines: 2983dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0) 2984dnl 2985AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [ 2986 AC_ARG_ENABLE([libstdcxx-verbose], 2987 AC_HELP_STRING([--disable-libstdcxx-verbose], 2988 [disable termination messages to standard error]),, 2989 [enable_libstdcxx_verbose=yes]) 2990 if test x"$enable_libstdcxx_verbose" = xyes; then 2991 verbose_define=1 2992 else 2993 AC_MSG_NOTICE([verbose termination messages are disabled]) 2994 verbose_define=0 2995 fi 2996 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define, 2997 [Define to 1 if a verbose library is built, or 0 otherwise.]) 2998]) 2999 3000 3001dnl 3002dnl Check for template specializations for the 'long long' type. 3003dnl The result determines only whether 'long long' I/O is enabled; things 3004dnl like numeric_limits<> specializations are always available. 3005dnl 3006dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG 3007dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined 3008dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)] 3009dnl Where DEFAULT is either `yes' or `no'. 3010dnl 3011AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [ 3012 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long']) 3013 if test $enable_long_long = yes; then 3014 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1, 3015 [Define if code specialized for long long should be used.]) 3016 fi 3017 AC_MSG_CHECKING([for enabled long long specializations]) 3018 AC_MSG_RESULT([$enable_long_long]) 3019]) 3020 3021 3022dnl 3023dnl Check for decimal floating point. 3024dnl See: 3025dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float 3026dnl 3027dnl This checks to see if the host supports decimal floating point types. 3028dnl 3029dnl Defines: 3030dnl _GLIBCXX_USE_DECIMAL_FLOAT 3031dnl 3032AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [ 3033 3034 # Fake what AC_TRY_COMPILE does, without linking as this is 3035 # unnecessary for this test. 3036 3037 cat > conftest.$ac_ext << EOF 3038[#]line __oline__ "configure" 3039int main() 3040{ 3041 _Decimal32 d1; 3042 _Decimal64 d2; 3043 _Decimal128 d3; 3044 return 0; 3045} 3046EOF 3047 3048 AC_MSG_CHECKING([for ISO/IEC TR 24733 ]) 3049 if AC_TRY_EVAL(ac_compile); then 3050 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1, 3051 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.]) 3052 enable_dfp=yes 3053 else 3054 enable_dfp=no 3055 fi 3056 AC_MSG_RESULT($enable_dfp) 3057 rm -f conftest* 3058]) 3059 3060dnl 3061dnl Check for GNU 128-bit integer and floating point types. 3062dnl 3063dnl Note: also checks that the types aren't standard types. 3064dnl 3065dnl Defines: 3066dnl _GLIBCXX_USE_INT128 3067dnl ENABLE_FLOAT128 3068dnl 3069AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [ 3070 3071 AC_LANG_SAVE 3072 AC_LANG_CPLUSPLUS 3073 3074 # Fake what AC_TRY_COMPILE does, without linking as this is 3075 # unnecessary for this test. 3076 3077 cat > conftest.$ac_ext << EOF 3078[#]line __oline__ "configure" 3079template<typename T1, typename T2> 3080 struct same 3081 { typedef T2 type; }; 3082 3083template<typename T> 3084 struct same<T, T>; 3085 3086int main() 3087{ 3088 typename same<long, __int128>::type i1; 3089 typename same<long long, __int128>::type i2; 3090} 3091EOF 3092 3093 AC_MSG_CHECKING([for __int128]) 3094 if AC_TRY_EVAL(ac_compile); then 3095 AC_DEFINE(_GLIBCXX_USE_INT128, 1, 3096 [Define if __int128 is supported on this host.]) 3097 enable_int128=yes 3098 else 3099 enable_int128=no 3100 fi 3101 AC_MSG_RESULT($enable_int128) 3102 rm -f conftest* 3103 3104 cat > conftest.$ac_ext << EOF 3105[#]line __oline__ "configure" 3106template<typename T1, typename T2> 3107 struct same 3108 { typedef T2 type; }; 3109 3110template<typename T> 3111 struct same<T, T>; 3112 3113int main() 3114{ 3115 typename same<double, __float128>::type f1; 3116 typename same<long double, __float128>::type f2; 3117} 3118EOF 3119 3120 AC_MSG_CHECKING([for __float128]) 3121 if AC_TRY_EVAL(ac_compile); then 3122 enable_float128=yes 3123 else 3124 enable_float128=no 3125 fi 3126 AC_MSG_RESULT($enable_float128) 3127 GLIBCXX_CONDITIONAL(ENABLE_FLOAT128, test $enable_float128 = yes) 3128 rm -f conftest* 3129 3130 AC_LANG_RESTORE 3131]) 3132 3133dnl 3134dnl Check for template specializations for the 'wchar_t' type. 3135dnl 3136dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T 3137dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined 3138dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)] 3139dnl Where DEFAULT is either `yes' or `no'. 3140dnl 3141dnl Necessary support must also be present. 3142dnl 3143AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [ 3144 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t']) 3145 3146 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos. 3147 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no) 3148 AC_MSG_CHECKING([for mbstate_t]) 3149 AC_TRY_COMPILE([#include <wchar.h>], 3150 [mbstate_t teststate;], 3151 have_mbstate_t=yes, have_mbstate_t=no) 3152 AC_MSG_RESULT($have_mbstate_t) 3153 if test x"$have_mbstate_t" = xyes; then 3154 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.]) 3155 fi 3156 3157 # Test it always, for use in GLIBCXX_ENABLE_C99, together with 3158 # ac_has_wchar_h. 3159 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no) 3160 3161 if test x"$enable_wchar_t" = x"yes"; then 3162 3163 AC_LANG_SAVE 3164 AC_LANG_CPLUSPLUS 3165 3166 if test x"$ac_has_wchar_h" = xyes && 3167 test x"$ac_has_wctype_h" = xyes; then 3168 AC_TRY_COMPILE([#include <wchar.h> 3169 #include <stddef.h> 3170 wint_t i; 3171 long l = WEOF; 3172 long j = WCHAR_MIN; 3173 long k = WCHAR_MAX; 3174 namespace test 3175 { 3176 using ::btowc; 3177 using ::fgetwc; 3178 using ::fgetws; 3179 using ::fputwc; 3180 using ::fputws; 3181 using ::fwide; 3182 using ::fwprintf; 3183 using ::fwscanf; 3184 using ::getwc; 3185 using ::getwchar; 3186 using ::mbrlen; 3187 using ::mbrtowc; 3188 using ::mbsinit; 3189 using ::mbsrtowcs; 3190 using ::putwc; 3191 using ::putwchar; 3192 using ::swprintf; 3193 using ::swscanf; 3194 using ::ungetwc; 3195 using ::vfwprintf; 3196 using ::vswprintf; 3197 using ::vwprintf; 3198 using ::wcrtomb; 3199 using ::wcscat; 3200 using ::wcschr; 3201 using ::wcscmp; 3202 using ::wcscoll; 3203 using ::wcscpy; 3204 using ::wcscspn; 3205 using ::wcsftime; 3206 using ::wcslen; 3207 using ::wcsncat; 3208 using ::wcsncmp; 3209 using ::wcsncpy; 3210 using ::wcspbrk; 3211 using ::wcsrchr; 3212 using ::wcsrtombs; 3213 using ::wcsspn; 3214 using ::wcsstr; 3215 using ::wcstod; 3216 using ::wcstok; 3217 using ::wcstol; 3218 using ::wcstoul; 3219 using ::wcsxfrm; 3220 using ::wctob; 3221 using ::wmemchr; 3222 using ::wmemcmp; 3223 using ::wmemcpy; 3224 using ::wmemmove; 3225 using ::wmemset; 3226 using ::wprintf; 3227 using ::wscanf; 3228 } 3229 ],[],[], [enable_wchar_t=no]) 3230 else 3231 enable_wchar_t=no 3232 fi 3233 3234 AC_LANG_RESTORE 3235 fi 3236 3237 if test x"$enable_wchar_t" = x"yes"; then 3238 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1, 3239 [Define if code specialized for wchar_t should be used.]) 3240 fi 3241 3242 AC_MSG_CHECKING([for enabled wchar_t specializations]) 3243 AC_MSG_RESULT([$enable_wchar_t]) 3244]) 3245 3246 3247dnl 3248dnl Check to see if building and using a C++ precompiled header can be done. 3249dnl 3250dnl --enable-libstdcxx-pch=yes 3251dnl default, this shows intent to use stdc++.h.gch If it looks like it 3252dnl may work, after some light-hearted attempts to puzzle out compiler 3253dnl support, flip bits on in include/Makefile.am 3254dnl 