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/GNU gold /GNU ld /;s/GNU ld version /GNU ld /;s/GNU ld ([^)]*) /GNU ld /;s/GNU ld \([0-9.][0-9.]*\).*/\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 setrlimit_have_headers=yes 320 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h, 321 [], 322 [setrlimit_have_headers=no]) 323 # If don't have the headers, then we can't run the tests now, and we 324 # won't be seeing any of these during testsuite compilation. 325 if test $setrlimit_have_headers = yes; then 326 # Can't do these in a loop, else the resulting syntax is wrong. 327 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA) 328 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS) 329 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM) 330 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS) 331 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE) 332 333 # Check for rlimit, setrlimit. 334 AC_CACHE_VAL(glibcxx_cv_setrlimit, [ 335 AC_TRY_COMPILE( 336 [#include <unistd.h> 337 #include <sys/time.h> 338 #include <sys/resource.h> 339 ], 340 [struct rlimit r; 341 setrlimit(0, &r);], 342 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no]) 343 ]) 344 fi 345 346 AC_MSG_CHECKING([for testsuite resource limits support]) 347 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then 348 ac_res_limits=yes 349 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1, 350 [Define if using setrlimit to set resource limits during 351 "make check"]) 352 else 353 ac_res_limits=no 354 fi 355 AC_MSG_RESULT($ac_res_limits) 356]) 357 358 359dnl 360dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>. 361dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately. 362dnl 363AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [ 364 365 AC_LANG_SAVE 366 AC_LANG_CPLUSPLUS 367 ac_save_CXXFLAGS="$CXXFLAGS" 368 CXXFLAGS="$CXXFLAGS -fno-exceptions" 369 370 AC_MSG_CHECKING([for S_ISREG or S_IFREG]) 371 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [ 372 GCC_TRY_COMPILE_OR_LINK( 373 [#include <sys/stat.h>], 374 [struct stat buffer; 375 fstat(0, &buffer); 376 S_ISREG(buffer.st_mode);], 377 [glibcxx_cv_S_ISREG=yes], 378 [glibcxx_cv_S_ISREG=no]) 379 ]) 380 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [ 381 GCC_TRY_COMPILE_OR_LINK( 382 [#include <sys/stat.h>], 383 [struct stat buffer; 384 fstat(0, &buffer); 385 S_IFREG & buffer.st_mode;], 386 [glibcxx_cv_S_IFREG=yes], 387 [glibcxx_cv_S_IFREG=no]) 388 ]) 389 res=no 390 if test $glibcxx_cv_S_ISREG = yes; then 391 AC_DEFINE(HAVE_S_ISREG, 1, 392 [Define if S_ISREG is available in <sys/stat.h>.]) 393 res=S_ISREG 394 elif test $glibcxx_cv_S_IFREG = yes; then 395 AC_DEFINE(HAVE_S_IFREG, 1, 396 [Define if S_IFREG is available in <sys/stat.h>.]) 397 res=S_IFREG 398 fi 399 AC_MSG_RESULT($res) 400 401 CXXFLAGS="$ac_save_CXXFLAGS" 402 AC_LANG_RESTORE 403]) 404 405 406dnl 407dnl Check whether poll is available in <poll.h>, and define HAVE_POLL. 408dnl 409AC_DEFUN([GLIBCXX_CHECK_POLL], [ 410 411 AC_LANG_SAVE 412 AC_LANG_CPLUSPLUS 413 ac_save_CXXFLAGS="$CXXFLAGS" 414 CXXFLAGS="$CXXFLAGS -fno-exceptions" 415 416 AC_MSG_CHECKING([for poll]) 417 AC_CACHE_VAL(glibcxx_cv_POLL, [ 418 GCC_TRY_COMPILE_OR_LINK( 419 [#include <poll.h>], 420 [struct pollfd pfd[1]; 421 pfd[0].events = POLLIN; 422 poll(pfd, 1, 0);], 423 [glibcxx_cv_POLL=yes], 424 [glibcxx_cv_POLL=no]) 425 ]) 426 if test $glibcxx_cv_POLL = yes; then 427 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.]) 428 fi 429 AC_MSG_RESULT($glibcxx_cv_POLL) 430 431 CXXFLAGS="$ac_save_CXXFLAGS" 432 AC_LANG_RESTORE 433]) 434 435 436dnl 437dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV. 438dnl 439AC_DEFUN([GLIBCXX_CHECK_WRITEV], [ 440 441 AC_LANG_SAVE 442 AC_LANG_CPLUSPLUS 443 ac_save_CXXFLAGS="$CXXFLAGS" 444 CXXFLAGS="$CXXFLAGS -fno-exceptions" 445 446 AC_MSG_CHECKING([for writev]) 447 AC_CACHE_VAL(glibcxx_cv_WRITEV, [ 448 GCC_TRY_COMPILE_OR_LINK( 449 [#include <sys/uio.h>], 450 [struct iovec iov[2]; 451 writev(0, iov, 0);], 452 [glibcxx_cv_WRITEV=yes], 453 [glibcxx_cv_WRITEV=no]) 454 ]) 455 if test $glibcxx_cv_WRITEV = yes; then 456 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.]) 457 fi 458 AC_MSG_RESULT($glibcxx_cv_WRITEV) 459 460 CXXFLAGS="$ac_save_CXXFLAGS" 461 AC_LANG_RESTORE 462]) 463 464 465dnl 466dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T. 467dnl Also check whether int64_t is actually a typedef to long or long long. 468dnl 469AC_DEFUN([GLIBCXX_CHECK_INT64_T], [ 470 471 AC_LANG_SAVE 472 AC_LANG_CPLUSPLUS 473 474 AC_MSG_CHECKING([for int64_t]) 475 AC_CACHE_VAL(glibcxx_cv_INT64_T, [ 476 AC_TRY_COMPILE( 477 [#include <stdint.h>], 478 [int64_t var;], 479 [glibcxx_cv_INT64_T=yes], 480 [glibcxx_cv_INT64_T=no]) 481 ]) 482 483 if test $glibcxx_cv_INT64_T = yes; then 484 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.]) 485 AC_MSG_RESULT($glibcxx_cv_INT64_T) 486 487 AC_MSG_CHECKING([for int64_t as long]) 488 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [ 489 AC_TRY_COMPILE( 490 [#include <stdint.h> 491 template<typename, typename> struct same { enum { value = -1 }; }; 492 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; }; 493 int array[same<int64_t, long>::value];], [], 494 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no]) 495 ]) 496 497 if test $glibcxx_cv_int64_t_long = yes; then 498 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.]) 499 AC_MSG_RESULT($glibcxx_cv_int64_t_long) 500 fi 501 502 AC_MSG_CHECKING([for int64_t as long long]) 503 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [ 504 AC_TRY_COMPILE( 505 [#include <stdint.h> 506 template<typename, typename> struct same { enum { value = -1 }; }; 507 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; }; 508 int array[same<int64_t, long long>::value];], [], 509 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no]) 510 ]) 511 512 if test $glibcxx_cv_int64_t_long_long = yes; then 513 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.]) 514 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long) 515 fi 516 fi 517 518 AC_LANG_RESTORE 519]) 520 521 522dnl 523dnl Check whether LFS support is available. 524dnl 525AC_DEFUN([GLIBCXX_CHECK_LFS], [ 526 AC_LANG_SAVE 527 AC_LANG_CPLUSPLUS 528 ac_save_CXXFLAGS="$CXXFLAGS" 529 CXXFLAGS="$CXXFLAGS -fno-exceptions" 530 AC_MSG_CHECKING([for LFS support]) 531 AC_CACHE_VAL(glibcxx_cv_LFS, [ 532 GCC_TRY_COMPILE_OR_LINK( 533 [#include <unistd.h> 534 #include <stdio.h> 535 #include <sys/stat.h> 536 ], 537 [FILE* fp; 538 fopen64("t", "w"); 539 fseeko64(fp, 0, SEEK_CUR); 540 ftello64(fp); 541 lseek64(1, 0, SEEK_CUR); 542 struct stat64 buf; 543 fstat64(1, &buf);], 544 [glibcxx_cv_LFS=yes], 545 [glibcxx_cv_LFS=no]) 546 ]) 547 if test $glibcxx_cv_LFS = yes; then 548 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.]) 549 fi 550 AC_MSG_RESULT($glibcxx_cv_LFS) 551 CXXFLAGS="$ac_save_CXXFLAGS" 552 AC_LANG_RESTORE 553]) 554 555 556dnl 557dnl Check for whether a fully dynamic basic_string implementation should 558dnl be turned on, that does not put empty objects in per-process static 559dnl memory (mostly useful together with shared memory allocators, see PR 560dnl libstdc++/16612 for details). 561dnl 562dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1 563dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0 564dnl otherwise undefined 565dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)] 566dnl Where DEFAULT is either `yes' or `no'. 567dnl 568AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [ 569 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory]) 570 if test $enable_fully_dynamic_string = yes; then 571 enable_fully_dynamic_string_def=1 572 else 573 enable_fully_dynamic_string_def=0 574 fi 575 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}], 576 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults]) 577]) 578 579 580dnl 581dnl Does any necessary configuration of the testsuite directory. Generates 582dnl the testsuite_hooks.h header. 583dnl 584dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this. 585dnl 586dnl Sets: 587dnl enable_abi_check 588dnl GLIBCXX_TEST_WCHAR_T 589dnl GLIBCXX_TEST_THREAD 590dnl Substs: 591dnl baseline_dir 592dnl baseline_subdir_switch 593dnl 594AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [ 595 # Do checks for resource limit functions. 596 GLIBCXX_CHECK_SETRLIMIT 597 598 if $GLIBCXX_IS_NATIVE ; then 599 # Look for setenv, so that extended locale tests can be performed. 600 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv) 601 fi 602 603 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes && 604 test $enable_symvers != no; then 605 case "$host" in 606 *-*-cygwin*) 607 enable_abi_check=no ;; 608 *) 609 enable_abi_check=yes ;; 610 esac 611 else 612 # Only build this as native, since automake does not understand 613 # CXX_FOR_BUILD. 614 enable_abi_check=no 615 fi 616 617 # Export file names for ABI checking. 618 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}" 619 AC_SUBST(baseline_dir) 620 baseline_subdir_switch="$abi_baseline_subdir_switch" 621 AC_SUBST(baseline_subdir_switch) 622]) 623 624 625dnl 626dnl Does any necessary configuration for docbook in the docs directory. 627dnl 628dnl XSLTPROC must be set before this 629dnl 630dnl Sets: 631dnl glibcxx_stylesheets 632dnl Substs: 633dnl XSL_STYLE_DIR 634dnl 635AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [ 636 637glibcxx_docbook_url=http://docbook.sourceforge.net/release/xsl-ns/current/ 638 639AC_MSG_CHECKING([for local stylesheet directory]) 640glibcxx_local_stylesheets=no 641if test x${XMLCATALOG} = xyes && xsl_style_dir=`xmlcatalog "" $glibcxx_docbook_url 2>/dev/null` 642then 643 XSL_STYLE_DIR=`echo $xsl_style_dir | sed -n 's;^file://;;p'` 644 glibcxx_local_stylesheets=yes 645else 646 for dir in \ 647 /usr/share/sgml/docbook/xsl-ns-stylesheets \ 648 /usr/share/xml/docbook/stylesheet/docbook-xsl-ns \ 649 /usr/share/xml/docbook/stylesheet/nwalsh5/current \ 650 /usr/share/xml/docbook/stylesheet/nwalsh/current 651 do 652 if test -d $dir; then 653 glibcxx_local_stylesheets=yes 654 XSL_STYLE_DIR=$dir 655 break 656 fi 657 done 658fi 659AC_MSG_RESULT($glibcxx_local_stylesheets) 660 661if test x"$glibcxx_local_stylesheets" = x"yes"; then 662 AC_SUBST(XSL_STYLE_DIR) 663 AC_MSG_NOTICE($XSL_STYLE_DIR) 664 665 AC_MSG_CHECKING([for docbook stylesheets for documentation creation]) 666 glibcxx_stylesheets=no 667 if test x${XMLCATALOG} = xno || xmlcatalog "" $glibcxx_docbook_url/xhtml/docbook.xsl >/dev/null 2>&1; then 668 if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude $glibcxx_docbook_url/xhtml/docbook.xsl - 2>/dev/null; then 669 glibcxx_stylesheets=yes 670 fi 671 fi 672 AC_MSG_RESULT($glibcxx_stylesheets) 673 674else 675 glibcxx_stylesheets=no 676fi 677 678# Check for epub3 dependencies. 679AC_MSG_CHECKING([for epub3 stylesheets for documentation creation]) 680glibcxx_epub_stylesheets=no 681if test x"$glibcxx_local_stylesheets" = x"yes"; then 682 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then 683 glibcxx_epub_stylesheets=yes 684 fi 685fi 686AC_MSG_RESULT($glibcxx_epub_stylesheets) 687AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes") 688 689]) 690 691 692dnl 693dnl Set up *_INCLUDES variables for all sundry Makefile.am's. 694dnl 695dnl Substs: 696dnl GLIBCXX_INCLUDES 697dnl TOPLEVEL_INCLUDES 698dnl 699AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [ 700 # Used for every C++ compile we perform. 701 GLIBCXX_INCLUDES="\ 702-I$glibcxx_builddir/include/$host_alias \ 703-I$glibcxx_builddir/include \ 704-I$glibcxx_srcdir/libsupc++" 705 706 # For Canadian crosses, pick this up too. 707 if test $CANADIAN = yes; then 708 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}" 709 fi 710 711 # Stuff in the actual top level. Currently only used by libsupc++ to 712 # get unwind* headers from the libgcc dir. 713 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include' 714 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc' 715 716 # Now, export this to all the little Makefiles.... 717 AC_SUBST(GLIBCXX_INCLUDES) 718 AC_SUBST(TOPLEVEL_INCLUDES) 719]) 720 721 722dnl 723dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's. 724dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.) 725dnl 726dnl Substs: 727dnl OPTIMIZE_CXXFLAGS 728dnl WARN_FLAGS 729dnl 730AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [ 731 # Optimization flags that are probably a good idea for thrill-seekers. Just 732 # uncomment the lines below and make, everything else is ready to go... 733 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host. 734 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc 735 AC_SUBST(OPTIMIZE_CXXFLAGS) 736 737 WARN_FLAGS="-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2" 738 AC_SUBST(WARN_FLAGS) 739]) 740 741 742dnl 743dnl All installation directory information is determined here. 744dnl 745dnl Substs: 746dnl gxx_install_dir 747dnl glibcxx_prefixdir 748dnl glibcxx_toolexecdir 749dnl glibcxx_toolexeclibdir 750dnl 751dnl Assumes cross_compiling bits already done, and with_cross_host in 752dnl particular. 753dnl 754dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir. 755dnl config/gxx-include-dir.m4 must be kept consistant with this as well. 756AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [ 757 glibcxx_toolexecdir=no 758 glibcxx_toolexeclibdir=no 759 glibcxx_prefixdir=$prefix 760 761 AC_MSG_CHECKING([for gxx-include-dir]) 762 AC_ARG_WITH([gxx-include-dir], 763 AC_HELP_STRING([--with-gxx-include-dir=DIR], 764 [installation directory for include files]), 765 [case "$withval" in 766 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;; 767 no) gxx_include_dir=no ;; 768 *) gxx_include_dir=$withval ;; 769 esac], 770 [gxx_include_dir=no]) 771 AC_MSG_RESULT($gxx_include_dir) 772 773 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 774 AC_ARG_ENABLE([version-specific-runtime-libs], 775 AC_HELP_STRING([--enable-version-specific-runtime-libs], 776 [Specify that runtime libraries should be installed in a compiler-specific directory]), 777 [case "$enableval" in 778 yes) version_specific_libs=yes ;; 779 no) version_specific_libs=no ;; 780 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 781 esac], 782 [version_specific_libs=no]) 783 AC_MSG_RESULT($version_specific_libs) 784 785 # Default case for install directory for include files. 786 if test $version_specific_libs = no && test $gxx_include_dir = no; then 787 gxx_include_dir='include/c++/${gcc_version}' 788 if test -n "$with_cross_host" && 789 test x"$with_cross_host" != x"no"; then 790 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir" 791 else 792 gxx_include_dir='${prefix}/'"$gxx_include_dir" 793 fi 794 fi 795 796 # Version-specific runtime libs processing. 797 if test $version_specific_libs = yes; then 798 # Need the gcc compiler version to know where to install libraries 799 # and header files if --enable-version-specific-runtime-libs option 800 # is selected. FIXME: these variables are misnamed, there are 801 # no executables installed in _toolexecdir or _toolexeclibdir. 802 if test x"$gxx_include_dir" = x"no"; then 803 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++' 804 fi 805 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' 806 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)' 807 fi 808 809 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir 810 # Install a library built with a cross compiler in tooldir, not libdir. 811 if test x"$glibcxx_toolexecdir" = x"no"; then 812 if test -n "$with_cross_host" && 813 test x"$with_cross_host" != x"no"; then 814 glibcxx_toolexecdir='${exec_prefix}/${host_alias}' 815 glibcxx_toolexeclibdir='${toolexecdir}/lib' 816 else 817 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' 818 glibcxx_toolexeclibdir='${libdir}' 819 fi 820 multi_os_directory=`$CXX -print-multi-os-directory` 821 case $multi_os_directory in 822 .) ;; # Avoid trailing /. 823 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;; 824 esac 825 fi 826 827 AC_MSG_CHECKING([for install location]) 828 AC_MSG_RESULT($gxx_include_dir) 829 830 AC_SUBST(glibcxx_prefixdir) 831 AC_SUBST(gxx_include_dir) 832 AC_SUBST(glibcxx_toolexecdir) 833 AC_SUBST(glibcxx_toolexeclibdir) 834]) 835 836 837dnl 838dnl GLIBCXX_ENABLE 839dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING) 840dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c) 841dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER) 842dnl 843dnl See manual/appendix_porting.html#appendix.porting.build_hacking for 844dnl documentation. 845dnl 846m4_define([GLIBCXX_ENABLE],[dnl 847m4_define([_g_switch],[--enable-$1])dnl 848m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl 849 AC_ARG_ENABLE([$1],m4_dquote(_g_help), 850 m4_bmatch([$5], 851 [^permit ], 852 [[ 853 case "$enableval" in 854 m4_bpatsubst([$5],[permit ])) ;; 855 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; 856 dnl Idea for future: generate a URL pointing to 857 dnl "onlinedocs/configopts.html#whatever" 858 esac 859 ]], 860 [^$], 861 [[ 862 case "$enableval" in 863 yes|no) ;; 864 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; 865 esac 866 ]], 867 [[$5]]), 868 [enable_]m4_bpatsubst([$1],-,_)[=][$2]) 869m4_undefine([_g_switch])dnl 870m4_undefine([_g_help])dnl 871]) 872 873 874dnl 875dnl Check for ISO/IEC 9899:1999 "C99" support. 876dnl 877dnl --enable-c99 defines _GLIBCXX_USE_C99 878dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined 879dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)] 880dnl Where DEFAULT is either `yes' or `no'. 881dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'. 882dnl 883AC_DEFUN([GLIBCXX_ENABLE_C99], [ 884 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support]) 885 886 if test x"$enable_c99" = x"yes"; then 887 AC_LANG_SAVE 888 AC_LANG_CPLUSPLUS 889 890 # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__ 891 # undefined may cause fake C99 facilities, like pre-standard snprintf, 892 # to be spuriously enabled. 