3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
6 dnl end of configure. This lets tested variables be reassigned, and the
7 dnl conditional will depend on the final state of the variable. For a simple
8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
11 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
12 m4_divert_text([glibcxx_diversion],dnl
13 AM_CONDITIONAL([$1],[$2])
16 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
20 dnl Check to see what architecture and operating system we are compiling
21 dnl for. Also, if architecture- or OS-specific flags are required for
22 dnl compilation, pick them up here.
24 AC_DEFUN([GLIBCXX_CHECK_HOST], [
25 . $glibcxx_srcdir/configure.host
26 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
27 AC_MSG_NOTICE([OS config directory is $os_include_dir])
31 dnl Initialize the rest of the library configury. At this point we have
32 dnl variables like $host.
35 dnl gcc_version (x.y.z format)
38 dnl glibcxx_builddir (absolute path)
39 dnl glibcxx_srcdir (absolute path)
40 dnl toplevel_srcdir (absolute path)
43 dnl with_target_subdir
45 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
46 dnl - default settings for all AM_CONFITIONAL test variables
47 dnl - lots of tools, like CC and CXX
49 AC_DEFUN([GLIBCXX_CONFIGURE], [
50 # Keep these sync'd with the list in Makefile.am. The first provides an
51 # expandable list at autoconf time; the second provides an expandable list
52 # (i.e., shell variable) at configure time.
53 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
54 SUBDIRS='glibcxx_SUBDIRS'
56 # These need to be absolute paths, yet at the same time need to
57 # canonicalize only relative paths, because then amd will not unmount
58 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
59 glibcxx_builddir=`${PWDCMD-pwd}`
61 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
62 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
64 toplevel_srcdir=${glibcxx_srcdir}/..
65 AC_SUBST(glibcxx_builddir)
66 AC_SUBST(glibcxx_srcdir)
67 AC_SUBST(toplevel_srcdir)
69 # We use these options to decide which functions to include. They are
70 # set from the top level.
71 AC_ARG_WITH([target-subdir],
72 AC_HELP_STRING([--with-target-subdir=SUBDIR],
73 [configuring in a subdirectory]))
75 AC_ARG_WITH([cross-host],
76 AC_HELP_STRING([--with-cross-host=HOST],
77 [configuring with a cross compiler]))
80 AC_HELP_STRING([--with-newlib],
81 [assume newlib as a system C library]))
83 # We're almost certainly being configured before anything else which uses
84 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
85 # we not cache the value of CXX that we "discover" here, because it's set
86 # to something unique for us and libjava. Other target libraries need to
87 # find CXX for themselves. We yank the rug out from under the normal AC_*
88 # process by sneakily renaming the cache variable. This also lets us debug
89 # the value of "our" CXX in postmortems.
91 # We must also force CXX to /not/ be a precious variable, otherwise the
92 # wrong (non-multilib-adjusted) value will be used in multilibs. This
93 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
94 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
95 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
97 # -fno-builtin must be present here so that a non-conflicting form of
98 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
100 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
101 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
102 m4_define([_AC_ARG_VAR_PRECIOUS],[])
103 save_CXXFLAGS="$CXXFLAGS"
104 CXXFLAGS="$CXXFLAGS -fno-builtin"
107 CXXFLAGS="$save_CXXFLAGS"
108 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
112 # For directory versioning (e.g., headers) and other variables.
113 AC_MSG_CHECKING([for GCC version number])
114 gcc_version=`$CXX -dumpversion`
115 AC_MSG_RESULT($gcc_version)
117 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
118 # available). Uncomment the next line to force a particular method.
122 AC_CHECK_TOOL(AS, as)
123 AC_CHECK_TOOL(AR, ar)
124 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
128 # Set up safe default values for all subsequent AM_CONDITIONAL tests
129 # which are themselves conditionally expanded.
130 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
131 ## other macros from doing the same. This should be automated.) -pme
134 #enable_libstdcxx_debug=no
135 #enable_libstdcxx_pch=no
140 #enable_hosted_libstdcxx=yes
142 # Find platform-specific directories containing configuration info.
143 # Also possibly modify flags used elsewhere, as needed by the platform.
148 m4_include([linkage.m4])
149 m4_include([../config/no-executables.m4])
153 dnl Tests for newer compiler features, or features that are present in newer
154 dnl compiler versions but not older compiler versions still in use, should
158 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
159 dnl new inlining code or the new system_header pragma will die on -Werror.
160 dnl Leave it out by default and use maint-mode to use it.
161 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
162 dnl compiler supports it and the user has not requested debug mode.
164 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
165 # All these tests are for C++; save the language and the compiler flags.
166 # The CXXFLAGS thing is suspicious, but based on similar bits previously
167 # found in GLIBCXX_CONFIGURE.
170 ac_test_CXXFLAGS="${CXXFLAGS+set}"
171 ac_save_CXXFLAGS="$CXXFLAGS"
173 # Check for maintainer-mode bits.
174 if test x"$USE_MAINTAINER_MODE" = xno; then
180 # Check for -ffunction-sections -fdata-sections
181 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
182 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
183 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
184 if test "$ac_test_CXXFLAGS" = set; then
185 CXXFLAGS="$ac_save_CXXFLAGS"
187 # this is the suspicious part
190 if test x"$ac_fdsections" = x"yes"; then
191 SECTION_FLAGS='-ffunction-sections -fdata-sections'
193 AC_MSG_RESULT($ac_fdsections)
197 AC_SUBST(SECTION_FLAGS)
202 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
203 dnl the native linker is in use, all variables will be defined to something
204 dnl safe (like an empty string).