3255dnl --disable-libstdcxx-pch 3256dnl turns off attempts to use or build stdc++.h.gch. 3257dnl 3258dnl Substs: 3259dnl glibcxx_PCHFLAGS 3260dnl 3261AC_DEFUN([GLIBCXX_ENABLE_PCH], [ 3262 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers]) 3263 if test $enable_libstdcxx_pch = yes; then 3264 AC_CACHE_CHECK([for compiler with PCH support], 3265 [glibcxx_cv_prog_CXX_pch], 3266 [ac_save_CXXFLAGS="$CXXFLAGS" 3267 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated" 3268 AC_LANG_SAVE 3269 AC_LANG_CPLUSPLUS 3270 echo '#include <math.h>' > conftest.h 3271 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \ 3272 -o conftest.h.gch 1>&5 2>&1 && 3273 echo '#error "pch failed"' > conftest.h && 3274 echo '#include "conftest.h"' > conftest.cc && 3275 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ; 3276 then 3277 glibcxx_cv_prog_CXX_pch=yes 3278 else 3279 glibcxx_cv_prog_CXX_pch=no 3280 fi 3281 rm -f conftest* 3282 CXXFLAGS=$ac_save_CXXFLAGS 3283 AC_LANG_RESTORE 3284 ]) 3285 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch 3286 fi 3287 3288 AC_MSG_CHECKING([for enabled PCH]) 3289 AC_MSG_RESULT([$enable_libstdcxx_pch]) 3290 3291 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes) 3292 if test $enable_libstdcxx_pch = yes; then 3293 glibcxx_PCHFLAGS="-include bits/stdc++.h" 3294 else 3295 glibcxx_PCHFLAGS="" 3296 fi 3297 AC_SUBST(glibcxx_PCHFLAGS) 3298]) 3299 3300 3301dnl 3302dnl Check for atomic builtins. 3303dnl See: 3304dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html 3305dnl 3306dnl This checks to see if the host supports the compiler-generated 3307dnl builtins for atomic operations for various integral sizes. Note, this 3308dnl is intended to be an all-or-nothing switch, so all the atomic operations 3309dnl that are used should be checked. 3310dnl 3311dnl Note: 3312dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD. 3313dnl 3314AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [ 3315 AC_LANG_SAVE 3316 AC_LANG_CPLUSPLUS 3317 old_CXXFLAGS="$CXXFLAGS" 3318 3319 # Do link tests if possible, instead asm tests, limited to some platforms 3320 # see discussion in PR target/40134, PR libstdc++/40133 and the thread 3321 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html 3322 atomic_builtins_link_tests=no 3323 if test x$gcc_no_link != xyes; then 3324 # Can do link tests. Limit to some tested platforms 3325 case "$host" in 3326 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*) 3327 atomic_builtins_link_tests=yes 3328 ;; 3329 esac 3330 fi 3331 3332 if test x$atomic_builtins_link_tests = xyes; then 3333 3334 # Do link tests. 3335 3336 CXXFLAGS="$CXXFLAGS -fno-exceptions" 3337 3338 AC_MSG_CHECKING([for atomic builtins for bool]) 3339 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [ 3340 AC_TRY_LINK( 3341 [ ], 3342 [typedef bool atomic_type; 3343 atomic_type c1; 3344 atomic_type c2; 3345 atomic_type c3(0); 3346 // N.B. __atomic_fetch_add is not supported for bool. 3347 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3348 __ATOMIC_RELAXED); 3349 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3350 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3351 ], 3352 [glibcxx_cv_atomic_bool=yes], 3353 [glibcxx_cv_atomic_bool=no]) 3354 ]) 3355 AC_MSG_RESULT($glibcxx_cv_atomic_bool) 3356 3357 AC_MSG_CHECKING([for atomic builtins for short]) 3358 AC_CACHE_VAL(glibcxx_cv_atomic_short, [ 3359 AC_TRY_LINK( 3360 [ ], 3361 [typedef short atomic_type; 3362 atomic_type c1; 3363 atomic_type c2; 3364 atomic_type c3(0); 3365 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3366 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3367 __ATOMIC_RELAXED); 3368 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3369 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3370 ], 3371 [glibcxx_cv_atomic_short=yes], 3372 [glibcxx_cv_atomic_short=no]) 3373 ]) 3374 AC_MSG_RESULT($glibcxx_cv_atomic_short) 3375 3376 AC_MSG_CHECKING([for atomic builtins for int]) 3377 AC_CACHE_VAL(glibcxx_cv_atomic_int, [ 3378 AC_TRY_LINK( 3379 [ ], 3380 [typedef int atomic_type; 3381 atomic_type c1; 3382 atomic_type c2; 3383 atomic_type c3(0); 3384 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3385 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3386 __ATOMIC_RELAXED); 3387 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3388 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3389 ], 3390 [glibcxx_cv_atomic_int=yes], 3391 [glibcxx_cv_atomic_int=no]) 3392 ]) 3393 AC_MSG_RESULT($glibcxx_cv_atomic_int) 3394 3395 AC_MSG_CHECKING([for atomic builtins for long long]) 3396 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [ 3397 AC_TRY_LINK( 3398 [ ], 3399 [typedef long long atomic_type; 3400 atomic_type c1; 3401 atomic_type c2; 3402 atomic_type c3(0); 3403 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3404 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3405 __ATOMIC_RELAXED); 3406 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3407 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3408 ], 3409 [glibcxx_cv_atomic_long_long=yes], 3410 [glibcxx_cv_atomic_long_long=no]) 3411 ]) 3412 AC_MSG_RESULT($glibcxx_cv_atomic_long_long) 3413 3414 else 3415 3416 # Do asm tests. 3417 3418 # Compile unoptimized. 3419 CXXFLAGS='-O0 -S' 3420 3421 # Fake what AC_TRY_COMPILE does. 3422 3423 cat > conftest.$ac_ext << EOF 3424[#]line __oline__ "configure" 3425int main() 3426{ 3427 typedef bool atomic_type; 3428 atomic_type c1; 3429 atomic_type c2; 3430 atomic_type c3(0); 3431 // N.B. __atomic_fetch_add is not supported for bool. 3432 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3433 __ATOMIC_RELAXED); 3434 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3435 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3436 3437 return 0; 3438} 3439EOF 3440 3441 AC_MSG_CHECKING([for atomic builtins for bool]) 3442 if AC_TRY_EVAL(ac_compile); then 3443 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3444 glibcxx_cv_atomic_bool=no 3445 else 3446 glibcxx_cv_atomic_bool=yes 3447 fi 3448 fi 3449 AC_MSG_RESULT($glibcxx_cv_atomic_bool) 3450 rm -f conftest* 3451 3452 cat > conftest.$ac_ext << EOF 3453[#]line __oline__ "configure" 3454int main() 3455{ 3456 typedef short atomic_type; 3457 atomic_type c1; 3458 atomic_type c2; 3459 atomic_type c3(0); 3460 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3461 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3462 __ATOMIC_RELAXED); 3463 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3464 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3465 3466 return 0; 3467} 3468EOF 3469 3470 AC_MSG_CHECKING([for atomic builtins for short]) 3471 if AC_TRY_EVAL(ac_compile); then 3472 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3473 glibcxx_cv_atomic_short=no 3474 else 3475 glibcxx_cv_atomic_short=yes 3476 fi 3477 fi 3478 AC_MSG_RESULT($glibcxx_cv_atomic_short) 3479 rm -f conftest* 3480 3481 cat > conftest.$ac_ext << EOF 3482[#]line __oline__ "configure" 3483int main() 3484{ 3485 // NB: _Atomic_word not necessarily int. 3486 typedef int atomic_type; 3487 atomic_type c1; 3488 atomic_type c2; 3489 atomic_type c3(0); 3490 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3491 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3492 __ATOMIC_RELAXED); 3493 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3494 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3495 3496 return 0; 3497} 3498EOF 3499 3500 AC_MSG_CHECKING([for atomic builtins for int]) 3501 if AC_TRY_EVAL(ac_compile); then 3502 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3503 glibcxx_cv_atomic_int=no 3504 else 3505 glibcxx_cv_atomic_int=yes 3506 fi 3507 fi 3508 AC_MSG_RESULT($glibcxx_cv_atomic_int) 3509 rm -f conftest* 3510 3511 cat > conftest.