893 ac_save_CXXFLAGS="$CXXFLAGS" 894 CXXFLAGS="$CXXFLAGS -std=c++98" 895 ac_save_LIBS="$LIBS" 896 ac_save_gcc_no_link="$gcc_no_link" 897 898 if test x$gcc_no_link != xyes; then 899 # Use -fno-exceptions to that the C driver can link these tests without 900 # hitting undefined references to personality routines. 901 CXXFLAGS="$CXXFLAGS -fno-exceptions" 902 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [ 903 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK 904 gcc_no_link=yes 905 ]) 906 fi 907 908 # Check for the existence of <math.h> functions used if C99 is enabled. 909 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++98]) 910 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx98, [ 911 GCC_TRY_COMPILE_OR_LINK( 912 [#include <math.h> 913 volatile double d1, d2; 914 volatile int i;], 915 [i = fpclassify(d1); 916 i = isfinite(d1); 917 i = isinf(d1); 918 i = isnan(d1); 919 i = isnormal(d1); 920 i = signbit(d1); 921 i = isgreater(d1, d2); 922 i = isgreaterequal(d1, d2); 923 i = isless(d1, d2); 924 i = islessequal(d1, d2); 925 i = islessgreater(d1, d2); 926 i = islessgreater(d1, d2); 927 i = isunordered(d1, d2); 928 ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no]) 929 ]) 930 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx98) 931 if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then 932 AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1, 933 [Define if C99 functions or macros in <math.h> should be imported 934 in <cmath> in namespace std for C++98.]) 935 fi 936 937 # Check for the existence of <complex.h> complex math functions. 938 # This is necessary even though libstdc++ uses the builtin versions 939 # of these functions, because if the builtin cannot be used, a reference 940 # to the library function is emitted. 941 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no) 942 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 943 if test x"$ac_has_complex_h" = x"yes"; then 944 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++98]) 945 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx98, [ 946 GCC_TRY_COMPILE_OR_LINK( 947 [#include <complex.h> 948 typedef __complex__ float float_type; 949 typedef __complex__ double double_type; 950 typedef __complex__ long double ld_type; 951 volatile float_type tmpf; 952 volatile double_type tmpd; 953 volatile ld_type tmpld; 954 volatile float f; 955 volatile double d; 956 volatile long double ld;], 957 [f = cabsf(tmpf); 958 f = cargf(tmpf); 959 tmpf = ccosf(tmpf); 960 tmpf = ccoshf(tmpf); 961 tmpf = cexpf(tmpf); 962 tmpf = clogf(tmpf); 963 tmpf = csinf(tmpf); 964 tmpf = csinhf(tmpf); 965 tmpf = csqrtf(tmpf); 966 tmpf = ctanf(tmpf); 967 tmpf = ctanhf(tmpf); 968 tmpf = cpowf(tmpf, tmpf); 969 tmpf = cprojf(tmpf); 970 d = cabs(tmpd); 971 d = carg(tmpd); 972 tmpd = ccos(tmpd); 973 tmpd = ccosh(tmpd); 974 tmpd = cexp(tmpd); 975 tmpd = clog(tmpd); 976 tmpd = csin(tmpd); 977 tmpd = csinh(tmpd); 978 tmpd = csqrt(tmpd); 979 tmpd = ctan(tmpd); 980 tmpd = ctanh(tmpd); 981 tmpd = cpow(tmpd, tmpd); 982 tmpd = cproj(tmpd); 983 ld = cabsl(tmpld); 984 ld = cargl(tmpld); 985 tmpld = ccosl(tmpld); 986 tmpld = ccoshl(tmpld); 987 tmpld = cexpl(tmpld); 988 tmpld = clogl(tmpld); 989 tmpld = csinl(tmpld); 990 tmpld = csinhl(tmpld); 991 tmpld = csqrtl(tmpld); 992 tmpld = ctanl(tmpld); 993 tmpld = ctanhl(tmpld); 994 tmpld = cpowl(tmpld, tmpld); 995 tmpld = cprojl(tmpld); 996 ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no]) 997 ]) 998 fi 999 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx98) 1000 if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then 1001 AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1, 1002 [Define if C99 functions in <complex.h> should be used in 1003 <complex> for C++98. Using compiler builtins for these functions 1004 requires corresponding C99 library functions to be present.]) 1005 fi 1006 1007 # Check for the existence in <stdio.h> of vscanf, et. al. 1008 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++98]) 1009 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx98, [ 1010 GCC_TRY_COMPILE_OR_LINK( 1011 [#include <stdio.h> 1012 #include <stdarg.h> 1013 void foo(char* fmt, ...) 1014 { 1015 va_list args; va_start(args, fmt); 1016 vfscanf(stderr, "%i", args); 1017 vscanf("%i", args); 1018 vsnprintf(fmt, 0, "%i", args); 1019 vsscanf(fmt, "%i", args); 1020 snprintf(fmt, 0, "%i"); 1021 }], [], 1022 [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no]) 1023 ]) 1024 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx98) 1025 if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then 1026 AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1, 1027 [Define if C99 functions or macros in <stdio.h> should be imported 1028 in <cstdio> in namespace std for C++98.]) 1029 fi 1030 1031 # Check for the existence in <stdlib.h> of lldiv_t, et. al. 1032 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++98]) 1033 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx98, [ 1034 GCC_TRY_COMPILE_OR_LINK( 1035 [#include <stdlib.h> 1036 volatile float f; 1037 volatile long double ld; 1038 volatile unsigned long long ll; 1039 lldiv_t mydivt;], 1040 [char* tmp; 1041 f = strtof("gnu", &tmp); 1042 ld = strtold("gnu", &tmp); 1043 ll = strtoll("gnu", &tmp, 10); 1044 ll = strtoull("gnu", &tmp, 10); 1045 ll = llabs(10); 1046 mydivt = lldiv(10,1); 1047 ll = mydivt.quot; 1048 ll = mydivt.rem; 1049 ll = atoll("10"); 1050 _Exit(0); 1051 ], [glibcxx_cv_c99_stdlib_cxx98=yes], [glibcxx_cv_c99_stdlib_cxx98=no]) 1052 ]) 1053 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx98) 1054 if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then 1055 AC_DEFINE(_GLIBCXX98_USE_C99_STDLIB, 1, 1056 [Define if C99 functions or macros in <stdlib.h> should be imported 1057 in <cstdlib> in namespace std for C++98.]) 1058 fi 1059 1060 # Check for the existence in <wchar.h> of wcstold, etc. 1061 if test x"$ac_has_wchar_h" = xyes && 1062 test x"$ac_has_wctype_h" = xyes; then 1063 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++98]) 1064 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx98, [ 1065 AC_TRY_COMPILE([#include <wchar.h> 1066 namespace test 1067 { 1068 using ::wcstold; 1069 using ::wcstoll; 1070 using ::wcstoull; 1071 } 1072 ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no]) 1073 ]) 1074 1075 # Checks for wide character functions that may not be present. 1076 # Injection of these is wrapped with guard macros. 1077 # NB: only put functions here, instead of immediately above, if 1078 # absolutely necessary. 1079 AC_TRY_COMPILE([#include <wchar.h> 1080 namespace test { using ::vfwscanf; }], [], 1081 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], []) 1082 1083 AC_TRY_COMPILE([#include <wchar.h> 1084 namespace test { using ::vswscanf; }], [], 1085 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], []) 1086 1087 AC_TRY_COMPILE([#include <wchar.h> 1088 namespace test { using ::vwscanf; }], [], 1089 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], []) 1090 1091 AC_TRY_COMPILE([#include <wchar.h> 1092 namespace test { using ::wcstof; }], [], 1093 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], []) 1094 1095 AC_TRY_COMPILE([#include <wctype.h>], 1096 [wint_t t; int i = iswblank(t);], 1097 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], []) 1098 1099 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx98) 1100 if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then 1101 AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1, 1102 [Define if C99 functions or macros in <wchar.h> should be imported 1103 in <cwchar> in namespace std for C++98.]) 1104 fi 1105 fi 1106 1107 # Option parsed, now set things appropriately. 1108 if test x"$glibcxx_cv_c99_math_cxx98" = x"no" || 1109 test x"$glibcxx_cv_c99_complex_cxx98" = x"no" || 1110 test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" || 1111 test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" || 1112 test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then 1113 enable_c99=no; 1114 else 1115 AC_DEFINE(_GLIBCXX_USE_C99, 1, 1116 [Define if C99 functions or macros from <wchar.h>, <math.h>, 1117 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.]) 1118 fi 1119 1120 gcc_no_link="$ac_save_gcc_no_link" 1121 LIBS="$ac_save_LIBS" 1122 CXXFLAGS="$ac_save_CXXFLAGS" 1123 AC_LANG_RESTORE 1124 1125 AC_LANG_SAVE 1126 AC_LANG_CPLUSPLUS 1127 1128 # Use -std=c++11 and test again for C99 library feature in C++11 mode. 1129 # For the reasons given above we use -std=c++11 not -std=gnu++11. 1130 ac_save_CXXFLAGS="$CXXFLAGS" 1131 CXXFLAGS="$CXXFLAGS -std=c++11" 1132 ac_save_LIBS="$LIBS" 1133 ac_save_gcc_no_link="$gcc_no_link" 1134 1135 if test x$gcc_no_link != xyes; then 1136 # Use -fno-exceptions to that the C driver can link these tests without 1137 # hitting undefined references to personality routines. 1138 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1139 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [ 1140 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK 1141 gcc_no_link=yes 1142 ]) 1143 fi 1144 1145 # Check for the existence of <math.h> functions used if C99 is enabled. 1146 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++11]) 1147 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx11, [ 1148 GCC_TRY_COMPILE_OR_LINK( 1149 [#include <math.h> 1150 volatile double d1, d2; 1151 volatile int i;], 1152 [i = fpclassify(d1); 1153 i = isfinite(d1); 1154 i = isinf(d1); 1155 i = isnan(d1); 1156 i = isnormal(d1); 1157 i = signbit(d1); 1158 i = isgreater(d1, d2); 1159 i = isgreaterequal(d1, d2); 1160 i = isless(d1, d2); 1161 i = islessequal(d1, d2); 1162 i = islessgreater(d1, d2); 1163 i = islessgreater(d1, d2); 1164 i = isunordered(d1, d2); 1165 ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no]) 1166 ]) 1167 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx11) 1168 if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then 1169 AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1, 1170 [Define if C99 functions or macros in <math.h> should be imported 1171 in <cmath> in namespace std for C++11.]) 1172 fi 1173 1174 # Check for the existence of <complex.h> complex math functions. 1175 # This is necessary even though libstdc++ uses the builtin versions 1176 # of these functions, because if the builtin cannot be used, a reference 1177 # to the library function is emitted. 1178 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no) 1179 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 1180 if test x"$ac_has_complex_h" = x"yes"; then 1181 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++11]) 1182 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx11, [ 1183 GCC_TRY_COMPILE_OR_LINK( 1184 [#include <complex.h> 1185 typedef __complex__ float float_type; 1186 typedef __complex__ double double_type; 1187 typedef __complex__ long double ld_type; 1188 volatile float_type tmpf; 1189 volatile double_type tmpd; 1190 volatile ld_type tmpld; 1191 volatile float f; 1192 volatile double d; 1193 volatile long double ld;], 1194 [f = cabsf(tmpf); 1195 f = cargf(tmpf); 1196 tmpf = ccosf(tmpf); 1197 tmpf = ccoshf(tmpf); 1198 tmpf = cexpf(tmpf); 1199 tmpf = clogf(tmpf); 1200 tmpf = csinf(tmpf); 1201 tmpf = csinhf(tmpf); 1202 tmpf = csqrtf(tmpf); 1203 tmpf = ctanf(tmpf); 1204 tmpf = ctanhf(tmpf); 1205 tmpf = cpowf(tmpf, tmpf); 1206 tmpf = cprojf(tmpf); 1207 d = cabs(tmpd); 1208 d = carg(tmpd); 1209 tmpd = ccos(tmpd); 1210 tmpd = ccosh(tmpd); 1211 tmpd = cexp(tmpd); 1212 tmpd = clog(tmpd); 1213 tmpd = csin(tmpd); 1214 tmpd = csinh(tmpd); 1215 tmpd = csqrt(tmpd); 1216 tmpd = ctan(tmpd); 1217 tmpd = ctanh(tmpd); 1218 tmpd = cpow(tmpd, tmpd); 1219 tmpd = cproj(tmpd); 1220 ld = cabsl(tmpld); 1221 ld = cargl(tmpld); 1222 tmpld = ccosl(tmpld); 1223 tmpld = ccoshl(tmpld); 1224 tmpld = cexpl(tmpld); 1225 tmpld = clogl(tmpld); 1226 tmpld = csinl(tmpld); 1227 tmpld = csinhl(tmpld); 1228 tmpld = csqrtl(tmpld); 1229 tmpld = ctanl(tmpld); 1230 tmpld = ctanhl(tmpld); 1231 tmpld = cpowl(tmpld, tmpld); 1232 tmpld = cprojl(tmpld); 1233 ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no]) 1234 ]) 1235 fi 1236 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx11) 1237 if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then 1238 AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1, 1239 [Define if C99 functions in <complex.h> should be used in 1240 <complex> for C++11. Using compiler builtins for these functions 1241 requires corresponding C99 library functions to be present.]) 1242 fi 1243 1244 # Check for the existence in <stdio.h> of vscanf, et. al. 1245 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++11]) 1246 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx11, [ 1247 GCC_TRY_COMPILE_OR_LINK( 1248 [#include <stdio.h> 1249 #include <stdarg.h> 1250 void foo(char* fmt, ...) 1251 { 1252 va_list args; va_start(args, fmt); 1253 vfscanf(stderr, "%i", args); 1254 vscanf("%i", args); 1255 vsnprintf(fmt, 0, "%i", args); 1256 vsscanf(fmt, "%i", args); 1257 snprintf(fmt, 0, "%i"); 1258 }], [], 1259 [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no]) 1260 ]) 1261 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx11) 1262 if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then 1263 AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1, 1264 [Define if C99 functions or macros in <stdio.h> should be imported 1265 in <cstdio> in namespace std for C++11.]) 1266 fi 1267 1268 # Check for the existence in <stdlib.h> of lldiv_t, et. al. 1269 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++11]) 1270 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx11, [ 1271 GCC_TRY_COMPILE_OR_LINK( 1272 [#include <stdlib.h> 1273 volatile float f; 1274 volatile long double ld; 1275 volatile unsigned long long ll; 1276 lldiv_t mydivt;], 1277 [char* tmp; 1278 f = strtof("gnu", &tmp); 1279 ld = strtold("gnu", &tmp); 1280 ll = strtoll("gnu", &tmp, 10); 1281 ll = strtoull("gnu", &tmp, 10); 1282 ll = llabs(10); 1283 mydivt = lldiv(10,1); 1284 ll = mydivt.quot; 1285 ll = mydivt.rem; 1286 ll = atoll("10"); 1287 _Exit(0); 1288 ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no]) 1289 ]) 1290 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx11) 1291 if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then 1292 AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1, 1293 [Define if C99 functions or macros in <stdlib.h> should be imported 1294 in <cstdlib> in namespace std for C++11.]) 1295 fi 1296 1297 # Check for the existence in <wchar.h> of wcstold, etc. 1298 if test x"$ac_has_wchar_h" = xyes && 1299 test x"$ac_has_wctype_h" = xyes; then 1300 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++11]) 1301 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx11, [ 1302 AC_TRY_COMPILE([#include <wchar.h> 1303 namespace test 1304 { 1305 using ::wcstold; 1306 using ::wcstoll; 1307 using ::wcstoull; 1308 } 1309 ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no]) 1310 ]) 1311 1312 # Checks for wide character functions that may not be present. 1313 # Injection of these is wrapped with guard macros. 1314 # NB: only put functions here, instead of immediately above, if 1315 # absolutely necessary. 1316 AC_TRY_COMPILE([#include <wchar.h> 1317 namespace test { using ::vfwscanf; }], [], 1318 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], []) 1319 1320 AC_TRY_COMPILE([#include <wchar.h> 1321 namespace test { using ::vswscanf; }], [], 1322 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], []) 1323 1324 AC_TRY_COMPILE([#include <wchar.h> 1325 namespace test { using ::vwscanf; }], [], 1326 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], []) 1327 1328 AC_TRY_COMPILE([#include <wchar.h> 1329 namespace test { using ::wcstof; }], [], 1330 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], []) 1331 1332 AC_TRY_COMPILE([#include <wctype.h>], 1333 [wint_t t; int i = iswblank(t);], 1334 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], []) 1335 1336 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx11) 1337 if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then 1338 AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1, 1339 [Define if C99 functions or macros in <wchar.h> should be imported 1340 in <cwchar> in namespace std for C++11.]) 1341 fi 1342 fi 1343 1344 gcc_no_link="$ac_save_gcc_no_link" 1345 LIBS="$ac_save_LIBS" 1346 CXXFLAGS="$ac_save_CXXFLAGS" 1347 AC_LANG_RESTORE 1348 fi 1349 1350 AC_MSG_CHECKING([for fully enabled ISO C99 support]) 1351 AC_MSG_RESULT($enable_c99) 1352]) 1353 1354 1355dnl 1356dnl Check for clock_gettime, nanosleep and sched_yield, used in the 1357dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this] 1358dnl in the C++11 standard. 1359dnl 1360dnl --enable-libstdcxx-time 1361dnl --enable-libstdcxx-time=yes 1362dnl checks for the availability of monotonic and realtime clocks, 1363dnl nanosleep and sched_yield in libc and libposix4 and, if needed, 1364dnl links in the latter. 1365dnl --enable-libstdcxx-time=rt 1366dnl also searches (and, if needed, links) librt. Note that this is 1367dnl not always desirable because, in glibc 2.16 and earlier, for 1368dnl example, in turn it triggers the linking of libpthread too, 1369dnl which activates locking, 1370dnl a large overhead for single-thread programs. 