207 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
208 dnl OPT_LDFLAGS='-Wl,-O1' if possible
209 dnl LD (as a side effect of testing)
212 dnl glibcxx_gnu_ld_version (possibly)
214 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
215 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
217 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
218 # If we're not using GNU ld, then there's no point in even trying these
219 # tests. Check for that first. We should have already tested for gld
220 # by now (in libtool), but require it now just to be safe...
221 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
222 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
223 AC_REQUIRE([AC_PROG_LD])
224 AC_REQUIRE([AC_PROG_AWK])
226 # The name set by libtool depends on the version of libtool. Shame on us
227 # for depending on an impl detail, but c'est la vie. Older versions used
228 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
229 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
230 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
231 # set (hence we're using an older libtool), then set it.
232 if test x${with_gnu_ld+set} != xset; then
233 if test x${ac_cv_prog_gnu_ld+set} != xset; then
234 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
237 with_gnu_ld=$ac_cv_prog_gnu_ld
241 # Start by getting the version number. I think the libtool test already
242 # does some of this, but throws away the result.
244 ldver=`$LD --version 2>/dev/null | head -1 | \
245 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
247 glibcxx_gnu_ld_version=`echo $ldver | \
248 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
251 if test "$with_gnu_ld" = "notbroken"; then
252 # GNU ld it is! Joy and bunny rabbits!
254 # All these tests are for C++; save the language and the compiler flags.
255 # Need to do this so that g++ won't try to link in libstdc++
256 ac_test_CFLAGS="${CFLAGS+set}"
257 ac_save_CFLAGS="$CFLAGS"
258 CFLAGS='-x c++ -Wl,--gc-sections'
260 # Check for -Wl,--gc-sections
261 # XXX This test is broken at the moment, as symbols required for linking
262 # are now in libsupc++ (not built yet). In addition, this test has
263 # cored on solaris in the past. In addition, --gc-sections doesn't
264 # really work at the moment (keeps on discarding used sections, first
265 # .eh_frame and now some of the glibc sections for iconv).
266 # Bzzzzt. Thanks for playing, maybe next time.
267 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
275 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
276 if test "$ac_test_CFLAGS" = set; then
277 CFLAGS="$ac_save_CFLAGS"
279 # this is the suspicious part
282 if test "$ac_sectionLDflags" = "yes"; then
283 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
285 AC_MSG_RESULT($ac_sectionLDflags)
288 # Set linker optimization flags.
289 if test x"$with_gnu_ld" = x"yes"; then
290 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
293 AC_SUBST(SECTION_LDFLAGS)
294 AC_SUBST(OPT_LDFLAGS)
299 dnl Check to see if this target can enable the wchar_t parts.
300 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
301 dnl must have been previously checked.) By default, wide characters are
305 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
306 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
308 dnl LIBICONV to a -l string containing the iconv library, if needed.
310 AC_DEFUN([GLIBCXX_CHECK_WCHAR_T_SUPPORT], [
311 # Test wchar.h for mbstate_t, which is needed for char_traits and
312 # others even if wchar_t support is not on.
313 AC_MSG_CHECKING([for mbstate_t])
314 AC_TRY_COMPILE([#include <wchar.h>],
315 [mbstate_t teststate;],
316 have_mbstate_t=yes, have_mbstate_t=no)
317 AC_MSG_RESULT($have_mbstate_t)
318 if test x"$have_mbstate_t" = xyes; then
319 AC_DEFINE(HAVE_MBSTATE_T)
322 # Sanity check for existence of ISO C99 headers for extended encoding.
323 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
324 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
326 # Only continue checking if the ISO C99 headers exist and support is on.
327 if test x"$ac_has_wchar_h" = xyes &&
328 test x"$ac_has_wctype_h" = xyes &&
329 test x"$enable_c_mbchar" != xno; then
331 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
332 # numeric_limits can instantiate type_traits<wchar_t>
333 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
334 AC_TRY_COMPILE([#include <wchar.h>],
335 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
336 has_wchar_minmax=yes, has_wchar_minmax=no)
337 AC_MSG_RESULT($has_wchar_minmax)
339 # Test wchar.h for WEOF, which is what we use to determine whether
340 # to specialize for char_traits<wchar_t> or not.
341 AC_MSG_CHECKING([for WEOF])
344 #include <stddef.h>],
346 has_weof=yes, has_weof=no)
347 AC_MSG_RESULT($has_weof)
349 # Tests for wide character functions used in char_traits<wchar_t>.
351 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset],
354 # Checks for names injected into std:: by the c_std headers.
355 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \
356 fwprintf fwscanf swprintf swscanf vfwprintf vswprintf \
357 vwprintf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
358 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstol \
359 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
360 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
363 # Checks for wide character functions that are not required
364 # for basic wchar_t support. Don't disable support if they are missing.
365 # Injection of these is wrapped with guard macros.
366 AC_CHECK_FUNCS([vfwscanf vswscanf vwscanf wcstof iswblank],[],[])
368 AC_MSG_CHECKING([for ISO C99 wchar_t support])
369 if test x"$has_weof" = xyes &&
370 test x"$has_wchar_minmax" = xyes &&
371 test x"$ac_wfuncs" = xyes;
373 ac_isoC99_wchar_t=yes
377 AC_MSG_RESULT($ac_isoC99_wchar_t)
379 # Use iconv for wchar_t to char conversions. As such, check for
380 # X/Open Portability Guide, version 2 features (XPG2).
381 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
382 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
384 # Check for existence of libiconv.a providing XPG2 wchar_t support.
