3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
6 dnl end of configure. This lets tested variables be reassigned, and the
7 dnl conditional will depend on the final state of the variable. For a simple
8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
11 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
12 m4_divert_text([glibcxx_diversion],dnl
13 AM_CONDITIONAL([$1],[$2])
16 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
20 dnl Check to see what architecture and operating system we are compiling
21 dnl for. Also, if architecture- or OS-specific flags are required for
22 dnl compilation, pick them up here.
24 AC_DEFUN([GLIBCXX_CHECK_HOST], [
25 . $glibcxx_srcdir/configure.host
26 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
27 AC_MSG_NOTICE([OS config directory is $os_include_dir])
32 dnl Initialize basic configure bits.
37 AC_DEFUN([GLIBCXX_TOPREL_CONFIGURE], [
38 # Sets up multi_basedir, which is srcdir/.. plus the usual
39 # "multi_source_toprel_bottom_adjust" lunacy as needed.
40 AM_ENABLE_MULTILIB(, ..)
42 # The generated code is exactly the same, except that automake's looks in
43 # ".. $srcdir/.." and autoconf's looks in multi_basedir. Apparently other
44 # things are triggered on the presence of the two ...AUX_DIR[S], but I don't
45 # know what they are or what the other differences might be (and they keep
48 # Looking in multi_basedir seems smarter, so actually execute that branch.
50 # this is for automake
53 # this is for autoconf
54 AC_CONFIG_AUX_DIRS(${multi_basedir})
63 dnl Initialize the rest of the library configury. At this point we have
64 dnl variables like $host.
67 dnl gcc_version (x.y.z format)
70 dnl glibcxx_builddir (absolute path)
71 dnl glibcxx_srcdir (absolute path)
72 dnl toplevel_srcdir (absolute path)
75 dnl with_target_subdir
77 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
78 dnl - default settings for all AM_CONFITIONAL test variables
79 dnl - lots of tools, like CC and CXX
81 AC_DEFUN([GLIBCXX_CONFIGURE], [
82 # Keep these sync'd with the list in Makefile.am. The first provides an
83 # expandable list at autoconf time; the second provides an expandable list
84 # (i.e., shell variable) at configure time.
85 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
86 SUBDIRS='glibcxx_SUBDIRS'
88 # These need to be absolute paths, yet at the same time need to
89 # canonicalize only relative paths, because then amd will not unmount
90 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
91 glibcxx_builddir=`${PWDCMD-pwd}`
93 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
94 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
96 toplevel_srcdir=${glibcxx_srcdir}/..
97 AC_SUBST(glibcxx_builddir)
98 AC_SUBST(glibcxx_srcdir)
99 AC_SUBST(toplevel_srcdir)
101 # We use these options to decide which functions to include. They are
102 # set from the top level.
103 AC_ARG_WITH([target-subdir],
104 AC_HELP_STRING([--with-target-subdir=SUBDIR],
105 [configuring in a subdirectory]))
107 AC_ARG_WITH([cross-host],
108 AC_HELP_STRING([--with-cross-host=HOST],
109 [configuring with a cross compiler]))
111 AC_ARG_WITH([newlib],
112 AC_HELP_STRING([--with-newlib],
113 [assume newlib as a system C library]))
115 # We're almost certainly being configured before anything else which uses
116 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
117 # we not cache the value of CXX that we "discover" here, because it's set
118 # to something unique for us and libjava. Other target libraries need to
119 # find CXX for themselves. We yank the rug out from under the normal AC_*
120 # process by sneakily renaming the cache variable. This also lets us debug
121 # the value of "our" CXX in postmortems.
123 # We must also force CXX to /not/ be a precious variable, otherwise the
124 # wrong (non-multilib-adjusted) value will be used in multilibs. This
125 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
126 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
127 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
129 # -fno-builtin must be present here so that a non-conflicting form of
130 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
132 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
133 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
134 m4_define([_AC_ARG_VAR_PRECIOUS],[])
135 save_CXXFLAGS="$CXXFLAGS"
136 CXXFLAGS="$CXXFLAGS -fno-builtin"
139 CXXFLAGS="$save_CXXFLAGS"
140 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
144 # For directory versioning (e.g., headers) and other variables.
145 AC_MSG_CHECKING([for GCC version number])
146 gcc_version=`$CXX -dumpversion`
147 AC_MSG_RESULT($gcc_version)
149 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
150 # available). Uncomment the next line to force a particular method.
154 AC_CHECK_TOOL(AS, as)
155 AC_CHECK_TOOL(AR, ar)
156 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
160 # Set up safe default values for all subsequent AM_CONDITIONAL tests
161 # which are themselves conditionally expanded.
162 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
163 ## other macros from doing the same. This should be automated.) -pme
166 #enable_libstdcxx_debug=no
167 #enable_libstdcxx_pch=no
172 #enable_hosted_libstdcxx=yes
174 # Find platform-specific directories containing configuration info.
175 # Also possibly modify flags used elsewhere, as needed by the platform.
180 m4_include([linkage.m4])
181 m4_include([../config/no-executables.m4])
185 dnl Tests for newer compiler features, or features that are present in newer
186 dnl compiler versions but not older compiler versions still in use, should
190 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
191 dnl new inlining code or the new system_header pragma will die on -Werror.
192 dnl Leave it out by default and use maint-mode to use it.
193 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
194 dnl compiler supports it and the user has not requested debug mode.
196 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
197 # All these tests are for C++; save the language and the compiler flags.
198 # The CXXFLAGS thing is suspicious, but based on similar bits previously
199 # found in GLIBCXX_CONFIGURE.