1371dnl --enable-libstdcxx-time=no 1372dnl --disable-libstdcxx-time 1373dnl disables the checks completely 1374dnl 1375dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX 1376dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test 1377dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in 1378dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD. 1379dnl 1380AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [ 1381 1382 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]], 1383 [use KIND for check type], 1384 [permit yes|no|rt]) 1385 1386 AC_LANG_SAVE 1387 AC_LANG_CPLUSPLUS 1388 ac_save_CXXFLAGS="$CXXFLAGS" 1389 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1390 ac_save_LIBS="$LIBS" 1391 1392 ac_has_clock_monotonic=no 1393 ac_has_clock_realtime=no 1394 ac_has_nanosleep=no 1395 ac_has_sched_yield=no 1396 1397 if test x"$enable_libstdcxx_time" = x"auto"; then 1398 1399 case "${target_os}" in 1400 cygwin*) 1401 ac_has_nanosleep=yes 1402 ;; 1403 darwin*) 1404 ac_has_nanosleep=yes 1405 ac_has_sched_yield=yes 1406 ;; 1407 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) 1408 AC_MSG_CHECKING([for at least GNU libc 2.17]) 1409 AC_TRY_COMPILE( 1410 [#include <features.h>], 1411 [ 1412 #if ! __GLIBC_PREREQ(2, 17) 1413 #error 1414 #endif 1415 ], 1416 [glibcxx_glibc217=yes], [glibcxx_glibc217=no]) 1417 AC_MSG_RESULT($glibcxx_glibc217) 1418 1419 if test x"$glibcxx_glibc217" = x"yes"; then 1420 ac_has_clock_monotonic=yes 1421 ac_has_clock_realtime=yes 1422 fi 1423 ac_has_nanosleep=yes 1424 ac_has_sched_yield=yes 1425 ;; 1426 freebsd*|netbsd*|dragonfly*|rtems*) 1427 ac_has_clock_monotonic=yes 1428 ac_has_clock_realtime=yes 1429 ac_has_nanosleep=yes 1430 ac_has_sched_yield=yes 1431 ;; 1432 openbsd*) 1433 ac_has_clock_monotonic=yes 1434 ac_has_clock_realtime=yes 1435 ac_has_nanosleep=yes 1436 ;; 1437 solaris*) 1438 GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt" 1439 ac_has_clock_monotonic=yes 1440 ac_has_clock_realtime=yes 1441 ac_has_nanosleep=yes 1442 ac_has_sched_yield=yes 1443 ;; 1444 esac 1445 1446 elif test x"$enable_libstdcxx_time" != x"no"; then 1447 1448 if test x"$enable_libstdcxx_time" = x"rt"; then 1449 AC_SEARCH_LIBS(clock_gettime, [rt posix4]) 1450 AC_SEARCH_LIBS(nanosleep, [rt posix4]) 1451 else 1452 AC_SEARCH_LIBS(clock_gettime, [posix4]) 1453 AC_SEARCH_LIBS(nanosleep, [posix4]) 1454 fi 1455 1456 case "$ac_cv_search_clock_gettime" in 1457 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime 1458 ;; 1459 esac 1460 case "$ac_cv_search_nanosleep" in 1461 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep" 1462 ;; 1463 esac 1464 1465 AC_SEARCH_LIBS(sched_yield, [rt posix4]) 1466 1467 case "$ac_cv_search_sched_yield" in 1468 -lposix4*) 1469 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield" 1470 ac_has_sched_yield=yes 1471 ;; 1472 -lrt*) 1473 if test x"$enable_libstdcxx_time" = x"rt"; then 1474 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield" 1475 ac_has_sched_yield=yes 1476 fi 1477 ;; 1478 *) 1479 ac_has_sched_yield=yes 1480 ;; 1481 esac 1482 1483 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no) 1484 1485 if test x"$ac_has_unistd_h" = x"yes"; then 1486 AC_MSG_CHECKING([for monotonic clock]) 1487 AC_TRY_LINK( 1488 [#include <unistd.h> 1489 #include <time.h> 1490 ], 1491 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) 1492 timespec tp; 1493 #endif 1494 clock_gettime(CLOCK_MONOTONIC, &tp); 1495 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no]) 1496 1497 AC_MSG_RESULT($ac_has_clock_monotonic) 1498 1499 AC_MSG_CHECKING([for realtime clock]) 1500 AC_TRY_LINK( 1501 [#include <unistd.h> 1502 #include <time.h> 1503 ], 1504 [#if _POSIX_TIMERS > 0 1505 timespec tp; 1506 #endif 1507 clock_gettime(CLOCK_REALTIME, &tp); 1508 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no]) 1509 1510 AC_MSG_RESULT($ac_has_clock_realtime) 1511 1512 AC_MSG_CHECKING([for nanosleep]) 1513 AC_TRY_LINK( 1514 [#include <unistd.h> 1515 #include <time.h> 1516 ], 1517 [#if _POSIX_TIMERS > 0 1518 timespec tp; 1519 #endif 1520 nanosleep(&tp, 0); 1521 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no]) 1522 1523 AC_MSG_RESULT($ac_has_nanosleep) 1524 fi 1525 fi 1526 1527 if test x"$ac_has_clock_monotonic" != x"yes"; then 1528 case ${target_os} in 1529 linux*) 1530 AC_MSG_CHECKING([for clock_gettime syscall]) 1531 AC_TRY_COMPILE( 1532 [#include <unistd.h> 1533 #include <time.h> 1534 #include <sys/syscall.h> 1535 ], 1536 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) 1537 timespec tp; 1538 #endif 1539 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp); 1540 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp); 1541 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no]) 1542 AC_MSG_RESULT($ac_has_clock_monotonic_syscall) 1543 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then 1544 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1, 1545 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ]) 1546 ac_has_clock_monotonic=yes 1547 ac_has_clock_realtime=yes 1548 fi;; 1549 esac 1550 fi 1551 1552 if test x"$ac_has_clock_monotonic" = x"yes"; then 1553 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1, 1554 [ Defined if clock_gettime has monotonic clock support. ]) 1555 fi 1556 1557 if test x"$ac_has_clock_realtime" = x"yes"; then 1558 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1, 1559 [ Defined if clock_gettime has realtime clock support. ]) 1560 fi 1561 1562 if test x"$ac_has_sched_yield" = x"yes"; then 1563 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1, 1564 [ Defined if sched_yield is available. ]) 1565 fi 1566 1567 if test x"$ac_has_nanosleep" = x"yes"; then 1568 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1, 1569 [ Defined if nanosleep is available. ]) 1570 else 1571 AC_MSG_CHECKING([for sleep]) 1572 AC_TRY_COMPILE([#include <unistd.h>], 1573 [sleep(1)], 1574 [ac_has_sleep=yes],[ac_has_sleep=no]) 1575 if test x"$ac_has_sleep" = x"yes"; then 1576 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.]) 1577 fi 1578 AC_MSG_RESULT($ac_has_sleep) 1579 AC_MSG_CHECKING([for usleep]) 1580 AC_TRY_COMPILE([#include <unistd.h>], 1581 [sleep(1); 1582 usleep(100);], 1583 [ac_has_usleep=yes],[ac_has_usleep=no]) 1584 if test x"$ac_has_usleep" = x"yes"; then 1585 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.]) 1586 fi 1587 AC_MSG_RESULT($ac_has_usleep) 1588 fi 1589 1590 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then 1591 AC_MSG_CHECKING([for Sleep]) 1592 AC_TRY_COMPILE([#include <windows.h>], 1593 [Sleep(1)], 1594 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no]) 1595 if test x"$ac_has_win32_sleep" = x"yes"; then 1596 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.]) 1597 fi 1598 AC_MSG_RESULT($ac_has_win32_sleep) 1599 fi 1600 1601 AC_SUBST(GLIBCXX_LIBS) 1602 1603 CXXFLAGS="$ac_save_CXXFLAGS" 1604 LIBS="$ac_save_LIBS" 1605 AC_LANG_RESTORE 1606]) 1607 1608dnl 1609dnl Check for gettimeofday, used in the implementation of 20.11.7 1610dnl [time.clock] in the C++11 standard. 1611dnl 1612AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [ 1613 1614 AC_MSG_CHECKING([for gettimeofday]) 1615 1616 AC_LANG_SAVE 1617 AC_LANG_CPLUSPLUS 1618 ac_save_CXXFLAGS="$CXXFLAGS" 1619 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1620 1621 ac_has_gettimeofday=no; 1622 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no) 1623 if test x"$ac_has_sys_time_h" = x"yes"; then 1624 AC_MSG_CHECKING([for gettimeofday]) 1625 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>], 1626 [timeval tv; gettimeofday(&tv, 0);], 1627 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no]) 1628 1629 AC_MSG_RESULT($ac_has_gettimeofday) 1630 fi 1631 1632 if test x"$ac_has_gettimeofday" = x"yes"; then 1633 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1, 1634 [ Defined if gettimeofday is available. ]) 1635 fi 1636 1637 CXXFLAGS="$ac_save_CXXFLAGS" 1638 AC_LANG_RESTORE 1639]) 1640 1641dnl 1642dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1" 1643dnl facilities in Chapter 8, "C compatibility". 1644dnl 1645AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [ 1646 1647 AC_LANG_SAVE 1648 AC_LANG_CPLUSPLUS 1649 1650 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__ 1651 # undefined and fake C99 facilities may be spuriously enabled. 1652 ac_save_CXXFLAGS="$CXXFLAGS" 1653 CXXFLAGS="$CXXFLAGS -std=c++98" 1654 1655 # Check for the existence of <complex.h> complex math functions used 1656 # by tr1/complex. 1657 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 1658 ac_c99_complex_tr1=no; 1659 if test x"$ac_has_complex_h" = x"yes"; then 1660 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>]) 1661 AC_TRY_COMPILE([#include <complex.h>], 1662 [typedef __complex__ float float_type; float_type tmpf; 1663 cacosf(tmpf); 1664 casinf(tmpf); 1665 catanf(tmpf); 1666 cacoshf(tmpf); 1667 casinhf(tmpf); 1668 catanhf(tmpf); 1669 typedef __complex__ double double_type; double_type tmpd; 1670 cacos(tmpd); 1671 casin(tmpd); 1672 catan(tmpd); 1673 cacosh(tmpd); 1674 casinh(tmpd); 1675 catanh(tmpd); 1676 typedef __complex__ long double ld_type; ld_type tmpld; 1677 cacosl(tmpld); 1678 casinl(tmpld); 1679 catanl(tmpld); 1680 cacoshl(tmpld); 1681 casinhl(tmpld); 1682 catanhl(tmpld); 1683 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no]) 1684 fi 1685 AC_MSG_RESULT($ac_c99_complex_tr1) 1686 if test x"$ac_c99_complex_tr1" = x"yes"; then 1687 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1, 1688 [Define if C99 functions in <complex.h> should be used in 1689 <tr1/complex>. Using compiler builtins for these functions 1690 requires corresponding C99 library functions to be present.]) 1691 fi 1692 1693 # Check for the existence of <ctype.h> functions. 1694 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>]) 1695 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [ 1696 AC_TRY_COMPILE([#include <ctype.h>], 1697 [int ch; 1698 int ret; 1699 ret = isblank(ch); 1700 ],[glibcxx_cv_c99_ctype_tr1=yes], 1701 [glibcxx_cv_c99_ctype_tr1=no]) 1702 ]) 1703 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1) 1704 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then 1705 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1, 1706 [Define if C99 functions in <ctype.h> should be imported in 1707 <tr1/cctype> in namespace std::tr1.]) 1708 fi 1709 1710 # Check for the existence of <fenv.h> functions. 1711 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no) 1712 ac_c99_fenv_tr1=no; 1713 if test x"$ac_has_fenv_h" = x"yes"; then 1714 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>]) 1715 AC_TRY_COMPILE([#include <fenv.h>], 1716 [int except, mode; 1717 fexcept_t* pflag; 1718 fenv_t* penv; 1719 int ret; 1720 ret = feclearexcept(except); 1721 ret = fegetexceptflag(pflag, except); 1722 ret = feraiseexcept(except); 1723 ret = fesetexceptflag(pflag, except); 1724 ret = fetestexcept(except); 1725 ret = fegetround(); 1726 ret = fesetround(mode); 1727 ret = fegetenv(penv); 1728 ret = feholdexcept(penv); 1729 ret = fesetenv(penv); 1730 ret = feupdateenv(penv); 1731 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no]) 1732 fi 1733 AC_MSG_RESULT($ac_c99_fenv_tr1) 1734 if test x"$ac_c99_fenv_tr1" = x"yes"; then 1735 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1, 1736 [Define if C99 functions in <fenv.h> should be imported in 1737 <tr1/cfenv> in namespace std::tr1.]) 1738 fi 1739 1740 # Check for the existence of <stdint.h> types. 1741 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>]) 1742 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [ 1743 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS 1744 #define __STDC_CONSTANT_MACROS 1745 #include <stdint.h>], 1746 [typedef int8_t my_int8_t; 1747 my_int8_t i8 = INT8_MIN; 1748 i8 = INT8_MAX; 1749 typedef int16_t my_int16_t; 1750 my_int16_t i16 = INT16_MIN; 1751 i16 = INT16_MAX; 1752 typedef int32_t my_int32_t; 1753 my_int32_t i32 = INT32_MIN; 1754 i32 = INT32_MAX; 1755 typedef int64_t my_int64_t; 1756 my_int64_t i64 = INT64_MIN; 1757 i64 = INT64_MAX; 1758 typedef int_fast8_t my_int_fast8_t; 1759 my_int_fast8_t if8 = INT_FAST8_MIN; 1760 if8 = INT_FAST8_MAX; 1761 typedef int_fast16_t my_int_fast16_t; 1762 my_int_fast16_t if16 = INT_FAST16_MIN; 1763 if16 = INT_FAST16_MAX; 1764 typedef int_fast32_t my_int_fast32_t; 1765 my_int_fast32_t if32 = INT_FAST32_MIN; 1766 if32 = INT_FAST32_MAX; 1767 typedef int_fast64_t my_int_fast64_t; 1768 my_int_fast64_t if64 = INT_FAST64_MIN; 1769 if64 = INT_FAST64_MAX; 1770 typedef int_least8_t my_int_least8_t; 1771 my_int_least8_t il8 = INT_LEAST8_MIN; 1772 il8 = INT_LEAST8_MAX; 1773 typedef int_least16_t my_int_least16_t; 1774 my_int_least16_t il16 = INT_LEAST16_MIN; 1775 il16 = INT_LEAST16_MAX; 1776 typedef int_least32_t my_int_least32_t; 1777 my_int_least32_t il32 = INT_LEAST32_MIN; 1778 il32 = INT_LEAST32_MAX; 1779 typedef int_least64_t my_int_least64_t; 1780 my_int_least64_t il64 = INT_LEAST64_MIN; 1781 il64 = INT_LEAST64_MAX; 1782 typedef intmax_t my_intmax_t; 1783 my_intmax_t im = INTMAX_MAX; 1784 im = INTMAX_MIN; 1785 typedef intptr_t my_intptr_t; 1786 my_intptr_t ip = INTPTR_MAX; 1787 ip = INTPTR_MIN; 1788 typedef uint8_t my_uint8_t; 1789 my_uint8_t ui8 = UINT8_MAX; 1790 ui8 = UINT8_MAX; 1791 typedef uint16_t my_uint16_t; 1792 my_uint16_t ui16 = UINT16_MAX; 1793 ui16 = UINT16_MAX; 1794 typedef uint32_t my_uint32_t; 1795 my_uint32_t ui32 = UINT32_MAX; 1796 ui32 = UINT32_MAX; 1797 typedef uint64_t my_uint64_t; 1798 my_uint64_t ui64 = UINT64_MAX; 1799 ui64 = UINT64_MAX; 1800 typedef uint_fast8_t my_uint_fast8_t; 1801 my_uint_fast8_t uif8 = UINT_FAST8_MAX; 1802 uif8 = UINT_FAST8_MAX; 1803 typedef uint_fast16_t my_uint_fast16_t; 1804 my_uint_fast16_t uif16 = UINT_FAST16_MAX; 1805 uif16 = UINT_FAST16_MAX; 1806 typedef uint_fast32_t my_uint_fast32_t; 1807 my_uint_fast32_t uif32 = UINT_FAST32_MAX; 1808 uif32 = UINT_FAST32_MAX; 1809 typedef uint_fast64_t my_uint_fast64_t; 1810 my_uint_fast64_t uif64 = UINT_FAST64_MAX; 1811 uif64 = UINT_FAST64_MAX; 1812 typedef uint_least8_t my_uint_least8_t; 1813 my_uint_least8_t uil8 = UINT_LEAST8_MAX; 1814 uil8 = UINT_LEAST8_MAX; 1815 typedef uint_least16_t my_uint_least16_t; 1816 my_uint_least16_t uil16 = UINT_LEAST16_MAX; 1817 uil16 = UINT_LEAST16_MAX; 1818 typedef uint_least32_t my_uint_least32_t; 1819 my_uint_least32_t uil32 = UINT_LEAST32_MAX; 1820 uil32 = UINT_LEAST32_MAX; 1821 typedef uint_least64_t my_uint_least64_t; 1822 my_uint_least64_t uil64 = UINT_LEAST64_MAX; 1823 uil64 = UINT_LEAST64_MAX; 1824 typedef uintmax_t my_uintmax_t; 1825 my_uintmax_t uim = UINTMAX_MAX; 1826 uim = UINTMAX_MAX; 1827 typedef uintptr_t my_uintptr_t; 1828 my_uintptr_t uip = UINTPTR_MAX; 1829 uip = UINTPTR_MAX; 1830 ],[glibcxx_cv_c99_stdint_tr1=yes], 1831 [glibcxx_cv_c99_stdint_tr1=no]) 1832 ]) 1833 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1) 1834 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 1835 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1, 1836 [Define if C99 types in <stdint.h> should be imported in 1837 <tr1/cstdint> in namespace std::tr1.]) 1838 fi 1839 1840 # Check for the existence of <math.h> functions. 1841 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>]) 1842 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [ 1843 AC_TRY_COMPILE([#include <math.h>], 1844 [typedef double_t my_double_t; 1845 typedef float_t my_float_t; 1846 acosh(0.0); 1847 acoshf(0.0f); 1848 acoshl(0.0l); 1849 asinh(0.0); 1850 asinhf(0.0f); 1851 asinhl(0.0l); 1852 atanh(0.0); 1853 atanhf(0.0f); 1854 atanhl(0.0l); 1855 cbrt(0.0); 1856 cbrtf(0.0f); 1857 cbrtl(0.0l); 1858 copysign(0.0, 0.0); 1859 copysignf(0.0f, 0.0f); 1860 copysignl(0.0l, 0.0l); 1861 erf(0.0); 1862 erff(0.0f); 1863 erfl(0.0l); 1864 erfc(0.0); 1865 erfcf(0.0f); 1866 erfcl(0.0l); 1867 exp2(0.0); 1868 exp2f(0.0f); 1869 exp2l(0.0l); 1870 expm1(0.0); 1871 expm1f(0.0f); 1872 expm1l(0.0l); 1873 fdim(0.0, 0.0); 1874 fdimf(0.0f, 0.0f); 1875 fdiml(0.0l, 0.0l); 1876 fma(0.0, 0.0, 0.0); 1877 fmaf(0.0f, 0.0f, 0.0f); 1878 fmal(0.0l, 0.0l, 0.0l); 1879 fmax(0.0, 0.0); 1880 fmaxf(0.0f, 0.0f); 1881 fmaxl(0.0l, 0.0l); 1882 fmin(0.0, 0.0); 1883 fminf(0.0f, 0.0f); 1884 fminl(0.0l, 0.0l); 1885 hypot(0.0, 0.0); 1886 hypotf(0.0f, 0.0f); 1887 hypotl(0.0l, 0.0l); 1888 ilogb(0.0); 1889 ilogbf(0.0f); 1890 ilogbl(0.0l); 1891 lgamma(0.0); 1892 lgammaf(0.0f); 1893 lgammal(0.0l); 1894 #ifndef __APPLE__ /* see below */ 1895 llrint(0.0); 1896 llrintf(0.0f); 1897 llrintl(0.0l); 1898 llround(0.0); 1899 llroundf(0.0f); 1900 llroundl(0.0l); 1901 #endif 1902 log1p(0.0); 1903 log1pf(0.0f); 1904 log1pl(0.0l); 1905 log2(0.0); 1906 log2f(0.0f); 1907 log2l(0.0l); 1908 logb(0.0); 1909 logbf(0.0f); 1910 logbl(0.0l); 1911 lrint(0.0); 1912 lrintf(0.0f); 1913 lrintl(0.0l); 1914 lround(0.0); 1915 lroundf(0.0f); 1916 lroundl(0.0l); 1917 nan(0); 1918 nanf(0); 1919 nanl(0); 1920 nearbyint(0.0); 1921 nearbyintf(0.0f); 1922 nearbyintl(0.0l); 1923 nextafter(0.0, 0.0); 1924 nextafterf(0.0f, 0.0f); 1925 nextafterl(0.0l, 0.0l); 1926 nexttoward(0.0, 0.0); 1927 nexttowardf(0.0f, 0.0f); 1928 nexttowardl(0.0l, 0.0l); 1929 remainder(0.0, 0.0); 1930 remainderf(0.0f, 0.0f); 1931 remainderl(0.0l, 0.0l); 1932 remquo(0.0, 0.0, 0); 1933 remquof(0.0f, 0.0f, 0); 1934 remquol(0.0l, 0.0l, 0); 1935 rint(0.0); 1936 rintf(0.0f); 1937 rintl(0.0l); 1938 round(0.0); 1939 roundf(0.0f); 1940 roundl(0.0l); 1941 scalbln(0.0, 0l); 1942 scalblnf(0.0f, 0l); 1943 scalblnl(0.0l, 0l); 1944 scalbn(0.0, 0); 1945 scalbnf(0.0f, 0); 1946 scalbnl(0.0l, 0); 1947 tgamma(0.0); 1948 tgammaf(0.0f); 1949 tgammal(0.0l); 1950 trunc(0.0); 1951 truncf(0.0f); 1952 truncl(0.0l); 1953 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no]) 1954 ]) 1955 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1) 1956 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then 1957 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1, 1958 [Define if C99 functions or macros in <math.h> should be imported 1959 in <tr1/cmath> in namespace std::tr1.]) 1960 1961 case "${target_os}" in 1962 darwin*) 1963 AC_MSG_CHECKING([for ISO C99 rounding functions in <math.h>]) 1964 AC_CACHE_VAL(glibcxx_cv_c99_math_llround, [ 1965 AC_TRY_COMPILE([#include <math.h>], 1966 [llrint(0.0); 1967 llrintf(0.0f); 1968 llrintl(0.0l); 1969 llround(0.0); 1970 llroundf(0.0f); 1971 llroundl(0.0l); 1972 ], 1973 [glibcxx_cv_c99_math_llround=yes], 1974 [glibcxx_cv_c99_math_llround=no]) 1975 ]) 1976 AC_MSG_RESULT($glibcxx_cv_c99_math_llround) 1977 ;; 1978 esac 1979 if test x"$glibcxx_cv_c99_math_llround" = x"no"; then 1980 AC_DEFINE(_GLIBCXX_NO_C99_ROUNDING_FUNCS, 1, 1981 [Define if C99 llrint and llround functions are missing from <math.h>.]) 1982 fi 1983 fi 1984 1985 # Check for the existence of <inttypes.h> functions (NB: doesn't make 1986 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1). 