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, [
579 fseeko64(fp, 0, SEEK_CUR);
581 lseek64(1, 0, SEEK_CUR);],
582 [glibcxx_cv_LFS=yes],
585 if test $glibcxx_cv_LFS = yes; then
586 AC_DEFINE(_GLIBCXX_USE_LFS)
588 CXXFLAGS="$ac_save_CXXFLAGS"
594 dnl Does any necessary configuration of the testsuite directory. Generates
595 dnl the testsuite_hooks.h header.
597 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
600 dnl enable_abi_check / GLIBCXX_TEST_ABI
604 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
605 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
606 # Do checks for resource limit functions.
607 GLIBCXX_CHECK_SETRLIMIT
609 # Look for setenv, so that extended locale tests can be performed.
610 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
612 if test $enable_symvers = no; then
617 enable_abi_check=no ;;
619 enable_abi_check=yes ;;
623 # Only build this as native, since automake does not understand
628 # Export file names for ABI checking.
629 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
630 AC_SUBST(baseline_dir)
632 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
633 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
638 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
642 dnl TOPLEVEL_INCLUDES
644 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
645 # Used for every C++ compile we perform.
647 -I$glibcxx_builddir/include/$host_alias \
648 -I$glibcxx_builddir/include \
649 -I$glibcxx_srcdir/libsupc++"
651 # For Canadian crosses, pick this up too.
652 if test $CANADIAN = yes; then
653 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
656 # Stuff in the actual top level. Currently only used by libsupc++ to
657 # get unwind* headers from the gcc dir.
658 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
659 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
661 # Now, export this to all the little Makefiles....
662 AC_SUBST(GLIBCXX_INCLUDES)
663 AC_SUBST(TOPLEVEL_INCLUDES)
668 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
669 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
672 dnl OPTIMIZE_CXXFLAGS
675 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
676 # Optimization flags that are probably a good idea for thrill-seekers. Just
677 # uncomment the lines below and make, everything else is ready to go...
678 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
680 AC_SUBST(OPTIMIZE_CXXFLAGS)
682 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
688 dnl All installation directory information is determined here.
692 dnl glibcxx_prefixdir
693 dnl glibcxx_toolexecdir
694 dnl glibcxx_toolexeclibdir
696 dnl Assumes cross_compiling bits already done, and with_cross_host in
699 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
700 glibcxx_toolexecdir=no
701 glibcxx_toolexeclibdir=no
702 glibcxx_prefixdir=$prefix
704 AC_MSG_CHECKING([for gxx-include-dir])
705 AC_ARG_WITH([gxx-include-dir],
706 AC_HELP_STRING([--with-gxx-include-dir=DIR],
707 [installation directory for include files]),
709 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
710 no) gxx_include_dir=no ;;
711 *) gxx_include_dir=$withval ;;
713 [gxx_include_dir=no])
714 AC_MSG_RESULT($gxx_include_dir)
716 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
717 AC_ARG_ENABLE([version-specific-runtime-libs],
718 AC_HELP_STRING([--enable-version-specific-runtime-libs],
719 [Specify that runtime libraries should be installed in a compiler-specific directory]),
720 [case "$enableval" in
721 yes) version_specific_libs=yes ;;
722 no) version_specific_libs=no ;;
723 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
725 [version_specific_libs=no])
726 AC_MSG_RESULT($version_specific_libs)
728 # Default case for install directory for include files.
729 if test $version_specific_libs = no && test $gxx_include_dir = no; then
730 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
733 # Version-specific runtime libs processing.
734 if test $version_specific_libs = yes; then
735 # Need the gcc compiler version to know where to install libraries
736 # and header files if --enable-version-specific-runtime-libs option
737 # is selected. FIXME: these variables are misnamed, there are
738 # no executables installed in _toolexecdir or _toolexeclibdir.
739 if test x"$gxx_include_dir" = x"no"; then
740 gxx_include_dir='${libdir}/gcc/${host_alias}/'$gcc_version/include/c++
742 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
743 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
746 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
747 # Install a library built with a cross compiler in tooldir, not libdir.
