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])
31 dnl Initialize the rest of the library configury. At this point we have
32 dnl variables like $host.
35 dnl gcc_version (x.y.z format)
38 dnl glibcxx_builddir (absolute path)
39 dnl glibcxx_srcdir (absolute path)
40 dnl toplevel_srcdir (absolute path)
43 dnl with_target_subdir
45 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
46 dnl - default settings for all AM_CONFITIONAL test variables
47 dnl - lots of tools, like CC and CXX
49 AC_DEFUN([GLIBCXX_CONFIGURE], [
50 # Keep these sync'd with the list in Makefile.am. The first provides an
51 # expandable list at autoconf time; the second provides an expandable list
52 # (i.e., shell variable) at configure time.
53 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
54 SUBDIRS='glibcxx_SUBDIRS'
56 # These need to be absolute paths, yet at the same time need to
57 # canonicalize only relative paths, because then amd will not unmount
58 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
59 glibcxx_builddir=`${PWDCMD-pwd}`
61 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
62 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
64 toplevel_srcdir=${glibcxx_srcdir}/..
65 AC_SUBST(glibcxx_builddir)
66 AC_SUBST(glibcxx_srcdir)
67 AC_SUBST(toplevel_srcdir)
69 # We use these options to decide which functions to include. They are
70 # set from the top level.
71 AC_ARG_WITH([target-subdir],
72 AC_HELP_STRING([--with-target-subdir=SUBDIR],
73 [configuring in a subdirectory]))
75 AC_ARG_WITH([cross-host],
76 AC_HELP_STRING([--with-cross-host=HOST],
77 [configuring with a cross compiler]))
80 AC_HELP_STRING([--with-newlib],
81 [assume newlib as a system C library]))
83 # We're almost certainly being configured before anything else which uses
84 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
85 # we not cache the value of CXX that we "discover" here, because it's set
86 # to something unique for us and libjava. Other target libraries need to
87 # find CXX for themselves. We yank the rug out from under the normal AC_*
88 # process by sneakily renaming the cache variable. This also lets us debug
89 # the value of "our" CXX in postmortems.
91 # We must also force CXX to /not/ be a precious variable, otherwise the
92 # wrong (non-multilib-adjusted) value will be used in multilibs. This
93 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
94 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
95 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
97 # -fno-builtin must be present here so that a non-conflicting form of
98 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
100 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
101 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
102 m4_define([_AC_ARG_VAR_PRECIOUS],[])
103 save_CXXFLAGS="$CXXFLAGS"
104 CXXFLAGS="$CXXFLAGS -fno-builtin"
107 CXXFLAGS="$save_CXXFLAGS"
108 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
112 # For directory versioning (e.g., headers) and other variables.
113 AC_MSG_CHECKING([for GCC version number])
114 gcc_version=`$CXX -dumpversion`
115 AC_MSG_RESULT($gcc_version)
117 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
118 # available). Uncomment the next line to force a particular method.
122 AC_CHECK_TOOL(AS, as)
123 AC_CHECK_TOOL(AR, ar)
124 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
128 # Set up safe default values for all subsequent AM_CONDITIONAL tests
129 # which are themselves conditionally expanded.
130 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
131 ## other macros from doing the same. This should be automated.) -pme
134 #enable_libstdcxx_debug=no
135 #enable_libstdcxx_pch=no
140 #enable_hosted_libstdcxx=yes
142 # Find platform-specific directories containing configuration info.
143 # Also possibly modify flags used elsewhere, as needed by the platform.
148 m4_include([linkage.m4])
149 m4_include([../config/no-executables.m4])
153 dnl Tests for newer compiler features, or features that are present in newer
154 dnl compiler versions but not older compiler versions still in use, should
158 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
159 dnl new inlining code or the new system_header pragma will die on -Werror.
160 dnl Leave it out by default and use maint-mode to use it.
161 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
162 dnl compiler supports it and the user has not requested debug mode.
164 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
165 # All these tests are for C++; save the language and the compiler flags.
166 # The CXXFLAGS thing is suspicious, but based on similar bits previously
167 # found in GLIBCXX_CONFIGURE.
170 ac_test_CXXFLAGS="${CXXFLAGS+set}"
171 ac_save_CXXFLAGS="$CXXFLAGS"
173 # Check for maintainer-mode bits.
174 if test x"$USE_MAINTAINER_MODE" = xno; then
180 # Check for -ffunction-sections -fdata-sections
181 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
182 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
183 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
184 if test "$ac_test_CXXFLAGS" = set; then
185 CXXFLAGS="$ac_save_CXXFLAGS"
187 # this is the suspicious part
190 if test x"$ac_fdsections" = x"yes"; then
191 SECTION_FLAGS='-ffunction-sections -fdata-sections'
193 AC_MSG_RESULT($ac_fdsections)
197 AC_SUBST(SECTION_FLAGS)
202 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
203 dnl the native linker is in use, all variables will be defined to something
204 dnl safe (like an empty string).
207 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
208 dnl OPT_LDFLAGS='-Wl,-O1' if possible
209 dnl LD (as a side effect of testing)
212 dnl glibcxx_gnu_ld_version (possibly)
214 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
215 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
217 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
218 # If we're not using GNU ld, then there's no point in even trying these
219 # tests. Check for that first. We should have already tested for gld
220 # by now (in libtool), but require it now just to be safe...
221 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
222 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
223 AC_REQUIRE([AC_PROG_LD])
224 AC_REQUIRE([AC_PROG_AWK])
226 # The name set by libtool depends on the version of libtool. Shame on us
227 # for depending on an impl detail, but c'est la vie. Older versions used
228 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
229 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
230 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
231 # set (hence we're using an older libtool), then set it.