$ac_ext << EOF 3512[#]line __oline__ "configure" 3513int main() 3514{ 3515 typedef long long atomic_type; 3516 atomic_type c1; 3517 atomic_type c2; 3518 atomic_type c3(0); 3519 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3520 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3521 __ATOMIC_RELAXED); 3522 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3523 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3524 3525 return 0; 3526} 3527EOF 3528 3529 AC_MSG_CHECKING([for atomic builtins for long long]) 3530 if AC_TRY_EVAL(ac_compile); then 3531 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3532 glibcxx_cv_atomic_long_long=no 3533 else 3534 glibcxx_cv_atomic_long_long=yes 3535 fi 3536 fi 3537 AC_MSG_RESULT($glibcxx_cv_atomic_long_long) 3538 rm -f conftest* 3539 3540 fi 3541 3542 CXXFLAGS="$old_CXXFLAGS" 3543 AC_LANG_RESTORE 3544 3545 # Set atomicity_dir to builtins if all but the long long test above passes, 3546 # or if the builtins were already chosen (e.g. by configure.host). 3547 if { test "$glibcxx_cv_atomic_bool" = yes \ 3548 && test "$glibcxx_cv_atomic_short" = yes \ 3549 && test "$glibcxx_cv_atomic_int" = yes; } \ 3550 || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then 3551 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1, 3552 [Define if the compiler supports C++11 atomics.]) 3553 atomicity_dir=cpu/generic/atomicity_builtins 3554 fi 3555 3556 # If still generic, set to mutex. 3557 if test $atomicity_dir = "cpu/generic" ; then 3558 atomicity_dir=cpu/generic/atomicity_mutex 3559 AC_MSG_WARN([No native atomic operations are provided for this platform.]) 3560 if test "x$target_thread_file" = xsingle; then 3561 AC_MSG_WARN([They cannot be faked when thread support is disabled.]) 3562 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.]) 3563 else 3564 AC_MSG_WARN([They will be faked using a mutex.]) 3565 AC_MSG_WARN([Performance of certain classes will degrade as a result.]) 3566 fi 3567 fi 3568 3569]) 3570 3571dnl 3572dnl Set default lock policy for synchronizing shared_ptr reference counting. 3573dnl 3574dnl --with-libstdcxx-lock-policy=auto 3575dnl Use atomic operations for shared_ptr reference counting only if 3576dnl the default target supports atomic compare-and-swap. 3577dnl --with-libstdcxx-lock-policy=atomic 3578dnl Use atomic operations for shared_ptr reference counting. 3579dnl --with-libstdcxx-lock-policy=mutex 3580dnl Use a mutex to synchronize shared_ptr reference counting. 3581dnl 3582dnl This controls the value of __gnu_cxx::__default_lock_policy, which 3583dnl determines how shared_ptr reference counts are synchronized. 3584dnl The option "atomic" means that atomic operations should be used, 3585dnl "mutex" means that a mutex will be used. The default option, "auto", 3586dnl will check if the target supports the compiler-generated builtins 3587dnl for atomic compare-and-swap operations for 2-byte and 4-byte integers, 3588dnl and will use "atomic" if supported, "mutex" otherwise. 3589dnl This option is ignored if the thread model used by GCC is "single", 3590dnl as no synchronization is used at all in that case. 3591dnl This option affects the library ABI (except in the "single" thread model). 3592dnl 3593dnl Defines _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY to 1 if atomics should be used. 3594dnl 3595AC_DEFUN([GLIBCXX_ENABLE_LOCK_POLICY], [ 3596 3597 AC_ARG_WITH([libstdcxx-lock-policy], 3598 AC_HELP_STRING([--with-libstdcxx-lock-policy={atomic,mutex,auto}], 3599 [synchronization policy for shared_ptr reference counting [default=auto]]), 3600 [libstdcxx_atomic_lock_policy=$withval], 3601 [libstdcxx_atomic_lock_policy=auto]) 3602 3603 case "$libstdcxx_atomic_lock_policy" in 3604 atomic|mutex|auto) ;; 3605 *) AC_MSG_ERROR([Invalid argument for --with-libstdcxx-lock-policy]) ;; 3606 esac 3607 AC_MSG_CHECKING([for lock policy for shared_ptr reference counts]) 3608 3609 if test x"$libstdcxx_atomic_lock_policy" = x"auto"; then 3610 AC_LANG_SAVE 3611 AC_LANG_CPLUSPLUS 3612 ac_save_CXXFLAGS="$CXXFLAGS" 3613 3614 dnl Why do we care about 2-byte CAS on targets with 4-byte _Atomic_word?! 3615 AC_TRY_COMPILE([ 3616 #if ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 3617 # error "No 2-byte compare-and-swap" 3618 #elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 3619 # error "No 4-byte compare-and-swap" 3620 #endif 3621 ],, 3622 [libstdcxx_atomic_lock_policy=atomic], 3623 [libstdcxx_atomic_lock_policy=mutex]) 3624 AC_LANG_RESTORE 3625 CXXFLAGS="$ac_save_CXXFLAGS" 3626 fi 3627 3628 if test x"$libstdcxx_atomic_lock_policy" = x"atomic"; then 3629 AC_MSG_RESULT(atomic) 3630 AC_DEFINE(HAVE_ATOMIC_LOCK_POLICY,1, 3631 [Defined if shared_ptr reference counting should use atomic operations.]) 3632 else 3633 AC_MSG_RESULT(mutex) 3634 fi 3635 3636]) 3637 3638dnl 3639dnl Allow visibility attributes to be used on namespaces, objects, etc. 3640dnl 3641dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes. 3642dnl --disable-libstdcxx-visibility turns off all use of visibility attributes. 3643dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)] 3644dnl Where DEFAULT is 'yes'. 3645dnl 3646AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [ 3647GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage]) 3648 3649if test x$enable_libstdcxx_visibility = xyes ; then 3650 dnl all hail libgfortran 3651 dnl Check whether the target supports hidden visibility. 3652 AC_CACHE_CHECK([whether the target supports hidden visibility], 3653 glibcxx_cv_have_attribute_visibility, [ 3654 save_CFLAGS="$CFLAGS" 3655 CFLAGS="$CFLAGS -Werror" 3656 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }], 3657 [], glibcxx_cv_have_attribute_visibility=yes, 3658 glibcxx_cv_have_attribute_visibility=no) 3659 CFLAGS="$save_CFLAGS"]) 3660 if test $glibcxx_cv_have_attribute_visibility = no; then 3661 enable_libstdcxx_visibility=no 3662 fi 3663fi 3664 3665GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes) 3666AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility]) 3667]) 3668 3669 3670dnl 3671dnl Add version tags to symbols in shared library (or not), additionally 3672dnl marking other symbols as private/local (or not). 3673dnl 3674dnl Sets libtool_VERSION, and determines shared library SONAME. 3675dnl 3676dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no. 3677dnl 3678dnl --enable-symvers=style adds a version script to the linker call when 3679dnl creating the shared library. The choice of version script is 3680dnl controlled by 'style'. 3681dnl --disable-symvers does not. 3682dnl 3683dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)] 3684dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to 3685dnl choose a default style based on linker characteristics. Passing 3686dnl 'no' disables versioning. 3687dnl 3688AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [ 3689 3690GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]], 3691 [enables symbol versioning of the shared library], 3692 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun]) 3693 3694# If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we 3695# don't know enough about $LD to do tricks... 3696AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES]) 3697# Sun style symbol versions needs GNU c++filt for make_sunver.pl to work 3698# with extern "C++" in version scripts. 3699AC_REQUIRE([GCC_PROG_GNU_CXXFILT]) 3700 3701# Turn a 'yes' into a suitable default. 