2 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
4 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
5 dnl end of configure. This lets tested variables be reassigned, and the
6 dnl conditional will depend on the final state of the variable. For a simple
7 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
9 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
10 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
11 m4_divert_text([glibcxx_diversion],dnl
12 AM_CONDITIONAL([$1],[$2])
15 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
19 dnl Check to see what architecture and operating system we are compiling
20 dnl for. Also, if architecture- or OS-specific flags are required for
21 dnl compilation, pick them up here.
23 AC_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])
30 dnl Initialize the rest of the library configury. At this point we have
31 dnl variables like $host.
36 dnl glibcxx_builddir (absolute path)
37 dnl glibcxx_srcdir (absolute path)
38 dnl toplevel_builddir (absolute path)
39 dnl toplevel_srcdir (absolute path)
42 dnl with_target_subdir
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/c++17 src/c++20 src/filesystem src/libbacktrace doc po testsuite python])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
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)
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]))
76 AC_ARG_WITH([cross-host],
77 AC_HELP_STRING([--with-cross-host=HOST],
78 [configuring with a cross compiler]))
81 AC_HELP_STRING([--with-newlib],
82 [assume newlib as a system C library]))
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.
91 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
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
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], [
107 ], uclibc=yes, uclibc=no)
109 AC_EGREP_CPP([_using_bionic], [
114 ], bionic=yes, bionic=no)
116 # Find platform-specific directories containing configuration info.
117 # Also possibly modify flags used elsewhere, as needed by the platform.
123 dnl Tests for newer compiler features, or features that are present in newer
124 dnl compiler versions but not older compiler versions still in use, should
128 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
129 dnl new inlining code or the new system_header pragma will die on -Werror.
130 dnl Leave it out by default and use maint-mode to use it.
131 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
132 dnl compiler supports it and the user has not requested debug mode.
134 AC_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.
140 ac_test_CXXFLAGS="${CXXFLAGS+set}"
141 ac_save_CXXFLAGS="$CXXFLAGS"
143 # Check for -ffunction-sections -fdata-sections
144 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
145 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
146 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
147 if test "$ac_test_CXXFLAGS" = set; then
148 CXXFLAGS="$ac_save_CXXFLAGS"
150 # this is the suspicious part
153 if test x"$ac_fdsections" = x"yes"; then
154 SECTION_FLAGS='-ffunction-sections -fdata-sections'
156 AC_MSG_RESULT($ac_fdsections)
159 AC_SUBST(SECTION_FLAGS)
164 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
165 dnl the native linker is in use, all variables will be defined to something
166 dnl safe (like an empty string).
169 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
170 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
171 dnl LD (as a side effect of testing)
174 dnl glibcxx_ld_is_gold (set to "no" or "yes")
175 dnl glibcxx_ld_is_mold (set to "no" or "yes")
176 dnl glibcxx_gnu_ld_version (possibly)
178 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
179 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
181 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
182 # If we're not using GNU ld, then there's no point in even trying these
183 # tests. Check for that first. We should have already tested for gld
184 # by now (in libtool), but require it now just to be safe...
185 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
186 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
187 AC_REQUIRE([AC_PROG_LD])
188 AC_REQUIRE([AC_PROG_AWK])
190 # The name set by libtool depends on the version of libtool. Shame on us
191 # for depending on an impl detail, but c'est la vie. Older versions used
192 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
193 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
194 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
195 # set (hence we're using an older libtool), then set it.
196 if test x${with_gnu_ld+set} != xset; then
197 if test x${ac_cv_prog_gnu_ld+set} != xset; then
198 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
201 with_gnu_ld=$ac_cv_prog_gnu_ld
205 # Start by getting the version number. I think the libtool test already
206 # does some of this, but throws away the result.
207 glibcxx_ld_is_gold=no
208 glibcxx_ld_is_mold=no
209 if test x"$with_gnu_ld" = x"yes"; then
210 AC_MSG_CHECKING([for ld version])
212 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
213 glibcxx_ld_is_gold=yes
214 elif $LD --version 2>/dev/null | grep 'mold' >/dev/null 2>&1; then
215 glibcxx_ld_is_mold=yes
217 ldver=`$LD --version 2>/dev/null |
218 sed -e 's/[. ][0-9]\{8\}$//;s/.* \([^ ]\{1,\}\)$/\1/; q'`
220 glibcxx_gnu_ld_version=`echo $ldver | \
221 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
222 AC_MSG_RESULT($glibcxx_gnu_ld_version)
226 glibcxx_have_gc_sections=no
227 if test "$glibcxx_ld_is_gold" = "yes" || test "$glibcxx_ld_is_mold" = "yes" ; then
228 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
229 glibcxx_have_gc_sections=yes
232 glibcxx_gcsections_min_ld=21602
233 if test x"$with_gnu_ld" = x"yes" &&
234 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
235 glibcxx_have_gc_sections=yes
238 if test "$glibcxx_have_gc_sections" = "yes"; then
239 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
240 # NB: This flag only works reliably after 2.16.1. Configure tests
241 # for this are difficult, so hard wire a value that should work.
243 ac_test_CFLAGS="${CFLAGS+set}"
244 ac_save_CFLAGS="$CFLAGS"
245 CFLAGS='-Wl,--gc-sections'
247 # Check for -Wl,--gc-sections
248 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
249 AC_TRY_LINK([ int one(void) { return 1; }
250 int two(void) { return 2; }
251 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
252 if test "$ac_gcsections" = "yes"; then
255 if $CC -c conftest.c; then
256 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
257 grep "Warning: gc-sections option ignored" > /dev/null; then
261 rm -f conftest.c conftest.o conftest
263 if test "$ac_gcsections" = "yes"; then
264 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
266 AC_MSG_RESULT($ac_gcsections)
268 if test "$ac_test_CFLAGS" = set; then
269 CFLAGS="$ac_save_CFLAGS"
271 # this is the suspicious part
277 # Note this is only for shared objects.
279 if test x"$with_gnu_ld" = x"yes"; then
280 # cygwin and mingw uses PE, which has no ELF relro support,
281 # multi target ld may confuse configure machinery
288 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
289 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
290 if test -n "$cxx_z_relo"; then
291 OPT_LDFLAGS="-Wl,-z,relro"
294 AC_MSG_RESULT($ac_ld_relro)
298 # Set linker optimization flags.
299 if test x"$with_gnu_ld" = x"yes"; then
300 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
303 AC_SUBST(SECTION_LDFLAGS)
304 AC_SUBST(OPT_LDFLAGS)
309 dnl Check for headers for, and arguments to, the setrlimit() function.
310 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
313 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
314 dnl various HAVE_LIMIT_* for individual limit names
316 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
317 AC_MSG_CHECKING([for RLIMIT_$1])
320 #include <sys/time.h>
321 #include <sys/resource.h>
323 [ int f = RLIMIT_$1 ; ],
324 [glibcxx_mresult=1], [glibcxx_mresult=0])
325 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
326 [Only used in build directory testsuite_hooks.h.])
327 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
331 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
334 setrlimit_have_headers=yes
335 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
337 [setrlimit_have_headers=no])
338 # If don't have the headers, then we can't run the tests now, and we
339 # won't be seeing any of these during testsuite compilation.
340 if test $setrlimit_have_headers = yes; then
341 # Can't do these in a loop, else the resulting syntax is wrong.
342 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
343 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
344 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
345 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
346 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
348 # Check for rlimit, setrlimit.
349 AC_CACHE_CHECK([for testsuite resource limits support],
350 glibcxx_cv_setrlimit, [
353 #include <sys/time.h>
354 #include <sys/resource.h>
358 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
361 if test $glibcxx_cv_setrlimit = yes; then
362 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
363 [Define if using setrlimit to set resource limits during
372 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
373 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
375 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
379 ac_save_CXXFLAGS="$CXXFLAGS"
380 CXXFLAGS="$CXXFLAGS -fno-exceptions"
382 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
383 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
384 GCC_TRY_COMPILE_OR_LINK(
385 [#include <sys/stat.h>],
388 S_ISREG(buffer.st_mode);],
389 [glibcxx_cv_S_ISREG=yes],
390 [glibcxx_cv_S_ISREG=no])
392 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
393 GCC_TRY_COMPILE_OR_LINK(
394 [#include <sys/stat.h>],
397 S_IFREG & buffer.st_mode;],
398 [glibcxx_cv_S_IFREG=yes],
399 [glibcxx_cv_S_IFREG=no])
402 if test $glibcxx_cv_S_ISREG = yes; then
403 AC_DEFINE(HAVE_S_ISREG, 1,
404 [Define if S_ISREG is available in <sys/stat.h>.])
406 elif test $glibcxx_cv_S_IFREG = yes; then
407 AC_DEFINE(HAVE_S_IFREG, 1,
408 [Define if S_IFREG is available in <sys/stat.h>.])
413 CXXFLAGS="$ac_save_CXXFLAGS"
419 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
421 AC_DEFUN([GLIBCXX_CHECK_POLL], [
425 ac_save_CXXFLAGS="$CXXFLAGS"
426 CXXFLAGS="$CXXFLAGS -fno-exceptions"
428 AC_CACHE_CHECK([for poll], glibcxx_cv_POLL, [
429 GCC_TRY_COMPILE_OR_LINK(
431 [struct pollfd pfd[1];
432 pfd[0].events = POLLIN;
434 [glibcxx_cv_POLL=yes],
435 [glibcxx_cv_POLL=no])
437 if test $glibcxx_cv_POLL = yes; then
438 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
441 CXXFLAGS="$ac_save_CXXFLAGS"
447 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
449 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
453 ac_save_CXXFLAGS="$CXXFLAGS"
454 CXXFLAGS="$CXXFLAGS -fno-exceptions"
456 AC_CACHE_CHECK([for writev], glibcxx_cv_WRITEV, [
457 GCC_TRY_COMPILE_OR_LINK(
458 [#include <sys/uio.h>],
459 [struct iovec iov[2];
461 [glibcxx_cv_WRITEV=yes],
462 [glibcxx_cv_WRITEV=no])
464 if test $glibcxx_cv_WRITEV = yes; then
465 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
468 CXXFLAGS="$ac_save_CXXFLAGS"
474 dnl Check whether LFS support is available.
476 AC_DEFUN([GLIBCXX_CHECK_LFS], [
479 ac_save_CXXFLAGS="$CXXFLAGS"
480 CXXFLAGS="$CXXFLAGS -fno-exceptions"
481 AC_CACHE_CHECK([for LFS support], glibcxx_cv_LFS, [
482 GCC_TRY_COMPILE_OR_LINK(
485 #include <sys/stat.h>
489 fseeko64(fp, 0, SEEK_CUR);
491 lseek64(1, 0, SEEK_CUR);
494 [glibcxx_cv_LFS=yes],
497 if test $glibcxx_cv_LFS = yes; then
498 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
500 CXXFLAGS="$ac_save_CXXFLAGS"
506 dnl Check whether the old Copy-On-Write basic_string should allocate a new
507 dnl empty representation for every default-constructed basic_string. Without
508 dnl this option, COW strings share a single empty rep in static storage,
509 dnl but this only works if the linker can guarantee the static storage has
510 dnl a unique definition in the process. It also doesn't work if basic_string
511 dnl objects are stored in shared memory (see PR libstdc++/16612).
512 dnl When fully dynamic strings are enabled, the static storage is not used
513 dnl and a new empty string with reference-count == 1 is allocated each time.
514 dnl Enabling this changes the libstdc++.so ABI.
516 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
517 dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
518 dnl otherwise the macro is not defined.
519 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
520 dnl Where DEFAULT is either `yes' or `no'.
522 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
523 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory], [permit yes|no])
524 if test $enable_fully_dynamic_string = yes; then
525 enable_fully_dynamic_string_def=1
527 enable_fully_dynamic_string_def=0
529 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
530 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
535 dnl Does any necessary configuration of the testsuite directory. Generates
536 dnl the testsuite_hooks.h header.
538 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
542 dnl GLIBCXX_TEST_WCHAR_T
543 dnl GLIBCXX_TEST_THREAD
546 dnl baseline_subdir_switch
548 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
549 # Do checks for resource limit functions.
550 GLIBCXX_CHECK_SETRLIMIT
552 if $GLIBCXX_IS_NATIVE ; then
553 # Look for setenv, so that extended locale tests can be performed.
554 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
557 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
558 test $enable_symvers != no; then
561 enable_abi_check=no ;;
563 enable_abi_check=yes ;;
566 # Only build this as native, since automake does not understand
571 # Export file names for ABI checking.
572 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
573 AC_SUBST(baseline_dir)
574 baseline_subdir_switch="$abi_baseline_subdir_switch"
575 AC_SUBST(baseline_subdir_switch)
580 dnl Does any necessary configuration for docbook in the docs directory.
582 dnl XSLTPROC must be set before this
585 dnl glibcxx_stylesheets
589 AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
591 glibcxx_docbook_url=http://docbook.sourceforge.net/release/xsl-ns/current/
593 AC_MSG_CHECKING([for local stylesheet directory])
594 glibcxx_local_stylesheets=no
595 if test x${XMLCATALOG} = xyes && xsl_style_dir=`xmlcatalog "" $glibcxx_docbook_url 2>/dev/null`
597 XSL_STYLE_DIR=`echo $xsl_style_dir | sed -n 's;^file://;;p'`
598 glibcxx_local_stylesheets=yes
601 /usr/share/sgml/docbook/xsl-ns-stylesheets \
602 /usr/share/xml/docbook/stylesheet/docbook-xsl-ns \
603 /usr/share/xml/docbook/stylesheet/nwalsh5/current \
604 /usr/share/xml/docbook/stylesheet/nwalsh/current
606 if test -d $dir; then
607 glibcxx_local_stylesheets=yes
613 AC_MSG_RESULT($glibcxx_local_stylesheets)
615 if test x"$glibcxx_local_stylesheets" = x"yes"; then
616 AC_SUBST(XSL_STYLE_DIR)
617 AC_MSG_NOTICE($XSL_STYLE_DIR)
619 AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
620 glibcxx_stylesheets=no
621 if test x${XMLCATALOG} = xno || xmlcatalog "" $glibcxx_docbook_url/xhtml/docbook.xsl >/dev/null 2>&1; then
622 if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude $glibcxx_docbook_url/xhtml/docbook.xsl - 2>/dev/null; then
623 glibcxx_stylesheets=yes
626 AC_MSG_RESULT($glibcxx_stylesheets)
629 glibcxx_stylesheets=no
632 # Check for epub3 dependencies.
633 AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
634 glibcxx_epub_stylesheets=no
635 if test x"$glibcxx_local_stylesheets" = x"yes"; then
636 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
637 glibcxx_epub_stylesheets=yes
640 AC_MSG_RESULT($glibcxx_epub_stylesheets)
641 AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
647 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
651 dnl TOPLEVEL_INCLUDES
653 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
654 # Used for every C++ compile we perform.
656 -I$glibcxx_builddir/include/$host_alias \
657 -I$glibcxx_builddir/include \
658 -I$glibcxx_srcdir/libsupc++"
660 # For Canadian crosses, pick this up too.
661 if test $CANADIAN = yes; then
662 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
665 # Stuff in the actual top level. Currently only used by libsupc++ to
666 # get unwind* headers from the libgcc dir.
667 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
668 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
670 # Now, export this to all the little Makefiles....
671 AC_SUBST(GLIBCXX_INCLUDES)
672 AC_SUBST(TOPLEVEL_INCLUDES)
677 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
678 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
681 dnl OPTIMIZE_CXXFLAGS
684 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
685 # Optimization flags that are probably a good idea for thrill-seekers. Just
686 # uncomment the lines below and make, everything else is ready to go...
687 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
688 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
689 AC_SUBST(OPTIMIZE_CXXFLAGS)
691 WARN_FLAGS="-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2"
697 dnl All installation directory information is determined here.
701 dnl glibcxx_prefixdir
702 dnl glibcxx_toolexecdir
703 dnl glibcxx_toolexeclibdir
705 dnl Assumes cross_compiling bits already done, and with_cross_host in
708 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
709 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
710 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
711 glibcxx_toolexecdir=no
712 glibcxx_toolexeclibdir=no
713 glibcxx_prefixdir=$prefix
715 AC_MSG_CHECKING([for gxx-include-dir])
716 AC_ARG_WITH([gxx-include-dir],
717 AC_HELP_STRING([--with-gxx-include-dir=DIR],
718 [installation directory for include files]),
720 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
721 no) gxx_include_dir=no ;;
722 *) gxx_include_dir=$withval ;;
724 [gxx_include_dir=no])
725 AC_MSG_RESULT($gxx_include_dir)
727 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
728 AC_ARG_ENABLE([version-specific-runtime-libs],
729 AC_HELP_STRING([--enable-version-specific-runtime-libs],
730 [Specify that runtime libraries should be installed in a compiler-specific directory]),
731 [case "$enableval" in
732 yes) version_specific_libs=yes ;;
733 no) version_specific_libs=no ;;
734 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
736 [version_specific_libs=no])
737 AC_MSG_RESULT($version_specific_libs)
739 GCC_WITH_TOOLEXECLIBDIR
741 # Default case for install directory for include files.