385 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
387 LIBS="$LIBS $LIBICONV"
390 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
391 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
395 AC_MSG_CHECKING([for XPG2 wchar_t support])
396 if test x"$ac_has_iconv_h" = xyes &&
397 test x"$ac_has_langinfo_h" = xyes &&
398 test x"$ac_XPG2funcs" = xyes;
404 AC_MSG_RESULT($ac_XPG2_wchar_t)
406 # At the moment, only enable wchar_t specializations if all the
407 # above support is present.
408 if test x"$ac_isoC99_wchar_t" = xyes &&
409 test x"$ac_XPG2_wchar_t" = xyes;
411 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
415 AC_MSG_CHECKING([for enabled wchar_t specializations])
416 AC_MSG_RESULT($enable_wchar_t)
421 dnl Check for headers for, and arguments to, the setrlimit() function.
422 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
425 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
426 dnl various HAVE_LIMIT_* for individual limit names
428 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
431 #include <sys/time.h>
432 #include <sys/resource.h>
434 [ int f = RLIMIT_$1 ; ],
435 [glibcxx_mresult=1], [glibcxx_mresult=0])
436 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
437 [Only used in build directory testsuite_hooks.h.])
440 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
441 setrlimit_have_headers=yes
442 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
444 [setrlimit_have_headers=no])
445 # If don't have the headers, then we can't run the tests now, and we
446 # won't be seeing any of these during testsuite compilation.
447 if test $setrlimit_have_headers = yes; then
448 # Can't do these in a loop, else the resulting syntax is wrong.
449 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
450 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
451 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
452 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
453 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
455 # Check for rlimit, setrlimit.
456 AC_CACHE_VAL(ac_setrlimit, [
459 #include <sys/time.h>
460 #include <sys/resource.h>
464 [ac_setrlimit=yes], [ac_setrlimit=no])
468 AC_MSG_CHECKING([for testsuite resource limits support])
469 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
471 AC_DEFINE(_GLIBCXX_RES_LIMITS)
475 AC_MSG_RESULT($ac_res_limits)
480 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
481 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
483 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
484 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
486 [#include <sys/stat.h>],
489 S_ISREG(buffer.st_mode);],
490 [glibcxx_cv_S_ISREG=yes],
491 [glibcxx_cv_S_ISREG=no])
493 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
495 [#include <sys/stat.h>],
498 S_IFREG & buffer.st_mode;],
499 [glibcxx_cv_S_IFREG=yes],
500 [glibcxx_cv_S_IFREG=no])
502 if test $glibcxx_cv_S_ISREG = yes; then
503 AC_DEFINE(HAVE_S_ISREG)
504 elif test $glibcxx_cv_S_IFREG = yes; then
505 AC_DEFINE(HAVE_S_IFREG)
511 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
513 AC_DEFUN([GLIBCXX_CHECK_POLL], [
514 AC_CACHE_VAL(glibcxx_cv_POLL, [
517 [struct pollfd pfd[1];
518 pfd[0].events = POLLIN;
520 [glibcxx_cv_POLL=yes],
521 [glibcxx_cv_POLL=no])
523 if test $glibcxx_cv_POLL = yes; then
530 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
532 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
533 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
535 [#include <sys/uio.h>],
536 [struct iovec iov[2];
538 [glibcxx_cv_WRITEV=yes],
539 [glibcxx_cv_WRITEV=no])
541 if test $glibcxx_cv_WRITEV = yes; then
542 AC_DEFINE(HAVE_WRITEV)
548 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
550 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
551 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
553 [#include <stdint.h>],
555 [glibcxx_cv_INT64_T=yes],
556 [glibcxx_cv_INT64_T=no])
558 if test $glibcxx_cv_INT64_T = yes; then
559 AC_DEFINE(HAVE_INT64_T)
565 dnl Check whether LFS support is available.
567 AC_DEFUN([GLIBCXX_CHECK_LFS], [
570 ac_save_CXXFLAGS="$CXXFLAGS"
571 CXXFLAGS="$CXXFLAGS -fno-exceptions"
572 AC_CACHE_VAL(glibcxx_cv_LFS, [
576 #include <sys/stat.h>
580 fseeko64(fp, 0, SEEK_CUR);
582 lseek64(1, 0, SEEK_CUR);
585 [glibcxx_cv_LFS=yes],
588 if test $glibcxx_cv_LFS = yes; then
589 AC_DEFINE(_GLIBCXX_USE_LFS)
591 CXXFLAGS="$ac_save_CXXFLAGS"
597 dnl Check for whether a fully dynamic basic_string implementation should
598 dnl be turned on, that does not put empty objects in per-process static
599 dnl memory (mostly useful together with shared memory allocators, see PR
600 dnl libstdc++/16612 for details).
602 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
603 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
604 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
605 dnl Where DEFAULT is either `yes' or `no'.
607 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
608 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
609 if test $enable_fully_dynamic_string = yes; then
610 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING)
616 dnl Does any necessary configuration of the testsuite directory. Generates
617 dnl the testsuite_hooks.h header.
619 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
622 dnl enable_abi_check / GLIBCXX_TEST_ABI
626 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
627 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
628 # Do checks for resource limit functions.
629 GLIBCXX_CHECK_SETRLIMIT
631 # Look for setenv, so that extended locale tests can be performed.
632 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
634 if test $enable_symvers = no; then
639 enable_abi_check=no ;;
641 enable_abi_check=yes ;;
645 # Only build this as native, since automake does not understand
650 # Export file names for ABI checking.
