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 $host. 32dnl 33dnl Sets: 34dnl SUBDIRS 35dnl Substs: 36dnl glibcxx_builddir (absolute path) 37dnl glibcxx_srcdir (absolute path) 38dnl toplevel_builddir (absolute path) 39dnl toplevel_srcdir (absolute path) 40dnl with_cross_host 41dnl with_newlib 42dnl with_target_subdir 43dnl plus 44dnl - the variables in GLIBCXX_CHECK_HOST / configure.host 45dnl - default settings for all AM_CONFITIONAL test variables 46dnl - lots of tools, like CC and CXX 47dnl 48AC_DEFUN([GLIBCXX_CONFIGURE], [ 49 # Keep these sync'd with the list in Makefile.am. The first provides an 50 # expandable list at autoconf time; the second provides an expandable list 51 # (i.e., shell variable) at configure time. 52 m4_define([glibcxx_SUBDIRS],[include libsupc++ python src src/c++98 src/c++11 doc testsuite]) 53 SUBDIRS='glibcxx_SUBDIRS' 54 55 # These need to be absolute paths, yet at the same time need to 56 # canonicalize only relative paths, because then amd will not unmount 57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd. 58 glibcxx_builddir=`${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 maintainer-mode bits. 144 if test x"$USE_MAINTAINER_MODE" = xno; then 145 WERROR='' 146 else 147 WERROR='-Werror' 148 fi 149 150 # Check for -ffunction-sections -fdata-sections 151 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections]) 152 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections' 153 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no]) 154 if test "$ac_test_CXXFLAGS" = set; then 155 CXXFLAGS="$ac_save_CXXFLAGS" 156 else 157 # this is the suspicious part 158 CXXFLAGS='' 159 fi 160 if test x"$ac_fdsections" = x"yes"; then 161 SECTION_FLAGS='-ffunction-sections -fdata-sections' 162 fi 163 AC_MSG_RESULT($ac_fdsections) 164 165 AC_LANG_RESTORE 166 AC_SUBST(WERROR) 167 AC_SUBST(SECTION_FLAGS) 168]) 169 170 171dnl 172dnl Check if the assembler used supports disabling generation of hardware 173dnl capabilities. This is only supported by Sun as at the moment. 174dnl 175dnl Defines: 176dnl HWCAP_FLAGS='-Wa,-nH' if possible. 177dnl 178AC_DEFUN([GLIBCXX_CHECK_ASSEMBLER_HWCAP], [ 179 test -z "$HWCAP_FLAGS" && HWCAP_FLAGS='' 180 181 # Restrict the test to Solaris, other assemblers (e.g. AIX as) have -nH 182 # with a different meaning. 183 case ${target_os} in 184 solaris2*) 185 ac_save_CFLAGS="$CFLAGS" 186 CFLAGS="$CFLAGS -Wa,-nH" 187 188 AC_MSG_CHECKING([for as that supports -Wa,-nH]) 189 AC_TRY_COMPILE([], [return 0;], [ac_hwcap_flags=yes],[ac_hwcap_flags=no]) 190 if test "$ac_hwcap_flags" = "yes"; then 191 HWCAP_FLAGS="-Wa,-nH $HWCAP_FLAGS" 192 fi 193 AC_MSG_RESULT($ac_hwcap_flags) 194 195 CFLAGS="$ac_save_CFLAGS" 196 ;; 197 esac 198 199 AC_SUBST(HWCAP_FLAGS) 200]) 201 202 203dnl 204dnl If GNU ld is in use, check to see if tricky linker opts can be used. If 205dnl the native linker is in use, all variables will be defined to something 206dnl safe (like an empty string). 207dnl 208dnl Defines: 209dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible 210dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible 211dnl LD (as a side effect of testing) 212dnl Sets: 213dnl with_gnu_ld 214dnl glibcxx_ld_is_gold (set to "no" or "yes") 215dnl glibcxx_gnu_ld_version (possibly) 216dnl 217dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will 218dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems. 219dnl 220AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [ 221 # If we're not using GNU ld, then there's no point in even trying these 222 # tests. Check for that first. We should have already tested for gld 223 # by now (in libtool), but require it now just to be safe... 224 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS='' 225 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS='' 226 AC_REQUIRE([AC_PROG_LD]) 227 AC_REQUIRE([AC_PROG_AWK]) 228 229 # The name set by libtool depends on the version of libtool. Shame on us 230 # for depending on an impl detail, but c'est la vie. Older versions used 231 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on 232 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually 233 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't 234 # set (hence we're using an older libtool), then set it. 235 if test x${with_gnu_ld+set} != xset; then 236 if test x${ac_cv_prog_gnu_ld+set} != xset; then 237 # We got through "ac_require(ac_prog_ld)" and still not set? Huh? 238 with_gnu_ld=no 239 else 240 with_gnu_ld=$ac_cv_prog_gnu_ld 241 fi 242 fi 243 244 # Start by getting the version number. I think the libtool test already 245 # does some of this, but throws away the result. 246 glibcxx_ld_is_gold=no 247 if test x"$with_gnu_ld" = x"yes"; then 248 AC_MSG_CHECKING([for ld version]) 249 changequote(,) 250 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then 251 glibcxx_ld_is_gold=yes 252 fi 253 ldver=`$LD --version 2>/dev/null | 254 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'` 255 changequote([,]) 256 glibcxx_gnu_ld_version=`echo $ldver | \ 257 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'` 258 AC_MSG_RESULT($glibcxx_gnu_ld_version) 259 fi 260 261 # Set --gc-sections. 262 glibcxx_have_gc_sections=no 263 if test "$glibcxx_ld_is_gold" = "yes"; then 264 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then 265 glibcxx_have_gc_sections=yes 266 fi 267 else 268 glibcxx_gcsections_min_ld=21602 269 if test x"$with_gnu_ld" = x"yes" && 270 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then 271 glibcxx_have_gc_sections=yes 272 fi 273 fi 274 if test "$glibcxx_have_gc_sections" = "yes"; then 275 # Sufficiently young GNU ld it is! Joy and bunny rabbits! 276 # NB: This flag only works reliably after 2.16.1. Configure tests 277 # for this are difficult, so hard wire a value that should work. 278 279 ac_test_CFLAGS="${CFLAGS+set}" 280 ac_save_CFLAGS="$CFLAGS" 281 CFLAGS='-Wl,--gc-sections' 282 283 # Check for -Wl,--gc-sections 284 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections]) 285 AC_TRY_LINK([ int one(void) { return 1; } 286 int two(void) { return 2; } 287 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no]) 288 if test "$ac_gcsections" = "yes"; then 289 rm -f conftest.c 290 touch conftest.c 291 if $CC -c conftest.c; then 292 if $LD --gc-sections -o conftest conftest.o 2>&1 | \ 293 grep "Warning: gc-sections option ignored" > /dev/null; then 294 ac_gcsections=no 295 fi 296 fi 297 rm -f conftest.c conftest.o conftest 298 fi 299 if test "$ac_gcsections" = "yes"; then 300 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS" 301 fi 302 AC_MSG_RESULT($ac_gcsections) 303 304 if test "$ac_test_CFLAGS" = set; then 305 CFLAGS="$ac_save_CFLAGS" 306 else 307 # this is the suspicious part 308 CFLAGS='' 309 fi 310 fi 311 312 # Set -z,relro. 313 # Note this is only for shared objects. 314 ac_ld_relro=no 315 if test x"$with_gnu_ld" = x"yes"; then 316 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro]) 317 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"` 318 if test -n "$cxx_z_relo"; then 319 OPT_LDFLAGS="-Wl,-z,relro" 320 ac_ld_relro=yes 321 fi 322 AC_MSG_RESULT($ac_ld_relro) 323 fi 324 325 # Set linker optimization flags. 326 if test x"$with_gnu_ld" = x"yes"; then 327 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS" 328 fi 329 330 AC_SUBST(SECTION_LDFLAGS) 331 AC_SUBST(OPT_LDFLAGS) 332]) 333 334 335dnl 336dnl Check for headers for, and arguments to, the setrlimit() function. 337dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE. 338dnl 339dnl Defines: 340dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits 341dnl various HAVE_LIMIT_* for individual limit names 342dnl 343AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [ 344 AC_MSG_CHECKING([for RLIMIT_$1]) 345 AC_TRY_COMPILE( 346 [#include <unistd.h> 347 #include <sys/time.h> 348 #include <sys/resource.h> 349 ], 350 [ int f = RLIMIT_$1 ; ], 351 [glibcxx_mresult=1], [glibcxx_mresult=0]) 352 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult, 353 [Only used in build directory testsuite_hooks.h.]) 354 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi 355 AC_MSG_RESULT($res) 356]) 357 358AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [ 359 setrlimit_have_headers=yes 360 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h, 361 [], 362 [setrlimit_have_headers=no]) 363 # If don't have the headers, then we can't run the tests now, and we 364 # won't be seeing any of these during testsuite compilation. 365 if test $setrlimit_have_headers = yes; then 366 # Can't do these in a loop, else the resulting syntax is wrong. 367 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA) 368 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS) 369 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM) 370 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS) 371 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE) 372 373 # Check for rlimit, setrlimit. 374 AC_CACHE_VAL(glibcxx_cv_setrlimit, [ 375 AC_TRY_COMPILE( 376 [#include <unistd.h> 377 #include <sys/time.h> 378 #include <sys/resource.h> 379 ], 380 [struct rlimit r; 381 setrlimit(0, &r);], 382 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no]) 383 ]) 384 fi 385 386 AC_MSG_CHECKING([for testsuite resource limits support]) 387 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then 388 ac_res_limits=yes 389 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1, 390 [Define if using setrlimit to set resource limits during 391 "make check"]) 392 else 393 ac_res_limits=no 394 fi 395 AC_MSG_RESULT($ac_res_limits) 396]) 397 398 399dnl 400dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>. 401dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately. 402dnl 403AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [ 404 405 AC_LANG_SAVE 406 AC_LANG_CPLUSPLUS 407 ac_save_CXXFLAGS="$CXXFLAGS" 408 CXXFLAGS="$CXXFLAGS -fno-exceptions" 409 410 AC_MSG_CHECKING([for S_ISREG or S_IFREG]) 411 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [ 412 GCC_TRY_COMPILE_OR_LINK( 413 [#include <sys/stat.h>], 414 [struct stat buffer; 415 fstat(0, &buffer); 416 S_ISREG(buffer.st_mode);], 417 [glibcxx_cv_S_ISREG=yes], 418 [glibcxx_cv_S_ISREG=no]) 419 ]) 420 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [ 421 GCC_TRY_COMPILE_OR_LINK( 422 [#include <sys/stat.h>], 423 [struct stat buffer; 424 fstat(0, &buffer); 425 S_IFREG & buffer.st_mode;], 426 [glibcxx_cv_S_IFREG=yes], 427 [glibcxx_cv_S_IFREG=no]) 428 ]) 429 res=no 430 if test $glibcxx_cv_S_ISREG = yes; then 431 AC_DEFINE(HAVE_S_ISREG, 1, 432 [Define if S_IFREG is available in <sys/stat.h>.]) 433 res=S_ISREG 434 elif test $glibcxx_cv_S_IFREG = yes; then 435 AC_DEFINE(HAVE_S_IFREG, 1, 436 [Define if S_IFREG is available in <sys/stat.h>.]) 437 res=S_IFREG 438 fi 439 AC_MSG_RESULT($res) 440 441 CXXFLAGS="$ac_save_CXXFLAGS" 442 AC_LANG_RESTORE 443]) 444 445 446dnl 447dnl Check whether poll is available in <poll.h>, and define HAVE_POLL. 448dnl 449AC_DEFUN([GLIBCXX_CHECK_POLL], [ 450 451 AC_LANG_SAVE 452 AC_LANG_CPLUSPLUS 453 ac_save_CXXFLAGS="$CXXFLAGS" 454 CXXFLAGS="$CXXFLAGS -fno-exceptions" 455 456 AC_MSG_CHECKING([for poll]) 457 AC_CACHE_VAL(glibcxx_cv_POLL, [ 458 GCC_TRY_COMPILE_OR_LINK( 459 [#include <poll.h>], 460 [struct pollfd pfd[1]; 461 pfd[0].events = POLLIN; 462 poll(pfd, 1, 0);], 463 [glibcxx_cv_POLL=yes], 464 [glibcxx_cv_POLL=no]) 465 ]) 466 if test $glibcxx_cv_POLL = yes; then 467 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.]) 468 fi 469 AC_MSG_RESULT($glibcxx_cv_POLL) 470 471 CXXFLAGS="$ac_save_CXXFLAGS" 472 AC_LANG_RESTORE 473]) 474 475 476dnl 477dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV. 478dnl 479AC_DEFUN([GLIBCXX_CHECK_WRITEV], [ 480 481 AC_LANG_SAVE 482 AC_LANG_CPLUSPLUS 483 ac_save_CXXFLAGS="$CXXFLAGS" 484 CXXFLAGS="$CXXFLAGS -fno-exceptions" 485 486 AC_MSG_CHECKING([for writev]) 487 AC_CACHE_VAL(glibcxx_cv_WRITEV, [ 488 GCC_TRY_COMPILE_OR_LINK( 489 [#include <sys/uio.h>], 490 [struct iovec iov[2]; 491 writev(0, iov, 0);], 492 [glibcxx_cv_WRITEV=yes], 493 [glibcxx_cv_WRITEV=no]) 494 ]) 495 if test $glibcxx_cv_WRITEV = yes; then 496 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.]) 497 fi 498 AC_MSG_RESULT($glibcxx_cv_WRITEV) 499 500 CXXFLAGS="$ac_save_CXXFLAGS" 501 AC_LANG_RESTORE 502]) 503 504 505dnl 506dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T. 507dnl Also check whether int64_t is actually a typedef to long or long long. 508dnl 509AC_DEFUN([GLIBCXX_CHECK_INT64_T], [ 510 511 AC_LANG_SAVE 512 AC_LANG_CPLUSPLUS 513 514 AC_MSG_CHECKING([for int64_t]) 515 AC_CACHE_VAL(glibcxx_cv_INT64_T, [ 516 AC_TRY_COMPILE( 517 [#include <stdint.h>], 518 [int64_t var;], 519 [glibcxx_cv_INT64_T=yes], 520 [glibcxx_cv_INT64_T=no]) 521 ]) 522 523 if test $glibcxx_cv_INT64_T = yes; then 524 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.]) 525 AC_MSG_RESULT($glibcxx_cv_INT64_T) 526 527 AC_MSG_CHECKING([for int64_t as long]) 528 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [ 529 AC_TRY_COMPILE( 530 [#include <stdint.h> 531 template<typename, typename> struct same { enum { value = -1 }; }; 532 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; }; 533 int array[same<int64_t, long>::value];], [], 534 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no]) 535 ]) 536 537 if test $glibcxx_cv_int64_t_long = yes; then 538 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.]) 539 AC_MSG_RESULT($glibcxx_cv_int64_t_long) 540 fi 541 542 AC_MSG_CHECKING([for int64_t as long long]) 543 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [ 544 AC_TRY_COMPILE( 545 [#include <stdint.h> 546 template<typename, typename> struct same { enum { value = -1 }; }; 547 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; }; 548 int array[same<int64_t, long long>::value];], [], 549 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no]) 550 ]) 551 552 if test $glibcxx_cv_int64_t_long_long = yes; then 553 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.]) 554 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long) 555 fi 556 fi 557 558 AC_LANG_RESTORE 559]) 560 561 562dnl 563dnl Check whether LFS support is available. 564dnl 565AC_DEFUN([GLIBCXX_CHECK_LFS], [ 566 AC_LANG_SAVE 567 AC_LANG_CPLUSPLUS 568 ac_save_CXXFLAGS="$CXXFLAGS" 569 CXXFLAGS="$CXXFLAGS -fno-exceptions" 570 AC_MSG_CHECKING([for LFS support]) 571 AC_CACHE_VAL(glibcxx_cv_LFS, [ 572 GCC_TRY_COMPILE_OR_LINK( 573 [#include <unistd.h> 574 #include <stdio.h> 575 #include <sys/stat.h> 576 ], 577 [FILE* fp; 578 fopen64("t", "w"); 579 fseeko64(fp, 0, SEEK_CUR); 580 ftello64(fp); 581 lseek64(1, 0, SEEK_CUR); 582 struct stat64 buf; 583 fstat64(1, &buf);], 584 [glibcxx_cv_LFS=yes], 585 [glibcxx_cv_LFS=no]) 586 ]) 587 if test $glibcxx_cv_LFS = yes; then 588 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.]) 