742 if test $version_specific_libs = no && test $gxx_include_dir = no; then
743 gxx_include_dir='include/c++/${gcc_version}'
744 if test -n "$with_cross_host" &&
745 test x"$with_cross_host" != x"no"; then
746 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
748 gxx_include_dir='${prefix}/'"$gxx_include_dir"
752 # Version-specific runtime libs processing.
753 if test $version_specific_libs = yes; then
754 # Need the gcc compiler version to know where to install libraries
755 # and header files if --enable-version-specific-runtime-libs option
756 # is selected. FIXME: these variables are misnamed, there are
757 # no executables installed in _toolexecdir or _toolexeclibdir.
758 if test x"$gxx_include_dir" = x"no"; then
759 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
761 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
762 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
765 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
766 # Install a library built with a cross compiler in tooldir, not libdir.
767 if test x"$glibcxx_toolexecdir" = x"no"; then
768 if test -n "$with_cross_host" &&
769 test x"$with_cross_host" != x"no"; then
770 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
771 case ${with_toolexeclibdir} in
773 glibcxx_toolexeclibdir='${toolexecdir}/lib'
776 glibcxx_toolexeclibdir=${with_toolexeclibdir}
780 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
781 glibcxx_toolexeclibdir='${libdir}'
783 multi_os_directory=`$CXX -print-multi-os-directory`
784 case $multi_os_directory in
785 .) ;; # Avoid trailing /.
786 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
790 AC_MSG_CHECKING([for install location])
791 AC_MSG_RESULT($gxx_include_dir)
793 AC_SUBST(glibcxx_prefixdir)
794 AC_SUBST(gxx_include_dir)
795 AC_SUBST(glibcxx_toolexecdir)
796 AC_SUBST(glibcxx_toolexeclibdir)
802 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
803 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
804 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
806 dnl See manual/appendix_porting.html#appendix.porting.build_hacking for
809 m4_define([GLIBCXX_ENABLE],[dnl
810 m4_define([_g_switch],[--enable-$1])dnl
811 m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
812 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
817 m4_bpatsubst([$5],[permit ])) ;;
818 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
819 dnl Idea for future: generate a URL pointing to
820 dnl "onlinedocs/configopts.html#whatever"
827 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
831 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
832 m4_undefine([_g_switch])dnl
833 m4_undefine([_g_help])dnl
838 dnl Check for ISO/IEC 9899:1999 "C99" support.
840 dnl --enable-c99 defines _GLIBCXX_USE_C99
841 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
842 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
843 dnl Where DEFAULT is either `yes' or `no'.
844 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
846 AC_DEFUN([GLIBCXX_ENABLE_C99], [
847 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
849 if test x"$enable_c99" = x"yes"; then
853 # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__
854 # undefined may cause fake C99 facilities, like pre-standard snprintf,
855 # to be spuriously enabled.
856 ac_save_CXXFLAGS="$CXXFLAGS"
857 CXXFLAGS="$CXXFLAGS -std=c++98"
859 ac_save_gcc_no_link="$gcc_no_link"
861 if test x$gcc_no_link != xyes; then
862 # Use -fno-exceptions to that the C driver can link these tests without
863 # hitting undefined references to personality routines.
864 CXXFLAGS="$CXXFLAGS -fno-exceptions"
865 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
866 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
871 # Check for the existence of <math.h> functions used if C99 is enabled.
872 AC_CACHE_CHECK([for ISO C99 support in <math.h> for C++98],
873 glibcxx_cv_c99_math_cxx98, [
874 GCC_TRY_COMPILE_OR_LINK(
876 volatile double d1, d2;
884 i = isgreater(d1, d2);
885 i = isgreaterequal(d1, d2);
887 i = islessequal(d1, d2);
888 i = islessgreater(d1, d2);
889 i = islessgreater(d1, d2);
890 i = isunordered(d1, d2);
891 ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no])
893 if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then
894 AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1,
895 [Define if C99 functions or macros in <math.h> should be imported
896 in <cmath> in namespace std for C++98.])
899 # Check for the existence of <complex.h> complex math functions.
900 # This is necessary even though libstdc++ uses the builtin versions
901 # of these functions, because if the builtin cannot be used, a reference
902 # to the library function is emitted.
903 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
904 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
905 if test x"$ac_has_complex_h" = x"yes"; then
906 AC_CACHE_CHECK([for ISO C99 support in <complex.h> for C++98],
907 glibcxx_cv_c99_complex_cxx98, [
908 GCC_TRY_COMPILE_OR_LINK(
909 [#include <complex.h>
910 typedef __complex__ float float_type;
911 typedef __complex__ double double_type;
912 typedef __complex__ long double ld_type;
913 volatile float_type tmpf;
914 volatile double_type tmpd;
915 volatile ld_type tmpld;
918 volatile long double ld;],
930 tmpf = cpowf(tmpf, tmpf);
943 tmpd = cpow(tmpd, tmpd);
947 tmpld = ccosl(tmpld);
948 tmpld = ccoshl(tmpld);
949 tmpld = cexpl(tmpld);
950 tmpld = clogl(tmpld);
951 tmpld = csinl(tmpld);
952 tmpld = csinhl(tmpld);
953 tmpld = csqrtl(tmpld);
954 tmpld = ctanl(tmpld);
955 tmpld = ctanhl(tmpld);
956 tmpld = cpowl(tmpld, tmpld);
957 tmpld = cprojl(tmpld);
958 ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no])
961 if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then
962 AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1,
963 [Define if C99 functions in <complex.h> should be used in
964 <complex> for C++98. Using compiler builtins for these functions
965 requires corresponding C99 library functions to be present.])
968 # Check for the existence in <stdio.h> of vscanf, et. al.
969 AC_CACHE_CHECK([for ISO C99 support in <stdio.h> for C++98],
970 glibcxx_cv_c99_stdio_cxx98, [
971 GCC_TRY_COMPILE_OR_LINK(
974 void foo(char* fmt, ...)
976 va_list args; va_start(args, fmt);
977 vfscanf(stderr, "%i", args);
979 vsnprintf(fmt, 0, "%i", args);
980 vsscanf(fmt, "%i", args);
981 snprintf(fmt, 0, "%i");
983 [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no])
985 if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then
986 AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1,
987 [Define if C99 functions or macros in <stdio.h> should be imported
988 in <cstdio> in namespace std for C++98.])
991 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
992 AC_CACHE_CHECK([for ISO C99 support in <stdlib.h> for C++98],
993 glibcxx_cv_c99_stdlib_cxx98, [
994 GCC_TRY_COMPILE_OR_LINK(
997 volatile long double ld;
998 volatile unsigned long long ll;
1001 f = strtof("gnu", &tmp);
1002 ld = strtold("gnu", &tmp);
1003 ll = strtoll("gnu", &tmp, 10);
1004 ll = strtoull("gnu", &tmp, 10);
1006 mydivt = lldiv(10,1);
1011 ], [glibcxx_cv_c99_stdlib_cxx98=yes], [glibcxx_cv_c99_stdlib_cxx98=no])
1013 if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then
1014 AC_DEFINE(_GLIBCXX98_USE_C99_STDLIB, 1,
1015 [Define if C99 functions or macros in <stdlib.h> should be imported
1016 in <cstdlib> in namespace std for C++98.])
1019 # Check for the existence in <wchar.h> of wcstold, etc.
1020 if test x"$ac_has_wchar_h" = xyes &&
1021 test x"$ac_has_wctype_h" = xyes; then
1022 AC_CACHE_CHECK([for ISO C99 support in <wchar.h> for C++98],
1023 glibcxx_cv_c99_wchar_cxx98, [
1024 AC_TRY_COMPILE([#include <wchar.h>
1031 ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no])
1034 # Checks for wide character functions that may not be present.
1035 # Injection of these is wrapped with guard macros.
1036 # NB: only put functions here, instead of immediately above, if
1037 # absolutely necessary.
1038 AC_TRY_COMPILE([#include <wchar.h>
1039 namespace test { using ::vfwscanf; }], [],
1040 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1042 AC_TRY_COMPILE([#include <wchar.h>
1043 namespace test { using ::vswscanf; }], [],
1044 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1046 AC_TRY_COMPILE([#include <wchar.h>
1047 namespace test { using ::vwscanf; }], [],
1048 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1050 AC_TRY_COMPILE([#include <wchar.h>
1051 namespace test { using ::wcstof; }], [],
1052 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1054 AC_TRY_COMPILE([#include <wctype.h>],
1055 [wint_t t; int i = iswblank(t);],
1056 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1058 if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then
1059 AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1,
1060 [Define if C99 functions or macros in <wchar.h> should be imported
1061 in <cwchar> in namespace std for C++98.])
1065 # Option parsed, now set things appropriately.
1066 if test x"$glibcxx_cv_c99_math_cxx98" = x"no" ||
1067 test x"$glibcxx_cv_c99_complex_cxx98" = x"no" ||
1068 test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" ||
1069 test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" ||
1070 test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then
1073 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1074 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1075 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1078 gcc_no_link="$ac_save_gcc_no_link"
1079 LIBS="$ac_save_LIBS"
1080 CXXFLAGS="$ac_save_CXXFLAGS"
1086 # Use -std=c++11 and test again for C99 library feature in C++11 mode.
1087 # For the reasons given above we use -std=c++11 not -std=gnu++11.
1088 ac_save_CXXFLAGS="$CXXFLAGS"
1089 CXXFLAGS="$CXXFLAGS -std=c++11"
1090 ac_save_LIBS="$LIBS"
1091 ac_save_gcc_no_link="$gcc_no_link"
1093 if test x$gcc_no_link != xyes; then
1094 # Use -fno-exceptions to that the C driver can link these tests without
1095 # hitting undefined references to personality routines.
1096 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1097 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
1098 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
1103 # Check for the existence of <math.h> functions used if C99 is enabled.
1104 AC_CACHE_CHECK([for ISO C99 support in <math.h> for C++11],
1105 glibcxx_cv_c99_math_cxx11, [
1106 GCC_TRY_COMPILE_OR_LINK(
1108 volatile double d1, d2;
1110 [i = fpclassify(d1);
1116 i = isgreater(d1, d2);
1117 i = isgreaterequal(d1, d2);
1119 i = islessequal(d1, d2);
1120 i = islessgreater(d1, d2);
1121 i = islessgreater(d1, d2);
1122 i = isunordered(d1, d2);
1123 ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no])
1125 if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then
1126 AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1,
1127 [Define if C99 functions or macros in <math.h> should be imported
1128 in <cmath> in namespace std for C++11.])
1131 # Check for the existence of <complex.h> complex math functions.
1132 # This is necessary even though libstdc++ uses the builtin versions
1133 # of these functions, because if the builtin cannot be used, a reference
1134 # to the library function is emitted.
1135 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
1136 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1137 if test x"$ac_has_complex_h" = x"yes"; then
1138 AC_CACHE_CHECK([for ISO C99 support in <complex.h> for C++11],
1139 glibcxx_cv_c99_complex_cxx11, [
1140 GCC_TRY_COMPILE_OR_LINK(
1141 [#include <complex.h>
1142 typedef __complex__ float float_type;
1143 typedef __complex__ double double_type;
1144 typedef __complex__ long double ld_type;
1145 volatile float_type tmpf;
1146 volatile double_type tmpd;
1147 volatile ld_type tmpld;
1150 volatile long double ld;],
1154 tmpf = ccoshf(tmpf);
1158 tmpf = csinhf(tmpf);
1159 tmpf = csqrtf(tmpf);
1161 tmpf = ctanhf(tmpf);
1162 tmpf = cpowf(tmpf, tmpf);
1163 tmpf = cprojf(tmpf);
1175 tmpd = cpow(tmpd, tmpd);
1179 tmpld = ccosl(tmpld);
1180 tmpld = ccoshl(tmpld);
1181 tmpld = cexpl(tmpld);
1182 tmpld = clogl(tmpld);
1183 tmpld = csinl(tmpld);
1184 tmpld = csinhl(tmpld);
1185 tmpld = csqrtl(tmpld);
1186 tmpld = ctanl(tmpld);
1187 tmpld = ctanhl(tmpld);
1188 tmpld = cpowl(tmpld, tmpld);
1189 tmpld = cprojl(tmpld);
1190 ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no])
1193 if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then
1194 AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1,
1195 [Define if C99 functions in <complex.h> should be used in
1196 <complex> for C++11. Using compiler builtins for these functions
1197 requires corresponding C99 library functions to be present.])
1200 # Check for the existence in <stdio.h> of vscanf, et. al.
1201 AC_CACHE_CHECK([for ISO C99 support in <stdio.h> for C++11],
1202 glibcxx_cv_c99_stdio_cxx11, [
1203 GCC_TRY_COMPILE_OR_LINK(
1206 void foo(char* fmt, ...)
1208 va_list args; va_start(args, fmt);
1209 vfscanf(stderr, "%i", args);
1211 vsnprintf(fmt, 0, "%i", args);
1212 vsscanf(fmt, "%i", args);
1213 snprintf(fmt, 0, "%i");
1215 [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no])
1217 if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then
1218 AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1,
1219 [Define if C99 functions or macros in <stdio.h> should be imported
1220 in <cstdio> in namespace std for C++11.])
1223 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1224 AC_CACHE_CHECK([for ISO C99 support in <stdlib.h> for C++11],
1225 glibcxx_cv_c99_stdlib_cxx11, [
1226 GCC_TRY_COMPILE_OR_LINK(
1227 [#include <stdlib.h>
1229 volatile long double ld;
1230 volatile unsigned long long ll;
1233 f = strtof("gnu", &tmp);
1234 ld = strtold("gnu", &tmp);
1235 ll = strtoll("gnu", &tmp, 10);
1236 ll = strtoull("gnu", &tmp, 10);
1238 mydivt = lldiv(10,1);
1243 ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no])
1245 if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then
1246 AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1,
1247 [Define if C99 functions or macros in <stdlib.h> should be imported
1248 in <cstdlib> in namespace std for C++11.])
1251 # Check for the existence in <wchar.h> of wcstold, etc.
1252 if test x"$ac_has_wchar_h" = xyes &&
1253 test x"$ac_has_wctype_h" = xyes; then
1254 AC_CACHE_CHECK([for ISO C99 support in <wchar.h> for C++11],
1255 glibcxx_cv_c99_wchar_cxx11, [
1256 AC_TRY_COMPILE([#include <wchar.h>
1263 ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no])
1266 # Checks for wide character functions that may not be present.
1267 # Injection of these is wrapped with guard macros.
1268 # NB: only put functions here, instead of immediately above, if
1269 # absolutely necessary.
1270 AC_TRY_COMPILE([#include <wchar.h>
1271 namespace test { using ::vfwscanf; }], [],
1272 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1274 AC_TRY_COMPILE([#include <wchar.h>
1275 namespace test { using ::vswscanf; }], [],
1276 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1278 AC_TRY_COMPILE([#include <wchar.h>
1279 namespace test { using ::vwscanf; }], [],
1280 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1282 AC_TRY_COMPILE([#include <wchar.h>
1283 namespace test { using ::wcstof; }], [],
1284 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1286 AC_TRY_COMPILE([#include <wctype.h>],
1287 [wint_t t; int i = iswblank(t);],
1288 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1290 if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then
1291 AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1,
1292 [Define if C99 functions or macros in <wchar.h> should be imported
1293 in <cwchar> in namespace std for C++11.])
1297 gcc_no_link="$ac_save_gcc_no_link"
1298 LIBS="$ac_save_LIBS"
1299 CXXFLAGS="$ac_save_CXXFLAGS"
1303 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1304 AC_MSG_RESULT($enable_c99)
1309 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1310 dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1311 dnl in the C++11 standard.
1313 dnl --enable-libstdcxx-time
1314 dnl --enable-libstdcxx-time=yes
1315 dnl checks for the availability of monotonic and realtime clocks,
1316 dnl nanosleep and sched_yield in libc.
1317 dnl --enable-libstdcxx-time=rt
1318 dnl also searches (and, if needed, links) librt. Note that this is
1319 dnl not always desirable because, in glibc 2.16 and earlier, for
1320 dnl example, in turn it triggers the linking of libpthread too,
1321 dnl which activates locking,
1322 dnl a large overhead for single-thread programs.
