1dnl 2dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST) 3dnl 4dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the 5dnl end of configure. This lets tested variables be reassigned, and the 6dnl conditional will depend on the final state of the variable. For a simple 7dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED. 8dnl 9m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl 10AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl 11 m4_divert_text([glibcxx_diversion],dnl 12 AM_CONDITIONAL([$1],[$2]) 13 )dnl 14])dnl 15AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl 16 17 18dnl 19dnl Check to see what architecture and operating system we are compiling 20dnl for. Also, if architecture- or OS-specific flags are required for 21dnl compilation, pick them up here. 22dnl 23AC_DEFUN([GLIBCXX_CHECK_HOST], [ 24 . $glibcxx_srcdir/configure.host 25 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir]) 26 AC_MSG_NOTICE([OS config directory is $os_include_dir]) 27]) 28 29dnl 30dnl Initialize the rest of the library configury. At this point we have 31dnl variables like $host. 32dnl 33dnl Sets: 34dnl SUBDIRS 35dnl Substs: 36dnl glibcxx_builddir (absolute path) 37dnl glibcxx_srcdir (absolute path) 38dnl toplevel_builddir (absolute path) 39dnl toplevel_srcdir (absolute path) 40dnl with_cross_host 41dnl with_newlib 42dnl with_target_subdir 43dnl plus 44dnl - the variables in GLIBCXX_CHECK_HOST / configure.host 45dnl - default settings for all AM_CONFITIONAL test variables 46dnl - lots of tools, like CC and CXX 47dnl 48AC_DEFUN([GLIBCXX_CONFIGURE], [ 49 # Keep these sync'd with the list in Makefile.am. The first provides an 50 # expandable list at autoconf time; the second provides an expandable list 51 # (i.e., shell variable) at configure time. 52 m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/filesystem doc python]) 53 SUBDIRS='glibcxx_SUBDIRS' 54 55 # These need to be absolute paths, yet at the same time need to 56 # canonicalize only relative paths, because then amd will not unmount 57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd. 58 glibcxx_builddir=`${PWDCMD-pwd}` 59 case $srcdir in 60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;; 61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;; 62 esac 63 toplevel_builddir=${glibcxx_builddir}/.. 64 toplevel_srcdir=${glibcxx_srcdir}/.. 65 AC_SUBST(glibcxx_builddir) 66 AC_SUBST(glibcxx_srcdir) 67 AC_SUBST(toplevel_builddir) 68 AC_SUBST(toplevel_srcdir) 69 70 # We use these options to decide which functions to include. They are 71 # set from the top level. 72 AC_ARG_WITH([target-subdir], 73 AC_HELP_STRING([--with-target-subdir=SUBDIR], 74 [configuring in a subdirectory])) 75 76 AC_ARG_WITH([cross-host], 77 AC_HELP_STRING([--with-cross-host=HOST], 78 [configuring with a cross compiler])) 79 80 AC_ARG_WITH([newlib], 81 AC_HELP_STRING([--with-newlib], 82 [assume newlib as a system C library])) 83 84 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't 85 # available). Uncomment the next line to force a particular method. 86 AC_PROG_LN_S 87 #LN_S='cp -p' 88 89 AC_CHECK_TOOL(AS, as) 90 AC_CHECK_TOOL(AR, ar) 91 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) 92 93 AM_MAINTAINER_MODE 94 95 # Set up safe default values for all subsequent AM_CONDITIONAL tests 96 # which are themselves conditionally expanded. 97 ## (Right now, this only matters for enable_wchar_t, but nothing prevents 98 ## other macros from doing the same. This should be automated.) -pme 99 100 # Check for C library flavor since GNU/Linux platforms use different 101 # configuration directories depending on the C library in use. 102 AC_EGREP_CPP([_using_uclibc], [ 103 #include <stdio.h> 104 #if __UCLIBC__ 105 _using_uclibc 106 #endif 107 ], uclibc=yes, uclibc=no) 108 109 AC_EGREP_CPP([_using_bionic], [ 110 #include <stdio.h> 111 #if __BIONIC__ 112 _using_bionic 113 #endif 114 ], bionic=yes, bionic=no) 115 116 # Find platform-specific directories containing configuration info. 117 # Also possibly modify flags used elsewhere, as needed by the platform. 118 GLIBCXX_CHECK_HOST 119]) 120 121 122dnl 123dnl Tests for newer compiler features, or features that are present in newer 124dnl compiler versions but not older compiler versions still in use, should 125dnl be placed here. 126dnl 127dnl Defines: 128dnl WERROR='-Werror' if requested and possible; g++'s that lack the 129dnl new inlining code or the new system_header pragma will die on -Werror. 130dnl Leave it out by default and use maint-mode to use it. 131dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if 132dnl compiler supports it and the user has not requested debug mode. 133dnl 134AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [ 135 # All these tests are for C++; save the language and the compiler flags. 136 # The CXXFLAGS thing is suspicious, but based on similar bits previously 137 # found in GLIBCXX_CONFIGURE. 138 AC_LANG_SAVE 139 AC_LANG_CPLUSPLUS 140 ac_test_CXXFLAGS="${CXXFLAGS+set}" 141 ac_save_CXXFLAGS="$CXXFLAGS" 142 143 # Check for 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 manual/appendix_porting.html#appendix.porting.build_hacking for 875dnl documentation. 876dnl 877m4_define([GLIBCXX_ENABLE],[dnl 878m4_define([_g_switch],[--enable-$1])dnl 879m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl 880 AC_ARG_ENABLE([$1],m4_dquote(_g_help), 881 m4_bmatch([$5], 882 [^permit ], 883 [[ 884 case "$enableval" in 885 m4_bpatsubst([$5],[permit ])) ;; 886 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; 887 dnl Idea for future: generate a URL pointing to 888 dnl "onlinedocs/configopts.html#whatever" 889 esac 890 ]], 891 [^$], 892 [[ 893 case "$enableval" in 894 yes|no) ;; 895 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; 896 esac 897 ]], 898 [[$5]]), 899 [enable_]m4_bpatsubst([$1],-,_)[=][$2]) 900m4_undefine([_g_switch])dnl 901m4_undefine([_g_help])dnl 902]) 903 904 905dnl 906dnl Check for ISO/IEC 9899:1999 "C99" support. 907dnl 908dnl --enable-c99 defines _GLIBCXX_USE_C99 909dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined 910dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)] 911dnl Where DEFAULT is either `yes' or `no'. 912dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'. 913dnl 914AC_DEFUN([GLIBCXX_ENABLE_C99], [ 915 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support]) 916 917 if test x"$enable_c99" = x"yes"; then 918 AC_LANG_SAVE 919 AC_LANG_CPLUSPLUS 920 921 # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__ 922 # undefined may cause fake C99 facilities, like pre-standard snprintf, 923 # to be spuriously enabled. 924 ac_save_CXXFLAGS="$CXXFLAGS" 925 CXXFLAGS="$CXXFLAGS -std=c++98" 926 ac_save_LIBS="$LIBS" 927 ac_save_gcc_no_link="$gcc_no_link" 928 929 if test x$gcc_no_link != xyes; then 930 # Use -fno-exceptions to that the C driver can link these tests without 931 # hitting undefined references to personality routines. 932 CXXFLAGS="$CXXFLAGS -fno-exceptions" 933 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [ 934 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK 935 gcc_no_link=yes 936 ]) 937 fi 938 939 # Check for the existence of <math.h> functions used if C99 is enabled. 940 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++98]) 941 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx98, [ 942 GCC_TRY_COMPILE_OR_LINK( 943 [#include <math.h> 944 volatile double d1, d2; 945 volatile int i;], 946 [i = fpclassify(d1); 947 i = isfinite(d1); 948 i = isinf(d1); 949 i = isnan(d1); 950 i = isnormal(d1); 951 i = signbit(d1); 952 i = isgreater(d1, d2); 953 i = isgreaterequal(d1, d2); 954 i = isless(d1, d2); 955 i = islessequal(d1, d2); 956 i = islessgreater(d1, d2); 957 i = islessgreater(d1, d2); 958 i = isunordered(d1, d2); 959 ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no]) 960 ]) 961 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx98) 962 if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then 963 AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1, 964 [Define if C99 functions or macros in <math.h> should be imported 965 in <cmath> in namespace std for C++98.]) 966 fi 967 968 # Check for the existence of <complex.h> complex math functions. 969 # This is necessary even though libstdc++ uses the builtin versions 970 # of these functions, because if the builtin cannot be used, a reference 971 # to the library function is emitted. 972 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no) 973 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 974 if test x"$ac_has_complex_h" = x"yes"; then 975 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++98]) 976 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx98, [ 977 GCC_TRY_COMPILE_OR_LINK( 978 [#include <complex.h> 979 typedef __complex__ float float_type; 980 typedef __complex__ double double_type; 981 typedef __complex__ long double ld_type; 982 volatile float_type tmpf; 983 volatile double_type tmpd; 984 volatile ld_type tmpld; 985 volatile float f; 986 volatile double d; 987 volatile long double ld;], 988 [f = cabsf(tmpf); 989 f = cargf(tmpf); 990 tmpf = ccosf(tmpf); 991 tmpf = ccoshf(tmpf); 992 tmpf = cexpf(tmpf); 993 tmpf = clogf(tmpf); 994 tmpf = csinf(tmpf); 995 tmpf = csinhf(tmpf); 996 tmpf = csqrtf(tmpf); 997 tmpf = ctanf(tmpf); 998 tmpf = ctanhf(tmpf); 999 tmpf = cpowf(tmpf, tmpf); 1000 tmpf = cprojf(tmpf); 1001 d = cabs(tmpd); 1002 d = carg(tmpd); 1003 tmpd = ccos(tmpd); 1004 tmpd = ccosh(tmpd); 1005 tmpd = cexp(tmpd); 1006 tmpd = clog(tmpd); 1007 tmpd = csin(tmpd); 1008 tmpd = csinh(tmpd); 1009 tmpd = csqrt(tmpd); 1010 tmpd = ctan(tmpd); 1011 tmpd = ctanh(tmpd); 1012 tmpd = cpow(tmpd, tmpd); 1013 tmpd = cproj(tmpd); 1014 ld = cabsl(tmpld); 1015 ld = cargl(tmpld); 1016 tmpld = ccosl(tmpld); 1017 tmpld = ccoshl(tmpld); 1018 tmpld = cexpl(tmpld); 1019 tmpld = clogl(tmpld); 1020 tmpld = csinl(tmpld); 1021 tmpld = csinhl(tmpld); 1022 tmpld = csqrtl(tmpld); 1023 tmpld = ctanl(tmpld); 1024 tmpld = ctanhl(tmpld); 1025 tmpld = cpowl(tmpld, tmpld); 1026 tmpld = cprojl(tmpld); 1027 ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no]) 1028 ]) 1029 fi 1030 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx98) 1031 if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then 1032 AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1, 1033 [Define if C99 functions in <complex.h> should be used in 1034 <complex> for C++98. Using compiler builtins for these functions 1035 requires corresponding C99 library functions to be present.]) 1036 fi 1037 1038 # Check for the existence in <stdio.h> of vscanf, et. al. 1039 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++98]) 1040 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx98, [ 1041 GCC_TRY_COMPILE_OR_LINK( 1042 [#include <stdio.h> 1043 #include <stdarg.h> 1044 void foo(char* fmt, ...) 1045 { 1046 va_list args; va_start(args, fmt); 1047 vfscanf(stderr, "%i", args); 1048 vscanf("%i", args); 1049 vsnprintf(fmt, 0, "%i", args); 1050 vsscanf(fmt, "%i", args); 1051 snprintf(fmt, 0, "%i"); 1052 }], [], 1053 [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no]) 1054 ]) 1055 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx98) 1056 if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then 1057 AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1, 1058 [Define if C99 functions or macros in <stdio.h> should be imported 1059 in <cstdio> in namespace std for C++98.]) 1060 fi 1061 1062 # Check for the existence in <stdlib.h> of lldiv_t, et. al. 1063 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++98]) 1064 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx98, [ 1065 GCC_TRY_COMPILE_OR_LINK( 1066 [#include <stdlib.h> 1067 volatile float f; 1068 volatile long double ld; 1069 volatile unsigned long long ll; 1070 lldiv_t mydivt;], 1071 [char* tmp; 1072 f = strtof("gnu", &tmp); 1073 ld = strtold("gnu", &tmp); 1074 ll = strtoll("gnu", &tmp, 10); 1075 ll = strtoull("gnu", &tmp, 10); 1076 ll = llabs(10); 1077 mydivt = lldiv(10,1); 1078 ll = mydivt.quot; 1079 ll = mydivt.rem; 1080 ll = atoll("10"); 1081 _Exit(0); 1082 ], [glibcxx_cv_c99_stdlib_cxx98=yes], [glibcxx_cv_c99_stdlib_cxx98=no]) 1083 ]) 1084 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx98) 1085 if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then 1086 AC_DEFINE(_GLIBCXX98_USE_C99_STDLIB, 1, 1087 [Define if C99 functions or macros in <stdlib.h> should be imported 1088 in <cstdlib> in namespace std for C++98.]) 1089 fi 1090 1091 # Check for the existence in <wchar.h> of wcstold, etc. 1092 if test x"$ac_has_wchar_h" = xyes && 1093 test x"$ac_has_wctype_h" = xyes; then 1094 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++98]) 1095 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx98, [ 1096 AC_TRY_COMPILE([#include <wchar.h> 1097 namespace test 1098 { 1099 using ::wcstold; 1100 using ::wcstoll; 1101 using ::wcstoull; 1102 } 1103 ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no]) 1104 ]) 1105 1106 # Checks for wide character functions that may not be present. 1107 # Injection of these is wrapped with guard macros. 1108 # NB: only put functions here, instead of immediately above, if 1109 # absolutely necessary. 1110 AC_TRY_COMPILE([#include <wchar.h> 1111 namespace test { using ::vfwscanf; }], [], 1112 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], []) 1113 1114 AC_TRY_COMPILE([#include <wchar.h> 1115 namespace test { using ::vswscanf; }], [], 1116 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], []) 1117 1118 AC_TRY_COMPILE([#include <wchar.h> 1119 namespace test { using ::vwscanf; }], [], 1120 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], []) 1121 1122 AC_TRY_COMPILE([#include <wchar.h> 1123 namespace test { using ::wcstof; }], [], 1124 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], []) 1125 1126 AC_TRY_COMPILE([#include <wctype.h>], 1127 [wint_t t; int i = iswblank(t);], 1128 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], []) 1129 1130 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx98) 1131 if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then 1132 AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1, 1133 [Define if C99 functions or macros in <wchar.h> should be imported 1134 in <cwchar> in namespace std for C++98.]) 1135 fi 1136 fi 1137 1138 # Option parsed, now set things appropriately. 1139 if test x"$glibcxx_cv_c99_math_cxx98" = x"no" || 1140 test x"$glibcxx_cv_c99_complex_cxx98" = x"no" || 1141 test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" || 1142 test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" || 1143 test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then 1144 enable_c99=no; 1145 else 1146 AC_DEFINE(_GLIBCXX_USE_C99, 1, 1147 [Define if C99 functions or macros from <wchar.h>, <math.h>, 1148 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.]) 1149 fi 1150 1151 gcc_no_link="$ac_save_gcc_no_link" 1152 LIBS="$ac_save_LIBS" 1153 CXXFLAGS="$ac_save_CXXFLAGS" 1154 AC_LANG_RESTORE 1155 1156 AC_LANG_SAVE 1157 AC_LANG_CPLUSPLUS 1158 1159 # Use -std=c++11 and test again for C99 library feature in C++11 mode. 1160 # For the reasons given above we use -std=c++11 not -std=gnu++11. 1161 ac_save_CXXFLAGS="$CXXFLAGS" 1162 CXXFLAGS="$CXXFLAGS -std=c++11" 1163 ac_save_LIBS="$LIBS" 1164 ac_save_gcc_no_link="$gcc_no_link" 1165 1166 if test x$gcc_no_link != xyes; then 1167 # Use -fno-exceptions to that the C driver can link these tests without 1168 # hitting undefined references to personality routines. 