589 fi 590 AC_MSG_RESULT($glibcxx_cv_LFS) 591 CXXFLAGS="$ac_save_CXXFLAGS" 592 AC_LANG_RESTORE 593]) 594 595 596dnl 597dnl Check for whether a fully dynamic basic_string implementation should 598dnl be turned on, that does not put empty objects in per-process static 599dnl memory (mostly useful together with shared memory allocators, see PR 600dnl libstdc++/16612 for details). 601dnl 602dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1 603dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0 604dnl otherwise undefined 605dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)] 606dnl Where DEFAULT is either `yes' or `no'. 607dnl 608AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [ 609 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory]) 610 if test $enable_fully_dynamic_string = yes; then 611 enable_fully_dynamic_string_def=1 612 else 613 enable_fully_dynamic_string_def=0 614 fi 615 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}], 616 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults]) 617]) 618 619 620dnl 621dnl Does any necessary configuration of the testsuite directory. Generates 622dnl the testsuite_hooks.h header. 623dnl 624dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this. 625dnl 626dnl Sets: 627dnl enable_abi_check 628dnl GLIBCXX_TEST_WCHAR_T 629dnl GLIBCXX_TEST_THREAD 630dnl Substs: 631dnl baseline_dir 632dnl baseline_subdir_switch 633dnl 634AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [ 635 if $GLIBCXX_IS_NATIVE ; then 636 # Do checks for resource limit functions. 637 GLIBCXX_CHECK_SETRLIMIT 638 639 # Look for setenv, so that extended locale tests can be performed. 640 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv) 641 fi 642 643 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes && 644 test $enable_symvers != no; then 645 case "$host" in 646 *-*-cygwin*) 647 enable_abi_check=no ;; 648 *) 649 enable_abi_check=yes ;; 650 esac 651 else 652 # Only build this as native, since automake does not understand 653 # CXX_FOR_BUILD. 654 enable_abi_check=no 655 fi 656 657 # Export file names for ABI checking. 658 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}" 659 AC_SUBST(baseline_dir) 660 baseline_subdir_switch="$abi_baseline_subdir_switch" 661 AC_SUBST(baseline_subdir_switch) 662]) 663 664 665dnl 666dnl Does any necessary configuration for docbook in the docs directory. 667dnl 668dnl XSLTPROC must be set before this 669dnl 670dnl Sets: 671dnl glibcxx_stylesheets 672dnl Substs: 673dnl XSL_STYLE_DIR 674dnl 675AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [ 676 677AC_MSG_CHECKING([for docbook stylesheets for documentation creation]) 678glibcxx_stylesheets=no 679if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude http://docbook.sourceforge.net/release/xsl-ns/current/xhtml-1_1/docbook.xsl - 2>/dev/null; then 680 glibcxx_stylesheets=yes 681fi 682AC_MSG_RESULT($glibcxx_stylesheets) 683 684AC_MSG_CHECKING([for local stylesheet directory]) 685glibcxx_local_stylesheets=no 686if test x"$glibcxx_stylesheets" = x"yes"; then 687 if test -d /usr/share/sgml/docbook/xsl-ns-stylesheets; then 688 glibcxx_local_stylesheets=yes 689 XSL_STYLE_DIR=/usr/share/sgml/docbook/xsl-ns-stylesheets 690 fi 691 if test -d /usr/share/xml/docbook/stylesheet/docbook-xsl-ns; then 692 glibcxx_local_stylesheets=yes 693 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/docbook-xsl-ns 694 fi 695 if test -d /usr/share/xml/docbook/stylesheet/nwalsh5/current; then 696 glibcxx_local_stylesheets=yes 697 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/nwalsh5/current 698 fi 699fi 700AC_MSG_RESULT($glibcxx_local_stylesheets) 701 702if test x"$glibcxx_local_stylesheets" = x"yes"; then 703 AC_SUBST(XSL_STYLE_DIR) 704 AC_MSG_NOTICE($XSL_STYLE_DIR) 705else 706 glibcxx_stylesheets=no 707fi 708 709# Check for epub3 dependencies. 710AC_MSG_CHECKING([for epub3 stylesheets for documentation creation]) 711glibcxx_epub_stylesheets=no 712if test x"$glibcxx_local_stylesheets" = x"yes"; then 713 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then 714 glibcxx_epub_stylesheets=yes 715 fi 716fi 717AC_MSG_RESULT($glibcxx_epub_stylesheets) 718AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes") 719 720]) 721 722 723dnl 724dnl Set up *_INCLUDES variables for all sundry Makefile.am's. 725dnl 726dnl Substs: 727dnl GLIBCXX_INCLUDES 728dnl TOPLEVEL_INCLUDES 729dnl 730AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [ 731 # Used for every C++ compile we perform. 732 GLIBCXX_INCLUDES="\ 733-I$glibcxx_builddir/include/$host_alias \ 734-I$glibcxx_builddir/include \ 735-I$glibcxx_srcdir/libsupc++" 736 737 # For Canadian crosses, pick this up too. 738 if test $CANADIAN = yes; then 739 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}" 740 fi 741 742 # Stuff in the actual top level. Currently only used by libsupc++ to 743 # get unwind* headers from the libgcc dir. 744 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include' 745 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc' 746 747 # Now, export this to all the little Makefiles.... 748 AC_SUBST(GLIBCXX_INCLUDES) 749 AC_SUBST(TOPLEVEL_INCLUDES) 750]) 751 752 753dnl 754dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's. 755dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.) 756dnl 757dnl Substs: 758dnl OPTIMIZE_CXXFLAGS 759dnl WARN_FLAGS 760dnl 761AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [ 762 # Optimization flags that are probably a good idea for thrill-seekers. Just 763 # uncomment the lines below and make, everything else is ready to go... 764 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host. 765 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc 766 AC_SUBST(OPTIMIZE_CXXFLAGS) 767 768 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi' 769 AC_SUBST(WARN_FLAGS) 770]) 771 772 773dnl 774dnl All installation directory information is determined here. 775dnl 776dnl Substs: 777dnl gxx_install_dir 778dnl glibcxx_prefixdir 779dnl glibcxx_toolexecdir 780dnl glibcxx_toolexeclibdir 781dnl 782dnl Assumes cross_compiling bits already done, and with_cross_host in 783dnl particular. 784dnl 785dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir. 786dnl config/gxx-include-dir.m4 must be kept consistant with this as well. 787AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [ 788 glibcxx_toolexecdir=no 789 glibcxx_toolexeclibdir=no 790 glibcxx_prefixdir=$prefix 791 792 AC_MSG_CHECKING([for gxx-include-dir]) 793 AC_ARG_WITH([gxx-include-dir], 794 AC_HELP_STRING([--with-gxx-include-dir=DIR], 795 [installation directory for include files]), 796 [case "$withval" in 797 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;; 798 no) gxx_include_dir=no ;; 799 *) gxx_include_dir=$withval ;; 800 esac], 801 [gxx_include_dir=no]) 802 AC_MSG_RESULT($gxx_include_dir) 803 804 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 805 AC_ARG_ENABLE([version-specific-runtime-libs], 806 AC_HELP_STRING([--enable-version-specific-runtime-libs], 807 [Specify that runtime libraries should be installed in a compiler-specific directory]), 808 [case "$enableval" in 809 yes) version_specific_libs=yes ;; 810 no) version_specific_libs=no ;; 811 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; 812 esac], 813 [version_specific_libs=no]) 814 AC_MSG_RESULT($version_specific_libs) 815 816 # Default case for install directory for include files. 817 if test $version_specific_libs = no && test $gxx_include_dir = no; then 818 gxx_include_dir='include/c++/${gcc_version}' 819 if test -n "$with_cross_host" && 820 test x"$with_cross_host" != x"no"; then 821 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir" 822 else 823 gxx_include_dir='${prefix}/'"$gxx_include_dir" 824 fi 825 fi 826 827 # Version-specific runtime libs processing. 828 if test $version_specific_libs = yes; then 829 # Need the gcc compiler version to know where to install libraries 830 # and header files if --enable-version-specific-runtime-libs option 831 # is selected. FIXME: these variables are misnamed, there are 832 # no executables installed in _toolexecdir or _toolexeclibdir. 833 if test x"$gxx_include_dir" = x"no"; then 834 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++' 835 fi 836 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' 837 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)' 838 fi 839 840 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir 841 # Install a library built with a cross compiler in tooldir, not libdir. 842 if test x"$glibcxx_toolexecdir" = x"no"; then 843 if test -n "$with_cross_host" && 844 test x"$with_cross_host" != x"no"; then 845 glibcxx_toolexecdir='${exec_prefix}/${host_alias}' 846 glibcxx_toolexeclibdir='${toolexecdir}/lib' 847 else 848 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}' 849 glibcxx_toolexeclibdir='${libdir}' 850 fi 851 multi_os_directory=`$CXX -print-multi-os-directory` 852 case $multi_os_directory in 853 .) ;; # Avoid trailing /. 854 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;; 855 esac 856 fi 857 858 AC_MSG_CHECKING([for install location]) 859 AC_MSG_RESULT($gxx_include_dir) 860 861 AC_SUBST(glibcxx_prefixdir) 862 AC_SUBST(gxx_include_dir) 863 AC_SUBST(glibcxx_toolexecdir) 864 AC_SUBST(glibcxx_toolexeclibdir) 865]) 866 867 868dnl 869dnl GLIBCXX_ENABLE 870dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING) 871dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c) 872dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER) 873dnl 874dnl See docs/html/17_intro/configury.html#enable for documentation. 875dnl 876m4_define([GLIBCXX_ENABLE],[dnl 877m4_define([_g_switch],[--enable-$1])dnl 878m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl 879 AC_ARG_ENABLE([$1],m4_dquote(_g_help), 880 m4_bmatch([$5], 881 [^permit ], 882 [[ 883 case "$enableval" in 884 m4_bpatsubst([$5],[permit ])) ;; 885 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; 886 dnl Idea for future: generate a URL pointing to 887 dnl "onlinedocs/configopts.html#whatever" 888 esac 889 ]], 890 [^$], 891 [[ 892 case "$enableval" in 893 yes|no) ;; 894 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; 895 esac 896 ]], 897 [[$5]]), 898 [enable_]m4_bpatsubst([$1],-,_)[=][$2]) 899m4_undefine([_g_switch])dnl 900m4_undefine([_g_help])dnl 901]) 902 903 904dnl 905dnl Check for ISO/IEC 9899:1999 "C99" support. 906dnl 907dnl --enable-c99 defines _GLIBCXX_USE_C99 908dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined 909dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)] 910dnl Where DEFAULT is either `yes' or `no'. 911dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'. 912dnl 913AC_DEFUN([GLIBCXX_ENABLE_C99], [ 914 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support]) 915 916 if test x"$enable_c99" = x"yes"; then 917 918 AC_LANG_SAVE 919 AC_LANG_CPLUSPLUS 920 921 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__ 922 # undefined and fake C99 facilities - like pre-standard snprintf - may be 923 # spuriously enabled. 924 # Long term, -std=c++0x could be even better, could manage to explicitely 925 # request C99 facilities to the underlying C headers. 926 ac_save_CXXFLAGS="$CXXFLAGS" 927 CXXFLAGS="$CXXFLAGS -std=c++98" 928 ac_save_LIBS="$LIBS" 929 ac_save_gcc_no_link="$gcc_no_link" 930 931 if test x$gcc_no_link != xyes; then 932 # Use -fno-exceptions to that the C driver can link these tests without 933 # hitting undefined references to personality routines. 934 CXXFLAGS="$CXXFLAGS -fno-exceptions" 935 AC_CHECK_LIB(m, sin, [ 936 LIBS="$LIBS -lm" 937 ], [ 938 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK 939 gcc_no_link=yes 940 ]) 941 fi 942 943 # Check for the existence of <math.h> functions used if C99 is enabled. 944 AC_MSG_CHECKING([for ISO C99 support in <math.h>]) 945 AC_CACHE_VAL(glibcxx_cv_c99_math, [ 946 GCC_TRY_COMPILE_OR_LINK( 947 [#include <math.h> 948 volatile double d1, d2; 949 volatile int i;], 950 [i = fpclassify(d1); 951 i = isfinite(d1); 952 i = isinf(d1); 953 i = isnan(d1); 954 i = isnormal(d1); 955 i = signbit(d1); 956 i = isgreater(d1, d2); 957 i = isgreaterequal(d1, d2); 958 i = isless(d1, d2); 959 i = islessequal(d1, d2); 960 i = islessgreater(d1, d2); 961 i = islessgreater(d1, d2); 962 i = isunordered(d1, d2); 963 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no]) 964 ]) 965 AC_MSG_RESULT($glibcxx_cv_c99_math) 966 if test x"$glibcxx_cv_c99_math" = x"yes"; then 967 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1, 968 [Define if C99 functions or macros in <math.h> should be imported 969 in <cmath> in namespace std.]) 970 fi 971 972 # Check for the existence of <complex.h> complex math functions. 973 # This is necessary even though libstdc++ uses the builtin versions 974 # of these functions, because if the builtin cannot be used, a reference 975 # to the library function is emitted. 976 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no) 977 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 978 glibcxx_cv_c99_complex=no; 979 if test x"$ac_has_complex_h" = x"yes"; then 980 AC_MSG_CHECKING([for ISO C99 support in <complex.h>]) 981 GCC_TRY_COMPILE_OR_LINK( 982 [#include <complex.h> 983 typedef __complex__ float float_type; 984 typedef __complex__ double double_type; 985 typedef __complex__ long double ld_type; 986 volatile float_type tmpf; 987 volatile double_type tmpd; 988 volatile ld_type tmpld; 989 volatile float f; 990 volatile double d; 991 volatile long double ld;], 992 [f = cabsf(tmpf); 993 f = cargf(tmpf); 994 tmpf = ccosf(tmpf); 995 tmpf = ccoshf(tmpf); 996 tmpf = cexpf(tmpf); 997 tmpf = clogf(tmpf); 998 tmpf = csinf(tmpf); 999 tmpf = csinhf(tmpf); 1000 tmpf = csqrtf(tmpf); 1001 tmpf = ctanf(tmpf); 1002 tmpf = ctanhf(tmpf); 1003 tmpf = cpowf(tmpf, tmpf); 1004 tmpf = cprojf(tmpf); 1005 d = cabs(tmpd); 1006 d = carg(tmpd); 1007 tmpd = ccos(tmpd); 1008 tmpd = ccosh(tmpd); 1009 tmpd = cexp(tmpd); 1010 tmpd = clog(tmpd); 1011 tmpd = csin(tmpd); 1012 tmpd = csinh(tmpd); 1013 tmpd = csqrt(tmpd); 1014 tmpd = ctan(tmpd); 1015 tmpd = ctanh(tmpd); 1016 tmpd = cpow(tmpd, tmpd); 1017 tmpd = cproj(tmpd); 1018 ld = cabsl(tmpld); 1019 ld = cargl(tmpld); 1020 tmpld = ccosl(tmpld); 1021 tmpld = ccoshl(tmpld); 1022 tmpld = cexpl(tmpld); 1023 tmpld = clogl(tmpld); 1024 tmpld = csinl(tmpld); 1025 tmpld = csinhl(tmpld); 1026 tmpld = csqrtl(tmpld); 1027 tmpld = ctanl(tmpld); 1028 tmpld = ctanhl(tmpld); 1029 tmpld = cpowl(tmpld, tmpld); 1030 tmpld = cprojl(tmpld); 1031 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no]) 1032 fi 1033 AC_MSG_RESULT($glibcxx_cv_c99_complex) 1034 if test x"$glibcxx_cv_c99_complex" = x"yes"; then 1035 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1, 1036 [Define if C99 functions in <complex.h> should be used in 1037 <complex>. Using compiler builtins for these functions requires 1038 corresponding C99 library functions to be present.]) 