1323 dnl --enable-libstdcxx-time=no
1324 dnl --disable-libstdcxx-time
1325 dnl disables the checks completely
1327 dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1328 dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1329 dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1330 dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1332 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1334 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
1335 [use KIND for check type],
1340 ac_save_CXXFLAGS="$CXXFLAGS"
1341 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1342 ac_save_LIBS="$LIBS"
1344 ac_has_clock_monotonic=no
1345 ac_has_clock_realtime=no
1347 ac_has_sched_yield=no
1349 if test x"$enable_libstdcxx_time" = x"auto"; then
1351 case "${target_os}" in
1353 ac_has_nanosleep=yes
1356 ac_has_nanosleep=yes
1357 ac_has_sched_yield=yes
1359 # VxWorks has nanosleep as soon as the kernel is configured with
1360 # INCLUDE_POSIX_TIMERS, which is normally/most-often the case.
1362 ac_has_nanosleep=yes
1364 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
1365 # Don't use link test for freestanding library, in case gcc_no_link=yes
1366 if test x"$is_hosted" = xyes; then
1367 # Versions of glibc before 2.17 needed -lrt for clock_gettime.
1368 AC_SEARCH_LIBS(clock_gettime, [rt])
1369 if test x"$ac_cv_search_clock_gettime" = x"none required"; then
1370 ac_has_clock_monotonic=yes
1371 ac_has_clock_realtime=yes
1374 ac_has_nanosleep=yes
1375 ac_has_sched_yield=yes
1377 freebsd*|netbsd*|dragonfly*|rtems*)
1378 ac_has_clock_monotonic=yes
1379 ac_has_clock_realtime=yes
1380 ac_has_nanosleep=yes
1381 ac_has_sched_yield=yes
1384 ac_has_clock_monotonic=yes
1385 ac_has_clock_realtime=yes
1386 ac_has_nanosleep=yes
1389 ac_has_clock_monotonic=yes
1390 ac_has_clock_realtime=yes
1391 ac_has_nanosleep=yes
1392 ac_has_sched_yield=yes
1395 ac_has_nanosleep=yes
1396 ac_has_sched_yield=yes
1399 elif test x"$enable_libstdcxx_time" != x"no"; then
1401 if test x"$enable_libstdcxx_time" = x"rt"; then
1402 AC_SEARCH_LIBS(clock_gettime, [rt])
1403 AC_SEARCH_LIBS(nanosleep, [rt])
1405 AC_CHECK_FUNC(clock_gettime)
1406 AC_CHECK_FUNC(nanosleep)
1409 case "$ac_cv_search_clock_gettime" in
1410 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1413 case "$ac_cv_search_nanosleep" in
1414 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1418 AC_SEARCH_LIBS(sched_yield, [rt])
1420 case "$ac_cv_search_sched_yield" in
1422 if test x"$enable_libstdcxx_time" = x"rt"; then
1423 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1424 ac_has_sched_yield=yes
1428 ac_has_sched_yield=yes
1432 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1434 if test x"$ac_has_unistd_h" = x"yes"; then
1435 AC_MSG_CHECKING([for monotonic clock])
1437 [#include <unistd.h>
1440 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1443 clock_gettime(CLOCK_MONOTONIC, &tp);
1444 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1446 AC_MSG_RESULT($ac_has_clock_monotonic)
1448 AC_MSG_CHECKING([for realtime clock])
1450 [#include <unistd.h>
1453 [#if _POSIX_TIMERS > 0
1456 clock_gettime(CLOCK_REALTIME, &tp);
1457 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1459 AC_MSG_RESULT($ac_has_clock_realtime)
1461 AC_MSG_CHECKING([for nanosleep])
1463 [#include <unistd.h>
1466 [#if _POSIX_TIMERS > 0
1470 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1472 AC_MSG_RESULT($ac_has_nanosleep)
1476 if test x"$ac_has_clock_monotonic" != x"yes"; then
1477 case ${target_os} in
1479 AC_MSG_CHECKING([for clock_gettime syscall])
1481 [#include <unistd.h>
1483 #include <sys/syscall.h>
1485 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1488 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
1489 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
1490 ], [ac_has_clock_gettime_syscall=yes], [ac_has_clock_gettime_syscall=no])
1491 AC_MSG_RESULT($ac_has_clock_gettime_syscall)
1492 if test x"$ac_has_clock_gettime_syscall" = x"yes"; then
1493 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
1494 [Defined if clock_gettime syscall has monotonic and realtime clock support. ])
1495 ac_has_clock_monotonic=yes
1496 ac_has_clock_realtime=yes
1497 AC_MSG_CHECKING([for struct timespec that matches syscall])
1500 #include <sys/syscall.h>
1502 [#ifdef SYS_clock_gettime64
1503 #if SYS_clock_gettime64 != SYS_clock_gettime
1504 // We need to use SYS_clock_gettime and libc appears to
1505 // also know about the SYS_clock_gettime64 syscall.
1506 // Check that userspace doesn't use time64 version of timespec.
1507 static_assert(sizeof(timespec::tv_sec) == sizeof(long),
1508 "struct timespec must be compatible with SYS_clock_gettime");
1512 [ac_timespec_matches_syscall=yes],
1513 [ac_timespec_matches_syscall=no])
1514 AC_MSG_RESULT($ac_timespec_matches_syscall)
1515 if test x"$ac_timespec_matches_syscall" = no; then
1516 AC_MSG_ERROR([struct timespec is not compatible with SYS_clock_gettime, please report a bug to http://gcc.gnu.org/bugzilla])
1522 if test x"$ac_has_clock_monotonic" = x"yes"; then
1523 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1524 [ Defined if clock_gettime has monotonic clock support. ])
1527 if test x"$ac_has_clock_realtime" = x"yes"; then
1528 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1529 [ Defined if clock_gettime has realtime clock support. ])
1532 if test x"$ac_has_sched_yield" = x"yes"; then
1533 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1534 [ Defined if sched_yield is available. ])
1537 if test x"$ac_has_nanosleep" = x"yes"; then
1538 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1539 [ Defined if nanosleep is available. ])
1541 AC_MSG_CHECKING([for sleep])
1542 AC_TRY_COMPILE([#include <unistd.h>],
1544 [ac_has_sleep=yes],[ac_has_sleep=no])
1545 if test x"$ac_has_sleep" = x"yes"; then
1546 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1548 AC_MSG_RESULT($ac_has_sleep)
1549 AC_MSG_CHECKING([for usleep])
1550 AC_TRY_COMPILE([#include <unistd.h>],
1553 [ac_has_usleep=yes],[ac_has_usleep=no])
1554 if test x"$ac_has_usleep" = x"yes"; then
1555 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1557 AC_MSG_RESULT($ac_has_usleep)
1560 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1562 AC_MSG_CHECKING([for Sleep])
1563 AC_TRY_COMPILE([#include <windows.h>],
1565 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1566 if test x"$ac_has_win32_sleep" = x"yes"; then
1567 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1570 AC_MSG_RESULT($ac_has_win32_sleep)
1573 if test x"$ac_no_sleep" = x"yes"; then
1574 AC_DEFINE(_GLIBCXX_NO_SLEEP,1, [Defined if no way to sleep is available.])
1577 AC_SUBST(GLIBCXX_LIBS)
1579 CXXFLAGS="$ac_save_CXXFLAGS"
1580 LIBS="$ac_save_LIBS"
1585 dnl Check for gettimeofday, used in the implementation of 20.11.7
1586 dnl [time.clock] in the C++11 standard.
1588 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1590 AC_MSG_CHECKING([for gettimeofday])
1594 ac_save_CXXFLAGS="$CXXFLAGS"
1595 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1597 ac_has_gettimeofday=no;
1598 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1599 if test x"$ac_has_sys_time_h" = x"yes"; then
1600 AC_MSG_CHECKING([for gettimeofday])
1601 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1602 [timeval tv; gettimeofday(&tv, 0);],
1603 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1605 AC_MSG_RESULT($ac_has_gettimeofday)
1608 if test x"$ac_has_gettimeofday" = x"yes"; then
1609 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1610 [ Defined if gettimeofday is available. ])
1613 CXXFLAGS="$ac_save_CXXFLAGS"
1618 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1619 dnl facilities in Chapter 8, "C compatibility".
1621 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1626 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1627 # undefined and fake C99 facilities may be spuriously enabled.
1628 ac_save_CXXFLAGS="$CXXFLAGS"
1629 CXXFLAGS="$CXXFLAGS -std=c++98"
1631 # Check for the existence of <complex.h> complex math functions used
1633 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1634 ac_c99_complex_tr1=no;
1635 if test x"$ac_has_complex_h" = x"yes"; then
1636 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1637 AC_TRY_COMPILE([#include <complex.h>],
1638 [typedef __complex__ float float_type; float_type tmpf;
1645 typedef __complex__ double double_type; double_type tmpd;
1652 typedef __complex__ long double ld_type; ld_type tmpld;
1659 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1661 AC_MSG_RESULT($ac_c99_complex_tr1)
1662 if test x"$ac_c99_complex_tr1" = x"yes"; then
1663 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1664 [Define if C99 functions in <complex.h> should be used in
1665 <tr1/complex>. Using compiler builtins for these functions
1666 requires corresponding C99 library functions to be present.])
1669 # Check for the existence of <ctype.h> functions.
1670 AC_CACHE_CHECK([for ISO C99 support to TR1 in <ctype.h>],
1671 glibcxx_cv_c99_ctype_tr1, [
1672 AC_TRY_COMPILE([#include <ctype.h>],
1676 ],[glibcxx_cv_c99_ctype_tr1=yes],
1677 [glibcxx_cv_c99_ctype_tr1=no])
1679 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1680 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1681 [Define if C99 functions in <ctype.h> should be imported in
1682 <tr1/cctype> in namespace std::tr1.])
1685 # Check for the existence of <fenv.h> functions.
1686 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1688 if test x"$ac_has_fenv_h" = x"yes"; then
1689 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1690 AC_TRY_COMPILE([#include <fenv.h>],
1695 ret = feclearexcept(except);
1696 ret = fegetexceptflag(pflag, except);
1697 ret = feraiseexcept(except);
1698 ret = fesetexceptflag(pflag, except);
1699 ret = fetestexcept(except);
1701 ret = fesetround(mode);
1702 ret = fegetenv(penv);
1703 ret = feholdexcept(penv);
1704 ret = fesetenv(penv);
1705 ret = feupdateenv(penv);
1706 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1707 AC_MSG_RESULT($ac_c99_fenv_tr1)
1709 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1710 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1711 [Define if C99 functions in <fenv.h> should be imported in
1712 <tr1/cfenv> in namespace std::tr1.])
1715 # Check for the existence of <stdint.h> types.
1716 AC_CACHE_CHECK([for ISO C99 support to TR1 in <stdint.h>],
1717 glibcxx_cv_c99_stdint_tr1, [
1718 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1719 #define __STDC_CONSTANT_MACROS
1720 #include <stdint.h>],
1721 [typedef int8_t my_int8_t;
1722 my_int8_t i8 = INT8_MIN;
1724 typedef int16_t my_int16_t;
1725 my_int16_t i16 = INT16_MIN;
1727 typedef int32_t my_int32_t;
1728 my_int32_t i32 = INT32_MIN;
1730 typedef int64_t my_int64_t;
1731 my_int64_t i64 = INT64_MIN;
1733 typedef int_fast8_t my_int_fast8_t;
1734 my_int_fast8_t if8 = INT_FAST8_MIN;
1735 if8 = INT_FAST8_MAX;
1736 typedef int_fast16_t my_int_fast16_t;
1737 my_int_fast16_t if16 = INT_FAST16_MIN;
1738 if16 = INT_FAST16_MAX;
1739 typedef int_fast32_t my_int_fast32_t;
1740 my_int_fast32_t if32 = INT_FAST32_MIN;
1741 if32 = INT_FAST32_MAX;
1742 typedef int_fast64_t my_int_fast64_t;
1743 my_int_fast64_t if64 = INT_FAST64_MIN;
1744 if64 = INT_FAST64_MAX;
1745 typedef int_least8_t my_int_least8_t;
1746 my_int_least8_t il8 = INT_LEAST8_MIN;
1747 il8 = INT_LEAST8_MAX;
1748 typedef int_least16_t my_int_least16_t;
1749 my_int_least16_t il16 = INT_LEAST16_MIN;
1750 il16 = INT_LEAST16_MAX;
1751 typedef int_least32_t my_int_least32_t;
1752 my_int_least32_t il32 = INT_LEAST32_MIN;
1753 il32 = INT_LEAST32_MAX;
1754 typedef int_least64_t my_int_least64_t;
1755 my_int_least64_t il64 = INT_LEAST64_MIN;
1756 il64 = INT_LEAST64_MAX;
1757 typedef intmax_t my_intmax_t;
1758 my_intmax_t im = INTMAX_MAX;
1760 typedef intptr_t my_intptr_t;
1761 my_intptr_t ip = INTPTR_MAX;
1763 typedef uint8_t my_uint8_t;
1764 my_uint8_t ui8 = UINT8_MAX;
1766 typedef uint16_t my_uint16_t;
1767 my_uint16_t ui16 = UINT16_MAX;
1769 typedef uint32_t my_uint32_t;
1770 my_uint32_t ui32 = UINT32_MAX;
1772 typedef uint64_t my_uint64_t;
1773 my_uint64_t ui64 = UINT64_MAX;
1775 typedef uint_fast8_t my_uint_fast8_t;
1776 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1777 uif8 = UINT_FAST8_MAX;
1778 typedef uint_fast16_t my_uint_fast16_t;
1779 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1780 uif16 = UINT_FAST16_MAX;
1781 typedef uint_fast32_t my_uint_fast32_t;
1782 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1783 uif32 = UINT_FAST32_MAX;
1784 typedef uint_fast64_t my_uint_fast64_t;
1785 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1786 uif64 = UINT_FAST64_MAX;
1787 typedef uint_least8_t my_uint_least8_t;
1788 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1789 uil8 = UINT_LEAST8_MAX;
1790 typedef uint_least16_t my_uint_least16_t;
1791 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1792 uil16 = UINT_LEAST16_MAX;
1793 typedef uint_least32_t my_uint_least32_t;
1794 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1795 uil32 = UINT_LEAST32_MAX;
1796 typedef uint_least64_t my_uint_least64_t;
1797 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1798 uil64 = UINT_LEAST64_MAX;
1799 typedef uintmax_t my_uintmax_t;
1800 my_uintmax_t uim = UINTMAX_MAX;
1802 typedef uintptr_t my_uintptr_t;
1803 my_uintptr_t uip = UINTPTR_MAX;
1805 ],[glibcxx_cv_c99_stdint_tr1=yes],
1806 [glibcxx_cv_c99_stdint_tr1=no])
1808 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1809 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1810 [Define if C99 types in <stdint.h> should be imported in
1811 <tr1/cstdint> in namespace std::tr1.])
1814 # Check for the existence of <math.h> functions.
1815 AC_CACHE_CHECK([for ISO C99 support to TR1 in <math.h>],
1816 glibcxx_cv_c99_math_tr1, [
1817 AC_TRY_COMPILE([#include <math.h>],
1818 [typedef double_t my_double_t;
1819 typedef float_t my_float_t;
1833 copysignf(0.0f, 0.0f);
1834 copysignl(0.0l, 0.0l);
1851 fmaf(0.0f, 0.0f, 0.0f);
1852 fmal(0.0l, 0.0l, 0.0l);
1868 #ifndef __APPLE__ /* see below */
1897 nextafter(0.0, 0.0);
1898 nextafterf(0.0f, 0.0f);
1899 nextafterl(0.0l, 0.0l);
1900 nexttoward(0.0, 0.0);
1901 nexttowardf(0.0f, 0.0f);
1902 nexttowardl(0.0l, 0.0l);
1903 remainder(0.0, 0.0);
1904 remainderf(0.0f, 0.0f);
1905 remainderl(0.0l, 0.0l);
1906 remquo(0.0, 0.0, 0);
1907 remquof(0.0f, 0.0f, 0);
1908 remquol(0.0l, 0.0l, 0);
1927 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1929 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1930 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1931 [Define if C99 functions or macros in <math.h> should be imported
1932 in <tr1/cmath> in namespace std::tr1.])
1934 case "${target_os}" in
1936 AC_CACHE_CHECK([for ISO C99 rounding functions in <math.h>],
1937 glibcxx_cv_c99_math_llround, [
1938 AC_TRY_COMPILE([#include <math.h>],
1946 [glibcxx_cv_c99_math_llround=yes],
1947 [glibcxx_cv_c99_math_llround=no])
1951 if test x"$glibcxx_cv_c99_math_llround" = x"no"; then
1952 AC_DEFINE(_GLIBCXX_NO_C99_ROUNDING_FUNCS, 1,
1953 [Define if C99 llrint and llround functions are missing from <math.h>.])