232 if test x${with_gnu_ld+set} != xset; then
233 if test x${ac_cv_prog_gnu_ld+set} != xset; then
234 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
237 with_gnu_ld=$ac_cv_prog_gnu_ld
241 # Start by getting the version number. I think the libtool test already
242 # does some of this, but throws away the result.
244 ldver=`$LD --version 2>/dev/null | head -1 | \
245 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
247 glibcxx_gnu_ld_version=`echo $ldver | \
248 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
251 if test "$with_gnu_ld" = "notbroken"; then
252 # GNU ld it is! Joy and bunny rabbits!
254 # All these tests are for C++; save the language and the compiler flags.
255 # Need to do this so that g++ won't try to link in libstdc++
256 ac_test_CFLAGS="${CFLAGS+set}"
257 ac_save_CFLAGS="$CFLAGS"
258 CFLAGS='-x c++ -Wl,--gc-sections'
260 # Check for -Wl,--gc-sections
261 # XXX This test is broken at the moment, as symbols required for linking
262 # are now in libsupc++ (not built yet). In addition, this test has
263 # cored on solaris in the past. In addition, --gc-sections doesn't
264 # really work at the moment (keeps on discarding used sections, first
265 # .eh_frame and now some of the glibc sections for iconv).
266 # Bzzzzt. Thanks for playing, maybe next time.
267 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
275 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
276 if test "$ac_test_CFLAGS" = set; then
277 CFLAGS="$ac_save_CFLAGS"
279 # this is the suspicious part
282 if test "$ac_sectionLDflags" = "yes"; then
283 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
285 AC_MSG_RESULT($ac_sectionLDflags)
288 # Set linker optimization flags.
289 if test x"$with_gnu_ld" = x"yes"; then
290 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
293 AC_SUBST(SECTION_LDFLAGS)
294 AC_SUBST(OPT_LDFLAGS)
299 dnl Check to see if this target can enable the wchar_t parts.
300 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
301 dnl must have been previously checked.) By default, wide characters are
305 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
306 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
308 dnl LIBICONV to a -l string containing the iconv library, if needed.
310 AC_DEFUN([GLIBCXX_CHECK_WCHAR_T_SUPPORT], [
311 # Test wchar.h for mbstate_t, which is needed for char_traits and
312 # others even if wchar_t support is not on.
313 AC_MSG_CHECKING([for mbstate_t])
314 AC_TRY_COMPILE([#include <wchar.h>],
315 [mbstate_t teststate;],
316 have_mbstate_t=yes, have_mbstate_t=no)
317 AC_MSG_RESULT($have_mbstate_t)
318 if test x"$have_mbstate_t" = xyes; then
319 AC_DEFINE(HAVE_MBSTATE_T)
322 # Sanity check for existence of ISO C99 headers for extended encoding.
323 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
324 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
326 # Only continue checking if the ISO C99 headers exist and support is on.
327 if test x"$ac_has_wchar_h" = xyes &&
328 test x"$ac_has_wctype_h" = xyes &&
329 test x"$enable_c_mbchar" != xno; then
331 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
332 # numeric_limits can instantiate type_traits<wchar_t>
333 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
334 AC_TRY_COMPILE([#include <wchar.h>],
335 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
336 has_wchar_minmax=yes, has_wchar_minmax=no)
337 AC_MSG_RESULT($has_wchar_minmax)
339 # Test wchar.h for WEOF, which is what we use to determine whether
340 # to specialize for char_traits<wchar_t> or not.
341 AC_MSG_CHECKING([for WEOF])
344 #include <stddef.h>],
346 has_weof=yes, has_weof=no)
347 AC_MSG_RESULT($has_weof)
349 # Tests for wide character functions used in char_traits<wchar_t>.
351 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset],
354 # Checks for names injected into std:: by the c_std headers.
355 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \
356 fwprintf fwscanf swprintf swscanf vfwprintf vswprintf \
357 vwprintf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
358 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstol \
359 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
360 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
363 # Checks for wide character functions that are not required
364 # for basic wchar_t support. Don't disable support if they are missing.
365 # Injection of these is wrapped with guard macros.
366 AC_CHECK_FUNCS([vfwscanf vswscanf vwscanf wcstof iswblank],[],[])
368 AC_MSG_CHECKING([for ISO C99 wchar_t support])
369 if test x"$has_weof" = xyes &&
370 test x"$has_wchar_minmax" = xyes &&
371 test x"$ac_wfuncs" = xyes;
373 ac_isoC99_wchar_t=yes
377 AC_MSG_RESULT($ac_isoC99_wchar_t)
379 # Use iconv for wchar_t to char conversions. As such, check for
380 # X/Open Portability Guide, version 2 features (XPG2).
381 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
382 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
384 # Check for existence of libiconv.a providing XPG2 wchar_t support.
385 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
387 LIBS="$LIBS $LIBICONV"
390 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
391 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
395 AC_MSG_CHECKING([for XPG2 wchar_t support])
396 if test x"$ac_has_iconv_h" = xyes &&
397 test x"$ac_has_langinfo_h" = xyes &&
398 test x"$ac_XPG2funcs" = xyes;
404 AC_MSG_RESULT($ac_XPG2_wchar_t)
406 # At the moment, only enable wchar_t specializations if all the
407 # above support is present.
408 if test x"$ac_isoC99_wchar_t" = xyes &&
409 test x"$ac_XPG2_wchar_t" = xyes;
411 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
415 AC_MSG_CHECKING([for enabled wchar_t specializations])
416 AC_MSG_RESULT($enable_wchar_t)
421 dnl Check for headers for, and arguments to, the setrlimit() function.