1987 ac_c99_inttypes_tr1=no; 1988 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 1989 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>]) 1990 AC_TRY_COMPILE([#include <inttypes.h>], 1991 [intmax_t i, numer, denom, base; 1992 const char* s; 1993 char** endptr; 1994 intmax_t ret = imaxabs(i); 1995 imaxdiv_t dret = imaxdiv(numer, denom); 1996 ret = strtoimax(s, endptr, base); 1997 uintmax_t uret = strtoumax(s, endptr, base); 1998 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no]) 1999 fi 2000 AC_MSG_RESULT($ac_c99_inttypes_tr1) 2001 if test x"$ac_c99_inttypes_tr1" = x"yes"; then 2002 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1, 2003 [Define if C99 functions in <inttypes.h> should be imported in 2004 <tr1/cinttypes> in namespace std::tr1.]) 2005 fi 2006 2007 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't 2008 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1). 2009 ac_c99_inttypes_wchar_t_tr1=no; 2010 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 2011 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>]) 2012 AC_TRY_COMPILE([#include <inttypes.h>], 2013 [intmax_t base; 2014 const wchar_t* s; 2015 wchar_t** endptr; 2016 intmax_t ret = wcstoimax(s, endptr, base); 2017 uintmax_t uret = wcstoumax(s, endptr, base); 2018 ],[ac_c99_inttypes_wchar_t_tr1=yes], 2019 [ac_c99_inttypes_wchar_t_tr1=no]) 2020 fi 2021 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1) 2022 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then 2023 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1, 2024 [Define if wchar_t C99 functions in <inttypes.h> should be 2025 imported in <tr1/cinttypes> in namespace std::tr1.]) 2026 fi 2027 2028 # Check for the existence of the <stdbool.h> header. 2029 AC_CHECK_HEADERS(stdbool.h) 2030 2031 # Check for the existence of the <stdalign.h> header. 2032 AC_CHECK_HEADERS(stdalign.h) 2033 2034 CXXFLAGS="$ac_save_CXXFLAGS" 2035 AC_LANG_RESTORE 2036]) 2037 2038dnl 2039dnl Check for uchar.h and usability. 2040dnl 2041AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [ 2042 2043 # Test uchar.h. 2044 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no) 2045 2046 AC_LANG_SAVE 2047 AC_LANG_CPLUSPLUS 2048 ac_save_CXXFLAGS="$CXXFLAGS" 2049 CXXFLAGS="$CXXFLAGS -std=c++11" 2050 2051 if test x"$ac_has_uchar_h" = x"yes"; then 2052 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>]) 2053 AC_TRY_COMPILE([#include <uchar.h> 2054 #ifdef __STDC_UTF_16__ 2055 long i = __STDC_UTF_16__; 2056 #endif 2057 #ifdef __STDC_UTF_32__ 2058 long j = __STDC_UTF_32__; 2059 #endif 2060 namespace test 2061 { 2062 using ::c16rtomb; 2063 using ::c32rtomb; 2064 using ::mbrtoc16; 2065 using ::mbrtoc32; 2066 } 2067 ], 2068 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no]) 2069 else 2070 ac_c11_uchar_cxx11=no 2071 fi 2072 AC_MSG_RESULT($ac_c11_uchar_cxx11) 2073 if test x"$ac_c11_uchar_cxx11" = x"yes"; then 2074 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1, 2075 [Define if C11 functions in <uchar.h> should be imported into 2076 namespace std in <cuchar>.]) 2077 fi 2078 2079 CXXFLAGS="$ac_save_CXXFLAGS" 2080 AC_LANG_RESTORE 2081]) 2082 2083 2084dnl 2085dnl Check whether "/dev/random" and "/dev/urandom" are available for 2086dnl class std::random_device from C++ 2011 [rand.device], and 2087dnl random_device of "TR1" (Chapter 5.1, "Random number generation"). 2088dnl 2089AC_DEFUN([GLIBCXX_CHECK_DEV_RANDOM], [ 2090 2091 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for std::random_device]) 2092 AC_CACHE_VAL(glibcxx_cv_dev_random, [ 2093 if test -r /dev/random && test -r /dev/urandom; then 2094 ## For MSys environment the test above is detected as false-positive 2095 ## on mingw-targets. So disable it explicitly for them. 2096 case ${target_os} in 2097 *mingw*) glibcxx_cv_dev_random=no ;; 2098 *) glibcxx_cv_dev_random=yes ;; 2099 esac 2100 else 2101 glibcxx_cv_dev_random=no; 2102 fi 2103 ]) 2104 AC_MSG_RESULT($glibcxx_cv_dev_random) 2105 2106 if test x"$glibcxx_cv_dev_random" = x"yes"; then 2107 AC_DEFINE(_GLIBCXX_USE_DEV_RANDOM, 1, 2108 [Define if /dev/random and /dev/urandom are available for 2109 std::random_device.]) 2110 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1, 2111 [Define if /dev/random and /dev/urandom are available for 2112 the random_device of TR1 (Chapter 5.1).]) 2113 fi 2114 2115]) 2116 2117dnl 2118dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants. 2119dnl 2120AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [ 2121 2122 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [ 2123 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]], 2124 [#include <stdio.h>], 2125 [AC_MSG_ERROR([computing EOF failed])]) 2126 ]) 2127 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof, 2128 [Define to the value of the EOF integer constant.]) 2129 2130 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [ 2131 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]], 2132 [#include <stdio.h>], 2133 [AC_MSG_ERROR([computing SEEK_CUR failed])]) 2134 ]) 2135 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur, 2136 [Define to the value of the SEEK_CUR integer constant.]) 2137 2138 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [ 2139 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]], 2140 [#include <stdio.h>], 2141 [AC_MSG_ERROR([computing SEEK_END failed])]) 2142 ]) 2143 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end, 2144 [Define to the value of the SEEK_END integer constant.]) 2145]) 2146 2147dnl 2148dnl Check whether required C++ overloads are present in <stdio.h>. 2149dnl 2150AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [ 2151 2152 AC_LANG_SAVE 2153 AC_LANG_CPLUSPLUS 2154 # Use C++11 because a conforming <stdio.h> won't define gets for C++14, 2155 # and we don't need a declaration for C++14 anyway. 2156 ac_save_CXXFLAGS="$CXXFLAGS" 2157 CXXFLAGS="$CXXFLAGS -std=gnu++11" 2158 2159 AC_MSG_CHECKING([for gets declaration]) 2160 AC_CACHE_VAL(glibcxx_cv_gets, [ 2161 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2162 [#include <stdio.h> 2163 namespace test 2164 { 2165 using ::gets; 2166 } 2167 ])], 2168 [glibcxx_cv_gets=yes], 2169 [glibcxx_cv_gets=no] 2170 )]) 2171 2172 if test $glibcxx_cv_gets = yes; then 2173 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.]) 2174 fi 2175 AC_MSG_RESULT($glibcxx_cv_gets) 2176 2177 CXXFLAGS="$ac_save_CXXFLAGS" 2178 AC_LANG_RESTORE 2179]) 2180 2181dnl 2182dnl Check whether required C++11 overloads for floating point and integral 2183dnl types are present in <math.h>. 2184dnl 2185AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [ 2186 2187 AC_LANG_SAVE 2188 AC_LANG_CPLUSPLUS 2189 ac_save_CXXFLAGS="$CXXFLAGS" 2190 CXXFLAGS="$CXXFLAGS -std=c++11" 2191 2192 case "$host" in 2193 *-*-solaris2.*) 2194 # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch 2195 # 11996[67]-02 introduced the C++11 <math.h> floating point overloads. 2196 AC_MSG_CHECKING([for C++11 <math.h> floating point overloads]) 2197 AC_CACHE_VAL(glibcxx_cv_math11_fp_overload, [ 2198 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2199 [#include <math.h> 2200 #undef isfinite 2201 namespace std { 2202 inline bool isfinite(float __x) 2203 { return __builtin_isfinite(__x); } 2204 } 2205 ])], 2206 [glibcxx_cv_math11_fp_overload=no], 2207 [glibcxx_cv_math11_fp_overload=yes] 2208 )]) 2209 2210 # autoheader cannot handle indented templates. 2211 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP], 2212 [/* Define if all C++11 floating point overloads are available in <math.h>. */ 2213#if __cplusplus >= 201103L 2214#undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP 2215#endif]) 2216 2217 if test $glibcxx_cv_math11_fp_overload = yes; then 2218 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP) 2219 fi 2220 AC_MSG_RESULT([$glibcxx_cv_math11_fp_overload]) 2221 2222 # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch 2223 # 11996[67]-02 introduced the C++11 <math.h> integral type overloads. 2224 AC_MSG_CHECKING([for C++11 <math.h> integral type overloads]) 2225 AC_CACHE_VAL(glibcxx_cv_math11_int_overload, [ 2226 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2227 [#include <math.h> 2228 namespace std { 2229 template<typename _Tp> 2230 struct __is_integer; 2231 template<> 2232 struct __is_integer<int> 2233 { 2234 enum { __value = 1 }; 2235 }; 2236 } 2237 namespace __gnu_cxx { 2238 template<bool, typename> 2239 struct __enable_if; 2240 template<typename _Tp> 2241 struct __enable_if<true, _Tp> 2242 { typedef _Tp __type; }; 2243 } 2244 namespace std { 2245 template<typename _Tp> 2246 constexpr typename __gnu_cxx::__enable_if 2247 <__is_integer<_Tp>::__value, double>::__type 2248 log2(_Tp __x) 2249 { return __builtin_log2(__x); } 2250 } 2251 int 2252 main (void) 2253 { 2254 int i = 1000; 2255 return std::log2(i); 2256 } 2257 ])], 2258 [glibcxx_cv_math11_int_overload=no], 2259 [glibcxx_cv_math11_int_overload=yes] 2260 )]) 2261 2262 # autoheader cannot handle indented templates. 2263 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT], 2264 [/* Define if all C++11 integral type overloads are available in <math.h>. */ 2265#if __cplusplus >= 201103L 2266#undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT 2267#endif]) 2268 2269 if test $glibcxx_cv_math11_int_overload = yes; then 2270 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT) 2271 fi 2272 AC_MSG_RESULT([$glibcxx_cv_math11_int_overload]) 2273 ;; 2274 *) 2275 # If <math.h> defines the obsolete isinf(double) and isnan(double) 2276 # functions (instead of or as well as the C99 generic macros) then we 2277 # can't define std::isinf(double) and std::isnan(double) in <cmath> 2278 # and must use the ones from <math.h> instead. 2279 AC_MSG_CHECKING([for obsolete isinf function in <math.h>]) 2280 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf, [ 2281 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2282 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS 2283 #include <math.h> 2284 #undef isinf 2285 namespace std { 2286 using ::isinf; 2287 bool isinf(float); 2288 bool isinf(long double); 2289 } 2290 using std::isinf; 2291 bool b = isinf(0.0); 2292 ])], 2293 [glibcxx_cv_obsolete_isinf=yes], 2294 [glibcxx_cv_obsolete_isinf=no] 2295 )]) 2296 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf]) 2297 if test $glibcxx_cv_obsolete_isinf = yes; then 2298 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1, 2299 [Define if <math.h> defines obsolete isinf function.]) 2300 fi 2301 2302 AC_MSG_CHECKING([for obsolete isnan function in <math.h>]) 2303 AC_CACHE_VAL(glibcxx_cv_obsolete_isnan, [ 2304 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2305 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS 2306 #include <math.h> 2307 #undef isnan 2308 namespace std { 2309 using ::isnan; 2310 bool isnan(float); 2311 bool isnan(long double); 2312 } 2313 using std::isnan; 2314 bool b = isnan(0.0); 2315 ])], 2316 [glibcxx_cv_obsolete_isnan=yes], 2317 [glibcxx_cv_obsolete_isnan=no] 2318 )]) 2319 AC_MSG_RESULT([$glibcxx_cv_obsolete_isnan]) 2320 if test $glibcxx_cv_obsolete_isnan = yes; then 2321 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1, 2322 [Define if <math.h> defines obsolete isnan function.]) 2323 fi 2324 ;; 2325 esac 2326 2327 CXXFLAGS="$ac_save_CXXFLAGS" 2328 AC_LANG_RESTORE 2329]) 2330 2331dnl 2332dnl Check whether macros, etc are present for <system_error> 2333dnl 2334AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [ 2335 2336m4_pushdef([n_syserr], [1])dnl 2337m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA, 2338 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED, 2339 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY, 2340 ECHILD, ENOSPC, EPERM, 2341 ETIMEDOUT, EWOULDBLOCK], 2342[m4_pushdef([SYSERR], m4_toupper(syserr))dnl 2343AC_MSG_CHECKING([for syserr]) 2344AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [ 2345AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]], 2346 [int i = syserr;])], 2347 [glibcxx_cv_system_error[]n_syserr=yes], 2348 [glibcxx_cv_system_error[]n_syserr=no]) 2349]) 2350AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr]) 2351if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then 2352 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.]) 2353fi 2354m4_define([n_syserr], m4_incr(n_syserr))dnl 2355m4_popdef([SYSERR])dnl 2356]) 2357m4_popdef([n_syserr])dnl 2358]) 2359 2360dnl 2361dnl Check for what type of C headers to use. 2362dnl 2363dnl --enable-cheaders= [does stuff]. 2364dnl --disable-cheaders [does not do anything, really]. 2365dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)] 2366dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'. 2367dnl 2368AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [ 2369 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]], 2370 [construct "C" headers for g++], [permit c|c_std|c_global]) 2371 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders) 2372 2373 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders 2374 2375 # Allow overrides to configure.host here. 2376 if test $enable_cheaders = c_global; then 2377 c_compatibility=yes 2378 fi 2379 2380 AC_SUBST(C_INCLUDE_DIR) 2381 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c) 2382 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std) 2383 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global) 2384 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes) 2385]) 2386 2387 2388dnl 2389dnl Check for which locale library to use. The choice is mapped to 2390dnl a subdirectory of config/locale. 2391dnl 2392dnl Default is generic. 2393dnl 2394AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [ 2395 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]], 2396 [use MODEL for target locale package], 2397 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto]) 2398 2399 # Deal with gettext issues. Default to not using it (=no) until we detect 2400 # support for it later. Let the user turn it off via --e/d, but let that 2401 # default to on for easier handling. 2402 USE_NLS=no 2403 AC_ARG_ENABLE(nls, 2404 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]), 2405 [], 2406 [enable_nls=yes]) 2407 2408 # Either a known package, or "auto" 2409 if test $enable_clocale = no || test $enable_clocale = yes; then 2410 enable_clocale=auto 2411 fi 2412 enable_clocale_flag=$enable_clocale 2413 2414 # Probe for locale model to use if none specified. 2415 # Default to "generic". 2416 if test $enable_clocale_flag = auto; then 2417 case ${target_os} in 2418 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) 2419 enable_clocale_flag=gnu 2420 ;; 2421 darwin*) 2422 enable_clocale_flag=darwin 2423 ;; 2424 dragonfly* | freebsd*) 2425 enable_clocale_flag=dragonfly 2426 ;; 2427 openbsd*) 2428 enable_clocale_flag=newlib 2429 ;; 2430 *) 2431 if test x"$with_newlib" = x"yes"; then 2432 enable_clocale_flag=newlib 2433 else 2434 enable_clocale_flag=generic 2435 fi 2436 ;; 2437 esac 2438 fi 2439 2440 # Sanity check model, and test for special functionality. 2441 if test $enable_clocale_flag = gnu; then 2442 AC_EGREP_CPP([_GLIBCXX_ok], [ 2443 #include <features.h> 2444 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__) 2445 _GLIBCXX_ok 2446 #endif 2447 ], enable_clocale_flag=gnu, enable_clocale_flag=generic) 2448 2449 # Set it to scream when it hurts. 2450 ac_save_CFLAGS="$CFLAGS" 2451 CFLAGS="-Wimplicit-function-declaration -Werror" 2452 2453 # Use strxfrm_l if available. 2454 AC_TRY_COMPILE([#define _GNU_SOURCE 1 2455 #include <string.h> 2456 #include <locale.h>], 2457 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);], 2458 AC_DEFINE(HAVE_STRXFRM_L, 1, 2459 [Define if strxfrm_l is available in <string.h>.]),) 2460 2461 # Use strerror_l if available. 2462 AC_TRY_COMPILE([#define _GNU_SOURCE 1 2463 #include <string.h> 2464 #include <locale.h>], 2465 [__locale_t loc; strerror_l(5, loc);], 2466 AC_DEFINE(HAVE_STRERROR_L, 1, 2467 [Define if strerror_l is available in <string.h>.]),) 2468 2469 CFLAGS="$ac_save_CFLAGS" 2470 fi 2471 2472 # Perhaps use strerror_r if available, and strerror_l isn't. 2473 ac_save_CFLAGS="$CFLAGS" 2474 CFLAGS="-Wimplicit-function-declaration -Werror" 2475 AC_TRY_COMPILE([#define _GNU_SOURCE 1 2476 #include <string.h> 2477 #include <locale.h>], 2478 [char s[128]; strerror_r(5, s, 128);], 2479 AC_DEFINE(HAVE_STRERROR_R, 1, 2480 [Define if strerror_r is available in <string.h>.]),) 2481 CFLAGS="$ac_save_CFLAGS" 2482 2483 # Set configure bits for specified locale package 2484 AC_MSG_CHECKING([for C locale to use]) 2485 case ${enable_clocale_flag} in 2486 generic) 2487 AC_MSG_RESULT(generic) 2488 2489 CLOCALE_H=config/locale/generic/c_locale.h 2490 CLOCALE_CC=config/locale/generic/c_locale.cc 2491 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2492 CCOLLATE_CC=config/locale/generic/collate_members.cc 2493 CCTYPE_CC=config/locale/generic/ctype_members.cc 2494 CMESSAGES_H=config/locale/generic/messages_members.h 2495 CMESSAGES_CC=config/locale/generic/messages_members.cc 2496 CMONEY_CC=config/locale/generic/monetary_members.cc 2497 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2498 CTIME_H=config/locale/generic/time_members.h 2499 CTIME_CC=config/locale/generic/time_members.cc 2500 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2501 ;; 2502 darwin) 2503 AC_MSG_RESULT(darwin) 2504 2505 CLOCALE_H=config/locale/generic/c_locale.h 2506 CLOCALE_CC=config/locale/generic/c_locale.cc 2507 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2508 CCOLLATE_CC=config/locale/generic/collate_members.cc 2509 CCTYPE_CC=config/locale/darwin/ctype_members.cc 2510 CMESSAGES_H=config/locale/generic/messages_members.h 2511 CMESSAGES_CC=config/locale/generic/messages_members.cc 2512 CMONEY_CC=config/locale/generic/monetary_members.cc 2513 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2514 CTIME_H=config/locale/generic/time_members.h 2515 CTIME_CC=config/locale/generic/time_members.cc 2516 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2517 ;; 2518 2519 dragonfly) 2520 AC_MSG_RESULT(dragonfly or freebsd) 2521 2522 CLOCALE_H=config/locale/dragonfly/c_locale.h 2523 CLOCALE_CC=config/locale/dragonfly/c_locale.cc 2524 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc 2525 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc 2526 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc 2527 CMESSAGES_H=config/locale/generic/messages_members.h 2528 CMESSAGES_CC=config/locale/generic/messages_members.cc 2529 CMONEY_CC=config/locale/dragonfly/monetary_members.cc 2530 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc 2531 CTIME_H=config/locale/dragonfly/time_members.h 2532 CTIME_CC=config/locale/dragonfly/time_members.cc 2533 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2534 ;; 2535 2536 gnu) 2537 AC_MSG_RESULT(gnu) 2538 2539 # Declare intention to use gettext, and add support for specific 2540 # languages. 