1169 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1170 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [ 1171 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK 1172 gcc_no_link=yes 1173 ]) 1174 fi 1175 1176 # Check for the existence of <math.h> functions used if C99 is enabled. 1177 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++11]) 1178 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx11, [ 1179 GCC_TRY_COMPILE_OR_LINK( 1180 [#include <math.h> 1181 volatile double d1, d2; 1182 volatile int i;], 1183 [i = fpclassify(d1); 1184 i = isfinite(d1); 1185 i = isinf(d1); 1186 i = isnan(d1); 1187 i = isnormal(d1); 1188 i = signbit(d1); 1189 i = isgreater(d1, d2); 1190 i = isgreaterequal(d1, d2); 1191 i = isless(d1, d2); 1192 i = islessequal(d1, d2); 1193 i = islessgreater(d1, d2); 1194 i = islessgreater(d1, d2); 1195 i = isunordered(d1, d2); 1196 ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no]) 1197 ]) 1198 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx11) 1199 if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then 1200 AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1, 1201 [Define if C99 functions or macros in <math.h> should be imported 1202 in <cmath> in namespace std for C++11.]) 1203 fi 1204 1205 # Check for the existence of <complex.h> complex math functions. 1206 # This is necessary even though libstdc++ uses the builtin versions 1207 # of these functions, because if the builtin cannot be used, a reference 1208 # to the library function is emitted. 1209 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no) 1210 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 1211 if test x"$ac_has_complex_h" = x"yes"; then 1212 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++11]) 1213 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx11, [ 1214 GCC_TRY_COMPILE_OR_LINK( 1215 [#include <complex.h> 1216 typedef __complex__ float float_type; 1217 typedef __complex__ double double_type; 1218 typedef __complex__ long double ld_type; 1219 volatile float_type tmpf; 1220 volatile double_type tmpd; 1221 volatile ld_type tmpld; 1222 volatile float f; 1223 volatile double d; 1224 volatile long double ld;], 1225 [f = cabsf(tmpf); 1226 f = cargf(tmpf); 1227 tmpf = ccosf(tmpf); 1228 tmpf = ccoshf(tmpf); 1229 tmpf = cexpf(tmpf); 1230 tmpf = clogf(tmpf); 1231 tmpf = csinf(tmpf); 1232 tmpf = csinhf(tmpf); 1233 tmpf = csqrtf(tmpf); 1234 tmpf = ctanf(tmpf); 1235 tmpf = ctanhf(tmpf); 1236 tmpf = cpowf(tmpf, tmpf); 1237 tmpf = cprojf(tmpf); 1238 d = cabs(tmpd); 1239 d = carg(tmpd); 1240 tmpd = ccos(tmpd); 1241 tmpd = ccosh(tmpd); 1242 tmpd = cexp(tmpd); 1243 tmpd = clog(tmpd); 1244 tmpd = csin(tmpd); 1245 tmpd = csinh(tmpd); 1246 tmpd = csqrt(tmpd); 1247 tmpd = ctan(tmpd); 1248 tmpd = ctanh(tmpd); 1249 tmpd = cpow(tmpd, tmpd); 1250 tmpd = cproj(tmpd); 1251 ld = cabsl(tmpld); 1252 ld = cargl(tmpld); 1253 tmpld = ccosl(tmpld); 1254 tmpld = ccoshl(tmpld); 1255 tmpld = cexpl(tmpld); 1256 tmpld = clogl(tmpld); 1257 tmpld = csinl(tmpld); 1258 tmpld = csinhl(tmpld); 1259 tmpld = csqrtl(tmpld); 1260 tmpld = ctanl(tmpld); 1261 tmpld = ctanhl(tmpld); 1262 tmpld = cpowl(tmpld, tmpld); 1263 tmpld = cprojl(tmpld); 1264 ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no]) 1265 ]) 1266 fi 1267 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx11) 1268 if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then 1269 AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1, 1270 [Define if C99 functions in <complex.h> should be used in 1271 <complex> for C++11. Using compiler builtins for these functions 1272 requires corresponding C99 library functions to be present.]) 1273 fi 1274 1275 # Check for the existence in <stdio.h> of vscanf, et. al. 1276 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++11]) 1277 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx11, [ 1278 GCC_TRY_COMPILE_OR_LINK( 1279 [#include <stdio.h> 1280 #include <stdarg.h> 1281 void foo(char* fmt, ...) 1282 { 1283 va_list args; va_start(args, fmt); 1284 vfscanf(stderr, "%i", args); 1285 vscanf("%i", args); 1286 vsnprintf(fmt, 0, "%i", args); 1287 vsscanf(fmt, "%i", args); 1288 snprintf(fmt, 0, "%i"); 1289 }], [], 1290 [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no]) 1291 ]) 1292 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx11) 1293 if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then 1294 AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1, 1295 [Define if C99 functions or macros in <stdio.h> should be imported 1296 in <cstdio> in namespace std for C++11.]) 1297 fi 1298 1299 # Check for the existence in <stdlib.h> of lldiv_t, et. al. 1300 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++11]) 1301 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx11, [ 1302 GCC_TRY_COMPILE_OR_LINK( 1303 [#include <stdlib.h> 1304 volatile float f; 1305 volatile long double ld; 1306 volatile unsigned long long ll; 1307 lldiv_t mydivt;], 1308 [char* tmp; 1309 f = strtof("gnu", &tmp); 1310 ld = strtold("gnu", &tmp); 1311 ll = strtoll("gnu", &tmp, 10); 1312 ll = strtoull("gnu", &tmp, 10); 1313 ll = llabs(10); 1314 mydivt = lldiv(10,1); 1315 ll = mydivt.quot; 1316 ll = mydivt.rem; 1317 ll = atoll("10"); 1318 _Exit(0); 1319 ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no]) 1320 ]) 1321 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx11) 1322 if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then 1323 AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1, 1324 [Define if C99 functions or macros in <stdlib.h> should be imported 1325 in <cstdlib> in namespace std for C++11.]) 1326 fi 1327 1328 # Check for the existence in <wchar.h> of wcstold, etc. 1329 if test x"$ac_has_wchar_h" = xyes && 1330 test x"$ac_has_wctype_h" = xyes; then 1331 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++11]) 1332 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx11, [ 1333 AC_TRY_COMPILE([#include <wchar.h> 1334 namespace test 1335 { 1336 using ::wcstold; 1337 using ::wcstoll; 1338 using ::wcstoull; 1339 } 1340 ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no]) 1341 ]) 1342 1343 # Checks for wide character functions that may not be present. 1344 # Injection of these is wrapped with guard macros. 1345 # NB: only put functions here, instead of immediately above, if 1346 # absolutely necessary. 1347 AC_TRY_COMPILE([#include <wchar.h> 1348 namespace test { using ::vfwscanf; }], [], 1349 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], []) 1350 1351 AC_TRY_COMPILE([#include <wchar.h> 1352 namespace test { using ::vswscanf; }], [], 1353 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], []) 1354 1355 AC_TRY_COMPILE([#include <wchar.h> 1356 namespace test { using ::vwscanf; }], [], 1357 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], []) 1358 1359 AC_TRY_COMPILE([#include <wchar.h> 1360 namespace test { using ::wcstof; }], [], 1361 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], []) 1362 1363 AC_TRY_COMPILE([#include <wctype.h>], 1364 [wint_t t; int i = iswblank(t);], 1365 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], []) 1366 1367 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx11) 1368 if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then 1369 AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1, 1370 [Define if C99 functions or macros in <wchar.h> should be imported 1371 in <cwchar> in namespace std for C++11.]) 1372 fi 1373 fi 1374 1375 gcc_no_link="$ac_save_gcc_no_link" 1376 LIBS="$ac_save_LIBS" 1377 CXXFLAGS="$ac_save_CXXFLAGS" 1378 AC_LANG_RESTORE 1379 fi 1380 1381 AC_MSG_CHECKING([for fully enabled ISO C99 support]) 1382 AC_MSG_RESULT($enable_c99) 1383]) 1384 1385 1386dnl 1387dnl Check for clock_gettime, nanosleep and sched_yield, used in the 1388dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this] 1389dnl in the C++11 standard. 1390dnl 1391dnl --enable-libstdcxx-time 1392dnl --enable-libstdcxx-time=yes 1393dnl checks for the availability of monotonic and realtime clocks, 1394dnl nanosleep and sched_yield in libc and libposix4 and, if needed, 1395dnl links in the latter. 1396dnl --enable-libstdcxx-time=rt 1397dnl also searches (and, if needed, links) librt. Note that this is 1398dnl not always desirable because, in glibc 2.16 and earlier, for 1399dnl example, in turn it triggers the linking of libpthread too, 1400dnl which activates locking, 1401dnl a large overhead for single-thread programs. 1402dnl --enable-libstdcxx-time=no 1403dnl --disable-libstdcxx-time 1404dnl disables the checks completely 1405dnl 1406dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX 1407dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test 1408dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in 1409dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD. 1410dnl 1411AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [ 1412 1413 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]], 1414 [use KIND for check type], 1415 [permit yes|no|rt]) 1416 1417 AC_LANG_SAVE 1418 AC_LANG_CPLUSPLUS 1419 ac_save_CXXFLAGS="$CXXFLAGS" 1420 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1421 ac_save_LIBS="$LIBS" 1422 1423 ac_has_clock_monotonic=no 1424 ac_has_clock_realtime=no 1425 ac_has_nanosleep=no 1426 ac_has_sched_yield=no 1427 1428 if test x"$enable_libstdcxx_time" = x"auto"; then 1429 1430 case "${target_os}" in 1431 cygwin*) 1432 ac_has_nanosleep=yes 1433 ;; 1434 darwin*) 1435 ac_has_nanosleep=yes 1436 ac_has_sched_yield=yes 1437 ;; 1438 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) 1439 AC_MSG_CHECKING([for at least GNU libc 2.17]) 1440 AC_TRY_COMPILE( 1441 [#include <features.h>], 1442 [ 1443 #if ! __GLIBC_PREREQ(2, 17) 1444 #error 1445 #endif 1446 ], 1447 [glibcxx_glibc217=yes], [glibcxx_glibc217=no]) 1448 AC_MSG_RESULT($glibcxx_glibc217) 1449 1450 if test x"$glibcxx_glibc217" = x"yes"; then 1451 ac_has_clock_monotonic=yes 1452 ac_has_clock_realtime=yes 1453 fi 1454 ac_has_nanosleep=yes 1455 ac_has_sched_yield=yes 1456 ;; 1457 freebsd*|netbsd*|dragonfly*) 1458 ac_has_clock_monotonic=yes 1459 ac_has_clock_realtime=yes 1460 ac_has_nanosleep=yes 1461 ac_has_sched_yield=yes 1462 ;; 1463 openbsd*) 1464 ac_has_clock_monotonic=yes 1465 ac_has_clock_realtime=yes 1466 ac_has_nanosleep=yes 1467 ;; 1468 solaris*) 1469 GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt" 1470 ac_has_clock_monotonic=yes 1471 ac_has_clock_realtime=yes 1472 ac_has_nanosleep=yes 1473 ac_has_sched_yield=yes 1474 ;; 1475 esac 1476 1477 elif test x"$enable_libstdcxx_time" != x"no"; then 1478 1479 if test x"$enable_libstdcxx_time" = x"rt"; then 1480 AC_SEARCH_LIBS(clock_gettime, [rt posix4]) 1481 AC_SEARCH_LIBS(nanosleep, [rt posix4]) 1482 else 1483 AC_SEARCH_LIBS(clock_gettime, [posix4]) 1484 AC_SEARCH_LIBS(nanosleep, [posix4]) 1485 fi 1486 1487 case "$ac_cv_search_clock_gettime" in 1488 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime 1489 ;; 1490 esac 1491 case "$ac_cv_search_nanosleep" in 1492 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep" 1493 ;; 1494 esac 1495 1496 AC_SEARCH_LIBS(sched_yield, [rt posix4]) 1497 1498 case "$ac_cv_search_sched_yield" in 1499 -lposix4*) 1500 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield" 1501 ac_has_sched_yield=yes 1502 ;; 1503 -lrt*) 1504 if test x"$enable_libstdcxx_time" = x"rt"; then 1505 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield" 1506 ac_has_sched_yield=yes 1507 fi 1508 ;; 1509 *) 1510 ac_has_sched_yield=yes 1511 ;; 1512 esac 1513 1514 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no) 1515 1516 if test x"$ac_has_unistd_h" = x"yes"; then 1517 AC_MSG_CHECKING([for monotonic clock]) 1518 AC_TRY_LINK( 1519 [#include <unistd.h> 1520 #include <time.h> 1521 ], 1522 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) 1523 timespec tp; 1524 #endif 1525 clock_gettime(CLOCK_MONOTONIC, &tp); 1526 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no]) 1527 1528 AC_MSG_RESULT($ac_has_clock_monotonic) 1529 1530 AC_MSG_CHECKING([for realtime clock]) 1531 AC_TRY_LINK( 1532 [#include <unistd.h> 1533 #include <time.h> 1534 ], 1535 [#if _POSIX_TIMERS > 0 1536 timespec tp; 1537 #endif 1538 clock_gettime(CLOCK_REALTIME, &tp); 1539 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no]) 1540 1541 AC_MSG_RESULT($ac_has_clock_realtime) 1542 1543 AC_MSG_CHECKING([for nanosleep]) 1544 AC_TRY_LINK( 1545 [#include <unistd.h> 1546 #include <time.h> 1547 ], 1548 [#if _POSIX_TIMERS > 0 1549 timespec tp; 1550 #endif 1551 nanosleep(&tp, 0); 1552 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no]) 1553 1554 AC_MSG_RESULT($ac_has_nanosleep) 1555 fi 1556 fi 1557 1558 if test x"$ac_has_clock_monotonic" != x"yes"; then 1559 case ${target_os} in 1560 linux*) 1561 AC_MSG_CHECKING([for clock_gettime syscall]) 1562 AC_TRY_COMPILE( 1563 [#include <unistd.h> 1564 #include <time.h> 1565 #include <sys/syscall.h> 1566 ], 1567 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK) 1568 timespec tp; 1569 #endif 1570 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp); 1571 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp); 1572 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no]) 1573 AC_MSG_RESULT($ac_has_clock_monotonic_syscall) 1574 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then 1575 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1, 1576 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ]) 1577 ac_has_clock_monotonic=yes 1578 ac_has_clock_realtime=yes 1579 fi;; 1580 esac 1581 fi 1582 1583 if test x"$ac_has_clock_monotonic" = x"yes"; then 1584 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1, 1585 [ Defined if clock_gettime has monotonic clock support. ]) 1586 fi 1587 1588 if test x"$ac_has_clock_realtime" = x"yes"; then 1589 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1, 1590 [ Defined if clock_gettime has realtime clock support. ]) 1591 fi 1592 1593 if test x"$ac_has_sched_yield" = x"yes"; then 1594 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1, 1595 [ Defined if sched_yield is available. ]) 1596 fi 1597 1598 if test x"$ac_has_nanosleep" = x"yes"; then 1599 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1, 1600 [ Defined if nanosleep is available. ]) 1601 else 1602 AC_MSG_CHECKING([for sleep]) 1603 AC_TRY_COMPILE([#include <unistd.h>], 1604 [sleep(1)], 1605 [ac_has_sleep=yes],[ac_has_sleep=no]) 1606 if test x"$ac_has_sleep" = x"yes"; then 1607 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.]) 1608 fi 1609 AC_MSG_RESULT($ac_has_sleep) 1610 AC_MSG_CHECKING([for usleep]) 1611 AC_TRY_COMPILE([#include <unistd.h>], 1612 [sleep(1); 1613 usleep(100);], 1614 [ac_has_usleep=yes],[ac_has_usleep=no]) 1615 if test x"$ac_has_usleep" = x"yes"; then 1616 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.]) 1617 fi 1618 AC_MSG_RESULT($ac_has_usleep) 1619 fi 1620 1621 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then 1622 AC_MSG_CHECKING([for Sleep]) 1623 AC_TRY_COMPILE([#include <windows.h>], 1624 [Sleep(1)], 1625 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no]) 1626 if test x"$ac_has_win32_sleep" = x"yes"; then 1627 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.]) 1628 fi 1629 AC_MSG_RESULT($ac_has_win32_sleep) 1630 fi 1631 1632 AC_SUBST(GLIBCXX_LIBS) 1633 1634 CXXFLAGS="$ac_save_CXXFLAGS" 1635 LIBS="$ac_save_LIBS" 1636 AC_LANG_RESTORE 1637]) 1638 1639dnl 1640dnl Check for gettimeofday, used in the implementation of 20.11.7 1641dnl [time.clock] in the C++11 standard. 