422 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
425 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
426 dnl various HAVE_LIMIT_* for individual limit names
428 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
431 #include <sys/time.h>
432 #include <sys/resource.h>
434 [ int f = RLIMIT_$1 ; ],
435 [glibcxx_mresult=1], [glibcxx_mresult=0])
436 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
437 [Only used in build directory testsuite_hooks.h.])
440 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
441 setrlimit_have_headers=yes
442 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
444 [setrlimit_have_headers=no])
445 # If don't have the headers, then we can't run the tests now, and we
446 # won't be seeing any of these during testsuite compilation.
447 if test $setrlimit_have_headers = yes; then
448 # Can't do these in a loop, else the resulting syntax is wrong.
449 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
450 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
451 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
452 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
453 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
455 # Check for rlimit, setrlimit.
456 AC_CACHE_VAL(ac_setrlimit, [
459 #include <sys/time.h>
460 #include <sys/resource.h>
464 [ac_setrlimit=yes], [ac_setrlimit=no])
468 AC_MSG_CHECKING([for testsuite resource limits support])
469 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
471 AC_DEFINE(_GLIBCXX_RES_LIMITS)
475 AC_MSG_RESULT($ac_res_limits)
480 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
481 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
483 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
484 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
486 [#include <sys/stat.h>],
489 S_ISREG(buffer.st_mode);],
490 [glibcxx_cv_S_ISREG=yes],
491 [glibcxx_cv_S_ISREG=no])
493 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
495 [#include <sys/stat.h>],
498 S_IFREG & buffer.st_mode;],
499 [glibcxx_cv_S_IFREG=yes],
500 [glibcxx_cv_S_IFREG=no])
502 if test $glibcxx_cv_S_ISREG = yes; then
503 AC_DEFINE(HAVE_S_ISREG)
504 elif test $glibcxx_cv_S_IFREG = yes; then
505 AC_DEFINE(HAVE_S_IFREG)
511 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
513 AC_DEFUN([GLIBCXX_CHECK_POLL], [
514 AC_CACHE_VAL(glibcxx_cv_POLL, [
517 [struct pollfd pfd[1];
518 pfd[0].events = POLLIN;
520 [glibcxx_cv_POLL=yes],
521 [glibcxx_cv_POLL=no])
523 if test $glibcxx_cv_POLL = yes; then
530 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
532 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
533 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
535 [#include <sys/uio.h>],
536 [struct iovec iov[2];
538 [glibcxx_cv_WRITEV=yes],
539 [glibcxx_cv_WRITEV=no])
541 if test $glibcxx_cv_WRITEV = yes; then
542 AC_DEFINE(HAVE_WRITEV)
548 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
550 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
551 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
553 [#include <stdint.h>],
555 [glibcxx_cv_INT64_T=yes],
556 [glibcxx_cv_INT64_T=no])
558 if test $glibcxx_cv_INT64_T = yes; then
559 AC_DEFINE(HAVE_INT64_T)
565 dnl Check whether LFS support is available.
567 AC_DEFUN([GLIBCXX_CHECK_LFS], [
570 ac_save_CXXFLAGS="$CXXFLAGS"
571 CXXFLAGS="$CXXFLAGS -fno-exceptions"
572 AC_CACHE_VAL(glibcxx_cv_LFS, [
576 #include <sys/stat.h>
580 fseeko64(fp, 0, SEEK_CUR);
582 lseek64(1, 0, SEEK_CUR);
585 [glibcxx_cv_LFS=yes],
588 if test $glibcxx_cv_LFS = yes; then
589 AC_DEFINE(_GLIBCXX_USE_LFS)
591 CXXFLAGS="$ac_save_CXXFLAGS"
597 dnl Check for whether a fully dynamic basic_string implementation should
598 dnl be turned on, that does not put empty objects in per-process static
599 dnl memory (mostly useful together with shared memory allocators, see PR
600 dnl libstdc++/16612 for details).
602 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
603 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
604 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
605 dnl Where DEFAULT is either `yes' or `no'.
607 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
608 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
609 if test $enable_fully_dynamic_string = yes; then
610 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING)
616 dnl Does any necessary configuration of the testsuite directory. Generates
617 dnl the testsuite_hooks.h header.
619 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
622 dnl enable_abi_check / GLIBCXX_TEST_ABI
623 dnl GLIBCXX_TEST_WCHAR_T
624 dnl GLIBCXX_TEST_THREAD
628 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
629 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
630 # Do checks for resource limit functions.
631 GLIBCXX_CHECK_SETRLIMIT
633 # Look for setenv, so that extended locale tests can be performed.
634 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
636 if test $enable_symvers = no; then
641 enable_abi_check=no ;;
643 enable_abi_check=yes ;;
647 # Only build this as native, since automake does not understand
652 # Export file names for ABI checking.
653 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
654 AC_SUBST(baseline_dir)
656 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
657 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_THREAD, test $enable_thread = yes)
658 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
663 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
667 dnl TOPLEVEL_INCLUDES
669 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
670 # Used for every C++ compile we perform.
672 -I$glibcxx_builddir/include/$host_alias \
673 -I$glibcxx_builddir/include \
674 -I$glibcxx_srcdir/libsupc++"
676 # For Canadian crosses, pick this up too.
677 if test $CANADIAN = yes; then
678 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
681 # Stuff in the actual top level. Currently only used by libsupc++ to
682 # get unwind* headers from the gcc dir.