651 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
652 AC_SUBST(baseline_dir)
654 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
655 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
660 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
664 dnl TOPLEVEL_INCLUDES
666 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
667 # Used for every C++ compile we perform.
669 -I$glibcxx_builddir/include/$host_alias \
670 -I$glibcxx_builddir/include \
671 -I$glibcxx_srcdir/libsupc++"
673 # For Canadian crosses, pick this up too.
674 if test $CANADIAN = yes; then
675 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
678 # Stuff in the actual top level. Currently only used by libsupc++ to
679 # get unwind* headers from the gcc dir.
680 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
681 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
683 # Now, export this to all the little Makefiles....
684 AC_SUBST(GLIBCXX_INCLUDES)
685 AC_SUBST(TOPLEVEL_INCLUDES)
690 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
691 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
694 dnl OPTIMIZE_CXXFLAGS
697 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
698 # Optimization flags that are probably a good idea for thrill-seekers. Just
699 # uncomment the lines below and make, everything else is ready to go...
700 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
702 AC_SUBST(OPTIMIZE_CXXFLAGS)
704 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
710 dnl All installation directory information is determined here.
714 dnl glibcxx_prefixdir
715 dnl glibcxx_toolexecdir
716 dnl glibcxx_toolexeclibdir
718 dnl Assumes cross_compiling bits already done, and with_cross_host in
721 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
722 glibcxx_toolexecdir=no
723 glibcxx_toolexeclibdir=no
724 glibcxx_prefixdir=$prefix
726 AC_MSG_CHECKING([for gxx-include-dir])
727 AC_ARG_WITH([gxx-include-dir],
728 AC_HELP_STRING([--with-gxx-include-dir=DIR],
729 [installation directory for include files]),
731 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
732 no) gxx_include_dir=no ;;
733 *) gxx_include_dir=$withval ;;
735 [gxx_include_dir=no])
736 AC_MSG_RESULT($gxx_include_dir)
738 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
739 AC_ARG_ENABLE([version-specific-runtime-libs],
740 AC_HELP_STRING([--enable-version-specific-runtime-libs],
741 [Specify that runtime libraries should be installed in a compiler-specific directory]),
742 [case "$enableval" in
743 yes) version_specific_libs=yes ;;
744 no) version_specific_libs=no ;;
745 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
747 [version_specific_libs=no])
748 AC_MSG_RESULT($version_specific_libs)
750 # Default case for install directory for include files.
751 if test $version_specific_libs = no && test $gxx_include_dir = no; then
752 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
755 # Version-specific runtime libs processing.
756 if test $version_specific_libs = yes; then
757 # Need the gcc compiler version to know where to install libraries
758 # and header files if --enable-version-specific-runtime-libs option
759 # is selected. FIXME: these variables are misnamed, there are
760 # no executables installed in _toolexecdir or _toolexeclibdir.
761 if test x"$gxx_include_dir" = x"no"; then
762 gxx_include_dir='${libdir}/gcc/${host_alias}/'$gcc_version/include/c++
764 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
765 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
768 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
769 # Install a library built with a cross compiler in tooldir, not libdir.
770 if test x"$glibcxx_toolexecdir" = x"no"; then
771 if test -n "$with_cross_host" &&
772 test x"$with_cross_host" != x"no"; then
773 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
774 glibcxx_toolexeclibdir='${toolexecdir}/lib'
776 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
777 glibcxx_toolexeclibdir='${libdir}'
779 multi_os_directory=`$CXX -print-multi-os-directory`
780 case $multi_os_directory in
781 .) ;; # Avoid trailing /.
782 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
786 AC_MSG_CHECKING([for install location])
787 AC_MSG_RESULT($gxx_include_dir)
789 AC_SUBST(glibcxx_prefixdir)
790 AC_SUBST(gxx_include_dir)
791 AC_SUBST(glibcxx_toolexecdir)
792 AC_SUBST(glibcxx_toolexeclibdir)
798 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
799 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
800 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
802 dnl See docs/html/17_intro/configury.html#enable for documentation.
804 m4_define([GLIBCXX_ENABLE],[dnl
805 m4_define([_g_switch],[--enable-$1])dnl
806 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
807 AC_ARG_ENABLE($1,_g_help,
812 m4_bpatsubst([$5],[permit ])) ;;
813 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
814 dnl Idea for future: generate a URL pointing to
815 dnl "onlinedocs/configopts.html#whatever"
822 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
826 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
827 m4_undefine([_g_switch])dnl
828 m4_undefine([_g_help])dnl
833 dnl Check for ISO/IEC 9899:1999 "C99" support.
835 dnl --enable-c99 defines _GLIBCXX_USE_C99
836 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
837 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
838 dnl Where DEFAULT is either `yes' or `no'.
839 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
841 AC_DEFUN([GLIBCXX_ENABLE_C99], [
842 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
847 # Check for the existence of <math.h> functions used if C99 is enabled.
849 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
850 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
851 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
852 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
853 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
854 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
855 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
856 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
857 AC_TRY_COMPILE([#include <math.h>],
858 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
859 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
860 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
861 AC_TRY_COMPILE([#include <math.h>],
862 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
863 AC_TRY_COMPILE([#include <math.h>],
864 [isunordered(0.0,0.0);],, [ac_c99_math=no])
865 AC_MSG_RESULT($ac_c99_math)
867 if test x"$ac_c99_math" = x"yes"; then
868 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
871 # Check for the existence in <stdio.h> of vscanf, et. al.