202 ac_test_CXXFLAGS="${CXXFLAGS+set}"
203 ac_save_CXXFLAGS="$CXXFLAGS"
205 # Check for maintainer-mode bits.
206 if test x"$USE_MAINTAINER_MODE" = xno; then
212 # Check for -ffunction-sections -fdata-sections
213 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
214 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
215 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
216 if test "$ac_test_CXXFLAGS" = set; then
217 CXXFLAGS="$ac_save_CXXFLAGS"
219 # this is the suspicious part
222 if test x"$ac_fdsections" = x"yes"; then
223 SECTION_FLAGS='-ffunction-sections -fdata-sections'
225 AC_MSG_RESULT($ac_fdsections)
229 AC_SUBST(SECTION_FLAGS)
234 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
235 dnl the native linker is in use, all variables will be defined to something
236 dnl safe (like an empty string).
239 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
240 dnl OPT_LDFLAGS='-Wl,-O1' if possible
241 dnl LD (as a side effect of testing)
244 dnl glibcxx_gnu_ld_version (possibly)
246 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
247 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
249 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
250 # If we're not using GNU ld, then there's no point in even trying these
251 # tests. Check for that first. We should have already tested for gld
252 # by now (in libtool), but require it now just to be safe...
253 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
254 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
255 AC_REQUIRE([AC_PROG_LD])
256 AC_REQUIRE([AC_PROG_AWK])
258 # The name set by libtool depends on the version of libtool. Shame on us
259 # for depending on an impl detail, but c'est la vie. Older versions used
260 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
261 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
262 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
263 # set (hence we're using an older libtool), then set it.
264 if test x${with_gnu_ld+set} != xset; then
265 if test x${ac_cv_prog_gnu_ld+set} != xset; then
266 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
269 with_gnu_ld=$ac_cv_prog_gnu_ld
273 # Start by getting the version number. I think the libtool test already
274 # does some of this, but throws away the result.
276 ldver=`$LD --version 2>/dev/null | head -1 | \
277 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
279 glibcxx_gnu_ld_version=`echo $ldver | \
280 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
283 if test "$with_gnu_ld" = "notbroken"; then
284 # GNU ld it is! Joy and bunny rabbits!
286 # All these tests are for C++; save the language and the compiler flags.
287 # Need to do this so that g++ won't try to link in libstdc++
288 ac_test_CFLAGS="${CFLAGS+set}"
289 ac_save_CFLAGS="$CFLAGS"
290 CFLAGS='-x c++ -Wl,--gc-sections'
292 # Check for -Wl,--gc-sections
293 # XXX This test is broken at the moment, as symbols required for linking
294 # are now in libsupc++ (not built yet). In addition, this test has
295 # cored on solaris in the past. In addition, --gc-sections doesn't
296 # really work at the moment (keeps on discarding used sections, first
297 # .eh_frame and now some of the glibc sections for iconv).
298 # Bzzzzt. Thanks for playing, maybe next time.
299 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
307 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
308 if test "$ac_test_CFLAGS" = set; then
309 CFLAGS="$ac_save_CFLAGS"
311 # this is the suspicious part
314 if test "$ac_sectionLDflags" = "yes"; then
315 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
317 AC_MSG_RESULT($ac_sectionLDflags)
320 # Set linker optimization flags.
321 if test x"$with_gnu_ld" = x"yes"; then
322 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
325 AC_SUBST(SECTION_LDFLAGS)
326 AC_SUBST(OPT_LDFLAGS)
331 dnl Check to see if this target can enable the wchar_t parts.
332 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
333 dnl must have been previously checked.) By default, wide characters are
337 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
338 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
340 AC_DEFUN([GLIBCXX_CHECK_WCHAR_T_SUPPORT], [
341 # Test wchar.h for mbstate_t, which is needed for char_traits and
342 # others even if wchar_t support is not on.
343 AC_MSG_CHECKING([for mbstate_t])
344 AC_TRY_COMPILE([#include <wchar.h>],
345 [mbstate_t teststate;],
346 have_mbstate_t=yes, have_mbstate_t=no)
347 AC_MSG_RESULT($have_mbstate_t)
348 if test x"$have_mbstate_t" = xyes; then
349 AC_DEFINE(HAVE_MBSTATE_T)
352 # Sanity check for existence of ISO C99 headers for extended encoding.
353 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
354 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
356 # Only continue checking if the ISO C99 headers exist and support is on.
357 if test x"$ac_has_wchar_h" = xyes &&
358 test x"$ac_has_wctype_h" = xyes &&
359 test x"$enable_c_mbchar" != xno; then
361 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
362 # numeric_limits can instantiate type_traits<wchar_t>
363 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
364 AC_TRY_COMPILE([#include <wchar.h>],
365 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
366 has_wchar_minmax=yes, has_wchar_minmax=no)
367 AC_MSG_RESULT($has_wchar_minmax)
369 # Test wchar.h for WEOF, which is what we use to determine whether
370 # to specialize for char_traits<wchar_t> or not.
371 AC_MSG_CHECKING([for WEOF])
374 #include <stddef.h>],
376 has_weof=yes, has_weof=no)
377 AC_MSG_RESULT($has_weof)
379 # Tests for wide character functions used in char_traits<wchar_t>.
381 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset],
384 # Checks for names injected into std:: by the c_std headers.
385 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \
386 fwprintf fwscanf swprintf swscanf vfwprintf vswprintf \
387 vwprintf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
388 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstol \
389 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
390 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
393 # Checks for wide character functions that are not required
394 # for basic wchar_t support. Don't disable support if they are missing.
395 # Injection of these is wrapped with guard macros.