748 if test x"$glibcxx_toolexecdir" = x"no"; then
749 if test -n "$with_cross_host" &&
750 test x"$with_cross_host" != x"no"; then
751 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
752 glibcxx_toolexeclibdir='${toolexecdir}/lib'
754 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
755 glibcxx_toolexeclibdir='${libdir}'
757 multi_os_directory=`$CXX -print-multi-os-directory`
758 case $multi_os_directory in
759 .) ;; # Avoid trailing /.
760 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
764 AC_MSG_CHECKING([for install location])
765 AC_MSG_RESULT($gxx_include_dir)
767 AC_SUBST(glibcxx_prefixdir)
768 AC_SUBST(gxx_include_dir)
769 AC_SUBST(glibcxx_toolexecdir)
770 AC_SUBST(glibcxx_toolexeclibdir)
776 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
777 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
778 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
780 dnl See docs/html/17_intro/configury.html#enable for documentation.
782 m4_define([GLIBCXX_ENABLE],[dnl
783 m4_define([_g_switch],[--enable-$1])dnl
784 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
785 AC_ARG_ENABLE($1,_g_help,
790 m4_bpatsubst([$5],[permit ])) ;;
791 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
792 dnl Idea for future: generate a URL pointing to
793 dnl "onlinedocs/configopts.html#whatever"
800 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
804 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
805 m4_undefine([_g_switch])dnl
806 m4_undefine([_g_help])dnl
811 dnl Check for ISO/IEC 9899:1999 "C99" support.
813 dnl --enable-c99 defines _GLIBCXX_USE_C99
814 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
815 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
816 dnl Where DEFAULT is either `yes' or `no'.
817 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
819 AC_DEFUN([GLIBCXX_ENABLE_C99], [
820 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
825 # Check for the existence of <math.h> functions used if C99 is enabled.
827 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
828 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
829 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
830 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
831 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
832 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
833 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
834 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
835 AC_TRY_COMPILE([#include <math.h>],
836 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
837 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
838 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
839 AC_TRY_COMPILE([#include <math.h>],
840 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
841 AC_TRY_COMPILE([#include <math.h>],
842 [isunordered(0.0,0.0);],, [ac_c99_math=no])
843 AC_MSG_RESULT($ac_c99_math)
845 if test x"$ac_c99_math" = x"yes"; then
846 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
849 # Check for the existence in <stdio.h> of vscanf, et. al.
851 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
852 AC_TRY_COMPILE([#include <stdio.h>],
853 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
854 AC_TRY_COMPILE([#include <stdio.h>
856 void foo(char* fmt, ...)
857 {va_list args; va_start(args, fmt);
858 vfscanf(stderr, "%i", args);}],
859 [],, [ac_c99_stdio=no])
860 AC_TRY_COMPILE([#include <stdio.h>
862 void foo(char* fmt, ...)
863 {va_list args; va_start(args, fmt);
864 vscanf("%i", args);}],
865 [],, [ac_c99_stdio=no])
866 AC_TRY_COMPILE([#include <stdio.h>
868 void foo(char* fmt, ...)
869 {va_list args; va_start(args, fmt);
870 vsnprintf(fmt, 0, "%i", args);}],
871 [],, [ac_c99_stdio=no])
872 AC_TRY_COMPILE([#include <stdio.h>
874 void foo(char* fmt, ...)
875 {va_list args; va_start(args, fmt);
876 vsscanf(fmt, "%i", args);}],
877 [],, [ac_c99_stdio=no])
878 AC_MSG_RESULT($ac_c99_stdio)
880 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
882 AC_MSG_CHECKING([for lldiv_t declaration])
883 AC_CACHE_VAL(ac_c99_lldiv_t, [
884 AC_TRY_COMPILE([#include <stdlib.h>],
886 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
888 AC_MSG_RESULT($ac_c99_lldiv_t)
890 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
891 AC_TRY_COMPILE([#include <stdlib.h>],
892 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
893 AC_TRY_COMPILE([#include <stdlib.h>],
894 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
895 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
896 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
897 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
898 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
899 if test x"$ac_c99_lldiv_t" = x"no"; then
902 AC_MSG_RESULT($ac_c99_stdlib)
904 # Check for the existence of <wchar.h> functions used if C99 is enabled.