1039 fi 1040 1041 # Check for the existence in <stdio.h> of vscanf, et. al. 1042 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>]) 1043 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [ 1044 GCC_TRY_COMPILE_OR_LINK( 1045 [#include <stdio.h> 1046 #include <stdarg.h> 1047 void foo(char* fmt, ...) 1048 { 1049 va_list args; va_start(args, fmt); 1050 vfscanf(stderr, "%i", args); 1051 vscanf("%i", args); 1052 vsnprintf(fmt, 0, "%i", args); 1053 vsscanf(fmt, "%i", args); 1054 }], 1055 [snprintf("12", 0, "%i");], 1056 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no]) 1057 ]) 1058 AC_MSG_RESULT($glibcxx_cv_c99_stdio) 1059 1060 # Check for the existence in <stdlib.h> of lldiv_t, et. al. 1061 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>]) 1062 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [ 1063 GCC_TRY_COMPILE_OR_LINK( 1064 [#include <stdlib.h> 1065 volatile float f; 1066 volatile long double ld; 1067 volatile unsigned long long ll; 1068 lldiv_t mydivt;], 1069 [char* tmp; 1070 f = strtof("gnu", &tmp); 1071 ld = strtold("gnu", &tmp); 1072 ll = strtoll("gnu", &tmp, 10); 1073 ll = strtoull("gnu", &tmp, 10); 1074 ll = llabs(10); 1075 mydivt = lldiv(10,1); 1076 ll = mydivt.quot; 1077 ll = mydivt.rem; 1078 ll = atoll("10"); 1079 _Exit(0); 1080 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no]) 1081 ]) 1082 AC_MSG_RESULT($glibcxx_cv_c99_stdlib) 1083 1084 # Check for the existence in <wchar.h> of wcstold, etc. 1085 glibcxx_cv_c99_wchar=no; 1086 if test x"$ac_has_wchar_h" = xyes && 1087 test x"$ac_has_wctype_h" = xyes; then 1088 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>]) 1089 AC_TRY_COMPILE([#include <wchar.h> 1090 namespace test 1091 { 1092 using ::wcstold; 1093 using ::wcstoll; 1094 using ::wcstoull; 1095 } 1096 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no]) 1097 1098 # Checks for wide character functions that may not be present. 1099 # Injection of these is wrapped with guard macros. 1100 # NB: only put functions here, instead of immediately above, if 1101 # absolutely necessary. 1102 AC_TRY_COMPILE([#include <wchar.h> 1103 namespace test { using ::vfwscanf; } ], [], 1104 [AC_DEFINE(HAVE_VFWSCANF,1, 1105 [Defined if vfwscanf exists.])],[]) 1106 1107 AC_TRY_COMPILE([#include <wchar.h> 1108 namespace test { using ::vswscanf; } ], [], 1109 [AC_DEFINE(HAVE_VSWSCANF,1, 1110 [Defined if vswscanf exists.])],[]) 1111 1112 AC_TRY_COMPILE([#include <wchar.h> 1113 namespace test { using ::vwscanf; } ], [], 1114 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[]) 1115 1116 AC_TRY_COMPILE([#include <wchar.h> 1117 namespace test { using ::wcstof; } ], [], 1118 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[]) 1119 1120 AC_TRY_COMPILE([#include <wctype.h>], 1121 [ wint_t t; int i = iswblank(t);], 1122 [AC_DEFINE(HAVE_ISWBLANK,1, 1123 [Defined if iswblank exists.])],[]) 1124 1125 AC_MSG_RESULT($glibcxx_cv_c99_wchar) 1126 fi 1127 1128 # Option parsed, now set things appropriately. 1129 if test x"$glibcxx_cv_c99_math" = x"no" || 1130 test x"$glibcxx_cv_c99_complex" = x"no" || 1131 test x"$glibcxx_cv_c99_stdio" = x"no" || 1132 test x"$glibcxx_cv_c99_stdlib" = x"no" || 1133 test x"$glibcxx_cv_c99_wchar" = x"no"; then 1134 enable_c99=no; 1135 else 1136 AC_DEFINE(_GLIBCXX_USE_C99, 1, 1137 [Define if C99 functions or macros from <wchar.h>, <math.h>, 1138 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.]) 1139 fi 1140 1141 gcc_no_link="$ac_save_gcc_no_link" 1142 LIBS="$ac_save_LIBS" 1143 CXXFLAGS="$ac_save_CXXFLAGS" 1144 AC_LANG_RESTORE 1145 fi 1146 1147 AC_MSG_CHECKING([for fully enabled ISO C99 support]) 1148 AC_MSG_RESULT($enable_c99) 1149]) 1150 1151 1152dnl 1153dnl Check for clock_gettime, nanosleep and sched_yield, used in the 1154dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this] 1155dnl in the C++11 standard. 1156dnl 1157dnl --enable-libstdcxx-time 1158dnl --enable-libstdcxx-time=yes 1159dnl checks for the availability of monotonic and realtime clocks, 1160dnl nanosleep and sched_yield in libc and libposix4 and, if needed, 1161dnl links in the latter. 1162dnl --enable-libstdcxx-time=rt 1163dnl also searches (and, if needed, links) librt. Note that this is 1164dnl not always desirable because, in glibc, for example, in turn it 1165dnl triggers the linking of libpthread too, which activates locking, 1166dnl a large overhead for single-thread programs. 1167dnl --enable-libstdcxx-time=no 1168dnl --disable-libstdcxx-time 1169dnl disables the checks completely 1170dnl 1171dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX 1172dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test 1173dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in 1174dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD. 1175dnl 1176AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [ 1177 1178 AC_MSG_CHECKING([for clock_gettime, nanosleep and sched_yield]) 1179 GLIBCXX_ENABLE(libstdcxx-time,$1,[[[=KIND]]], 1180 [use KIND for check type], 1181 [permit yes|no|rt]) 1182 1183 AC_LANG_SAVE 1184 AC_LANG_CPLUSPLUS 1185 ac_save_CXXFLAGS="$CXXFLAGS" 1186 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1187 ac_save_LIBS="$LIBS" 1188 1189 ac_has_clock_monotonic=no 1190 ac_has_clock_realtime=no 1191 AC_MSG_RESULT($enable_libstdcxx_time) 1192 1193 if test x"$enable_libstdcxx_time" != x"no"; then 1194 1195 if test x"$enable_libstdcxx_time" = x"rt"; then 1196 AC_SEARCH_LIBS(clock_gettime, [rt posix4]) 1197 AC_SEARCH_LIBS(nanosleep, [rt posix4]) 1198 else 1199 AC_SEARCH_LIBS(clock_gettime, [posix4]) 1200 AC_SEARCH_LIBS(nanosleep, [posix4]) 1201 fi 1202 1203 case "$ac_cv_search_clock_gettime" in 1204 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime 1205 ;; 1206 esac 1207 case "$ac_cv_search_nanosleep" in 1208 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep" 1209 ;; 1210 esac 1211 1212 AC_SEARCH_LIBS(sched_yield, [rt posix4]) 1213 1214 case "$ac_cv_search_sched_yield" in 1215 -lposix4*) 1216 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield" 1217 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1, 1218 [ Defined if sched_yield is available. ]) 1219 ;; 1220 -lrt*) 1221 if test x"$enable_libstdcxx_time" = x"rt"; then 1222 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield" 1223 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1, 1224 [ Defined if sched_yield is available. ]) 1225 fi 1226 ;; 1227 *) 1228 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1, 1229 [ Defined if sched_yield is available. ]) 1230 ;; 1231 esac 1232 1233 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no) 1234 1235 if test x"$ac_has_unistd_h" = x"yes"; then 1236 AC_MSG_CHECKING([for monotonic clock]) 1237 AC_TRY_LINK( 1238 [#include <unistd.h> 1239 #include <time.h> 1240 ], 1241 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) 1242 timespec tp; 1243 #endif 1244 clock_gettime(CLOCK_MONOTONIC, &tp); 1245 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no]) 1246 1247 AC_MSG_RESULT($ac_has_clock_monotonic) 1248 1249 AC_MSG_CHECKING([for realtime clock]) 1250 AC_TRY_LINK( 1251 [#include <unistd.h> 1252 #include <time.h> 1253 ], 1254 [#if _POSIX_TIMERS > 0 1255 timespec tp; 1256 #endif 1257 clock_gettime(CLOCK_REALTIME, &tp); 1258 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no]) 1259 1260 AC_MSG_RESULT($ac_has_clock_realtime) 1261 1262 AC_MSG_CHECKING([for nanosleep]) 1263 AC_TRY_LINK( 1264 [#include <unistd.h> 1265 #include <time.h> 1266 ], 1267 [#if _POSIX_TIMERS > 0 1268 timespec tp; 1269 #endif 1270 nanosleep(&tp, 0); 1271 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no]) 1272 1273 AC_MSG_RESULT($ac_has_nanosleep) 1274 fi 1275 fi 1276 1277 if test x"$ac_has_clock_monotonic" != x"yes"; then 1278 case ${target_os} in 1279 linux*) 1280 AC_MSG_CHECKING([for clock_gettime syscall]) 1281 AC_TRY_COMPILE( 1282 [#include <unistd.h> 1283 #include <time.h> 1284 #include <sys/syscall.h> 1285 ], 1286 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) 1287 timespec tp; 1288 #endif 1289 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp); 1290 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp); 1291 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no]) 1292 AC_MSG_RESULT($ac_has_clock_monotonic_syscall) 1293 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then 1294 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1, 1295 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ]) 1296 ac_has_clock_monotonic=yes 1297 ac_has_clock_realtime=yes 1298 fi;; 1299 esac 1300 fi 1301 1302 if test x"$ac_has_clock_monotonic" = x"yes"; then 1303 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1, 1304 [ Defined if clock_gettime has monotonic clock support. ]) 1305 fi 1306 1307 if test x"$ac_has_clock_realtime" = x"yes"; then 1308 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1, 1309 [ Defined if clock_gettime has realtime clock support. ]) 1310 fi 1311 1312 if test x"$ac_has_nanosleep" = x"yes"; then 1313 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1, 1314 [ Defined if nanosleep is available. ]) 1315 else 1316 AC_MSG_CHECKING([for sleep]) 1317 AC_TRY_COMPILE([#include <unistd.h>], 1318 [sleep(1)], 1319 [ac_has_sleep=yes],[ac_has_sleep=no]) 1320 if test x"$ac_has_sleep" = x"yes"; then 1321 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.]) 1322 fi 1323 AC_MSG_RESULT($ac_has_sleep) 1324 AC_MSG_CHECKING([for usleep]) 1325 AC_TRY_COMPILE([#include <unistd.h>], 1326 [sleep(1); 1327 usleep(100);], 1328 [ac_has_usleep=yes],[ac_has_usleep=no]) 1329 if test x"$ac_has_usleep" = x"yes"; then 1330 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.]) 1331 fi 1332 AC_MSG_RESULT($ac_has_usleep) 1333 fi 1334 1335 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then 1336 AC_MSG_CHECKING([for Sleep]) 1337 AC_TRY_COMPILE([#include <windows.h>], 1338 [Sleep(1)], 1339 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no]) 1340 if test x"$ac_has_win32_sleep" = x"yes"; then 1341 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.]) 1342 fi 1343 AC_MSG_RESULT($ac_has_win32_sleep) 1344 fi 1345 1346 AC_SUBST(GLIBCXX_LIBS) 1347 1348 CXXFLAGS="$ac_save_CXXFLAGS" 1349 LIBS="$ac_save_LIBS" 1350 AC_LANG_RESTORE 1351]) 1352 1353dnl 1354dnl Check for gettimeofday, used in the implementation of 20.11.7 1355dnl [time.clock] in the C++11 standard. 1356dnl 1357AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [ 1358 1359 AC_MSG_CHECKING([for gettimeofday]) 1360 1361 AC_LANG_SAVE 1362 AC_LANG_CPLUSPLUS 1363 ac_save_CXXFLAGS="$CXXFLAGS" 1364 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1365 1366 ac_has_gettimeofday=no; 1367 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no) 1368 if test x"$ac_has_sys_time_h" = x"yes"; then 1369 AC_MSG_CHECKING([for gettimeofday]) 1370 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>], 1371 [timeval tv; gettimeofday(&tv, 0);], 1372 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no]) 1373 1374 AC_MSG_RESULT($ac_has_gettimeofday) 1375 fi 1376 1377 if test x"$ac_has_gettimeofday" = x"yes"; then 1378 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1, 1379 [ Defined if gettimeofday is available. ]) 1380 fi 1381 1382 CXXFLAGS="$ac_save_CXXFLAGS" 1383 AC_LANG_RESTORE 1384]) 1385 1386dnl 1387dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1" 1388dnl facilities in Chapter 8, "C compatibility". 1389dnl 1390AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [ 1391 1392 AC_LANG_SAVE 1393 AC_LANG_CPLUSPLUS 1394 1395 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__ 1396 # undefined and fake C99 facilities may be spuriously enabled. 1397 ac_save_CXXFLAGS="$CXXFLAGS" 1398 CXXFLAGS="$CXXFLAGS -std=c++98" 1399 1400 # Check for the existence of <complex.h> complex math functions used 1401 # by tr1/complex. 1402 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 1403 ac_c99_complex_tr1=no; 1404 if test x"$ac_has_complex_h" = x"yes"; then 1405 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>]) 1406 AC_TRY_COMPILE([#include <complex.h>], 1407 [typedef __complex__ float float_type; float_type tmpf; 1408 cacosf(tmpf); 1409 casinf(tmpf); 1410 catanf(tmpf); 1411 cacoshf(tmpf); 1412 casinhf(tmpf); 1413 catanhf(tmpf); 1414 typedef __complex__ double double_type; double_type tmpd; 1415 cacos(tmpd); 1416 casin(tmpd); 1417 catan(tmpd); 1418 cacosh(tmpd); 1419 casinh(tmpd); 1420 catanh(tmpd); 1421 typedef __complex__ long double ld_type; ld_type tmpld; 1422 cacosl(tmpld); 1423 casinl(tmpld); 1424 catanl(tmpld); 1425 cacoshl(tmpld); 1426 casinhl(tmpld); 1427 catanhl(tmpld); 1428 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no]) 1429 fi 1430 AC_MSG_RESULT($ac_c99_complex_tr1) 1431 if test x"$ac_c99_complex_tr1" = x"yes"; then 1432 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1, 1433 [Define if C99 functions in <complex.h> should be used in 1434 <tr1/complex>. Using compiler builtins for these functions 1435 requires corresponding C99 library functions to be present.]) 1436 fi 1437 1438 # Check for the existence of <ctype.h> functions. 1439 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>]) 1440 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [ 1441 AC_TRY_COMPILE([#include <ctype.h>], 1442 [int ch; 1443 int ret; 1444 ret = isblank(ch); 1445 ],[glibcxx_cv_c99_ctype_tr1=yes], 1446 [glibcxx_cv_c99_ctype_tr1=no]) 1447 ]) 1448 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1) 1449 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then 1450 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1, 1451 [Define if C99 functions in <ctype.h> should be imported in 1452 <tr1/cctype> in namespace std::tr1.]) 1453 fi 1454 1455 # Check for the existence of <fenv.h> functions. 1456 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no) 1457 ac_c99_fenv_tr1=no; 1458 if test x"$ac_has_fenv_h" = x"yes"; then 1459 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>]) 1460 AC_TRY_COMPILE([#include <fenv.h>], 1461 [int except, mode; 1462 fexcept_t* pflag; 1463 fenv_t* penv; 1464 int ret; 1465 ret = feclearexcept(except); 1466 ret = fegetexceptflag(pflag, except); 1467 ret = feraiseexcept(except); 1468 ret = fesetexceptflag(pflag, except); 1469 ret = fetestexcept(except); 1470 ret = fegetround(); 1471 ret = fesetround(mode); 1472 ret = fegetenv(penv); 1473 ret = feholdexcept(penv); 1474 ret = fesetenv(penv); 1475 ret = feupdateenv(penv); 1476 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no]) 1477 fi 1478 AC_MSG_RESULT($ac_c99_fenv_tr1) 1479 if test x"$ac_c99_fenv_tr1" = x"yes"; then 1480 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1, 1481 [Define if C99 functions in <fenv.h> should be imported in 1482 <tr1/cfenv> in namespace std::tr1.]) 