683 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
684 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
686 # Now, export this to all the little Makefiles....
687 AC_SUBST(GLIBCXX_INCLUDES)
688 AC_SUBST(TOPLEVEL_INCLUDES)
693 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
694 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
697 dnl OPTIMIZE_CXXFLAGS
700 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
701 # Optimization flags that are probably a good idea for thrill-seekers. Just
702 # uncomment the lines below and make, everything else is ready to go...
703 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
705 AC_SUBST(OPTIMIZE_CXXFLAGS)
707 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
713 dnl All installation directory information is determined here.
717 dnl glibcxx_prefixdir
718 dnl glibcxx_toolexecdir
719 dnl glibcxx_toolexeclibdir
721 dnl Assumes cross_compiling bits already done, and with_cross_host in
724 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
725 glibcxx_toolexecdir=no
726 glibcxx_toolexeclibdir=no
727 glibcxx_prefixdir=$prefix
729 AC_MSG_CHECKING([for gxx-include-dir])
730 AC_ARG_WITH([gxx-include-dir],
731 AC_HELP_STRING([--with-gxx-include-dir=DIR],
732 [installation directory for include files]),
734 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
735 no) gxx_include_dir=no ;;
736 *) gxx_include_dir=$withval ;;
738 [gxx_include_dir=no])
739 AC_MSG_RESULT($gxx_include_dir)
741 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
742 AC_ARG_ENABLE([version-specific-runtime-libs],
743 AC_HELP_STRING([--enable-version-specific-runtime-libs],
744 [Specify that runtime libraries should be installed in a compiler-specific directory]),
745 [case "$enableval" in
746 yes) version_specific_libs=yes ;;
747 no) version_specific_libs=no ;;
748 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
750 [version_specific_libs=no])
751 AC_MSG_RESULT($version_specific_libs)
753 # Default case for install directory for include files.
754 if test $version_specific_libs = no && test $gxx_include_dir = no; then
755 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
758 # Version-specific runtime libs processing.
759 if test $version_specific_libs = yes; then
760 # Need the gcc compiler version to know where to install libraries
761 # and header files if --enable-version-specific-runtime-libs option
762 # is selected. FIXME: these variables are misnamed, there are
763 # no executables installed in _toolexecdir or _toolexeclibdir.
764 if test x"$gxx_include_dir" = x"no"; then
765 gxx_include_dir='${libdir}/gcc/${host_alias}/'$gcc_version/include/c++
767 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
768 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
771 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
772 # Install a library built with a cross compiler in tooldir, not libdir.
773 if test x"$glibcxx_toolexecdir" = x"no"; then
774 if test -n "$with_cross_host" &&
775 test x"$with_cross_host" != x"no"; then
776 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
777 glibcxx_toolexeclibdir='${toolexecdir}/lib'
779 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
780 glibcxx_toolexeclibdir='${libdir}'
782 multi_os_directory=`$CXX -print-multi-os-directory`
783 case $multi_os_directory in
784 .) ;; # Avoid trailing /.
785 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
789 AC_MSG_CHECKING([for install location])
790 AC_MSG_RESULT($gxx_include_dir)
792 AC_SUBST(glibcxx_prefixdir)
793 AC_SUBST(gxx_include_dir)
794 AC_SUBST(glibcxx_toolexecdir)
795 AC_SUBST(glibcxx_toolexeclibdir)
801 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
802 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
803 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
805 dnl See docs/html/17_intro/configury.html#enable for documentation.
807 m4_define([GLIBCXX_ENABLE],[dnl
808 m4_define([_g_switch],[--enable-$1])dnl
809 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
810 AC_ARG_ENABLE($1,_g_help,
815 m4_bpatsubst([$5],[permit ])) ;;
816 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
817 dnl Idea for future: generate a URL pointing to
818 dnl "onlinedocs/configopts.html#whatever"
825 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
829 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
830 m4_undefine([_g_switch])dnl
831 m4_undefine([_g_help])dnl
836 dnl Check for ISO/IEC 9899:1999 "C99" support.
838 dnl --enable-c99 defines _GLIBCXX_USE_C99
839 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
840 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
841 dnl Where DEFAULT is either `yes' or `no'.
842 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
844 AC_DEFUN([GLIBCXX_ENABLE_C99], [
845 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
850 # Check for the existence of <math.h> functions used if C99 is enabled.
852 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
853 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
854 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
855 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
856 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
857 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
858 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
859 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
860 AC_TRY_COMPILE([#include <math.h>],
861 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
862 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
863 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
864 AC_TRY_COMPILE([#include <math.h>],
865 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
866 AC_TRY_COMPILE([#include <math.h>],
867 [isunordered(0.0,0.0);],, [ac_c99_math=no])
868 AC_MSG_RESULT($ac_c99_math)
870 if test x"$ac_c99_math" = x"yes"; then
871 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
874 # Check for the existence in <stdio.h> of vscanf, et. al.
876 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
877 AC_TRY_COMPILE([#include <stdio.h>],
878 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
879 AC_TRY_COMPILE([#include <stdio.h>
881 void foo(char* fmt, ...)
882 {va_list args; va_start(args, fmt);
883 vfscanf(stderr, "%i", args);}],
884 [],, [ac_c99_stdio=no])
885 AC_TRY_COMPILE([#include <stdio.h>
887 void foo(char* fmt, ...)
888 {va_list args; va_start(args, fmt);
889 vscanf("%i", args);}],
890 [],, [ac_c99_stdio=no])
891 AC_TRY_COMPILE([#include <stdio.h>
893 void foo(char* fmt, ...)