905 # XXX the wchar.h checks should be rolled into the general C99 bits.
907 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
908 AC_TRY_COMPILE([#include <wchar.h>],
909 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
910 AC_TRY_COMPILE([#include <wchar.h>],
911 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
912 AC_TRY_COMPILE([#include <wchar.h>],
913 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
914 AC_MSG_RESULT($ac_c99_wchar)
916 AC_MSG_CHECKING([for enabled ISO C99 support])
917 if test x"$ac_c99_math" = x"no" ||
918 test x"$ac_c99_stdio" = x"no" ||
919 test x"$ac_c99_stdlib" = x"no" ||
920 test x"$ac_c99_wchar" = x"no"; then
923 AC_MSG_RESULT($enable_c99)
925 if test x"$ac_99_math" = x"yes"; then
926 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
929 # Option parsed, now set things appropriately
930 if test x"$enable_c99" = x"yes"; then
931 AC_DEFINE(_GLIBCXX_USE_C99)
939 dnl Check for what type of C headers to use.
941 dnl --enable-cheaders= [does stuff].
942 dnl --disable-cheaders [does not do anything, really].
943 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
944 dnl Where DEFAULT is either `c' or `c_std'.
946 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
947 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
948 [construct "C" headers for g++], [permit c|c_std])
949 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
951 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
953 AC_SUBST(C_INCLUDE_DIR)
954 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
955 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
956 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
961 dnl Check for which locale library to use. The choice is mapped to
962 dnl a subdirectory of config/locale.
964 dnl Default is generic.
966 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
967 AC_MSG_CHECKING([for C locale to use])
968 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
969 [use MODEL for target locale package],
970 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
972 # If they didn't use this option switch, or if they specified --enable
973 # with no specific model, we'll have to look for one. If they
974 # specified --disable (???), do likewise.
975 if test $enable_clocale = no || test $enable_clocale = yes; then
979 # Either a known package, or "auto"
980 enable_clocale_flag=$enable_clocale
982 # Probe for locale support if no specific model is specified.
983 # Default to "generic".
984 if test $enable_clocale_flag = auto; then
985 case x${target_os} in
986 xlinux* | xgnu* | xkfreebsd*-gnu | xknetbsd*-gnu)
987 AC_EGREP_CPP([_GLIBCXX_ok], [
988 #include <features.h>
989 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
992 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
994 # Test for bugs early in glibc-2.2.x series
995 if test x$enable_clocale_flag = xgnu; then
997 #define _GNU_SOURCE 1
1000 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1001 extern __typeof(newlocale) __newlocale;
1002 extern __typeof(duplocale) __duplocale;
1003 extern __typeof(strcoll_l) __strcoll_l;
1007 const char __one[] = "Äuglein Augmen";
1008 const char __two[] = "Äuglein";
1013 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1014 loc_dup = __duplocale(loc);
1015 i = __strcoll_l(__one, __two, loc);
1016 j = __strcoll_l(__one, __two, loc_dup);
1020 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1021 [enable_clocale_flag=generic])
1024 # ... at some point put __strxfrm_l tests in as well.
1027 enable_clocale_flag=generic
1032 # Deal with gettext issues. Default to not using it (=no) until we detect
1033 # support for it later. Let the user turn it off via --e/d, but let that
1034 # default to on for easier handling.
1037 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1041 # Set configure bits for specified locale package
1042 case ${enable_clocale_flag} in
1044 AC_MSG_RESULT(generic)
1046 CLOCALE_H=config/locale/generic/c_locale.h
1047 CLOCALE_CC=config/locale/generic/c_locale.cc
1048 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1049 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1050 CCOLLATE_CC=config/locale/generic/collate_members.cc
1051 CCTYPE_CC=config/locale/generic/ctype_members.cc
1052 CMESSAGES_H=config/locale/generic/messages_members.h
1053 CMESSAGES_CC=config/locale/generic/messages_members.cc
1054 CMONEY_CC=config/locale/generic/monetary_members.cc
1055 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1056 CTIME_H=config/locale/generic/time_members.h
1057 CTIME_CC=config/locale/generic/time_members.cc
1058 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1063 # Declare intention to use gettext, and add support for specific
1065 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1068 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1069 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1070 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1073 # Export the build objects.