1642dnl 1643AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [ 1644 1645 AC_MSG_CHECKING([for gettimeofday]) 1646 1647 AC_LANG_SAVE 1648 AC_LANG_CPLUSPLUS 1649 ac_save_CXXFLAGS="$CXXFLAGS" 1650 CXXFLAGS="$CXXFLAGS -fno-exceptions" 1651 1652 ac_has_gettimeofday=no; 1653 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no) 1654 if test x"$ac_has_sys_time_h" = x"yes"; then 1655 AC_MSG_CHECKING([for gettimeofday]) 1656 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>], 1657 [timeval tv; gettimeofday(&tv, 0);], 1658 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no]) 1659 1660 AC_MSG_RESULT($ac_has_gettimeofday) 1661 fi 1662 1663 if test x"$ac_has_gettimeofday" = x"yes"; then 1664 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1, 1665 [ Defined if gettimeofday is available. ]) 1666 fi 1667 1668 CXXFLAGS="$ac_save_CXXFLAGS" 1669 AC_LANG_RESTORE 1670]) 1671 1672dnl 1673dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1" 1674dnl facilities in Chapter 8, "C compatibility". 1675dnl 1676AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [ 1677 1678 AC_LANG_SAVE 1679 AC_LANG_CPLUSPLUS 1680 1681 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__ 1682 # undefined and fake C99 facilities may be spuriously enabled. 1683 ac_save_CXXFLAGS="$CXXFLAGS" 1684 CXXFLAGS="$CXXFLAGS -std=c++98" 1685 1686 # Check for the existence of <complex.h> complex math functions used 1687 # by tr1/complex. 1688 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no) 1689 ac_c99_complex_tr1=no; 1690 if test x"$ac_has_complex_h" = x"yes"; then 1691 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>]) 1692 AC_TRY_COMPILE([#include <complex.h>], 1693 [typedef __complex__ float float_type; float_type tmpf; 1694 cacosf(tmpf); 1695 casinf(tmpf); 1696 catanf(tmpf); 1697 cacoshf(tmpf); 1698 casinhf(tmpf); 1699 catanhf(tmpf); 1700 typedef __complex__ double double_type; double_type tmpd; 1701 cacos(tmpd); 1702 casin(tmpd); 1703 catan(tmpd); 1704 cacosh(tmpd); 1705 casinh(tmpd); 1706 catanh(tmpd); 1707 typedef __complex__ long double ld_type; ld_type tmpld; 1708 cacosl(tmpld); 1709 casinl(tmpld); 1710 catanl(tmpld); 1711 cacoshl(tmpld); 1712 casinhl(tmpld); 1713 catanhl(tmpld); 1714 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no]) 1715 fi 1716 AC_MSG_RESULT($ac_c99_complex_tr1) 1717 if test x"$ac_c99_complex_tr1" = x"yes"; then 1718 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1, 1719 [Define if C99 functions in <complex.h> should be used in 1720 <tr1/complex>. Using compiler builtins for these functions 1721 requires corresponding C99 library functions to be present.]) 1722 fi 1723 1724 # Check for the existence of <ctype.h> functions. 1725 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>]) 1726 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [ 1727 AC_TRY_COMPILE([#include <ctype.h>], 1728 [int ch; 1729 int ret; 1730 ret = isblank(ch); 1731 ],[glibcxx_cv_c99_ctype_tr1=yes], 1732 [glibcxx_cv_c99_ctype_tr1=no]) 1733 ]) 1734 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1) 1735 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then 1736 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1, 1737 [Define if C99 functions in <ctype.h> should be imported in 1738 <tr1/cctype> in namespace std::tr1.]) 1739 fi 1740 1741 # Check for the existence of <fenv.h> functions. 1742 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no) 1743 ac_c99_fenv_tr1=no; 1744 if test x"$ac_has_fenv_h" = x"yes"; then 1745 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>]) 1746 AC_TRY_COMPILE([#include <fenv.h>], 1747 [int except, mode; 1748 fexcept_t* pflag; 1749 fenv_t* penv; 1750 int ret; 1751 ret = feclearexcept(except); 1752 ret = fegetexceptflag(pflag, except); 1753 ret = feraiseexcept(except); 1754 ret = fesetexceptflag(pflag, except); 1755 ret = fetestexcept(except); 1756 ret = fegetround(); 1757 ret = fesetround(mode); 1758 ret = fegetenv(penv); 1759 ret = feholdexcept(penv); 1760 ret = fesetenv(penv); 1761 ret = feupdateenv(penv); 1762 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no]) 1763 fi 1764 AC_MSG_RESULT($ac_c99_fenv_tr1) 1765 if test x"$ac_c99_fenv_tr1" = x"yes"; then 1766 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1, 1767 [Define if C99 functions in <fenv.h> should be imported in 1768 <tr1/cfenv> in namespace std::tr1.]) 1769 fi 1770 1771 # Check for the existence of <stdint.h> types. 1772 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>]) 1773 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [ 1774 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS 1775 #define __STDC_CONSTANT_MACROS 1776 #include <stdint.h>], 1777 [typedef int8_t my_int8_t; 1778 my_int8_t i8 = INT8_MIN; 1779 i8 = INT8_MAX; 1780 typedef int16_t my_int16_t; 1781 my_int16_t i16 = INT16_MIN; 1782 i16 = INT16_MAX; 1783 typedef int32_t my_int32_t; 1784 my_int32_t i32 = INT32_MIN; 1785 i32 = INT32_MAX; 1786 typedef int64_t my_int64_t; 1787 my_int64_t i64 = INT64_MIN; 1788 i64 = INT64_MAX; 1789 typedef int_fast8_t my_int_fast8_t; 1790 my_int_fast8_t if8 = INT_FAST8_MIN; 1791 if8 = INT_FAST8_MAX; 1792 typedef int_fast16_t my_int_fast16_t; 1793 my_int_fast16_t if16 = INT_FAST16_MIN; 1794 if16 = INT_FAST16_MAX; 1795 typedef int_fast32_t my_int_fast32_t; 1796 my_int_fast32_t if32 = INT_FAST32_MIN; 1797 if32 = INT_FAST32_MAX; 1798 typedef int_fast64_t my_int_fast64_t; 1799 my_int_fast64_t if64 = INT_FAST64_MIN; 1800 if64 = INT_FAST64_MAX; 1801 typedef int_least8_t my_int_least8_t; 1802 my_int_least8_t il8 = INT_LEAST8_MIN; 1803 il8 = INT_LEAST8_MAX; 1804 typedef int_least16_t my_int_least16_t; 1805 my_int_least16_t il16 = INT_LEAST16_MIN; 1806 il16 = INT_LEAST16_MAX; 1807 typedef int_least32_t my_int_least32_t; 1808 my_int_least32_t il32 = INT_LEAST32_MIN; 1809 il32 = INT_LEAST32_MAX; 1810 typedef int_least64_t my_int_least64_t; 1811 my_int_least64_t il64 = INT_LEAST64_MIN; 1812 il64 = INT_LEAST64_MAX; 1813 typedef intmax_t my_intmax_t; 1814 my_intmax_t im = INTMAX_MAX; 1815 im = INTMAX_MIN; 1816 typedef intptr_t my_intptr_t; 1817 my_intptr_t ip = INTPTR_MAX; 1818 ip = INTPTR_MIN; 1819 typedef uint8_t my_uint8_t; 1820 my_uint8_t ui8 = UINT8_MAX; 1821 ui8 = UINT8_MAX; 1822 typedef uint16_t my_uint16_t; 1823 my_uint16_t ui16 = UINT16_MAX; 1824 ui16 = UINT16_MAX; 1825 typedef uint32_t my_uint32_t; 1826 my_uint32_t ui32 = UINT32_MAX; 1827 ui32 = UINT32_MAX; 1828 typedef uint64_t my_uint64_t; 1829 my_uint64_t ui64 = UINT64_MAX; 1830 ui64 = UINT64_MAX; 1831 typedef uint_fast8_t my_uint_fast8_t; 1832 my_uint_fast8_t uif8 = UINT_FAST8_MAX; 1833 uif8 = UINT_FAST8_MAX; 1834 typedef uint_fast16_t my_uint_fast16_t; 1835 my_uint_fast16_t uif16 = UINT_FAST16_MAX; 1836 uif16 = UINT_FAST16_MAX; 1837 typedef uint_fast32_t my_uint_fast32_t; 1838 my_uint_fast32_t uif32 = UINT_FAST32_MAX; 1839 uif32 = UINT_FAST32_MAX; 1840 typedef uint_fast64_t my_uint_fast64_t; 1841 my_uint_fast64_t uif64 = UINT_FAST64_MAX; 1842 uif64 = UINT_FAST64_MAX; 1843 typedef uint_least8_t my_uint_least8_t; 1844 my_uint_least8_t uil8 = UINT_LEAST8_MAX; 1845 uil8 = UINT_LEAST8_MAX; 1846 typedef uint_least16_t my_uint_least16_t; 1847 my_uint_least16_t uil16 = UINT_LEAST16_MAX; 1848 uil16 = UINT_LEAST16_MAX; 1849 typedef uint_least32_t my_uint_least32_t; 1850 my_uint_least32_t uil32 = UINT_LEAST32_MAX; 1851 uil32 = UINT_LEAST32_MAX; 1852 typedef uint_least64_t my_uint_least64_t; 1853 my_uint_least64_t uil64 = UINT_LEAST64_MAX; 1854 uil64 = UINT_LEAST64_MAX; 1855 typedef uintmax_t my_uintmax_t; 1856 my_uintmax_t uim = UINTMAX_MAX; 1857 uim = UINTMAX_MAX; 1858 typedef uintptr_t my_uintptr_t; 1859 my_uintptr_t uip = UINTPTR_MAX; 1860 uip = UINTPTR_MAX; 1861 ],[glibcxx_cv_c99_stdint_tr1=yes], 1862 [glibcxx_cv_c99_stdint_tr1=no]) 1863 ]) 1864 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1) 1865 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 1866 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1, 1867 [Define if C99 types in <stdint.h> should be imported in 1868 <tr1/cstdint> in namespace std::tr1.]) 1869 fi 1870 1871 # Check for the existence of <math.h> functions. 1872 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>]) 1873 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [ 1874 AC_TRY_COMPILE([#include <math.h>], 1875 [typedef double_t my_double_t; 1876 typedef float_t my_float_t; 1877 acosh(0.0); 1878 acoshf(0.0f); 1879 acoshl(0.0l); 1880 asinh(0.0); 1881 asinhf(0.0f); 1882 asinhl(0.0l); 1883 atanh(0.0); 1884 atanhf(0.0f); 1885 atanhl(0.0l); 1886 cbrt(0.0); 1887 cbrtf(0.0f); 1888 cbrtl(0.0l); 1889 copysign(0.0, 0.0); 1890 copysignf(0.0f, 0.0f); 1891 copysignl(0.0l, 0.0l); 1892 erf(0.0); 1893 erff(0.0f); 1894 erfl(0.0l); 1895 erfc(0.0); 1896 erfcf(0.0f); 1897 erfcl(0.0l); 1898 exp2(0.0); 1899 exp2f(0.0f); 1900 exp2l(0.0l); 1901 expm1(0.0); 1902 expm1f(0.0f); 1903 expm1l(0.0l); 1904 fdim(0.0, 0.0); 1905 fdimf(0.0f, 0.0f); 1906 fdiml(0.0l, 0.0l); 1907 fma(0.0, 0.0, 0.0); 1908 fmaf(0.0f, 0.0f, 0.0f); 1909 fmal(0.0l, 0.0l, 0.0l); 1910 fmax(0.0, 0.0); 1911 fmaxf(0.0f, 0.0f); 1912 fmaxl(0.0l, 0.0l); 1913 fmin(0.0, 0.0); 1914 fminf(0.0f, 0.0f); 1915 fminl(0.0l, 0.0l); 1916 hypot(0.0, 0.0); 1917 hypotf(0.0f, 0.0f); 1918 hypotl(0.0l, 0.0l); 1919 ilogb(0.0); 1920 ilogbf(0.0f); 1921 ilogbl(0.0l); 1922 lgamma(0.0); 1923 lgammaf(0.0f); 1924 lgammal(0.0l); 1925 llrint(0.0); 1926 llrintf(0.0f); 1927 llrintl(0.0l); 1928 llround(0.0); 1929 llroundf(0.0f); 1930 llroundl(0.0l); 1931 log1p(0.0); 1932 log1pf(0.0f); 1933 log1pl(0.0l); 1934 log2(0.0); 1935 log2f(0.0f); 1936 log2l(0.0l); 1937 logb(0.0); 1938 logbf(0.0f); 1939 logbl(0.0l); 1940 lrint(0.0); 1941 lrintf(0.0f); 1942 lrintl(0.0l); 1943 lround(0.0); 1944 lroundf(0.0f); 1945 lroundl(0.0l); 1946 nan(0); 1947 nanf(0); 1948 nanl(0); 1949 nearbyint(0.0); 1950 nearbyintf(0.0f); 1951 nearbyintl(0.0l); 1952 nextafter(0.0, 0.0); 1953 nextafterf(0.0f, 0.0f); 1954 nextafterl(0.0l, 0.0l); 1955 nexttoward(0.0, 0.0); 1956 nexttowardf(0.0f, 0.0f); 1957 nexttowardl(0.0l, 0.0l); 1958 remainder(0.0, 0.0); 1959 remainderf(0.0f, 0.0f); 1960 remainderl(0.0l, 0.0l); 1961 remquo(0.0, 0.0, 0); 1962 remquof(0.0f, 0.0f, 0); 1963 remquol(0.0l, 0.0l, 0); 1964 rint(0.0); 1965 rintf(0.0f); 1966 rintl(0.0l); 1967 round(0.0); 1968 roundf(0.0f); 1969 roundl(0.0l); 1970 scalbln(0.0, 0l); 1971 scalblnf(0.0f, 0l); 1972 scalblnl(0.0l, 0l); 1973 scalbn(0.0, 0); 1974 scalbnf(0.0f, 0); 1975 scalbnl(0.0l, 0); 1976 tgamma(0.0); 1977 tgammaf(0.0f); 1978 tgammal(0.0l); 1979 trunc(0.0); 1980 truncf(0.0f); 1981 truncl(0.0l); 1982 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no]) 1983 ]) 1984 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1) 1985 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then 1986 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1, 1987 [Define if C99 functions or macros in <math.h> should be imported 1988 in <tr1/cmath> in namespace std::tr1.]) 1989 fi 1990 1991 # Check for the existence of <inttypes.h> functions (NB: doesn't make 1992 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1). 1993 ac_c99_inttypes_tr1=no; 1994 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 1995 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>]) 1996 AC_TRY_COMPILE([#include <inttypes.h>], 1997 [intmax_t i, numer, denom, base; 1998 const char* s; 1999 char** endptr; 2000 intmax_t ret = imaxabs(i); 2001 imaxdiv_t dret = imaxdiv(numer, denom); 2002 ret = strtoimax(s, endptr, base); 2003 uintmax_t uret = strtoumax(s, endptr, base); 2004 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no]) 2005 fi 2006 AC_MSG_RESULT($ac_c99_inttypes_tr1) 2007 if test x"$ac_c99_inttypes_tr1" = x"yes"; then 2008 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1, 2009 [Define if C99 functions in <inttypes.h> should be imported in 2010 <tr1/cinttypes> in namespace std::tr1.]) 2011 fi 2012 2013 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't 2014 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1). 2015 ac_c99_inttypes_wchar_t_tr1=no; 2016 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then 2017 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>]) 2018 AC_TRY_COMPILE([#include <inttypes.h>], 2019 [intmax_t base; 2020 const wchar_t* s; 2021 wchar_t** endptr; 2022 intmax_t ret = wcstoimax(s, endptr, base); 2023 uintmax_t uret = wcstoumax(s, endptr, base); 2024 ],[ac_c99_inttypes_wchar_t_tr1=yes], 2025 [ac_c99_inttypes_wchar_t_tr1=no]) 2026 fi 2027 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1) 2028 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then 2029 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1, 2030 [Define if wchar_t C99 functions in <inttypes.h> should be 2031 imported in <tr1/cinttypes> in namespace std::tr1.]) 2032 fi 2033 2034 # Check for the existence of the <stdbool.h> header. 2035 AC_CHECK_HEADERS(stdbool.h) 2036 2037 # Check for the existence of the <stdalign.h> header. 2038 AC_CHECK_HEADERS(stdalign.h) 2039 2040 CXXFLAGS="$ac_save_CXXFLAGS" 2041 AC_LANG_RESTORE 2042]) 2043 2044dnl 2045dnl Check for uchar.h and usability. 2046dnl 2047AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [ 2048 2049 # Test uchar.h. 2050 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no) 2051 2052 AC_LANG_SAVE 2053 AC_LANG_CPLUSPLUS 2054 ac_save_CXXFLAGS="$CXXFLAGS" 2055 CXXFLAGS="$CXXFLAGS -std=c++11" 2056 2057 if test x"$ac_has_uchar_h" = x"yes"; then 2058 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>]) 2059 AC_TRY_COMPILE([#include <uchar.h> 2060 #ifdef __STDC_UTF_16__ 2061 long i = __STDC_UTF_16__; 2062 #endif 2063 #ifdef __STDC_UTF_32__ 2064 long j = __STDC_UTF_32__; 2065 #endif 2066 namespace test 2067 { 2068 using ::c16rtomb; 2069 using ::c32rtomb; 2070 using ::mbrtoc16; 2071 using ::mbrtoc32; 2072 } 2073 ], 2074 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no]) 2075 else 2076 ac_c11_uchar_cxx11=no 2077 fi 2078 AC_MSG_RESULT($ac_c11_uchar_cxx11) 2079 if test x"$ac_c11_uchar_cxx11" = x"yes"; then 2080 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1, 2081 [Define if C11 functions in <uchar.h> should be imported into 2082 namespace std in <cuchar>.]) 2083 fi 2084 2085 CXXFLAGS="$ac_save_CXXFLAGS" 2086 AC_LANG_RESTORE 2087]) 2088 2089 2090dnl 2091dnl Check whether "/dev/random" and "/dev/urandom" are available for the 2092dnl random_device of "TR1" (Chapter 5.1, "Random number generation"). 2093dnl 2094AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [ 2095 2096 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device]) 2097 AC_CACHE_VAL(glibcxx_cv_random_tr1, [ 2098 if test -r /dev/random && test -r /dev/urandom; then 2099 ## For MSys environment the test above is detect as false-positive 2100 ## on mingw-targets. So disable it explicit for them. 2101 case ${target_os} in 2102 *mingw*) glibcxx_cv_random_tr1=no ;; 2103 *) glibcxx_cv_random_tr1=yes ;; 2104 esac 2105 else 2106 glibcxx_cv_random_tr1=no; 2107 fi 2108 ]) 2109 AC_MSG_RESULT($glibcxx_cv_random_tr1) 2110 2111 if test x"$glibcxx_cv_random_tr1" = x"yes"; then 2112 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1, 2113 [Define if /dev/random and /dev/urandom are available for 2114 the random_device of TR1 (Chapter 5.1).]) 2115 fi 2116 2117]) 2118 2119dnl 2120dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants. 2121dnl 2122AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [ 2123 2124 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [ 2125 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]], 2126 [#include <stdio.h>], 2127 [AC_MSG_ERROR([computing EOF failed])]) 2128 ]) 2129 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof, 2130 [Define to the value of the EOF integer constant.]) 