396 AC_CHECK_FUNCS([vfwscanf vswscanf vwscanf wcstof iswblank],[],[])
398 AC_MSG_CHECKING([for ISO C99 wchar_t support])
399 if test x"$has_weof" = xyes &&
400 test x"$has_wchar_minmax" = xyes &&
401 test x"$ac_wfuncs" = xyes;
403 ac_isoC99_wchar_t=yes
407 AC_MSG_RESULT($ac_isoC99_wchar_t)
409 # Use iconv for wchar_t to char conversions. As such, check for
410 # X/Open Portability Guide, version 2 features (XPG2).
411 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
412 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
414 # Check for existence of libiconv.a providing XPG2 wchar_t support.
415 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
417 LIBS="$LIBS $libiconv"
419 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
420 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
424 AC_MSG_CHECKING([for XPG2 wchar_t support])
425 if test x"$ac_has_iconv_h" = xyes &&
426 test x"$ac_has_langinfo_h" = xyes &&
427 test x"$ac_XPG2funcs" = xyes;
433 AC_MSG_RESULT($ac_XPG2_wchar_t)
435 # At the moment, only enable wchar_t specializations if all the
436 # above support is present.
437 if test x"$ac_isoC99_wchar_t" = xyes &&
438 test x"$ac_XPG2_wchar_t" = xyes;
440 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
444 AC_MSG_CHECKING([for enabled wchar_t specializations])
445 AC_MSG_RESULT($enable_wchar_t)
450 dnl Check for headers for, and arguments to, the setrlimit() function.
451 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
454 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
455 dnl various HAVE_LIMIT_* for individual limit names
457 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
460 #include <sys/time.h>
461 #include <sys/resource.h>
463 [ int f = RLIMIT_$1 ; ],
464 [glibcxx_mresult=1], [glibcxx_mresult=0])
465 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
466 [Only used in build directory testsuite_hooks.h.])
469 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
470 setrlimit_have_headers=yes
471 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
473 [setrlimit_have_headers=no])
474 # If don't have the headers, then we can't run the tests now, and we
475 # won't be seeing any of these during testsuite compilation.
476 if test $setrlimit_have_headers = yes; then
477 # Can't do these in a loop, else the resulting syntax is wrong.
478 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
479 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
480 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
481 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
482 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
484 # Check for rlimit, setrlimit.
485 AC_CACHE_VAL(ac_setrlimit, [
488 #include <sys/time.h>
489 #include <sys/resource.h>
493 [ac_setrlimit=yes], [ac_setrlimit=no])
497 AC_MSG_CHECKING([for testsuite resource limits support])
498 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
500 AC_DEFINE(_GLIBCXX_RES_LIMITS)
504 AC_MSG_RESULT($ac_res_limits)
509 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
510 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
512 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
513 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
515 [#include <sys/stat.h>],
518 S_ISREG(buffer.st_mode);],
519 [glibcxx_cv_S_ISREG=yes],
520 [glibcxx_cv_S_ISREG=no])
522 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
524 [#include <sys/stat.h>],
527 S_IFREG & buffer.st_mode;],
528 [glibcxx_cv_S_IFREG=yes],
529 [glibcxx_cv_S_IFREG=no])
531 if test $glibcxx_cv_S_ISREG = yes; then
532 AC_DEFINE(HAVE_S_ISREG)
533 elif test $glibcxx_cv_S_IFREG = yes; then
534 AC_DEFINE(HAVE_S_IFREG)
540 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
542 AC_DEFUN([GLIBCXX_CHECK_POLL], [
543 AC_CACHE_VAL(glibcxx_cv_POLL, [
546 [struct pollfd pfd[1];
547 pfd[0].events = POLLIN;
549 [glibcxx_cv_POLL=yes],
550 [glibcxx_cv_POLL=no])
552 if test $glibcxx_cv_POLL = yes; then
559 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
561 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
562 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
564 [#include <sys/uio.h>],
565 [struct iovec iov[2];
567 [glibcxx_cv_WRITEV=yes],
568 [glibcxx_cv_WRITEV=no])
570 if test $glibcxx_cv_WRITEV = yes; then
571 AC_DEFINE(HAVE_WRITEV)
577 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
579 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
580 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
582 [#include <stdint.h>],
584 [glibcxx_cv_INT64_T=yes],
585 [glibcxx_cv_INT64_T=no])
587 if test $glibcxx_cv_INT64_T = yes; then
588 AC_DEFINE(HAVE_INT64_T)
594 dnl Check whether LFS support is available.
596 AC_DEFUN([GLIBCXX_CHECK_LFS], [
599 ac_save_CXXFLAGS="$CXXFLAGS"
600 CXXFLAGS="$CXXFLAGS -fno-exceptions"
601 AC_CACHE_VAL(glibcxx_cv_LFS, [
608 fseeko64(fp, 0, SEEK_CUR);
610 lseek64(1, 0, SEEK_CUR);],
611 [glibcxx_cv_LFS=yes],
614 if test $glibcxx_cv_LFS = yes; then
615 AC_DEFINE(_GLIBCXX_USE_LFS)
617 CXXFLAGS="$ac_save_CXXFLAGS"
623 dnl Check for whether a fully dynamic basic_string implementation should
624 dnl be turned on, that does not put empty objects in per-process static
625 dnl memory (mostly useful together with shared memory allocators, see PR
626 dnl libstdc++/16612 for details).
628 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
629 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
630 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
631 dnl Where DEFAULT is either `yes' or `no'.
633 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
634 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
635 if test $enable_fully_dynamic_string = yes; then
636 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING)
642 dnl Does any necessary configuration of the testsuite directory. Generates
643 dnl the testsuite_hooks.h header.