1483 fi 1484 1485 # Check for the existence of <stdint.h> types. 1486 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>]) 1487 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [ 1488 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS 1489 #define __STDC_CONSTANT_MACROS 1490 #include <stdint.h>], 1491 [typedef int8_t my_int8_t; 1492 my_int8_t i8 = INT8_MIN; 1493 i8 = INT8_MAX; 1494 typedef int16_t my_int16_t; 1495 my_int16_t i16 = INT16_MIN; 1496 i16 = INT16_MAX; 1497 typedef int32_t my_int32_t; 1498 my_int32_t i32 = INT32_MIN; 1499 i32 = INT32_MAX; 1500 typedef int64_t my_int64_t; 1501 my_int64_t i64 = INT64_MIN; 1502 i64 = INT64_MAX; 1503 typedef int_fast8_t my_int_fast8_t; 1504 my_int_fast8_t if8 = INT_FAST8_MIN; 1505 if8 = INT_FAST8_MAX; 1506 typedef int_fast16_t my_int_fast16_t; 1507 my_int_fast16_t if16 = INT_FAST16_MIN; 1508 if16 = INT_FAST16_MAX; 1509 typedef int_fast32_t my_int_fast32_t; 1510 my_int_fast32_t if32 = INT_FAST32_MIN; 1511 if32 = INT_FAST32_MAX; 1512 typedef int_fast64_t my_int_fast64_t; 1513 my_int_fast64_t if64 = INT_FAST64_MIN; 1514 if64 = INT_FAST64_MAX; 1515 typedef int_least8_t my_int_least8_t; 1516 my_int_least8_t il8 = INT_LEAST8_MIN; 1517 il8 = INT_LEAST8_MAX; 1518 typedef int_least16_t my_int_least16_t; 1519 my_int_least16_t il16 = INT_LEAST16_MIN; 1520 il16 = INT_LEAST16_MAX; 1521 typedef int_least32_t my_int_least32_t; 1522 my_int_least32_t il32 = INT_LEAST32_MIN; 1523 il32 = INT_LEAST32_MAX; 1524 typedef int_least64_t my_int_least64_t; 1525 my_int_least64_t il64 = INT_LEAST64_MIN; 1526 il64 = INT_LEAST64_MAX; 1527 typedef intmax_t my_intmax_t; 1528 my_intmax_t im = INTMAX_MAX; 1529 im = INTMAX_MIN; 1530 typedef intptr_t my_intptr_t; 1531 my_intptr_t ip = INTPTR_MAX; 1532 ip = INTPTR_MIN; 1533 typedef uint8_t my_uint8_t; 1534 my_uint8_t ui8 = UINT8_MAX; 1535 ui8 = UINT8_MAX; 1536 typedef uint16_t my_uint16_t; 1537 my_uint16_t ui16 = UINT16_MAX; 1538 ui16 = UINT16_MAX; 1539 typedef uint32_t my_uint32_t; 1540 my_uint32_t ui32 = UINT32_MAX; 1541 ui32 = UINT32_MAX; 1542 typedef uint64_t my_uint64_t; 1543 my_uint64_t ui64 = UINT64_MAX; 1544 ui64 = UINT64_MAX; 1545 typedef uint_fast8_t my_uint_fast8_t; 1546 my_uint_fast8_t uif8 = UINT_FAST8_MAX; 1547 uif8 = UINT_FAST8_MAX; 1548 typedef uint_fast16_t my_uint_fast16_t; 1549 my_uint_fast16_t uif16 = UINT_FAST16_MAX; 1550 uif16 = UINT_FAST16_MAX; 1551 typedef uint_fast32_t my_uint_fast32_t; 1552 my_uint_fast32_t uif32 = UINT_FAST32_MAX; 1553 uif32 = UINT_FAST32_MAX; 1554 typedef uint_fast64_t my_uint_fast64_t; 1555 my_uint_fast64_t uif64 = UINT_FAST64_MAX; 1556 uif64 = UINT_FAST64_MAX; 1557 typedef uint_least8_t my_uint_least8_t; 1558 my_uint_least8_t uil8 = UINT_LEAST8_MAX; 1559 uil8 = UINT_LEAST8_MAX; 1560 typedef uint_least16_t my_uint_least16_t; 1561 my_uint_least16_t uil16 = UINT_LEAST16_MAX; 1562 uil16 = UINT_LEAST16_MAX; 1563 typedef uint_least32_t my_uint_least32_t; 1564 my_uint_least32_t uil32 = UINT_LEAST32_MAX; 1565 uil32 = UINT_LEAST32_MAX; 1566 typedef uint_least64_t my_uint_least64_t; 1567 my_uint_least64_t uil64 = UINT_LEAST64_MAX; 1568 uil64 = UINT_LEAST64_MAX; 1569 typedef uintmax_t my_uintmax_t; 1570 my_uintmax_t uim = UINTMAX_MAX; 1571 uim = UINTMAX_MAX; 1572 typedef uintptr_t my_uintptr_t; 1573 my_uintptr_t uip = UINTPTR_MAX; 1574 uip = UINTPTR_MAX; 1575 ],[glibcxx_cv_c99_stdint_tr1=yes], 1576 [glibcxx_cv_c99_stdint_tr1=no]) 1577 ]) 1578 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1) 1579 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 1580 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1, 1581 [Define if C99 types in <stdint.h> should be imported in 1582 <tr1/cstdint> in namespace std::tr1.]) 1583 fi 1584 1585 # Check for the existence of <math.h> functions. 1586 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>]) 1587 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [ 1588 AC_TRY_COMPILE([#include <math.h>], 1589 [typedef double_t my_double_t; 1590 typedef float_t my_float_t; 1591 acosh(0.0); 1592 acoshf(0.0f); 1593 acoshl(0.0l); 1594 asinh(0.0); 1595 asinhf(0.0f); 1596 asinhl(0.0l); 1597 atanh(0.0); 1598 atanhf(0.0f); 1599 atanhl(0.0l); 1600 cbrt(0.0); 1601 cbrtf(0.0f); 1602 cbrtl(0.0l); 1603 copysign(0.0, 0.0); 1604 copysignf(0.0f, 0.0f); 1605 copysignl(0.0l, 0.0l); 1606 erf(0.0); 1607 erff(0.0f); 1608 erfl(0.0l); 1609 erfc(0.0); 1610 erfcf(0.0f); 1611 erfcl(0.0l); 1612 exp2(0.0); 1613 exp2f(0.0f); 1614 exp2l(0.0l); 1615 expm1(0.0); 1616 expm1f(0.0f); 1617 expm1l(0.0l); 1618 fdim(0.0, 0.0); 1619 fdimf(0.0f, 0.0f); 1620 fdiml(0.0l, 0.0l); 1621 fma(0.0, 0.0, 0.0); 1622 fmaf(0.0f, 0.0f, 0.0f); 1623 fmal(0.0l, 0.0l, 0.0l); 1624 fmax(0.0, 0.0); 1625 fmaxf(0.0f, 0.0f); 1626 fmaxl(0.0l, 0.0l); 1627 fmin(0.0, 0.0); 1628 fminf(0.0f, 0.0f); 1629 fminl(0.0l, 0.0l); 1630 hypot(0.0, 0.0); 1631 hypotf(0.0f, 0.0f); 1632 hypotl(0.0l, 0.0l); 1633 ilogb(0.0); 1634 ilogbf(0.0f); 1635 ilogbl(0.0l); 1636 lgamma(0.0); 1637 lgammaf(0.0f); 1638 lgammal(0.0l); 1639 llrint(0.0); 1640 llrintf(0.0f); 1641 llrintl(0.0l); 1642 llround(0.0); 1643 llroundf(0.0f); 1644 llroundl(0.0l); 1645 log1p(0.0); 1646 log1pf(0.0f); 1647 log1pl(0.0l); 1648 log2(0.0); 1649 log2f(0.0f); 1650 log2l(0.0l); 1651 logb(0.0); 1652 logbf(0.0f); 1653 logbl(0.0l); 1654 lrint(0.0); 1655 lrintf(0.0f); 1656 lrintl(0.0l); 1657 lround(0.0); 1658 lroundf(0.0f); 1659 lroundl(0.0l); 1660 nan(0); 1661 nanf(0); 1662 nanl(0); 1663 nearbyint(0.0); 1664 nearbyintf(0.0f); 1665 nearbyintl(0.0l); 1666 nextafter(0.0, 0.0); 1667 nextafterf(0.0f, 0.0f); 1668 nextafterl(0.0l, 0.0l); 1669 nexttoward(0.0, 0.0); 1670 nexttowardf(0.0f, 0.0f); 1671 nexttowardl(0.0l, 0.0l); 1672 remainder(0.0, 0.0); 1673 remainderf(0.0f, 0.0f); 1674 remainderl(0.0l, 0.0l); 1675 remquo(0.0, 0.0, 0); 1676 remquof(0.0f, 0.0f, 0); 1677 remquol(0.0l, 0.0l, 0); 1678 rint(0.0); 1679 rintf(0.0f); 1680 rintl(0.0l); 1681 round(0.0); 1682 roundf(0.0f); 1683 roundl(0.0l); 1684 scalbln(0.0, 0l); 1685 scalblnf(0.0f, 0l); 1686 scalblnl(0.0l, 0l); 1687 scalbn(0.0, 0); 1688 scalbnf(0.0f, 0); 1689 scalbnl(0.0l, 0); 1690 tgamma(0.0); 1691 tgammaf(0.0f); 1692 tgammal(0.0l); 1693 trunc(0.0); 1694 truncf(0.0f); 1695 truncl(0.0l); 1696 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no]) 1697 ]) 1698 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1) 1699 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then 1700 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1, 1701 [Define if C99 functions or macros in <math.h> should be imported 1702 in <tr1/cmath> in namespace std::tr1.]) 1703 fi 1704 1705 # Check for the existence of <inttypes.h> functions (NB: doesn't make 1706 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1). 1707 ac_c99_inttypes_tr1=no; 1708 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 1709 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>]) 1710 AC_TRY_COMPILE([#include <inttypes.h>], 1711 [intmax_t i, numer, denom, base; 1712 const char* s; 1713 char** endptr; 1714 intmax_t ret = imaxabs(i); 1715 imaxdiv_t dret = imaxdiv(numer, denom); 1716 ret = strtoimax(s, endptr, base); 1717 uintmax_t uret = strtoumax(s, endptr, base); 1718 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no]) 1719 fi 1720 AC_MSG_RESULT($ac_c99_inttypes_tr1) 1721 if test x"$ac_c99_inttypes_tr1" = x"yes"; then 1722 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1, 1723 [Define if C99 functions in <inttypes.h> should be imported in 1724 <tr1/cinttypes> in namespace std::tr1.]) 1725 fi 1726 1727 # Check for the existence of whcar_t <inttypes.h> functions (NB: doesn't 1728 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1). 1729 ac_c99_inttypes_wchar_t_tr1=no; 1730 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 1731 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>]) 1732 AC_TRY_COMPILE([#include <inttypes.h>], 1733 [intmax_t base; 1734 const wchar_t* s; 1735 wchar_t** endptr; 1736 intmax_t ret = wcstoimax(s, endptr, base); 1737 uintmax_t uret = wcstoumax(s, endptr, base); 1738 ],[ac_c99_inttypes_wchar_t_tr1=yes], 1739 [ac_c99_inttypes_wchar_t_tr1=no]) 1740 fi 1741 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1) 1742 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then 1743 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1, 1744 [Define if wchar_t C99 functions in <inttypes.h> should be 1745 imported in <tr1/cinttypes> in namespace std::tr1.]) 1746 fi 1747 1748 # Check for the existence of the <stdbool.h> header. 1749 AC_CHECK_HEADERS(stdbool.h) 1750 1751 # Check for the existence of the <stdalign.h> header. 1752 AC_CHECK_HEADERS(stdalign.h) 1753 1754 CXXFLAGS="$ac_save_CXXFLAGS" 1755 AC_LANG_RESTORE 1756]) 1757 1758dnl 1759dnl Check whether "/dev/random" and "/dev/urandom" are available for the 1760dnl random_device of "TR1" (Chapter 5.1, "Random number generation"). 1761dnl 1762AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [ 1763 1764 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device]) 1765 AC_CACHE_VAL(glibcxx_cv_random_tr1, [ 1766 if test -r /dev/random && test -r /dev/urandom; then 1767 ## For MSys environment the test above is detect as false-positive 1768 ## on mingw-targets. So disable it explicit for them. 1769 case ${target_os} in 1770 *mingw*) glibcxx_cv_random_tr1=no ;; 1771 *) glibcxx_cv_random_tr1=yes ;; 1772 esac 1773 else 1774 glibcxx_cv_random_tr1=no; 1775 fi 1776 ]) 1777 AC_MSG_RESULT($glibcxx_cv_random_tr1) 1778 1779 if test x"$glibcxx_cv_random_tr1" = x"yes"; then 1780 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1, 1781 [Define if /dev/random and /dev/urandom are available for 1782 the random_device of TR1 (Chapter 5.1).]) 1783 fi 1784 1785]) 1786 1787dnl 1788dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants. 1789dnl 1790AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [ 1791 1792 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [ 1793 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]], 1794 [#include <stdio.h>], 1795 [AC_MSG_ERROR([computing EOF failed])]) 1796 ]) 1797 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof, 1798 [Define to the value of the EOF integer constant.]) 1799 1800 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [ 1801 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]], 1802 [#include <stdio.h>], 1803 [AC_MSG_ERROR([computing SEEK_CUR failed])]) 1804 ]) 1805 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur, 1806 [Define to the value of the SEEK_CUR integer constant.]) 1807 1808 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [ 1809 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]], 1810 [#include <stdio.h>], 1811 [AC_MSG_ERROR([computing SEEK_END failed])]) 1812 ]) 1813 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end, 1814 [Define to the value of the SEEK_END integer constant.]) 1815]) 1816 1817dnl 1818dnl Check whether required C++ overloads are present in <stdio.h>. 1819dnl 1820AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [ 1821 1822 AC_LANG_SAVE 1823 AC_LANG_CPLUSPLUS 1824 1825 AC_MSG_CHECKING([for gets declaration]) 1826 AC_CACHE_VAL(glibcxx_cv_gets, [ 1827 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 1828 [#include <stdio.h> 1829 namespace test 1830 { 1831 using ::gets; 1832 } 1833 ])], 1834 [glibcxx_cv_gets=yes], 1835 [glibcxx_cv_gets=no] 1836 )]) 1837 1838 if test $glibcxx_cv_gets = yes; then 1839 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h>.]) 1840 fi 1841 AC_MSG_RESULT($glibcxx_cv_gets) 1842 1843 AC_LANG_RESTORE 1844]) 1845 1846dnl 1847dnl Check whether macros, etc are present for <system_error> 1848dnl 1849AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [ 1850 1851m4_pushdef([n_syserr], [1])dnl 1852m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA, 1853 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED, 1854 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY, 1855 ECHILD, ENOSPC, EPERM, 1856 ETIMEDOUT, EWOULDBLOCK], 1857[m4_pushdef([SYSERR], m4_toupper(syserr))dnl 1858AC_MSG_CHECKING([for syserr]) 1859AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [ 1860AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]], 1861 [int i = syserr;])], 1862 [glibcxx_cv_system_error[]n_syserr=yes], 1863 [glibcxx_cv_system_error[]n_syserr=no]) 1864]) 1865AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr]) 1866if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then 1867 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.]) 1868fi 1869m4_define([n_syserr], m4_incr(n_syserr))dnl 1870m4_popdef([SYSERR])dnl 1871]) 1872m4_popdef([n_syserr])dnl 1873]) 1874 1875dnl 1876dnl Check for what type of C headers to use. 1877dnl 1878dnl --enable-cheaders= [does stuff]. 1879dnl --disable-cheaders [does not do anything, really]. 1880dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)] 1881dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'. 1882dnl 1883AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [ 1884 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]], 1885 [construct "C" headers for g++], [permit c|c_std|c_global]) 1886 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders) 1887 1888 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders 1889 1890 # Allow overrides to configure.host here. 1891 if test $enable_cheaders = c_global; then 1892 c_compatibility=yes 1893 fi 1894 1895 AC_SUBST(C_INCLUDE_DIR) 1896 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c) 1897 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std) 1898 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global) 1899 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes) 1900]) 1901 1902 1903dnl 1904dnl Check for which locale library to use. The choice is mapped to 1905dnl a subdirectory of config/locale. 1906dnl 1907dnl Default is generic. 1908dnl 1909AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [ 1910 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]], 1911 [use MODEL for target locale package], 1912 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto]) 1913 1914 # Deal with gettext issues. Default to not using it (=no) until we detect 1915 # support for it later. Let the user turn it off via --e/d, but let that 1916 # default to on for easier handling. 1917 USE_NLS=no 1918 AC_ARG_ENABLE(nls, 1919 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]), 1920 [], 1921 [enable_nls=yes]) 1922 1923 # Either a known package, or "auto" 1924 if test $enable_clocale = no || test $enable_clocale = yes; then 1925 enable_clocale=auto 1926 fi 1927 enable_clocale_flag=$enable_clocale 1928 1929 # Probe for locale model to use if none specified. 1930 # Default to "generic". 