1957 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1958 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1959 ac_c99_inttypes_tr1=no;
1960 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1961 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1962 AC_TRY_COMPILE([#include <inttypes.h>],
1963 [intmax_t i, numer, denom, base;
1966 intmax_t ret = imaxabs(i);
1967 imaxdiv_t dret = imaxdiv(numer, denom);
1968 ret = strtoimax(s, endptr, base);
1969 uintmax_t uret = strtoumax(s, endptr, base);
1970 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1971 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1973 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1974 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1975 [Define if C99 functions in <inttypes.h> should be imported in
1976 <tr1/cinttypes> in namespace std::tr1.])
1979 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
1980 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1981 ac_c99_inttypes_wchar_t_tr1=no;
1982 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1983 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1984 AC_TRY_COMPILE([#include <inttypes.h>],
1988 intmax_t ret = wcstoimax(s, endptr, base);
1989 uintmax_t uret = wcstoumax(s, endptr, base);
1990 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1991 [ac_c99_inttypes_wchar_t_tr1=no])
1992 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1994 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
1995 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
1996 [Define if wchar_t C99 functions in <inttypes.h> should be
1997 imported in <tr1/cinttypes> in namespace std::tr1.])
2000 # Check for the existence of the <stdbool.h> header.
2001 AC_CHECK_HEADERS(stdbool.h)
2003 # Check for the existence of the <stdalign.h> header.
2004 AC_CHECK_HEADERS(stdalign.h)
2006 CXXFLAGS="$ac_save_CXXFLAGS"
2011 dnl Check for uchar.h and usability.
2013 AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [
2016 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no)
2020 ac_save_CXXFLAGS="$CXXFLAGS"
2021 CXXFLAGS="$CXXFLAGS -std=c++11"
2023 if test x"$ac_has_uchar_h" = x"yes"; then
2024 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>])
2025 AC_TRY_COMPILE([#include <uchar.h>
2026 #ifdef __STDC_UTF_16__
2027 long i = __STDC_UTF_16__;
2029 #ifdef __STDC_UTF_32__
2030 long j = __STDC_UTF_32__;
2040 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no])
2041 AC_MSG_RESULT($ac_c11_uchar_cxx11)
2043 ac_c11_uchar_cxx11=no
2045 if test x"$ac_c11_uchar_cxx11" = x"yes"; then
2046 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1,
2047 [Define if C11 functions in <uchar.h> should be imported into
2048 namespace std in <cuchar>.])
2051 CXXFLAGS="$CXXFLAGS -fchar8_t"
2052 if test x"$ac_has_uchar_h" = x"yes"; then
2053 AC_MSG_CHECKING([for c8rtomb and mbrtoc8 in <uchar.h> with -fchar8_t])
2054 AC_TRY_COMPILE([#include <uchar.h>
2061 [], [ac_uchar_c8rtomb_mbrtoc8_fchar8_t=yes],
2062 [ac_uchar_c8rtomb_mbrtoc8_fchar8_t=no])
2064 ac_uchar_c8rtomb_mbrtoc8_fchar8_t=no
2066 AC_MSG_RESULT($ac_uchar_c8rtomb_mbrtoc8_fchar8_t)
2067 if test x"$ac_uchar_c8rtomb_mbrtoc8_fchar8_t" = x"yes"; then
2068 AC_DEFINE(_GLIBCXX_USE_UCHAR_C8RTOMB_MBRTOC8_FCHAR8_T, 1,
2069 [Define if c8rtomb and mbrtoc8 functions in <uchar.h> should be
2070 imported into namespace std in <cuchar> for -fchar8_t.])
2073 CXXFLAGS="$CXXFLAGS -std=c++20"
2074 if test x"$ac_has_uchar_h" = x"yes"; then
2075 AC_MSG_CHECKING([for c8rtomb and mbrtoc8 in <uchar.h> with -std=c++20])
2076 AC_TRY_COMPILE([#include <uchar.h>
2083 [], [ac_uchar_c8rtomb_mbrtoc8_cxx20=yes],
2084 [ac_uchar_c8rtomb_mbrtoc8_cxx20=no])
2086 ac_uchar_c8rtomb_mbrtoc8_cxx20=no
2088 AC_MSG_RESULT($ac_uchar_c8rtomb_mbrtoc8_cxx20)
2089 if test x"$ac_uchar_c8rtomb_mbrtoc8_cxx20" = x"yes"; then
2090 AC_DEFINE(_GLIBCXX_USE_UCHAR_C8RTOMB_MBRTOC8_CXX20, 1,
2091 [Define if c8rtomb and mbrtoc8 functions in <uchar.h> should be
2092 imported into namespace std in <cuchar> for C++20.])
2095 CXXFLAGS="$ac_save_CXXFLAGS"
2101 dnl Check whether "/dev/random" and "/dev/urandom" are available for
2102 dnl class std::random_device from C++ 2011 [rand.device], and
2103 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
2105 AC_DEFUN([GLIBCXX_CHECK_DEV_RANDOM], [
2107 AC_CACHE_CHECK([for "/dev/random" and "/dev/urandom" for std::random_device],
2108 glibcxx_cv_dev_random, [
2109 if test -r /dev/random && test -r /dev/urandom; then
2110 ## For MSys environment the test above is detected as false-positive
2111 ## on mingw-targets. So disable it explicitly for them.
2112 case ${target_os} in
2113 *mingw*) glibcxx_cv_dev_random=no ;;
2114 *) glibcxx_cv_dev_random=yes ;;
2117 glibcxx_cv_dev_random=no;
2121 if test x"$glibcxx_cv_dev_random" = x"yes"; then
2122 AC_DEFINE(_GLIBCXX_USE_DEV_RANDOM, 1,
2123 [Define if /dev/random and /dev/urandom are available for
2124 std::random_device.])
2125 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
2126 [Define if /dev/random and /dev/urandom are available for
2127 the random_device of TR1 (Chapter 5.1).])
2133 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
2135 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
2137 if test "$is_hosted" = yes; then
2138 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
2139 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
2140 [#include <stdio.h>],
2141 [AC_MSG_ERROR([computing EOF failed])])
2143 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
2144 [Define to the value of the EOF integer constant.])
2146 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
2147 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
2148 [#include <stdio.h>],
2149 [AC_MSG_ERROR([computing SEEK_CUR failed])])
2151 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
2152 [Define to the value of the SEEK_CUR integer constant.])
2154 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
2155 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
2156 [#include <stdio.h>],
2157 [AC_MSG_ERROR([computing SEEK_END failed])])
2159 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
2160 [Define to the value of the SEEK_END integer constant.])
2165 dnl Check whether required C++ overloads are present in <stdio.h>.
2167 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
2171 # Use C++11 because a conforming <stdio.h> won't define gets for C++14,
2172 # and we don't need a declaration for C++14 anyway.
2173 ac_save_CXXFLAGS="$CXXFLAGS"
2174 CXXFLAGS="$CXXFLAGS -std=gnu++11"
2176 AC_CACHE_CHECK([for gets declaration], glibcxx_cv_gets, [
2177 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2184 [glibcxx_cv_gets=yes],
2185 [glibcxx_cv_gets=no]
2188 if test $glibcxx_cv_gets = yes; then
2189 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.])
2192 CXXFLAGS="$ac_save_CXXFLAGS"
2197 dnl Check whether required C++11 overloads for floating point and integral
2198 dnl types are present in <math.h>.
2200 AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
2204 ac_save_CXXFLAGS="$CXXFLAGS"
2205 CXXFLAGS="$CXXFLAGS -std=c++11"
2209 # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch
2210 # 11996[67]-02 introduced the C++11 <math.h> floating point overloads.
2211 AC_CACHE_CHECK([for C++11 <math.h> floating point overloads],
2212 glibcxx_cv_math11_fp_overload, [
2213 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2217 inline bool isfinite(float __x)
2218 { return __builtin_isfinite(__x); }
2221 [glibcxx_cv_math11_fp_overload=no],
2222 [glibcxx_cv_math11_fp_overload=yes]
2225 # autoheader cannot handle indented templates.
2226 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP],
2227 [/* Define if all C++11 floating point overloads are available in <math.h>. */
2228 #if __cplusplus >= 201103L
2229 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP
2232 if test $glibcxx_cv_math11_fp_overload = yes; then
2233 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP)
2236 # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch
2237 # 11996[67]-02 introduced the C++11 <math.h> integral type overloads.
2238 AC_CACHE_CHECK([for C++11 <math.h> integral type overloads],
2239 glibcxx_cv_math11_int_overload, [
2240 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2243 template<typename _Tp>
2244 struct __is_integer;
2246 struct __is_integer<int>
2248 enum { __value = 1 };
2251 namespace __gnu_cxx {
2252 template<bool, typename>
2254 template<typename _Tp>
2255 struct __enable_if<true, _Tp>
2256 { typedef _Tp __type; };
2259 template<typename _Tp>
2260 constexpr typename __gnu_cxx::__enable_if
2261 <__is_integer<_Tp>::__value, double>::__type
2263 { return __builtin_log2(__x); }
2269 return std::log2(i);
2272 [glibcxx_cv_math11_int_overload=no],
2273 [glibcxx_cv_math11_int_overload=yes]
2276 # autoheader cannot handle indented templates.
2277 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT],
2278 [/* Define if all C++11 integral type overloads are available in <math.h>. */
2279 #if __cplusplus >= 201103L
2280 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT
2283 if test $glibcxx_cv_math11_int_overload = yes; then
2284 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT)
2288 # If <math.h> defines the obsolete isinf(double) and isnan(double)
2289 # functions (instead of or as well as the C99 generic macros) then we
2290 # can't define std::isinf(double) and std::isnan(double) in <cmath>
2291 # and must use the ones from <math.h> instead.
2292 AC_CACHE_CHECK([for obsolete isinf function in <math.h>],
2293 glibcxx_cv_obsolete_isinf, [
2294 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2295 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2301 bool isinf(long double);
2304 bool b = isinf(0.0);
2306 [glibcxx_cv_obsolete_isinf=yes],
2307 [glibcxx_cv_obsolete_isinf=no]
2309 if test $glibcxx_cv_obsolete_isinf = yes; then
2310 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1,
2311 [Define if <math.h> defines obsolete isinf function.])
2314 AC_CACHE_CHECK([for obsolete isnan function in <math.h>],
2315 glibcxx_cv_obsolete_isnan, [
2316 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2317 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2323 bool isnan(long double);
2326 bool b = isnan(0.0);
2328 [glibcxx_cv_obsolete_isnan=yes],
2329 [glibcxx_cv_obsolete_isnan=no]
2331 if test $glibcxx_cv_obsolete_isnan = yes; then
2332 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1,
2333 [Define if <math.h> defines obsolete isnan function.])
2338 CXXFLAGS="$ac_save_CXXFLAGS"
2343 dnl Check for what type of C headers to use.
2345 dnl --enable-cheaders= [does stuff].
2346 dnl --disable-cheaders [does not do anything, really].
2347 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
2348 dnl Where DEFAULT is either 'c' or 'c_global' or 'c_std'.
2350 dnl To use the obsolete 'c_std' headers use --enable-cheaders-obsolete as
2351 dnl well as --enable-cheaders=c_std, otherwise configure will fail.
2353 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
2354 GLIBCXX_ENABLE(cheaders-obsolete,no,,
2355 [allow use of obsolete "C" headers for g++])
2356 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
2357 [construct "C" headers for g++], [permit c|c_global|c_std])
2358 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2359 if test $enable_cheaders = c_std ; then
2360 AC_MSG_WARN([the --enable-cheaders=c_std configuration is obsolete, c_global should be used instead])
2361 AC_MSG_WARN([if you are unable to use c_global please report a bug or inform libstdc++@gcc.gnu.org])
2362 if test $enable_cheaders_obsolete != yes ; then
2363 AC_MSG_ERROR(use --enable-cheaders-obsolete to use c_std "C" headers)
2367 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2369 # Allow overrides to configure.host here.
2370 if test $enable_cheaders = c_global; then
2374 AC_SUBST(C_INCLUDE_DIR)
2375 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2376 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
2377 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
2378 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
2383 dnl Check for which locale library to use. The choice is mapped to
2384 dnl a subdirectory of config/locale.
2386 dnl Default is generic.
2388 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
2389 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
2390 [use MODEL for target locale package],
2391 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
2393 # Deal with gettext issues. Default to not using it (=no) until we detect
2394 # support for it later. Let the user turn it off via --e/d, but let that
2395 # default to on for easier handling.
2398 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2402 # Either a known package, or "auto"
2403 if test $enable_clocale = no || test $enable_clocale = yes; then
2406 enable_clocale_flag=$enable_clocale
2408 # Probe for locale model to use if none specified.
2409 # Default to "generic".
2410 if test $enable_clocale_flag = auto; then
2411 case ${target_os} in
2412 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2413 enable_clocale_flag=gnu
2416 enable_clocale_flag=darwin
2419 enable_clocale_flag=vxworks
2421 dragonfly* | freebsd*)
2422 enable_clocale_flag=dragonfly
2425 enable_clocale_flag=newlib
2428 if test x"$with_newlib" = x"yes"; then
2429 enable_clocale_flag=newlib
2431 enable_clocale_flag=generic
2437 # Sanity check model, and test for special functionality.
2438 if test $enable_clocale_flag = gnu; then
2439 AC_EGREP_CPP([_GLIBCXX_ok], [
2440 #include <features.h>
2441 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
2444 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2446 # Set it to scream when it hurts.
2447 ac_save_CFLAGS="$CFLAGS"
2448 CFLAGS="-Wimplicit-function-declaration -Werror"
2450 # Use strxfrm_l if available.
2451 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2453 #include <locale.h>],
2454 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2455 AC_DEFINE(HAVE_STRXFRM_L, 1,
2456 [Define if strxfrm_l is available in <string.h>.]),)
2458 # Use strerror_l if available.
2459 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2461 #include <locale.h>],
2462 [__locale_t loc; strerror_l(5, loc);],
2463 AC_DEFINE(HAVE_STRERROR_L, 1,
2464 [Define if strerror_l is available in <string.h>.]),)
2466 CFLAGS="$ac_save_CFLAGS"
2469 # Perhaps use strerror_r if available, and strerror_l isn't.
2470 ac_save_CFLAGS="$CFLAGS"
2471 CFLAGS="-Wimplicit-function-declaration -Werror"
2472 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2474 #include <locale.h>],
2475 [char s[128]; strerror_r(5, s, 128);],
2476 AC_DEFINE(HAVE_STRERROR_R, 1,
2477 [Define if strerror_r is available in <string.h>.]),)
2478 CFLAGS="$ac_save_CFLAGS"
2480 # Set configure bits for specified locale package
2481 AC_MSG_CHECKING([for C locale to use])
2482 case ${enable_clocale_flag} in
2484 AC_MSG_RESULT(generic)
2486 CLOCALE_H=config/locale/generic/c_locale.h
2487 CLOCALE_CC=config/locale/generic/c_locale.cc
2488 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2489 CCOLLATE_CC=config/locale/generic/collate_members.cc
2490 CCTYPE_CC=config/locale/generic/ctype_members.cc
2491 CMESSAGES_H=config/locale/generic/messages_members.h
2492 CMESSAGES_CC=config/locale/generic/messages_members.cc
2493 CMONEY_CC=config/locale/generic/monetary_members.cc
2494 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2495 CTIME_H=config/locale/generic/time_members.h
2496 CTIME_CC=config/locale/generic/time_members.cc
2497 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2500 AC_MSG_RESULT(darwin)
2502 CLOCALE_H=config/locale/generic/c_locale.h
2503 CLOCALE_CC=config/locale/generic/c_locale.cc
2504 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2505 CCOLLATE_CC=config/locale/generic/collate_members.cc
2506 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2507 CMESSAGES_H=config/locale/generic/messages_members.h
2508 CMESSAGES_CC=config/locale/generic/messages_members.cc
2509 CMONEY_CC=config/locale/generic/monetary_members.cc
2510 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2511 CTIME_H=config/locale/generic/time_members.h
2512 CTIME_CC=config/locale/generic/time_members.cc
2513 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2516 AC_MSG_RESULT(vxworks)
2518 CLOCALE_H=config/locale/generic/c_locale.h
2519 CLOCALE_CC=config/locale/generic/c_locale.cc
2520 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2521 CCOLLATE_CC=config/locale/generic/collate_members.cc
2522 CCTYPE_CC=config/locale/vxworks/ctype_members.cc
2523 CMESSAGES_H=config/locale/generic/messages_members.h
2524 CMESSAGES_CC=config/locale/generic/messages_members.cc
2525 CMONEY_CC=config/locale/generic/monetary_members.cc
2526 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2527 CTIME_H=config/locale/generic/time_members.h
2528 CTIME_CC=config/locale/generic/time_members.cc
2529 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2532 AC_MSG_RESULT(dragonfly or freebsd)
2534 CLOCALE_H=config/locale/dragonfly/c_locale.h
2535 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
2536 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2537 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
2538 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2539 CMESSAGES_H=config/locale/generic/messages_members.h
2540 CMESSAGES_CC=config/locale/generic/messages_members.cc
2541 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2542 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2543 CTIME_H=config/locale/dragonfly/time_members.h
2544 CTIME_CC=config/locale/dragonfly/time_members.cc
2545 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2551 # Declare intention to use gettext, and add support for specific
2553 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2556 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2557 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2558 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2561 # Export the build objects.