645 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
648 dnl enable_abi_check / GLIBCXX_TEST_ABI
652 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
653 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
654 # Do checks for resource limit functions.
655 GLIBCXX_CHECK_SETRLIMIT
657 # Look for setenv, so that extended locale tests can be performed.
658 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
660 if test $enable_symvers = no; then
665 enable_abi_check=no ;;
667 enable_abi_check=yes ;;
671 # Only build this as native, since automake does not understand
676 # Export file names for ABI checking.
677 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
678 AC_SUBST(baseline_dir)
680 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
681 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
686 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
690 dnl TOPLEVEL_INCLUDES
692 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
693 # Used for every C++ compile we perform.
695 -I$glibcxx_builddir/include/$host_alias \
696 -I$glibcxx_builddir/include \
697 -I$glibcxx_srcdir/libsupc++"
699 # For Canadian crosses, pick this up too.
700 if test $CANADIAN = yes; then
701 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
704 # Stuff in the actual top level. Currently only used by libsupc++ to
705 # get unwind* headers from the gcc dir.
706 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
707 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
709 # Now, export this to all the little Makefiles....
710 AC_SUBST(GLIBCXX_INCLUDES)
711 AC_SUBST(TOPLEVEL_INCLUDES)
716 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
717 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
720 dnl OPTIMIZE_CXXFLAGS
723 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
724 # Optimization flags that are probably a good idea for thrill-seekers. Just
725 # uncomment the lines below and make, everything else is ready to go...
726 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
728 AC_SUBST(OPTIMIZE_CXXFLAGS)
730 WARN_FLAGS='-Wall -W -Wwrite-strings -Wcast-qual'
736 dnl All installation directory information is determined here.
740 dnl glibcxx_prefixdir
741 dnl glibcxx_toolexecdir
742 dnl glibcxx_toolexeclibdir
744 dnl Assumes cross_compiling bits already done, and with_cross_host in
747 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
748 glibcxx_toolexecdir=no
749 glibcxx_toolexeclibdir=no
750 glibcxx_prefixdir=$prefix
752 AC_MSG_CHECKING([for gxx-include-dir])
753 AC_ARG_WITH([gxx-include-dir],
754 AC_HELP_STRING([--with-gxx-include-dir=DIR],
755 [installation directory for include files]),
757 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
758 no) gxx_include_dir=no ;;
759 *) gxx_include_dir=$withval ;;
761 [gxx_include_dir=no])
762 AC_MSG_RESULT($gxx_include_dir)
764 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
765 AC_ARG_ENABLE([version-specific-runtime-libs],
766 AC_HELP_STRING([--enable-version-specific-runtime-libs],
767 [Specify that runtime libraries should be installed in a compiler-specific directory]),
768 [case "$enableval" in
769 yes) version_specific_libs=yes ;;
770 no) version_specific_libs=no ;;
771 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
773 [version_specific_libs=no])
774 AC_MSG_RESULT($version_specific_libs)
776 # Default case for install directory for include files.
777 if test $version_specific_libs = no && test $gxx_include_dir = no; then
778 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
781 # Version-specific runtime libs processing.
782 if test $version_specific_libs = yes; then
783 # Need the gcc compiler version to know where to install libraries
784 # and header files if --enable-version-specific-runtime-libs option
785 # is selected. FIXME: these variables are misnamed, there are
786 # no executables installed in _toolexecdir or _toolexeclibdir.
787 if test x"$gxx_include_dir" = x"no"; then
788 gxx_include_dir='${libdir}/gcc/${host_alias}/'$gcc_version/include/c++
790 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
791 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
794 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
795 # Install a library built with a cross compiler in tooldir, not libdir.
796 if test x"$glibcxx_toolexecdir" = x"no"; then
797 if test -n "$with_cross_host" &&
798 test x"$with_cross_host" != x"no"; then
799 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
800 glibcxx_toolexeclibdir='${toolexecdir}/lib'
802 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
803 glibcxx_toolexeclibdir='${libdir}'
805 multi_os_directory=`$CXX -print-multi-os-directory`
806 case $multi_os_directory in
807 .) ;; # Avoid trailing /.
808 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
812 AC_MSG_CHECKING([for install location])
813 AC_MSG_RESULT($gxx_include_dir)
815 AC_SUBST(glibcxx_prefixdir)
816 AC_SUBST(gxx_include_dir)
817 AC_SUBST(glibcxx_toolexecdir)
818 AC_SUBST(glibcxx_toolexeclibdir)
824 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
825 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
826 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
828 dnl See docs/html/17_intro/configury.html#enable for documentation.
830 m4_define([GLIBCXX_ENABLE],[dnl
831 m4_define([_g_switch],[--enable-$1])dnl
832 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
833 AC_ARG_ENABLE($1,_g_help,
838 m4_bpatsubst([$5],[permit ])) ;;
839 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
840 dnl Idea for future: generate a URL pointing to
841 dnl "onlinedocs/configopts.html#whatever"
848 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
852 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
853 m4_undefine([_g_switch])dnl
854 m4_undefine([_g_help])dnl
859 dnl Check for ISO/IEC 9899:1999 "C99" support.
861 dnl --enable-c99 defines _GLIBCXX_USE_C99
862 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
863 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
864 dnl Where DEFAULT is either `yes' or `no'.
865 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
867 AC_DEFUN([GLIBCXX_ENABLE_C99], [
868 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
873 # Check for the existence of <math.h> functions used if C99 is enabled.