2131 2132 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [ 2133 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]], 2134 [#include <stdio.h>], 2135 [AC_MSG_ERROR([computing SEEK_CUR failed])]) 2136 ]) 2137 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur, 2138 [Define to the value of the SEEK_CUR integer constant.]) 2139 2140 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [ 2141 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]], 2142 [#include <stdio.h>], 2143 [AC_MSG_ERROR([computing SEEK_END failed])]) 2144 ]) 2145 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end, 2146 [Define to the value of the SEEK_END integer constant.]) 2147]) 2148 2149dnl 2150dnl Check whether required C++ overloads are present in <stdio.h>. 2151dnl 2152AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [ 2153 2154 AC_LANG_SAVE 2155 AC_LANG_CPLUSPLUS 2156 # Use C++11 because a conforming <stdio.h> won't define gets for C++14, 2157 # and we don't need a declaration for C++14 anyway. 2158 ac_save_CXXFLAGS="$CXXFLAGS" 2159 CXXFLAGS="$CXXFLAGS -std=gnu++11" 2160 2161 AC_MSG_CHECKING([for gets declaration]) 2162 AC_CACHE_VAL(glibcxx_cv_gets, [ 2163 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2164 [#include <stdio.h> 2165 namespace test 2166 { 2167 using ::gets; 2168 } 2169 ])], 2170 [glibcxx_cv_gets=yes], 2171 [glibcxx_cv_gets=no] 2172 )]) 2173 2174 if test $glibcxx_cv_gets = yes; then 2175 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.]) 2176 fi 2177 AC_MSG_RESULT($glibcxx_cv_gets) 2178 2179 CXXFLAGS="$ac_save_CXXFLAGS" 2180 AC_LANG_RESTORE 2181]) 2182 2183dnl 2184dnl Check whether required C++11 overloads for floating point and integral 2185dnl types are present in <math.h>. 2186dnl 2187AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [ 2188 2189 AC_LANG_SAVE 2190 AC_LANG_CPLUSPLUS 2191 ac_save_CXXFLAGS="$CXXFLAGS" 2192 CXXFLAGS="$CXXFLAGS -std=c++11" 2193 2194 case "$host" in 2195 *-*-solaris2.*) 2196 # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch 2197 # 11996[67]-02 introduced the C++11 <math.h> floating point overloads. 2198 AC_MSG_CHECKING([for C++11 <math.h> floating point overloads]) 2199 AC_CACHE_VAL(glibcxx_cv_math11_fp_overload, [ 2200 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2201 [#include <math.h> 2202 #undef isfinite 2203 namespace std { 2204 inline bool isfinite(float __x) 2205 { return __builtin_isfinite(__x); } 2206 } 2207 ])], 2208 [glibcxx_cv_math11_fp_overload=no], 2209 [glibcxx_cv_math11_fp_overload=yes] 2210 )]) 2211 2212 # autoheader cannot handle indented templates. 2213 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP], 2214 [/* Define if all C++11 floating point overloads are available in <math.h>. */ 2215#if __cplusplus >= 201103L 2216#undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP 2217#endif]) 2218 2219 if test $glibcxx_cv_math11_fp_overload = yes; then 2220 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP) 2221 fi 2222 AC_MSG_RESULT([$glibcxx_cv_math11_fp_overload]) 2223 2224 # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch 2225 # 11996[67]-02 introduced the C++11 <math.h> integral type overloads. 2226 AC_MSG_CHECKING([for C++11 <math.h> integral type overloads]) 2227 AC_CACHE_VAL(glibcxx_cv_math11_int_overload, [ 2228 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2229 [#include <math.h> 2230 namespace std { 2231 template<typename _Tp> 2232 struct __is_integer; 2233 template<> 2234 struct __is_integer<int> 2235 { 2236 enum { __value = 1 }; 2237 }; 2238 } 2239 namespace __gnu_cxx { 2240 template<bool, typename> 2241 struct __enable_if; 2242 template<typename _Tp> 2243 struct __enable_if<true, _Tp> 2244 { typedef _Tp __type; }; 2245 } 2246 namespace std { 2247 template<typename _Tp> 2248 constexpr typename __gnu_cxx::__enable_if 2249 <__is_integer<_Tp>::__value, double>::__type 2250 log2(_Tp __x) 2251 { return __builtin_log2(__x); } 2252 } 2253 int 2254 main (void) 2255 { 2256 int i = 1000; 2257 return std::log2(i); 2258 } 2259 ])], 2260 [glibcxx_cv_math11_int_overload=no], 2261 [glibcxx_cv_math11_int_overload=yes] 2262 )]) 2263 2264 # autoheader cannot handle indented templates. 2265 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT], 2266 [/* Define if all C++11 integral type overloads are available in <math.h>. */ 2267#if __cplusplus >= 201103L 2268#undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT 2269#endif]) 2270 2271 if test $glibcxx_cv_math11_int_overload = yes; then 2272 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT) 2273 fi 2274 AC_MSG_RESULT([$glibcxx_cv_math11_int_overload]) 2275 ;; 2276 *) 2277 # If <math.h> defines the obsolete isinf(double) and isnan(double) 2278 # functions (instead of or as well as the C99 generic macros) then we 2279 # can't define std::isinf(double) and std::isnan(double) in <cmath> 2280 # and must use the ones from <math.h> instead. 2281 AC_MSG_CHECKING([for obsolete isinf function in <math.h>]) 2282 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf, [ 2283 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2284 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS 2285 #include <math.h> 2286 #undef isinf 2287 namespace std { 2288 using ::isinf; 2289 bool isinf(float); 2290 bool isinf(long double); 2291 } 2292 using std::isinf; 2293 bool b = isinf(0.0); 2294 ])], 2295 [glibcxx_cv_obsolete_isinf=yes], 2296 [glibcxx_cv_obsolete_isinf=no] 2297 )]) 2298 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf]) 2299 if test $glibcxx_cv_obsolete_isinf = yes; then 2300 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1, 2301 [Define if <math.h> defines obsolete isinf function.]) 2302 fi 2303 2304 AC_MSG_CHECKING([for obsolete isnan function in <math.h>]) 2305 AC_CACHE_VAL(glibcxx_cv_obsolete_isnan, [ 2306 AC_COMPILE_IFELSE([AC_LANG_SOURCE( 2307 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS 2308 #include <math.h> 2309 #undef isnan 2310 namespace std { 2311 using ::isnan; 2312 bool isnan(float); 2313 bool isnan(long double); 2314 } 2315 using std::isnan; 2316 bool b = isnan(0.0); 2317 ])], 2318 [glibcxx_cv_obsolete_isnan=yes], 2319 [glibcxx_cv_obsolete_isnan=no] 2320 )]) 2321 AC_MSG_RESULT([$glibcxx_cv_obsolete_isnan]) 2322 if test $glibcxx_cv_obsolete_isnan = yes; then 2323 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1, 2324 [Define if <math.h> defines obsolete isnan function.]) 2325 fi 2326 ;; 2327 esac 2328 2329 CXXFLAGS="$ac_save_CXXFLAGS" 2330 AC_LANG_RESTORE 2331]) 2332 2333dnl 2334dnl Check whether macros, etc are present for <system_error> 2335dnl 2336AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [ 2337 2338m4_pushdef([n_syserr], [1])dnl 2339m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA, 2340 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED, 2341 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY, 2342 ECHILD, ENOSPC, EPERM, 2343 ETIMEDOUT, EWOULDBLOCK], 2344[m4_pushdef([SYSERR], m4_toupper(syserr))dnl 2345AC_MSG_CHECKING([for syserr]) 2346AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [ 2347AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]], 2348 [int i = syserr;])], 2349 [glibcxx_cv_system_error[]n_syserr=yes], 2350 [glibcxx_cv_system_error[]n_syserr=no]) 2351]) 2352AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr]) 2353if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then 2354 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.]) 2355fi 2356m4_define([n_syserr], m4_incr(n_syserr))dnl 2357m4_popdef([SYSERR])dnl 2358]) 2359m4_popdef([n_syserr])dnl 2360]) 2361 2362dnl 2363dnl Check for what type of C headers to use. 2364dnl 2365dnl --enable-cheaders= [does stuff]. 2366dnl --disable-cheaders [does not do anything, really]. 2367dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)] 2368dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'. 2369dnl 2370AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [ 2371 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]], 2372 [construct "C" headers for g++], [permit c|c_std|c_global]) 2373 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders) 2374 2375 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders 2376 2377 # Allow overrides to configure.host here. 2378 if test $enable_cheaders = c_global; then 2379 c_compatibility=yes 2380 fi 2381 2382 AC_SUBST(C_INCLUDE_DIR) 2383 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c) 2384 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std) 2385 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global) 2386 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes) 2387]) 2388 2389 2390dnl 2391dnl Check for which locale library to use. The choice is mapped to 2392dnl a subdirectory of config/locale. 2393dnl 2394dnl Default is generic. 2395dnl 2396AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [ 2397 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]], 2398 [use MODEL for target locale package], 2399 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto]) 2400 2401 # Deal with gettext issues. Default to not using it (=no) until we detect 2402 # support for it later. Let the user turn it off via --e/d, but let that 2403 # default to on for easier handling. 2404 USE_NLS=no 2405 AC_ARG_ENABLE(nls, 2406 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]), 2407 [], 2408 [enable_nls=yes]) 2409 2410 # Either a known package, or "auto" 2411 if test $enable_clocale = no || test $enable_clocale = yes; then 2412 enable_clocale=auto 2413 fi 2414 enable_clocale_flag=$enable_clocale 2415 2416 # Probe for locale model to use if none specified. 2417 # Default to "generic". 2418 if test $enable_clocale_flag = auto; then 2419 case ${target_os} in 2420 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) 2421 enable_clocale_flag=gnu 2422 ;; 2423 darwin*) 2424 enable_clocale_flag=darwin 2425 ;; 2426 dragonfly* | freebsd*) 2427 enable_clocale_flag=dragonfly 2428 ;; 2429 openbsd*) 2430 enable_clocale_flag=newlib 2431 ;; 2432 *) 2433 if test x"$with_newlib" = x"yes"; then 2434 enable_clocale_flag=newlib 2435 else 2436 enable_clocale_flag=generic 2437 fi 2438 ;; 2439 esac 2440 fi 2441 2442 # Sanity check model, and test for special functionality. 2443 if test $enable_clocale_flag = gnu; then 2444 AC_EGREP_CPP([_GLIBCXX_ok], [ 2445 #include <features.h> 2446 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__) 2447 _GLIBCXX_ok 2448 #endif 2449 ], enable_clocale_flag=gnu, enable_clocale_flag=generic) 2450 2451 # Set it to scream when it hurts. 2452 ac_save_CFLAGS="$CFLAGS" 2453 CFLAGS="-Wimplicit-function-declaration -Werror" 2454 2455 # Use strxfrm_l if available. 2456 AC_TRY_COMPILE([#define _GNU_SOURCE 1 2457 #include <string.h> 2458 #include <locale.h>], 2459 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);], 2460 AC_DEFINE(HAVE_STRXFRM_L, 1, 2461 [Define if strxfrm_l is available in <string.h>.]),) 2462 2463 # Use strerror_l if available. 2464 AC_TRY_COMPILE([#define _GNU_SOURCE 1 2465 #include <string.h> 2466 #include <locale.h>], 2467 [__locale_t loc; strerror_l(5, loc);], 2468 AC_DEFINE(HAVE_STRERROR_L, 1, 2469 [Define if strerror_l is available in <string.h>.]),) 2470 2471 CFLAGS="$ac_save_CFLAGS" 2472 fi 2473 2474 # Perhaps use strerror_r if available, and strerror_l isn't. 2475 ac_save_CFLAGS="$CFLAGS" 2476 CFLAGS="-Wimplicit-function-declaration -Werror" 2477 AC_TRY_COMPILE([#define _GNU_SOURCE 1 2478 #include <string.h> 2479 #include <locale.h>], 2480 [char s[128]; strerror_r(5, s, 128);], 2481 AC_DEFINE(HAVE_STRERROR_R, 1, 2482 [Define if strerror_r is available in <string.h>.]),) 2483 CFLAGS="$ac_save_CFLAGS" 2484 2485 # Set configure bits for specified locale package 2486 AC_MSG_CHECKING([for C locale to use]) 2487 case ${enable_clocale_flag} in 2488 generic) 2489 AC_MSG_RESULT(generic) 2490 2491 CLOCALE_H=config/locale/generic/c_locale.h 2492 CLOCALE_CC=config/locale/generic/c_locale.cc 2493 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2494 CCOLLATE_CC=config/locale/generic/collate_members.cc 2495 CCTYPE_CC=config/locale/generic/ctype_members.cc 2496 CMESSAGES_H=config/locale/generic/messages_members.h 2497 CMESSAGES_CC=config/locale/generic/messages_members.cc 2498 CMONEY_CC=config/locale/generic/monetary_members.cc 2499 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2500 CTIME_H=config/locale/generic/time_members.h 2501 CTIME_CC=config/locale/generic/time_members.cc 2502 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2503 ;; 2504 darwin) 2505 AC_MSG_RESULT(darwin) 2506 2507 CLOCALE_H=config/locale/generic/c_locale.h 2508 CLOCALE_CC=config/locale/generic/c_locale.cc 2509 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2510 CCOLLATE_CC=config/locale/generic/collate_members.cc 2511 CCTYPE_CC=config/locale/darwin/ctype_members.cc 2512 CMESSAGES_H=config/locale/generic/messages_members.h 2513 CMESSAGES_CC=config/locale/generic/messages_members.cc 2514 CMONEY_CC=config/locale/generic/monetary_members.cc 2515 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2516 CTIME_H=config/locale/generic/time_members.h 2517 CTIME_CC=config/locale/generic/time_members.cc 2518 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2519 ;; 2520 2521 dragonfly) 2522 AC_MSG_RESULT(dragonfly or freebsd) 2523 2524 CLOCALE_H=config/locale/dragonfly/c_locale.h 2525 CLOCALE_CC=config/locale/dragonfly/c_locale.cc 2526 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc 2527 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc 2528 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc 2529 CMESSAGES_H=config/locale/generic/messages_members.h 2530 CMESSAGES_CC=config/locale/generic/messages_members.cc 2531 CMONEY_CC=config/locale/dragonfly/monetary_members.cc 2532 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc 2533 CTIME_H=config/locale/dragonfly/time_members.h 2534 CTIME_CC=config/locale/dragonfly/time_members.cc 2535 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2536 ;; 2537 2538 gnu) 2539 AC_MSG_RESULT(gnu) 2540 2541 # Declare intention to use gettext, and add support for specific 2542 # languages. 2543 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT 2544 ALL_LINGUAS="de fr" 2545 2546 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc. 2547 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no) 2548 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then 2549 USE_NLS=yes 2550 fi 2551 # Export the build objects. 2552 for ling in $ALL_LINGUAS; do \ 2553 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \ 2554 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \ 2555 done 2556 AC_SUBST(glibcxx_MOFILES) 2557 AC_SUBST(glibcxx_POFILES) 2558 2559 CLOCALE_H=config/locale/gnu/c_locale.h 2560 CLOCALE_CC=config/locale/gnu/c_locale.cc 2561 CCODECVT_CC=config/locale/gnu/codecvt_members.cc 2562 CCOLLATE_CC=config/locale/gnu/collate_members.cc 2563 CCTYPE_CC=config/locale/gnu/ctype_members.cc 2564 CMESSAGES_H=config/locale/gnu/messages_members.h 2565 CMESSAGES_CC=config/locale/gnu/messages_members.cc 2566 CMONEY_CC=config/locale/gnu/monetary_members.cc 2567 CNUMERIC_CC=config/locale/gnu/numeric_members.cc 2568 CTIME_H=config/locale/gnu/time_members.h 2569 CTIME_CC=config/locale/gnu/time_members.cc 2570 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h 2571 ;; 2572 ieee_1003.1-2001) 2573 AC_MSG_RESULT(IEEE 1003.1) 2574 2575 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h 2576 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc 2577 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2578 CCOLLATE_CC=config/locale/generic/collate_members.cc 2579 CCTYPE_CC=config/locale/generic/ctype_members.cc 2580 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h 2581 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc 2582 CMONEY_CC=config/locale/generic/monetary_members.cc 2583 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2584 CTIME_H=config/locale/generic/time_members.h 2585 CTIME_CC=config/locale/generic/time_members.cc 2586 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2587 ;; 2588 newlib) 2589 AC_MSG_RESULT(newlib) 2590 2591 CLOCALE_H=config/locale/generic/c_locale.h 2592 CLOCALE_CC=config/locale/generic/c_locale.cc 2593 CCODECVT_CC=config/locale/generic/codecvt_members.cc 2594 CCOLLATE_CC=config/locale/generic/collate_members.cc 2595 CCTYPE_CC=config/locale/newlib/ctype_members.cc 2596 CMESSAGES_H=config/locale/generic/messages_members.h 2597 CMESSAGES_CC=config/locale/generic/messages_members.cc 2598 CMONEY_CC=config/locale/generic/monetary_members.cc 2599 CNUMERIC_CC=config/locale/generic/numeric_members.cc 2600 CTIME_H=config/locale/generic/time_members.h 2601 CTIME_CC=config/locale/generic/time_members.cc 2602 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h 2603 ;; 2604 esac 2605 2606 # This is where the testsuite looks for locale catalogs, using the 2607 # -DLOCALEDIR define during testsuite compilation. 