2562 for ling in $ALL_LINGUAS; do \
2563 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2564 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2566 AC_SUBST(glibcxx_MOFILES)
2567 AC_SUBST(glibcxx_POFILES)
2569 CLOCALE_H=config/locale/gnu/c_locale.h
2570 CLOCALE_CC=config/locale/gnu/c_locale.cc
2571 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2572 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2573 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2574 CMESSAGES_H=config/locale/gnu/messages_members.h
2575 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2576 CMONEY_CC=config/locale/gnu/monetary_members.cc
2577 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2578 CTIME_H=config/locale/gnu/time_members.h
2579 CTIME_CC=config/locale/gnu/time_members.cc
2580 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2583 AC_MSG_RESULT(IEEE 1003.1)
2585 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2586 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2587 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2588 CCOLLATE_CC=config/locale/generic/collate_members.cc
2589 CCTYPE_CC=config/locale/generic/ctype_members.cc
2590 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2591 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2592 CMONEY_CC=config/locale/generic/monetary_members.cc
2593 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2594 CTIME_H=config/locale/generic/time_members.h
2595 CTIME_CC=config/locale/generic/time_members.cc
2596 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2599 AC_MSG_RESULT(newlib)
2601 CLOCALE_H=config/locale/generic/c_locale.h
2602 CLOCALE_CC=config/locale/generic/c_locale.cc
2603 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2604 CCOLLATE_CC=config/locale/generic/collate_members.cc
2605 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2606 CMESSAGES_H=config/locale/generic/messages_members.h
2607 CMESSAGES_CC=config/locale/generic/messages_members.cc
2608 CMONEY_CC=config/locale/generic/monetary_members.cc
2609 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2610 CTIME_H=config/locale/generic/time_members.h
2611 CTIME_CC=config/locale/generic/time_members.cc
2612 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2616 # This is where the testsuite looks for locale catalogs, using the
2617 # -DLOCALEDIR define during testsuite compilation.
2618 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2619 AC_SUBST(glibcxx_localedir)
2621 # A standalone libintl (e.g., GNU libintl) may be in use.
2622 if test $USE_NLS = yes; then
2623 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2624 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2626 if test $USE_NLS = yes; then
2627 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2628 [Define if NLS translations are to be used.])
2633 AC_SUBST(CMESSAGES_H)
2634 AC_SUBST(CCODECVT_CC)
2635 AC_SUBST(CCOLLATE_CC)
2637 AC_SUBST(CMESSAGES_CC)
2639 AC_SUBST(CNUMERIC_CC)
2642 AC_SUBST(CLOCALE_CC)
2643 AC_SUBST(CLOCALE_INTERNAL_H)
2648 dnl Check for which std::allocator base class to use. The choice is
2649 dnl mapped from a subdirectory of include/ext.
2653 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2654 AC_MSG_CHECKING([for std::allocator base class])
2655 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2656 [use KIND for target std::allocator base],
2657 [permit new|malloc|yes|no|auto])
2659 # If they didn't use this option switch, or if they specified --enable
2660 # with no specific model, we'll have to look for one. If they
2661 # specified --disable (???), do likewise.
2662 if test $enable_libstdcxx_allocator = no ||
2663 test $enable_libstdcxx_allocator = yes;
2665 enable_libstdcxx_allocator=auto
2668 # Either a known package, or "auto". Auto implies the default choice
2669 # for a particular platform.
2670 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2672 # Probe for host-specific support if no specific model is specified.
2674 if test $enable_libstdcxx_allocator_flag = auto; then
2675 case ${target_os} in
2676 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2677 enable_libstdcxx_allocator_flag=new
2680 enable_libstdcxx_allocator_flag=new
2684 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2687 # Set configure bits for specified locale package
2688 case ${enable_libstdcxx_allocator_flag} in
2690 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2691 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2694 ALLOCATOR_H=config/allocator/new_allocator_base.h
2695 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2699 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW,
2700 test $enable_libstdcxx_allocator_flag = new)
2701 AC_SUBST(ALLOCATOR_H)
2702 AC_SUBST(ALLOCATOR_NAME)
2707 dnl Check for whether the Boost-derived checks should be turned on.
2709 dnl --enable-concept-checks turns them on.
2710 dnl --disable-concept-checks leaves them off.
2711 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2712 dnl Where DEFAULT is either `yes' or `no'.
2714 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2715 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2716 if test $enable_concept_checks = yes; then
2717 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2718 [Define to use concept checking code from the boost libraries.])
2723 dnl Use extern templates.
2725 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2726 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2728 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2729 dnl Where DEFAULT is `yes' or `no'.
2731 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2733 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2735 AC_MSG_CHECKING([for extern template support])
2736 AC_MSG_RESULT([$enable_extern_template])
2738 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2742 dnl Use vtable verification.
2744 dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2745 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2747 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2748 dnl Where DEFAULT is `yes' or `no'.
2750 AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2752 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2754 AC_MSG_CHECKING([for vtable verify support])
2755 AC_MSG_RESULT([$enable_vtable_verify])
2758 if test $enable_vtable_verify = yes; then
2759 case ${target_os} in
2761 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2762 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2766 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2767 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2770 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2771 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2774 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2775 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2778 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2785 AC_SUBST(VTV_CXXFLAGS)
2786 AC_SUBST(VTV_PCH_CXXFLAGS)
2787 AC_SUBST(VTV_CXXLINKFLAGS)
2788 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2789 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2793 dnl Check for parallel mode pre-requisites, including OpenMP support.
2795 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2797 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2801 # See if configured libgomp/omp.h exists. (libgomp may be in
2802 # noconfigdirs but not explicitly disabled.)
2803 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2804 enable_parallel=yes;
2806 AC_MSG_NOTICE([target-libgomp not built])
2809 AC_MSG_CHECKING([for parallel mode support])
2810 AC_MSG_RESULT([$enable_parallel])
2815 dnl Check for which I/O library to use: stdio and POSIX, or pure stdio.
2817 dnl Default is stdio_posix.
2819 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2820 AC_MSG_CHECKING([for underlying I/O to use])
2821 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2822 [use target-specific I/O package], [permit stdio|stdio_posix|stdio_pure])
2824 # The only available I/O model is based on stdio, via basic_file_stdio.
2825 # The default "stdio" is actually "stdio + POSIX" because it uses fdopen(3)
2826 # to get a file descriptor and then uses read(3) and write(3) with it.
2827 # The "stdio_pure" model doesn't use fdopen and only uses FILE* for I/O.
2828 case ${enable_cstdio} in
2830 CSTDIO_H=config/io/c_io_stdio.h
2831 BASIC_FILE_H=config/io/basic_file_stdio.h
2832 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2834 if test "x$enable_cstdio" = "xstdio_pure" ; then
2835 AC_MSG_RESULT([stdio (without POSIX read/write)])
2836 AC_DEFINE(_GLIBCXX_USE_STDIO_PURE, 1,
2837 [Define to restrict std::__basic_file<> to stdio APIs.])
2839 AC_MSG_RESULT([stdio (with POSIX read/write)])
2845 AC_SUBST(BASIC_FILE_H)
2846 AC_SUBST(BASIC_FILE_CC)
2851 dnl Check for "unusual" flags to pass to the compiler while building.
2853 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2854 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2855 dnl --disable-cxx-flags passes nothing.
2856 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2857 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2858 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2859 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2860 dnl If "default flags" is an empty string, the effect is the same
2861 dnl as --disable or --enable=no.
2863 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2864 AC_MSG_CHECKING([for extra compiler flags for building])
2865 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2866 [pass compiler FLAGS when building library],
2867 [case "x$enable_cxx_flags" in
2868 xno | x) enable_cxx_flags= ;;
2870 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2873 # Run through flags (either default or command-line) and set anything
2874 # extra (e.g., #defines) that must accompany particular g++ options.
2875 if test -n "$enable_cxx_flags"; then
2876 for f in $enable_cxx_flags; do
2880 *) # and we're trying to pass /what/ exactly?
2881 AC_MSG_ERROR([compiler flags start with a -]) ;;
2886 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2887 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2888 AC_SUBST(EXTRA_CXX_FLAGS)
2893 dnl Check to see if debugging libraries are to be built.
2895 dnl --enable-libstdcxx-debug
2896 dnl builds a separate set of debugging libraries in addition to the
2897 dnl normal (shared, static) libstdc++ binaries.
2899 dnl --disable-libstdcxx-debug
2900 dnl builds only one (non-debug) version of libstdc++.
2902 dnl --enable-libstdcxx-debug-flags=FLAGS
2903 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2905 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2906 dnl Where DEFAULT is either `yes' or `no'.
2908 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2909 AC_MSG_CHECKING([for additional debug build])
2911 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2912 if test x$enable_libstdcxx_debug = xyes; then
2913 if test -f $toplevel_builddir/../stage_final \
2914 && test -f $toplevel_builddir/../stage_current; then
2915 stage_final=`cat $toplevel_builddir/../stage_final`
2916 stage_current=`cat $toplevel_builddir/../stage_current`
2917 if test x$stage_current != x$stage_final ; then
2918 skip_debug_build=" (skipped for bootstrap stage $stage_current)"
2919 enable_libstdcxx_debug=no
2923 AC_MSG_RESULT($enable_libstdcxx_debug$skip_debug_build)
2924 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2929 dnl Check for explicit debug flags.
2931 dnl --enable-libstdcxx-debug-flags='-O1'
2932 dnl is a general method for passing flags to be used when
2933 dnl building debug libraries with --enable-libstdcxx-debug.
2935 dnl --disable-libstdcxx-debug-flags does nothing.
2936 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2937 dnl If "default flags" is an empty string, the effect is the same
2938 dnl as --disable or --enable=no.
2940 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2941 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2942 [pass compiler FLAGS when building debug library],
2943 [case "x$enable_libstdcxx_debug_flags" in
2944 xno | x) enable_libstdcxx_debug_flags= ;;
2946 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2949 # Option parsed, now set things appropriately
2950 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2951 AC_SUBST(DEBUG_FLAGS)
2953 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2958 dnl Check if the user only wants a freestanding library implementation.
2960 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2961 dnl installing only the headers required by [17.4.1.3] and the language
2962 dnl support library. More than that will be built (to keep the Makefiles
2963 dnl conveniently clean), but not installed.
2966 dnl is_hosted (yes/no)
2969 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2971 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2972 AC_ARG_ENABLE([hosted-libstdcxx],
2973 AC_HELP_STRING([--disable-hosted-libstdcxx],
2974 [only build freestanding C++ runtime support]),,
2977 enable_hosted_libstdcxx=no
2980 enable_hosted_libstdcxx=yes
2984 if test "$enable_hosted_libstdcxx" = no; then
2985 AC_MSG_NOTICE([Only freestanding libraries will be built])
2989 enable_libstdcxx_pch=no
2990 if test "x$with_headers" = xno; then
2991 freestanding_flags="-ffreestanding"
2997 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2998 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2999 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
3000 FREESTANDING_FLAGS="$freestanding_flags"
3001 AC_SUBST(FREESTANDING_FLAGS)
3006 dnl Check if the user wants a non-verbose library implementation.
3008 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
3009 dnl standard error on termination.
3012 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
3014 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
3015 AC_ARG_ENABLE([libstdcxx-verbose],
3016 AC_HELP_STRING([--disable-libstdcxx-verbose],
3017 [disable termination messages to standard error]),,
3018 [enable_libstdcxx_verbose=yes])
3019 if test x"$enable_libstdcxx_verbose" = xyes; then
3022 AC_MSG_NOTICE([verbose termination messages are disabled])
3025 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
3026 [Define to 1 if a verbose library is built, or 0 otherwise.])
3031 dnl Check for template specializations for the 'long long' type.
3032 dnl The result determines only whether 'long long' I/O is enabled; things
3033 dnl like numeric_limits<> specializations are always available.
3035 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
3036 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
3037 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
3038 dnl Where DEFAULT is either `yes' or `no'.
3040 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
3041 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
3042 if test $enable_long_long = yes; then
3043 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
3044 [Define if code specialized for long long should be used.])
3046 AC_MSG_CHECKING([for enabled long long specializations])
3047 AC_MSG_RESULT([$enable_long_long])
3052 dnl Check for decimal floating point.
3054 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
3056 dnl This checks to see if the host supports decimal floating point types.
3059 dnl _GLIBCXX_USE_DECIMAL_FLOAT
3061 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
3063 # Fake what AC_TRY_COMPILE does, without linking as this is
3064 # unnecessary for this test.
3066 cat > conftest.$ac_ext << EOF
3067 [#]line __oline__ "configure"
3077 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
3078 if AC_TRY_EVAL(ac_compile); then
3079 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
3080 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
3085 AC_MSG_RESULT($enable_dfp)
3090 dnl Check for GNU 128-bit floating point type.
3092 dnl Note: also checks that the type isn't a standard types.
3097 AC_DEFUN([GLIBCXX_ENABLE_FLOAT128], [
3102 # Fake what AC_TRY_COMPILE does, without linking as this is
3103 # unnecessary for this test.
3105 cat > conftest.$ac_ext << EOF
3106 [#]line __oline__ "configure"
3107 template<typename T1, typename T2>
3109 { typedef T2 type; };
3111 template<typename T>
3116 typename same<double, __float128>::type f1;
3117 typename same<long double, __float128>::type f2;
3121 AC_MSG_CHECKING([for __float128])
3122 if AC_TRY_EVAL(ac_compile); then
3127 AC_MSG_RESULT($enable_float128)
3128 GLIBCXX_CONDITIONAL(ENABLE_FLOAT128, test $enable_float128 = yes)
3135 dnl Check for template specializations for the 'wchar_t' type.
3137 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3138 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3139 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3140 dnl Where DEFAULT is either `yes' or `no'.
3142 dnl Necessary support must also be present.
3144 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3145 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
3147 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3148 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3149 AC_MSG_CHECKING([for mbstate_t])
3150 AC_TRY_COMPILE([#include <wchar.h>],
3151 [mbstate_t teststate;],
3152 have_mbstate_t=yes, have_mbstate_t=no)
3153 AC_MSG_RESULT($have_mbstate_t)
3154 if test x"$have_mbstate_t" = xyes; then
3155 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3158 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3160 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
3162 if test x"$enable_wchar_t" = x"yes"; then
3167 if test x"$ac_has_wchar_h" = xyes &&
3168 test x"$ac_has_wctype_h" = xyes; then
3169 AC_TRY_COMPILE([#include <wchar.h>
3230 ],[],[], [enable_wchar_t=no])
3238 if test x"$enable_wchar_t" = x"yes"; then
3239 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
3240 [Define if code specialized for wchar_t should be used.])
3243 AC_MSG_CHECKING([for enabled wchar_t specializations])
3244 AC_MSG_RESULT([$enable_wchar_t])
3249 dnl Check to see if building and using a C++ precompiled header can be done.
3251 dnl --enable-libstdcxx-pch=yes
3252 dnl default, this shows intent to use stdc++.h.gch If it looks like it
3253 dnl may work, after some light-hearted attempts to puzzle out compiler
3254 dnl support, flip bits on in include/Makefile.am
3256 dnl --disable-libstdcxx-pch
3257 dnl turns off attempts to use or build stdc++.h.gch.
3260 dnl glibcxx_PCHFLAGS
3262 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
3263 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
3264 if test $enable_libstdcxx_pch = yes; then
3265 AC_CACHE_CHECK([for compiler with PCH support],
3266 [glibcxx_cv_prog_CXX_pch],
3267 [ac_save_CXXFLAGS="$CXXFLAGS"
3268 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3271 echo '#include <math.h>' > conftest.h
3272 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
3273 -o conftest.h.gch 1>&5 2>&1 &&
3274 echo '#error "pch failed"' > conftest.h &&
3275 echo '#include "conftest.h"' > conftest.cc &&
3276 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3278 glibcxx_cv_prog_CXX_pch=yes
3280 glibcxx_cv_prog_CXX_pch=no
3283 CXXFLAGS=$ac_save_CXXFLAGS
3286 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
3289 AC_MSG_CHECKING([for enabled PCH])
3290 AC_MSG_RESULT([$enable_libstdcxx_pch])
3292 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
3293 if test $enable_libstdcxx_pch = yes; then
3294 glibcxx_PCHFLAGS="-include bits/stdc++.h"
3298 AC_SUBST(glibcxx_PCHFLAGS)
3303 dnl Check for atomic builtins.