875 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
876 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
877 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
878 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
879 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
880 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
881 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
882 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
883 AC_TRY_COMPILE([#include <math.h>],
884 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
885 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
886 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
887 AC_TRY_COMPILE([#include <math.h>],
888 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
889 AC_TRY_COMPILE([#include <math.h>],
890 [isunordered(0.0,0.0);],, [ac_c99_math=no])
891 AC_MSG_RESULT($ac_c99_math)
893 if test x"$ac_c99_math" = x"yes"; then
894 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
897 # Check for the existence in <stdio.h> of vscanf, et. al.
899 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
900 AC_TRY_COMPILE([#include <stdio.h>],
901 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
902 AC_TRY_COMPILE([#include <stdio.h>
904 void foo(char* fmt, ...)
905 {va_list args; va_start(args, fmt);
906 vfscanf(stderr, "%i", args);}],
907 [],, [ac_c99_stdio=no])
908 AC_TRY_COMPILE([#include <stdio.h>
910 void foo(char* fmt, ...)
911 {va_list args; va_start(args, fmt);
912 vscanf("%i", args);}],
913 [],, [ac_c99_stdio=no])
914 AC_TRY_COMPILE([#include <stdio.h>
916 void foo(char* fmt, ...)
917 {va_list args; va_start(args, fmt);
918 vsnprintf(fmt, 0, "%i", args);}],
919 [],, [ac_c99_stdio=no])
920 AC_TRY_COMPILE([#include <stdio.h>
922 void foo(char* fmt, ...)
923 {va_list args; va_start(args, fmt);
924 vsscanf(fmt, "%i", args);}],
925 [],, [ac_c99_stdio=no])
926 AC_MSG_RESULT($ac_c99_stdio)
928 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
930 AC_MSG_CHECKING([for lldiv_t declaration])
931 AC_CACHE_VAL(ac_c99_lldiv_t, [
932 AC_TRY_COMPILE([#include <stdlib.h>],
934 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
936 AC_MSG_RESULT($ac_c99_lldiv_t)
938 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
939 AC_TRY_COMPILE([#include <stdlib.h>],
940 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
941 AC_TRY_COMPILE([#include <stdlib.h>],
942 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
943 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
944 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
945 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
946 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
947 if test x"$ac_c99_lldiv_t" = x"no"; then
950 AC_MSG_RESULT($ac_c99_stdlib)
952 # Check for the existence of <wchar.h> functions used if C99 is enabled.
953 # XXX the wchar.h checks should be rolled into the general C99 bits.
955 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
956 AC_TRY_COMPILE([#include <wchar.h>],
957 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
958 AC_TRY_COMPILE([#include <wchar.h>],
959 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
960 AC_TRY_COMPILE([#include <wchar.h>],
961 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
962 AC_MSG_RESULT($ac_c99_wchar)
964 AC_MSG_CHECKING([for enabled ISO C99 support])
965 if test x"$ac_c99_math" = x"no" ||
966 test x"$ac_c99_stdio" = x"no" ||
967 test x"$ac_c99_stdlib" = x"no" ||
968 test x"$ac_c99_wchar" = x"no"; then
971 AC_MSG_RESULT($enable_c99)
973 if test x"$ac_99_math" = x"yes"; then
974 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
977 # Option parsed, now set things appropriately
978 if test x"$enable_c99" = x"yes"; then
979 AC_DEFINE(_GLIBCXX_USE_C99)
987 dnl Check for what type of C headers to use.
989 dnl --enable-cheaders= [does stuff].
990 dnl --disable-cheaders [does not do anything, really].
991 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
992 dnl Where DEFAULT is either `c' or `c_std'.
994 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
995 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
996 [construct "C" headers for g++], [permit c|c_std])
997 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
999 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1001 AC_SUBST(C_INCLUDE_DIR)
1002 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1003 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1004 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1009 dnl Check for which locale library to use. The choice is mapped to
1010 dnl a subdirectory of config/locale.
1012 dnl Default is generic.
1014 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1015 AC_MSG_CHECKING([for C locale to use])
1016 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1017 [use MODEL for target locale package],
1018 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1020 # If they didn't use this option switch, or if they specified --enable
1021 # with no specific model, we'll have to look for one. If they
1022 # specified --disable (???), do likewise.
1023 if test $enable_clocale = no || test $enable_clocale = yes; then
1027 # Either a known package, or "auto"
1028 enable_clocale_flag=$enable_clocale
1030 # Probe for locale support if no specific model is specified.
1031 # Default to "generic".
1032 if test $enable_clocale_flag = auto; then
1033 case x${target_os} in
1034 xlinux* | xgnu* | xkfreebsd*-gnu | xknetbsd*-gnu)
1035 AC_EGREP_CPP([_GLIBCXX_ok], [
1036 #include <features.h>
1037 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1040 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1042 # Test for bugs early in glibc-2.2.x series
1043 if test x$enable_clocale_flag = xgnu; then
1045 #define _GNU_SOURCE 1
1048 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1049 extern __typeof(newlocale) __newlocale;
1050 extern __typeof(duplocale) __duplocale;
1051 extern __typeof(strcoll_l) __strcoll_l;
1055 const char __one[] = "Äuglein Augmen";
1056 const char __two[] = "Äuglein";
1061 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1062 loc_dup = __duplocale(loc);
1063 i = __strcoll_l(__one, __two, loc);
1064 j = __strcoll_l(__one, __two, loc_dup);
1068 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1069 [enable_clocale_flag=generic])
1072 # ... at some point put __strxfrm_l tests in as well.
1075 enable_clocale_flag=generic
1080 # Deal with gettext issues. Default to not using it (=no) until we detect
1081 # support for it later. Let the user turn it off via --e/d, but let that
1082 # default to on for easier handling.
