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
986 linux* | gnu* | kfreebsd*-gnu | knetbsd*-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 $enable_clocale_flag = gnu; 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])
1157 # If they didn't use this option switch, or if they specified --enable
1158 # with no specific model, we'll have to look for one. If they
1159 # specified --disable (???), do likewise.
1160 if test $enable_libstdcxx_allocator = no ||
1161 test $enable_libstdcxx_allocator = yes;
1163 enable_libstdcxx_allocator=auto
1166 # Either a known package, or "auto". Auto implies the default choice
1167 # for a particular platform.
1168 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1170 # Probe for host-specific support if no specific model is specified.
1172 if test $enable_libstdcxx_allocator_flag = auto; then
1173 case ${target_os} in
1174 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1175 enable_libstdcxx_allocator_flag=mt
1178 enable_libstdcxx_allocator_flag=new
1182 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1185 # Set configure bits for specified locale package
1186 case ${enable_libstdcxx_allocator_flag} in
1188 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1189 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1192 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1193 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1196 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1197 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1200 ALLOCATOR_H=config/allocator/new_allocator_base.h
1201 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1204 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1205 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1209 AC_SUBST(ALLOCATOR_H)
1210 AC_SUBST(ALLOCATOR_NAME)
1215 dnl Check for whether the Boost-derived checks should be turned on.
1217 dnl --enable-concept-checks turns them on.
1218 dnl --disable-concept-checks leaves them off.
1219 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1220 dnl Where DEFAULT is either `yes' or `no'.
1222 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1223 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1224 if test $enable_concept_checks = yes; then
1225 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1231 dnl Check for which I/O library to use: stdio, or something specific.
1233 dnl Default is stdio.
1235 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1236 AC_MSG_CHECKING([for underlying I/O to use])
1237 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1238 [use target-specific I/O package], [permit stdio])
1240 # Now that libio has been removed, you can have any color you want as long
1241 # as it's black. This is one big no-op until other packages are added, but
1242 # showing the framework never hurts.
1243 case ${enable_cstdio} in
1245 CSTDIO_H=config/io/c_io_stdio.h
1246 BASIC_FILE_H=config/io/basic_file_stdio.h
1247 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1248 AC_MSG_RESULT(stdio)
1253 AC_SUBST(BASIC_FILE_H)
1254 AC_SUBST(BASIC_FILE_CC)
1259 dnl Check for "unusual" flags to pass to the compiler while building.
1261 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1262 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1263 dnl --disable-cxx-flags passes nothing.
1264 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1265 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1266 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1267 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1268 dnl If "default flags" is an empty string, the effect is the same
1269 dnl as --disable or --enable=no.
1271 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1272 AC_MSG_CHECKING([for extra compiler flags for building])
1273 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1274 [pass compiler FLAGS when building library],
1275 [case "x$enable_cxx_flags" in
1276 xno | x) enable_cxx_flags= ;;
1278 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1281 # Run through flags (either default or command-line) and set anything
1282 # extra (e.g., #defines) that must accompany particular g++ options.
1283 if test -n "$enable_cxx_flags"; then
1284 for f in $enable_cxx_flags; do
1288 *) # and we're trying to pass /what/ exactly?
1289 AC_MSG_ERROR([compiler flags start with a -]) ;;
1294 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1295 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1296 AC_SUBST(EXTRA_CXX_FLAGS)
1301 dnl Check for wide character support. Has the same effect as the option
1302 dnl in gcc's configure, but in a form that autoconf can mess with.
1304 dnl --enable-c-mbchar requests all the wchar_t stuff.
1305 dnl --disable-c-mbchar doesn't.
1306 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1307 dnl Where DEFAULT is either `yes' or `no'.
1309 AC_DEFUN([GLIBCXX_ENABLE_C_MBCHAR], [
1310 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1311 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1316 dnl Check to see if debugging libraries are to be built.
1318 dnl --enable-libstdcxx-debug
1319 dnl builds a separate set of debugging libraries in addition to the
1320 dnl normal (shared, static) libstdc++ binaries.
1322 dnl --disable-libstdcxx-debug
1323 dnl builds only one (non-debug) version of libstdc++.
1325 dnl --enable-libstdcxx-debug-flags=FLAGS
1326 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1328 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1329 dnl Where DEFAULT is either `yes' or `no'.
1331 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1332 AC_MSG_CHECKING([for additional debug build])
1333 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1334 AC_MSG_RESULT($enable_libstdcxx_debug)
1335 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1340 dnl Check for explicit debug flags.
1342 dnl --enable-libstdcxx-debug-flags='-O1'
1343 dnl is a general method for passing flags to be used when
1344 dnl building debug libraries with --enable-debug.