3305 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
3307 dnl This checks to see if the host supports the compiler-generated
3308 dnl builtins for atomic operations for various integral sizes. Note, this
3309 dnl is intended to be an all-or-nothing switch, so all the atomic operations
3310 dnl that are used should be checked.
3313 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
3315 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
3318 old_CXXFLAGS="$CXXFLAGS"
3320 # Do link tests if possible, instead asm tests, limited to some platforms
3321 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3322 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3323 atomic_builtins_link_tests=no
3324 if test x$gcc_no_link != xyes; then
3325 # Can do link tests. Limit to some tested platforms
3327 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3328 atomic_builtins_link_tests=yes
3333 if test x$atomic_builtins_link_tests = xyes; then
3337 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3339 AC_CACHE_CHECK([for atomic builtins for bool],
3340 glibcxx_cv_atomic_bool, [
3343 [typedef bool atomic_type;
3347 // N.B. __atomic_fetch_add is not supported for bool.
3348 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3350 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3351 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3353 [glibcxx_cv_atomic_bool=yes],
3354 [glibcxx_cv_atomic_bool=no])
3357 AC_CACHE_CHECK([for atomic builtins for short],
3358 glibcxx_cv_atomic_short, [
3361 [typedef short atomic_type;
3365 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3366 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3368 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3369 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3371 [glibcxx_cv_atomic_short=yes],
3372 [glibcxx_cv_atomic_short=no])
3375 AC_CACHE_CHECK([for atomic builtins for int],
3376 glibcxx_cv_atomic_int, [
3379 [typedef int atomic_type;
3383 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3384 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3386 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3387 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3389 [glibcxx_cv_atomic_int=yes],
3390 [glibcxx_cv_atomic_int=no])
3393 AC_CACHE_CHECK([for atomic builtins for long long],
3394 glibcxx_cv_atomic_long_long, [
3397 [typedef long long atomic_type;
3401 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3402 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3404 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3405 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3407 [glibcxx_cv_atomic_long_long=yes],
3408 [glibcxx_cv_atomic_long_long=no])
3415 # Compile unoptimized.
3418 # Fake what AC_TRY_COMPILE does.
3420 cat > conftest.$ac_ext << EOF
3421 [#]line __oline__ "configure"
3424 typedef bool atomic_type;
3428 // N.B. __atomic_fetch_add is not supported for bool.
3429 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3431 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3432 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3438 AC_MSG_CHECKING([for atomic builtins for bool])
3439 if AC_TRY_EVAL(ac_compile); then
3440 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3441 glibcxx_cv_atomic_bool=no
3443 glibcxx_cv_atomic_bool=yes
3446 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3449 cat > conftest.$ac_ext << EOF
3450 [#]line __oline__ "configure"
3453 typedef short atomic_type;
3457 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3458 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3460 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3461 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3467 AC_MSG_CHECKING([for atomic builtins for short])
3468 if AC_TRY_EVAL(ac_compile); then
3469 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3470 glibcxx_cv_atomic_short=no
3472 glibcxx_cv_atomic_short=yes
3475 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3478 cat > conftest.$ac_ext << EOF
3479 [#]line __oline__ "configure"
3482 // NB: _Atomic_word not necessarily int.
3483 typedef int atomic_type;
3487 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3488 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3490 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3491 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3497 AC_MSG_CHECKING([for atomic builtins for int])
3498 if AC_TRY_EVAL(ac_compile); then
3499 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3500 glibcxx_cv_atomic_int=no
3502 glibcxx_cv_atomic_int=yes
3505 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3508 cat > conftest.$ac_ext << EOF
3509 [#]line __oline__ "configure"
3512 typedef long long atomic_type;
3516 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3517 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3519 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3520 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3526 AC_MSG_CHECKING([for atomic builtins for long long])
3527 if AC_TRY_EVAL(ac_compile); then
3528 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3529 glibcxx_cv_atomic_long_long=no
3531 glibcxx_cv_atomic_long_long=yes
3534 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3539 CXXFLAGS="$old_CXXFLAGS"
3542 # Set atomicity_dir to builtins if all but the long long test above passes,
3543 # or if the builtins were already chosen (e.g. by configure.host).
3544 if { test "$glibcxx_cv_atomic_bool" = yes \
3545 && test "$glibcxx_cv_atomic_short" = yes \
3546 && test "$glibcxx_cv_atomic_int" = yes; } \
3547 || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then
3548 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3549 [Define if the compiler supports C++11 atomics.])
3550 atomicity_dir=cpu/generic/atomicity_builtins
3553 # If still generic, set to mutex.
3554 if test $atomicity_dir = "cpu/generic" ; then
3555 atomicity_dir=cpu/generic/atomicity_mutex
3556 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3557 if test "x$target_thread_file" = xsingle; then
3558 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3559 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3561 AC_MSG_WARN([They will be faked using a mutex.])
3562 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3569 dnl Set default lock policy for synchronizing shared_ptr reference counting.
3571 dnl --with-libstdcxx-lock-policy=auto
3572 dnl Use atomic operations for shared_ptr reference counting only if
3573 dnl the default target supports atomic compare-and-swap.
3574 dnl --with-libstdcxx-lock-policy=atomic
3575 dnl Use atomic operations for shared_ptr reference counting.
3576 dnl --with-libstdcxx-lock-policy=mutex
3577 dnl Use a mutex to synchronize shared_ptr reference counting.
3579 dnl This controls the value of __gnu_cxx::__default_lock_policy, which
3580 dnl determines how shared_ptr reference counts are synchronized.
3581 dnl The option "atomic" means that atomic operations should be used,
3582 dnl "mutex" means that a mutex will be used. The default option, "auto",
3583 dnl will check if the target supports the compiler-generated builtins
3584 dnl for atomic compare-and-swap operations for 2-byte and 4-byte integers,
3585 dnl and will use "atomic" if supported, "mutex" otherwise.
3586 dnl This option is ignored if the thread model used by GCC is "single",
3587 dnl as no synchronization is used at all in that case.
3588 dnl This option affects the library ABI (except in the "single" thread model).
3590 dnl Defines _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY to 1 if atomics should be used.
3592 AC_DEFUN([GLIBCXX_ENABLE_LOCK_POLICY], [
3594 AC_ARG_WITH([libstdcxx-lock-policy],
3595 AC_HELP_STRING([--with-libstdcxx-lock-policy={atomic,mutex,auto}],
3596 [synchronization policy for shared_ptr reference counting [default=auto]]),
3597 [libstdcxx_atomic_lock_policy=$withval],
3598 [libstdcxx_atomic_lock_policy=auto])
3600 case "$libstdcxx_atomic_lock_policy" in
3601 atomic|mutex|auto) ;;
3602 *) AC_MSG_ERROR([Invalid argument for --with-libstdcxx-lock-policy]) ;;
3604 AC_MSG_CHECKING([for lock policy for shared_ptr reference counts])
3606 if test x"$libstdcxx_atomic_lock_policy" = x"auto"; then
3609 ac_save_CXXFLAGS="$CXXFLAGS"
3611 dnl Why do we care about 2-byte CAS on targets with 4-byte _Atomic_word?!
3612 dnl Why don't we check 8-byte CAS for sparc64, where _Atomic_word is long?!
3613 dnl New targets should only check for CAS for the _Atomic_word type.
3615 #if ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
3616 # error "No 2-byte compare-and-swap"
3617 #elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
3618 # error "No 4-byte compare-and-swap"
3621 [libstdcxx_atomic_lock_policy=atomic],
3622 [libstdcxx_atomic_lock_policy=mutex])
3624 CXXFLAGS="$ac_save_CXXFLAGS"
3627 if test x"$libstdcxx_atomic_lock_policy" = x"atomic"; then
3628 AC_MSG_RESULT(atomic)
3629 AC_DEFINE(HAVE_ATOMIC_LOCK_POLICY,1,
3630 [Defined if shared_ptr reference counting should use atomic operations.])
3632 AC_MSG_RESULT(mutex)
3638 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3640 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3641 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3642 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3643 dnl Where DEFAULT is 'yes'.
3645 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3646 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3648 if test x$enable_libstdcxx_visibility = xyes ; then
3649 dnl all hail libgfortran
3650 dnl Check whether the target supports hidden visibility.
3651 AC_CACHE_CHECK([whether the target supports hidden visibility],
3652 glibcxx_cv_have_attribute_visibility, [
3653 save_CFLAGS="$CFLAGS"
3654 CFLAGS="$CFLAGS -Werror"
3655 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3656 [], glibcxx_cv_have_attribute_visibility=yes,
3657 glibcxx_cv_have_attribute_visibility=no)
3658 CFLAGS="$save_CFLAGS"])
3659 if test $glibcxx_cv_have_attribute_visibility = no; then
3660 enable_libstdcxx_visibility=no
3664 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3665 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3670 dnl Add version tags to symbols in shared library (or not), additionally
3671 dnl marking other symbols as private/local (or not).
3673 dnl Sets libtool_VERSION, and determines shared library SONAME.
3675 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3677 dnl --enable-symvers=style adds a version script to the linker call when
3678 dnl creating the shared library. The choice of version script is
3679 dnl controlled by 'style'.
3680 dnl --disable-symvers does not.
3682 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3683 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3684 dnl choose a default style based on linker characteristics. Passing
3685 dnl 'no' disables versioning.
3687 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3689 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3690 [enables symbol versioning of the shared library],
3691 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3693 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3694 # don't know enough about $LD to do tricks...
3695 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3696 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3697 # with extern "C++" in version scripts.
3698 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3700 # Turn a 'yes' into a suitable default.
3701 if test x$enable_symvers = xyes ; then
3702 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3705 if test $with_gnu_ld = yes ; then
3706 case ${target_os} in
3708 enable_symvers=no ;;
3710 enable_symvers=gnu ;;
3713 case ${target_os} in
3715 enable_symvers=darwin ;;
3716 # Sun symbol versioning exists since Solaris 2.5.
3717 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3718 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3719 # version scripts, so disable symbol versioning if none can be
3721 if test -z "$ac_cv_path_CXXFILT"; then
3722 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3723 AC_MSG_WARN([=== no GNU c++filt could be found.])
3724 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3731 enable_symvers=no ;;
3737 # Check to see if 'darwin' or 'darwin-export' can win.
3738 if test x$enable_symvers = xdarwin-export ; then
3739 enable_symvers=darwin
3742 # Check if 'sun' was requested on non-Solaris 2 platforms.
3743 if test x$enable_symvers = xsun ; then
3744 case ${target_os} in
3750 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3751 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3752 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3758 # Check to see if 'gnu' can win.
3759 if test $enable_symvers = gnu ||
3760 test $enable_symvers = gnu-versioned-namespace ||
3761 test $enable_symvers = sun; then
3762 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3763 AC_MSG_CHECKING([for shared libgcc])
3764 ac_save_CFLAGS="$CFLAGS"
3766 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3767 CFLAGS="$ac_save_CFLAGS"
3768 if test $glibcxx_shared_libgcc = no; then
3769 cat > conftest.c <<EOF
3770 int main (void) { return 0; }
3773 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3774 -shared -shared-libgcc -o conftest.so \
3775 conftest.c -v 2>&1 >/dev/null \
3776 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3778 rm -f conftest.c conftest.so
3779 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3780 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3781 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3782 CFLAGS="$ac_save_CFLAGS"
3785 AC_MSG_RESULT($glibcxx_shared_libgcc)
3787 # For GNU ld, we need at least this version. The format is described in
3788 # GLIBCXX_CHECK_LINKER_FEATURES above.
3789 glibcxx_min_gnu_ld_version=21400
3791 # If no shared libgcc, can't win.
3792 if test $glibcxx_shared_libgcc != yes; then
3793 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3794 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3795 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3797 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3798 : All interesting versions of Sun ld support sun style symbol versioning.
3799 elif test $with_gnu_ld != yes ; then
3801 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3802 AC_MSG_WARN([=== you are not using the GNU linker.])
3803 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3805 elif test $glibcxx_ld_is_gold = yes ; then
3806 : All versions of gold support symbol versioning.
3807 elif test $glibcxx_ld_is_mold = yes ; then
3808 : All versions of mold support symbol versioning.
3809 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3810 # The right tools, the right setup, but too old. Fallbacks?
3811 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3812 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3813 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3814 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3815 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3820 # For libtool versioning info, format is CURRENT:REVISION:AGE
3821 libtool_VERSION=6:30:0
3823 # Everything parsed; figure out what files and settings to use.
3824 case $enable_symvers in
3826 SYMVER_FILE=config/abi/pre/none.ver
3829 SYMVER_FILE=config/abi/pre/gnu.ver
3830 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3831 [Define to use GNU versioning in the shared library.])
3833 gnu-versioned-namespace)
3834 libtool_VERSION=8:0:0
3835 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3836 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3837 [Define to use GNU namespace versioning in the shared library.])
3840 SYMVER_FILE=config/abi/pre/gnu.ver
3841 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3842 [Define to use darwin versioning in the shared library.])
3845 SYMVER_FILE=config/abi/pre/gnu.ver
3846 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3847 [Define to use Sun versioning in the shared library.])
3851 if test x$enable_symvers != xno ; then
3852 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3853 [Define to use symbol versioning in the shared library.])
3856 AC_CACHE_CHECK([whether the target supports .symver directive],
3857 glibcxx_cv_have_as_symver_directive, [
3858 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3859 [], glibcxx_cv_have_as_symver_directive=yes,
3860 glibcxx_cv_have_as_symver_directive=no)])
3861 if test $glibcxx_cv_have_as_symver_directive = yes; then
3862 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3863 [Define to 1 if the target assembler supports .symver directive.])
3866 AC_SUBST(SYMVER_FILE)
3867 AC_SUBST(port_specific_symbol_files)
3868 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3869 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3870 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3871 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3872 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3873 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3875 if test $enable_symvers != no ; then
3876 case ${target_os} in
3877 # The Solaris 2 runtime linker doesn't support the GNU extension of
3878 # binding the same symbol to different versions
3881 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3883 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3884 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3889 # Now, set up compatibility support, if any.
3890 # In addition, need this to deal with std::size_t mangling in
3891 # src/compatibility.cc. In a perfect world, could use
3892 # typeid(std::size_t).name()[0] to do direct substitution.
3893 AC_MSG_CHECKING([for size_t as unsigned int])
3894 ac_save_CFLAGS="$CFLAGS"
3896 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3897 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3898 CFLAGS=$ac_save_CFLAGS
3899 if test "$glibcxx_size_t_is_i" = yes; then
3900 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3902 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3904 AC_MSG_CHECKING([for ptrdiff_t as int])
3905 ac_save_CFLAGS="$CFLAGS"
3907 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3908 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3909 CFLAGS=$ac_save_CFLAGS
3910 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3911 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3913 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3918 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3919 dnl We must stage the required headers so that they will be installed
3920 dnl with the library (unlike libgcc, the STL implementation is provided
3921 dnl solely within headers). Since we must not inject random user-space
3922 dnl macro names into user-provided C++ code, we first stage into <file>-in
3923 dnl and process to <file> with an output command. The reason for a two-
3924 dnl stage process here is to correctly handle $srcdir!=$objdir without
3925 dnl having to write complex code (the sed commands to clean the macro
3926 dnl namespace are complex and fragile enough as it is). We must also
3927 dnl add a relative path so that -I- is supported properly.
3932 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3933 AC_MSG_CHECKING([for thread model used by GCC])
3934 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3935 AC_MSG_RESULT([$target_thread_file])
3936 GCC_AC_THREAD_HEADER([$target_thread_file])
3941 dnl Check if gthread implementation defines the types and functions
3942 dnl required by the c++0x thread library. Conforming gthread
3943 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3945 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3947 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3948 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3950 if test x$enable_libstdcxx_threads = xauto ||
3951 test x$enable_libstdcxx_threads = xyes; then
3956 ac_save_CXXFLAGS="$CXXFLAGS"
3957 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3958 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3960 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3961 case $target_thread_file in
3963 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3966 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3968 AC_TRY_COMPILE([#include <unistd.h>],
3970 // In case of POSIX threads check _POSIX_TIMEOUTS.
3971 #if (defined(_PTHREADS) \
3972 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3975 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3977 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3978 [Define to 1 if mutex_timedlock is available.])
3980 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3981 else res_mutex_timedlock=no ; fi
3982 AC_MSG_RESULT([$res_mutex_timedlock])
3984 AC_MSG_CHECKING([for gthreads library])
3986 AC_TRY_COMPILE([#include "gthr.h"],
3988 #ifndef __GTHREADS_CXX0X
3991 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3996 AC_MSG_RESULT([$ac_has_gthreads])
3998 if test x"$ac_has_gthreads" = x"yes"; then
3999 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
4000 [Define if gthreads library is available.])