1085 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1089 # Set configure bits for specified locale package
1090 case ${enable_clocale_flag} in
1092 AC_MSG_RESULT(generic)
1094 CLOCALE_H=config/locale/generic/c_locale.h
1095 CLOCALE_CC=config/locale/generic/c_locale.cc
1096 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1097 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1098 CCOLLATE_CC=config/locale/generic/collate_members.cc
1099 CCTYPE_CC=config/locale/generic/ctype_members.cc
1100 CMESSAGES_H=config/locale/generic/messages_members.h
1101 CMESSAGES_CC=config/locale/generic/messages_members.cc
1102 CMONEY_CC=config/locale/generic/monetary_members.cc
1103 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1104 CTIME_H=config/locale/generic/time_members.h
1105 CTIME_CC=config/locale/generic/time_members.cc
1106 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1111 # Declare intention to use gettext, and add support for specific
1113 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1116 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1117 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1118 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1121 # Export the build objects.
1122 for ling in $ALL_LINGUAS; do \
1123 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1124 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1126 AC_SUBST(glibcxx_MOFILES)
1127 AC_SUBST(glibcxx_POFILES)
1129 CLOCALE_H=config/locale/gnu/c_locale.h
1130 CLOCALE_CC=config/locale/gnu/c_locale.cc
1131 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1132 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1133 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1134 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1135 CMESSAGES_H=config/locale/gnu/messages_members.h
1136 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1137 CMONEY_CC=config/locale/gnu/monetary_members.cc
1138 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1139 CTIME_H=config/locale/gnu/time_members.h
1140 CTIME_CC=config/locale/gnu/time_members.cc
1141 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1144 AC_MSG_RESULT(IEEE 1003.1)
1146 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1147 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1148 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1149 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1150 CCOLLATE_CC=config/locale/generic/collate_members.cc
1151 CCTYPE_CC=config/locale/generic/ctype_members.cc
1152 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1153 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1154 CMONEY_CC=config/locale/generic/monetary_members.cc
1155 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1156 CTIME_H=config/locale/generic/time_members.h
1157 CTIME_CC=config/locale/generic/time_members.cc
1158 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1162 # This is where the testsuite looks for locale catalogs, using the
1163 # -DLOCALEDIR define during testsuite compilation.
1164 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1165 AC_SUBST(glibcxx_localedir)
1167 # A standalone libintl (e.g., GNU libintl) may be in use.
1168 if test $USE_NLS = yes; then
1169 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1170 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1172 if test $USE_NLS = yes; then
1173 AC_DEFINE(_GLIBCXX_USE_NLS)
1178 AC_SUBST(CCODECVT_H)
1179 AC_SUBST(CMESSAGES_H)
1180 AC_SUBST(CCODECVT_CC)
1181 AC_SUBST(CCOLLATE_CC)
1183 AC_SUBST(CMESSAGES_CC)
1185 AC_SUBST(CNUMERIC_CC)
1188 AC_SUBST(CLOCALE_CC)
1189 AC_SUBST(CLOCALE_INTERNAL_H)
1194 dnl Check for which std::allocator base class to use. The choice is
1195 dnl mapped from a subdirectory of include/ext.
1199 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1200 AC_MSG_CHECKING([for std::allocator base class to use])
1201 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1202 [use KIND for target std::allocator base],
1203 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1204 # If they didn't use this option switch, or if they specified --enable
1205 # with no specific model, we'll have to look for one. If they
1206 # specified --disable (???), do likewise.
1207 if test $enable_libstdcxx_allocator = no || test $enable_libstdcxx_allocator = yes; then
1208 enable_libstdcxx_allocator=auto
1211 # Either a known package, or "auto"
1212 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1214 # Probe for host-specific support if no specific model is specified.
1216 if test $enable_libstdcxx_allocator_flag = auto; then
1217 case ${target_os} in
1219 enable_libstdcxx_allocator_flag=new
1223 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1226 # Set configure bits for specified locale package
1227 case ${enable_libstdcxx_allocator_flag} in
1229 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1230 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1233 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1234 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1237 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1238 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1241 ALLOCATOR_H=config/allocator/new_allocator_base.h
1242 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1245 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1246 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1250 AC_SUBST(ALLOCATOR_H)
1251 AC_SUBST(ALLOCATOR_NAME)
1256 dnl Check for whether the Boost-derived checks should be turned on.
1258 dnl --enable-concept-checks turns them on.
1259 dnl --disable-concept-checks leaves them off.
1260 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1261 dnl Where DEFAULT is either `yes' or `no'.
1263 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1264 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1265 if test $enable_concept_checks = yes; then
1266 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1272 dnl Check for which I/O library to use: stdio, or something specific.
1274 dnl Default is stdio.
1276 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1277 AC_MSG_CHECKING([for underlying I/O to use])
1278 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1279 [use target-specific I/O package], [permit stdio])
1281 # Now that libio has been removed, you can have any color you want as long
1282 # as it's black. This is one big no-op until other packages are added, but
1283 # showing the framework never hurts.
1284 case ${enable_cstdio} in
1286 CSTDIO_H=config/io/c_io_stdio.h
1287 BASIC_FILE_H=config/io/basic_file_stdio.h
1288 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1289 AC_MSG_RESULT(stdio)
1294 AC_SUBST(BASIC_FILE_H)
1295 AC_SUBST(BASIC_FILE_CC)
1300 dnl Check for "unusual" flags to pass to the compiler while building.
1302 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1303 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1304 dnl --disable-cxx-flags passes nothing.
1305 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1306 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1307 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1308 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1309 dnl If "default flags" is an empty string, the effect is the same
1310 dnl as --disable or --enable=no.