1346 dnl --disable-libstdcxx-debug-flags does nothing.
1347 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1348 dnl If "default flags" is an empty string, the effect is the same
1349 dnl as --disable or --enable=no.
1351 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1352 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1353 [pass compiler FLAGS when building debug library],
1354 [case "x$enable_libstdcxx_debug_flags" in
1355 xno | x) enable_libstdcxx_debug_flags= ;;
1357 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1360 # Option parsed, now set things appropriately
1361 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1362 AC_SUBST(DEBUG_FLAGS)
1364 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1369 dnl Check if the user only wants a freestanding library implementation.
1371 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1372 dnl installing only the headers required by [17.4.1.3] and the language
1373 dnl support library. More than that will be built (to keep the Makefiles
1374 dnl conveniently clean), but not installed.
1377 dnl is_hosted (yes/no)
1380 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1382 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1383 AC_ARG_ENABLE([hosted-libstdcxx],
1384 AC_HELP_STRING([--disable-hosted-libstdcxx],
1385 [only build freestanding C++ runtime support]),,
1388 enable_hosted_libstdcxx=no
1391 enable_hosted_libstdcxx=yes
1394 if test "$enable_hosted_libstdcxx" = no; then
1395 AC_MSG_NOTICE([Only freestanding libraries will be built])
1399 enable_libstdcxx_pch=no
1404 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1405 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1406 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1411 dnl Check for template specializations for the 'long long' type extension.
1412 dnl The result determines only whether 'long long' I/O is enabled; things
1413 dnl like numeric_limits<> specializations are always available.
1415 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1416 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1417 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1418 dnl Where DEFAULT is either `yes' or `no'.
1420 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1421 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1422 if test $enable_long_long = yes; then
1423 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1429 dnl Check to see if building and using a C++ precompiled header can be done.
1431 dnl --enable-libstdcxx-pch=yes
1432 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1433 dnl may work, after some light-hearted attempts to puzzle out compiler
1434 dnl support, flip bits on in include/Makefile.am
1436 dnl --disable-libstdcxx-pch
1437 dnl turns off attempts to use or build stdc++.h.gch.
1440 dnl glibcxx_PCHFLAGS
1442 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1443 AC_MSG_CHECKING([for enabled PCH])
1444 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1445 AC_MSG_RESULT([$enable_libstdcxx_pch])
1447 if test $enable_libstdcxx_pch = yes; then
1448 AC_CACHE_CHECK([for compiler with PCH support],
1449 [glibcxx_cv_prog_CXX_pch],
1450 [ac_save_CXXFLAGS="$CXXFLAGS"
1451 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1454 echo '#include <math.h>' > conftest.h
1455 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1456 -o conftest.h.gch 1>&5 2>&1 &&
1457 echo '#error "pch failed"' > conftest.h &&
1458 echo '#include "conftest.h"' > conftest.cc &&
1459 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1461 glibcxx_cv_prog_CXX_pch=yes
1463 glibcxx_cv_prog_CXX_pch=no
1466 CXXFLAGS=$ac_save_CXXFLAGS
1469 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1472 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1473 if test $enable_libstdcxx_pch = yes; then
1474 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1478 AC_SUBST(glibcxx_PCHFLAGS)
1483 dnl Check for exception handling support. If an explicit enable/disable
1484 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1485 dnl target may or may not support call frame exceptions.
1487 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1488 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1489 dnl Neither one forces an attempt at detection.
1492 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1494 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1495 AC_MSG_CHECKING([for exception model to use])
1498 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1499 [force use of builtin_setjmp for exceptions],
1500 [permit yes|no|auto])
1502 if test $enable_sjlj_exceptions = auto; then
1503 # Botheration. Now we've got to detect the exception model. Link tests
1504 # against libgcc.a are problematic since we've not been given proper -L
1505 # bits for single-tree newlib and libgloss.
1507 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1508 cat > conftest.$ac_ext << EOF
1509 [#]line __oline__ "configure"
1518 old_CXXFLAGS="$CXXFLAGS"
1520 if AC_TRY_EVAL(ac_compile); then
1521 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1522 enable_sjlj_exceptions=yes
1523 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1524 enable_sjlj_exceptions=no
1527 CXXFLAGS="$old_CXXFLAGS"
1531 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1532 # to two different models.
1533 case $enable_sjlj_exceptions in
1535 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1536 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1537 ac_exception_model_name=sjlj
1540 ac_exception_model_name="call frame"
1543 AC_MSG_ERROR([unable to detect exception model])
1547 AC_MSG_RESULT($ac_exception_model_name)
1552 dnl Add version tags to symbols in shared library (or not), additionally
1553 dnl marking other symbols as private/local (or not).