894 {va_list args; va_start(args, fmt);
895 vsnprintf(fmt, 0, "%i", args);}],
896 [],, [ac_c99_stdio=no])
897 AC_TRY_COMPILE([#include <stdio.h>
899 void foo(char* fmt, ...)
900 {va_list args; va_start(args, fmt);
901 vsscanf(fmt, "%i", args);}],
902 [],, [ac_c99_stdio=no])
903 AC_MSG_RESULT($ac_c99_stdio)
905 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
907 AC_MSG_CHECKING([for lldiv_t declaration])
908 AC_CACHE_VAL(ac_c99_lldiv_t, [
909 AC_TRY_COMPILE([#include <stdlib.h>],
911 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
913 AC_MSG_RESULT($ac_c99_lldiv_t)
915 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
916 AC_TRY_COMPILE([#include <stdlib.h>],
917 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
918 AC_TRY_COMPILE([#include <stdlib.h>],
919 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
920 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
921 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
922 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
923 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
924 if test x"$ac_c99_lldiv_t" = x"no"; then
927 AC_MSG_RESULT($ac_c99_stdlib)
929 # Check for the existence of <wchar.h> functions used if C99 is enabled.
930 # XXX the wchar.h checks should be rolled into the general C99 bits.
932 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
933 AC_TRY_COMPILE([#include <wchar.h>],
934 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
935 AC_TRY_COMPILE([#include <wchar.h>],
936 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
937 AC_TRY_COMPILE([#include <wchar.h>],
938 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
939 AC_MSG_RESULT($ac_c99_wchar)
941 AC_MSG_CHECKING([for enabled ISO C99 support])
942 if test x"$ac_c99_math" = x"no" ||
943 test x"$ac_c99_stdio" = x"no" ||
944 test x"$ac_c99_stdlib" = x"no" ||
945 test x"$ac_c99_wchar" = x"no"; then
948 AC_MSG_RESULT($enable_c99)
950 if test x"$ac_99_math" = x"yes"; then
951 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
954 # Option parsed, now set things appropriately
955 if test x"$enable_c99" = x"yes"; then
956 AC_DEFINE(_GLIBCXX_USE_C99)
964 dnl Check for what type of C headers to use.
966 dnl --enable-cheaders= [does stuff].
967 dnl --disable-cheaders [does not do anything, really].
968 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
969 dnl Where DEFAULT is either `c' or `c_std'.
971 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
972 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
973 [construct "C" headers for g++], [permit c|c_std])
974 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
976 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
978 AC_SUBST(C_INCLUDE_DIR)
979 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
980 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
981 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
986 dnl Check for which locale library to use. The choice is mapped to
987 dnl a subdirectory of config/locale.
989 dnl Default is generic.
991 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
992 AC_MSG_CHECKING([for C locale to use])
993 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
994 [use MODEL for target locale package],
995 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
997 # If they didn't use this option switch, or if they specified --enable
998 # with no specific model, we'll have to look for one. If they
999 # specified --disable (???), do likewise.
1000 if test $enable_clocale = no || test $enable_clocale = yes; then
1004 # Either a known package, or "auto"
1005 enable_clocale_flag=$enable_clocale
1007 # Probe for locale support if no specific model is specified.
1008 # Default to "generic".
1009 if test $enable_clocale_flag = auto; then
1010 case ${target_os} in
1011 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1012 AC_EGREP_CPP([_GLIBCXX_ok], [
1013 #include <features.h>
1014 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1017 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1019 # Test for bugs early in glibc-2.2.x series
1020 if test $enable_clocale_flag = gnu; then
1022 #define _GNU_SOURCE 1
1025 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1026 extern __typeof(newlocale) __newlocale;
1027 extern __typeof(duplocale) __duplocale;
1028 extern __typeof(strcoll_l) __strcoll_l;
1032 const char __one[] = "Äuglein Augmen";
1033 const char __two[] = "Äuglein";
1038 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1039 loc_dup = __duplocale(loc);
1040 i = __strcoll_l(__one, __two, loc);
1041 j = __strcoll_l(__one, __two, loc_dup);
1045 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1046 [enable_clocale_flag=generic])
1049 # ... at some point put __strxfrm_l tests in as well.
1052 enable_clocale_flag=darwin
1055 enable_clocale_flag=generic
1060 # Deal with gettext issues. Default to not using it (=no) until we detect
1061 # support for it later. Let the user turn it off via --e/d, but let that
1062 # default to on for easier handling.
1065 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1069 # Set configure bits for specified locale package
1070 case ${enable_clocale_flag} in
1072 AC_MSG_RESULT(generic)
1074 CLOCALE_H=config/locale/generic/c_locale.h
1075 CLOCALE_CC=config/locale/generic/c_locale.cc
1076 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1077 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1078 CCOLLATE_CC=config/locale/generic/collate_members.cc
1079 CCTYPE_CC=config/locale/generic/ctype_members.cc
1080 CMESSAGES_H=config/locale/generic/messages_members.h
1081 CMESSAGES_CC=config/locale/generic/messages_members.cc
1082 CMONEY_CC=config/locale/generic/monetary_members.cc
1083 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1084 CTIME_H=config/locale/generic/time_members.h
1085 CTIME_CC=config/locale/generic/time_members.cc
1086 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1089 AC_MSG_RESULT(darwin)
1091 CLOCALE_H=config/locale/generic/c_locale.h
1092 CLOCALE_CC=config/locale/generic/c_locale.cc
1093 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1094 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1095 CCOLLATE_CC=config/locale/generic/collate_members.cc
1096 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1097 CMESSAGES_H=config/locale/generic/messages_members.h
1098 CMESSAGES_CC=config/locale/generic/messages_members.cc
1099 CMONEY_CC=config/locale/generic/monetary_members.cc
1100 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1101 CTIME_H=config/locale/generic/time_members.h
1102 CTIME_CC=config/locale/generic/time_members.cc
1103 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1109 # Declare intention to use gettext, and add support for specific
1111 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1114 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1115 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1116 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1119 # Export the build objects.