1312 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1313 AC_MSG_CHECKING([for extra compiler flags for building])
1314 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1315 [pass compiler FLAGS when building library],
1316 [case "x$enable_cxx_flags" in
1317 xno | x) enable_cxx_flags= ;;
1319 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1322 # Run through flags (either default or command-line) and set anything
1323 # extra (e.g., #defines) that must accompany particular g++ options.
1324 if test -n "$enable_cxx_flags"; then
1325 for f in $enable_cxx_flags; do
1329 *) # and we're trying to pass /what/ exactly?
1330 AC_MSG_ERROR([compiler flags start with a -]) ;;
1335 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1336 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1337 AC_SUBST(EXTRA_CXX_FLAGS)
1342 dnl Check for wide character support. Has the same effect as the option
1343 dnl in gcc's configure, but in a form that autoconf can mess with.
1345 dnl --enable-c-mbchar requests all the wchar_t stuff.
1346 dnl --disable-c-mbchar doesn't.
1347 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1348 dnl Where DEFAULT is either `yes' or `no'.
1350 AC_DEFUN([GLIBCXX_ENABLE_C_MBCHAR], [
1351 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1352 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1357 dnl Check to see if debugging libraries are to be built.
1359 dnl --enable-libstdcxx-debug
1360 dnl builds a separate set of debugging libraries in addition to the
1361 dnl normal (shared, static) libstdc++ binaries.
1363 dnl --disable-libstdcxx-debug
1364 dnl builds only one (non-debug) version of libstdc++.
1366 dnl --enable-libstdcxx-debug-flags=FLAGS
1367 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1369 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1370 dnl Where DEFAULT is either `yes' or `no'.
1372 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1373 AC_MSG_CHECKING([for additional debug build])
1374 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1375 AC_MSG_RESULT($enable_libstdcxx_debug)
1376 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1381 dnl Check for explicit debug flags.
1383 dnl --enable-libstdcxx-debug-flags='-O1'
1384 dnl is a general method for passing flags to be used when
1385 dnl building debug libraries with --enable-debug.
1387 dnl --disable-libstdcxx-debug-flags does nothing.
1388 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1389 dnl If "default flags" is an empty string, the effect is the same
1390 dnl as --disable or --enable=no.
1392 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1393 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1394 [pass compiler FLAGS when building debug library],
1395 [case "x$enable_libstdcxx_debug_flags" in
1396 xno | x) enable_libstdcxx_debug_flags= ;;
1398 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1401 # Option parsed, now set things appropriately
1402 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1403 AC_SUBST(DEBUG_FLAGS)
1405 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1410 dnl Check if the user only wants a freestanding library implementation.
1412 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1413 dnl installing only the headers required by [17.4.1.3] and the language
1414 dnl support library. More than that will be built (to keep the Makefiles
1415 dnl conveniently clean), but not installed.
1418 dnl is_hosted (yes/no)
1421 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1423 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1424 AC_ARG_ENABLE([hosted-libstdcxx],
1425 AC_HELP_STRING([--disable-hosted-libstdcxx],
1426 [only build freestanding C++ runtime support]),,
1427 [enable_hosted_libstdcxx=yes])
1428 if test "$enable_hosted_libstdcxx" = no; then
1429 AC_MSG_NOTICE([Only freestanding libraries will be built])
1433 enable_libstdcxx_pch=no
1438 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1439 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1440 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1445 dnl Check for template specializations for the 'long long' type extension.
1446 dnl The result determines only whether 'long long' I/O is enabled; things
1447 dnl like numeric_limits<> specializations are always available.
1449 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1450 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1451 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1452 dnl Where DEFAULT is either `yes' or `no'.
1454 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1455 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1456 if test $enable_long_long = yes; then
1457 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1463 dnl Check to see if building and using a C++ precompiled header can be done.
1465 dnl --enable-libstdcxx-pch=yes
1466 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1467 dnl may work, after some light-hearted attempts to puzzle out compiler
1468 dnl support, flip bits on in include/Makefile.am
1470 dnl --disable-libstdcxx-pch
1471 dnl turns off attempts to use or build stdc++.h.gch.
1474 dnl glibcxx_PCHFLAGS
1476 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1477 AC_MSG_CHECKING([for enabled PCH])
1478 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1479 AC_MSG_RESULT([$enable_libstdcxx_pch])
1481 if test $enable_libstdcxx_pch = yes; then
1482 AC_CACHE_CHECK([for compiler with PCH support],
1483 [glibcxx_cv_prog_CXX_pch],
1484 [ac_save_CXXFLAGS="$CXXFLAGS"
1485 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1488 echo '#include <math.h>' > conftest.h
1489 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1490 -o conftest.h.gch 1>&5 2>&1 &&
1491 echo '#error "pch failed"' > conftest.h &&
1492 echo '#include "conftest.h"' > conftest.cc &&
1493 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1495 glibcxx_cv_prog_CXX_pch=yes
1497 glibcxx_cv_prog_CXX_pch=no
1500 CXXFLAGS=$ac_save_CXXFLAGS
1503 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1506 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1507 if test $enable_libstdcxx_pch = yes; then
1508 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1512 AC_SUBST(glibcxx_PCHFLAGS)
1517 dnl Check for exception handling support. If an explicit enable/disable
1518 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1519 dnl target may or may not support call frame exceptions.
1521 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1522 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1523 dnl Neither one forces an attempt at detection.
1526 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1528 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1529 AC_MSG_CHECKING([for exception model to use])
1532 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1533 [force use of builtin_setjmp for exceptions],
1534 [permit yes|no|auto])
1536 if test $enable_sjlj_exceptions = auto; then
1537 # Botheration. Now we've got to detect the exception model. Link tests
1538 # against libgcc.a are problematic since we've not been given proper -L
1539 # bits for single-tree newlib and libgloss.