1074 for ling in $ALL_LINGUAS; do \
1075 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1076 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1078 AC_SUBST(glibcxx_MOFILES)
1079 AC_SUBST(glibcxx_POFILES)
1081 CLOCALE_H=config/locale/gnu/c_locale.h
1082 CLOCALE_CC=config/locale/gnu/c_locale.cc
1083 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1084 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1085 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1086 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1087 CMESSAGES_H=config/locale/gnu/messages_members.h
1088 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1089 CMONEY_CC=config/locale/gnu/monetary_members.cc
1090 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1091 CTIME_H=config/locale/gnu/time_members.h
1092 CTIME_CC=config/locale/gnu/time_members.cc
1093 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1096 AC_MSG_RESULT(IEEE 1003.1)
1098 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1099 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1100 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1101 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1102 CCOLLATE_CC=config/locale/generic/collate_members.cc
1103 CCTYPE_CC=config/locale/generic/ctype_members.cc
1104 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1105 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1106 CMONEY_CC=config/locale/generic/monetary_members.cc
1107 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1108 CTIME_H=config/locale/generic/time_members.h
1109 CTIME_CC=config/locale/generic/time_members.cc
1110 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1114 # This is where the testsuite looks for locale catalogs, using the
1115 # -DLOCALEDIR define during testsuite compilation.
1116 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1117 AC_SUBST(glibcxx_localedir)
1119 # A standalone libintl (e.g., GNU libintl) may be in use.
1120 if test $USE_NLS = yes; then
1121 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1122 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1124 if test $USE_NLS = yes; then
1125 AC_DEFINE(_GLIBCXX_USE_NLS)
1130 AC_SUBST(CCODECVT_H)
1131 AC_SUBST(CMESSAGES_H)
1132 AC_SUBST(CCODECVT_CC)
1133 AC_SUBST(CCOLLATE_CC)
1135 AC_SUBST(CMESSAGES_CC)
1137 AC_SUBST(CNUMERIC_CC)
1140 AC_SUBST(CLOCALE_CC)
1141 AC_SUBST(CLOCALE_INTERNAL_H)
1146 dnl Check for which std::allocator base class to use. The choice is
1147 dnl mapped from a subdirectory of include/ext.
1151 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1152 AC_MSG_CHECKING([for std::allocator base class to use])
1153 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1154 [use KIND for target std::allocator base],
1155 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1156 # If they didn't use this option switch, or if they specified --enable
1157 # with no specific model, we'll have to look for one. If they
1158 # specified --disable (???), do likewise.
1159 if test $enable_libstdcxx_allocator = no || test $enable_libstdcxx_allocator = yes; then
1160 enable_libstdcxx_allocator=auto
1163 # Either a known package, or "auto"
1164 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1166 # Probe for host-specific support if no specific model is specified.
1168 if test $enable_libstdcxx_allocator_flag = auto; then
1169 case ${target_os} in
1171 enable_libstdcxx_allocator_flag=new
1175 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1178 # Set configure bits for specified locale package
1179 case ${enable_libstdcxx_allocator_flag} in
1181 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1182 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1185 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1186 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1189 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1190 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1193 ALLOCATOR_H=config/allocator/new_allocator_base.h
1194 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1197 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1198 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1202 AC_SUBST(ALLOCATOR_H)
1203 AC_SUBST(ALLOCATOR_NAME)
1208 dnl Check for whether the Boost-derived checks should be turned on.
1210 dnl --enable-concept-checks turns them on.
1211 dnl --disable-concept-checks leaves them off.
1212 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1213 dnl Where DEFAULT is either `yes' or `no'.