1931 if test $enable_clocale_flag = auto; then 1932 case ${target_os} in 1933 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) 1934 enable_clocale_flag=gnu 1935 ;; 1936 darwin* | freebsd*) 1937 enable_clocale_flag=darwin 1938 ;; 1939 openbsd*) 1940 enable_clocale_flag=newlib 1941 ;; 1942 *) 1943 if test x"$with_newlib" = x"yes"; then 1944 enable_clocale_flag=newlib 1945 else 1946 enable_clocale_flag=generic 1947 fi 1948 ;; 1949 esac 1950 fi 1951 1952 # Sanity check model, and test for special functionality. 1953 if test $enable_clocale_flag = gnu; then 1954 AC_EGREP_CPP([_GLIBCXX_ok], [ 1955 #include <features.h> 1956 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__) 1957 _GLIBCXX_ok 1958 #endif 1959 ], enable_clocale_flag=gnu, enable_clocale_flag=generic) 1960 1961 # Set it to scream when it hurts. 1962 ac_save_CFLAGS="$CFLAGS" 1963 CFLAGS="-Wimplicit-function-declaration -Werror" 1964 1965 # Use strxfrm_l if available. 1966 AC_TRY_COMPILE([#define _GNU_SOURCE 1 1967 #include <string.h> 1968 #include <locale.h>], 1969 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);], 1970 AC_DEFINE(HAVE_STRXFRM_L, 1, 1971 [Define if strxfrm_l is available in <string.h>.]),) 1972 1973 # Use strerror_l if available. 1974 AC_TRY_COMPILE([#define _GNU_SOURCE 1 1975 #include <string.h> 1976 #include <locale.h>], 1977 [__locale_t loc; strerror_l(5, loc);], 1978 AC_DEFINE(HAVE_STRERROR_L, 1, 1979 [Define if strerror_l is available in <string.h>.]),) 1980 1981 CFLAGS="$ac_save_CFLAGS" 1982 fi 1983 1984 # Perhaps use strerror_r if available, and strerror_l isn't. 1985 ac_save_CFLAGS="$CFLAGS" 1986 CFLAGS="-Wimplicit-function-declaration -Werror" 1987 AC_TRY_COMPILE([#define _GNU_SOURCE 1 1988 #include <string.h> 1989 #include <locale.h>], 1990 [char s[128]; strerror_r(5, s, 128);], 1991 AC_DEFINE(HAVE_STRERROR_R, 1, 1992 [Define if strerror_r is available in <string.h>.]),) 1993 CFLAGS="$ac_save_CFLAGS" 1994 1995 # Set configure bits for specified locale package 1996 AC_MSG_CHECKING([for C locale to use]) 1997 case ${enable_clocale_flag} in 1998 generic) 1999 AC_MSG_RESULT(generic) 2000 2001 CLOCALE_H=config/locale/generic/c_locale.h 2002 CLOCALE_CC=config/locale/generic/c_locale.cc 2003 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2004 CCOLLATE_CC=config/locale/generic/collate_members.cc 2005 CCTYPE_CC=config/locale/generic/ctype_members.cc 2006 CMESSAGES_H=config/locale/generic/messages_members.h 2007 CMESSAGES_CC=config/locale/generic/messages_members.cc 2008 CMONEY_CC=config/locale/generic/monetary_members.cc 2009 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2010 CTIME_H=config/locale/generic/time_members.h 2011 CTIME_CC=config/locale/generic/time_members.cc 2012 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2013 ;; 2014 darwin) 2015 AC_MSG_RESULT(darwin or freebsd) 2016 2017 CLOCALE_H=config/locale/generic/c_locale.h 2018 CLOCALE_CC=config/locale/generic/c_locale.cc 2019 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2020 CCOLLATE_CC=config/locale/generic/collate_members.cc 2021 CCTYPE_CC=config/locale/darwin/ctype_members.cc 2022 CMESSAGES_H=config/locale/generic/messages_members.h 2023 CMESSAGES_CC=config/locale/generic/messages_members.cc 2024 CMONEY_CC=config/locale/generic/monetary_members.cc 2025 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2026 CTIME_H=config/locale/generic/time_members.h 2027 CTIME_CC=config/locale/generic/time_members.cc 2028 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2029 ;; 2030 2031 gnu) 2032 AC_MSG_RESULT(gnu) 2033 2034 # Declare intention to use gettext, and add support for specific 2035 # languages. 2036 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT 2037 ALL_LINGUAS="de fr" 2038 2039 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc. 2040 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no) 2041 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then 2042 USE_NLS=yes 2043 fi 2044 # Export the build objects. 2045 for ling in $ALL_LINGUAS; do \ 2046 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \ 2047 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \ 2048 done 2049 AC_SUBST(glibcxx_MOFILES) 2050 AC_SUBST(glibcxx_POFILES) 2051 2052 CLOCALE_H=config/locale/gnu/c_locale.h 2053 CLOCALE_CC=config/locale/gnu/c_locale.cc 2054 CCODECVT_CC=config/locale/gnu/codecvt_members.cc 2055 CCOLLATE_CC=config/locale/gnu/collate_members.cc 2056 CCTYPE_CC=config/locale/gnu/ctype_members.cc 2057 CMESSAGES_H=config/locale/gnu/messages_members.h 2058 CMESSAGES_CC=config/locale/gnu/messages_members.cc 2059 CMONEY_CC=config/locale/gnu/monetary_members.cc 2060 CNUMERIC_CC=config/locale/gnu/numeric_members.cc 2061 CTIME_H=config/locale/gnu/time_members.h 2062 CTIME_CC=config/locale/gnu/time_members.cc 2063 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h 2064 ;; 2065 ieee_1003.1-2001) 2066 AC_MSG_RESULT(IEEE 1003.1) 2067 2068 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h 2069 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc 2070 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2071 CCOLLATE_CC=config/locale/generic/collate_members.cc 2072 CCTYPE_CC=config/locale/generic/ctype_members.cc 2073 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h 2074 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc 2075 CMONEY_CC=config/locale/generic/monetary_members.cc 2076 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2077 CTIME_H=config/locale/generic/time_members.h 2078 CTIME_CC=config/locale/generic/time_members.cc 2079 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2080 ;; 2081 newlib) 2082 AC_MSG_RESULT(newlib) 2083 2084 CLOCALE_H=config/locale/generic/c_locale.h 2085 CLOCALE_CC=config/locale/generic/c_locale.cc 2086 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2087 CCOLLATE_CC=config/locale/generic/collate_members.cc 2088 CCTYPE_CC=config/locale/newlib/ctype_members.cc 2089 CMESSAGES_H=config/locale/generic/messages_members.h 2090 CMESSAGES_CC=config/locale/generic/messages_members.cc 2091 CMONEY_CC=config/locale/generic/monetary_members.cc 2092 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2093 CTIME_H=config/locale/generic/time_members.h 2094 CTIME_CC=config/locale/generic/time_members.cc 2095 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2096 ;; 2097 esac 2098 2099 # This is where the testsuite looks for locale catalogs, using the 2100 # -DLOCALEDIR define during testsuite compilation. 2101 glibcxx_localedir=${glibcxx_builddir}/po/share/locale 2102 AC_SUBST(glibcxx_localedir) 2103 2104 # A standalone libintl (e.g., GNU libintl) may be in use. 2105 if test $USE_NLS = yes; then 2106 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no) 2107 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no) 2108 fi 2109 if test $USE_NLS = yes; then 2110 AC_DEFINE(_GLIBCXX_USE_NLS, 1, 2111 [Define if NLS translations are to be used.]) 2112 fi 2113 2114 AC_SUBST(USE_NLS) 2115 AC_SUBST(CLOCALE_H) 2116 AC_SUBST(CMESSAGES_H) 2117 AC_SUBST(CCODECVT_CC) 2118 AC_SUBST(CCOLLATE_CC) 2119 AC_SUBST(CCTYPE_CC) 2120 AC_SUBST(CMESSAGES_CC) 2121 AC_SUBST(CMONEY_CC) 2122 AC_SUBST(CNUMERIC_CC) 2123 AC_SUBST(CTIME_H) 2124 AC_SUBST(CTIME_CC) 2125 AC_SUBST(CLOCALE_CC) 2126 AC_SUBST(CLOCALE_INTERNAL_H) 2127]) 2128 2129 2130dnl 2131dnl Check for which std::allocator base class to use. The choice is 2132dnl mapped from a subdirectory of include/ext. 2133dnl 2134dnl Default is new. 2135dnl 2136AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [ 2137 AC_MSG_CHECKING([for std::allocator base class]) 2138 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]], 2139 [use KIND for target std::allocator base], 2140 [permit new|malloc|mt|bitmap|pool|yes|no|auto]) 2141 2142 # If they didn't use this option switch, or if they specified --enable 2143 # with no specific model, we'll have to look for one. If they 2144 # specified --disable (???), do likewise. 2145 if test $enable_libstdcxx_allocator = no || 2146 test $enable_libstdcxx_allocator = yes; 2147 then 2148 enable_libstdcxx_allocator=auto 2149 fi 2150 2151 # Either a known package, or "auto". Auto implies the default choice 2152 # for a particular platform. 2153 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator 2154 2155 # Probe for host-specific support if no specific model is specified. 2156 # Default to "new". 2157 if test $enable_libstdcxx_allocator_flag = auto; then 2158 case ${target_os} in 2159 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) 2160 enable_libstdcxx_allocator_flag=new 2161 ;; 2162 *) 2163 enable_libstdcxx_allocator_flag=new 2164 ;; 2165 esac 2166 fi 2167 AC_MSG_RESULT($enable_libstdcxx_allocator_flag) 2168 2169 2170 # Set configure bits for specified locale package 2171 case ${enable_libstdcxx_allocator_flag} in 2172 bitmap) 2173 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h 2174 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator 2175 ;; 2176 malloc) 2177 ALLOCATOR_H=config/allocator/malloc_allocator_base.h 2178 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator 2179 ;; 2180 mt) 2181 ALLOCATOR_H=config/allocator/mt_allocator_base.h 2182 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc 2183 ;; 2184 new) 2185 ALLOCATOR_H=config/allocator/new_allocator_base.h 2186 ALLOCATOR_NAME=__gnu_cxx::new_allocator 2187 ;; 2188 pool) 2189 ALLOCATOR_H=config/allocator/pool_allocator_base.h 2190 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc 2191 ;; 2192 esac 2193 2194 AC_SUBST(ALLOCATOR_H) 2195 AC_SUBST(ALLOCATOR_NAME) 2196]) 2197 2198 2199dnl 2200dnl Check for whether the Boost-derived checks should be turned on. 2201dnl 2202dnl --enable-concept-checks turns them on. 2203dnl --disable-concept-checks leaves them off. 2204dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)] 2205dnl Where DEFAULT is either `yes' or `no'. 2206dnl 2207AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [ 2208 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks]) 2209 if test $enable_concept_checks = yes; then 2210 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1, 2211 [Define to use concept checking code from the boost libraries.]) 2212 fi 2213]) 2214 2215dnl 2216dnl Use extern templates. 2217dnl 2218dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1 2219dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0 2220 2221dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)] 2222dnl Where DEFAULT is `yes' or `no'. 2223dnl 2224AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [ 2225 2226 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template]) 2227 2228 AC_MSG_CHECKING([for extern template support]) 2229 AC_MSG_RESULT([$enable_extern_template]) 2230 2231 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes) 2232]) 2233 2234dnl 2235dnl Check for parallel mode pre-requisites, including OpenMP support. 2236dnl 2237dnl + Usage: GLIBCXX_ENABLE_PARALLEL 2238dnl 2239AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [ 2240 2241 enable_parallel=no; 2242 2243 # See if configured libgomp/omp.h exists. (libgomp may be in 2244 # noconfigdirs but not explicitly disabled.) 2245 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then 2246 enable_parallel=yes; 2247 else 2248 AC_MSG_NOTICE([target-libgomp not built]) 2249 fi 2250 2251 AC_MSG_CHECKING([for parallel mode support]) 2252 AC_MSG_RESULT([$enable_parallel]) 2253]) 2254 2255 2256dnl 2257dnl Check for which I/O library to use: stdio, or something specific. 2258dnl 2259dnl Default is stdio. 2260dnl 2261AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [ 2262 AC_MSG_CHECKING([for underlying I/O to use]) 2263 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]], 2264 [use target-specific I/O package], [permit stdio]) 2265 2266 # Now that libio has been removed, you can have any color you want as long 2267 # as it's black. This is one big no-op until other packages are added, but 2268 # showing the framework never hurts. 2269 case ${enable_cstdio} in 2270 stdio) 2271 CSTDIO_H=config/io/c_io_stdio.h 2272 BASIC_FILE_H=config/io/basic_file_stdio.h 2273 BASIC_FILE_CC=config/io/basic_file_stdio.cc 2274 AC_MSG_RESULT(stdio) 2275 ;; 2276 esac 2277 2278 AC_SUBST(CSTDIO_H) 2279 AC_SUBST(BASIC_FILE_H) 2280 AC_SUBST(BASIC_FILE_CC) 2281]) 2282 2283 2284dnl 2285dnl Check for "unusual" flags to pass to the compiler while building. 2286dnl 2287dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing 2288dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc. 2289dnl --disable-cxx-flags passes nothing. 2290dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html 2291dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html 2292dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html 2293dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags) 2294dnl If "default flags" is an empty string, the effect is the same 2295dnl as --disable or --enable=no. 2296dnl 2297AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl 2298 AC_MSG_CHECKING([for extra compiler flags for building]) 2299 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS], 2300 [pass compiler FLAGS when building library], 2301 [case "x$enable_cxx_flags" in 2302 xno | x) enable_cxx_flags= ;; 2303 x-*) ;; 2304 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 2305 esac]) 2306 2307 # Run through flags (either default or command-line) and set anything 2308 # extra (e.g., #defines) that must accompany particular g++ options. 2309 if test -n "$enable_cxx_flags"; then 2310 for f in $enable_cxx_flags; do 2311 case "$f" in 2312 -fhonor-std) ;; 2313 -*) ;; 2314 *) # and we're trying to pass /what/ exactly? 2315 AC_MSG_ERROR([compiler flags start with a -]) ;; 2316 esac 2317 done 2318 fi 2319 2320 EXTRA_CXX_FLAGS="$enable_cxx_flags" 2321 AC_MSG_RESULT($EXTRA_CXX_FLAGS) 2322 AC_SUBST(EXTRA_CXX_FLAGS) 2323]) 2324 2325 2326dnl 2327dnl Check to see if debugging libraries are to be built. 2328dnl 2329dnl --enable-libstdcxx-debug 2330dnl builds a separate set of debugging libraries in addition to the 2331dnl normal (shared, static) libstdc++ binaries. 2332dnl 2333dnl --disable-libstdcxx-debug 2334dnl builds only one (non-debug) version of libstdc++. 2335dnl 2336dnl --enable-libstdcxx-debug-flags=FLAGS 2337dnl iff --enable-debug == yes, then use FLAGS to build the debug library. 2338dnl 2339dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)] 2340dnl Where DEFAULT is either `yes' or `no'. 2341dnl 2342AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [ 2343 AC_MSG_CHECKING([for additional debug build]) 2344 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library]) 2345 AC_MSG_RESULT($enable_libstdcxx_debug) 2346 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes) 2347]) 2348 2349 2350dnl 2351dnl Check for explicit debug flags. 