4002 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
4003 # but only do so if we're using pthread in the gthread library.
4004 # On VxWorks for example, pthread_rwlock_t is defined in sys/types.h
4005 # but the pthread library is not there by default and the gthread library
4007 AC_TRY_COMPILE([#include "gthr.h"],
4009 #if (!defined(_PTHREADS))
4012 ], [ac_gthread_use_pthreads=yes], [ac_gthread_use_pthreads=no])
4013 if test x"$ac_gthread_use_pthreads" = x"yes"; then
4014 AC_CHECK_TYPE([pthread_rwlock_t],
4015 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
4016 [Define if POSIX read/write locks are available in <gthr.h>.])],
4018 [#include "gthr.h"])
4022 AC_CHECK_HEADER(semaphore.h, [
4023 AC_MSG_CHECKING([for POSIX Semaphores and sem_timedwait])
4026 #include <semaphore.h>
4030 #if !defined _POSIX_TIMEOUTS || _POSIX_TIMEOUTS <= 0
4031 # error "POSIX Timeouts option not supported"
4032 #elif !defined _POSIX_SEMAPHORES || _POSIX_SEMAPHORES <= 0
4033 # error "POSIX Semaphores option not supported"
4035 #if defined SEM_VALUE_MAX
4036 constexpr int sem_value_max = SEM_VALUE_MAX;
4037 #elif defined _POSIX_SEM_VALUE_MAX
4038 constexpr int sem_value_max = _POSIX_SEM_VALUE_MAX;
4040 # error "SEM_VALUE_MAX not available"
4043 sem_init(&sem, 0, sem_value_max);
4044 struct timespec ts = { 0 };
4045 sem_timedwait(&sem, &ts);
4048 [ac_have_posix_semaphore=yes],
4049 [ac_have_posix_semaphore=no])],
4050 [ac_have_posix_semaphore=no])
4052 if test $ac_have_posix_semaphore = yes ; then
4053 AC_DEFINE(HAVE_POSIX_SEMAPHORE,
4055 [Define to 1 if POSIX Semaphores with sem_timedwait are available in <semaphore.h>.])
4057 AC_MSG_RESULT([$ac_have_posix_semaphore])
4059 CXXFLAGS="$ac_save_CXXFLAGS"
4064 # Check whether LC_MESSAGES is available in <locale.h>.
4065 # Ulrich Drepper <drepper@cygnus.com>, 1995.
4067 # This file file be copied and used freely without restrictions. It can
4068 # be used in projects which are not available under the GNU Public License
4069 # but which still want to provide support for the GNU gettext functionality.
4070 # Please note that the actual code is *not* freely available.
4071 AC_DEFUN([AC_LC_MESSAGES], [
4072 AC_CHECK_HEADER(locale.h, [
4073 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
4074 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
4075 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
4076 if test $ac_cv_val_LC_MESSAGES = yes; then
4077 AC_DEFINE(HAVE_LC_MESSAGES, 1,
4078 [Define if LC_MESSAGES is available in <locale.h>.])
4084 dnl Check whether rdrand is supported in the assembler.
4085 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
4086 AC_CACHE_CHECK([for rdrand support in assembler],
4092 AC_TRY_COMPILE(, [asm("rdrand %eax");],
4093 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
4096 if test $ac_cv_x86_rdrand = yes; then
4097 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
4098 [ Defined if as can handle rdrand. ])
4103 dnl Check whether rdseed is supported in the assembler.
4104 AC_DEFUN([GLIBCXX_CHECK_X86_RDSEED], [
4105 AC_CACHE_CHECK([for rdseed support in assembler],
4111 AC_TRY_COMPILE(, [asm("rdseed %eax");],
4112 [ac_cv_x86_rdseed=yes], [ac_cv_x86_rdseed=no])
4115 if test $ac_cv_x86_rdseed = yes; then
4116 AC_DEFINE(_GLIBCXX_X86_RDSEED, 1,
4117 [ Defined if as can handle rdseed. ])
4122 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
4124 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
4128 ac_save_CXXFLAGS="$CXXFLAGS"
4129 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4131 AC_CACHE_CHECK([for get_nprocs],
4132 glibcxx_cv_GET_NPROCS, [
4133 GCC_TRY_COMPILE_OR_LINK(
4134 [#include <sys/sysinfo.h>],
4135 [int n = get_nprocs();],
4136 [glibcxx_cv_GET_NPROCS=yes],
4137 [glibcxx_cv_GET_NPROCS=no])
4139 if test $glibcxx_cv_GET_NPROCS = yes; then
4140 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
4143 CXXFLAGS="$ac_save_CXXFLAGS"
4148 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
4150 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
4154 ac_save_CXXFLAGS="$CXXFLAGS"
4155 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4157 AC_CACHE_CHECK([for _SC_NPROCESSORS_ONLN],
4158 glibcxx_cv_SC_NPROCESSORS_ONLN, [
4159 GCC_TRY_COMPILE_OR_LINK(
4160 [#include <unistd.h>],
4161 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
4162 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
4163 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
4165 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
4166 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
4169 CXXFLAGS="$ac_save_CXXFLAGS"
4174 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
4176 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
4180 ac_save_CXXFLAGS="$CXXFLAGS"
4181 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4183 AC_CACHE_CHECK([for _SC_NPROC_ONLN],
4184 glibcxx_cv_SC_NPROC_ONLN, [
4185 GCC_TRY_COMPILE_OR_LINK(
4186 [#include <unistd.h>],
4187 [int n = sysconf(_SC_NPROC_ONLN);],
4188 [glibcxx_cv_SC_NPROC_ONLN=yes],
4189 [glibcxx_cv_SC_NPROC_ONLN=no])
4191 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
4192 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
4195 CXXFLAGS="$ac_save_CXXFLAGS"
4200 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
4202 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
4206 ac_save_CXXFLAGS="$CXXFLAGS"
4207 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4209 AC_CACHE_CHECK([for pthreads_num_processors_np],
4210 glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
4211 GCC_TRY_COMPILE_OR_LINK(
4212 [#include <pthread.h>],
4213 [int n = pthread_num_processors_np();],
4214 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
4215 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
4217 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
4218 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
4221 CXXFLAGS="$ac_save_CXXFLAGS"
4226 dnl Check whether pthread_cond_clockwait is available in <pthread.h> for std::condition_variable to use,
4227 dnl and define _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT.
4229 AC_DEFUN([GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT], [
4233 ac_save_CXXFLAGS="$CXXFLAGS"
4234 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4235 ac_save_LIBS="$LIBS"
4236 LIBS="$LIBS -lpthread"
4238 AC_CACHE_CHECK([for pthread_cond_clockwait],
4239 glibcxx_cv_PTHREAD_COND_CLOCKWAIT, [
4240 GCC_TRY_COMPILE_OR_LINK(
4241 [#include <pthread.h>],
4242 [pthread_mutex_t mutex; pthread_cond_t cond; struct timespec ts; int n = pthread_cond_clockwait(&cond, &mutex, 0, &ts);],
4243 [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=yes],
4244 [glibcxx_cv_PTHREAD_COND_CLOCKWAIT=no])
4246 if test $glibcxx_cv_PTHREAD_COND_CLOCKWAIT = yes; then
4247 AC_DEFINE(_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT, 1, [Define if pthread_cond_clockwait is available in <pthread.h>.])
4250 CXXFLAGS="$ac_save_CXXFLAGS"
4251 LIBS="$ac_save_LIBS"
4256 dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use,
4257 dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK.
4259 AC_DEFUN([GLIBCXX_CHECK_PTHREAD_MUTEX_CLOCKLOCK], [
4263 ac_save_CXXFLAGS="$CXXFLAGS"
4264 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4265 ac_save_LIBS="$LIBS"
4266 LIBS="$LIBS -lpthread"
4268 AC_CACHE_CHECK([for pthread_mutex_clocklock],
4269 glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK, [
4270 GCC_TRY_COMPILE_OR_LINK(
4271 [#include <pthread.h>],
4272 [pthread_mutex_t mutex; struct timespec ts; int n = pthread_mutex_clocklock(&mutex, CLOCK_REALTIME, &ts);],
4273 [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=yes],
4274 [glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK=no])
4276 if test $glibcxx_cv_PTHREAD_MUTEX_CLOCKLOCK = yes; then
4277 AC_DEFINE(_GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK, 1, [Define if pthread_mutex_clocklock is available in <pthread.h>.])
4280 CXXFLAGS="$ac_save_CXXFLAGS"
4281 LIBS="$ac_save_LIBS"
4286 dnl Check whether pthread_mutex_clocklock is available in <pthread.h> for std::timed_mutex to use,
4287 dnl and define _GLIBCXX_USE_PTHREAD_MUTEX_CLOCKLOCK.
4289 AC_DEFUN([GLIBCXX_CHECK_PTHREAD_RWLOCK_CLOCKLOCK], [
4293 ac_save_CXXFLAGS="$CXXFLAGS"
4294 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4295 ac_save_LIBS="$LIBS"
4296 LIBS="$LIBS -lpthread"
4298 AC_CACHE_CHECK([for pthread_rwlock_clockrdlock, pthread_wlock_clockwrlock],
4299 glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK, [
4300 GCC_TRY_COMPILE_OR_LINK(
4301 [#include <pthread.h>],
4302 [pthread_rwlock_t rwl; struct timespec ts;]
4303 [int n = pthread_rwlock_clockrdlock(&rwl, CLOCK_REALTIME, &ts);]
4304 [int m = pthread_rwlock_clockwrlock(&rwl, CLOCK_REALTIME, &ts);],
4305 [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=yes],
4306 [glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK=no])
4308 if test $glibcxx_cv_PTHREAD_RWLOCK_CLOCKLOCK = yes; then
4309 AC_DEFINE(_GLIBCXX_USE_PTHREAD_RWLOCK_CLOCKLOCK, 1, [Define if pthread_rwlock_clockrdlock and pthread_rwlock_clockwrlock are available in <pthread.h>.])
4312 CXXFLAGS="$ac_save_CXXFLAGS"
4313 LIBS="$ac_save_LIBS"
4318 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
4320 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
4324 ac_save_CXXFLAGS="$CXXFLAGS"
4325 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4327 AC_CACHE_CHECK([for hw.ncpu sysctl],
4328 glibcxx_cv_SYSCTL_HW_NCPU, [
4329 GCC_TRY_COMPILE_OR_LINK(
4332 #include <sys/sysctl.h>
4336 size_t size = sizeof(count);
4337 int mib[] = { CTL_HW, HW_NCPU };
4338 sysctl(mib, 2, &count, &size, NULL, 0);
4340 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
4341 [glibcxx_cv_SYSCTL_HW_NCPU=no])
4343 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
4344 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
4347 CXXFLAGS="$ac_save_CXXFLAGS"
4352 dnl Check to see if python pretty printing can be activated.
4354 dnl --with-python-dir=dir
4355 dnl installs directory into $prefix/dir
4356 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4358 AC_MSG_CHECKING([for custom python install directory])
4359 AC_ARG_WITH([python-dir],
4360 AS_HELP_STRING([--with-python-dir],
4361 [the location to install Python modules. This path is relative starting from the prefix.]),
4362 [with_python_dir=$withval], [with_python_dir="no"])
4363 AC_MSG_RESULT(${with_python_dir})
4365 # Needed for installing Python modules during make install.
4366 python_mod_dir="${with_python_dir}"
4367 AC_SUBST(python_mod_dir)
4368 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4372 dnl Check to see if -Werror is disabled.
4374 dnl --enable-werror/--disable-werror
4375 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4376 AC_MSG_CHECKING([for -Werror])
4377 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4378 AC_MSG_RESULT($enable_werror)
4379 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4383 dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4384 dnl and define _GLIBCXX_USE_TMPNAM.
4386 AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4390 ac_save_CXXFLAGS="$CXXFLAGS"
4391 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4393 AC_CACHE_CHECK([for tmpnam], glibcxx_cv_TMPNAM, [dnl
4394 GCC_TRY_COMPILE_OR_LINK(
4395 [#include <stdio.h>],
4396 [char *tmp = tmpnam(NULL);],
4397 [glibcxx_cv_TMPNAM=yes],
4398 [glibcxx_cv_TMPNAM=no])
4400 if test $glibcxx_cv_TMPNAM = yes; then
4401 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4404 CXXFLAGS="$ac_save_CXXFLAGS"
4409 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4410 dnl Some versions of sdt.h were not compatible with C++11.
4412 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
4413 # Note that this test has to be run with the C language.
4414 # Otherwise, sdt.h will try to include some headers from
4418 AC_CACHE_CHECK([for suitable sys/sdt.h],
4419 glibcxx_cv_sys_sdt_h, [
4420 # Because we have to run the test in C, we use grep rather
4421 # than the compiler to check for the bug. The bug is that
4422 # were strings without trailing whitespace, causing g++
4423 # to look for operator"". The pattern searches for the fixed
4425 AC_EGREP_CPP([ \",\" ], [
4426 #include <sys/sdt.h>
4427 int f() { STAP_PROBE(hi, bob); }
4428 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4431 if test $glibcxx_cv_sys_sdt_h = yes; then
4432 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4433 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4438 dnl Control whether the library should define symbols for old and new ABIs.
4439 dnl This affects definitions of strings, stringstreams and locale facets.
4441 dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
4444 dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
4446 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4447 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
4448 if test x$enable_symvers = xgnu-versioned-namespace; then
4449 # gnu-versioned-namespace is incompatible with the dual ABI.
4450 enable_libstdcxx_dual_abi="no"
4452 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4453 AC_MSG_NOTICE([dual ABI is disabled])
4454 default_libstdcxx_abi="gcc4-compatible"
4456 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
4460 dnl Check to see which ABI should be enabled by default.
4462 dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
4465 dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4467 AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4468 if test x$enable_libstdcxx_dual_abi = xyes; then
4469 AC_MSG_CHECKING([for default std::string ABI to use])
4470 AC_ARG_WITH([default-libstdcxx-abi],
4471 AS_HELP_STRING([--with-default-libstdcxx-abi],
4472 [set the std::string ABI to use by default]),
4474 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4475 new|cxx11) default_libstdcxx_abi="new" ;;
4476 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4477 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4480 [default_libstdcxx_abi="new"])
4481 AC_MSG_RESULT(${default_libstdcxx_abi})
4483 if test $default_libstdcxx_abi = "new"; then
4490 AC_SUBST(glibcxx_cxx98_abi)
4491 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4495 dnl Check to see whether to build libstdc++fs.a
4497 dnl --enable-libstdcxx-filesystem-ts
4499 AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4500 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4501 [turns on ISO/IEC TS 18822 support],
4502 [permit yes|no|auto])
4504 AC_MSG_CHECKING([whether to build Filesystem TS support])
4505 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4506 enable_libstdcxx_filesystem_ts=no
4508 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4509 case "${target_os}" in
4510 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4511 enable_libstdcxx_filesystem_ts=yes
4513 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu | uclinux*)
4514 enable_libstdcxx_filesystem_ts=yes
4517 enable_libstdcxx_filesystem_ts=yes
4520 enable_libstdcxx_filesystem_ts=yes
4523 enable_libstdcxx_filesystem_ts=yes
4526 enable_libstdcxx_filesystem_ts=no
4530 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4531 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4535 dnl Check whether the library calls required by the C++17 Filesystem library
4536 dnl and the Filesystem TS are present.