2608 glibcxx_localedir=${glibcxx_builddir}/po/share/locale 2609 AC_SUBST(glibcxx_localedir) 2610 2611 # A standalone libintl (e.g., GNU libintl) may be in use. 2612 if test $USE_NLS = yes; then 2613 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no) 2614 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no) 2615 fi 2616 if test $USE_NLS = yes; then 2617 AC_DEFINE(_GLIBCXX_USE_NLS, 1, 2618 [Define if NLS translations are to be used.]) 2619 fi 2620 2621 AC_SUBST(USE_NLS) 2622 AC_SUBST(CLOCALE_H) 2623 AC_SUBST(CMESSAGES_H) 2624 AC_SUBST(CCODECVT_CC) 2625 AC_SUBST(CCOLLATE_CC) 2626 AC_SUBST(CCTYPE_CC) 2627 AC_SUBST(CMESSAGES_CC) 2628 AC_SUBST(CMONEY_CC) 2629 AC_SUBST(CNUMERIC_CC) 2630 AC_SUBST(CTIME_H) 2631 AC_SUBST(CTIME_CC) 2632 AC_SUBST(CLOCALE_CC) 2633 AC_SUBST(CLOCALE_INTERNAL_H) 2634]) 2635 2636 2637dnl 2638dnl Check for which std::allocator base class to use. The choice is 2639dnl mapped from a subdirectory of include/ext. 2640dnl 2641dnl Default is new. 2642dnl 2643AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [ 2644 AC_MSG_CHECKING([for std::allocator base class]) 2645 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]], 2646 [use KIND for target std::allocator base], 2647 [permit new|malloc|mt|bitmap|pool|yes|no|auto]) 2648 2649 # If they didn't use this option switch, or if they specified --enable 2650 # with no specific model, we'll have to look for one. If they 2651 # specified --disable (???), do likewise. 2652 if test $enable_libstdcxx_allocator = no || 2653 test $enable_libstdcxx_allocator = yes; 2654 then 2655 enable_libstdcxx_allocator=auto 2656 fi 2657 2658 # Either a known package, or "auto". Auto implies the default choice 2659 # for a particular platform. 2660 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator 2661 2662 # Probe for host-specific support if no specific model is specified. 2663 # Default to "new". 2664 if test $enable_libstdcxx_allocator_flag = auto; then 2665 case ${target_os} in 2666 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu) 2667 enable_libstdcxx_allocator_flag=new 2668 ;; 2669 *) 2670 enable_libstdcxx_allocator_flag=new 2671 ;; 2672 esac 2673 fi 2674 AC_MSG_RESULT($enable_libstdcxx_allocator_flag) 2675 2676 2677 # Set configure bits for specified locale package 2678 case ${enable_libstdcxx_allocator_flag} in 2679 bitmap) 2680 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h 2681 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator 2682 ;; 2683 malloc) 2684 ALLOCATOR_H=config/allocator/malloc_allocator_base.h 2685 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator 2686 ;; 2687 mt) 2688 ALLOCATOR_H=config/allocator/mt_allocator_base.h 2689 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc 2690 ;; 2691 new) 2692 ALLOCATOR_H=config/allocator/new_allocator_base.h 2693 ALLOCATOR_NAME=__gnu_cxx::new_allocator 2694 ;; 2695 pool) 2696 ALLOCATOR_H=config/allocator/pool_allocator_base.h 2697 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc 2698 ;; 2699 esac 2700 2701 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW, 2702 test $enable_libstdcxx_allocator_flag = new) 2703 AC_SUBST(ALLOCATOR_H) 2704 AC_SUBST(ALLOCATOR_NAME) 2705]) 2706 2707 2708dnl 2709dnl Check for whether the Boost-derived checks should be turned on. 2710dnl 2711dnl --enable-concept-checks turns them on. 2712dnl --disable-concept-checks leaves them off. 2713dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)] 2714dnl Where DEFAULT is either `yes' or `no'. 2715dnl 2716AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [ 2717 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks]) 2718 if test $enable_concept_checks = yes; then 2719 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1, 2720 [Define to use concept checking code from the boost libraries.]) 2721 fi 2722]) 2723 2724dnl 2725dnl Use extern templates. 2726dnl 2727dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1 2728dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0 2729 2730dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)] 2731dnl Where DEFAULT is `yes' or `no'. 2732dnl 2733AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [ 2734 2735 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template]) 2736 2737 AC_MSG_CHECKING([for extern template support]) 2738 AC_MSG_RESULT([$enable_extern_template]) 2739 2740 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes) 2741]) 2742 2743dnl 2744dnl Use vtable verification. 2745dnl 2746dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1 2747dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0 2748 2749dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)] 2750dnl Where DEFAULT is `yes' or `no'. 2751dnl 2752AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [ 2753 2754 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify]) 2755 2756 AC_MSG_CHECKING([for vtable verify support]) 2757 AC_MSG_RESULT([$enable_vtable_verify]) 2758 2759 vtv_cygmin=no 2760 if test $enable_vtable_verify = yes; then 2761 case ${target_os} in 2762 cygwin*|mingw32*) 2763 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end" 2764 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs" 2765 vtv_cygmin=yes 2766 ;; 2767 darwin*) 2768 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end" 2769 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs" 2770 ;; 2771 solaris2*) 2772 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end" 2773 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs" 2774 ;; 2775 *) 2776 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end" 2777 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs" 2778 ;; 2779 esac 2780 VTV_PCH_CXXFLAGS="-fvtable-verify=std" 2781 else 2782 VTV_CXXFLAGS= 2783 VTV_PCH_CXXFLAGS= 2784 VTV_CXXLINKFLAGS= 2785 fi 2786 2787 AC_SUBST(VTV_CXXFLAGS) 2788 AC_SUBST(VTV_PCH_CXXFLAGS) 2789 AC_SUBST(VTV_CXXLINKFLAGS) 2790 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes) 2791 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes) 2792]) 2793 2794dnl 2795dnl Check for parallel mode pre-requisites, including OpenMP support. 2796dnl 2797dnl + Usage: GLIBCXX_ENABLE_PARALLEL 2798dnl 2799AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [ 2800 2801 enable_parallel=no; 2802 2803 # See if configured libgomp/omp.h exists. (libgomp may be in 2804 # noconfigdirs but not explicitly disabled.) 2805 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then 2806 enable_parallel=yes; 2807 else 2808 AC_MSG_NOTICE([target-libgomp not built]) 2809 fi 2810 2811 AC_MSG_CHECKING([for parallel mode support]) 2812 AC_MSG_RESULT([$enable_parallel]) 2813]) 2814 2815 2816dnl 2817dnl Check for which I/O library to use: stdio, or something specific. 2818dnl 2819dnl Default is stdio. 2820dnl 2821AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [ 2822 AC_MSG_CHECKING([for underlying I/O to use]) 2823 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]], 2824 [use target-specific I/O package], [permit stdio]) 2825 2826 # Now that libio has been removed, you can have any color you want as long 2827 # as it's black. This is one big no-op until other packages are added, but 2828 # showing the framework never hurts. 2829 case ${enable_cstdio} in 2830 stdio) 2831 CSTDIO_H=config/io/c_io_stdio.h 2832 BASIC_FILE_H=config/io/basic_file_stdio.h 2833 BASIC_FILE_CC=config/io/basic_file_stdio.cc 2834 AC_MSG_RESULT(stdio) 2835 ;; 2836 esac 2837 2838 AC_SUBST(CSTDIO_H) 2839 AC_SUBST(BASIC_FILE_H) 2840 AC_SUBST(BASIC_FILE_CC) 2841]) 2842 2843 2844dnl 2845dnl Check for "unusual" flags to pass to the compiler while building. 2846dnl 2847dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing 2848dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc. 2849dnl --disable-cxx-flags passes nothing. 2850dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html 2851dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html 2852dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html 2853dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags) 2854dnl If "default flags" is an empty string, the effect is the same 2855dnl as --disable or --enable=no. 2856dnl 2857AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl 2858 AC_MSG_CHECKING([for extra compiler flags for building]) 2859 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS], 2860 [pass compiler FLAGS when building library], 2861 [case "x$enable_cxx_flags" in 2862 xno | x) enable_cxx_flags= ;; 2863 x-*) ;; 2864 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 2865 esac]) 2866 2867 # Run through flags (either default or command-line) and set anything 2868 # extra (e.g., #defines) that must accompany particular g++ options. 2869 if test -n "$enable_cxx_flags"; then 2870 for f in $enable_cxx_flags; do 2871 case "$f" in 2872 -fhonor-std) ;; 2873 -*) ;; 2874 *) # and we're trying to pass /what/ exactly? 2875 AC_MSG_ERROR([compiler flags start with a -]) ;; 2876 esac 2877 done 2878 fi 2879 2880 EXTRA_CXX_FLAGS="$enable_cxx_flags" 2881 AC_MSG_RESULT($EXTRA_CXX_FLAGS) 2882 AC_SUBST(EXTRA_CXX_FLAGS) 2883]) 2884 2885 2886dnl 2887dnl Check to see if debugging libraries are to be built. 2888dnl 2889dnl --enable-libstdcxx-debug 2890dnl builds a separate set of debugging libraries in addition to the 2891dnl normal (shared, static) libstdc++ binaries. 2892dnl 2893dnl --disable-libstdcxx-debug 2894dnl builds only one (non-debug) version of libstdc++. 2895dnl 2896dnl --enable-libstdcxx-debug-flags=FLAGS 2897dnl iff --enable-debug == yes, then use FLAGS to build the debug library. 2898dnl 2899dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)] 2900dnl Where DEFAULT is either `yes' or `no'. 2901dnl 2902AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [ 2903 AC_MSG_CHECKING([for additional debug build]) 2904 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library]) 2905 AC_MSG_RESULT($enable_libstdcxx_debug) 2906 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes) 2907]) 2908 2909 2910dnl 2911dnl Check for explicit debug flags. 2912dnl 2913dnl --enable-libstdcxx-debug-flags='-O1' 2914dnl is a general method for passing flags to be used when 2915dnl building debug libraries with --enable-libstdcxx-debug. 2916dnl 2917dnl --disable-libstdcxx-debug-flags does nothing. 2918dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags) 2919dnl If "default flags" is an empty string, the effect is the same 2920dnl as --disable or --enable=no. 2921dnl 2922AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [ 2923 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS], 2924 [pass compiler FLAGS when building debug library], 2925 [case "x$enable_libstdcxx_debug_flags" in 2926 xno | x) enable_libstdcxx_debug_flags= ;; 2927 x-*) ;; 2928 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;; 2929 esac]) 2930 2931 # Option parsed, now set things appropriately 2932 DEBUG_FLAGS="$enable_libstdcxx_debug_flags" 2933 AC_SUBST(DEBUG_FLAGS) 2934 2935 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS]) 2936]) 2937 2938 2939dnl 2940dnl Check if the user only wants a freestanding library implementation. 2941dnl 2942dnl --disable-hosted-libstdcxx will turn off most of the library build, 2943dnl installing only the headers required by [17.4.1.3] and the language 2944dnl support library. More than that will be built (to keep the Makefiles 2945dnl conveniently clean), but not installed. 2946dnl 2947dnl Sets: 2948dnl is_hosted (yes/no) 2949dnl 2950dnl Defines: 2951dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0) 2952dnl 2953AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [ 2954 AC_ARG_ENABLE([hosted-libstdcxx], 2955 AC_HELP_STRING([--disable-hosted-libstdcxx], 2956 [only build freestanding C++ runtime support]),, 2957 [case "$host" in 2958 arm*-*-symbianelf*) 2959 enable_hosted_libstdcxx=no 2960 ;; 2961 *) 2962 enable_hosted_libstdcxx=yes 2963 ;; 2964 esac]) 2965 if test "$enable_hosted_libstdcxx" = no; then 2966 AC_MSG_NOTICE([Only freestanding libraries will be built]) 2967 is_hosted=no 2968 hosted_define=0 2969 enable_abi_check=no 2970 enable_libstdcxx_pch=no 2971 else 2972 is_hosted=yes 2973 hosted_define=1 2974 fi 2975 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes) 2976 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define, 2977 [Define to 1 if a full hosted library is built, or 0 if freestanding.]) 2978]) 2979 2980 2981dnl 2982dnl Check if the user wants a non-verbose library implementation. 2983dnl 2984dnl --disable-libstdcxx-verbose will turn off descriptive messages to 2985dnl standard error on termination. 2986dnl 2987dnl Defines: 2988dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0) 2989dnl 2990AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [ 2991 AC_ARG_ENABLE([libstdcxx-verbose], 2992 AC_HELP_STRING([--disable-libstdcxx-verbose], 2993 [disable termination messages to standard error]),, 2994 [enable_libstdcxx_verbose=yes]) 2995 if test x"$enable_libstdcxx_verbose" = xyes; then 2996 verbose_define=1 2997 else 2998 AC_MSG_NOTICE([verbose termination messages are disabled]) 2999 verbose_define=0 3000 fi 3001 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define, 3002 [Define to 1 if a verbose library is built, or 0 otherwise.]) 3003]) 3004 3005 3006dnl 3007dnl Check for template specializations for the 'long long' type. 3008dnl The result determines only whether 'long long' I/O is enabled; things 3009dnl like numeric_limits<> specializations are always available. 3010dnl 3011dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG 3012dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined 3013dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)] 3014dnl Where DEFAULT is either `yes' or `no'. 3015dnl 3016AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [ 3017 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long']) 3018 if test $enable_long_long = yes; then 3019 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1, 3020 [Define if code specialized for long long should be used.]) 3021 fi 3022 AC_MSG_CHECKING([for enabled long long specializations]) 3023 AC_MSG_RESULT([$enable_long_long]) 3024]) 3025 3026 3027dnl 3028dnl Check for decimal floating point. 3029dnl See: 3030dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float 3031dnl 3032dnl This checks to see if the host supports decimal floating point types. 3033dnl 3034dnl Defines: 3035dnl _GLIBCXX_USE_DECIMAL_FLOAT 3036dnl 3037AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [ 3038 3039 # Fake what AC_TRY_COMPILE does, without linking as this is 3040 # unnecessary for this test. 3041 3042 cat > conftest.