3702if test x$enable_symvers = xyes ; then 3703 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then 3704 enable_symvers=no 3705 else 3706 if test $with_gnu_ld = yes ; then 3707 case ${target_os} in 3708 hpux*) 3709 enable_symvers=no ;; 3710 *) 3711 enable_symvers=gnu ;; 3712 esac 3713 else 3714 case ${target_os} in 3715 darwin*) 3716 enable_symvers=darwin ;; 3717 # Sun symbol versioning exists since Solaris 2.5. 3718 solaris2.[[5-9]]* | solaris2.1[[0-9]]*) 3719 # make_sunver.pl needs GNU c++filt to support extern "C++" in 3720 # version scripts, so disable symbol versioning if none can be 3721 # found. 3722 if test -z "$ac_cv_path_CXXFILT"; then 3723 AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) 3724 AC_MSG_WARN([=== no GNU c++filt could be found.]) 3725 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3726 enable_symvers=no 3727 else 3728 enable_symvers=sun 3729 fi 3730 ;; 3731 *) 3732 enable_symvers=no ;; 3733 esac 3734 fi 3735 fi 3736fi 3737 3738# Check to see if 'darwin' or 'darwin-export' can win. 3739if test x$enable_symvers = xdarwin-export ; then 3740 enable_symvers=darwin 3741fi 3742 3743# Check if 'sun' was requested on non-Solaris 2 platforms. 3744if test x$enable_symvers = xsun ; then 3745 case ${target_os} in 3746 solaris2*) 3747 # All fine. 3748 ;; 3749 *) 3750 # Unlikely to work. 3751 AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) 3752 AC_MSG_WARN([=== you are not targetting Solaris 2.]) 3753 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3754 enable_symvers=no 3755 ;; 3756 esac 3757fi 3758 3759# Check to see if 'gnu' can win. 3760if test $enable_symvers = gnu || 3761 test $enable_symvers = gnu-versioned-namespace || 3762 test $enable_symvers = sun; then 3763 # Check to see if libgcc_s exists, indicating that shared libgcc is possible. 3764 AC_MSG_CHECKING([for shared libgcc]) 3765 ac_save_CFLAGS="$CFLAGS" 3766 CFLAGS=' -lgcc_s' 3767 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no) 3768 CFLAGS="$ac_save_CFLAGS" 3769 if test $glibcxx_shared_libgcc = no; then 3770 cat > conftest.c <<EOF 3771int main (void) { return 0; } 3772EOF 3773changequote(,)dnl 3774 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ 3775 -shared -shared-libgcc -o conftest.so \ 3776 conftest.c -v 2>&1 >/dev/null \ 3777 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` 3778changequote([,])dnl 3779 rm -f conftest.c conftest.so 3780 if test x${glibcxx_libgcc_s_suffix+set} = xset; then 3781 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix" 3782 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes) 3783 CFLAGS="$ac_save_CFLAGS" 3784 fi 3785 fi 3786 AC_MSG_RESULT($glibcxx_shared_libgcc) 3787 3788 # For GNU ld, we need at least this version. The format is described in 3789 # GLIBCXX_CHECK_LINKER_FEATURES above. 3790 glibcxx_min_gnu_ld_version=21400 3791 3792 # If no shared libgcc, can't win. 3793 if test $glibcxx_shared_libgcc != yes; then 3794 AC_MSG_WARN([=== You have requested GNU symbol versioning, but]) 3795 AC_MSG_WARN([=== you are not building a shared libgcc_s.]) 3796 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3797 enable_symvers=no 3798 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then 3799 : All interesting versions of Sun ld support sun style symbol versioning. 3800 elif test $with_gnu_ld != yes ; then 3801 # just fail for now 3802 AC_MSG_WARN([=== You have requested GNU symbol versioning, but]) 3803 AC_MSG_WARN([=== you are not using the GNU linker.]) 3804 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3805 enable_symvers=no 3806 elif test $glibcxx_ld_is_gold = yes ; then 3807 : All versions of gold support symbol versioning. 3808 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then 3809 # The right tools, the right setup, but too old. Fallbacks? 3810 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for) 3811 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.) 3812 AC_MSG_WARN(=== You would need to upgrade your binutils to version) 3813 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.) 3814 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3815 enable_symvers=no 3816 fi 3817fi 3818 3819# For libtool versioning info, format is CURRENT:REVISION:AGE 3820libtool_VERSION=6:28:0 3821 3822# Everything parsed; figure out what files and settings to use. 3823case $enable_symvers in 3824 no) 3825 SYMVER_FILE=config/abi/pre/none.ver 3826 ;; 3827 gnu) 3828 SYMVER_FILE=config/abi/pre/gnu.ver 3829 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1, 3830 [Define to use GNU versioning in the shared library.]) 3831 ;; 3832 gnu-versioned-namespace) 3833 libtool_VERSION=8:0:0 3834 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver 3835 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1, 3836 [Define to use GNU namespace versioning in the shared library.]) 3837 ;; 3838 darwin) 3839 SYMVER_FILE=config/abi/pre/gnu.ver 3840 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1, 3841 [Define to use darwin versioning in the shared library.]) 3842 ;; 3843 sun) 3844 SYMVER_FILE=config/abi/pre/gnu.ver 3845 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1, 3846 [Define to use Sun versioning in the shared library.]) 3847 ;; 3848esac 3849 3850if test x$enable_symvers != xno ; then 3851 AC_DEFINE(_GLIBCXX_SYMVER, 1, 3852 [Define to use symbol versioning in the shared library.]) 3853fi 3854 3855AC_CACHE_CHECK([whether the target supports .symver directive], 3856 glibcxx_cv_have_as_symver_directive, [ 3857 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");], 3858 [], glibcxx_cv_have_as_symver_directive=yes, 3859 glibcxx_cv_have_as_symver_directive=no)]) 3860if test $glibcxx_cv_have_as_symver_directive = yes; then 3861 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1, 3862 [Define to 1 if the target assembler supports .symver directive.]) 3863fi 3864 3865AC_SUBST(SYMVER_FILE) 3866AC_SUBST(port_specific_symbol_files) 3867GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no) 3868GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu) 3869GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace) 3870GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin) 3871GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun) 3872AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers) 3873 3874if test $enable_symvers != no ; then 3875 case ${target_os} in 3876 # The Solaris 2 runtime linker doesn't support the GNU extension of 3877 # binding the same symbol to different versions 3878 solaris2*) 3879 ;; 3880 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do. 3881 *) 3882 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1, 3883 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.]) 3884 ;; 3885 esac 3886fi 3887 3888# Now, set up compatibility support, if any. 3889# In addition, need this to deal with std::size_t mangling in 3890# src/compatibility.cc. In a perfect world, could use 3891# typeid(std::size_t).name()[0] to do direct substitution. 3892AC_MSG_CHECKING([for size_t as unsigned int]) 3893ac_save_CFLAGS="$CFLAGS" 3894CFLAGS="-Werror" 3895AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;], 3896 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no]) 3897CFLAGS=$ac_save_CFLAGS 3898if test "$glibcxx_size_t_is_i" = yes; then 3899 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.]) 3900fi 3901AC_MSG_RESULT([$glibcxx_size_t_is_i]) 3902 3903AC_MSG_CHECKING([for ptrdiff_t as int]) 3904ac_save_CFLAGS="$CFLAGS" 3905CFLAGS="-Werror" 3906AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;], 3907 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no]) 3908CFLAGS=$ac_save_CFLAGS 3909if test "$glibcxx_ptrdiff_t_is_i" = yes; then 3910 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.]) 