4538 dnl HAVE_STRUCT_DIRENT_D_TYPE
4539 dnl _GLIBCXX_USE_REALPATH
4540 dnl _GLIBCXX_USE_UTIMENSAT
4541 dnl _GLIBCXX_USE_ST_MTIM
4542 dnl _GLIBCXX_USE_FCHMOD
4543 dnl _GLIBCXX_USE_FCHMODAT
4544 dnl _GLIBCXX_USE_SENDFILE
4549 AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4553 ac_save_CXXFLAGS="$CXXFLAGS"
4554 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4556 AC_CACHE_CHECK([for struct dirent.d_type], glibcxx_cv_dirent_d_type, [dnl
4557 GCC_TRY_COMPILE_OR_LINK(
4558 [#include <dirent.h>],
4561 if (sizeof d.d_type) return 0;
4563 [glibcxx_cv_dirent_d_type=yes],
4564 [glibcxx_cv_dirent_d_type=no])
4566 if test $glibcxx_cv_dirent_d_type = yes; then
4567 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
4570 AC_CACHE_CHECK([for realpath], glibcxx_cv_realpath, [dnl
4571 GCC_TRY_COMPILE_OR_LINK(
4578 #if _XOPEN_VERSION < 500
4580 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4581 char *tmp = realpath((const char*)NULL, (char*)NULL);
4586 [glibcxx_cv_realpath=yes],
4587 [glibcxx_cv_realpath=no])
4589 if test $glibcxx_cv_realpath = yes; then
4590 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
4593 AC_CACHE_CHECK([for utimensat], glibcxx_cv_utimensat, [dnl
4594 GCC_TRY_COMPILE_OR_LINK(
4597 #include <sys/stat.h>
4600 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4601 int i = utimensat(AT_FDCWD, "path", ts, 0);
4603 [glibcxx_cv_utimensat=yes],
4604 [glibcxx_cv_utimensat=no])
4606 if test $glibcxx_cv_utimensat = yes; then
4607 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4610 AC_CACHE_CHECK([for utime], glibcxx_cv_utime, [dnl
4611 GCC_TRY_COMPILE_OR_LINK(
4616 struct utimbuf t = { 1, 1 };
4617 int i = utime("path", &t);
4619 [glibcxx_cv_utime=yes],
4620 [glibcxx_cv_utime=no])
4622 if test $glibcxx_cv_utime = yes; then
4623 AC_DEFINE(_GLIBCXX_USE_UTIME, 1, [Define if utime is available in <utime.h>.])
4626 AC_CACHE_CHECK([for lstat], glibcxx_cv_lstat, [dnl
4627 GCC_TRY_COMPILE_OR_LINK(
4628 [ #include <sys/stat.h> ],
4631 int i = lstat("path", &st);
4633 [glibcxx_cv_lstat=yes],
4634 [glibcxx_cv_lstat=no])
4636 if test $glibcxx_cv_lstat = yes; then
4637 AC_DEFINE(_GLIBCXX_USE_LSTAT, 1, [Define if lstat is available in <sys/stat.h>.])
4640 AC_CACHE_CHECK([for struct stat.st_mtim.tv_nsec],
4641 glibcxx_cv_st_mtim, [dnl
4642 GCC_TRY_COMPILE_OR_LINK(
4643 [ #include <sys/stat.h> ],
4646 return st.st_mtim.tv_nsec;
4648 [glibcxx_cv_st_mtim=yes],
4649 [glibcxx_cv_st_mtim=no])
4651 if test $glibcxx_cv_st_mtim = yes; then
4652 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4655 AC_CACHE_CHECK([for fchmod],
4656 glibcxx_cv_fchmod, [dnl
4657 GCC_TRY_COMPILE_OR_LINK(
4658 [#include <sys/stat.h>],
4659 [fchmod(1, S_IWUSR);],
4660 [glibcxx_cv_fchmod=yes],
4661 [glibcxx_cv_fchmod=no])
4663 if test $glibcxx_cv_fchmod = yes; then
4664 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4667 AC_CACHE_CHECK([for fchmodat],
4668 glibcxx_cv_fchmodat, [dnl
4669 GCC_TRY_COMPILE_OR_LINK(
4672 #include <sys/stat.h>
4674 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4675 [glibcxx_cv_fchmodat=yes],
4676 [glibcxx_cv_fchmodat=no])
4678 if test $glibcxx_cv_fchmodat = yes; then
4679 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4682 AC_CACHE_CHECK([for sendfile that can copy files],
4683 glibcxx_cv_sendfile, [dnl
4684 case "${target_os}" in
4685 gnu* | linux* | solaris* | uclinux*)
4686 GCC_TRY_COMPILE_OR_LINK(
4687 [#include <sys/sendfile.h>],
4688 [sendfile(1, 2, (off_t*)0, sizeof 1);],
4689 [glibcxx_cv_sendfile=yes],
4690 [glibcxx_cv_sendfile=no])
4693 glibcxx_cv_sendfile=no
4697 if test $glibcxx_cv_sendfile = yes; then
4698 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.])
4701 AC_CACHE_CHECK([for link],
4702 glibcxx_cv_link, [dnl
4703 GCC_TRY_COMPILE_OR_LINK(
4704 [#include <unistd.h>],
4706 [glibcxx_cv_link=yes],
4707 [glibcxx_cv_link=no])
4709 if test $glibcxx_cv_link = yes; then
4710 AC_DEFINE(HAVE_LINK, 1, [Define if link is available in <unistd.h>.])
4713 AC_CACHE_CHECK([for readlink],
4714 glibcxx_cv_readlink, [dnl
4715 GCC_TRY_COMPILE_OR_LINK(
4716 [#include <unistd.h>],
4717 [char buf[32]; readlink("", buf, sizeof(buf));],
4718 [glibcxx_cv_readlink=yes],
4719 [glibcxx_cv_readlink=no])
4721 if test $glibcxx_cv_readlink = yes; then
4722 AC_DEFINE(HAVE_READLINK, 1, [Define if readlink is available in <unistd.h>.])
4725 AC_CACHE_CHECK([for symlink],
4726 glibcxx_cv_symlink, [dnl
4727 GCC_TRY_COMPILE_OR_LINK(
4728 [#include <unistd.h>],
4730 [glibcxx_cv_symlink=yes],
4731 [glibcxx_cv_symlink=no])
4733 if test $glibcxx_cv_symlink = yes; then
4734 AC_DEFINE(HAVE_SYMLINK, 1, [Define if symlink is available in <unistd.h>.])
4737 AC_CACHE_CHECK([for truncate],
4738 glibcxx_cv_truncate, [dnl
4739 GCC_TRY_COMPILE_OR_LINK(
4740 [#include <unistd.h>],
4741 [truncate("", 99);],
4742 [glibcxx_cv_truncate=yes],
4743 [glibcxx_cv_truncate=no])
4745 if test $glibcxx_cv_truncate = yes; then
4746 AC_DEFINE(HAVE_TRUNCATE, 1, [Define if truncate is available in <unistd.h>.])
4749 AC_CACHE_CHECK([for fdopendir],
4750 glibcxx_cv_fdopendir, [dnl
4751 GCC_TRY_COMPILE_OR_LINK(
4752 [#include <dirent.h>],
4753 [::DIR* dir = ::fdopendir(1);],
4754 [glibcxx_cv_fdopendir=yes],
4755 [glibcxx_cv_fdopendir=no])
4757 if test $glibcxx_cv_fdopendir = yes; then
4758 AC_DEFINE(HAVE_FDOPENDIR, 1, [Define if fdopendir is available in <dirent.h>.])
4761 AC_CACHE_CHECK([for dirfd],
4762 glibcxx_cv_dirfd, [dnl
4763 GCC_TRY_COMPILE_OR_LINK(
4764 [#include <dirent.h>],
4765 [int fd = ::dirfd((::DIR*)0);],
4766 [glibcxx_cv_dirfd=yes],
4767 [glibcxx_cv_dirfd=no])
4769 if test $glibcxx_cv_dirfd = yes; then
4770 AC_DEFINE(HAVE_DIRFD, 1, [Define if dirfd is available in <dirent.h>.])
4773 AC_CACHE_CHECK([for unlinkat],
4774 glibcxx_cv_unlinkat, [dnl
4775 GCC_TRY_COMPILE_OR_LINK(
4777 #include <unistd.h>],
4778 [::unlinkat(AT_FDCWD, "", AT_REMOVEDIR);],
4779 [glibcxx_cv_unlinkat=yes],
4780 [glibcxx_cv_unlinkat=no])
4782 if test $glibcxx_cv_unlinkat = yes; then
4783 AC_DEFINE(HAVE_UNLINKAT, 1, [Define if unlinkat is available in <fcntl.h>.])
4786 CXXFLAGS="$ac_save_CXXFLAGS"
4791 dnl Check how size_t is mangled. Copied from libitm.
4793 AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [
4794 AC_CACHE_CHECK([how size_t is mangled],
4795 glibcxx_cv_size_t_mangling, [
4796 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
4797 [glibcxx_cv_size_t_mangling=m], [
4798 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
4799 [glibcxx_cv_size_t_mangling=j], [
4801 [extern __SIZE_TYPE__ x; extern unsigned long long x;],
4802 [glibcxx_cv_size_t_mangling=y], [
4804 [extern __SIZE_TYPE__ x; extern unsigned short x;],
4805 [glibcxx_cv_size_t_mangling=t], [
4807 [extern __SIZE_TYPE__ x; extern __int20 unsigned x;],
4808 [glibcxx_cv_size_t_mangling=u6uint20],
4809 [glibcxx_cv_size_t_mangling=x])
4815 if test $glibcxx_cv_size_t_mangling = x; then
4816 AC_MSG_ERROR([Unknown underlying type for size_t])
4818 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling],
4819 [Define to the letter to which size_t is mangled.])
4823 dnl Determine whether std::exception_ptr symbols should be exported with
4824 dnl the symbol versions from GCC 4.6.0 or GCC 7.1.0, depending on which
4825 dnl release first added support for std::exception_ptr. Originally it was
4826 dnl only supported for targets with always-lock-free atomics for int, but
4827 dnl since GCC 7.1 it is supported for all targets.
4829 AC_DEFUN([GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER], [
4830 if test $enable_symvers != no; then
4831 AC_MSG_CHECKING([for first version to support std::exception_ptr])
4833 aarch64-*-* | alpha-*-* | hppa*-*-* | i?86-*-* | x86_64-*-* | \
4834 m68k-*-* | powerpc*-*-* | s390*-*-* | *-*-solaris* )
4835 ac_exception_ptr_since_gcc46=yes
4838 # If the value of this macro changes then we will need to hardcode
4839 # yes/no here for additional targets based on the original value.
4840 AC_TRY_COMPILE([], [
4841 #if __GCC_ATOMIC_INT_LOCK_FREE <= 1
4842 # error atomic int not always lock free
4845 [ac_exception_ptr_since_gcc46=yes],
4846 [ac_exception_ptr_since_gcc46=no])
4849 if test x"$ac_exception_ptr_since_gcc46" = x"yes" ; then
4850 AC_DEFINE(HAVE_EXCEPTION_PTR_SINCE_GCC46, 1,
4851 [Define to 1 if GCC 4.6 supported std::exception_ptr for the target])
4852 AC_MSG_RESULT([4.6.0])
4854 AC_MSG_RESULT([7.1.0])
4860 dnl Check whether getentropy is present in <unistd.h>.
4862 AC_DEFUN([GLIBCXX_CHECK_GETENTROPY], [
4866 AC_CACHE_CHECK([for getentropy], glibcxx_cv_getentropy, [
4867 GCC_TRY_COMPILE_OR_LINK(
4868 [#include <unistd.h>],
4870 ::getentropy(&i, sizeof(i));],
4871 [glibcxx_cv_getentropy=yes], [glibcxx_cv_getentropy=no])
4874 if test $glibcxx_cv_getentropy = yes; then
4875 AC_DEFINE(HAVE_GETENTROPY, 1, [Define if getentropy is available in <unistd.h>.])
4881 dnl Check whether arc4random is present in <stdlib.h>.
4883 AC_DEFUN([GLIBCXX_CHECK_ARC4RANDOM], [
4887 AC_CACHE_CHECK([for arc4random], glibcxx_cv_arc4random, [
4888 GCC_TRY_COMPILE_OR_LINK(
4889 [#include <stdlib.h>],
4890 [unsigned i = ::arc4random();],
4891 [glibcxx_cv_arc4random=yes], [glibcxx_cv_arc4random=no])
4894 if test $glibcxx_cv_arc4random = yes; then
4895 AC_DEFINE(HAVE_ARC4RANDOM, 1, [Define if arc4random is available in <stdlib.h>.])
4901 dnl Check to see whether to build libstdc++_libbacktrace.a
4903 dnl --enable-libstdcxx-backtrace
4905 AC_DEFUN([GLIBCXX_ENABLE_BACKTRACE], [
4906 GLIBCXX_ENABLE(libstdcxx-backtrace,auto,,
4907 [turns on libbacktrace support],
4908 [permit yes|no|auto])
4910 # Most of this is adapted from libsanitizer/configure.ac
4914 # libbacktrace only needs atomics for int, which we've already tested
4915 if test "$glibcxx_cv_atomic_int" = "yes"; then
4916 BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_ATOMIC_FUNCTIONS=1"
4919 # Test for __sync support.
4920 AC_CACHE_CHECK([__sync extensions],
4921 [glibcxx_cv_sys_sync],
4922 [GCC_TRY_COMPILE_OR_LINK(
4924 [__sync_bool_compare_and_swap (&i, i, i);
4925 __sync_lock_test_and_set (&i, 1);
4926 __sync_lock_release (&i);],
4927 [glibcxx_cv_sys_sync=yes],
4928 [glibcxx_cv_sys_sync=no])
4930 if test "$glibcxx_cv_sys_sync" = "yes"; then
4931 BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_SYNC_FUNCTIONS=1"
4934 # Check for dl_iterate_phdr.
4935 AC_CHECK_HEADERS(link.h)
4936 if test "$ac_cv_header_link_h" = "no"; then
4937 have_dl_iterate_phdr=no
4939 # When built as a GCC target library, we can't do a link test.
4940 AC_EGREP_HEADER([dl_iterate_phdr], [link.h], [have_dl_iterate_phdr=yes],
4941 [have_dl_iterate_phdr=no])
4943 if test "$have_dl_iterate_phdr" = "yes"; then
4944 BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_DL_ITERATE_PHDR=1"
4947 # Check for the fcntl function.
4948 if test -n "${with_target_subdir}"; then
4950 *-*-mingw*) have_fcntl=no ;;
4951 *) have_fcntl=yes ;;
4954 AC_CHECK_FUNC(fcntl, [have_fcntl=yes], [have_fcntl=no])
4956 if test "$have_fcntl" = "yes"; then
4957 BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_FCNTL=1"
4960 AC_CHECK_DECLS(strnlen)
4962 # Check for getexecname function.
4963 if test -n "${with_target_subdir}"; then
4965 *-*-solaris2*) have_getexecname=yes ;;
4966 *) have_getexecname=no ;;
4969 AC_CHECK_FUNC(getexecname, [have_getexecname=yes], [have_getexecname=no])
4971 if test "$have_getexecname" = "yes"; then
4972 BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_GETEXECNAME=1"
4975 # The library needs to be able to read the executable itself. Compile
4976 # a file to determine the executable format. The awk script
4977 # filetype.awk prints out the file type.
4978 AC_CACHE_CHECK([output filetype],
4979 [glibcxx_cv_sys_filetype],
4982 [AC_LANG_PROGRAM([int i;], [int j;])],
4983 [filetype=`${AWK} -f $srcdir/../libbacktrace/filetype.awk conftest.$ac_objext`],
4984 [AC_MSG_FAILURE([compiler failed])])
4985 glibcxx_cv_sys_filetype=$filetype])
4987 # Match the file type to decide what files to compile.
4989 case "$glibcxx_cv_sys_filetype" in
4990 elf*) FORMAT_FILE="elf.lo" ;;
4991 *) AC_MSG_WARN([could not determine output file type])
4992 FORMAT_FILE="unknown.lo"
4993 enable_libstdcxx_backtrace=no
4996 AC_SUBST(FORMAT_FILE)
5000 case "$glibcxx_cv_sys_filetype" in
5001 elf32) elfsize=32 ;;
5002 elf64) elfsize=64 ;;
5004 BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DBACKTRACE_ELF_SIZE=$elfsize"
5007 AC_SUBST(ALLOC_FILE)
5011 AC_MSG_CHECKING([whether to build libbacktrace support])
5012 if test "$enable_libstdcxx_backtrace" == "auto"; then
5013 enable_libstdcxx_backtrace=no
5015 if test "$enable_libstdcxx_backtrace" == "yes"; then
5016 BACKTRACE_SUPPORTED=1
5017 BACKTRACE_USES_MALLOC=1
5018 if test "$ac_has_gthreads" = "yes"; then
5019 BACKTRACE_SUPPORTS_THREADS=1
5021 BACKTRACE_SUPPORTS_THREADS=0
5023 AC_SUBST(BACKTRACE_CPPFLAGS)
5024 AC_SUBST(BACKTRACE_SUPPORTED)
5025 AC_SUBST(BACKTRACE_USES_MALLOC)
5026 AC_SUBST(BACKTRACE_SUPPORTS_THREADS)
5027 AC_DEFINE(HAVE_STACKTRACE, 1, [Define if the <stacktrace> header is supported.])
5029 BACKTRACE_SUPPORTED=0
5030 BACKTRACE_USES_MALLOC=0
5031 BACKTRACE_SUPPORTS_THREADS=0
5033 AC_MSG_RESULT($enable_libstdcxx_backtrace)
5034 GLIBCXX_CONDITIONAL(ENABLE_BACKTRACE, [test "$enable_libstdcxx_backtrace" != no])
5037 # Macros from the top-level gcc directory.
5038 m4_include([../config/gc++filt.m4])
5039 m4_include([../config/tls.m4])
5040 m4_include([../config/gthr.m4])
5041 m4_include([../config/cet.m4])