1215 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1216 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1217 if test $enable_concept_checks = yes; then
1218 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1224 dnl Check for which I/O library to use: stdio, or something specific.
1226 dnl Default is stdio.
1228 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1229 AC_MSG_CHECKING([for underlying I/O to use])
1230 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1231 [use target-specific I/O package], [permit stdio])
1233 # Now that libio has been removed, you can have any color you want as long
1234 # as it's black. This is one big no-op until other packages are added, but
1235 # showing the framework never hurts.
1236 case ${enable_cstdio} in
1238 CSTDIO_H=config/io/c_io_stdio.h
1239 BASIC_FILE_H=config/io/basic_file_stdio.h
1240 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1241 AC_MSG_RESULT(stdio)
1246 AC_SUBST(BASIC_FILE_H)
1247 AC_SUBST(BASIC_FILE_CC)
1252 dnl Check for "unusual" flags to pass to the compiler while building.
1254 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1255 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1256 dnl --disable-cxx-flags passes nothing.
1257 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1258 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1259 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1260 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1261 dnl If "default flags" is an empty string, the effect is the same
1262 dnl as --disable or --enable=no.
1264 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1265 AC_MSG_CHECKING([for extra compiler flags for building])
1266 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1267 [pass compiler FLAGS when building library],
1268 [case "x$enable_cxx_flags" in
1269 xno | x) enable_cxx_flags= ;;
1271 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1274 # Run through flags (either default or command-line) and set anything
1275 # extra (e.g., #defines) that must accompany particular g++ options.
1276 if test -n "$enable_cxx_flags"; then
1277 for f in $enable_cxx_flags; do
1281 *) # and we're trying to pass /what/ exactly?
1282 AC_MSG_ERROR([compiler flags start with a -]) ;;
1287 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1288 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1289 AC_SUBST(EXTRA_CXX_FLAGS)
1294 dnl Check for wide character support. Has the same effect as the option
1295 dnl in gcc's configure, but in a form that autoconf can mess with.
1297 dnl --enable-c-mbchar requests all the wchar_t stuff.
1298 dnl --disable-c-mbchar doesn't.
1299 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1300 dnl Where DEFAULT is either `yes' or `no'.
1302 AC_DEFUN([GLIBCXX_ENABLE_C_MBCHAR], [
1303 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1304 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1309 dnl Check to see if debugging libraries are to be built.
1311 dnl --enable-libstdcxx-debug
1312 dnl builds a separate set of debugging libraries in addition to the
1313 dnl normal (shared, static) libstdc++ binaries.
1315 dnl --disable-libstdcxx-debug
1316 dnl builds only one (non-debug) version of libstdc++.
1318 dnl --enable-libstdcxx-debug-flags=FLAGS
1319 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1321 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1322 dnl Where DEFAULT is either `yes' or `no'.
1324 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1325 AC_MSG_CHECKING([for additional debug build])
1326 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1327 AC_MSG_RESULT($enable_libstdcxx_debug)
1328 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1333 dnl Check for explicit debug flags.
1335 dnl --enable-libstdcxx-debug-flags='-O1'
1336 dnl is a general method for passing flags to be used when
1337 dnl building debug libraries with --enable-debug.
1339 dnl --disable-libstdcxx-debug-flags does nothing.
1340 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1341 dnl If "default flags" is an empty string, the effect is the same
1342 dnl as --disable or --enable=no.
1344 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1345 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1346 [pass compiler FLAGS when building debug library],
1347 [case "x$enable_libstdcxx_debug_flags" in
1348 xno | x) enable_libstdcxx_debug_flags= ;;
1350 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1353 # Option parsed, now set things appropriately
1354 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1355 AC_SUBST(DEBUG_FLAGS)
1357 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1362 dnl Check if the user only wants a freestanding library implementation.
1364 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1365 dnl installing only the headers required by [17.4.1.3] and the language
1366 dnl support library. More than that will be built (to keep the Makefiles
1367 dnl conveniently clean), but not installed.