873 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
874 AC_TRY_COMPILE([#include <stdio.h>],
875 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
876 AC_TRY_COMPILE([#include <stdio.h>
878 void foo(char* fmt, ...)
879 {va_list args; va_start(args, fmt);
880 vfscanf(stderr, "%i", args);}],
881 [],, [ac_c99_stdio=no])
882 AC_TRY_COMPILE([#include <stdio.h>
884 void foo(char* fmt, ...)
885 {va_list args; va_start(args, fmt);
886 vscanf("%i", args);}],
887 [],, [ac_c99_stdio=no])
888 AC_TRY_COMPILE([#include <stdio.h>
890 void foo(char* fmt, ...)
891 {va_list args; va_start(args, fmt);
892 vsnprintf(fmt, 0, "%i", args);}],
893 [],, [ac_c99_stdio=no])
894 AC_TRY_COMPILE([#include <stdio.h>
896 void foo(char* fmt, ...)
897 {va_list args; va_start(args, fmt);
898 vsscanf(fmt, "%i", args);}],
899 [],, [ac_c99_stdio=no])
900 AC_MSG_RESULT($ac_c99_stdio)
902 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
904 AC_MSG_CHECKING([for lldiv_t declaration])
905 AC_CACHE_VAL(ac_c99_lldiv_t, [
906 AC_TRY_COMPILE([#include <stdlib.h>],
908 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
910 AC_MSG_RESULT($ac_c99_lldiv_t)
912 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
913 AC_TRY_COMPILE([#include <stdlib.h>],
914 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
915 AC_TRY_COMPILE([#include <stdlib.h>],
916 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
917 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
918 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
919 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
920 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
921 if test x"$ac_c99_lldiv_t" = x"no"; then
924 AC_MSG_RESULT($ac_c99_stdlib)
926 # Check for the existence of <wchar.h> functions used if C99 is enabled.
927 # XXX the wchar.h checks should be rolled into the general C99 bits.
929 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
930 AC_TRY_COMPILE([#include <wchar.h>],
931 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
932 AC_TRY_COMPILE([#include <wchar.h>],
933 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
934 AC_TRY_COMPILE([#include <wchar.h>],
935 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
936 AC_MSG_RESULT($ac_c99_wchar)
938 AC_MSG_CHECKING([for enabled ISO C99 support])
939 if test x"$ac_c99_math" = x"no" ||
940 test x"$ac_c99_stdio" = x"no" ||
941 test x"$ac_c99_stdlib" = x"no" ||
942 test x"$ac_c99_wchar" = x"no"; then
945 AC_MSG_RESULT($enable_c99)
947 if test x"$ac_99_math" = x"yes"; then
948 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
951 # Option parsed, now set things appropriately
952 if test x"$enable_c99" = x"yes"; then
953 AC_DEFINE(_GLIBCXX_USE_C99)
961 dnl Check for what type of C headers to use.
963 dnl --enable-cheaders= [does stuff].
964 dnl --disable-cheaders [does not do anything, really].
965 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
966 dnl Where DEFAULT is either `c' or `c_std'.
968 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
969 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
970 [construct "C" headers for g++], [permit c|c_std])
971 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
973 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
975 AC_SUBST(C_INCLUDE_DIR)
976 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
977 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
978 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
983 dnl Check for which locale library to use. The choice is mapped to
984 dnl a subdirectory of config/locale.
986 dnl Default is generic.
988 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
989 AC_MSG_CHECKING([for C locale to use])
990 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
991 [use MODEL for target locale package],
992 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
994 # If they didn't use this option switch, or if they specified --enable
995 # with no specific model, we'll have to look for one. If they
996 # specified --disable (???), do likewise.
997 if test $enable_clocale = no || test $enable_clocale = yes; then
1001 # Either a known package, or "auto"
1002 enable_clocale_flag=$enable_clocale
1004 # Probe for locale support if no specific model is specified.
1005 # Default to "generic".
1006 if test $enable_clocale_flag = auto; then
1007 case ${target_os} in
1008 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1009 AC_EGREP_CPP([_GLIBCXX_ok], [
1010 #include <features.h>
1011 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1014 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1016 # Test for bugs early in glibc-2.2.x series
1017 if test $enable_clocale_flag = gnu; then
1019 #define _GNU_SOURCE 1
1022 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1023 extern __typeof(newlocale) __newlocale;
1024 extern __typeof(duplocale) __duplocale;
1025 extern __typeof(strcoll_l) __strcoll_l;
1029 const char __one[] = "Äuglein Augmen";
1030 const char __two[] = "Äuglein";
1035 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1036 loc_dup = __duplocale(loc);
1037 i = __strcoll_l(__one, __two, loc);
1038 j = __strcoll_l(__one, __two, loc_dup);
1042 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1043 [enable_clocale_flag=generic])
1046 # ... at some point put __strxfrm_l tests in as well.
1049 enable_clocale_flag=generic
1054 # Deal with gettext issues. Default to not using it (=no) until we detect
1055 # support for it later. Let the user turn it off via --e/d, but let that
1056 # default to on for easier handling.
1059 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1063 # Set configure bits for specified locale package
1064 case ${enable_clocale_flag} in
1066 AC_MSG_RESULT(generic)
1068 CLOCALE_H=config/locale/generic/c_locale.h
1069 CLOCALE_CC=config/locale/generic/c_locale.cc
1070 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1071 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1072 CCOLLATE_CC=config/locale/generic/collate_members.cc
1073 CCTYPE_CC=config/locale/generic/ctype_members.cc
1074 CMESSAGES_H=config/locale/generic/messages_members.h
1075 CMESSAGES_CC=config/locale/generic/messages_members.cc
1076 CMONEY_CC=config/locale/generic/monetary_members.cc
1077 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1078 CTIME_H=config/locale/generic/time_members.h
1079 CTIME_CC=config/locale/generic/time_members.cc
1080 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1085 # Declare intention to use gettext, and add support for specific
1087 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1090 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1091 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1092 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1095 # Export the build objects.