1120 for ling in $ALL_LINGUAS; do \
1121 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1122 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1124 AC_SUBST(glibcxx_MOFILES)
1125 AC_SUBST(glibcxx_POFILES)
1127 CLOCALE_H=config/locale/gnu/c_locale.h
1128 CLOCALE_CC=config/locale/gnu/c_locale.cc
1129 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1130 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1131 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1132 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1133 CMESSAGES_H=config/locale/gnu/messages_members.h
1134 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1135 CMONEY_CC=config/locale/gnu/monetary_members.cc
1136 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1137 CTIME_H=config/locale/gnu/time_members.h
1138 CTIME_CC=config/locale/gnu/time_members.cc
1139 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1142 AC_MSG_RESULT(IEEE 1003.1)
1144 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1145 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1146 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1147 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1148 CCOLLATE_CC=config/locale/generic/collate_members.cc
1149 CCTYPE_CC=config/locale/generic/ctype_members.cc
1150 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1151 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1152 CMONEY_CC=config/locale/generic/monetary_members.cc
1153 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1154 CTIME_H=config/locale/generic/time_members.h
1155 CTIME_CC=config/locale/generic/time_members.cc
1156 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1160 # This is where the testsuite looks for locale catalogs, using the
1161 # -DLOCALEDIR define during testsuite compilation.
1162 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1163 AC_SUBST(glibcxx_localedir)
1165 # A standalone libintl (e.g., GNU libintl) may be in use.
1166 if test $USE_NLS = yes; then
1167 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1168 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1170 if test $USE_NLS = yes; then
1171 AC_DEFINE(_GLIBCXX_USE_NLS)
1176 AC_SUBST(CCODECVT_H)
1177 AC_SUBST(CMESSAGES_H)
1178 AC_SUBST(CCODECVT_CC)
1179 AC_SUBST(CCOLLATE_CC)
1181 AC_SUBST(CMESSAGES_CC)
1183 AC_SUBST(CNUMERIC_CC)
1186 AC_SUBST(CLOCALE_CC)
1187 AC_SUBST(CLOCALE_INTERNAL_H)
1192 dnl Check for which std::allocator base class to use. The choice is
1193 dnl mapped from a subdirectory of include/ext.
1197 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1198 AC_MSG_CHECKING([for std::allocator base class to use])
1199 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1200 [use KIND for target std::allocator base],
1201 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1203 # If they didn't use this option switch, or if they specified --enable
1204 # with no specific model, we'll have to look for one. If they
1205 # specified --disable (???), do likewise.
1206 if test $enable_libstdcxx_allocator = no ||
1207 test $enable_libstdcxx_allocator = yes;
1209 enable_libstdcxx_allocator=auto
1212 # Either a known package, or "auto". Auto implies the default choice
1213 # for a particular platform.
1214 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1216 # Probe for host-specific support if no specific model is specified.
1218 if test $enable_libstdcxx_allocator_flag = auto; then
1219 case ${target_os} in
1220 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1221 enable_libstdcxx_allocator_flag=mt
1224 enable_libstdcxx_allocator_flag=new
1228 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1231 # Set configure bits for specified locale package
1232 case ${enable_libstdcxx_allocator_flag} in
1234 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1235 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1238 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1239 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1242 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1243 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1246 ALLOCATOR_H=config/allocator/new_allocator_base.h
1247 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1250 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1251 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1255 AC_SUBST(ALLOCATOR_H)
1256 AC_SUBST(ALLOCATOR_NAME)
1261 dnl Check for whether the Boost-derived checks should be turned on.
1263 dnl --enable-concept-checks turns them on.
1264 dnl --disable-concept-checks leaves them off.
1265 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1266 dnl Where DEFAULT is either `yes' or `no'.
1268 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1269 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1270 if test $enable_concept_checks = yes; then
1271 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1277 dnl Check for which I/O library to use: stdio, or something specific.
1279 dnl Default is stdio.
1281 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1282 AC_MSG_CHECKING([for underlying I/O to use])
1283 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1284 [use target-specific I/O package], [permit stdio])
1286 # Now that libio has been removed, you can have any color you want as long
1287 # as it's black. This is one big no-op until other packages are added, but
1288 # showing the framework never hurts.
1289 case ${enable_cstdio} in
1291 CSTDIO_H=config/io/c_io_stdio.h
1292 BASIC_FILE_H=config/io/basic_file_stdio.h
1293 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1294 AC_MSG_RESULT(stdio)
1299 AC_SUBST(BASIC_FILE_H)
1300 AC_SUBST(BASIC_FILE_CC)
1305 dnl Check for "unusual" flags to pass to the compiler while building.
1307 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1308 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1309 dnl --disable-cxx-flags passes nothing.
1310 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1311 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1312 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1313 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1314 dnl If "default flags" is an empty string, the effect is the same
1315 dnl as --disable or --enable=no.
1317 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1318 AC_MSG_CHECKING([for extra compiler flags for building])
1319 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1320 [pass compiler FLAGS when building library],
1321 [case "x$enable_cxx_flags" in
1322 xno | x) enable_cxx_flags= ;;
1324 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1327 # Run through flags (either default or command-line) and set anything
1328 # extra (e.g., #defines) that must accompany particular g++ options.