$ac_ext << EOF 3043[#]line __oline__ "configure" 3044int main() 3045{ 3046 _Decimal32 d1; 3047 _Decimal64 d2; 3048 _Decimal128 d3; 3049 return 0; 3050} 3051EOF 3052 3053 AC_MSG_CHECKING([for ISO/IEC TR 24733 ]) 3054 if AC_TRY_EVAL(ac_compile); then 3055 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1, 3056 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.]) 3057 enable_dfp=yes 3058 else 3059 enable_dfp=no 3060 fi 3061 AC_MSG_RESULT($enable_dfp) 3062 rm -f conftest* 3063]) 3064 3065dnl 3066dnl Check for GNU 128-bit integer and floating point types. 3067dnl 3068dnl Note: also checks that the types aren't standard types. 3069dnl 3070dnl Defines: 3071dnl _GLIBCXX_USE_INT128 3072dnl _GLIBCXX_USE_FLOAT128 3073dnl 3074AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [ 3075 3076 AC_LANG_SAVE 3077 AC_LANG_CPLUSPLUS 3078 3079 # Fake what AC_TRY_COMPILE does, without linking as this is 3080 # unnecessary for this test. 3081 3082 cat > conftest.$ac_ext << EOF 3083[#]line __oline__ "configure" 3084template<typename T1, typename T2> 3085 struct same 3086 { typedef T2 type; }; 3087 3088template<typename T> 3089 struct same<T, T>; 3090 3091int main() 3092{ 3093 typename same<long, __int128>::type i1; 3094 typename same<long long, __int128>::type i2; 3095} 3096EOF 3097 3098 AC_MSG_CHECKING([for __int128]) 3099 if AC_TRY_EVAL(ac_compile); then 3100 AC_DEFINE(_GLIBCXX_USE_INT128, 1, 3101 [Define if __int128 is supported on this host.]) 3102 enable_int128=yes 3103 else 3104 enable_int128=no 3105 fi 3106 AC_MSG_RESULT($enable_int128) 3107 rm -f conftest* 3108 3109 cat > conftest.$ac_ext << EOF 3110[#]line __oline__ "configure" 3111template<typename T1, typename T2> 3112 struct same 3113 { typedef T2 type; }; 3114 3115template<typename T> 3116 struct same<T, T>; 3117 3118int main() 3119{ 3120 typename same<double, __float128>::type f1; 3121 typename same<long double, __float128>::type f2; 3122} 3123EOF 3124 3125 AC_MSG_CHECKING([for __float128]) 3126 if AC_TRY_EVAL(ac_compile); then 3127 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1, 3128 [Define if __float128 is supported on this host.]) 3129 enable_float128=yes 3130 else 3131 enable_float128=no 3132 fi 3133 AC_MSG_RESULT($enable_float128) 3134 rm -f conftest* 3135 3136 AC_LANG_RESTORE 3137]) 3138 3139dnl 3140dnl Check for template specializations for the 'wchar_t' type. 3141dnl 3142dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T 3143dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined 3144dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)] 3145dnl Where DEFAULT is either `yes' or `no'. 3146dnl 3147dnl Necessary support must also be present. 3148dnl 3149AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [ 3150 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t']) 3151 3152 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos. 3153 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no) 3154 AC_MSG_CHECKING([for mbstate_t]) 3155 AC_TRY_COMPILE([#include <wchar.h>], 3156 [mbstate_t teststate;], 3157 have_mbstate_t=yes, have_mbstate_t=no) 3158 AC_MSG_RESULT($have_mbstate_t) 3159 if test x"$have_mbstate_t" = xyes; then 3160 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.]) 3161 fi 3162 3163 # Test it always, for use in GLIBCXX_ENABLE_C99, together with 3164 # ac_has_wchar_h. 3165 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no) 3166 3167 if test x"$enable_wchar_t" = x"yes"; then 3168 3169 AC_LANG_SAVE 3170 AC_LANG_CPLUSPLUS 3171 3172 if test x"$ac_has_wchar_h" = xyes && 3173 test x"$ac_has_wctype_h" = xyes; then 3174 AC_TRY_COMPILE([#include <wchar.h> 3175 #include <stddef.h> 3176 wint_t i; 3177 long l = WEOF; 3178 long j = WCHAR_MIN; 3179 long k = WCHAR_MAX; 3180 namespace test 3181 { 3182 using ::btowc; 3183 using ::fgetwc; 3184 using ::fgetws; 3185 using ::fputwc; 3186 using ::fputws; 3187 using ::fwide; 3188 using ::fwprintf; 3189 using ::fwscanf; 3190 using ::getwc; 3191 using ::getwchar; 3192 using ::mbrlen; 3193 using ::mbrtowc; 3194 using ::mbsinit; 3195 using ::mbsrtowcs; 3196 using ::putwc; 3197 using ::putwchar; 3198 using ::swprintf; 3199 using ::swscanf; 3200 using ::ungetwc; 3201 using ::vfwprintf; 3202 using ::vswprintf; 3203 using ::vwprintf; 3204 using ::wcrtomb; 3205 using ::wcscat; 3206 using ::wcschr; 3207 using ::wcscmp; 3208 using ::wcscoll; 3209 using ::wcscpy; 3210 using ::wcscspn; 3211 using ::wcsftime; 3212 using ::wcslen; 3213 using ::wcsncat; 3214 using ::wcsncmp; 3215 using ::wcsncpy; 3216 using ::wcspbrk; 3217 using ::wcsrchr; 3218 using ::wcsrtombs; 3219 using ::wcsspn; 3220 using ::wcsstr; 3221 using ::wcstod; 3222 using ::wcstok; 3223 using ::wcstol; 3224 using ::wcstoul; 3225 using ::wcsxfrm; 3226 using ::wctob; 3227 using ::wmemchr; 3228 using ::wmemcmp; 3229 using ::wmemcpy; 3230 using ::wmemmove; 3231 using ::wmemset; 3232 using ::wprintf; 3233 using ::wscanf; 3234 } 3235 ],[],[], [enable_wchar_t=no]) 3236 else 3237 enable_wchar_t=no 3238 fi 3239 3240 AC_LANG_RESTORE 3241 fi 3242 3243 if test x"$enable_wchar_t" = x"yes"; then 3244 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1, 3245 [Define if code specialized for wchar_t should be used.]) 3246 fi 3247 3248 AC_MSG_CHECKING([for enabled wchar_t specializations]) 3249 AC_MSG_RESULT([$enable_wchar_t]) 3250]) 3251 3252 3253dnl 3254dnl Check to see if building and using a C++ precompiled header can be done. 3255dnl 3256dnl --enable-libstdcxx-pch=yes 3257dnl default, this shows intent to use stdc++.h.gch If it looks like it 3258dnl may work, after some light-hearted attempts to puzzle out compiler 3259dnl support, flip bits on in include/Makefile.am 3260dnl 3261dnl --disable-libstdcxx-pch 3262dnl turns off attempts to use or build stdc++.h.gch. 3263dnl 3264dnl Substs: 3265dnl glibcxx_PCHFLAGS 3266dnl 3267AC_DEFUN([GLIBCXX_ENABLE_PCH], [ 3268 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers]) 3269 if test $enable_libstdcxx_pch = yes; then 3270 AC_CACHE_CHECK([for compiler with PCH support], 3271 [glibcxx_cv_prog_CXX_pch], 3272 [ac_save_CXXFLAGS="$CXXFLAGS" 3273 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated" 3274 AC_LANG_SAVE 3275 AC_LANG_CPLUSPLUS 3276 echo '#include <math.h>' > conftest.h 3277 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \ 3278 -o conftest.h.gch 1>&5 2>&1 && 3279 echo '#error "pch failed"' > conftest.h && 3280 echo '#include "conftest.h"' > conftest.cc && 3281 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ; 3282 then 3283 glibcxx_cv_prog_CXX_pch=yes 3284 else 3285 glibcxx_cv_prog_CXX_pch=no 3286 fi 3287 rm -f conftest* 3288 CXXFLAGS=$ac_save_CXXFLAGS 3289 AC_LANG_RESTORE 3290 ]) 3291 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch 3292 fi 3293 3294 AC_MSG_CHECKING([for enabled PCH]) 3295 AC_MSG_RESULT([$enable_libstdcxx_pch]) 3296 3297 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes) 3298 if test $enable_libstdcxx_pch = yes; then 3299 glibcxx_PCHFLAGS="-include bits/stdc++.h" 3300 else 3301 glibcxx_PCHFLAGS="" 3302 fi 3303 AC_SUBST(glibcxx_PCHFLAGS) 3304]) 3305 3306 3307dnl 3308dnl Check for atomic builtins. 3309dnl See: 3310dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html 3311dnl 3312dnl This checks to see if the host supports the compiler-generated 3313dnl builtins for atomic operations for various integral sizes. Note, this 3314dnl is intended to be an all-or-nothing switch, so all the atomic operations 3315dnl that are used should be checked. 3316dnl 3317dnl Note: 3318dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD. 3319dnl 3320AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [ 3321 AC_LANG_SAVE 3322 AC_LANG_CPLUSPLUS 3323 old_CXXFLAGS="$CXXFLAGS" 3324 3325 # Do link tests if possible, instead asm tests, limited to some platforms 3326 # see discussion in PR target/40134, PR libstdc++/40133 and the thread 3327 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html 3328 atomic_builtins_link_tests=no 3329 if test x$gcc_no_link != xyes; then 3330 # Can do link tests. Limit to some tested platforms 3331 case "$host" in 3332 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*) 3333 atomic_builtins_link_tests=yes 3334 ;; 3335 esac 3336 fi 3337 3338 if test x$atomic_builtins_link_tests = xyes; then 3339 3340 # Do link tests. 3341 3342 CXXFLAGS="$CXXFLAGS -fno-exceptions" 3343 3344 AC_MSG_CHECKING([for atomic builtins for bool]) 3345 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [ 3346 AC_TRY_LINK( 3347 [ ], 3348 [typedef bool atomic_type; 3349 atomic_type c1; 3350 atomic_type c2; 3351 atomic_type c3(0); 3352 // N.B. __atomic_fetch_add is not supported for bool. 3353 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3354 __ATOMIC_RELAXED); 3355 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3356 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3357 ], 3358 [glibcxx_cv_atomic_bool=yes], 3359 [glibcxx_cv_atomic_bool=no]) 3360 ]) 3361 AC_MSG_RESULT($glibcxx_cv_atomic_bool) 3362 3363 AC_MSG_CHECKING([for atomic builtins for short]) 3364 AC_CACHE_VAL(glibcxx_cv_atomic_short, [ 3365 AC_TRY_LINK( 3366 [ ], 3367 [typedef short atomic_type; 3368 atomic_type c1; 3369 atomic_type c2; 3370 atomic_type c3(0); 3371 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3372 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3373 __ATOMIC_RELAXED); 3374 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3375 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3376 ], 3377 [glibcxx_cv_atomic_short=yes], 3378 [glibcxx_cv_atomic_short=no]) 3379 ]) 3380 AC_MSG_RESULT($glibcxx_cv_atomic_short) 3381 3382 AC_MSG_CHECKING([for atomic builtins for int]) 3383 AC_CACHE_VAL(glibcxx_cv_atomic_int, [ 3384 AC_TRY_LINK( 3385 [ ], 3386 [typedef int atomic_type; 3387 atomic_type c1; 3388 atomic_type c2; 3389 atomic_type c3(0); 3390 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3391 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3392 __ATOMIC_RELAXED); 3393 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3394 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3395 ], 3396 [glibcxx_cv_atomic_int=yes], 3397 [glibcxx_cv_atomic_int=no]) 3398 ]) 3399 AC_MSG_RESULT($glibcxx_cv_atomic_int) 3400 3401 AC_MSG_CHECKING([for atomic builtins for long long]) 3402 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [ 3403 AC_TRY_LINK( 3404 [ ], 3405 [typedef long long atomic_type; 3406 atomic_type c1; 3407 atomic_type c2; 3408 atomic_type c3(0); 3409 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3410 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3411 __ATOMIC_RELAXED); 3412 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3413 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3414 ], 3415 [glibcxx_cv_atomic_long_long=yes], 3416 [glibcxx_cv_atomic_long_long=no]) 3417 ]) 3418 AC_MSG_RESULT($glibcxx_cv_atomic_long_long) 3419 3420 else 3421 3422 # Do asm tests. 3423 3424 # Compile unoptimized. 3425 CXXFLAGS='-O0 -S' 3426 3427 # Fake what AC_TRY_COMPILE does. 3428 3429 cat > conftest.$ac_ext << EOF 3430[#]line __oline__ "configure" 3431int main() 3432{ 3433 typedef bool atomic_type; 3434 atomic_type c1; 3435 atomic_type c2; 3436 atomic_type c3(0); 3437 // N.B. __atomic_fetch_add is not supported for bool. 3438 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3439 __ATOMIC_RELAXED); 3440 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3441 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3442 3443 return 0; 3444} 3445EOF 3446 3447 AC_MSG_CHECKING([for atomic builtins for bool]) 3448 if AC_TRY_EVAL(ac_compile); then 3449 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3450 glibcxx_cv_atomic_bool=no 3451 else 3452 glibcxx_cv_atomic_bool=yes 3453 fi 3454 fi 3455 AC_MSG_RESULT($glibcxx_cv_atomic_bool) 3456 rm -f conftest* 3457 3458 cat > conftest.$ac_ext << EOF 3459[#]line __oline__ "configure" 3460int main() 3461{ 3462 typedef short atomic_type; 3463 atomic_type c1; 3464 atomic_type c2; 3465 atomic_type c3(0); 3466 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3467 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3468 __ATOMIC_RELAXED); 3469 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3470 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3471 3472 return 0; 3473} 3474EOF 3475 3476 AC_MSG_CHECKING([for atomic builtins for short]) 3477 if AC_TRY_EVAL(ac_compile); then 3478 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3479 glibcxx_cv_atomic_short=no 3480 else 3481 glibcxx_cv_atomic_short=yes 3482 fi 3483 fi 3484 AC_MSG_RESULT($glibcxx_cv_atomic_short) 3485 rm -f conftest* 3486 3487 cat > conftest.$ac_ext << EOF 3488[#]line __oline__ "configure" 3489int main() 3490{ 3491 // NB: _Atomic_word not necessarily int. 3492 typedef int atomic_type; 3493 atomic_type c1; 3494 atomic_type c2; 3495 atomic_type c3(0); 3496 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3497 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3498 __ATOMIC_RELAXED); 3499 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3500 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3501 3502 return 0; 3503} 3504EOF 3505 3506 AC_MSG_CHECKING([for atomic builtins for int]) 3507 if AC_TRY_EVAL(ac_compile); then 3508 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3509 glibcxx_cv_atomic_int=no 3510 else 3511 glibcxx_cv_atomic_int=yes 3512 fi 3513 fi 3514 AC_MSG_RESULT($glibcxx_cv_atomic_int) 3515 rm -f conftest* 3516 3517 cat > conftest.$ac_ext << EOF 3518[#]line __oline__ "configure" 3519int main() 3520{ 3521 typedef long long atomic_type; 3522 atomic_type c1; 3523 atomic_type c2; 3524 atomic_type c3(0); 3525 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED); 3526 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL, 3527 __ATOMIC_RELAXED); 3528 __atomic_test_and_set(&c1, __ATOMIC_RELAXED); 3529 __atomic_load_n(&c1, __ATOMIC_RELAXED); 3530 3531 return 0; 3532} 3533EOF 3534 3535 AC_MSG_CHECKING([for atomic builtins for long long]) 3536 if AC_TRY_EVAL(ac_compile); then 3537 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then 3538 glibcxx_cv_atomic_long_long=no 3539 else 3540 glibcxx_cv_atomic_long_long=yes 3541 fi 3542 fi 3543 AC_MSG_RESULT($glibcxx_cv_atomic_long_long) 3544 rm -f conftest* 3545 3546 fi 3547 3548 CXXFLAGS="$old_CXXFLAGS" 3549 AC_LANG_RESTORE 3550 3551 # Set atomicity_dir to builtins if all but the long long test above passes, 3552 # or if the builtins were already chosen (e.g. by configure.host). 3553 if { test "$glibcxx_cv_atomic_bool" = yes \ 3554 && test "$glibcxx_cv_atomic_short" = yes \ 3555 && test "$glibcxx_cv_atomic_int" = yes; } \ 3556 || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then 3557 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1, 3558 [Define if the compiler supports C++11 atomics.]) 3559 atomicity_dir=cpu/generic/atomicity_builtins 3560 fi 3561 3562 # If still generic, set to mutex. 3563 if test $atomicity_dir = "cpu/generic" ; then 3564 atomicity_dir=cpu/generic/atomicity_mutex 3565 AC_MSG_WARN([No native atomic operations are provided for this platform.]) 3566 if test "x$target_thread_file" = xsingle; then 3567 AC_MSG_WARN([They cannot be faked when thread support is disabled.]) 3568 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.]) 3569 else 3570 AC_MSG_WARN([They will be faked using a mutex.]) 3571 AC_MSG_WARN([Performance of certain classes will degrade as a result.]) 