2541 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT 2542 ALL_LINGUAS="de fr" 2543 2544 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc. 2545 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no) 2546 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then 2547 USE_NLS=yes 2548 fi 2549 # Export the build objects. 2550 for ling in $ALL_LINGUAS; do \ 2551 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \ 2552 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \ 2553 done 2554 AC_SUBST(glibcxx_MOFILES) 2555 AC_SUBST(glibcxx_POFILES) 2556 2557 CLOCALE_H=config/locale/gnu/c_locale.h 2558 CLOCALE_CC=config/locale/gnu/c_locale.cc 2559 CCODECVT_CC=config/locale/gnu/codecvt_members.cc 2560 CCOLLATE_CC=config/locale/gnu/collate_members.cc 2561 CCTYPE_CC=config/locale/gnu/ctype_members.cc 2562 CMESSAGES_H=config/locale/gnu/messages_members.h 2563 CMESSAGES_CC=config/locale/gnu/messages_members.cc 2564 CMONEY_CC=config/locale/gnu/monetary_members.cc 2565 CNUMERIC_CC=config/locale/gnu/numeric_members.cc 2566 CTIME_H=config/locale/gnu/time_members.h 2567 CTIME_CC=config/locale/gnu/time_members.cc 2568 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h 2569 ;; 2570 ieee_1003.1-2001) 2571 AC_MSG_RESULT(IEEE 1003.1) 2572 2573 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h 2574 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc 2575 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2576 CCOLLATE_CC=config/locale/generic/collate_members.cc 2577 CCTYPE_CC=config/locale/generic/ctype_members.cc 2578 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h 2579 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc 2580 CMONEY_CC=config/locale/generic/monetary_members.cc 2581 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2582 CTIME_H=config/locale/generic/time_members.h 2583 CTIME_CC=config/locale/generic/time_members.cc 2584 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2585 ;; 2586 newlib) 2587 AC_MSG_RESULT(newlib) 2588 2589 CLOCALE_H=config/locale/generic/c_locale.h 2590 CLOCALE_CC=config/locale/generic/c_locale.cc 2591 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2592 CCOLLATE_CC=config/locale/generic/collate_members.cc 2593 CCTYPE_CC=config/locale/newlib/ctype_members.cc 2594 CMESSAGES_H=config/locale/generic/messages_members.h 2595 CMESSAGES_CC=config/locale/generic/messages_members.cc 2596 CMONEY_CC=config/locale/generic/monetary_members.cc 2597 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2598 CTIME_H=config/locale/generic/time_members.h 2599 CTIME_CC=config/locale/generic/time_members.cc 2600 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2601 ;; 2602 esac 2603 2604 # This is where the testsuite looks for locale catalogs, using the 2605 # -DLOCALEDIR define during testsuite compilation. 2606 glibcxx_localedir=${glibcxx_builddir}/po/share/locale 2607 AC_SUBST(glibcxx_localedir) 2608 2609 # A standalone libintl (e.g., GNU libintl) may be in use. 2610 if test $USE_NLS = yes; then 2611 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no) 2612 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no) 2613 fi 2614 if test $USE_NLS = yes; then 2615 AC_DEFINE(_GLIBCXX_USE_NLS, 1, 2616 [Define if NLS translations are to be used.]) 2617 fi 2618 2619 AC_SUBST(USE_NLS) 2620 AC_SUBST(CLOCALE_H) 2621 AC_SUBST(CMESSAGES_H) 2622 AC_SUBST(CCODECVT_CC) 2623 AC_SUBST(CCOLLATE_CC) 2624 AC_SUBST(CCTYPE_CC) 2625 AC_SUBST(CMESSAGES_CC) 2626 AC_SUBST(CMONEY_CC) 2627 AC_SUBST(CNUMERIC_CC) 2628 AC_SUBST(CTIME_H) 2629 AC_SUBST(CTIME_CC) 2630 AC_SUBST(CLOCALE_CC) 2631 AC_SUBST(CLOCALE_INTERNAL_H) 2632]) 2633 2634 2635dnl 2636dnl Check for which std::allocator base class to use. The choice is 2637dnl mapped from a subdirectory of include/ext. 2638dnl 2639dnl Default is new. 2640dnl 2641AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [ 2642 AC_MSG_CHECKING([for std::allocator base class]) 2643 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]], 2644 [use KIND for target std::allocator base], 2645 [permit new|malloc|mt|bitmap|pool|yes|no|auto]) 2646 2647 # If they didn't use this option switch, or if they specified --enable 2648 # with no specific model, we'll have to look for one. If they 2649 # specified --disable (???), do likewise. 2650 if test $enable_libstdcxx_allocator = no || 2651 test $enable_libstdcxx_allocator = yes; 2652 then 2653 enable_libstdcxx_allocator=auto 2654 fi 2655 2656 # Either a known package, or "auto". Auto implies the default choice 2657 # for a particular platform. 2658 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator 2659 2660 # Probe for host-specific support if no specific model is specified. 2661 # Default to "new". 2662 if test $enable_libstdcxx_allocator_flag = auto; then 2663 case ${target_os} in 2664 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) 2665 enable_libstdcxx_allocator_flag=new 2666 ;; 2667 *) 2668 enable_libstdcxx_allocator_flag=new 2669 ;; 2670 esac 2671 fi 2672 AC_MSG_RESULT($enable_libstdcxx_allocator_flag) 2673 2674 2675 # Set configure bits for specified locale package 2676 case ${enable_libstdcxx_allocator_flag} in 2677 bitmap) 2678 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h 2679 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator 2680 ;; 2681 malloc) 2682 ALLOCATOR_H=config/allocator/malloc_allocator_base.h 2683 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator 2684 ;; 2685 mt) 2686 ALLOCATOR_H=config/allocator/mt_allocator_base.h 2687 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc 2688 ;; 2689 new) 2690 ALLOCATOR_H=config/allocator/new_allocator_base.h 2691 ALLOCATOR_NAME=__gnu_cxx::new_allocator 2692 ;; 2693 pool) 2694 ALLOCATOR_H=config/allocator/pool_allocator_base.h 2695 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc 2696 ;; 2697 esac 2698 2699 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW, 2700 test $enable_libstdcxx_allocator_flag = new) 2701 AC_SUBST(ALLOCATOR_H) 2702 AC_SUBST(ALLOCATOR_NAME) 2703]) 2704 2705 2706dnl 2707dnl Check for whether the Boost-derived checks should be turned on. 2708dnl 2709dnl --enable-concept-checks turns them on. 2710dnl --disable-concept-checks leaves them off. 2711dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)] 2712dnl Where DEFAULT is either `yes' or `no'. 2713dnl 2714AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [ 2715 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks]) 2716 if test $enable_concept_checks = yes; then 2717 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1, 2718 [Define to use concept checking code from the boost libraries.]) 2719 fi 2720]) 2721 2722dnl 2723dnl Use extern templates. 2724dnl 2725dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1 2726dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0 2727 2728dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)] 2729dnl Where DEFAULT is `yes' or `no'. 2730dnl 2731AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [ 2732 2733 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template]) 2734 2735 AC_MSG_CHECKING([for extern template support]) 2736 AC_MSG_RESULT([$enable_extern_template]) 2737 2738 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes) 2739]) 2740 2741dnl 2742dnl Use vtable verification. 2743dnl 2744dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1 2745dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0 2746 2747dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)] 2748dnl Where DEFAULT is `yes' or `no'. 2749dnl 2750AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [ 2751 2752 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify]) 2753 2754 AC_MSG_CHECKING([for vtable verify support]) 2755 AC_MSG_RESULT([$enable_vtable_verify]) 2756 2757 vtv_cygmin=no 2758 if test $enable_vtable_verify = yes; then 2759 case ${target_os} in 2760 cygwin*|mingw32*) 2761 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end" 2762 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs" 2763 vtv_cygmin=yes 2764 ;; 2765 darwin*) 2766 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end" 2767 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs" 2768 ;; 2769 solaris2*) 2770 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end" 2771 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs" 2772 ;; 2773 *) 2774 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end" 2775 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs" 2776 ;; 2777 esac 2778 VTV_PCH_CXXFLAGS="-fvtable-verify=std" 2779 else 2780 VTV_CXXFLAGS= 2781 VTV_PCH_CXXFLAGS= 2782 VTV_CXXLINKFLAGS= 2783 fi 2784 2785 AC_SUBST(VTV_CXXFLAGS) 2786 AC_SUBST(VTV_PCH_CXXFLAGS) 2787 AC_SUBST(VTV_CXXLINKFLAGS) 2788 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes) 2789 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes) 2790]) 2791 2792dnl 2793dnl Check for parallel mode pre-requisites, including OpenMP support. 2794dnl 2795dnl + Usage: GLIBCXX_ENABLE_PARALLEL 2796dnl 2797AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [ 2798 2799 enable_parallel=no; 2800 2801 # See if configured libgomp/omp.h exists. (libgomp may be in 2802 # noconfigdirs but not explicitly disabled.) 2803 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then 2804 enable_parallel=yes; 2805 else 2806 AC_MSG_NOTICE([target-libgomp not built]) 2807 fi 2808 2809 AC_MSG_CHECKING([for parallel mode support]) 2810 AC_MSG_RESULT([$enable_parallel]) 2811]) 2812 2813 2814dnl 2815dnl Check for which I/O library to use: stdio, or something specific. 2816dnl 2817dnl Default is stdio. 2818dnl 2819AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [ 2820 AC_MSG_CHECKING([for underlying I/O to use]) 2821 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]], 2822 [use target-specific I/O package], [permit stdio]) 2823 2824 # Now that libio has been removed, you can have any color you want as long 2825 # as it's black. This is one big no-op until other packages are added, but 2826 # showing the framework never hurts. 2827 case ${enable_cstdio} in 2828 stdio) 2829 CSTDIO_H=config/io/c_io_stdio.h 2830 BASIC_FILE_H=config/io/basic_file_stdio.h 2831 BASIC_FILE_CC=config/io/basic_file_stdio.cc 2832 AC_MSG_RESULT(stdio) 2833 ;; 2834 esac 2835 2836 AC_SUBST(CSTDIO_H) 2837 AC_SUBST(BASIC_FILE_H) 2838 AC_SUBST(BASIC_FILE_CC) 2839]) 2840 2841 2842dnl 2843dnl Check for "unusual" flags to pass to the compiler while building. 2844dnl 2845dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing 2846dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc. 2847dnl --disable-cxx-flags passes nothing. 2848dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html 2849dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html 2850dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html 2851dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags) 2852dnl If "default flags" is an empty string, the effect is the same 2853dnl as --disable or --enable=no. 2854dnl 2855AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl 2856 AC_MSG_CHECKING([for extra compiler flags for building]) 2857 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS], 2858 [pass compiler FLAGS when building library], 2859 [case "x$enable_cxx_flags" in 2860 xno | x) enable_cxx_flags= ;; 2861 x-*) ;; 2862 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 2863 esac]) 2864 2865 # Run through flags (either default or command-line) and set anything 2866 # extra (e.g., #defines) that must accompany particular g++ options. 2867 if test -n "$enable_cxx_flags"; then 2868 for f in $enable_cxx_flags; do 2869 case "$f" in 2870 -fhonor-std) ;; 2871 -*) ;; 2872 *) # and we're trying to pass /what/ exactly? 2873 AC_MSG_ERROR([compiler flags start with a -]) ;; 2874 esac 2875 done 2876 fi 2877 2878 EXTRA_CXX_FLAGS="$enable_cxx_flags" 2879 AC_MSG_RESULT($EXTRA_CXX_FLAGS) 2880 AC_SUBST(EXTRA_CXX_FLAGS) 2881]) 2882 2883 2884dnl 2885dnl Check to see if debugging libraries are to be built. 2886dnl 2887dnl --enable-libstdcxx-debug 2888dnl builds a separate set of debugging libraries in addition to the 2889dnl normal (shared, static) libstdc++ binaries. 2890dnl 2891dnl --disable-libstdcxx-debug 2892dnl builds only one (non-debug) version of libstdc++. 2893dnl 2894dnl --enable-libstdcxx-debug-flags=FLAGS 2895dnl iff --enable-debug == yes, then use FLAGS to build the debug library. 2896dnl 2897dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)] 2898dnl Where DEFAULT is either `yes' or `no'. 2899dnl 2900AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [ 2901 AC_MSG_CHECKING([for additional debug build]) 2902 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library]) 2903 AC_MSG_RESULT($enable_libstdcxx_debug) 2904 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes) 2905]) 2906 2907 2908dnl 2909dnl Check for explicit debug flags. 2910dnl 2911dnl --enable-libstdcxx-debug-flags='-O1' 2912dnl is a general method for passing flags to be used when 2913dnl building debug libraries with --enable-libstdcxx-debug. 2914dnl 2915dnl --disable-libstdcxx-debug-flags does nothing. 2916dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags) 2917dnl If "default flags" is an empty string, the effect is the same 2918dnl as --disable or --enable=no. 2919dnl 2920AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [ 2921 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS], 2922 [pass compiler FLAGS when building debug library], 2923 [case "x$enable_libstdcxx_debug_flags" in 2924 xno | x) enable_libstdcxx_debug_flags= ;; 2925 x-*) ;; 2926 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 2927 esac]) 2928 2929 # Option parsed, now set things appropriately 2930 DEBUG_FLAGS="$enable_libstdcxx_debug_flags" 2931 AC_SUBST(DEBUG_FLAGS) 2932 2933 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS]) 2934]) 2935 2936 2937dnl 2938dnl Check if the user only wants a freestanding library implementation. 2939dnl 2940dnl --disable-hosted-libstdcxx will turn off most of the library build, 2941dnl installing only the headers required by [17.4.1.3] and the language 2942dnl support library. More than that will be built (to keep the Makefiles 2943dnl conveniently clean), but not installed. 2944dnl 2945dnl Sets: 2946dnl is_hosted (yes/no) 2947dnl 2948dnl Defines: 2949dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0) 2950dnl 2951AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [ 2952 AC_ARG_ENABLE([hosted-libstdcxx], 2953 AC_HELP_STRING([--disable-hosted-libstdcxx], 2954 [only build freestanding C++ runtime support]),, 2955 [case "$host" in 2956 arm*-*-symbianelf*) 2957 enable_hosted_libstdcxx=no 2958 ;; 2959 *) 2960 enable_hosted_libstdcxx=yes 2961 ;; 2962 esac]) 2963 if test "$enable_hosted_libstdcxx" = no; then 2964 AC_MSG_NOTICE([Only freestanding libraries will be built]) 2965 is_hosted=no 2966 hosted_define=0 2967 enable_abi_check=no 2968 enable_libstdcxx_pch=no 2969 else 2970 is_hosted=yes 2971 hosted_define=1 2972 fi 2973 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes) 2974 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define, 2975 [Define to 1 if a full hosted library is built, or 0 if freestanding.]) 2976]) 2977 2978 2979dnl 2980dnl Check if the user wants a non-verbose library implementation. 2981dnl 2982dnl --disable-libstdcxx-verbose will turn off descriptive messages to 2983dnl standard error on termination. 2984dnl 2985dnl Defines: 2986dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0) 2987dnl 2988AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [ 2989 AC_ARG_ENABLE([libstdcxx-verbose], 2990 AC_HELP_STRING([--disable-libstdcxx-verbose], 2991 [disable termination messages to standard error]),, 2992 [enable_libstdcxx_verbose=yes]) 2993 if test x"$enable_libstdcxx_verbose" = xyes; then 2994 verbose_define=1 2995 else 2996 AC_MSG_NOTICE([verbose termination messages are disabled]) 2997 verbose_define=0 2998 fi 2999 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define, 3000 [Define to 1 if a verbose library is built, or 0 otherwise.]) 3001]) 3002 3003 3004dnl 3005dnl Check for template specializations for the 'long long' type. 3006dnl The result determines only whether 'long long' I/O is enabled; things 3007dnl like numeric_limits<> specializations are always available. 3008dnl 3009dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG 3010dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined 3011dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)] 3012dnl Where DEFAULT is either `yes' or `no'. 3013dnl 3014AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [ 3015 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long']) 3016 if test $enable_long_long = yes; then 3017 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1, 3018 [Define if code specialized for long long should be used.]) 3019 fi 3020 AC_MSG_CHECKING([for enabled long long specializations]) 3021 AC_MSG_RESULT([$enable_long_long]) 3022]) 3023 3024 3025dnl 3026dnl Check for decimal floating point. 3027dnl See: 3028dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float 3029dnl 3030dnl This checks to see if the host supports decimal floating point types. 