1370 dnl is_hosted (yes/no)
1373 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1375 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1376 AC_ARG_ENABLE([hosted-libstdcxx],
1377 AC_HELP_STRING([--disable-hosted-libstdcxx],
1378 [only build freestanding C++ runtime support]),,
1379 [enable_hosted_libstdcxx=yes])
1380 if test "$enable_hosted_libstdcxx" = no; then
1381 AC_MSG_NOTICE([Only freestanding libraries will be built])
1385 enable_libstdcxx_pch=no
1390 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1391 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1392 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1397 dnl Check for template specializations for the 'long long' type extension.
1398 dnl The result determines only whether 'long long' I/O is enabled; things
1399 dnl like numeric_limits<> specializations are always available.
1401 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1402 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1403 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1404 dnl Where DEFAULT is either `yes' or `no'.
1406 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1407 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1408 if test $enable_long_long = yes; then
1409 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1415 dnl Check to see if building and using a C++ precompiled header can be done.
1417 dnl --enable-libstdcxx-pch=yes
1418 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1419 dnl may work, after some light-hearted attempts to puzzle out compiler
1420 dnl support, flip bits on in include/Makefile.am
1422 dnl --disable-libstdcxx-pch
1423 dnl turns off attempts to use or build stdc++.h.gch.
1426 dnl glibcxx_PCHFLAGS
1428 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1429 AC_MSG_CHECKING([for enabled PCH])
1430 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1431 AC_MSG_RESULT([$enable_libstdcxx_pch])
1433 if test $enable_libstdcxx_pch = yes; then
1434 AC_CACHE_CHECK([for compiler with PCH support],
1435 [glibcxx_cv_prog_CXX_pch],
1436 [ac_save_CXXFLAGS="$CXXFLAGS"
1437 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1440 echo '#include <math.h>' > conftest.h
1441 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1442 -o conftest.h.gch 1>&5 2>&1 &&
1443 echo '#error "pch failed"' > conftest.h &&
1444 echo '#include "conftest.h"' > conftest.cc &&
1445 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1447 glibcxx_cv_prog_CXX_pch=yes
1449 glibcxx_cv_prog_CXX_pch=no
1452 CXXFLAGS=$ac_save_CXXFLAGS
1455 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1458 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1459 if test $enable_libstdcxx_pch = yes; then
1460 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1464 AC_SUBST(glibcxx_PCHFLAGS)
1469 dnl Check for exception handling support. If an explicit enable/disable
1470 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1471 dnl target may or may not support call frame exceptions.
1473 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1474 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1475 dnl Neither one forces an attempt at detection.
1478 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1480 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1481 AC_MSG_CHECKING([for exception model to use])
1484 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1485 [force use of builtin_setjmp for exceptions],
1486 [permit yes|no|auto])
1488 if test $enable_sjlj_exceptions = auto; then
1489 # Botheration. Now we've got to detect the exception model. Link tests
1490 # against libgcc.a are problematic since we've not been given proper -L
1491 # bits for single-tree newlib and libgloss.
1493 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1494 cat > conftest.$ac_ext << EOF
1495 [#]line __oline__ "configure"
1504 old_CXXFLAGS="$CXXFLAGS"
1506 if AC_TRY_EVAL(ac_compile); then
1507 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1508 enable_sjlj_exceptions=yes
1509 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1510 enable_sjlj_exceptions=no
1513 CXXFLAGS="$old_CXXFLAGS"
1517 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1518 # to two different models.
1519 case $enable_sjlj_exceptions in
1521 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1522 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1523 ac_exception_model_name=sjlj
1526 ac_exception_model_name="call frame"
1529 AC_MSG_ERROR([unable to detect exception model])
1533 AC_MSG_RESULT($ac_exception_model_name)
1538 dnl Add version tags to symbols in shared library (or not), additionally
1539 dnl marking other symbols as private/local (or not).
1541 dnl --enable-symvers=style adds a version script to the linker call when
1542 dnl creating the shared library. The choice of version script is
1543 dnl controlled by 'style'.
1544 dnl --disable-symvers does not.