3572 fi 3573 fi 3574 3575]) 3576 3577 3578dnl 3579dnl Allow visibility attributes to be used on namespaces, objects, etc. 3580dnl 3581dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes. 3582dnl --disable-libstdcxx-visibility turns off all use of visibility attributes. 3583dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)] 3584dnl Where DEFAULT is 'yes'. 3585dnl 3586AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [ 3587GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage]) 3588 3589if test x$enable_libstdcxx_visibility = xyes ; then 3590 dnl all hail libgfortran 3591 dnl Check whether the target supports hidden visibility. 3592 AC_CACHE_CHECK([whether the target supports hidden visibility], 3593 glibcxx_cv_have_attribute_visibility, [ 3594 save_CFLAGS="$CFLAGS" 3595 CFLAGS="$CFLAGS -Werror" 3596 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }], 3597 [], glibcxx_cv_have_attribute_visibility=yes, 3598 glibcxx_cv_have_attribute_visibility=no) 3599 CFLAGS="$save_CFLAGS"]) 3600 if test $glibcxx_cv_have_attribute_visibility = no; then 3601 enable_libstdcxx_visibility=no 3602 fi 3603fi 3604 3605GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes) 3606AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility]) 3607]) 3608 3609 3610dnl 3611dnl Add version tags to symbols in shared library (or not), additionally 3612dnl marking other symbols as private/local (or not). 3613dnl 3614dnl Sets libtool_VERSION, and determines shared library SONAME. 3615dnl 3616dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no. 3617dnl 3618dnl --enable-symvers=style adds a version script to the linker call when 3619dnl creating the shared library. The choice of version script is 3620dnl controlled by 'style'. 3621dnl --disable-symvers does not. 3622dnl 3623dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)] 3624dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to 3625dnl choose a default style based on linker characteristics. Passing 3626dnl 'no' disables versioning. 3627dnl 3628AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [ 3629 3630GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]], 3631 [enables symbol versioning of the shared library], 3632 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun]) 3633 3634# If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we 3635# don't know enough about $LD to do tricks... 3636AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES]) 3637# Sun style symbol versions needs GNU c++filt for make_sunver.pl to work 3638# with extern "C++" in version scripts. 3639AC_REQUIRE([GCC_PROG_GNU_CXXFILT]) 3640 3641# Turn a 'yes' into a suitable default. 3642if test x$enable_symvers = xyes ; then 3643 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then 3644 enable_symvers=no 3645 else 3646 if test $with_gnu_ld = yes ; then 3647 case ${target_os} in 3648 hpux*) 3649 enable_symvers=no ;; 3650 *) 3651 enable_symvers=gnu ;; 3652 esac 3653 else 3654 case ${target_os} in 3655 darwin*) 3656 enable_symvers=darwin ;; 3657 # Sun symbol versioning exists since Solaris 2.5. 3658 solaris2.[[5-9]]* | solaris2.1[[0-9]]*) 3659 # make_sunver.pl needs GNU c++filt to support extern "C++" in 3660 # version scripts, so disable symbol versioning if none can be 3661 # found. 3662 if test -z "$ac_cv_path_CXXFILT"; then 3663 AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) 3664 AC_MSG_WARN([=== no GNU c++filt could be found.]) 3665 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3666 enable_symvers=no 3667 else 3668 enable_symvers=sun 3669 fi 3670 ;; 3671 *) 3672 enable_symvers=no ;; 3673 esac 3674 fi 3675 fi 3676fi 3677 3678# Check to see if 'darwin' or 'darwin-export' can win. 3679if test x$enable_symvers = xdarwin-export ; then 3680 enable_symvers=darwin 3681fi 3682 3683# Check if 'sun' was requested on non-Solaris 2 platforms. 3684if test x$enable_symvers = xsun ; then 3685 case ${target_os} in 3686 solaris2*) 3687 # All fine. 3688 ;; 3689 *) 3690 # Unlikely to work. 3691 AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) 3692 AC_MSG_WARN([=== you are not targetting Solaris 2.]) 3693 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3694 enable_symvers=no 3695 ;; 3696 esac 3697fi 3698 3699# Check to see if 'gnu' can win. 3700if test $enable_symvers = gnu || 3701 test $enable_symvers = gnu-versioned-namespace || 3702 test $enable_symvers = sun; then 3703 # Check to see if libgcc_s exists, indicating that shared libgcc is possible. 3704 AC_MSG_CHECKING([for shared libgcc]) 3705 ac_save_CFLAGS="$CFLAGS" 3706 CFLAGS=' -lgcc_s' 3707 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no) 3708 CFLAGS="$ac_save_CFLAGS" 3709 if test $glibcxx_shared_libgcc = no; then 3710 cat > conftest.c <<EOF 3711int main (void) { return 0; } 3712EOF 3713changequote(,)dnl 3714 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ 3715 -shared -shared-libgcc -o conftest.so \ 3716 conftest.c -v 2>&1 >/dev/null \ 3717 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` 3718changequote([,])dnl 3719 rm -f conftest.c conftest.so 3720 if test x${glibcxx_libgcc_s_suffix+set} = xset; then 3721 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix" 3722 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes) 3723 CFLAGS="$ac_save_CFLAGS" 3724 fi 3725 fi 3726 AC_MSG_RESULT($glibcxx_shared_libgcc) 3727 3728 # For GNU ld, we need at least this version. The format is described in 3729 # GLIBCXX_CHECK_LINKER_FEATURES above. 3730 glibcxx_min_gnu_ld_version=21400 3731 3732 # If no shared libgcc, can't win. 3733 if test $glibcxx_shared_libgcc != yes; then 3734 AC_MSG_WARN([=== You have requested GNU symbol versioning, but]) 3735 AC_MSG_WARN([=== you are not building a shared libgcc_s.]) 3736 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3737 enable_symvers=no 3738 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then 3739 : All interesting versions of Sun ld support sun style symbol versioning. 3740 elif test $with_gnu_ld != yes ; then 3741 # just fail for now 3742 AC_MSG_WARN([=== You have requested GNU symbol versioning, but]) 3743 AC_MSG_WARN([=== you are not using the GNU linker.]) 3744 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3745 enable_symvers=no 3746 elif test $glibcxx_ld_is_gold = yes ; then 3747 : All versions of gold support symbol versioning. 3748 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then 3749 # The right tools, the right setup, but too old. Fallbacks? 3750 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for) 3751 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.) 3752 AC_MSG_WARN(=== You would need to upgrade your binutils to version) 3753 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.) 3754 AC_MSG_WARN([=== Symbol versioning will be disabled.]) 3755 enable_symvers=no 3756 fi 3757fi 3758 3759# For libtool versioning info, format is CURRENT:REVISION:AGE 3760libtool_VERSION=6:22:0 3761 3762# Everything parsed; figure out what files and settings to use. 3763case $enable_symvers in 3764 no) 3765 SYMVER_FILE=config/abi/pre/none.ver 3766 ;; 3767 gnu) 3768 SYMVER_FILE=config/abi/pre/gnu.ver 3769 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1, 3770 [Define to use GNU versioning in the shared library.]) 3771 ;; 3772 gnu-versioned-namespace) 3773 libtool_VERSION=7:0:0 3774 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver 3775 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1, 3776 [Define to use GNU namespace versioning in the shared library.]) 3777 ;; 3778 darwin) 3779 SYMVER_FILE=config/abi/pre/gnu.ver 3780 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1, 3781 [Define to use darwin versioning in the shared library.]) 3782 ;; 3783 sun) 3784 SYMVER_FILE=config/abi/pre/gnu.ver 3785 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1, 3786 [Define to use Sun versioning in the shared library.]) 3787 ;; 3788esac 3789 3790if test x$enable_symvers != xno ; then 3791 AC_DEFINE(_GLIBCXX_SYMVER, 1, 3792 [Define to use symbol versioning in the shared library.]) 3793fi 3794 3795AC_CACHE_CHECK([whether the target supports .symver directive], 3796 glibcxx_cv_have_as_symver_directive, [ 3797 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");], 3798 [], glibcxx_cv_have_as_symver_directive=yes, 3799 glibcxx_cv_have_as_symver_directive=no)]) 3800if test $glibcxx_cv_have_as_symver_directive = yes; then 3801 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1, 3802 [Define to 1 if the target assembler supports .symver directive.]) 3803fi 3804 3805AC_SUBST(SYMVER_FILE) 3806AC_SUBST(port_specific_symbol_files) 3807GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no) 3808GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu) 3809GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace) 3810GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin) 3811GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun) 3812AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers) 3813 3814if test $enable_symvers != no ; then 3815 case ${target_os} in 3816 # The Solaris 2 runtime linker doesn't support the GNU extension of 3817 # binding the same symbol to different versions 3818 solaris2*) 3819 ;; 3820 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do. 3821 *) 3822 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1, 3823 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.]) 3824 ;; 3825 esac 3826fi 3827 3828# Now, set up compatibility support, if any. 3829# In addition, need this to deal with std::size_t mangling in 3830# src/compatibility.cc. In a perfect world, could use 3831# typeid(std::size_t).name()[0] to do direct substitution. 3832AC_MSG_CHECKING([for size_t as unsigned int]) 3833ac_save_CFLAGS="$CFLAGS" 3834CFLAGS="-Werror" 3835AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;], 3836 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no]) 3837CFLAGS=$ac_save_CFLAGS 3838if test "$glibcxx_size_t_is_i" = yes; then 3839 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.]) 3840fi 3841AC_MSG_RESULT([$glibcxx_size_t_is_i]) 3842 3843AC_MSG_CHECKING([for ptrdiff_t as int]) 3844ac_save_CFLAGS="$CFLAGS" 3845CFLAGS="-Werror" 3846AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;], 3847 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no]) 3848CFLAGS=$ac_save_CFLAGS 3849if test "$glibcxx_ptrdiff_t_is_i" = yes; then 3850 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.]) 3851fi 3852AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i]) 3853]) 3854 3855 3856dnl 3857dnl Setup to use the gcc gthr.h thread-specific memory and mutex model. 3858dnl We must stage the required headers so that they will be installed 3859dnl with the library (unlike libgcc, the STL implementation is provided 3860dnl solely within headers). Since we must not inject random user-space 3861dnl macro names into user-provided C++ code, we first stage into <file>-in 3862dnl and process to <file> with an output command. The reason for a two- 3863dnl stage process here is to correctly handle $srcdir!=$objdir without 3864dnl having to write complex code (the sed commands to clean the macro 3865dnl namespace are complex and fragile enough as it is). We must also 3866dnl add a relative path so that -I- is supported properly. 3867dnl 3868dnl Substs: 3869dnl thread_header 3870dnl 3871AC_DEFUN([GLIBCXX_ENABLE_THREADS], [ 3872 AC_MSG_CHECKING([for thread model used by GCC]) 3873 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` 3874 AC_MSG_RESULT([$target_thread_file]) 3875 GCC_AC_THREAD_HEADER([$target_thread_file]) 3876]) 3877 3878 3879dnl 3880dnl Check if gthread implementation defines the types and functions 3881dnl required by the c++0x thread library. Conforming gthread 3882dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x. 3883dnl 3884dnl GLIBCXX_ENABLE_SYMVERS must be done before this. 3885dnl 3886AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [ 3887 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support]) 3888 3889 if test x$enable_libstdcxx_threads = xauto || 3890 test x$enable_libstdcxx_threads = xyes; then 3891 3892 AC_LANG_SAVE 3893 AC_LANG_CPLUSPLUS 3894 3895 ac_save_CXXFLAGS="$CXXFLAGS" 3896 CXXFLAGS="$CXXFLAGS -fno-exceptions \ 3897 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc" 3898 3899 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'` 3900 case $target_thread_file in 3901 posix) 3902 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS" 3903 esac 3904 3905 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available]) 3906 3907 AC_TRY_COMPILE([#include <unistd.h>], 3908 [ 3909 // In case of POSIX threads check _POSIX_TIMEOUTS. 3910 #if (defined(_PTHREADS) \ 3911 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0)) 3912 #error 3913 #endif 3914 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0]) 3915 3916 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock, 3917 [Define to 1 if mutex_timedlock is available.]) 3918 3919 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ; 3920 else res_mutex_timedlock=no ; fi 3921 AC_MSG_RESULT([$res_mutex_timedlock]) 3922 3923 AC_MSG_CHECKING([for gthreads library]) 3924 3925 AC_TRY_COMPILE([#include "gthr.h"], 3926 [ 3927 #ifndef __GTHREADS_CXX0X 3928 #error 3929 #endif 3930 ], [ac_has_gthreads=yes], [ac_has_gthreads=no]) 3931 else 3932 ac_has_gthreads=no 3933 fi 3934 3935 AC_MSG_RESULT([$ac_has_gthreads]) 3936 3937 if test x"$ac_has_gthreads" = x"yes"; then 3938 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1, 3939 [Define if gthreads library is available.]) 3940 3941 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14 3942 AC_CHECK_TYPE([pthread_rwlock_t], 3943 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1, 3944 [Define if POSIX read/write locks are available in <gthr.h>.])], 3945 [], 3946 [#include "gthr.h"]) 3947 fi 3948 3949 CXXFLAGS="$ac_save_CXXFLAGS" 3950 AC_LANG_RESTORE 3951]) 3952 3953 3954# Check whether LC_MESSAGES is available in <locale.h>. 3955# Ulrich Drepper <drepper@cygnus.com>, 1995. 3956# 3957# This file file be copied and used freely without restrictions. It can 3958# be used in projects which are not available under the GNU Public License 3959# but which still want to provide support for the GNU gettext functionality. 3960# Please note that the actual code is *not* freely available. 3961AC_DEFUN([AC_LC_MESSAGES], [ 3962 AC_CHECK_HEADER(locale.h, [ 3963 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES, 3964 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES], 3965 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)]) 3966 if test $ac_cv_val_LC_MESSAGES = yes; then 3967 AC_DEFINE(HAVE_LC_MESSAGES, 1, 3968 [Define if LC_MESSAGES is available in <locale.h>.]) 3969 fi 3970 ]) 3971]) 3972 3973dnl 3974dnl Check whether rdrand is supported in the assembler. 3975AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [ 3976 AC_MSG_CHECKING([for rdrand support in assembler]) 3977 AC_CACHE_VAL(ac_cv_x86_rdrand, [ 3978 ac_cv_x86_rdrand=no 3979 case "$target" in 3980 i?86-*-* | \ 3981 x86_64-*-*) 3982 AC_TRY_COMPILE(, [asm("rdrand %eax");], 3983 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no]) 3984 esac 3985 ]) 3986 if test $ac_cv_x86_rdrand = yes; then 3987 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1, 3988 [ Defined if as can handle rdrand. ]) 3989 fi 3990 AC_MSG_RESULT($ac_cv_x86_rdrand) 3991]) 3992 3993dnl 3994dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS. 3995dnl 3996AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [ 3997 3998 AC_LANG_SAVE 3999 AC_LANG_CPLUSPLUS 4000 ac_save_CXXFLAGS="$CXXFLAGS" 4001 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4002 4003 AC_MSG_CHECKING([for get_nprocs]) 4004 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [ 4005 GCC_TRY_COMPILE_OR_LINK( 4006 [#include <sys/sysinfo.h>], 4007 [int n = get_nprocs();], 4008 [glibcxx_cv_GET_NPROCS=yes], 4009 [glibcxx_cv_GET_NPROCS=no]) 4010 ]) 4011 if test $glibcxx_cv_GET_NPROCS = yes; then 4012 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.]) 