1541 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1542 cat > conftest.$ac_ext << EOF
1543 [#]line __oline__ "configure"
1552 old_CXXFLAGS="$CXXFLAGS"
1554 if AC_TRY_EVAL(ac_compile); then
1555 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1556 enable_sjlj_exceptions=yes
1557 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1558 enable_sjlj_exceptions=no
1561 CXXFLAGS="$old_CXXFLAGS"
1565 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1566 # to two different models.
1567 case $enable_sjlj_exceptions in
1569 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1570 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1571 ac_exception_model_name=sjlj
1574 ac_exception_model_name="call frame"
1577 AC_MSG_ERROR([unable to detect exception model])
1581 AC_MSG_RESULT($ac_exception_model_name)
1586 dnl Add version tags to symbols in shared library (or not), additionally
1587 dnl marking other symbols as private/local (or not).
1589 dnl --enable-symvers=style adds a version script to the linker call when
1590 dnl creating the shared library. The choice of version script is
1591 dnl controlled by 'style'.
1592 dnl --disable-symvers does not.
1593 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1594 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1595 dnl choose a default style based on linker characteristics. Passing
1596 dnl 'no' disables versioning.
1598 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1600 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1601 [enables symbol versioning of the shared library],
1602 [permit yes|no|gnu])
1604 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1605 # don't know enough about $LD to do tricks...
1606 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1607 # FIXME The following test is too strict, in theory.
1608 if test $enable_shared = no ||
1610 test x$glibcxx_gnu_ld_version = x; then
1614 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1615 if test $enable_symvers != no; then
1616 AC_MSG_CHECKING([for shared libgcc])
1617 ac_save_CFLAGS="$CFLAGS"
1619 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1620 CFLAGS="$ac_save_CFLAGS"
1621 if test $glibcxx_shared_libgcc = no; then
1622 cat > conftest.c <<EOF
1623 int main (void) { return 0; }
1626 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1627 -shared -shared-libgcc -o conftest.so \
1628 conftest.c -v 2>&1 >/dev/null \
1629 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1631 rm -f conftest.c conftest.so
1632 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1633 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1634 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1635 CFLAGS="$ac_save_CFLAGS"
1638 AC_MSG_RESULT($glibcxx_shared_libgcc)
1641 # For GNU ld, we need at least this version. The format is described in
1642 # GLIBCXX_CHECK_LINKER_FEATURES above.
1643 glibcxx_min_gnu_ld_version=21400
1644 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1646 # Check to see if unspecified "yes" value can win, given results above.
1647 # Change "yes" into either "no" or a style name.
1648 if test $enable_symvers = yes; then
1649 if test $with_gnu_ld = yes &&
1650 test $glibcxx_shared_libgcc = yes;
1652 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1655 # The right tools, the right setup, but too old. Fallbacks?
1656 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1657 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1658 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1659 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1660 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1661 # Globbing fix is present, proper block support is not.
1662 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1663 dnl enable_symvers=???
1664 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1668 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1674 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1675 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1676 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1677 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1682 # Everything parsed; figure out what file to use.
1683 case $enable_symvers in
1685 SYMVER_MAP=config/linker-map.dummy
1688 SYMVER_MAP=config/linker-map.gnu
1689 AC_DEFINE(_GLIBCXX_SYMVER)
1693 AC_SUBST(SYMVER_MAP)
1694 AC_SUBST(port_specific_symbol_files)
1695 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1696 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1701 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1702 dnl We must stage the required headers so that they will be installed
1703 dnl with the library (unlike libgcc, the STL implementation is provided
1704 dnl solely within headers). Since we must not inject random user-space
1705 dnl macro names into user-provided C++ code, we first stage into <file>-in
1706 dnl and process to <file> with an output command. The reason for a two-
1707 dnl stage process here is to correctly handle $srcdir!=$objdir without
1708 dnl having to write complex code (the sed commands to clean the macro
1709 dnl namespace are complex and fragile enough as it is). We must also
1710 dnl add a relative path so that -I- is supported properly.
1713 dnl glibcxx_thread_h
1716 dnl HAVE_GTHR_DEFAULT
1718 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1719 AC_MSG_CHECKING([for thread model used by GCC])
1720 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1721 AC_MSG_RESULT([$target_thread_file])
1723 if test $target_thread_file != single; then
1724 AC_DEFINE(HAVE_GTHR_DEFAULT)
1727 glibcxx_thread_h=gthr-$target_thread_file.h
1728 AC_SUBST(glibcxx_thread_h)
1732 # Check whether LC_MESSAGES is available in <locale.h>.
1733 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1735 # This file file be copied and used freely without restrictions. It can
1736 # be used in projects which are not available under the GNU Public License
1737 # but which still want to provide support for the GNU gettext functionality.
1738 # Please note that the actual code is *not* freely available.
1741 AC_DEFUN([AC_LC_MESSAGES], [
1742 AC_CHECK_HEADER(locale.h, [
1743 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1744 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1745 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1746 if test $ac_cv_val_LC_MESSAGES = yes; then
1747 AC_DEFINE(HAVE_LC_MESSAGES)
1753 sinclude([../libtool.m4])
1754 dnl The lines below arrange for aclocal not to bring an installed
1755 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1756 dnl add a definition of LIBTOOL to Makefile.in.
1757 ifelse(,,,[AC_SUBST(LIBTOOL)
1758 AC_DEFUN([AM_PROG_LIBTOOL])
1759 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1760 AC_DEFUN([AC_PROG_LD])
1763 dnl vim:et:ts=2:sw=2