3911fi 3912AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i]) 3913]) 3914 3915 3916dnl 3917dnl Setup to use the gcc gthr.h thread-specific memory and mutex model. 3918dnl We must stage the required headers so that they will be installed 3919dnl with the library (unlike libgcc, the STL implementation is provided 3920dnl solely within headers). Since we must not inject random user-space 3921dnl macro names into user-provided C++ code, we first stage into <file>-in 3922dnl and process to <file> with an output command. The reason for a two- 3923dnl stage process here is to correctly handle $srcdir!=$objdir without 3924dnl having to write complex code (the sed commands to clean the macro 3925dnl namespace are complex and fragile enough as it is). We must also 3926dnl add a relative path so that -I- is supported properly. 3927dnl 3928dnl Substs: 3929dnl thread_header 3930dnl 3931AC_DEFUN([GLIBCXX_ENABLE_THREADS], [ 3932 AC_MSG_CHECKING([for thread model used by GCC]) 3933 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` 3934 AC_MSG_RESULT([$target_thread_file]) 3935 GCC_AC_THREAD_HEADER([$target_thread_file]) 3936]) 3937 3938 3939dnl 3940dnl Check if gthread implementation defines the types and functions 3941dnl required by the c++0x thread library. Conforming gthread 3942dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x. 3943dnl 3944dnl GLIBCXX_ENABLE_SYMVERS must be done before this. 3945dnl 3946AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [ 3947 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support]) 3948 3949 if test x$enable_libstdcxx_threads = xauto || 3950 test x$enable_libstdcxx_threads = xyes; then 3951 3952 AC_LANG_SAVE 3953 AC_LANG_CPLUSPLUS 3954 3955 ac_save_CXXFLAGS="$CXXFLAGS" 3956 CXXFLAGS="$CXXFLAGS -fno-exceptions \ 3957 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc" 3958 3959 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` 3960 case $target_thread_file in 3961 posix) 3962 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS" 3963 esac 3964 3965 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available]) 3966 3967 AC_TRY_COMPILE([#include <unistd.h>], 3968 [ 3969 // In case of POSIX threads check _POSIX_TIMEOUTS. 3970 #if (defined(_PTHREADS) \ 3971 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0)) 3972 #error 3973 #endif 3974 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0]) 3975 3976 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock, 3977 [Define to 1 if mutex_timedlock is available.]) 3978 3979 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ; 3980 else res_mutex_timedlock=no ; fi 3981 AC_MSG_RESULT([$res_mutex_timedlock]) 3982 3983 AC_MSG_CHECKING([for gthreads library]) 3984 3985 AC_TRY_COMPILE([#include "gthr.h"], 3986 [ 3987 #ifndef __GTHREADS_CXX0X 3988 #error 3989 #endif 3990 ], [ac_has_gthreads=yes], [ac_has_gthreads=no]) 3991 else 3992 ac_has_gthreads=no 3993 fi 3994 3995 AC_MSG_RESULT([$ac_has_gthreads]) 3996 3997 if test x"$ac_has_gthreads" = x"yes"; then 3998 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1, 3999 [Define if gthreads library is available.]) 4000 4001 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14 4002 # but only do so if we're using pthread in the gthread library. 4003 # On VxWorks for example, pthread_rwlock_t is defined in sys/types.h 4004 # but the pthread library is not there by default and the gthread library 4005 # does not use it. 4006 AC_TRY_COMPILE([#include "gthr.h"], 4007 [ 4008 #if (!defined(_PTHREADS)) 4009 #error 4010 #endif 4011 ], [ac_gthread_use_pthreads=yes], [ac_gthread_use_pthreads=no]) 4012 if test x"$ac_gthread_use_pthreads" = x"yes"; then 4013 AC_CHECK_TYPE([pthread_rwlock_t], 4014 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1, 4015 [Define if POSIX read/write locks are available in <gthr.h>.])], 4016 [], 4017 [#include "gthr.h"]) 4018 fi 4019 fi 4020 4021 CXXFLAGS="$ac_save_CXXFLAGS" 4022 AC_LANG_RESTORE 4023]) 4024 4025 4026# Check whether LC_MESSAGES is available in <locale.h>. 4027# Ulrich Drepper <drepper@cygnus.com>, 1995. 4028# 4029# This file file be copied and used freely without restrictions. It can 4030# be used in projects which are not available under the GNU Public License 4031# but which still want to provide support for the GNU gettext functionality. 4032# Please note that the actual code is *not* freely available. 4033AC_DEFUN([AC_LC_MESSAGES], [ 4034 AC_CHECK_HEADER(locale.h, [ 4035 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES, 4036 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES], 4037 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)]) 4038 if test $ac_cv_val_LC_MESSAGES = yes; then 4039 AC_DEFINE(HAVE_LC_MESSAGES, 1, 4040 [Define if LC_MESSAGES is available in <locale.h>.]) 4041 fi 4042 ]) 4043]) 4044 4045dnl 4046dnl Check whether rdrand is supported in the assembler. 4047AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [ 4048 AC_MSG_CHECKING([for rdrand support in assembler]) 4049 AC_CACHE_VAL(ac_cv_x86_rdrand, [ 4050 ac_cv_x86_rdrand=no 4051 case "$target" in 4052 i?86-*-* | \ 4053 x86_64-*-*) 4054 AC_TRY_COMPILE(, [asm("rdrand %eax");], 4055 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no]) 4056 esac 4057 ]) 4058 if test $ac_cv_x86_rdrand = yes; then 4059 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1, 4060 [ Defined if as can handle rdrand. ]) 4061 fi 4062 AC_MSG_RESULT($ac_cv_x86_rdrand) 4063]) 4064 4065dnl 4066dnl Check whether rdseed is supported in the assembler. 4067AC_DEFUN([GLIBCXX_CHECK_X86_RDSEED], [ 4068 AC_MSG_CHECKING([for rdseed support in assembler]) 4069 AC_CACHE_VAL(ac_cv_x86_rdseed, [ 4070 ac_cv_x86_rdseed=no 4071 case "$target" in 4072 i?86-*-* | \ 4073 x86_64-*-*) 4074 AC_TRY_COMPILE(, [asm("rdseed %eax");], 4075 [ac_cv_x86_rdseed=yes], [ac_cv_x86_rdseed=no]) 4076 esac 4077 ]) 4078 if test $ac_cv_x86_rdseed = yes; then 4079 AC_DEFINE(_GLIBCXX_X86_RDSEED, 1, 4080 [ Defined if as can handle rdseed. ]) 4081 fi 4082 AC_MSG_RESULT($ac_cv_x86_rdseed) 4083]) 4084 4085dnl 4086dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS. 4087dnl 4088AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [ 4089 4090 AC_LANG_SAVE 4091 AC_LANG_CPLUSPLUS 4092 ac_save_CXXFLAGS="$CXXFLAGS" 4093 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4094 4095 AC_MSG_CHECKING([for get_nprocs]) 4096 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [ 4097 GCC_TRY_COMPILE_OR_LINK( 4098 [#include <sys/sysinfo.h>], 4099 [int n = get_nprocs();], 4100 [glibcxx_cv_GET_NPROCS=yes], 4101 [glibcxx_cv_GET_NPROCS=no]) 4102 ]) 4103 if test $glibcxx_cv_GET_NPROCS = yes; then 4104 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.]) 4105 fi 4106 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS) 4107 4108 CXXFLAGS="$ac_save_CXXFLAGS" 4109 AC_LANG_RESTORE 4110]) 4111 4112dnl 4113dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN. 4114dnl 4115AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [ 4116 4117 AC_LANG_SAVE 4118 AC_LANG_CPLUSPLUS 4119 ac_save_CXXFLAGS="$CXXFLAGS" 4120 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4121 4122 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN]) 4123 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [ 4124 GCC_TRY_COMPILE_OR_LINK( 4125 [#include <unistd.h>], 4126 [int n = sysconf(_SC_NPROCESSORS_ONLN);], 4127 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes], 4128 [glibcxx_cv_SC_NPROCESSORS_ONLN=no]) 4129 ]) 4130 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then 4131 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.]) 