3031dnl 3032dnl Defines: 3033dnl _GLIBCXX_USE_DECIMAL_FLOAT 3034dnl 3035AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [ 3036 3037 # Fake what AC_TRY_COMPILE does, without linking as this is 3038 # unnecessary for this test. 3039 3040 cat > conftest.$ac_ext << EOF 3041[#]line __oline__ "configure" 3042int main() 3043{ 3044 _Decimal32 d1; 3045 _Decimal64 d2; 3046 _Decimal128 d3; 3047 return 0; 3048} 3049EOF 3050 3051 AC_MSG_CHECKING([for ISO/IEC TR 24733 ]) 3052 if AC_TRY_EVAL(ac_compile); then 3053 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1, 3054 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.]) 3055 enable_dfp=yes 3056 else 3057 enable_dfp=no 3058 fi 3059 AC_MSG_RESULT($enable_dfp) 3060 rm -f conftest* 3061]) 3062 3063dnl 3064dnl Check for GNU 128-bit integer and floating point types. 3065dnl 3066dnl Note: also checks that the types aren't standard types. 3067dnl 3068dnl Defines: 3069dnl _GLIBCXX_USE_INT128 3070dnl ENABLE_FLOAT128 3071dnl 3072AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [ 3073 3074 AC_LANG_SAVE 3075 AC_LANG_CPLUSPLUS 3076 3077 # Fake what AC_TRY_COMPILE does, without linking as this is 3078 # unnecessary for this test. 3079 3080 cat > conftest.$ac_ext << EOF 3081[#]line __oline__ "configure" 3082template<typename T1, typename T2> 3083 struct same 3084 { typedef T2 type; }; 3085 3086template<typename T> 3087 struct same<T, T>; 3088 3089int main() 3090{ 3091 typename same<long, __int128>::type i1; 3092 typename same<long long, __int128>::type i2; 3093} 3094EOF 3095 3096 AC_MSG_CHECKING([for __int128]) 3097 if AC_TRY_EVAL(ac_compile); then 3098 AC_DEFINE(_GLIBCXX_USE_INT128, 1, 3099 [Define if __int128 is supported on this host.]) 3100 enable_int128=yes 3101 else 3102 enable_int128=no 3103 fi 3104 AC_MSG_RESULT($enable_int128) 3105 rm -f conftest* 3106 3107 cat > conftest.$ac_ext << EOF 3108[#]line __oline__ "configure" 3109template<typename T1, typename T2> 3110 struct same 3111 { typedef T2 type; }; 3112 3113template<typename T> 3114 struct same<T, T>; 3115 3116int main() 3117{ 3118 typename same<double, __float128>::type f1; 3119 typename same<long double, __float128>::type f2; 3120} 3121EOF 3122 3123 AC_MSG_CHECKING([for __float128]) 3124 if AC_TRY_EVAL(ac_compile); then 3125 enable_float128=yes 3126 else 3127 enable_float128=no 3128 fi 3129 AC_MSG_RESULT($enable_float128) 3130 GLIBCXX_CONDITIONAL(ENABLE_FLOAT128, test $enable_float128 = yes) 3131 rm -f conftest* 3132 3133 AC_LANG_RESTORE 3134]) 3135 3136dnl 3137dnl Check for template specializations for the 'wchar_t' type. 3138dnl 3139dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T 3140dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined 3141dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)] 3142dnl Where DEFAULT is either `yes' or `no'. 3143dnl 3144dnl Necessary support must also be present. 3145dnl 3146AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [ 3147 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t']) 3148 3149 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos. 3150 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no) 3151 AC_MSG_CHECKING([for mbstate_t]) 3152 AC_TRY_COMPILE([#include <wchar.h>], 3153 [mbstate_t teststate;], 3154 have_mbstate_t=yes, have_mbstate_t=no) 3155 AC_MSG_RESULT($have_mbstate_t) 3156 if test x"$have_mbstate_t" = xyes; then 3157 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.]) 3158 fi 3159 3160 # Test it always, for use in GLIBCXX_ENABLE_C99, together with 3161 # ac_has_wchar_h. 3162 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no) 3163 3164 if test x"$enable_wchar_t" = x"yes"; then 3165 3166 AC_LANG_SAVE 3167 AC_LANG_CPLUSPLUS 3168 3169 if test x"$ac_has_wchar_h" = xyes && 3170 test x"$ac_has_wctype_h" = xyes; then 3171 AC_TRY_COMPILE([#include <wchar.h> 3172 #include <stddef.h> 3173 wint_t i; 3174 long l = WEOF; 3175 long j = WCHAR_MIN; 3176 long k = WCHAR_MAX; 3177 namespace test 3178 { 3179 using ::btowc; 3180 using ::fgetwc; 3181 using ::fgetws; 3182 using ::fputwc; 3183 using ::fputws; 3184 using ::fwide; 3185 using ::fwprintf; 3186 using ::fwscanf; 3187 using ::getwc; 3188 using ::getwchar; 3189 using ::mbrlen; 3190 using ::mbrtowc; 3191 using ::mbsinit; 3192 using ::mbsrtowcs; 3193 using ::putwc; 3194 using ::putwchar; 3195 using ::swprintf; 3196 using ::swscanf; 3197 using ::ungetwc; 3198 using ::vfwprintf; 3199 using ::vswprintf; 3200 using ::vwprintf; 3201 using ::wcrtomb; 3202 using ::wcscat; 3203 using ::wcschr; 3204 using ::wcscmp; 3205 using ::wcscoll; 3206 using ::wcscpy; 3207 using ::wcscspn; 3208 using ::wcsftime; 3209 using ::wcslen; 3210 using ::wcsncat; 3211 using ::wcsncmp; 3212 using ::wcsncpy; 3213 using ::wcspbrk; 3214 using ::wcsrchr; 3215 using ::wcsrtombs; 3216 using ::wcsspn; 3217 using ::wcsstr; 3218 using ::wcstod; 3219 using ::wcstok; 3220 using ::wcstol; 3221 using ::wcstoul; 3222 using ::wcsxfrm; 3223 using ::wctob; 3224 using ::wmemchr; 3225 using ::wmemcmp; 3226 using ::wmemcpy; 3227 using ::wmemmove; 3228 using ::wmemset; 3229 using ::wprintf; 3230 using ::wscanf; 3231 } 3232 ],[],[], [enable_wchar_t=no]) 3233 else 3234 enable_wchar_t=no 3235 fi 3236 3237 AC_LANG_RESTORE 3238 fi 3239 3240 if test x"$enable_wchar_t" = x"yes"; then 3241 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1, 3242 [Define if code specialized for wchar_t should be used.]) 3243 fi 3244 3245 AC_MSG_CHECKING([for enabled wchar_t specializations]) 3246 AC_MSG_RESULT([$enable_wchar_t]) 3247]) 3248 3249 3250dnl 3251dnl Check to see if building and using a C++ precompiled header can be done. 3252dnl 3253dnl --enable-libstdcxx-pch=yes 3254dnl default, this shows intent to use stdc++.h.gch If it looks like it 3255dnl may work, after some light-hearted attempts to puzzle out compiler 3256dnl support, flip bits on in include/Makefile.am 3257dnl 3258dnl --disable-libstdcxx-pch 3259dnl turns off attempts to use or build stdc++.h.gch. 3260dnl 3261dnl Substs: 3262dnl glibcxx_PCHFLAGS 3263dnl 3264AC_DEFUN([GLIBCXX_ENABLE_PCH], [ 3265 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers]) 3266 if test $enable_libstdcxx_pch = yes; then 3267 AC_CACHE_CHECK([for compiler with PCH support], 3268 [glibcxx_cv_prog_CXX_pch], 3269 [ac_save_CXXFLAGS="$CXXFLAGS" 3270 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated" 3271 AC_LANG_SAVE 3272 AC_LANG_CPLUSPLUS 3273 echo '#include <math.h>' > conftest.h 3274 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \ 3275 -o conftest.h.gch 1>&5 2>&1 && 3276 echo '#error "pch failed"' > conftest.h && 3277 echo '#include "conftest.h"' > conftest.cc && 3278 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ; 3279 then 3280 glibcxx_cv_prog_CXX_pch=yes 3281 else 3282 glibcxx_cv_prog_CXX_pch=no 3283 fi 3284 rm -f conftest* 3285 CXXFLAGS=$ac_save_CXXFLAGS 3286 AC_LANG_RESTORE 3287 ]) 3288 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch 3289 fi 3290 3291 AC_MSG_CHECKING([for enabled PCH]) 3292 AC_MSG_RESULT([$enable_libstdcxx_pch]) 3293 3294 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes) 3295 if test $enable_libstdcxx_pch = yes; then 3296 glibcxx_PCHFLAGS="-include bits/stdc++.h" 3297 else 3298 glibcxx_PCHFLAGS="" 3299 fi 3300 AC_SUBST(glibcxx_PCHFLAGS) 3301]) 3302 3303 3304dnl 3305dnl Check for atomic builtins. 3306dnl See: 3307dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html 3308dnl 3309dnl This checks to see if the host supports the compiler-generated 3310dnl builtins for atomic operations for various integral sizes. Note, this 3311dnl is intended to be an all-or-nothing switch, so all the atomic operations 3312dnl that are used should be checked. 3313dnl 3314dnl Note: 3315dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD. 3316dnl 3317AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [ 3318 AC_LANG_SAVE 3319 AC_LANG_CPLUSPLUS 3320 old_CXXFLAGS="$CXXFLAGS" 3321 3322 # Do link tests if possible, instead asm tests, limited to some platforms 3323 # see discussion in PR target/40134, PR libstdc++/40133 and the thread 3324 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html 3325 atomic_builtins_link_tests=no 3326 if test x$gcc_no_link != xyes; then 3327 # Can do link tests. Limit to some tested platforms 3328 case "$host" in 3329 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*) 3330 atomic_builtins_link_tests=yes 3331 ;; 3332 esac 3333 fi 3334 3335 if test x$atomic_builtins_link_tests = xyes; then 3336 3337 # Do link tests. 3338 3339 CXXFLAGS="$CXXFLAGS -fno-exceptions" 3340 3341 AC_MSG_CHECKING([for atomic builtins for bool]) 3342 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [ 3343 AC_TRY_LINK( 3344 [ ], 3345 [typedef bool atomic_type; 3346 atomic_type c1; 3347 atomic_type c2; 3348 atomic_type c3(0); 3349 // N.B. __atomic_fetch_add is not supported for bool. 3350 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3351 __ATOMIC_RELAXED); 3352 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3353 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3354 ], 3355 [glibcxx_cv_atomic_bool=yes], 3356 [glibcxx_cv_atomic_bool=no]) 3357 ]) 3358 AC_MSG_RESULT($glibcxx_cv_atomic_bool) 3359 3360 AC_MSG_CHECKING([for atomic builtins for short]) 3361 AC_CACHE_VAL(glibcxx_cv_atomic_short, [ 3362 AC_TRY_LINK( 3363 [ ], 3364 [typedef short atomic_type; 3365 atomic_type c1; 3366 atomic_type c2; 3367 atomic_type c3(0); 3368 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3369 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3370 __ATOMIC_RELAXED); 3371 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3372 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3373 ], 3374 [glibcxx_cv_atomic_short=yes], 3375 [glibcxx_cv_atomic_short=no]) 3376 ]) 3377 AC_MSG_RESULT($glibcxx_cv_atomic_short) 3378 3379 AC_MSG_CHECKING([for atomic builtins for int]) 3380 AC_CACHE_VAL(glibcxx_cv_atomic_int, [ 3381 AC_TRY_LINK( 3382 [ ], 3383 [typedef int atomic_type; 3384 atomic_type c1; 3385 atomic_type c2; 3386 atomic_type c3(0); 3387 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3388 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3389 __ATOMIC_RELAXED); 3390 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3391 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3392 ], 3393 [glibcxx_cv_atomic_int=yes], 3394 [glibcxx_cv_atomic_int=no]) 3395 ]) 3396 AC_MSG_RESULT($glibcxx_cv_atomic_int) 3397 3398 AC_MSG_CHECKING([for atomic builtins for long long]) 3399 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [ 3400 AC_TRY_LINK( 3401 [ ], 3402 [typedef long long atomic_type; 3403 atomic_type c1; 3404 atomic_type c2; 3405 atomic_type c3(0); 3406 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3407 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3408 __ATOMIC_RELAXED); 3409 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3410 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3411 ], 3412 [glibcxx_cv_atomic_long_long=yes], 3413 [glibcxx_cv_atomic_long_long=no]) 3414 ]) 3415 AC_MSG_RESULT($glibcxx_cv_atomic_long_long) 3416 3417 else 3418 3419 # Do asm tests. 3420 3421 # Compile unoptimized. 3422 CXXFLAGS='-O0 -S' 3423 3424 # Fake what AC_TRY_COMPILE does. 3425 3426 cat > conftest.$ac_ext << EOF 3427[#]line __oline__ "configure" 3428int main() 3429{ 3430 typedef bool atomic_type; 3431 atomic_type c1; 3432 atomic_type c2; 3433 atomic_type c3(0); 3434 // N.B. __atomic_fetch_add is not supported for bool. 3435 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3436 __ATOMIC_RELAXED); 3437 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3438 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3439 3440 return 0; 3441} 3442EOF 3443 3444 AC_MSG_CHECKING([for atomic builtins for bool]) 3445 if AC_TRY_EVAL(ac_compile); then 3446 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3447 glibcxx_cv_atomic_bool=no 3448 else 3449 glibcxx_cv_atomic_bool=yes 3450 fi 3451 fi 3452 AC_MSG_RESULT($glibcxx_cv_atomic_bool) 3453 rm -f conftest* 3454 3455 cat > conftest.$ac_ext << EOF 3456[#]line __oline__ "configure" 3457int main() 3458{ 3459 typedef short atomic_type; 3460 atomic_type c1; 3461 atomic_type c2; 3462 atomic_type c3(0); 3463 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3464 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3465 __ATOMIC_RELAXED); 3466 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3467 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3468 3469 return 0; 3470} 3471EOF 3472 3473 AC_MSG_CHECKING([for atomic builtins for short]) 3474 if AC_TRY_EVAL(ac_compile); then 3475 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3476 glibcxx_cv_atomic_short=no 3477 else 3478 glibcxx_cv_atomic_short=yes 3479 fi 3480 fi 3481 AC_MSG_RESULT($glibcxx_cv_atomic_short) 3482 rm -f conftest* 3483 3484 cat > conftest.$ac_ext << EOF 3485[#]line __oline__ "configure" 3486int main() 3487{ 3488 // NB: _Atomic_word not necessarily int. 3489 typedef int atomic_type; 3490 atomic_type c1; 3491 atomic_type c2; 3492 atomic_type c3(0); 3493 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3494 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3495 __ATOMIC_RELAXED); 3496 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3497 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3498 3499 return 0; 3500} 3501EOF 3502 3503 AC_MSG_CHECKING([for atomic builtins for int]) 3504 if AC_TRY_EVAL(ac_compile); then 3505 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3506 glibcxx_cv_atomic_int=no 3507 else 3508 glibcxx_cv_atomic_int=yes 3509 fi 3510 fi 3511 AC_MSG_RESULT($glibcxx_cv_atomic_int) 3512 rm -f conftest* 3513 3514 cat > conftest.$ac_ext << EOF 3515[#]line __oline__ "configure" 3516int main() 3517{ 3518 typedef long long atomic_type; 3519 atomic_type c1; 3520 atomic_type c2; 3521 atomic_type c3(0); 3522 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3523 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3524 __ATOMIC_RELAXED); 3525 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3526 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3527 3528 return 0; 3529} 3530EOF 3531 3532 AC_MSG_CHECKING([for atomic builtins for long long]) 3533 if AC_TRY_EVAL(ac_compile); then 3534 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3535 glibcxx_cv_atomic_long_long=no 3536 else 3537 glibcxx_cv_atomic_long_long=yes 3538 fi 3539 fi 3540 AC_MSG_RESULT($glibcxx_cv_atomic_long_long) 3541 rm -f conftest* 3542 3543 fi 3544 3545 CXXFLAGS="$old_CXXFLAGS" 3546 AC_LANG_RESTORE 3547 3548 # Set atomicity_dir to builtins if all but the long long test above passes, 3549 # or if the builtins were already chosen (e.g. by configure.host). 3550 if { test "$glibcxx_cv_atomic_bool" = yes \ 3551 && test "$glibcxx_cv_atomic_short" = yes \ 3552 && test "$glibcxx_cv_atomic_int" = yes; } \ 3553 || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then 3554 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1, 3555 [Define if the compiler supports C++11 atomics.]) 3556 atomicity_dir=cpu/generic/atomicity_builtins 3557 fi 3558 3559 # If still generic, set to mutex. 3560 if test $atomicity_dir = "cpu/generic" ; then 3561 atomicity_dir=cpu/generic/atomicity_mutex 3562 AC_MSG_WARN([No native atomic operations are provided for this platform.]) 3563 if test "x$target_thread_file" = xsingle; then 3564 AC_MSG_WARN([They cannot be faked when thread support is disabled.]) 3565 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.]) 3566 else 3567 AC_MSG_WARN([They will be faked using a mutex.]) 3568 AC_MSG_WARN([Performance of certain classes will degrade as a result.]) 3569 fi 3570 fi 3571 3572]) 3573 3574dnl 3575dnl Set default lock policy for synchronizing shared_ptr reference counting. 3576dnl 3577dnl --with-libstdcxx-lock-policy=auto 3578dnl Use atomic operations for shared_ptr reference counting only if 3579dnl the default target supports atomic compare-and-swap. 3580dnl --with-libstdcxx-lock-policy=atomic 3581dnl Use atomic operations for shared_ptr reference counting. 3582dnl --with-libstdcxx-lock-policy=mutex 3583dnl Use a mutex to synchronize shared_ptr reference counting. 3584dnl 3585dnl This controls the value of __gnu_cxx::__default_lock_policy, which 3586dnl determines how shared_ptr reference counts are synchronized. 3587dnl The option "atomic" means that atomic operations should be used, 3588dnl "mutex" means that a mutex will be used. The default option, "auto", 3589dnl will check if the target supports the compiler-generated builtins 3590dnl for atomic compare-and-swap operations for 2-byte and 4-byte integers, 3591dnl and will use "atomic" if supported, "mutex" otherwise. 3592dnl This option is ignored if the thread model used by GCC is "single", 3593dnl as no synchronization is used at all in that case. 3594dnl This option affects the library ABI (except in the "single" thread model). 3595dnl 3596dnl Defines _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY to 1 if atomics should be used. 3597dnl 3598AC_DEFUN([GLIBCXX_ENABLE_LOCK_POLICY], [ 3599 3600 AC_ARG_WITH([libstdcxx-lock-policy], 3601 AC_HELP_STRING([--with-libstdcxx-lock-policy={atomic,mutex,auto}], 3602 [synchronization policy for shared_ptr reference counting [default=auto]]), 3603 [libstdcxx_atomic_lock_policy=$withval], 3604 [libstdcxx_atomic_lock_policy=auto]) 3605 3606 case "$libstdcxx_atomic_lock_policy" in 3607 atomic|mutex|auto) ;; 3608 *) AC_MSG_ERROR([Invalid argument for --with-libstdcxx-lock-policy]) ;; 3609 esac 3610 AC_MSG_CHECKING([for lock policy for shared_ptr reference counts]) 3611 3612 if test x"$libstdcxx_atomic_lock_policy" = x"auto"; then 3613 AC_LANG_SAVE 3614 AC_LANG_CPLUSPLUS 3615 ac_save_CXXFLAGS="$CXXFLAGS" 3616 3617 dnl Why do we care about 2-byte CAS on targets with 4-byte _Atomic_word?! 3618 AC_TRY_COMPILE([ 3619 #if ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 3620 # error "No 2-byte compare-and-swap" 3621 #elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 3622 # error "No 4-byte compare-and-swap" 3623 #endif 3624 ],, 3625 [libstdcxx_atomic_lock_policy=atomic], 3626 [libstdcxx_atomic_lock_policy=mutex]) 3627 AC_LANG_RESTORE 3628 CXXFLAGS="$ac_save_CXXFLAGS" 3629 fi 3630 3631 if test x"$libstdcxx_atomic_lock_policy" = x"atomic"; then 3632 AC_MSG_RESULT(atomic) 3633 AC_DEFINE(HAVE_ATOMIC_LOCK_POLICY,1, 3634 [Defined if shared_ptr reference counting should use atomic operations.]) 