1545 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1546 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1547 dnl choose a default style based on linker characteristics. Passing
1548 dnl 'no' disables versioning.
1550 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1552 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1553 [enables symbol versioning of the shared library],
1554 [permit yes|no|gnu])
1556 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1557 # don't know enough about $LD to do tricks...
1558 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1559 # FIXME The following test is too strict, in theory.
1560 if test $enable_shared = no ||
1562 test x$glibcxx_gnu_ld_version = x; then
1566 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1567 if test $enable_symvers != no; then
1568 AC_MSG_CHECKING([for shared libgcc])
1569 ac_save_CFLAGS="$CFLAGS"
1571 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1572 CFLAGS="$ac_save_CFLAGS"
1573 AC_MSG_RESULT($glibcxx_shared_libgcc)
1576 # For GNU ld, we need at least this version. The format is described in
1577 # GLIBCXX_CHECK_LINKER_FEATURES above.
1578 glibcxx_min_gnu_ld_version=21400
1579 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1581 # Check to see if unspecified "yes" value can win, given results above.
1582 # Change "yes" into either "no" or a style name.
1583 if test $enable_symvers = yes; then
1584 if test $with_gnu_ld = yes &&
1585 test $glibcxx_shared_libgcc = yes;
1587 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1590 # The right tools, the right setup, but too old. Fallbacks?
1591 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1592 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1593 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1594 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1595 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1596 # Globbing fix is present, proper block support is not.
1597 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1598 dnl enable_symvers=???
1599 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1603 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1609 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1610 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1611 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1612 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1617 # Everything parsed; figure out what file to use.
1618 case $enable_symvers in
1620 SYMVER_MAP=config/linker-map.dummy
1623 SYMVER_MAP=config/linker-map.gnu
1624 AC_DEFINE(_GLIBCXX_SYMVER)
1628 AC_SUBST(SYMVER_MAP)
1629 AC_SUBST(port_specific_symbol_files)
1630 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1631 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1636 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1637 dnl We must stage the required headers so that they will be installed
1638 dnl with the library (unlike libgcc, the STL implementation is provided
1639 dnl solely within headers). Since we must not inject random user-space
1640 dnl macro names into user-provided C++ code, we first stage into <file>-in
1641 dnl and process to <file> with an output command. The reason for a two-
1642 dnl stage process here is to correctly handle $srcdir!=$objdir without
1643 dnl having to write complex code (the sed commands to clean the macro
1644 dnl namespace are complex and fragile enough as it is). We must also
1645 dnl add a relative path so that -I- is supported properly.
1648 dnl glibcxx_thread_h
1651 dnl HAVE_GTHR_DEFAULT
1653 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1654 AC_MSG_CHECKING([for thread model used by GCC])
1655 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1656 AC_MSG_RESULT([$target_thread_file])
1658 if test $target_thread_file != single; then
1659 AC_DEFINE(HAVE_GTHR_DEFAULT)
1662 glibcxx_thread_h=gthr-$target_thread_file.h
1663 AC_SUBST(glibcxx_thread_h)
1667 # Check whether LC_MESSAGES is available in <locale.h>.
1668 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1670 # This file file be copied and used freely without restrictions. It can
1671 # be used in projects which are not available under the GNU Public License
1672 # but which still want to provide support for the GNU gettext functionality.
1673 # Please note that the actual code is *not* freely available.
1676 AC_DEFUN([AC_LC_MESSAGES], [
1677 AC_CHECK_HEADER(locale.h, [
1678 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1679 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1680 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1681 if test $ac_cv_val_LC_MESSAGES = yes; then
1682 AC_DEFINE(HAVE_LC_MESSAGES)
1688 sinclude([../libtool.m4])
1689 dnl The lines below arrange for aclocal not to bring an installed
1690 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1691 dnl add a definition of LIBTOOL to Makefile.in.
1692 ifelse(,,,[AC_SUBST(LIBTOOL)
1693 AC_DEFUN([AM_PROG_LIBTOOL])
1694 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1695 AC_DEFUN([AC_PROG_LD])
1698 dnl vim:et:ts=2:sw=2