4132 fi 4133 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN) 4134 4135 CXXFLAGS="$ac_save_CXXFLAGS" 4136 AC_LANG_RESTORE 4137]) 4138 4139dnl 4140dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN. 4141dnl 4142AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [ 4143 4144 AC_LANG_SAVE 4145 AC_LANG_CPLUSPLUS 4146 ac_save_CXXFLAGS="$CXXFLAGS" 4147 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4148 4149 AC_MSG_CHECKING([for _SC_NPROC_ONLN]) 4150 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [ 4151 GCC_TRY_COMPILE_OR_LINK( 4152 [#include <unistd.h>], 4153 [int n = sysconf(_SC_NPROC_ONLN);], 4154 [glibcxx_cv_SC_NPROC_ONLN=yes], 4155 [glibcxx_cv_SC_NPROC_ONLN=no]) 4156 ]) 4157 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then 4158 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.]) 4159 fi 4160 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN) 4161 4162 CXXFLAGS="$ac_save_CXXFLAGS" 4163 AC_LANG_RESTORE 4164]) 4165 4166dnl 4167dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP. 4168dnl 4169AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [ 4170 4171 AC_LANG_SAVE 4172 AC_LANG_CPLUSPLUS 4173 ac_save_CXXFLAGS="$CXXFLAGS" 4174 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4175 4176 AC_MSG_CHECKING([for pthreads_num_processors_np]) 4177 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [ 4178 GCC_TRY_COMPILE_OR_LINK( 4179 [#include <pthread.h>], 4180 [int n = pthread_num_processors_np();], 4181 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes], 4182 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no]) 4183 ]) 4184 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then 4185 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.]) 4186 fi 4187 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP) 4188 4189 CXXFLAGS="$ac_save_CXXFLAGS" 4190 AC_LANG_RESTORE 4191]) 4192 4193dnl 4194dnl Check whether pthread_cond_clockwait is available in <pthread.h> for std::condition_variable to use, 4195dnl and define _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT. 4196dnl 4197AC_DEFUN([GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT], [ 4198 4199 AC_LANG_SAVE 4200 AC_LANG_CPLUSPLUS 4201 ac_save_CXXFLAGS="$CXXFLAGS" 4202 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4203 ac_save_LIBS="$LIBS" 4204 LIBS="$LIBS -lpthread" 4205 4206 AC_MSG_CHECKING([for pthread_cond_clockwait]) 4207 AC_CACHE_VAL(glibcxx_cv_PTHREAD_COND_CLOCKWAIT, [ 4208 GCC_TRY_COMPILE_OR_LINK( 4209 [#include <pthread.h>], 4210 [pthread_mutex_t mutex; pthread_cond_t cond; struct timespec ts; int n = pthread_cond_clockwait(&cond, &mutex, 0, &ts);], 4211 [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=yes], 4212 [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=no]) 4213 ]) 4214 if test $glibcxx_cv_PTHREAD_COND_CLOCKWAIT = yes; then 4215 AC_DEFINE(_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT, 1, [Define if pthread_cond_clockwait is available in <pthread.h>.]) 4216 fi 4217 AC_MSG_RESULT($glibcxx_cv_PTHREAD_COND_CLOCKWAIT) 4218 4219 CXXFLAGS="$ac_save_CXXFLAGS" 4220 LIBS="$ac_save_LIBS" 4221 AC_LANG_RESTORE 4222]) 4223 4224dnl 4225dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use, 4226dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK. 4227dnl 4228AC_DEFUN([GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK], [ 4229 4230 AC_LANG_SAVE 4231 AC_LANG_CPLUSPLUS 4232 ac_save_CXXFLAGS="$CXXFLAGS" 4233 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4234 ac_save_LIBS="$LIBS" 4235 LIBS="$LIBS -lpthread" 4236 4237 AC_MSG_CHECKING([for pthread_mutex_clocklock]) 4238 AC_CACHE_VAL(glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK, [ 4239 GCC_TRY_COMPILE_OR_LINK( 4240 [#include <pthread.h>], 4241 [pthread_mutex_t mutex; struct timespec ts; int n = pthread_mutex_clocklock(&mutex, CLOCK_REALTIME, &ts);], 4242 [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=yes], 4243 [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=no]) 4244 ]) 4245 if test $glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK = yes; then 4246 AC_DEFINE(_GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK, 1, [Define if pthread_mutex_clocklock is available in <pthread.h>.]) 4247 fi 4248 AC_MSG_RESULT($glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK) 4249 4250 CXXFLAGS="$ac_save_CXXFLAGS" 4251 LIBS="$ac_save_LIBS" 4252 AC_LANG_RESTORE 4253]) 4254 4255dnl 4256dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use, 4257dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK. 4258dnl 4259AC_DEFUN([GLIBCXX_CHECK_PTHREAD_RWLOCK_CLOCKLOCK], [ 4260 4261 AC_LANG_SAVE 4262 AC_LANG_CPLUSPLUS 4263 ac_save_CXXFLAGS="$CXXFLAGS" 4264 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4265 ac_save_LIBS="$LIBS" 4266 LIBS="$LIBS -lpthread" 4267 4268 AC_MSG_CHECKING([for pthread_rwlock_clockrdlock, pthread_wlock_clockwrlock]) 4269 AC_CACHE_VAL(glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK, [ 4270 GCC_TRY_COMPILE_OR_LINK( 4271 [#include <pthread.h>], 4272 [pthread_rwlock_t rwl; struct timespec ts;] 4273 [int n = pthread_rwlock_clockrdlock(&rwl, CLOCK_REALTIME, &ts);] 4274 [int m = pthread_rwlock_clockwrlock(&rwl, CLOCK_REALTIME, &ts);], 4275 [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=yes], 4276 [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=no]) 4277 ]) 4278 if test $glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK = yes; then 4279 AC_DEFINE(_GLIBCXX_USE_PTHREAD_RWLOCK_CLOCKLOCK, 1, [Define if pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock are available in <pthread.h>.]) 4280 fi 4281 AC_MSG_RESULT($glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK) 4282 4283 CXXFLAGS="$ac_save_CXXFLAGS" 4284 LIBS="$ac_save_LIBS" 4285 AC_LANG_RESTORE 4286]) 4287 4288dnl 4289dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU. 4290dnl 4291AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [ 4292 4293 AC_LANG_SAVE 4294 AC_LANG_CPLUSPLUS 4295 ac_save_CXXFLAGS="$CXXFLAGS" 4296 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4297 4298 AC_MSG_CHECKING([for hw.ncpu sysctl]) 4299 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [ 4300 GCC_TRY_COMPILE_OR_LINK( 4301 [ 4302 #include <stddef.h> 4303 #include <sys/sysctl.h> 4304 ], 4305 [ 4306 int count; 4307 size_t size = sizeof(count); 4308 int mib[] = { CTL_HW, HW_NCPU }; 4309 sysctl(mib, 2, &count, &size, NULL, 0); 4310 ], 4311 [glibcxx_cv_SYSCTL_HW_NCPU=yes], 4312 [glibcxx_cv_SYSCTL_HW_NCPU=no]) 4313 ]) 4314 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then 4315 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.]) 4316 fi 4317 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU) 4318 4319 CXXFLAGS="$ac_save_CXXFLAGS" 4320 AC_LANG_RESTORE 4321]) 4322 4323dnl 4324dnl Check to see if python pretty printing can be activated. 4325dnl 4326dnl --with-python-dir=dir 4327dnl installs directory into $prefix/dir 4328AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [ 4329 4330AC_MSG_CHECKING([for custom python install directory]) 4331AC_ARG_WITH([python-dir], 4332 AS_HELP_STRING([--with-python-dir], 4333 [the location to install Python modules. This path is relative starting from the prefix.]), 4334 [with_python_dir=$withval], [with_python_dir="no"]) 4335AC_MSG_RESULT(${with_python_dir}) 4336 4337# Needed for installing Python modules during make install. 4338python_mod_dir="${with_python_dir}" 4339AC_SUBST(python_mod_dir) 4340GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no) 4341]) 4342 4343dnl 4344dnl Check to see if -Werror is disabled. 