2352dnl 2353dnl --enable-libstdcxx-debug-flags='-O1' 2354dnl is a general method for passing flags to be used when 2355dnl building debug libraries with --enable-debug. 2356dnl 2357dnl --disable-libstdcxx-debug-flags does nothing. 2358dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags) 2359dnl If "default flags" is an empty string, the effect is the same 2360dnl as --disable or --enable=no. 2361dnl 2362AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [ 2363 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS], 2364 [pass compiler FLAGS when building debug library], 2365 [case "x$enable_libstdcxx_debug_flags" in 2366 xno | x) enable_libstdcxx_debug_flags= ;; 2367 x-*) ;; 2368 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 2369 esac]) 2370 2371 # Option parsed, now set things appropriately 2372 DEBUG_FLAGS="$enable_libstdcxx_debug_flags" 2373 AC_SUBST(DEBUG_FLAGS) 2374 2375 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS]) 2376]) 2377 2378 2379dnl 2380dnl Check if the user only wants a freestanding library implementation. 2381dnl 2382dnl --disable-hosted-libstdcxx will turn off most of the library build, 2383dnl installing only the headers required by [17.4.1.3] and the language 2384dnl support library. More than that will be built (to keep the Makefiles 2385dnl conveniently clean), but not installed. 2386dnl 2387dnl Sets: 2388dnl is_hosted (yes/no) 2389dnl 2390dnl Defines: 2391dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0) 2392dnl 2393AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [ 2394 AC_ARG_ENABLE([hosted-libstdcxx], 2395 AC_HELP_STRING([--disable-hosted-libstdcxx], 2396 [only build freestanding C++ runtime support]),, 2397 [case "$host" in 2398 arm*-*-symbianelf*) 2399 enable_hosted_libstdcxx=no 2400 ;; 2401 *) 2402 enable_hosted_libstdcxx=yes 2403 ;; 2404 esac]) 2405 if test "$enable_hosted_libstdcxx" = no; then 2406 AC_MSG_NOTICE([Only freestanding libraries will be built]) 2407 is_hosted=no 2408 hosted_define=0 2409 enable_abi_check=no 2410 enable_libstdcxx_pch=no 2411 else 2412 is_hosted=yes 2413 hosted_define=1 2414 fi 2415 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes) 2416 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define, 2417 [Define to 1 if a full hosted library is built, or 0 if freestanding.]) 2418]) 2419 2420 2421dnl 2422dnl Check if the user wants a non-verbose library implementation. 2423dnl 2424dnl --disable-libstdcxx-verbose will turn off descriptive messages to 2425dnl standard error on termination. 2426dnl 2427dnl Defines: 2428dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0) 2429dnl 2430AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [ 2431 AC_ARG_ENABLE([libstdcxx-verbose], 2432 AC_HELP_STRING([--disable-libstdcxx-verbose], 2433 [disable termination messages to standard error]),, 2434 [enable_libstdcxx_verbose=yes]) 2435 if test x"$enable_libstdcxx_verbose" = xyes; then 2436 verbose_define=1 2437 else 2438 AC_MSG_NOTICE([verbose termination messages are disabled]) 2439 verbose_define=0 2440 fi 2441 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define, 2442 [Define to 1 if a verbose library is built, or 0 otherwise.]) 2443]) 2444 2445 2446dnl 2447dnl Check for template specializations for the 'long long' type. 2448dnl The result determines only whether 'long long' I/O is enabled; things 2449dnl like numeric_limits<> specializations are always available. 2450dnl 2451dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG 2452dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined 2453dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)] 2454dnl Where DEFAULT is either `yes' or `no'. 2455dnl 2456AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [ 2457 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long']) 2458 if test $enable_long_long = yes; then 2459 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1, 2460 [Define if code specialized for long long should be used.]) 2461 fi 2462 AC_MSG_CHECKING([for enabled long long specializations]) 2463 AC_MSG_RESULT([$enable_long_long]) 2464]) 2465 2466 2467dnl 2468dnl Check for decimal floating point. 2469dnl See: 2470dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float 2471dnl 2472dnl This checks to see if the host supports decimal floating point types. 2473dnl 2474dnl Defines: 2475dnl _GLIBCXX_USE_DECIMAL_FLOAT 2476dnl 2477AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [ 2478 2479 # Fake what AC_TRY_COMPILE does, without linking as this is 2480 # unnecessary for this test. 2481 2482 cat > conftest.$ac_ext << EOF 2483[#]line __oline__ "configure" 2484int main() 2485{ 2486 _Decimal32 d1; 2487 _Decimal64 d2; 2488 _Decimal128 d3; 2489 return 0; 2490} 2491EOF 2492 2493 AC_MSG_CHECKING([for ISO/IEC TR 24733 ]) 2494 if AC_TRY_EVAL(ac_compile); then 2495 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1, 2496 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.]) 2497 enable_dfp=yes 2498 else 2499 enable_dfp=no 2500 fi 2501 AC_MSG_RESULT($enable_dfp) 2502 rm -f conftest* 2503]) 2504 2505dnl 2506dnl Check for GNU 128-bit integer and floating point types. 2507dnl 2508dnl Note: also checks that the types aren't standard types. 2509dnl 2510dnl Defines: 2511dnl _GLIBCXX_USE_INT128 2512dnl _GLIBCXX_USE_FLOAT128 2513dnl 2514AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [ 2515 2516 AC_LANG_SAVE 2517 AC_LANG_CPLUSPLUS 2518 2519 # Fake what AC_TRY_COMPILE does, without linking as this is 2520 # unnecessary for this test. 2521 2522 cat > conftest.$ac_ext << EOF 2523[#]line __oline__ "configure" 2524template<typename T1, typename T2> 2525 struct same 2526 { typedef T2 type; }; 2527 2528template<typename T> 2529 struct same<T, T>; 2530 2531int main() 2532{ 2533 typename same<long, __int128>::type i1; 2534 typename same<long long, __int128>::type i2; 2535} 2536EOF 2537 2538 AC_MSG_CHECKING([for __int128]) 2539 if AC_TRY_EVAL(ac_compile); then 2540 AC_DEFINE(_GLIBCXX_USE_INT128, 1, 2541 [Define if __int128 is supported on this host.]) 2542 enable_int128=yes 2543 else 2544 enable_int128=no 2545 fi 2546 AC_MSG_RESULT($enable_int128) 2547 rm -f conftest* 2548 2549 cat > conftest.$ac_ext << EOF 2550[#]line __oline__ "configure" 2551template<typename T1, typename T2> 2552 struct same 2553 { typedef T2 type; }; 2554 2555template<typename T> 2556 struct same<T, T>; 2557 2558int main() 2559{ 2560 typename same<double, __float128>::type f1; 2561 typename same<long double, __float128>::type f2; 2562} 2563EOF 2564 2565 AC_MSG_CHECKING([for __float128]) 2566 if AC_TRY_EVAL(ac_compile); then 2567 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1, 2568 [Define if __float128 is supported on this host.]) 2569 enable_float128=yes 2570 else 2571 enable_float128=no 2572 fi 2573 AC_MSG_RESULT($enable_float128) 2574 rm -f conftest* 2575 2576 AC_LANG_RESTORE 2577]) 2578 2579dnl 2580dnl Check for template specializations for the 'wchar_t' type. 2581dnl 2582dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T 2583dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined 2584dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)] 2585dnl Where DEFAULT is either `yes' or `no'. 2586dnl 2587dnl Necessary support must also be present. 2588dnl 2589AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [ 2590 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t']) 2591 2592 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos. 2593 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no) 2594 AC_MSG_CHECKING([for mbstate_t]) 2595 AC_TRY_COMPILE([#include <wchar.h>], 2596 [mbstate_t teststate;], 2597 have_mbstate_t=yes, have_mbstate_t=no) 2598 AC_MSG_RESULT($have_mbstate_t) 2599 if test x"$have_mbstate_t" = xyes; then 2600 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.]) 2601 fi 2602 2603 # Test it always, for use in GLIBCXX_ENABLE_C99, together with 2604 # ac_has_wchar_h. 2605 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no) 2606 2607 if test x"$enable_wchar_t" = x"yes"; then 2608 2609 AC_LANG_SAVE 2610 AC_LANG_CPLUSPLUS 2611 2612 if test x"$ac_has_wchar_h" = xyes && 2613 test x"$ac_has_wctype_h" = xyes; then 2614 AC_TRY_COMPILE([#include <wchar.h> 2615 #include <stddef.h> 2616 wint_t i; 2617 long l = WEOF; 2618 long j = WCHAR_MIN; 2619 long k = WCHAR_MAX; 2620 namespace test 2621 { 2622 using ::btowc; 2623 using ::fgetwc; 2624 using ::fgetws; 2625 using ::fputwc; 2626 using ::fputws; 2627 using ::fwide; 2628 using ::fwprintf; 2629 using ::fwscanf; 2630 using ::getwc; 2631 using ::getwchar; 2632 using ::mbrlen; 2633 using ::mbrtowc; 2634 using ::mbsinit; 2635 using ::mbsrtowcs; 2636 using ::putwc; 2637 using ::putwchar; 2638 using ::swprintf; 2639 using ::swscanf; 2640 using ::ungetwc; 2641 using ::vfwprintf; 2642 using ::vswprintf; 2643 using ::vwprintf; 2644 using ::wcrtomb; 2645 using ::wcscat; 2646 using ::wcschr; 2647 using ::wcscmp; 2648 using ::wcscoll; 2649 using ::wcscpy; 2650 using ::wcscspn; 2651 using ::wcsftime; 2652 using ::wcslen; 2653 using ::wcsncat; 2654 using ::wcsncmp; 2655 using ::wcsncpy; 2656 using ::wcspbrk; 2657 using ::wcsrchr; 2658 using ::wcsrtombs; 2659 using ::wcsspn; 2660 using ::wcsstr; 2661 using ::wcstod; 2662 using ::wcstok; 2663 using ::wcstol; 2664 using ::wcstoul; 2665 using ::wcsxfrm; 2666 using ::wctob; 2667 using ::wmemchr; 2668 using ::wmemcmp; 2669 using ::wmemcpy; 2670 using ::wmemmove; 2671 using ::wmemset; 2672 using ::wprintf; 2673 using ::wscanf; 2674 } 2675 ],[],[], [enable_wchar_t=no]) 2676 else 2677 enable_wchar_t=no 2678 fi 2679 2680 AC_LANG_RESTORE 2681 fi 2682 2683 if test x"$enable_wchar_t" = x"yes"; then 2684 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1, 2685 [Define if code specialized for wchar_t should be used.]) 2686 fi 2687 2688 AC_MSG_CHECKING([for enabled wchar_t specializations]) 2689 AC_MSG_RESULT([$enable_wchar_t]) 2690]) 2691 2692 2693dnl 2694dnl Check to see if building and using a C++ precompiled header can be done. 2695dnl 2696dnl --enable-libstdcxx-pch=yes 2697dnl default, this shows intent to use stdc++.h.gch If it looks like it 2698dnl may work, after some light-hearted attempts to puzzle out compiler 2699dnl support, flip bits on in include/Makefile.am 2700dnl 2701dnl --disable-libstdcxx-pch 2702dnl turns off attempts to use or build stdc++.h.gch. 2703dnl 2704dnl Substs: 2705dnl glibcxx_PCHFLAGS 2706dnl 2707AC_DEFUN([GLIBCXX_ENABLE_PCH], [ 2708 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers]) 2709 if test $enable_libstdcxx_pch = yes; then 2710 AC_CACHE_CHECK([for compiler with PCH support], 2711 [glibcxx_cv_prog_CXX_pch], 2712 [ac_save_CXXFLAGS="$CXXFLAGS" 2713 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated" 2714 AC_LANG_SAVE 2715 AC_LANG_CPLUSPLUS 2716 echo '#include <math.h>' > conftest.h 2717 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \ 2718 -o conftest.h.gch 1>&5 2>&1 && 2719 echo '#error "pch failed"' > conftest.h && 2720 echo '#include "conftest.h"' > conftest.cc && 2721 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ; 2722 then 2723 glibcxx_cv_prog_CXX_pch=yes 2724 else 2725 glibcxx_cv_prog_CXX_pch=no 2726 fi 2727 rm -f conftest* 2728 CXXFLAGS=$ac_save_CXXFLAGS 2729 AC_LANG_RESTORE 2730 ]) 2731 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch 2732 fi 2733 2734 AC_MSG_CHECKING([for enabled PCH]) 2735 AC_MSG_RESULT([$enable_libstdcxx_pch]) 2736 2737 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes) 2738 if test $enable_libstdcxx_pch = yes; then 2739 glibcxx_PCHFLAGS="-include bits/stdc++.h" 2740 else 2741 glibcxx_PCHFLAGS="" 2742 fi 2743 AC_SUBST(glibcxx_PCHFLAGS) 2744]) 2745 2746 2747dnl 2748dnl Check for atomic builtins. 2749dnl See: 2750dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html 2751dnl 2752dnl This checks to see if the host supports the compiler-generated 2753dnl builtins for atomic operations for various integral sizes. Note, this 2754dnl is intended to be an all-or-nothing switch, so all the atomic operations 2755dnl that are used should be checked. 2756dnl 2757dnl Note: 2758dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD. 2759dnl 2760AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [ 2761 AC_LANG_SAVE 2762 AC_LANG_CPLUSPLUS 2763 old_CXXFLAGS="$CXXFLAGS" 2764 2765 # Do link tests if possible, instead asm tests, limited to some platforms 2766 # see discussion in PR target/40134, PR libstdc++/40133 and the thread 2767 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html 2768 atomic_builtins_link_tests=no 2769 if test x$gcc_no_link != xyes; then 2770 # Can do link tests. Limit to some tested platforms 2771 case "$host" in 2772 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*) 2773 atomic_builtins_link_tests=yes 2774 ;; 2775 esac 2776 fi 2777 2778 if test x$atomic_builtins_link_tests = xyes; then 2779 2780 # Do link tests. 2781 2782 CXXFLAGS="$CXXFLAGS -fno-exceptions" 2783 2784 AC_MSG_CHECKING([for atomic builtins for bool]) 2785 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [ 2786 AC_TRY_LINK( 2787 [ ], 2788 [typedef bool atomic_type; 2789 atomic_type c1; 2790 atomic_type c2; 2791 atomic_type c3(0); 2792 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 2793 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 2794 __ATOMIC_RELAXED); 2795 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 2796 __atomic_load_n(&c1, __ATOMIC_RELAXED); 2797 ], 2798 [glibcxx_cv_atomic_bool=yes], 2799 [glibcxx_cv_atomic_bool=no]) 2800 ]) 2801 AC_MSG_RESULT($glibcxx_cv_atomic_bool) 2802 2803 AC_MSG_CHECKING([for atomic builtins for short]) 2804 AC_CACHE_VAL(glibcxx_cv_atomic_short, [ 2805 AC_TRY_LINK( 2806 [ ], 2807 [typedef short atomic_type; 2808 atomic_type c1; 2809 atomic_type c2; 2810 atomic_type c3(0); 2811 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 2812 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 2813 __ATOMIC_RELAXED); 2814 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 2815 __atomic_load_n(&c1, __ATOMIC_RELAXED); 2816 ], 2817 [glibcxx_cv_atomic_short=yes], 2818 [glibcxx_cv_atomic_short=no]) 2819 ]) 2820 AC_MSG_RESULT($glibcxx_cv_atomic_short) 2821 2822 AC_MSG_CHECKING([for atomic builtins for int]) 2823 AC_CACHE_VAL(glibcxx_cv_atomic_int, [ 2824 AC_TRY_LINK( 2825 [ ], 2826 [typedef int atomic_type; 2827 atomic_type c1; 2828 atomic_type c2; 2829 atomic_type c3(0); 2830 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 2831 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 2832 __ATOMIC_RELAXED); 2833 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 2834 __atomic_load_n(&c1, __ATOMIC_RELAXED); 2835 ], 2836 [glibcxx_cv_atomic_int=yes], 2837 [glibcxx_cv_atomic_int=no]) 2838 ]) 2839 AC_MSG_RESULT($glibcxx_cv_atomic_int) 2840 2841 AC_MSG_CHECKING([for atomic builtins for long long]) 2842 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [ 2843 AC_TRY_LINK( 2844 [ ], 2845 [typedef long long atomic_type; 2846 atomic_type c1; 2847 atomic_type c2; 2848 atomic_type c3(0); 2849 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 2850 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 2851 __ATOMIC_RELAXED); 2852 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 2853 __atomic_load_n(&c1, __ATOMIC_RELAXED); 2854 ], 2855 [glibcxx_cv_atomic_long_long=yes], 2856 [glibcxx_cv_atomic_long_long=no]) 2857 ]) 2858 AC_MSG_RESULT($glibcxx_cv_atomic_long_long) 2859 2860 else 2861 2862 # Do asm tests. 