4013 fi 4014 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS) 4015 4016 CXXFLAGS="$ac_save_CXXFLAGS" 4017 AC_LANG_RESTORE 4018]) 4019 4020dnl 4021dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN. 4022dnl 4023AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [ 4024 4025 AC_LANG_SAVE 4026 AC_LANG_CPLUSPLUS 4027 ac_save_CXXFLAGS="$CXXFLAGS" 4028 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4029 4030 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN]) 4031 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [ 4032 GCC_TRY_COMPILE_OR_LINK( 4033 [#include <unistd.h>], 4034 [int n = sysconf(_SC_NPROCESSORS_ONLN);], 4035 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes], 4036 [glibcxx_cv_SC_NPROCESSORS_ONLN=no]) 4037 ]) 4038 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then 4039 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.]) 4040 fi 4041 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN) 4042 4043 CXXFLAGS="$ac_save_CXXFLAGS" 4044 AC_LANG_RESTORE 4045]) 4046 4047dnl 4048dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN. 4049dnl 4050AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [ 4051 4052 AC_LANG_SAVE 4053 AC_LANG_CPLUSPLUS 4054 ac_save_CXXFLAGS="$CXXFLAGS" 4055 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4056 4057 AC_MSG_CHECKING([for _SC_NPROC_ONLN]) 4058 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [ 4059 GCC_TRY_COMPILE_OR_LINK( 4060 [#include <unistd.h>], 4061 [int n = sysconf(_SC_NPROC_ONLN);], 4062 [glibcxx_cv_SC_NPROC_ONLN=yes], 4063 [glibcxx_cv_SC_NPROC_ONLN=no]) 4064 ]) 4065 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then 4066 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.]) 4067 fi 4068 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN) 4069 4070 CXXFLAGS="$ac_save_CXXFLAGS" 4071 AC_LANG_RESTORE 4072]) 4073 4074dnl 4075dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP. 4076dnl 4077AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [ 4078 4079 AC_LANG_SAVE 4080 AC_LANG_CPLUSPLUS 4081 ac_save_CXXFLAGS="$CXXFLAGS" 4082 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4083 4084 AC_MSG_CHECKING([for pthreads_num_processors_np]) 4085 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [ 4086 GCC_TRY_COMPILE_OR_LINK( 4087 [#include <pthread.h>], 4088 [int n = pthread_num_processors_np();], 4089 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes], 4090 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no]) 4091 ]) 4092 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then 4093 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.]) 4094 fi 4095 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP) 4096 4097 CXXFLAGS="$ac_save_CXXFLAGS" 4098 AC_LANG_RESTORE 4099]) 4100 4101dnl 4102dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU. 4103dnl 4104AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [ 4105 4106 AC_LANG_SAVE 4107 AC_LANG_CPLUSPLUS 4108 ac_save_CXXFLAGS="$CXXFLAGS" 4109 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4110 4111 AC_MSG_CHECKING([for hw.ncpu sysctl]) 4112 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [ 4113 GCC_TRY_COMPILE_OR_LINK( 4114 [ 4115 #include <stddef.h> 4116 #include <sys/sysctl.h> 4117 ], 4118 [ 4119 int count; 4120 size_t size = sizeof(count); 4121 int mib[] = { CTL_HW, HW_NCPU }; 4122 sysctl(mib, 2, &count, &size, NULL, 0); 4123 ], 4124 [glibcxx_cv_SYSCTL_HW_NCPU=yes], 4125 [glibcxx_cv_SYSCTL_HW_NCPU=no]) 4126 ]) 4127 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then 4128 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.]) 4129 fi 4130 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU) 4131 4132 CXXFLAGS="$ac_save_CXXFLAGS" 4133 AC_LANG_RESTORE 4134]) 4135 4136dnl 4137dnl Check to see if python pretty printing can be activated. 4138dnl 4139dnl --with-python-dir=dir 4140dnl installs directory into $prefix/dir 4141AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [ 4142 4143AC_MSG_CHECKING([for custom python install directory]) 4144AC_ARG_WITH([python-dir], 4145 AS_HELP_STRING([--with-python-dir], 4146 [the location to install Python modules. This path is relative starting from the prefix.]), 4147 [with_python_dir=$withval], [with_python_dir="no"]) 4148AC_MSG_RESULT(${with_python_dir}) 4149 4150# Needed for installing Python modules during make install. 4151python_mod_dir="${with_python_dir}" 4152AC_SUBST(python_mod_dir) 4153GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no) 4154]) 4155 4156dnl 4157dnl Check to see if -Werror is disabled. 4158dnl 4159dnl --enable-werror/--disable-werror 4160AC_DEFUN([GLIBCXX_ENABLE_WERROR], [ 4161 AC_MSG_CHECKING([for -Werror]) 4162 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror]) 4163 AC_MSG_RESULT($enable_werror) 4164 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes) 4165]) 4166 4167dnl 4168dnl Check whether obsolescent tmpnam is available in <stdio.h>, 4169dnl and define _GLIBCXX_USE_TMPNAM. 4170dnl 4171AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl 4172dnl 4173 AC_LANG_SAVE 4174 AC_LANG_CPLUSPLUS 4175 ac_save_CXXFLAGS="$CXXFLAGS" 4176 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4177dnl 4178 AC_MSG_CHECKING([for tmpnam]) 4179 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl 4180 GCC_TRY_COMPILE_OR_LINK( 4181 [#include <stdio.h>], 4182 [char *tmp = tmpnam(NULL);], 4183 [glibcxx_cv_TMPNAM=yes], 4184 [glibcxx_cv_TMPNAM=no]) 4185 ]) 4186 if test $glibcxx_cv_TMPNAM = yes; then 4187 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.]) 4188 fi 4189 AC_MSG_RESULT($glibcxx_cv_TMPNAM) 4190dnl 4191 CXXFLAGS="$ac_save_CXXFLAGS" 4192 AC_LANG_RESTORE 4193]) 4194 4195dnl 4196dnl Check to see if sys/sdt.h exists and that it is suitable for use. 4197dnl Some versions of sdt.h were not compatible with C++11. 4198dnl 4199AC_DEFUN([GLIBCXX_CHECK_SDT_H], [ 4200 AC_MSG_CHECKING([for suitable sys/sdt.h]) 4201 # Note that this test has to be run with the C language. 4202 # Otherwise, sdt.h will try to include some headers from 4203 # libstdc++ itself. 4204 AC_LANG_SAVE 4205 AC_LANG_C 4206 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [ 4207 # Because we have to run the test in C, we use grep rather 4208 # than the compiler to check for the bug. The bug is that 4209 # were strings without trailing whitespace, causing g++ 4210 # to look for operator"". The pattern searches for the fixed 4211 # output. 4212 AC_EGREP_CPP([ \",\" ], [ 4213 #include <sys/sdt.h> 4214 int f() { STAP_PROBE(hi, bob); } 4215 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no]) 4216 ]) 4217 AC_LANG_RESTORE 4218 if test $glibcxx_cv_sys_sdt_h = yes; then 4219 AC_DEFINE(HAVE_SYS_SDT_H, 1, 4220 [Define to 1 if you have a suitable <sys/sdt.h> header file]) 4221 fi 4222 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h) 4223]) 4224 4225dnl 4226dnl Control whether the library should define symbols for old and new ABIs. 4227dnl This affects definitions of strings, stringstreams and locale facets. 4228dnl 4229dnl --disable-libstdcxx-dual-abi will use old ABI for all types. 4230dnl 4231dnl Defines: 4232dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0) 4233dnl 4234AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [ 4235 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string]) 4236 if test x$enable_symvers = xgnu-versioned-namespace; then 4237 # gnu-versioned-namespace is incompatible with the dual ABI. 4238 enable_libstdcxx_dual_abi="no" 4239 fi 4240 if test x"$enable_libstdcxx_dual_abi" != xyes; then 4241 AC_MSG_NOTICE([dual ABI is disabled]) 4242 default_libstdcxx_abi="gcc4-compatible" 4243 fi 4244 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes) 4245]) 4246 4247dnl 4248dnl Check to see which ABI should be enabled by default. 4249dnl 4250dnl --with-default-libstdcxx-abi={gcc4-compatible,new} 4251dnl 4252dnl Defines: 4253dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0) 4254dnl 4255AC_DEFUN([GLIBCXX_DEFAULT_ABI], [ 4256 if test x$enable_libstdcxx_dual_abi = xyes; then 4257 AC_MSG_CHECKING([for default std::string ABI to use]) 4258 AC_ARG_WITH([default-libstdcxx-abi], 4259 AS_HELP_STRING([--with-default-libstdcxx-abi], 4260 [set the std::string ABI to use by default]), 4261 [case "$withval" in 4262 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;; 4263 new|cxx11) default_libstdcxx_abi="new" ;; 4264 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;; 4265 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;; 4266 esac 4267 ], 4268 [default_libstdcxx_abi="new"]) 4269 AC_MSG_RESULT(${default_libstdcxx_abi}) 4270 fi 4271 if test $default_libstdcxx_abi = "new"; then 4272 glibcxx_cxx11_abi=1 4273 glibcxx_cxx98_abi=0 4274 else 4275 glibcxx_cxx11_abi=0 4276 glibcxx_cxx98_abi=1 4277 fi 4278 AC_SUBST(glibcxx_cxx98_abi) 4279 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1) 4280]) 4281 4282dnl 4283dnl Check to see whether to build libstdc++fs.a 4284dnl 4285dnl --enable-libstdcxx-filesystem-ts 4286dnl 4287AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [ 4288 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,, 4289 [turns on ISO/IEC TS 18822 support], 4290 [permit yes|no|auto]) 4291 4292 AC_MSG_CHECKING([whether to build Filesystem TS support]) 4293 if test x"$ac_cv_header_dirent_h" != x"yes"; then 4294 enable_libstdcxx_filesystem_ts=no 4295 fi 4296 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then 4297 case "${target_os}" in 4298 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*) 4299 enable_libstdcxx_filesystem_ts=yes 4300 ;; 4301 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) 4302 enable_libstdcxx_filesystem_ts=yes 4303 ;; 4304 solaris*) 4305 enable_libstdcxx_filesystem_ts=yes 4306 ;; 4307 *) 4308 enable_libstdcxx_filesystem_ts=no 4309 ;; 4310 esac 4311 fi 4312 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts) 4313 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes) 4314]) 4315 4316dnl 4317dnl Check whether the library calls required by the Filesystem TS are present 4318dnl and define _GLIBCXX_USE_REALPATH and _GLIBCXX_USE_UTIMENSAT. 4319dnl 4320AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl 4321dnl 4322 AC_LANG_SAVE 4323 AC_LANG_CPLUSPLUS 4324 ac_save_CXXFLAGS="$CXXFLAGS" 4325 CXXFLAGS="$CXXFLAGS -fno-exceptions" 4326dnl 4327 AC_MSG_CHECKING([for struct dirent.d_type]) 4328 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl 4329 GCC_TRY_COMPILE_OR_LINK( 4330 [#include <dirent.h>], 4331 [ 4332 struct dirent d; 4333 if (sizeof d.d_type) return 0; 4334 ], 4335 [glibcxx_cv_dirent_d_type=yes], 4336 [glibcxx_cv_dirent_d_type=no]) 4337 ]) 4338 if test $glibcxx_cv_dirent_d_type = yes; then 4339 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.]) 4340 fi 4341 AC_MSG_RESULT($glibcxx_cv_dirent_d_type) 4342dnl 4343 AC_MSG_CHECKING([for realpath]) 4344 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl 4345 GCC_TRY_COMPILE_OR_LINK( 4346 [ 4347 #include <limits.h> 4348 #include <stdlib.h> 4349 #include <unistd.h> 4350 ], 4351 [ 4352 #if _XOPEN_VERSION < 500 4353 #error 4354 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX) 4355 char *tmp = realpath((const char*)NULL, (char*)NULL); 4356 #else 4357 #error 4358 #endif 4359 ], 4360 [glibcxx_cv_realpath=yes], 4361 [glibcxx_cv_realpath=no]) 4362 ]) 4363 if test $glibcxx_cv_realpath = yes; then 4364 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.]) 4365 fi 4366 AC_MSG_RESULT($glibcxx_cv_realpath) 4367dnl 4368 AC_MSG_CHECKING([for utimensat]) 4369 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl 4370 GCC_TRY_COMPILE_OR_LINK( 4371 [ 4372 #include <fcntl.h> 4373 #include <sys/stat.h> 4374 ], 4375 [ 4376 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } }; 4377 int i = utimensat(AT_FDCWD, "path", ts, 0); 4378 ], 4379 [glibcxx_cv_utimensat=yes], 4380 [glibcxx_cv_utimensat=no]) 4381 ]) 4382 if test $glibcxx_cv_utimensat = yes; then 4383 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.]) 4384 fi 4385 AC_MSG_RESULT($glibcxx_cv_utimensat) 4386dnl 4387 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec]) 4388 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl 4389 GCC_TRY_COMPILE_OR_LINK( 4390 [ #include <sys/stat.h> ], 4391 [ 4392 struct stat st; 4393 return st.st_mtim.tv_nsec; 4394 ], 4395 [glibcxx_cv_st_mtim=yes], 4396 [glibcxx_cv_st_mtim=no]) 4397 ]) 4398 if test $glibcxx_cv_st_mtim = yes; then 4399 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.]) 4400 fi 4401 AC_MSG_RESULT($glibcxx_cv_st_mtim) 4402dnl 4403 AC_MSG_CHECKING([for fchmod]) 4404 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl 4405 GCC_TRY_COMPILE_OR_LINK( 4406 [#include <sys/stat.h>], 4407 [fchmod(1, S_IWUSR);], 4408 [glibcxx_cv_fchmod=yes], 4409 [glibcxx_cv_fchmod=no]) 4410 ]) 4411 if test $glibcxx_cv_fchmod = yes; then 4412 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.]) 4413 fi 4414 AC_MSG_RESULT($glibcxx_cv_fchmod) 4415dnl 4416 AC_MSG_CHECKING([for fchmodat]) 4417 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl 4418 GCC_TRY_COMPILE_OR_LINK( 4419 [ 4420 #include <fcntl.h> 4421 #include <sys/stat.h> 4422 ], 4423 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);], 4424 [glibcxx_cv_fchmodat=yes], 4425 [glibcxx_cv_fchmodat=no]) 4426 ]) 4427 if test $glibcxx_cv_fchmodat = yes; then 4428 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.]) 4429 fi 4430 AC_MSG_RESULT($glibcxx_cv_fchmodat) 4431dnl 4432 AC_MSG_CHECKING([for sendfile that can copy files]) 4433 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl 4434 case "${target_os}" in 4435 gnu* | linux* | solaris*) 4436 GCC_TRY_COMPILE_OR_LINK( 4437 [#include <sys/sendfile.h>], 4438 [sendfile(1, 2, (off_t*)0, sizeof 1);], 4439 [glibcxx_cv_sendfile=yes], 4440 [glibcxx_cv_sendfile=no]) 4441 ;; 4442 *) 4443 glibcxx_cv_sendfile=no 4444 ;; 4445 esac 4446 ]) 4447 if test $glibcxx_cv_sendfile = yes; then 4448 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.]) 4449 fi 4450 AC_MSG_RESULT($glibcxx_cv_sendfile) 4451dnl 4452 CXXFLAGS="$ac_save_CXXFLAGS" 4453 AC_LANG_RESTORE 4454]) 4455 4456dnl 4457dnl Check how size_t is mangled. Copied from libitm. 4458dnl 4459AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [ 4460 AC_CACHE_CHECK([how size_t is mangled], 4461 glibcxx_cv_size_t_mangling, [ 4462 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;], 4463 [glibcxx_cv_size_t_mangling=m], [ 4464 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;], 4465 [glibcxx_cv_size_t_mangling=j], [ 4466 AC_TRY_COMPILE([], 4467 [extern __SIZE_TYPE__ x; extern unsigned long long x;], 4468 [glibcxx_cv_size_t_mangling=y], [ 4469 AC_TRY_COMPILE([], 4470 [extern __SIZE_TYPE__ x; extern unsigned short x;], 4471 [glibcxx_cv_size_t_mangling=t], [ 4472 AC_TRY_COMPILE([], 4473 [extern __SIZE_TYPE__ x; extern __int20 unsigned x;], 4474 [glibcxx_cv_size_t_mangling=u6uint20], 4475 [glibcxx_cv_size_t_mangling=x]) 4476 ]) 4477 ]) 4478 ]) 4479 ]) 4480 ]) 4481 if test $glibcxx_cv_size_t_mangling = x; then 4482 AC_MSG_ERROR([Unknown underlying type for size_t]) 4483 fi 4484 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling], 4485 [Define to the letter to which size_t is mangled.]) 4486]) 4487 4488# Macros from the top-level gcc directory. 4489m4_include([../config/gc++filt.m4]) 4490m4_include([../config/tls.m4]) 4491m4_include([../config/gthr.m4]) 4492