4345dnl 4346dnl --enable-werror/--disable-werror 4347AC_DEFUN([GLIBCXX_ENABLE_WERROR], [ 4348 AC_MSG_CHECKING([for -Werror]) 4349 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror]) 4350 AC_MSG_RESULT($enable_werror) 4351 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes) 4352]) 4353 4354dnl 4355dnl Check whether obsolescent tmpnam is available in <stdio.h>, 4356dnl and define _GLIBCXX_USE_TMPNAM. 4357dnl 4358AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl 4359dnl 4360 AC_LANG_SAVE 4361 AC_LANG_CPLUSPLUS 4362 ac_save_CXXFLAGS="$CXXFLAGS" 4363 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4364dnl 4365 AC_MSG_CHECKING([for tmpnam]) 4366 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl 4367 GCC_TRY_COMPILE_OR_LINK( 4368 [#include <stdio.h>], 4369 [char *tmp = tmpnam(NULL);], 4370 [glibcxx_cv_TMPNAM=yes], 4371 [glibcxx_cv_TMPNAM=no]) 4372 ]) 4373 if test $glibcxx_cv_TMPNAM = yes; then 4374 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.]) 4375 fi 4376 AC_MSG_RESULT($glibcxx_cv_TMPNAM) 4377dnl 4378 CXXFLAGS="$ac_save_CXXFLAGS" 4379 AC_LANG_RESTORE 4380]) 4381 4382dnl 4383dnl Check to see if sys/sdt.h exists and that it is suitable for use. 4384dnl Some versions of sdt.h were not compatible with C++11. 4385dnl 4386AC_DEFUN([GLIBCXX_CHECK_SDT_H], [ 4387 AC_MSG_CHECKING([for suitable sys/sdt.h]) 4388 # Note that this test has to be run with the C language. 4389 # Otherwise, sdt.h will try to include some headers from 4390 # libstdc++ itself. 4391 AC_LANG_SAVE 4392 AC_LANG_C 4393 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [ 4394 # Because we have to run the test in C, we use grep rather 4395 # than the compiler to check for the bug. The bug is that 4396 # were strings without trailing whitespace, causing g++ 4397 # to look for operator"". The pattern searches for the fixed 4398 # output. 4399 AC_EGREP_CPP([ \",\" ], [ 4400 #include <sys/sdt.h> 4401 int f() { STAP_PROBE(hi, bob); } 4402 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no]) 4403 ]) 4404 AC_LANG_RESTORE 4405 if test $glibcxx_cv_sys_sdt_h = yes; then 4406 AC_DEFINE(HAVE_SYS_SDT_H, 1, 4407 [Define to 1 if you have a suitable <sys/sdt.h> header file]) 4408 fi 4409 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h) 4410]) 4411 4412dnl 4413dnl Control whether the library should define symbols for old and new ABIs. 4414dnl This affects definitions of strings, stringstreams and locale facets. 4415dnl 4416dnl --disable-libstdcxx-dual-abi will use old ABI for all types. 4417dnl 4418dnl Defines: 4419dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0) 4420dnl 4421AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [ 4422 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string]) 4423 if test x$enable_symvers = xgnu-versioned-namespace; then 4424 # gnu-versioned-namespace is incompatible with the dual ABI. 4425 enable_libstdcxx_dual_abi="no" 4426 fi 4427 if test x"$enable_libstdcxx_dual_abi" != xyes; then 4428 AC_MSG_NOTICE([dual ABI is disabled]) 4429 default_libstdcxx_abi="gcc4-compatible" 4430 fi 4431 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes) 4432]) 4433 4434dnl 4435dnl Check to see which ABI should be enabled by default. 4436dnl 4437dnl --with-default-libstdcxx-abi={gcc4-compatible,new} 4438dnl 4439dnl Defines: 4440dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0) 4441dnl 4442AC_DEFUN([GLIBCXX_DEFAULT_ABI], [ 4443 if test x$enable_libstdcxx_dual_abi = xyes; then 4444 AC_MSG_CHECKING([for default std::string ABI to use]) 4445 AC_ARG_WITH([default-libstdcxx-abi], 4446 AS_HELP_STRING([--with-default-libstdcxx-abi], 4447 [set the std::string ABI to use by default]), 4448 [case "$withval" in 4449 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;; 4450 new|cxx11) default_libstdcxx_abi="new" ;; 4451 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;; 4452 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;; 4453 esac 4454 ], 4455 [default_libstdcxx_abi="new"]) 4456 AC_MSG_RESULT(${default_libstdcxx_abi}) 4457 fi 4458 if test $default_libstdcxx_abi = "new"; then 4459 glibcxx_cxx11_abi=1 4460 glibcxx_cxx98_abi=0 4461 else 4462 glibcxx_cxx11_abi=0 4463 glibcxx_cxx98_abi=1 4464 fi 4465 AC_SUBST(glibcxx_cxx98_abi) 4466 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1) 4467]) 4468 4469dnl 4470dnl Check to see whether to build libstdc++fs.a 4471dnl 4472dnl --enable-libstdcxx-filesystem-ts 4473dnl 4474AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [ 4475 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,, 4476 [turns on ISO/IEC TS 18822 support], 4477 [permit yes|no|auto]) 4478 4479 AC_MSG_CHECKING([whether to build Filesystem TS support]) 4480 if test x"$ac_cv_header_dirent_h" != x"yes"; then 4481 enable_libstdcxx_filesystem_ts=no 4482 fi 4483 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then 4484 case "${target_os}" in 4485 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*) 4486 enable_libstdcxx_filesystem_ts=yes 4487 ;; 4488 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu | uclinux*) 4489 enable_libstdcxx_filesystem_ts=yes 4490 ;; 4491 rtems*) 4492 enable_libstdcxx_filesystem_ts=yes 4493 ;; 4494 solaris*) 4495 enable_libstdcxx_filesystem_ts=yes 4496 ;; 4497 mingw*) 4498 enable_libstdcxx_filesystem_ts=yes 4499 ;; 4500 *) 4501 enable_libstdcxx_filesystem_ts=no 4502 ;; 4503 esac 4504 fi 4505 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts) 4506 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes) 4507]) 4508 4509dnl 4510dnl Check whether the library calls required by the C++17 Filesystem library 4511dnl and the Filesystem TS are present. 4512dnl Defines: 4513dnl HAVE_STRUCT_DIRENT_D_TYPE 4514dnl _GLIBCXX_USE_REALPATH 4515dnl _GLIBCXX_USE_UTIMENSAT 4516dnl _GLIBCXX_USE_ST_MTIM 4517dnl _GLIBCXX_USE_FCHMOD 4518dnl _GLIBCXX_USE_FCHMODAT 4519dnl _GLIBCXX_USE_SENDFILE 4520dnl HAVE_LINK 4521dnl HAVE_READLINK 4522dnl HAVE_SYMLINK 4523dnl 4524AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl 4525dnl 4526 AC_LANG_SAVE 4527 AC_LANG_CPLUSPLUS 4528 ac_save_CXXFLAGS="$CXXFLAGS" 4529 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4530dnl 4531 AC_MSG_CHECKING([for struct dirent.d_type]) 4532 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl 4533 GCC_TRY_COMPILE_OR_LINK( 4534 [#include <dirent.h>], 4535 [ 4536 struct dirent d; 4537 if (sizeof d.d_type) return 0; 4538 ], 4539 [glibcxx_cv_dirent_d_type=yes], 4540 [glibcxx_cv_dirent_d_type=no]) 4541 ]) 4542 if test $glibcxx_cv_dirent_d_type = yes; then 4543 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.]) 4544 fi 4545 AC_MSG_RESULT($glibcxx_cv_dirent_d_type) 4546dnl 4547 AC_MSG_CHECKING([for realpath]) 4548 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl 4549 GCC_TRY_COMPILE_OR_LINK( 4550 [ 4551 #include <limits.h> 4552 #include <stdlib.h> 4553 #include <unistd.h> 4554 ], 4555 [ 4556 #if _XOPEN_VERSION < 500 4557 #error 4558 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX) 4559 char *tmp = realpath((const char*)NULL, (char*)NULL); 4560 #else 4561 #error 4562 #endif 4563 ], 4564 [glibcxx_cv_realpath=yes], 4565 [glibcxx_cv_realpath=no]) 4566 ]) 4567 if test $glibcxx_cv_realpath = yes; then 4568 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.]) 4569 fi 4570 AC_MSG_RESULT($glibcxx_cv_realpath) 4571dnl 4572 AC_MSG_CHECKING([for utimensat]) 4573 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl 4574 GCC_TRY_COMPILE_OR_LINK( 4575 [ 4576 #include <fcntl.h> 4577 #include <sys/stat.h> 4578 ], 4579 [ 4580 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } }; 4581 int i = utimensat(AT_FDCWD, "path", ts, 0); 4582 ], 4583 [glibcxx_cv_utimensat=yes], 4584 [glibcxx_cv_utimensat=no]) 4585 ]) 4586 if test $glibcxx_cv_utimensat = yes; then 4587 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.]) 