1096 for ling in $ALL_LINGUAS; do \
1097 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1098 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1100 AC_SUBST(glibcxx_MOFILES)
1101 AC_SUBST(glibcxx_POFILES)
1103 CLOCALE_H=config/locale/gnu/c_locale.h
1104 CLOCALE_CC=config/locale/gnu/c_locale.cc
1105 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1106 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1107 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1108 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1109 CMESSAGES_H=config/locale/gnu/messages_members.h
1110 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1111 CMONEY_CC=config/locale/gnu/monetary_members.cc
1112 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1113 CTIME_H=config/locale/gnu/time_members.h
1114 CTIME_CC=config/locale/gnu/time_members.cc
1115 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1118 AC_MSG_RESULT(IEEE 1003.1)
1120 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1121 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1122 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1123 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1124 CCOLLATE_CC=config/locale/generic/collate_members.cc
1125 CCTYPE_CC=config/locale/generic/ctype_members.cc
1126 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1127 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1128 CMONEY_CC=config/locale/generic/monetary_members.cc
1129 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1130 CTIME_H=config/locale/generic/time_members.h
1131 CTIME_CC=config/locale/generic/time_members.cc
1132 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1136 # This is where the testsuite looks for locale catalogs, using the
1137 # -DLOCALEDIR define during testsuite compilation.
1138 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1139 AC_SUBST(glibcxx_localedir)
1141 # A standalone libintl (e.g., GNU libintl) may be in use.
1142 if test $USE_NLS = yes; then
1143 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1144 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1146 if test $USE_NLS = yes; then
1147 AC_DEFINE(_GLIBCXX_USE_NLS)
1152 AC_SUBST(CCODECVT_H)
1153 AC_SUBST(CMESSAGES_H)
1154 AC_SUBST(CCODECVT_CC)
1155 AC_SUBST(CCOLLATE_CC)
1157 AC_SUBST(CMESSAGES_CC)
1159 AC_SUBST(CNUMERIC_CC)
1162 AC_SUBST(CLOCALE_CC)
1163 AC_SUBST(CLOCALE_INTERNAL_H)
1168 dnl Check for which std::allocator base class to use. The choice is
1169 dnl mapped from a subdirectory of include/ext.
1173 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1174 AC_MSG_CHECKING([for std::allocator base class to use])
1175 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1176 [use KIND for target std::allocator base],
1177 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1179 # If they didn't use this option switch, or if they specified --enable
1180 # with no specific model, we'll have to look for one. If they
1181 # specified --disable (???), do likewise.
1182 if test $enable_libstdcxx_allocator = no ||
1183 test $enable_libstdcxx_allocator = yes;
1185 enable_libstdcxx_allocator=auto
1188 # Either a known package, or "auto". Auto implies the default choice
1189 # for a particular platform.
1190 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1192 # Probe for host-specific support if no specific model is specified.
1194 if test $enable_libstdcxx_allocator_flag = auto; then
1195 case ${target_os} in
1196 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1197 enable_libstdcxx_allocator_flag=mt
1200 enable_libstdcxx_allocator_flag=new
1204 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1207 # Set configure bits for specified locale package
1208 case ${enable_libstdcxx_allocator_flag} in
1210 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1211 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1214 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1215 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1218 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1219 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1222 ALLOCATOR_H=config/allocator/new_allocator_base.h
1223 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1226 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1227 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1231 AC_SUBST(ALLOCATOR_H)
1232 AC_SUBST(ALLOCATOR_NAME)
1237 dnl Check for whether the Boost-derived checks should be turned on.
1239 dnl --enable-concept-checks turns them on.
1240 dnl --disable-concept-checks leaves them off.
1241 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1242 dnl Where DEFAULT is either `yes' or `no'.
1244 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1245 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1246 if test $enable_concept_checks = yes; then
1247 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1253 dnl Check for which I/O library to use: stdio, or something specific.
1255 dnl Default is stdio.
1257 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1258 AC_MSG_CHECKING([for underlying I/O to use])
1259 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1260 [use target-specific I/O package], [permit stdio])
1262 # Now that libio has been removed, you can have any color you want as long
1263 # as it's black. This is one big no-op until other packages are added, but
1264 # showing the framework never hurts.
1265 case ${enable_cstdio} in
1267 CSTDIO_H=config/io/c_io_stdio.h
1268 BASIC_FILE_H=config/io/basic_file_stdio.h
1269 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1270 AC_MSG_RESULT(stdio)
1275 AC_SUBST(BASIC_FILE_H)
1276 AC_SUBST(BASIC_FILE_CC)
1281 dnl Check for "unusual" flags to pass to the compiler while building.
1283 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1284 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1285 dnl --disable-cxx-flags passes nothing.
1286 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1287 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1288 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1289 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1290 dnl If "default flags" is an empty string, the effect is the same
1291 dnl as --disable or --enable=no.
1293 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1294 AC_MSG_CHECKING([for extra compiler flags for building])
1295 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1296 [pass compiler FLAGS when building library],
1297 [case "x$enable_cxx_flags" in
1298 xno | x) enable_cxx_flags= ;;
1300 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1303 # Run through flags (either default or command-line) and set anything
1304 # extra (e.g., #defines) that must accompany particular g++ options.