2863 2864 # Compile unoptimized. 2865 CXXFLAGS='-O0 -S' 2866 2867 # Fake what AC_TRY_COMPILE does. 2868 2869 cat > conftest.$ac_ext << EOF 2870[#]line __oline__ "configure" 2871int main() 2872{ 2873 typedef bool atomic_type; 2874 atomic_type c1; 2875 atomic_type c2; 2876 atomic_type c3(0); 2877 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 2878 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 2879 __ATOMIC_RELAXED); 2880 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 2881 __atomic_load_n(&c1, __ATOMIC_RELAXED); 2882 2883 return 0; 2884} 2885EOF 2886 2887 AC_MSG_CHECKING([for atomic builtins for bool]) 2888 if AC_TRY_EVAL(ac_compile); then 2889 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 2890 glibcxx_cv_atomic_bool=no 2891 else 2892 glibcxx_cv_atomic_bool=yes 2893 fi 2894 fi 2895 AC_MSG_RESULT($glibcxx_cv_atomic_bool) 2896 rm -f conftest* 2897 2898 cat > conftest.$ac_ext << EOF 2899[#]line __oline__ "configure" 2900int main() 2901{ 2902 typedef short atomic_type; 2903 atomic_type c1; 2904 atomic_type c2; 2905 atomic_type c3(0); 2906 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 2907 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 2908 __ATOMIC_RELAXED); 2909 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 2910 __atomic_load_n(&c1, __ATOMIC_RELAXED); 2911 2912 return 0; 2913} 2914EOF 2915 2916 AC_MSG_CHECKING([for atomic builtins for short]) 2917 if AC_TRY_EVAL(ac_compile); then 2918 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 2919 glibcxx_cv_atomic_short=no 2920 else 2921 glibcxx_cv_atomic_short=yes 2922 fi 2923 fi 2924 AC_MSG_RESULT($glibcxx_cv_atomic_short) 2925 rm -f conftest* 2926 2927 cat > conftest.$ac_ext << EOF 2928[#]line __oline__ "configure" 2929int main() 2930{ 2931 // NB: _Atomic_word not necessarily int. 2932 typedef int atomic_type; 2933 atomic_type c1; 2934 atomic_type c2; 2935 atomic_type c3(0); 2936 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 2937 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 2938 __ATOMIC_RELAXED); 2939 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 2940 __atomic_load_n(&c1, __ATOMIC_RELAXED); 2941 2942 return 0; 2943} 2944EOF 2945 2946 AC_MSG_CHECKING([for atomic builtins for int]) 2947 if AC_TRY_EVAL(ac_compile); then 2948 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 2949 glibcxx_cv_atomic_int=no 2950 else 2951 glibcxx_cv_atomic_int=yes 2952 fi 2953 fi 2954 AC_MSG_RESULT($glibcxx_cv_atomic_int) 2955 rm -f conftest* 2956 2957 cat > conftest.$ac_ext << EOF 2958[#]line __oline__ "configure" 2959int main() 2960{ 2961 typedef long long atomic_type; 2962 atomic_type c1; 2963 atomic_type c2; 2964 atomic_type c3(0); 2965 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 2966 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 2967 __ATOMIC_RELAXED); 2968 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 2969 __atomic_load_n(&c1, __ATOMIC_RELAXED); 2970 2971 return 0; 2972} 2973EOF 2974 2975 AC_MSG_CHECKING([for atomic builtins for long long]) 2976 if AC_TRY_EVAL(ac_compile); then 2977 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 2978 glibcxx_cv_atomic_long_long=no 2979 else 2980 glibcxx_cv_atomic_long_long=yes 2981 fi 2982 fi 2983 AC_MSG_RESULT($glibcxx_cv_atomic_long_long) 2984 rm -f conftest* 2985 2986 fi 2987 2988 CXXFLAGS="$old_CXXFLAGS" 2989 AC_LANG_RESTORE 2990 2991 # Set atomicity_dir to builtins if all but the long long test above passes. 2992 if test $glibcxx_cv_atomic_bool = yes \ 2993 && test $glibcxx_cv_atomic_short = yes \ 2994 && test $glibcxx_cv_atomic_int = yes; then 2995 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1, 2996 [Define if the compiler supports C++11 atomics.]) 2997 atomicity_dir=cpu/generic/atomicity_builtins 2998 fi 2999 3000 # If still generic, set to mutex. 3001 if test $atomicity_dir = "cpu/generic" ; then 3002 atomicity_dir=cpu/generic/atomicity_mutex 3003 AC_MSG_WARN([No native atomic operations are provided for this platform.]) 3004 if test "x$target_thread_file" = xsingle; then 3005 AC_MSG_WARN([They cannot be faked when thread support is disabled.]) 3006 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.]) 3007 else 3008 AC_MSG_WARN([They will be faked using a mutex.]) 3009 AC_MSG_WARN([Performance of certain classes will degrade as a result.]) 3010 fi 3011 fi 3012 3013]) 3014 3015 3016dnl 3017dnl Check for exception handling support. If an explicit enable/disable 3018dnl sjlj exceptions is given, we don't have to detect. Otherwise the 3019dnl target may or may not support call frame exceptions. 3020dnl 3021dnl --enable-sjlj-exceptions forces the use of builtin setjmp. 3022dnl --disable-sjlj-exceptions forces the use of call frame unwinding. 3023dnl Neither one forces an attempt at detection. 3024dnl 3025dnl Defines: 3026dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it 3027dnl 3028AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [ 3029 AC_MSG_CHECKING([for exception model to use]) 3030 AC_LANG_SAVE 3031 AC_LANG_CPLUSPLUS 3032 GLIBCXX_ENABLE(sjlj-exceptions,auto,, 3033 [force use of builtin_setjmp for exceptions], 3034 [permit yes|no|auto]) 3035 3036 if test $enable_sjlj_exceptions = auto; then 3037 # Botheration. Now we've got to detect the exception model. Link tests 3038 # against libgcc.a are problematic since we've not been given proper -L 3039 # bits for single-tree newlib and libgloss. 3040 # 3041 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style. 3042 cat > conftest.$ac_ext << EOF 3043[#]line __oline__ "configure" 3044struct S { ~S(); }; 3045void bar(); 3046void foo() 3047{ 3048 S s; 3049 bar(); 3050} 3051EOF 3052 old_CXXFLAGS="$CXXFLAGS" 3053 CXXFLAGS=-S 3054 if AC_TRY_EVAL(ac_compile); then 3055 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then 3056 enable_sjlj_exceptions=yes 3057 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then 3058 enable_sjlj_exceptions=no 3059 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then 3060 enable_sjlj_exceptions=no 3061 fi 3062 fi 3063 CXXFLAGS="$old_CXXFLAGS" 3064 rm -f conftest* 3065 fi 3066 3067 # This is a tad weird, for hysterical raisins. We have to map 3068 # enable/disable to two different models. 3069 case $enable_sjlj_exceptions in 3070 yes) 3071 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1, 3072 [Define if the compiler is configured for setjmp/longjmp exceptions.]) 3073 ac_exception_model_name=sjlj 3074 ;; 3075 no) 3076 ac_exception_model_name="call frame" 3077 ;; 3078 *) 3079 AC_MSG_ERROR([unable to detect exception model]) 3080 ;; 3081 esac 3082 AC_LANG_RESTORE 3083 AC_MSG_RESULT($ac_exception_model_name) 3084]) 3085 3086 3087dnl 3088dnl Allow visibility attributes to be used on namespaces, objects, etc. 3089dnl 3090dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes. 3091dnl --disable-libstdcxx-visibility turns off all use of visibility attributes. 3092dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)] 3093dnl Where DEFAULT is 'yes'. 3094dnl 3095AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [ 3096GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage]) 3097 3098if test x$enable_libstdcxx_visibility = xyes ; then 3099 dnl all hail libgfortran 3100 dnl Check whether the target supports hidden visibility. 3101 AC_CACHE_CHECK([whether the target supports hidden visibility], 3102 glibcxx_cv_have_attribute_visibility, [ 3103 save_CFLAGS="$CFLAGS" 3104 CFLAGS="$CFLAGS -Werror" 3105 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }], 3106 [], glibcxx_cv_have_attribute_visibility=yes, 3107 glibcxx_cv_have_attribute_visibility=no) 3108 CFLAGS="$save_CFLAGS"]) 3109 if test $glibcxx_cv_have_attribute_visibility = no; then 3110 enable_libstdcxx_visibility=no 3111 fi 3112fi 3113 3114GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes) 3115AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility]) 3116]) 3117 3118 3119dnl 3120dnl Add version tags to symbols in shared library (or not), additionally 3121dnl marking other symbols as private/local (or not). 3122dnl 3123dnl Sets libtool_VERSION, and determines shared library SONAME. 3124dnl 3125dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no. 3126dnl 3127dnl --enable-symvers=style adds a version script to the linker call when 3128dnl creating the shared library. The choice of version script is 3129dnl controlled by 'style'. 3130dnl --disable-symvers does not. 3131dnl 3132dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)] 3133dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to 3134dnl choose a default style based on linker characteristics. Passing 3135dnl 'no' disables versioning. 3136dnl 3137AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [ 3138 3139GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]], 3140 [enables symbol versioning of the shared library], 3141 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun]) 3142 3143# If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we 3144# don't know enough about $LD to do tricks... 3145AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES]) 3146# Sun style symbol versions needs GNU c++filt for make_sunver.pl to work 3147# with extern "C++" in version scripts. 3148AC_REQUIRE([GCC_PROG_GNU_CXXFILT]) 3149 3150# Turn a 'yes' into a suitable default. 3151if test x$enable_symvers = xyes ; then 3152 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then 3153 enable_symvers=no 3154 else 3155 if test $with_gnu_ld = yes ; then 3156 case ${target_os} in 3157 hpux*) 3158 enable_symvers=no ;; 3159 *) 3160 enable_symvers=gnu ;; 3161 esac 3162 else 3163 case ${target_os} in 3164 darwin*) 3165 enable_symvers=darwin ;; 3166 # Sun symbol versioning exists since Solaris 2.5. 3167 solaris2.[[5-9]]* | solaris2.1[[0-9]]*) 3168 # make_sunver.pl needs GNU c++filt to support extern "C++" in 3169 # version scripts, so disable symbol versioning if none can be 3170 # found. 3171 if test -z "$ac_cv_path_CXXFILT"; then 3172 AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) 3173 AC_MSG_WARN([=== no GNU c++filt could be found.]) 3174 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3175 enable_symvers=no 3176 else 3177 enable_symvers=sun 3178 fi 3179 ;; 3180 *) 3181 enable_symvers=no ;; 3182 esac 3183 fi 3184 fi 3185fi 3186 3187# Check to see if 'darwin' or 'darwin-export' can win. 3188if test x$enable_symvers = xdarwin-export ; then 3189 enable_symvers=darwin 3190fi 3191 3192# Check if 'sun' was requested on non-Solaris 2 platforms. 3193if test x$enable_symvers = xsun ; then 3194 case ${target_os} in 3195 solaris2*) 3196 # All fine. 3197 ;; 3198 *) 3199 # Unlikely to work. 3200 AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) 3201 AC_MSG_WARN([=== you are not targetting Solaris 2.]) 3202 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3203 enable_symvers=no 3204 ;; 3205 esac 3206fi 3207 3208# Check to see if 'gnu' can win. 3209if test $enable_symvers = gnu || 3210 test $enable_symvers = gnu-versioned-namespace || 3211 test $enable_symvers = sun; then 3212 # Check to see if libgcc_s exists, indicating that shared libgcc is possible. 3213 AC_MSG_CHECKING([for shared libgcc]) 3214 ac_save_CFLAGS="$CFLAGS" 3215 CFLAGS=' -lgcc_s' 3216 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no) 3217 CFLAGS="$ac_save_CFLAGS" 3218 if test $glibcxx_shared_libgcc = no; then 3219 cat > conftest.c <<EOF 3220int main (void) { return 0; } 3221EOF 3222changequote(,)dnl 3223 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ 3224 -shared -shared-libgcc -o conftest.so \ 3225 conftest.c -v 2>&1 >/dev/null \ 3226 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` 3227changequote([,])dnl 3228 rm -f conftest.c conftest.so 3229 if test x${glibcxx_libgcc_s_suffix+set} = xset; then 3230 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix" 3231 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes) 3232 CFLAGS="$ac_save_CFLAGS" 3233 fi 3234 fi 3235 AC_MSG_RESULT($glibcxx_shared_libgcc) 3236 3237 # For GNU ld, we need at least this version. The format is described in 3238 # GLIBCXX_CHECK_LINKER_FEATURES above. 3239 glibcxx_min_gnu_ld_version=21400 3240 3241 # If no shared libgcc, can't win. 3242 if test $glibcxx_shared_libgcc != yes; then 3243 AC_MSG_WARN([=== You have requested GNU symbol versioning, but]) 3244 AC_MSG_WARN([=== you are not building a shared libgcc_s.]) 3245 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3246 enable_symvers=no 3247 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then 3248 : All interesting versions of Sun ld support sun style symbol versioning. 3249 elif test $with_gnu_ld != yes ; then 3250 # just fail for now 3251 AC_MSG_WARN([=== You have requested GNU symbol versioning, but]) 3252 AC_MSG_WARN([=== you are not using the GNU linker.]) 3253 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3254 enable_symvers=no 3255 elif test $glibcxx_ld_is_gold = yes ; then 3256 : All versions of gold support symbol versioning. 3257 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then 3258 # The right tools, the right setup, but too old. Fallbacks? 3259 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for) 3260 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.) 3261 AC_MSG_WARN(=== You would need to upgrade your binutils to version) 3262 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.) 3263 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3264 enable_symvers=no 3265 fi 3266fi 3267 3268# For libtool versioning info, format is CURRENT:REVISION:AGE 3269libtool_VERSION=6:19:0 3270 3271# Everything parsed; figure out what files and settings to use. 3272case $enable_symvers in 3273 no) 3274 SYMVER_FILE=config/abi/pre/none.ver 3275 ;; 3276 gnu) 3277 SYMVER_FILE=config/abi/pre/gnu.ver 3278 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1, 3279 [Define to use GNU versioning in the shared library.]) 3280 ;; 3281 gnu-versioned-namespace) 3282 libtool_VERSION=7:0:0 3283 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver 3284 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1, 3285 [Define to use GNU namespace versioning in the shared library.]) 