4588 fi 4589 AC_MSG_RESULT($glibcxx_cv_utimensat) 4590dnl 4591 AC_MSG_CHECKING([for utime]) 4592 AC_CACHE_VAL(glibcxx_cv_utime, [dnl 4593 GCC_TRY_COMPILE_OR_LINK( 4594 [ 4595 #include <utime.h> 4596 ], 4597 [ 4598 struct utimbuf t = { 1, 1 }; 4599 int i = utime("path", &t); 4600 ], 4601 [glibcxx_cv_utime=yes], 4602 [glibcxx_cv_utime=no]) 4603 ]) 4604 if test $glibcxx_cv_utime = yes; then 4605 AC_DEFINE(_GLIBCXX_USE_UTIME, 1, [Define if utime is available in <utime.h>.]) 4606 fi 4607 AC_MSG_RESULT($glibcxx_cv_utime) 4608dnl 4609 AC_MSG_CHECKING([for lstat]) 4610 AC_CACHE_VAL(glibcxx_cv_lstat, [dnl 4611 GCC_TRY_COMPILE_OR_LINK( 4612 [ #include <sys/stat.h> ], 4613 [ 4614 struct stat st; 4615 int i = lstat("path", &st); 4616 ], 4617 [glibcxx_cv_lstat=yes], 4618 [glibcxx_cv_lstat=no]) 4619 ]) 4620 if test $glibcxx_cv_lstat = yes; then 4621 AC_DEFINE(_GLIBCXX_USE_LSTAT, 1, [Define if lstat is available in <sys/stat.h>.]) 4622 fi 4623 AC_MSG_RESULT($glibcxx_cv_lstat) 4624dnl 4625 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec]) 4626 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl 4627 GCC_TRY_COMPILE_OR_LINK( 4628 [ #include <sys/stat.h> ], 4629 [ 4630 struct stat st; 4631 return st.st_mtim.tv_nsec; 4632 ], 4633 [glibcxx_cv_st_mtim=yes], 4634 [glibcxx_cv_st_mtim=no]) 4635 ]) 4636 if test $glibcxx_cv_st_mtim = yes; then 4637 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.]) 4638 fi 4639 AC_MSG_RESULT($glibcxx_cv_st_mtim) 4640dnl 4641 AC_MSG_CHECKING([for fchmod]) 4642 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl 4643 GCC_TRY_COMPILE_OR_LINK( 4644 [#include <sys/stat.h>], 4645 [fchmod(1, S_IWUSR);], 4646 [glibcxx_cv_fchmod=yes], 4647 [glibcxx_cv_fchmod=no]) 4648 ]) 4649 if test $glibcxx_cv_fchmod = yes; then 4650 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.]) 4651 fi 4652 AC_MSG_RESULT($glibcxx_cv_fchmod) 4653dnl 4654 AC_MSG_CHECKING([for fchmodat]) 4655 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl 4656 GCC_TRY_COMPILE_OR_LINK( 4657 [ 4658 #include <fcntl.h> 4659 #include <sys/stat.h> 4660 ], 4661 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);], 4662 [glibcxx_cv_fchmodat=yes], 4663 [glibcxx_cv_fchmodat=no]) 4664 ]) 4665 if test $glibcxx_cv_fchmodat = yes; then 4666 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.]) 4667 fi 4668 AC_MSG_RESULT($glibcxx_cv_fchmodat) 4669dnl 4670 AC_MSG_CHECKING([for sendfile that can copy files]) 4671 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl 4672 case "${target_os}" in 4673 gnu* | linux* | solaris* | uclinux*) 4674 GCC_TRY_COMPILE_OR_LINK( 4675 [#include <sys/sendfile.h>], 4676 [sendfile(1, 2, (off_t*)0, sizeof 1);], 4677 [glibcxx_cv_sendfile=yes], 4678 [glibcxx_cv_sendfile=no]) 4679 ;; 4680 *) 4681 glibcxx_cv_sendfile=no 4682 ;; 4683 esac 4684 ]) 4685 if test $glibcxx_cv_sendfile = yes; then 4686 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.]) 4687 fi 4688 AC_MSG_RESULT($glibcxx_cv_sendfile) 4689dnl 4690 AC_MSG_CHECKING([for link]) 4691 AC_CACHE_VAL(glibcxx_cv_link, [dnl 4692 GCC_TRY_COMPILE_OR_LINK( 4693 [#include <unistd.h>], 4694 [link("", "");], 4695 [glibcxx_cv_link=yes], 4696 [glibcxx_cv_link=no]) 4697 ]) 4698 if test $glibcxx_cv_link = yes; then 4699 AC_DEFINE(HAVE_LINK, 1, [Define if link is available in <unistd.h>.]) 4700 fi 4701 AC_MSG_RESULT($glibcxx_cv_link) 4702dnl 4703 AC_MSG_CHECKING([for readlink]) 4704 AC_CACHE_VAL(glibcxx_cv_readlink, [dnl 4705 GCC_TRY_COMPILE_OR_LINK( 4706 [#include <unistd.h>], 4707 [char buf[32]; readlink("", buf, sizeof(buf));], 4708 [glibcxx_cv_readlink=yes], 4709 [glibcxx_cv_readlink=no]) 4710 ]) 4711 if test $glibcxx_cv_readlink = yes; then 4712 AC_DEFINE(HAVE_READLINK, 1, [Define if readlink is available in <unistd.h>.]) 4713 fi 4714 AC_MSG_RESULT($glibcxx_cv_readlink) 4715dnl 4716 AC_MSG_CHECKING([for symlink]) 4717 AC_CACHE_VAL(glibcxx_cv_symlink, [dnl 4718 GCC_TRY_COMPILE_OR_LINK( 4719 [#include <unistd.h>], 4720 [symlink("", "");], 4721 [glibcxx_cv_symlink=yes], 4722 [glibcxx_cv_symlink=no]) 4723 ]) 4724 if test $glibcxx_cv_symlink = yes; then 4725 AC_DEFINE(HAVE_SYMLINK, 1, [Define if symlink is available in <unistd.h>.]) 4726 fi 4727 AC_MSG_RESULT($glibcxx_cv_symlink) 4728dnl 4729 AC_MSG_CHECKING([for truncate]) 4730 AC_CACHE_VAL(glibcxx_cv_truncate, [dnl 4731 GCC_TRY_COMPILE_OR_LINK( 4732 [#include <unistd.h>], 4733 [truncate("", 99);], 4734 [glibcxx_cv_truncate=yes], 4735 [glibcxx_cv_truncate=no]) 4736 ]) 4737 if test $glibcxx_cv_truncate = yes; then 4738 AC_DEFINE(HAVE_TRUNCATE, 1, [Define if truncate is available in <unistd.h>.]) 4739 fi 4740 AC_MSG_RESULT($glibcxx_cv_truncate) 4741dnl 4742 CXXFLAGS="$ac_save_CXXFLAGS" 4743 AC_LANG_RESTORE 4744]) 4745 4746dnl 4747dnl Check how size_t is mangled. Copied from libitm. 4748dnl 4749AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [ 4750 AC_CACHE_CHECK([how size_t is mangled], 4751 glibcxx_cv_size_t_mangling, [ 4752 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;], 4753 [glibcxx_cv_size_t_mangling=m], [ 4754 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;], 4755 [glibcxx_cv_size_t_mangling=j], [ 4756 AC_TRY_COMPILE([], 4757 [extern __SIZE_TYPE__ x; extern unsigned long long x;], 4758 [glibcxx_cv_size_t_mangling=y], [ 4759 AC_TRY_COMPILE([], 4760 [extern __SIZE_TYPE__ x; extern unsigned short x;], 4761 [glibcxx_cv_size_t_mangling=t], [ 4762 AC_TRY_COMPILE([], 4763 [extern __SIZE_TYPE__ x; extern __int20 unsigned x;], 4764 [glibcxx_cv_size_t_mangling=u6uint20], 4765 [glibcxx_cv_size_t_mangling=x]) 4766 ]) 4767 ]) 4768 ]) 4769 ]) 4770 ]) 4771 if test $glibcxx_cv_size_t_mangling = x; then 4772 AC_MSG_ERROR([Unknown underlying type for size_t]) 4773 fi 4774 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling], 4775 [Define to the letter to which size_t is mangled.]) 4776]) 4777 4778dnl 4779dnl Determine whether std::exception_ptr symbols should be exported with 4780dnl the symbol versions from GCC 4.6.0 or GCC 7.1.0, depending on which 4781dnl release first added support for std::exception_ptr. Originally it was 4782dnl only supported for targets with always-lock-free atomics for int, but 4783dnl since GCC 7.1 it is supported for all targets. 4784dnl 4785AC_DEFUN([GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER], [ 4786 if test $enable_symvers != no; then 4787 AC_MSG_CHECKING([for first version to support std::exception_ptr]) 4788 case ${target} in 4789 aarch64-*-* | alpha-*-* | hppa*-*-* | i?86-*-* | x86_64-*-* | \ 4790 m68k-*-* | powerpc*-*-* | s390*-*-* | *-*-solaris* ) 4791 ac_exception_ptr_since_gcc46=yes 4792 ;; 4793 *) 4794 # If the value of this macro changes then we will need to hardcode 4795 # yes/no here for additional targets based on the original value. 4796 AC_TRY_COMPILE([], [ 4797 #if __GCC_ATOMIC_INT_LOCK_FREE <= 1 4798 # error atomic int not always lock free 4799 #endif 4800 ], 4801 [ac_exception_ptr_since_gcc46=yes], 4802 [ac_exception_ptr_since_gcc46=no]) 4803 ;; 4804 esac 4805 if test x"$ac_exception_ptr_since_gcc46" = x"yes" ; then 4806 AC_DEFINE(HAVE_EXCEPTION_PTR_SINCE_GCC46, 1, 4807 [Define to 1 if GCC 4.6 supported std::exception_ptr for the target]) 4808 AC_MSG_RESULT([4.6.0]) 4809 else 4810 AC_MSG_RESULT([7.1.0]) 4811 fi 4812 fi 4813]) 4814 4815# Macros from the top-level gcc directory. 4816m4_include([../config/gc++filt.m4]) 4817m4_include([../config/tls.m4]) 4818m4_include([../config/gthr.m4]) 4819m4_include([../config/cet.m4]) 4820