1329 if test -n "$enable_cxx_flags"; then
1330 for f in $enable_cxx_flags; do
1334 *) # and we're trying to pass /what/ exactly?
1335 AC_MSG_ERROR([compiler flags start with a -]) ;;
1340 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1341 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1342 AC_SUBST(EXTRA_CXX_FLAGS)
1347 dnl Check for wide character support. Has the same effect as the option
1348 dnl in gcc's configure, but in a form that autoconf can mess with.
1350 dnl --enable-c-mbchar requests all the wchar_t stuff.
1351 dnl --disable-c-mbchar doesn't.
1352 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1353 dnl Where DEFAULT is either `yes' or `no'.
1355 AC_DEFUN([GLIBCXX_ENABLE_C_MBCHAR], [
1356 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1357 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1362 dnl Check to see if debugging libraries are to be built.
1364 dnl --enable-libstdcxx-debug
1365 dnl builds a separate set of debugging libraries in addition to the
1366 dnl normal (shared, static) libstdc++ binaries.
1368 dnl --disable-libstdcxx-debug
1369 dnl builds only one (non-debug) version of libstdc++.
1371 dnl --enable-libstdcxx-debug-flags=FLAGS
1372 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1374 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1375 dnl Where DEFAULT is either `yes' or `no'.
1377 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1378 AC_MSG_CHECKING([for additional debug build])
1379 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1380 AC_MSG_RESULT($enable_libstdcxx_debug)
1381 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1386 dnl Check for explicit debug flags.
1388 dnl --enable-libstdcxx-debug-flags='-O1'
1389 dnl is a general method for passing flags to be used when
1390 dnl building debug libraries with --enable-debug.
1392 dnl --disable-libstdcxx-debug-flags does nothing.
1393 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1394 dnl If "default flags" is an empty string, the effect is the same
1395 dnl as --disable or --enable=no.
1397 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1398 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1399 [pass compiler FLAGS when building debug library],
1400 [case "x$enable_libstdcxx_debug_flags" in
1401 xno | x) enable_libstdcxx_debug_flags= ;;
1403 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1406 # Option parsed, now set things appropriately
1407 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1408 AC_SUBST(DEBUG_FLAGS)
1410 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1415 dnl Check if the user only wants a freestanding library implementation.
1417 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1418 dnl installing only the headers required by [17.4.1.3] and the language
1419 dnl support library. More than that will be built (to keep the Makefiles
1420 dnl conveniently clean), but not installed.
1423 dnl is_hosted (yes/no)
1426 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1428 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1429 AC_ARG_ENABLE([hosted-libstdcxx],
1430 AC_HELP_STRING([--disable-hosted-libstdcxx],
1431 [only build freestanding C++ runtime support]),,
1434 enable_hosted_libstdcxx=no
1437 enable_hosted_libstdcxx=yes
1440 if test "$enable_hosted_libstdcxx" = no; then
1441 AC_MSG_NOTICE([Only freestanding libraries will be built])
1445 enable_libstdcxx_pch=no
1450 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1451 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1452 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1457 dnl Check for template specializations for the 'long long' type extension.
1458 dnl The result determines only whether 'long long' I/O is enabled; things
1459 dnl like numeric_limits<> specializations are always available.
1461 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1462 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1463 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1464 dnl Where DEFAULT is either `yes' or `no'.
1466 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1467 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1468 if test $enable_long_long = yes; then
1469 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1475 dnl Check to see if building and using a C++ precompiled header can be done.
1477 dnl --enable-libstdcxx-pch=yes
1478 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1479 dnl may work, after some light-hearted attempts to puzzle out compiler
1480 dnl support, flip bits on in include/Makefile.am
1482 dnl --disable-libstdcxx-pch
1483 dnl turns off attempts to use or build stdc++.h.gch.
1486 dnl glibcxx_PCHFLAGS
1488 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1489 AC_MSG_CHECKING([for enabled PCH])
1490 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1491 AC_MSG_RESULT([$enable_libstdcxx_pch])
1493 if test $enable_libstdcxx_pch = yes; then
1494 AC_CACHE_CHECK([for compiler with PCH support],
1495 [glibcxx_cv_prog_CXX_pch],
1496 [ac_save_CXXFLAGS="$CXXFLAGS"
1497 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1500 echo '#include <math.h>' > conftest.h
1501 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1502 -o conftest.h.gch 1>&5 2>&1 &&
1503 echo '#error "pch failed"' > conftest.h &&
1504 echo '#include "conftest.h"' > conftest.cc &&
1505 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1507 glibcxx_cv_prog_CXX_pch=yes
1509 glibcxx_cv_prog_CXX_pch=no
1512 CXXFLAGS=$ac_save_CXXFLAGS
1515 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1518 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1519 if test $enable_libstdcxx_pch = yes; then
1520 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1524 AC_SUBST(glibcxx_PCHFLAGS)
1529 dnl Check for exception handling support. If an explicit enable/disable
1530 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1531 dnl target may or may not support call frame exceptions.
1533 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1534 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1535 dnl Neither one forces an attempt at detection.
1538 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1540 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1541 AC_MSG_CHECKING([for exception model to use])
1544 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1545 [force use of builtin_setjmp for exceptions],
1546 [permit yes|no|auto])
1548 if test $enable_sjlj_exceptions = auto; then
1549 # Botheration. Now we've got to detect the exception model. Link tests
1550 # against libgcc.a are problematic since we've not been given proper -L
1551 # bits for single-tree newlib and libgloss.