3286 ;; 3287 darwin) 3288 SYMVER_FILE=config/abi/pre/gnu.ver 3289 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1, 3290 [Define to use darwin versioning in the shared library.]) 3291 ;; 3292 sun) 3293 SYMVER_FILE=config/abi/pre/gnu.ver 3294 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1, 3295 [Define to use Sun versioning in the shared library.]) 3296 ;; 3297esac 3298 3299if test x$enable_symvers != xno ; then 3300 AC_DEFINE(_GLIBCXX_SYMVER, 1, 3301 [Define to use symbol versioning in the shared library.]) 3302fi 3303 3304AC_CACHE_CHECK([whether the target supports .symver directive], 3305 glibcxx_cv_have_as_symver_directive, [ 3306 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");], 3307 [], glibcxx_cv_have_as_symver_directive=yes, 3308 glibcxx_cv_have_as_symver_directive=no)]) 3309if test $glibcxx_cv_have_as_symver_directive = yes; then 3310 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1, 3311 [Define to 1 if the target assembler supports .symver directive.]) 3312fi 3313 3314AC_SUBST(SYMVER_FILE) 3315AC_SUBST(port_specific_symbol_files) 3316GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no) 3317GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu) 3318GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace) 3319GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin) 3320GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun) 3321AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers) 3322 3323if test $enable_symvers != no ; then 3324 case ${target_os} in 3325 # The Solaris 2 runtime linker doesn't support the GNU extension of 3326 # binding the same symbol to different versions 3327 solaris2*) 3328 ;; 3329 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do. 3330 *) 3331 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1, 3332 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.]) 3333 ;; 3334 esac 3335fi 3336 3337# Now, set up compatibility support, if any. 3338# In addition, need this to deal with std::size_t mangling in 3339# src/compatibility.cc. In a perfect world, could use 3340# typeid(std::size_t).name()[0] to do direct substitution. 3341AC_MSG_CHECKING([for size_t as unsigned int]) 3342ac_save_CFLAGS="$CFLAGS" 3343CFLAGS="-Werror" 3344AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;], 3345 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no]) 3346CFLAGS=$ac_save_CFLAGS 3347if test "$glibcxx_size_t_is_i" = yes; then 3348 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.]) 3349fi 3350AC_MSG_RESULT([$glibcxx_size_t_is_i]) 3351 3352AC_MSG_CHECKING([for ptrdiff_t as int]) 3353ac_save_CFLAGS="$CFLAGS" 3354CFLAGS="-Werror" 3355AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;], 3356 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no]) 3357CFLAGS=$ac_save_CFLAGS 3358if test "$glibcxx_ptrdiff_t_is_i" = yes; then 3359 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.]) 3360fi 3361AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i]) 3362]) 3363 3364 3365dnl 3366dnl Setup to use the gcc gthr.h thread-specific memory and mutex model. 3367dnl We must stage the required headers so that they will be installed 3368dnl with the library (unlike libgcc, the STL implementation is provided 3369dnl solely within headers). Since we must not inject random user-space 3370dnl macro names into user-provided C++ code, we first stage into <file>-in 3371dnl and process to <file> with an output command. The reason for a two- 3372dnl stage process here is to correctly handle $srcdir!=$objdir without 3373dnl having to write complex code (the sed commands to clean the macro 3374dnl namespace are complex and fragile enough as it is). We must also 3375dnl add a relative path so that -I- is supported properly. 3376dnl 3377dnl Substs: 3378dnl thread_header 3379dnl 3380AC_DEFUN([GLIBCXX_ENABLE_THREADS], [ 3381 AC_MSG_CHECKING([for thread model used by GCC]) 3382 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` 3383 AC_MSG_RESULT([$target_thread_file]) 3384 GCC_AC_THREAD_HEADER([$target_thread_file]) 3385]) 3386 3387 3388dnl 3389dnl Check if gthread implementation defines the types and functions 3390dnl required by the c++0x thread library. Conforming gthread 3391dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x. 3392dnl 3393dnl GLIBCXX_ENABLE_SYMVERS must be done before this. 3394dnl 3395AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [ 3396 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support]) 3397 3398 if test x$enable_libstdcxx_threads = xauto || 3399 test x$enable_libstdcxx_threads = xyes; then 3400 3401 AC_LANG_SAVE 3402 AC_LANG_CPLUSPLUS 3403 3404 ac_save_CXXFLAGS="$CXXFLAGS" 3405 CXXFLAGS="$CXXFLAGS -fno-exceptions \ 3406 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc" 3407 3408 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` 3409 case $target_thread_file in 3410 posix) 3411 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS" 3412 esac 3413 3414 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available]) 3415 3416 AC_TRY_COMPILE([#include <unistd.h>], 3417 [ 3418 // In case of POSIX threads check _POSIX_TIMEOUTS. 3419 #if (defined(_PTHREADS) \ 3420 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0)) 3421 #error 3422 #endif 3423 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0]) 3424 3425 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock, 3426 [Define to 1 if mutex_timedlock is available.]) 3427 3428 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ; 3429 else res_mutex_timedlock=no ; fi 3430 AC_MSG_RESULT([$res_mutex_timedlock]) 3431 3432 AC_MSG_CHECKING([for gthreads library]) 3433 3434 AC_TRY_COMPILE([#include "gthr.h"], 3435 [ 3436 #ifndef __GTHREADS_CXX0X 3437 #error 3438 #endif 3439 ], [case $target_os in 3440 # gthreads support breaks symbol versioning on Solaris 9 (PR 3441 # libstdc++/52189). 3442 solaris2.9*) 3443 if test x$enable_symvers = xno; then 3444 ac_has_gthreads=yes 3445 elif test x$enable_libstdcxx_threads = xyes; then 3446 AC_MSG_WARN([You have requested C++11 threads support, but]) 3447 AC_MSG_WARN([this breaks symbol versioning.]) 3448 ac_has_gthreads=yes 3449 else 3450 ac_has_gthreads=no 3451 fi 3452 ;; 3453 *) 3454 ac_has_gthreads=yes 3455 ;; 3456 esac], 3457 [ac_has_gthreads=no]) 3458 else 3459 ac_has_gthreads=no 3460 fi 3461 3462 AC_MSG_RESULT([$ac_has_gthreads]) 3463 3464 if test x"$ac_has_gthreads" = x"yes"; then 3465 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1, 3466 [Define if gthreads library is available.]) 3467 fi 3468 3469 CXXFLAGS="$ac_save_CXXFLAGS" 3470 AC_LANG_RESTORE 3471]) 3472 3473 3474# Check whether LC_MESSAGES is available in <locale.h>. 3475# Ulrich Drepper <drepper@cygnus.com>, 1995. 3476# 3477# This file file be copied and used freely without restrictions. It can 3478# be used in projects which are not available under the GNU Public License 3479# but which still want to provide support for the GNU gettext functionality. 3480# Please note that the actual code is *not* freely available. 3481AC_DEFUN([AC_LC_MESSAGES], [ 3482 AC_CHECK_HEADER(locale.h, [ 3483 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES, 3484 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES], 3485 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)]) 3486 if test $ac_cv_val_LC_MESSAGES = yes; then 3487 AC_DEFINE(HAVE_LC_MESSAGES, 1, 3488 [Define if LC_MESSAGES is available in <locale.h>.]) 3489 fi 3490 ]) 3491]) 3492 3493dnl 3494dnl Check whether rdrand is supported in the assembler. 3495AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [ 3496 AC_MSG_CHECKING([for rdrand support in assembler]) 3497 AC_CACHE_VAL(ac_cv_x86_rdrand, [ 3498 ac_cv_x86_rdrand=no 3499 case "$target" in 3500 i?86-*-* | \ 3501 x86_64-*-*) 3502 AC_TRY_COMPILE(, [asm("rdrand %eax");], 3503 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no]) 3504 esac 3505 ]) 3506 if test $ac_cv_x86_rdrand = yes; then 3507 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1, 3508 [ Defined if as can handle rdrand. ]) 3509 fi 3510 AC_MSG_RESULT($ac_cv_x86_rdrand) 3511]) 3512 3513dnl 3514dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS. 3515dnl 3516AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [ 3517 3518 AC_LANG_SAVE 3519 AC_LANG_CPLUSPLUS 3520 ac_save_CXXFLAGS="$CXXFLAGS" 3521 CXXFLAGS="$CXXFLAGS -fno-exceptions" 3522 3523 AC_MSG_CHECKING([for get_nprocs]) 3524 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [ 3525 GCC_TRY_COMPILE_OR_LINK( 3526 [#include <sys/sysinfo.h>], 3527 [int n = get_nprocs();], 3528 [glibcxx_cv_GET_NPROCS=yes], 3529 [glibcxx_cv_GET_NPROCS=no]) 3530 ]) 3531 if test $glibcxx_cv_GET_NPROCS = yes; then 3532 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.]) 3533 fi 3534 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS) 3535 3536 CXXFLAGS="$ac_save_CXXFLAGS" 3537 AC_LANG_RESTORE 3538]) 3539 3540dnl 3541dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN. 3542dnl 3543AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [ 3544 3545 AC_LANG_SAVE 3546 AC_LANG_CPLUSPLUS 3547 ac_save_CXXFLAGS="$CXXFLAGS" 3548 CXXFLAGS="$CXXFLAGS -fno-exceptions" 3549 3550 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN]) 3551 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [ 3552 GCC_TRY_COMPILE_OR_LINK( 3553 [#include <unistd.h>], 3554 [int n = sysconf(_SC_NPROCESSORS_ONLN);], 3555 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes], 3556 [glibcxx_cv_SC_NPROCESSORS_ONLN=no]) 3557 ]) 3558 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then 3559 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.]) 3560 fi 3561 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN) 3562 3563 CXXFLAGS="$ac_save_CXXFLAGS" 3564 AC_LANG_RESTORE 3565]) 3566 3567dnl 3568dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN. 3569dnl 3570AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [ 3571 3572 AC_LANG_SAVE 3573 AC_LANG_CPLUSPLUS 3574 ac_save_CXXFLAGS="$CXXFLAGS" 3575 CXXFLAGS="$CXXFLAGS -fno-exceptions" 3576 3577 AC_MSG_CHECKING([for _SC_NPROC_ONLN]) 3578 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [ 3579 GCC_TRY_COMPILE_OR_LINK( 3580 [#include <unistd.h>], 3581 [int n = sysconf(_SC_NPROC_ONLN);], 3582 [glibcxx_cv_SC_NPROC_ONLN=yes], 3583 [glibcxx_cv_SC_NPROC_ONLN=no]) 3584 ]) 3585 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then 3586 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.]) 3587 fi 3588 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN) 3589 3590 CXXFLAGS="$ac_save_CXXFLAGS" 3591 AC_LANG_RESTORE 3592]) 3593 3594dnl 3595dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP. 3596dnl 3597AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [ 3598 3599 AC_LANG_SAVE 3600 AC_LANG_CPLUSPLUS 3601 ac_save_CXXFLAGS="$CXXFLAGS" 3602 CXXFLAGS="$CXXFLAGS -fno-exceptions" 3603 3604 AC_MSG_CHECKING([for pthreads_num_processors_np]) 3605 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [ 3606 GCC_TRY_COMPILE_OR_LINK( 3607 [#include <pthread.h>], 3608 [int n = pthread_num_processors_np();], 3609 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes], 3610 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no]) 3611 ]) 3612 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then 3613 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.]) 3614 fi 3615 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP) 3616 3617 CXXFLAGS="$ac_save_CXXFLAGS" 3618 AC_LANG_RESTORE 3619]) 3620 3621dnl 3622dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU. 3623dnl 3624AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [ 3625 3626 AC_LANG_SAVE 3627 AC_LANG_CPLUSPLUS 3628 ac_save_CXXFLAGS="$CXXFLAGS" 3629 CXXFLAGS="$CXXFLAGS -fno-exceptions" 3630 3631 AC_MSG_CHECKING([for hw.ncpu sysctl]) 3632 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [ 3633 GCC_TRY_COMPILE_OR_LINK( 3634 [ 3635 #include <stddef.h> 3636 #include <sys/sysctl.h> 3637 ], 3638 [ 3639 int count; 3640 size_t size = sizeof(count); 3641 int mib[] = { CTL_HW, HW_NCPU }; 3642 sysctl(mib, 2, &count, &size, NULL, 0); 3643 ], 3644 [glibcxx_cv_SYSCTL_HW_NCPU=yes], 3645 [glibcxx_cv_SYSCTL_HW_NCPU=no]) 3646 ]) 3647 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then 3648 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.]) 3649 fi 3650 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU) 3651 3652 CXXFLAGS="$ac_save_CXXFLAGS" 3653 AC_LANG_RESTORE 3654]) 3655 3656dnl 3657dnl Check to see if python pretty printing can be activated. 3658dnl 3659dnl --with-python-dir=dir 3660dnl installs directory into $prefix/dir 3661AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [ 3662 3663AC_MSG_CHECKING([for custom python install directory]) 3664AC_ARG_WITH([python-dir], 3665 AS_HELP_STRING([--with-python-dir], 3666 [the location to install Python modules. This path is relative starting from the prefix.]), 3667 [with_python_dir=$withval], [with_python_dir="no"]) 3668AC_MSG_RESULT(${with_python_dir}) 3669 3670# Needed for installing Python modules during make install. 3671python_mod_dir="${with_python_dir}" 3672AC_SUBST(python_mod_dir) 3673GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no) 3674]) 3675 3676dnl 3677dnl Check to see if -Werror is disabled. 3678dnl 3679dnl --enable-werror/--disable-werror 3680AC_DEFUN([GLIBCXX_ENABLE_WERROR], [ 3681 AC_MSG_CHECKING([for -Werror]) 3682 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror]) 3683 AC_MSG_RESULT($enable_werror) 3684 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes) 3685]) 3686 3687 3688dnl 3689dnl Check to see if sys/sdt.h exists and that it is suitable for use. 3690dnl Some versions of sdt.h were not compatible with C++11. 3691dnl 3692AC_DEFUN([GLIBCXX_CHECK_SDT_H], [ 3693 AC_MSG_RESULT([for suitable sys/sdt.h]) 3694 # Note that this test has to be run with the C language. 3695 # Otherwise, sdt.h will try to include some headers from 3696 # libstdc++ itself. 3697 AC_LANG_SAVE 3698 AC_LANG_C 3699 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [ 3700 # Because we have to run the test in C, we use grep rather 3701 # than the compiler to check for the bug. The bug is that 3702 # were strings without trailing whitespace, causing g++ 3703 # to look for operator"". The pattern searches for the fixed 3704 # output. 3705 AC_EGREP_CPP([ \",\" ], [ 3706 #include <sys/sdt.h> 3707 int f() { STAP_PROBE(hi, bob); } 3708 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no]) 3709 ]) 3710 AC_LANG_RESTORE 3711 if test $glibcxx_cv_sys_sdt_h = yes; then 3712 AC_DEFINE(HAVE_SYS_SDT_H, 1, 3713 [Define to 1 if you have a suitable <sys/sdt.h> header file]) 3714 fi 3715 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h) 3716]) 3717 3718# Macros from the top-level gcc directory. 3719m4_include([../config/gc++filt.m4]) 3720m4_include([../config/tls.m4]) 3721m4_include([../config/gthr.m4]) 3722