1305 if test -n "$enable_cxx_flags"; then
1306 for f in $enable_cxx_flags; do
1310 *) # and we're trying to pass /what/ exactly?
1311 AC_MSG_ERROR([compiler flags start with a -]) ;;
1316 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1317 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1318 AC_SUBST(EXTRA_CXX_FLAGS)
1323 dnl Check for wide character support. Has the same effect as the option
1324 dnl in gcc's configure, but in a form that autoconf can mess with.
1326 dnl --enable-c-mbchar requests all the wchar_t stuff.
1327 dnl --disable-c-mbchar doesn't.
1328 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1329 dnl Where DEFAULT is either `yes' or `no'.
1331 AC_DEFUN([GLIBCXX_ENABLE_C_MBCHAR], [
1332 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1333 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1338 dnl Check to see if debugging libraries are to be built.
1340 dnl --enable-libstdcxx-debug
1341 dnl builds a separate set of debugging libraries in addition to the
1342 dnl normal (shared, static) libstdc++ binaries.
1344 dnl --disable-libstdcxx-debug
1345 dnl builds only one (non-debug) version of libstdc++.
1347 dnl --enable-libstdcxx-debug-flags=FLAGS
1348 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1350 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1351 dnl Where DEFAULT is either `yes' or `no'.
1353 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1354 AC_MSG_CHECKING([for additional debug build])
1355 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1356 AC_MSG_RESULT($enable_libstdcxx_debug)
1357 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1362 dnl Check for explicit debug flags.
1364 dnl --enable-libstdcxx-debug-flags='-O1'
1365 dnl is a general method for passing flags to be used when
1366 dnl building debug libraries with --enable-debug.
1368 dnl --disable-libstdcxx-debug-flags does nothing.
1369 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1370 dnl If "default flags" is an empty string, the effect is the same
1371 dnl as --disable or --enable=no.
1373 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1374 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1375 [pass compiler FLAGS when building debug library],
1376 [case "x$enable_libstdcxx_debug_flags" in
1377 xno | x) enable_libstdcxx_debug_flags= ;;
1379 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1382 # Option parsed, now set things appropriately
1383 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1384 AC_SUBST(DEBUG_FLAGS)
1386 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1391 dnl Check if the user only wants a freestanding library implementation.
1393 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1394 dnl installing only the headers required by [17.4.1.3] and the language
1395 dnl support library. More than that will be built (to keep the Makefiles
1396 dnl conveniently clean), but not installed.
1399 dnl is_hosted (yes/no)
1402 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1404 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1405 AC_ARG_ENABLE([hosted-libstdcxx],
1406 AC_HELP_STRING([--disable-hosted-libstdcxx],
1407 [only build freestanding C++ runtime support]),,
1410 enable_hosted_libstdcxx=no
1413 enable_hosted_libstdcxx=yes
1416 if test "$enable_hosted_libstdcxx" = no; then
1417 AC_MSG_NOTICE([Only freestanding libraries will be built])
1421 enable_libstdcxx_pch=no
1426 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1427 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1428 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1433 dnl Check for template specializations for the 'long long' type extension.
1434 dnl The result determines only whether 'long long' I/O is enabled; things
1435 dnl like numeric_limits<> specializations are always available.
1437 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1438 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1439 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1440 dnl Where DEFAULT is either `yes' or `no'.
1442 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1443 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1444 if test $enable_long_long = yes; then
1445 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1451 dnl Check to see if building and using a C++ precompiled header can be done.
1453 dnl --enable-libstdcxx-pch=yes
1454 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1455 dnl may work, after some light-hearted attempts to puzzle out compiler
1456 dnl support, flip bits on in include/Makefile.am
1458 dnl --disable-libstdcxx-pch
1459 dnl turns off attempts to use or build stdc++.h.gch.
1462 dnl glibcxx_PCHFLAGS
1464 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1465 AC_MSG_CHECKING([for enabled PCH])
1466 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1467 AC_MSG_RESULT([$enable_libstdcxx_pch])
1469 if test $enable_libstdcxx_pch = yes; then
1470 AC_CACHE_CHECK([for compiler with PCH support],
1471 [glibcxx_cv_prog_CXX_pch],
1472 [ac_save_CXXFLAGS="$CXXFLAGS"
1473 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1476 echo '#include <math.h>' > conftest.h
1477 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1478 -o conftest.h.gch 1>&5 2>&1 &&
1479 echo '#error "pch failed"' > conftest.h &&
1480 echo '#include "conftest.h"' > conftest.cc &&
1481 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1483 glibcxx_cv_prog_CXX_pch=yes
1485 glibcxx_cv_prog_CXX_pch=no
1488 CXXFLAGS=$ac_save_CXXFLAGS
1491 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1494 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1495 if test $enable_libstdcxx_pch = yes; then
1496 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1500 AC_SUBST(glibcxx_PCHFLAGS)
1505 dnl Check for exception handling support. If an explicit enable/disable
1506 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1507 dnl target may or may not support call frame exceptions.
1509 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1510 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1511 dnl Neither one forces an attempt at detection.
1514 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1516 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1517 AC_MSG_CHECKING([for exception model to use])
1520 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1521 [force use of builtin_setjmp for exceptions],
1522 [permit yes|no|auto])
1524 if test $enable_sjlj_exceptions = auto; then
1525 # Botheration. Now we've got to detect the exception model. Link tests
1526 # against libgcc.a are problematic since we've not been given proper -L
1527 # bits for single-tree newlib and libgloss.