1553 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1554 cat > conftest.$ac_ext << EOF
1555 [#]line __oline__ "configure"
1564 old_CXXFLAGS="$CXXFLAGS"
1566 if AC_TRY_EVAL(ac_compile); then
1567 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1568 enable_sjlj_exceptions=yes
1569 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1570 enable_sjlj_exceptions=no
1573 CXXFLAGS="$old_CXXFLAGS"
1577 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1578 # to two different models.
1579 case $enable_sjlj_exceptions in
1581 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1582 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1583 ac_exception_model_name=sjlj
1586 ac_exception_model_name="call frame"
1589 AC_MSG_ERROR([unable to detect exception model])
1593 AC_MSG_RESULT($ac_exception_model_name)
1598 dnl Add version tags to symbols in shared library (or not), additionally
1599 dnl marking other symbols as private/local (or not).
1601 dnl --enable-symvers=style adds a version script to the linker call when
1602 dnl creating the shared library. The choice of version script is
1603 dnl controlled by 'style'.
1604 dnl --disable-symvers does not.
1605 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1606 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1607 dnl choose a default style based on linker characteristics. Passing
1608 dnl 'no' disables versioning.
1610 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1612 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1613 [enables symbol versioning of the shared library],
1614 [permit yes|no|gnu])
1616 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1617 # don't know enough about $LD to do tricks...
1618 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1619 # FIXME The following test is too strict, in theory.
1620 if test $enable_shared = no ||
1622 test x$glibcxx_gnu_ld_version = x; then
1626 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1627 if test $enable_symvers != no; then
1628 AC_MSG_CHECKING([for shared libgcc])
1629 ac_save_CFLAGS="$CFLAGS"
1631 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1632 CFLAGS="$ac_save_CFLAGS"
1633 if test $glibcxx_shared_libgcc = no; then
1634 cat > conftest.c <<EOF
1635 int main (void) { return 0; }
1638 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1639 -shared -shared-libgcc -o conftest.so \
1640 conftest.c -v 2>&1 >/dev/null \
1641 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1643 rm -f conftest.c conftest.so
1644 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1645 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1646 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1647 CFLAGS="$ac_save_CFLAGS"
1650 AC_MSG_RESULT($glibcxx_shared_libgcc)
1653 # For GNU ld, we need at least this version. The format is described in
1654 # GLIBCXX_CHECK_LINKER_FEATURES above.
1655 glibcxx_min_gnu_ld_version=21400
1656 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1658 # Check to see if unspecified "yes" value can win, given results above.
1659 # Change "yes" into either "no" or a style name.
1660 if test $enable_symvers = yes; then
1661 if test $with_gnu_ld = yes &&
1662 test $glibcxx_shared_libgcc = yes;
1664 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1667 # The right tools, the right setup, but too old. Fallbacks?
1668 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1669 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1670 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1671 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1672 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1673 # Globbing fix is present, proper block support is not.
1674 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1675 dnl enable_symvers=???
1676 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1680 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1686 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1687 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1688 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1689 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1694 # Everything parsed; figure out what file to use.
1695 case $enable_symvers in
1697 SYMVER_MAP=config/linker-map.dummy
1700 SYMVER_MAP=config/linker-map.gnu
1701 AC_DEFINE(_GLIBCXX_SYMVER)
1705 AC_SUBST(SYMVER_MAP)
1706 AC_SUBST(port_specific_symbol_files)
1707 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1708 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1713 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1714 dnl We must stage the required headers so that they will be installed
1715 dnl with the library (unlike libgcc, the STL implementation is provided
1716 dnl solely within headers). Since we must not inject random user-space
1717 dnl macro names into user-provided C++ code, we first stage into <file>-in
1718 dnl and process to <file> with an output command. The reason for a two-
1719 dnl stage process here is to correctly handle $srcdir!=$objdir without
1720 dnl having to write complex code (the sed commands to clean the macro
1721 dnl namespace are complex and fragile enough as it is). We must also
1722 dnl add a relative path so that -I- is supported properly.
1725 dnl glibcxx_thread_h
1728 dnl HAVE_GTHR_DEFAULT
1730 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1731 AC_MSG_CHECKING([for thread model used by GCC])
1732 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1733 AC_MSG_RESULT([$target_thread_file])
1735 if test $target_thread_file != single; then
1736 AC_DEFINE(HAVE_GTHR_DEFAULT)
1739 glibcxx_thread_h=gthr-$target_thread_file.h
1741 dnl Check for __GTHREADS define.
1742 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
1743 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
1749 AC_SUBST(glibcxx_thread_h)
1753 # Check whether LC_MESSAGES is available in <locale.h>.
1754 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1756 # This file file be copied and used freely without restrictions. It can
1757 # be used in projects which are not available under the GNU Public License
1758 # but which still want to provide support for the GNU gettext functionality.
1759 # Please note that the actual code is *not* freely available.
1762 AC_DEFUN([AC_LC_MESSAGES], [
1763 AC_CHECK_HEADER(locale.h, [
1764 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1765 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1766 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1767 if test $ac_cv_val_LC_MESSAGES = yes; then
1768 AC_DEFINE(HAVE_LC_MESSAGES)
1774 sinclude([../libtool.m4])
1775 dnl The lines below arrange for aclocal not to bring an installed
1776 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1777 dnl add a definition of LIBTOOL to Makefile.in.
1778 ifelse(,,,[AC_SUBST(LIBTOOL)
1779 AC_DEFUN([AM_PROG_LIBTOOL])
1780 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1781 AC_DEFUN([AC_PROG_LD])
1784 dnl vim:et:ts=2:sw=2