1555 dnl --enable-symvers=style adds a version script to the linker call when
1556 dnl creating the shared library. The choice of version script is
1557 dnl controlled by 'style'.
1558 dnl --disable-symvers does not.
1559 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1560 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1561 dnl choose a default style based on linker characteristics. Passing
1562 dnl 'no' disables versioning.
1564 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1566 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1567 [enables symbol versioning of the shared library],
1568 [permit yes|no|gnu])
1570 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1571 # don't know enough about $LD to do tricks...
1572 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1573 # FIXME The following test is too strict, in theory.
1574 if test $enable_shared = no ||
1576 test x$glibcxx_gnu_ld_version = x; then
1580 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1581 if test $enable_symvers != no; then
1582 AC_MSG_CHECKING([for shared libgcc])
1583 ac_save_CFLAGS="$CFLAGS"
1585 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1586 CFLAGS="$ac_save_CFLAGS"
1587 if test $glibcxx_shared_libgcc = no; then
1588 cat > conftest.c <<EOF
1589 int main (void) { return 0; }
1592 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1593 -shared -shared-libgcc -o conftest.so \
1594 conftest.c -v 2>&1 >/dev/null \
1595 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1597 rm -f conftest.c conftest.so
1598 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1599 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1600 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1601 CFLAGS="$ac_save_CFLAGS"
1604 AC_MSG_RESULT($glibcxx_shared_libgcc)
1607 # For GNU ld, we need at least this version. The format is described in
1608 # GLIBCXX_CHECK_LINKER_FEATURES above.
1609 glibcxx_min_gnu_ld_version=21400
1610 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1612 # Check to see if unspecified "yes" value can win, given results above.
1613 # Change "yes" into either "no" or a style name.
1614 if test $enable_symvers = yes; then
1615 if test $with_gnu_ld = yes &&
1616 test $glibcxx_shared_libgcc = yes;
1618 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1621 # The right tools, the right setup, but too old. Fallbacks?
1622 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1623 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1624 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1625 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1626 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1627 # Globbing fix is present, proper block support is not.
1628 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1629 dnl enable_symvers=???
1630 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1634 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1640 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1641 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1642 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1643 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1648 # Everything parsed; figure out what file to use.
1649 case $enable_symvers in
1651 SYMVER_MAP=config/linker-map.dummy
1654 SYMVER_MAP=config/linker-map.gnu
1655 AC_DEFINE(_GLIBCXX_SYMVER)
1659 AC_SUBST(SYMVER_MAP)
1660 AC_SUBST(port_specific_symbol_files)
1661 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1662 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1667 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1668 dnl We must stage the required headers so that they will be installed
1669 dnl with the library (unlike libgcc, the STL implementation is provided
1670 dnl solely within headers). Since we must not inject random user-space
1671 dnl macro names into user-provided C++ code, we first stage into <file>-in
1672 dnl and process to <file> with an output command. The reason for a two-
1673 dnl stage process here is to correctly handle $srcdir!=$objdir without
1674 dnl having to write complex code (the sed commands to clean the macro
1675 dnl namespace are complex and fragile enough as it is). We must also
1676 dnl add a relative path so that -I- is supported properly.
1679 dnl glibcxx_thread_h
1682 dnl HAVE_GTHR_DEFAULT
1684 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1685 AC_MSG_CHECKING([for thread model used by GCC])
1686 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1687 AC_MSG_RESULT([$target_thread_file])
1689 if test $target_thread_file != single; then
1690 AC_DEFINE(HAVE_GTHR_DEFAULT)
1693 glibcxx_thread_h=gthr-$target_thread_file.h
1694 AC_SUBST(glibcxx_thread_h)
1698 # Check whether LC_MESSAGES is available in <locale.h>.
1699 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1701 # This file file be copied and used freely without restrictions. It can
1702 # be used in projects which are not available under the GNU Public License
1703 # but which still want to provide support for the GNU gettext functionality.
1704 # Please note that the actual code is *not* freely available.
1707 AC_DEFUN([AC_LC_MESSAGES], [
1708 AC_CHECK_HEADER(locale.h, [
1709 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1710 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1711 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1712 if test $ac_cv_val_LC_MESSAGES = yes; then
1713 AC_DEFINE(HAVE_LC_MESSAGES)
1719 sinclude([../libtool.m4])
1720 dnl The lines below arrange for aclocal not to bring an installed
1721 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1722 dnl add a definition of LIBTOOL to Makefile.in.
1723 ifelse(,,,[AC_SUBST(LIBTOOL)
1724 AC_DEFUN([AM_PROG_LIBTOOL])
1725 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1726 AC_DEFUN([AC_PROG_LD])
1729 dnl vim:et:ts=2:sw=2