1529 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1530 cat > conftest.$ac_ext << EOF
1531 [#]line __oline__ "configure"
1540 old_CXXFLAGS="$CXXFLAGS"
1542 if AC_TRY_EVAL(ac_compile); then
1543 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1544 enable_sjlj_exceptions=yes
1545 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1546 enable_sjlj_exceptions=no
1549 CXXFLAGS="$old_CXXFLAGS"
1553 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1554 # to two different models.
1555 case $enable_sjlj_exceptions in
1557 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1558 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1559 ac_exception_model_name=sjlj
1562 ac_exception_model_name="call frame"
1565 AC_MSG_ERROR([unable to detect exception model])
1569 AC_MSG_RESULT($ac_exception_model_name)
1574 dnl Add version tags to symbols in shared library (or not), additionally
1575 dnl marking other symbols as private/local (or not).
1577 dnl --enable-symvers=style adds a version script to the linker call when
1578 dnl creating the shared library. The choice of version script is
1579 dnl controlled by 'style'.
1580 dnl --disable-symvers does not.
1581 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1582 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1583 dnl choose a default style based on linker characteristics. Passing
1584 dnl 'no' disables versioning.
1586 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1588 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1589 [enables symbol versioning of the shared library],
1590 [permit yes|no|gnu])
1592 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1593 # don't know enough about $LD to do tricks...
1594 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1595 # FIXME The following test is too strict, in theory.
1596 if test $enable_shared = no ||
1598 test x$glibcxx_gnu_ld_version = x; then
1602 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1603 if test $enable_symvers != no; then
1604 AC_MSG_CHECKING([for shared libgcc])
1605 ac_save_CFLAGS="$CFLAGS"
1607 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1608 CFLAGS="$ac_save_CFLAGS"
1609 if test $glibcxx_shared_libgcc = no; then
1610 cat > conftest.c <<EOF
1611 int main (void) { return 0; }
1614 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1615 -shared -shared-libgcc -o conftest.so \
1616 conftest.c -v 2>&1 >/dev/null \
1617 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1619 rm -f conftest.c conftest.so
1620 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1621 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1622 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1623 CFLAGS="$ac_save_CFLAGS"
1626 AC_MSG_RESULT($glibcxx_shared_libgcc)
1629 # For GNU ld, we need at least this version. The format is described in
1630 # GLIBCXX_CHECK_LINKER_FEATURES above.
1631 glibcxx_min_gnu_ld_version=21400
1632 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1634 # Check to see if unspecified "yes" value can win, given results above.
1635 # Change "yes" into either "no" or a style name.
1636 if test $enable_symvers = yes; then
1637 if test $with_gnu_ld = yes &&
1638 test $glibcxx_shared_libgcc = yes;
1640 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1643 # The right tools, the right setup, but too old. Fallbacks?
1644 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1645 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1646 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1647 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1648 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1649 # Globbing fix is present, proper block support is not.
1650 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1651 dnl enable_symvers=???
1652 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1656 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1662 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1663 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1664 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1665 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1670 # Everything parsed; figure out what file to use.
1671 case $enable_symvers in
1673 SYMVER_MAP=config/linker-map.dummy
1676 SYMVER_MAP=config/linker-map.gnu
1677 AC_DEFINE(_GLIBCXX_SYMVER)
1681 AC_SUBST(SYMVER_MAP)
1682 AC_SUBST(port_specific_symbol_files)
1683 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1684 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1689 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1690 dnl We must stage the required headers so that they will be installed
1691 dnl with the library (unlike libgcc, the STL implementation is provided
1692 dnl solely within headers). Since we must not inject random user-space
1693 dnl macro names into user-provided C++ code, we first stage into <file>-in
1694 dnl and process to <file> with an output command. The reason for a two-
1695 dnl stage process here is to correctly handle $srcdir!=$objdir without
1696 dnl having to write complex code (the sed commands to clean the macro
1697 dnl namespace are complex and fragile enough as it is). We must also
1698 dnl add a relative path so that -I- is supported properly.
1701 dnl glibcxx_thread_h
1704 dnl HAVE_GTHR_DEFAULT
1706 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1707 AC_MSG_CHECKING([for thread model used by GCC])
1708 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1709 AC_MSG_RESULT([$target_thread_file])
1711 if test $target_thread_file != single; then
1712 AC_DEFINE(HAVE_GTHR_DEFAULT)
1715 glibcxx_thread_h=gthr-$target_thread_file.h
1716 AC_SUBST(glibcxx_thread_h)
1720 # Check whether LC_MESSAGES is available in <locale.h>.
1721 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1723 # This file file be copied and used freely without restrictions. It can
1724 # be used in projects which are not available under the GNU Public License
1725 # but which still want to provide support for the GNU gettext functionality.
1726 # Please note that the actual code is *not* freely available.
1729 AC_DEFUN([AC_LC_MESSAGES], [
1730 AC_CHECK_HEADER(locale.h, [
1731 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1732 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1733 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1734 if test $ac_cv_val_LC_MESSAGES = yes; then
1735 AC_DEFINE(HAVE_LC_MESSAGES)
1741 sinclude([../libtool.m4])
1742 dnl The lines below arrange for aclocal not to bring an installed
1743 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1744 dnl add a definition of LIBTOOL to Makefile.in.
1745 ifelse(,,,[AC_SUBST(LIBTOOL)
1746 AC_DEFUN([AM_PROG_LIBTOOL])
1747 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1748 AC_DEFUN([AC_PROG_LD])
1751 dnl vim:et:ts=2:sw=2