3635 else 3636 AC_MSG_RESULT(mutex) 3637 fi 3638 3639]) 3640 3641dnl 3642dnl Allow visibility attributes to be used on namespaces, objects, etc. 3643dnl 3644dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes. 3645dnl --disable-libstdcxx-visibility turns off all use of visibility attributes. 3646dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)] 3647dnl Where DEFAULT is 'yes'. 3648dnl 3649AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [ 3650GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage]) 3651 3652if test x$enable_libstdcxx_visibility = xyes ; then 3653 dnl all hail libgfortran 3654 dnl Check whether the target supports hidden visibility. 3655 AC_CACHE_CHECK([whether the target supports hidden visibility], 3656 glibcxx_cv_have_attribute_visibility, [ 3657 save_CFLAGS="$CFLAGS" 3658 CFLAGS="$CFLAGS -Werror" 3659 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }], 3660 [], glibcxx_cv_have_attribute_visibility=yes, 3661 glibcxx_cv_have_attribute_visibility=no) 3662 CFLAGS="$save_CFLAGS"]) 3663 if test $glibcxx_cv_have_attribute_visibility = no; then 3664 enable_libstdcxx_visibility=no 3665 fi 3666fi 3667 3668GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes) 3669AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility]) 3670]) 3671 3672 3673dnl 3674dnl Add version tags to symbols in shared library (or not), additionally 3675dnl marking other symbols as private/local (or not). 3676dnl 3677dnl Sets libtool_VERSION, and determines shared library SONAME. 3678dnl 3679dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no. 3680dnl 3681dnl --enable-symvers=style adds a version script to the linker call when 3682dnl creating the shared library. The choice of version script is 3683dnl controlled by 'style'. 3684dnl --disable-symvers does not. 3685dnl 3686dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)] 3687dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to 3688dnl choose a default style based on linker characteristics. Passing 3689dnl 'no' disables versioning. 3690dnl 3691AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [ 3692 3693GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]], 3694 [enables symbol versioning of the shared library], 3695 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun]) 3696 3697# If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we 3698# don't know enough about $LD to do tricks... 3699AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES]) 3700# Sun style symbol versions needs GNU c++filt for make_sunver.pl to work 3701# with extern "C++" in version scripts. 3702AC_REQUIRE([GCC_PROG_GNU_CXXFILT]) 3703 3704# Turn a 'yes' into a suitable default. 3705if test x$enable_symvers = xyes ; then 3706 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then 3707 enable_symvers=no 3708 else 3709 if test $with_gnu_ld = yes ; then 3710 case ${target_os} in 3711 hpux*) 3712 enable_symvers=no ;; 3713 *) 3714 enable_symvers=gnu ;; 3715 esac 3716 else 3717 case ${target_os} in 3718 darwin*) 3719 enable_symvers=darwin ;; 3720 # Sun symbol versioning exists since Solaris 2.5. 3721 solaris2.[[5-9]]* | solaris2.1[[0-9]]*) 3722 # make_sunver.pl needs GNU c++filt to support extern "C++" in 3723 # version scripts, so disable symbol versioning if none can be 3724 # found. 3725 if test -z "$ac_cv_path_CXXFILT"; then 3726 AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) 3727 AC_MSG_WARN([=== no GNU c++filt could be found.]) 3728 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3729 enable_symvers=no 3730 else 3731 enable_symvers=sun 3732 fi 3733 ;; 3734 *) 3735 enable_symvers=no ;; 3736 esac 3737 fi 3738 fi 3739fi 3740 3741# Check to see if 'darwin' or 'darwin-export' can win. 3742if test x$enable_symvers = xdarwin-export ; then 3743 enable_symvers=darwin 3744fi 3745 3746# Check if 'sun' was requested on non-Solaris 2 platforms. 3747if test x$enable_symvers = xsun ; then 3748 case ${target_os} in 3749 solaris2*) 3750 # All fine. 3751 ;; 3752 *) 3753 # Unlikely to work. 3754 AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) 3755 AC_MSG_WARN([=== you are not targetting Solaris 2.]) 3756 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3757 enable_symvers=no 3758 ;; 3759 esac 3760fi 3761 3762# Check to see if 'gnu' can win. 3763if test $enable_symvers = gnu || 3764 test $enable_symvers = gnu-versioned-namespace || 3765 test $enable_symvers = sun; then 3766 # Check to see if libgcc_s exists, indicating that shared libgcc is possible. 3767 AC_MSG_CHECKING([for shared libgcc]) 3768 ac_save_CFLAGS="$CFLAGS" 3769 CFLAGS=' -lgcc_s' 3770 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no) 3771 CFLAGS="$ac_save_CFLAGS" 3772 if test $glibcxx_shared_libgcc = no; then 3773 cat > conftest.c <<EOF 3774int main (void) { return 0; } 3775EOF 3776changequote(,)dnl 3777 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ 3778 -shared -shared-libgcc -o conftest.so \ 3779 conftest.c -v 2>&1 >/dev/null \ 3780 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` 3781changequote([,])dnl 3782 rm -f conftest.c conftest.so 3783 if test x${glibcxx_libgcc_s_suffix+set} = xset; then 3784 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix" 3785 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes) 3786 CFLAGS="$ac_save_CFLAGS" 3787 fi 3788 fi 3789 AC_MSG_RESULT($glibcxx_shared_libgcc) 3790 3791 # For GNU ld, we need at least this version. The format is described in 3792 # GLIBCXX_CHECK_LINKER_FEATURES above. 3793 glibcxx_min_gnu_ld_version=21400 3794 3795 # If no shared libgcc, can't win. 3796 if test $glibcxx_shared_libgcc != yes; then 3797 AC_MSG_WARN([=== You have requested GNU symbol versioning, but]) 3798 AC_MSG_WARN([=== you are not building a shared libgcc_s.]) 3799 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3800 enable_symvers=no 3801 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then 3802 : All interesting versions of Sun ld support sun style symbol versioning. 3803 elif test $with_gnu_ld != yes ; then 3804 # just fail for now 3805 AC_MSG_WARN([=== You have requested GNU symbol versioning, but]) 3806 AC_MSG_WARN([=== you are not using the GNU linker.]) 3807 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3808 enable_symvers=no 3809 elif test $glibcxx_ld_is_gold = yes ; then 3810 : All versions of gold support symbol versioning. 3811 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then 3812 # The right tools, the right setup, but too old. Fallbacks? 3813 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for) 3814 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.) 3815 AC_MSG_WARN(=== You would need to upgrade your binutils to version) 3816 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.) 3817 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3818 enable_symvers=no 3819 fi 3820fi 3821 3822# For libtool versioning info, format is CURRENT:REVISION:AGE 3823libtool_VERSION=6:26:0 3824 3825# Everything parsed; figure out what files and settings to use. 3826case $enable_symvers in 3827 no) 3828 SYMVER_FILE=config/abi/pre/none.ver 3829 ;; 3830 gnu) 3831 SYMVER_FILE=config/abi/pre/gnu.ver 3832 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1, 3833 [Define to use GNU versioning in the shared library.]) 3834 ;; 3835 gnu-versioned-namespace) 3836 libtool_VERSION=8:0:0 3837 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver 3838 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1, 3839 [Define to use GNU namespace versioning in the shared library.]) 3840 ;; 3841 darwin) 3842 SYMVER_FILE=config/abi/pre/gnu.ver 3843 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1, 3844 [Define to use darwin versioning in the shared library.]) 3845 ;; 3846 sun) 3847 SYMVER_FILE=config/abi/pre/gnu.ver 3848 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1, 3849 [Define to use Sun versioning in the shared library.]) 3850 ;; 3851esac 3852 3853if test x$enable_symvers != xno ; then 3854 AC_DEFINE(_GLIBCXX_SYMVER, 1, 3855 [Define to use symbol versioning in the shared library.]) 3856fi 3857 3858AC_CACHE_CHECK([whether the target supports .symver directive], 3859 glibcxx_cv_have_as_symver_directive, [ 3860 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");], 3861 [], glibcxx_cv_have_as_symver_directive=yes, 3862 glibcxx_cv_have_as_symver_directive=no)]) 3863if test $glibcxx_cv_have_as_symver_directive = yes; then 3864 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1, 3865 [Define to 1 if the target assembler supports .symver directive.]) 3866fi 3867 3868AC_SUBST(SYMVER_FILE) 3869AC_SUBST(port_specific_symbol_files) 3870GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no) 3871GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu) 3872GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace) 3873GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin) 3874GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun) 3875AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers) 3876 3877if test $enable_symvers != no ; then 3878 case ${target_os} in 3879 # The Solaris 2 runtime linker doesn't support the GNU extension of 3880 # binding the same symbol to different versions 3881 solaris2*) 3882 ;; 3883 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do. 3884 *) 3885 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1, 3886 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.]) 3887 ;; 3888 esac 3889fi 3890 3891# Now, set up compatibility support, if any. 3892# In addition, need this to deal with std::size_t mangling in 3893# src/compatibility.cc. In a perfect world, could use 3894# typeid(std::size_t).name()[0] to do direct substitution. 3895AC_MSG_CHECKING([for size_t as unsigned int]) 3896ac_save_CFLAGS="$CFLAGS" 3897CFLAGS="-Werror" 3898AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;], 3899 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no]) 3900CFLAGS=$ac_save_CFLAGS 3901if test "$glibcxx_size_t_is_i" = yes; then 3902 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.]) 3903fi 3904AC_MSG_RESULT([$glibcxx_size_t_is_i]) 3905 3906AC_MSG_CHECKING([for ptrdiff_t as int]) 3907ac_save_CFLAGS="$CFLAGS" 3908CFLAGS="-Werror" 3909AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;], 3910 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no]) 3911CFLAGS=$ac_save_CFLAGS 3912if test "$glibcxx_ptrdiff_t_is_i" = yes; then 3913 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.]) 3914fi 3915AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i]) 3916]) 3917 3918 3919dnl 3920dnl Setup to use the gcc gthr.h thread-specific memory and mutex model. 3921dnl We must stage the required headers so that they will be installed 3922dnl with the library (unlike libgcc, the STL implementation is provided 3923dnl solely within headers). Since we must not inject random user-space 3924dnl macro names into user-provided C++ code, we first stage into <file>-in 3925dnl and process to <file> with an output command. The reason for a two- 3926dnl stage process here is to correctly handle $srcdir!=$objdir without 3927dnl having to write complex code (the sed commands to clean the macro 3928dnl namespace are complex and fragile enough as it is). We must also 3929dnl add a relative path so that -I- is supported properly. 3930dnl 3931dnl Substs: 3932dnl thread_header 3933dnl 3934AC_DEFUN([GLIBCXX_ENABLE_THREADS], [ 3935 AC_MSG_CHECKING([for thread model used by GCC]) 3936 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` 3937 AC_MSG_RESULT([$target_thread_file]) 3938 GCC_AC_THREAD_HEADER([$target_thread_file]) 3939]) 3940 3941 3942dnl 3943dnl Check if gthread implementation defines the types and functions 3944dnl required by the c++0x thread library. Conforming gthread 3945dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x. 3946dnl 3947dnl GLIBCXX_ENABLE_SYMVERS must be done before this. 3948dnl 3949AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [ 3950 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support]) 3951 3952 if test x$enable_libstdcxx_threads = xauto || 3953 test x$enable_libstdcxx_threads = xyes; then 3954 3955 AC_LANG_SAVE 3956 AC_LANG_CPLUSPLUS 3957 3958 ac_save_CXXFLAGS="$CXXFLAGS" 3959 CXXFLAGS="$CXXFLAGS -fno-exceptions \ 3960 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc" 3961 3962 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` 3963 case $target_thread_file in 3964 posix) 3965 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS" 3966 esac 3967 3968 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available]) 3969 3970 AC_TRY_COMPILE([#include <unistd.h>], 3971 [ 3972 // In case of POSIX threads check _POSIX_TIMEOUTS. 3973 #if (defined(_PTHREADS) \ 3974 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0)) 3975 #error 3976 #endif 3977 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0]) 3978 3979 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock, 3980 [Define to 1 if mutex_timedlock is available.]) 3981 3982 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ; 3983 else res_mutex_timedlock=no ; fi 3984 AC_MSG_RESULT([$res_mutex_timedlock]) 3985 3986 AC_MSG_CHECKING([for gthreads library]) 3987 3988 AC_TRY_COMPILE([#include "gthr.h"], 3989 [ 3990 #ifndef __GTHREADS_CXX0X 3991 #error 3992 #endif 3993 ], [ac_has_gthreads=yes], [ac_has_gthreads=no]) 3994 else 3995 ac_has_gthreads=no 3996 fi 3997 3998 AC_MSG_RESULT([$ac_has_gthreads]) 3999 4000 if test x"$ac_has_gthreads" = x"yes"; then 4001 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1, 4002 [Define if gthreads library is available.]) 4003 4004 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14 4005 AC_CHECK_TYPE([pthread_rwlock_t], 4006 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1, 4007 [Define if POSIX read/write locks are available in <gthr.h>.])], 4008 [], 4009 [#include "gthr.h"]) 4010 fi 4011 4012 CXXFLAGS="$ac_save_CXXFLAGS" 4013 AC_LANG_RESTORE 4014]) 4015 4016 4017# Check whether LC_MESSAGES is available in <locale.h>. 4018# Ulrich Drepper <drepper@cygnus.com>, 1995. 4019# 4020# This file file be copied and used freely without restrictions. It can 4021# be used in projects which are not available under the GNU Public License 4022# but which still want to provide support for the GNU gettext functionality. 4023# Please note that the actual code is *not* freely available. 4024AC_DEFUN([AC_LC_MESSAGES], [ 4025 AC_CHECK_HEADER(locale.h, [ 4026 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES, 4027 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES], 4028 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)]) 4029 if test $ac_cv_val_LC_MESSAGES = yes; then 4030 AC_DEFINE(HAVE_LC_MESSAGES, 1, 4031 [Define if LC_MESSAGES is available in <locale.h>.]) 4032 fi 4033 ]) 4034]) 4035 4036dnl 4037dnl Check whether rdrand is supported in the assembler. 4038AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [ 4039 AC_MSG_CHECKING([for rdrand support in assembler]) 4040 AC_CACHE_VAL(ac_cv_x86_rdrand, [ 4041 ac_cv_x86_rdrand=no 4042 case "$target" in 4043 i?86-*-* | \ 4044 x86_64-*-*) 4045 AC_TRY_COMPILE(, [asm("rdrand %eax");], 4046 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no]) 4047 esac 4048 ]) 4049 if test $ac_cv_x86_rdrand = yes; then 4050 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1, 4051 [ Defined if as can handle rdrand. ]) 4052 fi 4053 AC_MSG_RESULT($ac_cv_x86_rdrand) 4054]) 4055 4056dnl 4057dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS. 4058dnl 4059AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [ 4060 4061 AC_LANG_SAVE 4062 AC_LANG_CPLUSPLUS 4063 ac_save_CXXFLAGS="$CXXFLAGS" 4064 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4065 4066 AC_MSG_CHECKING([for get_nprocs]) 4067 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [ 4068 GCC_TRY_COMPILE_OR_LINK( 4069 [#include <sys/sysinfo.h>], 4070 [int n = get_nprocs();], 4071 [glibcxx_cv_GET_NPROCS=yes], 4072 [glibcxx_cv_GET_NPROCS=no]) 4073 ]) 4074 if test $glibcxx_cv_GET_NPROCS = yes; then 4075 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.]) 4076 fi 4077 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS) 4078 4079 CXXFLAGS="$ac_save_CXXFLAGS" 4080 AC_LANG_RESTORE 4081]) 4082 4083dnl 4084dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN. 4085dnl 4086AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [ 4087 4088 AC_LANG_SAVE 4089 AC_LANG_CPLUSPLUS 4090 ac_save_CXXFLAGS="$CXXFLAGS" 4091 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4092 4093 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN]) 4094 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [ 4095 GCC_TRY_COMPILE_OR_LINK( 4096 [#include <unistd.h>], 4097 [int n = sysconf(_SC_NPROCESSORS_ONLN);], 4098 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes], 4099 [glibcxx_cv_SC_NPROCESSORS_ONLN=no]) 4100 ]) 4101 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then 4102 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.]) 4103 fi 4104 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN) 4105 4106 CXXFLAGS="$ac_save_CXXFLAGS" 4107 AC_LANG_RESTORE 4108]) 4109 4110dnl 4111dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN. 4112dnl 4113AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [ 4114 4115 AC_LANG_SAVE 4116 AC_LANG_CPLUSPLUS 4117 ac_save_CXXFLAGS="$CXXFLAGS" 4118 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4119 4120 AC_MSG_CHECKING([for _SC_NPROC_ONLN]) 4121 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [ 4122 GCC_TRY_COMPILE_OR_LINK( 4123 [#include <unistd.h>], 4124 [int n = sysconf(_SC_NPROC_ONLN);], 4125 [glibcxx_cv_SC_NPROC_ONLN=yes], 4126 [glibcxx_cv_SC_NPROC_ONLN=no]) 4127 ]) 4128 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then 4129 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.]) 4130 fi 4131 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN) 4132 4133 CXXFLAGS="$ac_save_CXXFLAGS" 4134 AC_LANG_RESTORE 4135]) 4136 4137dnl 4138dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP. 4139dnl 4140AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [ 4141 4142 AC_LANG_SAVE 4143 AC_LANG_CPLUSPLUS 4144 ac_save_CXXFLAGS="$CXXFLAGS" 4145 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4146 4147 AC_MSG_CHECKING([for pthreads_num_processors_np]) 4148 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [ 4149 GCC_TRY_COMPILE_OR_LINK( 4150 [#include <pthread.h>], 4151 [int n = pthread_num_processors_np();], 4152 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes], 4153 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no]) 4154 ]) 4155 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then 4156 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.]) 4157 fi 4158 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP) 4159 4160 CXXFLAGS="$ac_save_CXXFLAGS" 4161 AC_LANG_RESTORE 4162]) 4163 4164dnl 4165dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU. 4166dnl 4167AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [ 4168 4169 AC_LANG_SAVE 4170 AC_LANG_CPLUSPLUS 4171 ac_save_CXXFLAGS="$CXXFLAGS" 4172 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4173 4174 AC_MSG_CHECKING([for hw.ncpu sysctl]) 4175 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [ 4176 GCC_TRY_COMPILE_OR_LINK( 4177 [ 4178 #include <stddef.h> 4179 #include <sys/sysctl.h> 4180 ], 4181 [ 4182 int count; 4183 size_t size = sizeof(count); 4184 int mib[] = { CTL_HW, HW_NCPU }; 4185 sysctl(mib, 2, &count, &size, NULL, 0); 4186 ], 4187 [glibcxx_cv_SYSCTL_HW_NCPU=yes], 4188 [glibcxx_cv_SYSCTL_HW_NCPU=no]) 4189 ]) 4190 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then 4191 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.]) 4192 fi 4193 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU) 4194 4195 CXXFLAGS="$ac_save_CXXFLAGS" 4196 AC_LANG_RESTORE 4197]) 4198 4199dnl 4200dnl Check to see if python pretty printing can be activated. 4201dnl 4202dnl --with-python-dir=dir 4203dnl installs directory into $prefix/dir 4204AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [ 4205 4206AC_MSG_CHECKING([for custom python install directory]) 4207AC_ARG_WITH([python-dir], 4208 AS_HELP_STRING([--with-python-dir], 4209 [the location to install Python modules. This path is relative starting from the prefix.]), 4210 [with_python_dir=$withval], [with_python_dir="no"]) 4211AC_MSG_RESULT(${with_python_dir}) 4212 4213# Needed for installing Python modules during make install. 4214python_mod_dir="${with_python_dir}" 4215AC_SUBST(python_mod_dir) 4216GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no) 4217]) 4218 4219dnl 4220dnl Check to see if -Werror is disabled. 4221dnl 4222dnl --enable-werror/--disable-werror 4223AC_DEFUN([GLIBCXX_ENABLE_WERROR], [ 4224 AC_MSG_CHECKING([for -Werror]) 4225 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror]) 4226 AC_MSG_RESULT($enable_werror) 4227 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes) 4228]) 4229 4230dnl 4231dnl Check whether obsolescent tmpnam is available in <stdio.h>, 4232dnl and define _GLIBCXX_USE_TMPNAM. 4233dnl 4234AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl 4235dnl 4236 AC_LANG_SAVE 4237 AC_LANG_CPLUSPLUS 4238 ac_save_CXXFLAGS="$CXXFLAGS" 4239 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4240dnl 4241 AC_MSG_CHECKING([for tmpnam]) 4242 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl 4243 GCC_TRY_COMPILE_OR_LINK( 4244 [#include <stdio.h>], 4245 [char *tmp = tmpnam(NULL);], 4246 [glibcxx_cv_TMPNAM=yes], 4247 [glibcxx_cv_TMPNAM=no]) 4248 ]) 4249 if test $glibcxx_cv_TMPNAM = yes; then 4250 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.]) 4251 fi 4252 AC_MSG_RESULT($glibcxx_cv_TMPNAM) 4253dnl 4254 CXXFLAGS="$ac_save_CXXFLAGS" 4255 AC_LANG_RESTORE 4256]) 4257 4258dnl 4259dnl Check to see if sys/sdt.h exists and that it is suitable for use. 4260dnl Some versions of sdt.h were not compatible with C++11. 4261dnl 4262AC_DEFUN([GLIBCXX_CHECK_SDT_H], [ 4263 AC_MSG_CHECKING([for suitable sys/sdt.h]) 4264 # Note that this test has to be run with the C language. 4265 # Otherwise, sdt.h will try to include some headers from 4266 # libstdc++ itself. 4267 AC_LANG_SAVE 4268 AC_LANG_C 4269 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [ 4270 # Because we have to run the test in C, we use grep rather 4271 # than the compiler to check for the bug. The bug is that 4272 # were strings without trailing whitespace, causing g++ 4273 # to look for operator"". The pattern searches for the fixed 4274 # output. 4275 AC_EGREP_CPP([ \",\" ], [ 4276 #include <sys/sdt.h> 4277 int f() { STAP_PROBE(hi, bob); } 4278 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no]) 4279 ]) 4280 AC_LANG_RESTORE 4281 if test $glibcxx_cv_sys_sdt_h = yes; then 4282 AC_DEFINE(HAVE_SYS_SDT_H, 1, 4283 [Define to 1 if you have a suitable <sys/sdt.h> header file]) 4284 fi 4285 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h) 4286]) 4287 4288dnl 4289dnl Control whether the library should define symbols for old and new ABIs. 4290dnl This affects definitions of strings, stringstreams and locale facets. 4291dnl 4292dnl --disable-libstdcxx-dual-abi will use old ABI for all types. 4293dnl 4294dnl Defines: 4295dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0) 4296dnl 4297AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [ 4298 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string]) 4299 if test x$enable_symvers = xgnu-versioned-namespace; then 4300 # gnu-versioned-namespace is incompatible with the dual ABI. 4301 enable_libstdcxx_dual_abi="no" 4302 fi 4303 if test x"$enable_libstdcxx_dual_abi" != xyes; then 4304 AC_MSG_NOTICE([dual ABI is disabled]) 4305 default_libstdcxx_abi="gcc4-compatible" 4306 fi 4307 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes) 4308]) 4309 4310dnl 4311dnl Check to see which ABI should be enabled by default. 4312dnl 4313dnl --with-default-libstdcxx-abi={gcc4-compatible,new} 4314dnl 4315dnl Defines: 4316dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0) 4317dnl 4318AC_DEFUN([GLIBCXX_DEFAULT_ABI], [ 4319 if test x$enable_libstdcxx_dual_abi = xyes; then 4320 AC_MSG_CHECKING([for default std::string ABI to use]) 4321 AC_ARG_WITH([default-libstdcxx-abi], 4322 AS_HELP_STRING([--with-default-libstdcxx-abi], 4323 [set the std::string ABI to use by default]), 4324 [case "$withval" in 4325 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;; 4326 new|cxx11) default_libstdcxx_abi="new" ;; 4327 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;; 4328 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;; 4329 esac 4330 ], 4331 [default_libstdcxx_abi="new"]) 4332 AC_MSG_RESULT(${default_libstdcxx_abi}) 4333 fi 4334 if test $default_libstdcxx_abi = "new"; then 4335 glibcxx_cxx11_abi=1 4336 glibcxx_cxx98_abi=0 4337 else 4338 glibcxx_cxx11_abi=0 4339 glibcxx_cxx98_abi=1 4340 fi 4341 AC_SUBST(glibcxx_cxx98_abi) 4342 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1) 4343]) 4344 4345dnl 4346dnl Check to see whether to build libstdc++fs.a 4347dnl 4348dnl --enable-libstdcxx-filesystem-ts 4349dnl 4350AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [ 4351 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,, 4352 [turns on ISO/IEC TS 18822 support], 4353 [permit yes|no|auto]) 4354 4355 AC_MSG_CHECKING([whether to build Filesystem TS support]) 4356 if test x"$ac_cv_header_dirent_h" != x"yes"; then 4357 enable_libstdcxx_filesystem_ts=no 4358 fi 4359 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then 4360 case "${target_os}" in 4361 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*) 4362 enable_libstdcxx_filesystem_ts=yes 4363 ;; 4364 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) 4365 enable_libstdcxx_filesystem_ts=yes 4366 ;; 4367 rtems*) 4368 enable_libstdcxx_filesystem_ts=yes 4369 ;; 4370 solaris*) 4371 enable_libstdcxx_filesystem_ts=yes 4372 ;; 4373 *) 4374 enable_libstdcxx_filesystem_ts=no 4375 ;; 4376 esac 4377 fi 4378 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts) 4379 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes) 4380]) 4381 4382dnl 4383dnl Check whether the library calls required by the Filesystem TS are present. 4384dnl Defines: 4385dnl HAVE_STRUCT_DIRENT_D_TYPE 4386dnl _GLIBCXX_USE_REALPATH 4387dnl _GLIBCXX_USE_UTIMENSAT 4388dnl _GLIBCXX_USE_ST_MTIM 4389dnl _GLIBCXX_USE_FCHMOD 4390dnl _GLIBCXX_USE_FCHMODAT 4391dnl _GLIBCXX_USE_SENDFILE 4392dnl HAVE_LINK 4393dnl HAVE_READLINK 4394dnl HAVE_SYMLINK 4395dnl 4396AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl 4397dnl 4398 if test $enable_libstdcxx_filesystem_ts = yes; then 4399 AC_LANG_SAVE 4400 AC_LANG_CPLUSPLUS 4401 ac_save_CXXFLAGS="$CXXFLAGS" 4402 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4403dnl 4404 AC_MSG_CHECKING([for struct dirent.d_type]) 4405 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl 4406 GCC_TRY_COMPILE_OR_LINK( 4407 [#include <dirent.h>], 4408 [ 4409 struct dirent d; 4410 if (sizeof d.d_type) return 0; 4411 ], 4412 [glibcxx_cv_dirent_d_type=yes], 4413 [glibcxx_cv_dirent_d_type=no]) 4414 ]) 4415 if test $glibcxx_cv_dirent_d_type = yes; then 4416 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.]) 4417 fi 4418 AC_MSG_RESULT($glibcxx_cv_dirent_d_type) 4419dnl 4420 AC_MSG_CHECKING([for realpath]) 4421 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl 4422 GCC_TRY_COMPILE_OR_LINK( 4423 [ 4424 #include <limits.h> 4425 #include <stdlib.h> 4426 #include <unistd.h> 4427 ], 4428 [ 4429 #if _XOPEN_VERSION < 500 4430 #error 4431 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX) 4432 char *tmp = realpath((const char*)NULL, (char*)NULL); 4433 #else 4434 #error 4435 #endif 4436 ], 4437 [glibcxx_cv_realpath=yes], 4438 [glibcxx_cv_realpath=no]) 4439 ]) 4440 if test $glibcxx_cv_realpath = yes; then 4441 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.]) 4442 fi 4443 AC_MSG_RESULT($glibcxx_cv_realpath) 4444dnl 4445 AC_MSG_CHECKING([for utimensat]) 4446 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl 4447 GCC_TRY_COMPILE_OR_LINK( 4448 [ 4449 #include <fcntl.h> 4450 #include <sys/stat.h> 4451 ], 4452 [ 4453 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } }; 4454 int i = utimensat(AT_FDCWD, "path", ts, 0); 4455 ], 4456 [glibcxx_cv_utimensat=yes], 4457 [glibcxx_cv_utimensat=no]) 4458 ]) 4459 if test $glibcxx_cv_utimensat = yes; then 4460 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.]) 4461 fi 4462 AC_MSG_RESULT($glibcxx_cv_utimensat) 4463dnl 4464 AC_MSG_CHECKING([for utime]) 4465 AC_CACHE_VAL(glibcxx_cv_utime, [dnl 4466 GCC_TRY_COMPILE_OR_LINK( 4467 [ 4468 #include <utime.h> 4469 ], 4470 [ 4471 struct utimbuf t = { 1, 1 }; 4472 int i = utime("path", &t); 4473 ], 4474 [glibcxx_cv_utime=yes], 4475 [glibcxx_cv_utime=no]) 4476 ]) 4477 if test $glibcxx_cv_utime = yes; then 4478 AC_DEFINE(_GLIBCXX_USE_UTIME, 1, [Define if utime is available in <utime.h>.]) 4479 fi 4480 AC_MSG_RESULT($glibcxx_cv_utime) 4481dnl 4482 AC_MSG_CHECKING([for lstat]) 4483 AC_CACHE_VAL(glibcxx_cv_lstat, [dnl 4484 GCC_TRY_COMPILE_OR_LINK( 4485 [ #include <sys/stat.h> ], 4486 [ 4487 struct stat st; 4488 int i = lstat("path", &st); 4489 ], 4490 [glibcxx_cv_lstat=yes], 4491 [glibcxx_cv_lstat=no]) 4492 ]) 4493 if test $glibcxx_cv_lstat = yes; then 4494 AC_DEFINE(_GLIBCXX_USE_LSTAT, 1, [Define if lstat is available in <sys/stat.h>.]) 4495 fi 4496 AC_MSG_RESULT($glibcxx_cv_lstat) 4497dnl 4498 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec]) 4499 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl 4500 GCC_TRY_COMPILE_OR_LINK( 4501 [ #include <sys/stat.h> ], 4502 [ 4503 struct stat st; 4504 return st.st_mtim.tv_nsec; 4505 ], 4506 [glibcxx_cv_st_mtim=yes], 4507 [glibcxx_cv_st_mtim=no]) 4508 ]) 4509 if test $glibcxx_cv_st_mtim = yes; then 4510 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.]) 4511 fi 4512 AC_MSG_RESULT($glibcxx_cv_st_mtim) 4513dnl 4514 AC_MSG_CHECKING([for fchmod]) 4515 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl 4516 GCC_TRY_COMPILE_OR_LINK( 4517 [#include <sys/stat.h>], 4518 [fchmod(1, S_IWUSR);], 4519 [glibcxx_cv_fchmod=yes], 4520 [glibcxx_cv_fchmod=no]) 4521 ]) 4522 if test $glibcxx_cv_fchmod = yes; then 4523 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.]) 4524 fi 4525 AC_MSG_RESULT($glibcxx_cv_fchmod) 4526dnl 4527 AC_MSG_CHECKING([for fchmodat]) 4528 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl 4529 GCC_TRY_COMPILE_OR_LINK( 4530 [ 4531 #include <fcntl.h> 4532 #include <sys/stat.h> 4533 ], 4534 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);], 4535 [glibcxx_cv_fchmodat=yes], 4536 [glibcxx_cv_fchmodat=no]) 4537 ]) 4538 if test $glibcxx_cv_fchmodat = yes; then 4539 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.]) 4540 fi 4541 AC_MSG_RESULT($glibcxx_cv_fchmodat) 4542dnl 4543 AC_MSG_CHECKING([for sendfile that can copy files]) 4544 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl 4545 case "${target_os}" in 4546 gnu* | linux* | solaris*) 4547 GCC_TRY_COMPILE_OR_LINK( 4548 [#include <sys/sendfile.h>], 4549 [sendfile(1, 2, (off_t*)0, sizeof 1);], 4550 [glibcxx_cv_sendfile=yes], 4551 [glibcxx_cv_sendfile=no]) 4552 ;; 4553 *) 4554 glibcxx_cv_sendfile=no 4555 ;; 4556 esac 4557 ]) 4558 if test $glibcxx_cv_sendfile = yes; then 4559 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.]) 4560 fi 4561 AC_MSG_RESULT($glibcxx_cv_sendfile) 4562dnl 4563 AC_MSG_CHECKING([for link]) 4564 AC_CACHE_VAL(glibcxx_cv_link, [dnl 4565 GCC_TRY_COMPILE_OR_LINK( 4566 [#include <unistd.h>], 4567 [link("", "");], 4568 [glibcxx_cv_link=yes], 4569 [glibcxx_cv_link=no]) 4570 ]) 4571 if test $glibcxx_cv_link = yes; then 4572 AC_DEFINE(HAVE_LINK, 1, [Define if link is available in <unistd.h>.]) 4573 fi 4574 AC_MSG_RESULT($glibcxx_cv_link) 4575dnl 4576 AC_MSG_CHECKING([for readlink]) 4577 AC_CACHE_VAL(glibcxx_cv_readlink, [dnl 4578 GCC_TRY_COMPILE_OR_LINK( 4579 [#include <unistd.h>], 4580 [char buf[32]; readlink("", buf, sizeof(buf));], 4581 [glibcxx_cv_readlink=yes], 4582 [glibcxx_cv_readlink=no]) 4583 ]) 4584 if test $glibcxx_cv_readlink = yes; then 4585 AC_DEFINE(HAVE_READLINK, 1, [Define if readlink is available in <unistd.h>.]) 4586 fi 4587 AC_MSG_RESULT($glibcxx_cv_readlink) 4588dnl 4589 AC_MSG_CHECKING([for symlink]) 4590 AC_CACHE_VAL(glibcxx_cv_symlink, [dnl 4591 GCC_TRY_COMPILE_OR_LINK( 4592 [#include <unistd.h>], 4593 [symlink("", "");], 4594 [glibcxx_cv_symlink=yes], 4595 [glibcxx_cv_symlink=no]) 4596 ]) 4597 if test $glibcxx_cv_symlink = yes; then 4598 AC_DEFINE(HAVE_SYMLINK, 1, [Define if symlink is available in <unistd.h>.]) 4599 fi 4600 AC_MSG_RESULT($glibcxx_cv_symlink) 4601dnl 4602 AC_MSG_CHECKING([for truncate]) 4603 AC_CACHE_VAL(glibcxx_cv_truncate, [dnl 4604 GCC_TRY_COMPILE_OR_LINK( 4605 [#include <unistd.h>], 4606 [truncate("", 99);], 4607 [glibcxx_cv_truncate=yes], 4608 [glibcxx_cv_truncate=no]) 4609 ]) 4610 if test $glibcxx_cv_truncate = yes; then 4611 AC_DEFINE(HAVE_TRUNCATE, 1, [Define if truncate is available in <unistd.h>.]) 4612 fi 4613 AC_MSG_RESULT($glibcxx_cv_truncate) 4614dnl 4615 CXXFLAGS="$ac_save_CXXFLAGS" 4616 AC_LANG_RESTORE 4617 fi 4618]) 4619 4620dnl 4621dnl Check how size_t is mangled. Copied from libitm. 4622dnl 4623AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [ 4624 AC_CACHE_CHECK([how size_t is mangled], 4625 glibcxx_cv_size_t_mangling, [ 4626 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;], 4627 [glibcxx_cv_size_t_mangling=m], [ 4628 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;], 4629 [glibcxx_cv_size_t_mangling=j], [ 4630 AC_TRY_COMPILE([], 4631 [extern __SIZE_TYPE__ x; extern unsigned long long x;], 4632 [glibcxx_cv_size_t_mangling=y], [ 4633 AC_TRY_COMPILE([], 4634 [extern __SIZE_TYPE__ x; extern unsigned short x;], 4635 [glibcxx_cv_size_t_mangling=t], [ 4636 AC_TRY_COMPILE([], 4637 [extern __SIZE_TYPE__ x; extern __int20 unsigned x;], 4638 [glibcxx_cv_size_t_mangling=u6uint20], 4639 [glibcxx_cv_size_t_mangling=x]) 4640 ]) 4641 ]) 4642 ]) 4643 ]) 4644 ]) 4645 if test $glibcxx_cv_size_t_mangling = x; then 4646 AC_MSG_ERROR([Unknown underlying type for size_t]) 4647 fi 4648 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling], 4649 [Define to the letter to which size_t is mangled.]) 4650]) 4651 4652dnl 4653dnl Determine whether std::exception_ptr symbols should be exported with 4654dnl the symbol versions from GCC 4.6.0 or GCC 7.1.0, depending on which 4655dnl release first added support for std::exception_ptr. Originally it was 4656dnl only supported for targets with always-lock-free atomics for int, but 4657dnl since GCC 7.1 it is supported for all targets. 4658dnl 4659AC_DEFUN([GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER], [ 4660 if test $enable_symvers != no; then 4661 AC_MSG_CHECKING([for first version to support std::exception_ptr]) 4662 case ${target} in 4663 aarch64-*-* | alpha-*-* | hppa*-*-* | i?86-*-* | x86_64-*-* | \ 4664 m68k-*-* | powerpc*-*-* | s390*-*-* | *-*-solaris* ) 4665 ac_exception_ptr_since_gcc46=yes 4666 ;; 4667 *) 4668 # If the value of this macro changes then we will need to hardcode 4669 # yes/no here for additional targets based on the original value. 4670 AC_TRY_COMPILE([], [ 4671 #if __GCC_ATOMIC_INT_LOCK_FREE <= 1 4672 # error atomic int not always lock free 4673 #endif 4674 ], 4675 [ac_exception_ptr_since_gcc46=yes], 4676 [ac_exception_ptr_since_gcc46=no]) 4677 ;; 4678 esac 4679 if test x"$ac_exception_ptr_since_gcc46" = x"yes" ; then 4680 AC_DEFINE(HAVE_EXCEPTION_PTR_SINCE_GCC46, 1, 4681 [Define to 1 if GCC 4.6 supported std::exception_ptr for the target]) 4682 AC_MSG_RESULT([4.6.0]) 4683 else 4684 AC_MSG_RESULT([7.1.0]) 4685 fi 4686 fi 4687]) 4688 4689# Macros from the top-level gcc directory. 4690m4_include([../config/gc++filt.m4]) 4691m4_include([../config/tls.m4]) 4692m4_include([../config/gthr.m4]) 4693m4_include([../config/cet.m4]) 4694