3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
6 dnl end of configure. This lets tested variables be reassigned, and the
7 dnl conditional will depend on the final state of the variable. For a simple
8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
11 AC_DEFUN(GLIBCXX_CONDITIONAL, [dnl
12 m4_divert_text([glibcxx_diversion],dnl
13 AM_CONDITIONAL([$1],[$2])
16 AC_DEFUN(GLIBCXX_EVALUATE_CONDITIONALS, [m4_undivert([glibcxx_diversion])])dnl
20 dnl Check to see what architecture and operating system we are compiling
21 dnl for. Also, if architecture- or OS-specific flags are required for
22 dnl compilation, pick them up here.
24 AC_DEFUN(GLIBCXX_CHECK_HOST, [
25 . $glibcxx_srcdir/configure.host
26 AC_MSG_NOTICE(CPU config directory is $cpu_include_dir)
27 AC_MSG_NOTICE(OS config directory is $os_include_dir)
32 dnl Initialize basic configure bits.
37 AC_DEFUN(GLIBCXX_TOPREL_CONFIGURE, [
38 # Sets up multi_basedir, which is srcdir/.. plus the usual
39 # "multi_source_toprel_bottom_adjust" lunacy as needed.
40 AM_ENABLE_MULTILIB(, ..)
42 # The generated code is exactly the same, except that automake's looks in
43 # ".. $srcdir/.." and autoconf's looks in multi_basedir. Apparently other
44 # things are triggered on the presence of the two ...AUX_DIR[S], but I don't
45 # know what they are or what the other differences might be (and they keep
48 # Looking in multi_basedir seems smarter, so actually execute that branch.
50 # this is for automake
53 # this is for autoconf
54 AC_CONFIG_AUX_DIRS(${multi_basedir})
63 dnl Initialize the rest of the library configury. At this point we have
64 dnl variables like $host.
67 dnl gcc_version (x.y.z format)
70 dnl glibcxx_builddir (absolute path)
71 dnl glibcxx_srcdir (absolute path)
72 dnl toplevel_srcdir (absolute path)
75 dnl with_target_subdir
77 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
78 dnl - default settings for all AM_CONFITIONAL test variables
79 dnl - lots of tools, like CC and CXX
81 AC_DEFUN(GLIBCXX_CONFIGURE, [
82 # Keep these sync'd with the list in Makefile.am. The first provides an
83 # expandable list at autoconf time; the second provides an expandable list
84 # (i.e., shell variable) at configure time.
85 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
86 SUBDIRS='glibcxx_SUBDIRS'
88 # These need to be absolute paths, yet at the same time need to
89 # canonicalize only relative paths, because then amd will not unmount
90 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
91 glibcxx_builddir=`${PWDCMD-pwd}`
93 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
94 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
96 toplevel_srcdir=${glibcxx_srcdir}/..
97 AC_SUBST(glibcxx_builddir)
98 AC_SUBST(glibcxx_srcdir)
99 AC_SUBST(toplevel_srcdir)
101 # We use these options to decide which functions to include. They are
102 # set from the top level.
103 AC_ARG_WITH([target-subdir],
104 AC_HELP_STRING([--with-target-subdir=SUBDIR],
105 [configuring in a subdirectory]))
107 AC_ARG_WITH([cross-host],
108 AC_HELP_STRING([--with-cross-host=HOST],
109 [configuring with a cross compiler]))
111 AC_ARG_WITH([newlib],
112 AC_HELP_STRING([--with-newlib],
113 [assume newlib as a system C library]))
115 # We're almost certainly being configured before anything else which uses
116 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
117 # we not cache the value of CXX that we "discover" here, because it's set
118 # to something unique for us and libjava. Other target libraries need to
119 # find CXX for themselves. We yank the rug out from under the normal AC_*
120 # process by sneakily renaming the cache variable. This also lets us debug
121 # the value of "our" CXX in postmortems.
123 # We must also force CXX to /not/ be a precious variable, otherwise the
124 # wrong (non-multilib-adjusted) value will be used in multilibs. This
125 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
126 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
127 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
129 # -fno-builtin must be present here so that a non-conflicting form of
130 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
132 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
133 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
134 m4_define([_AC_ARG_VAR_PRECIOUS],[])
135 save_CXXFLAGS="$CXXFLAGS"
136 CXXFLAGS="$CXXFLAGS -fno-builtin"
139 CXXFLAGS="$save_CXXFLAGS"
140 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
144 # For directory versioning (e.g., headers) and other variables.
145 AC_MSG_CHECKING([for GCC version number])
146 gcc_version=`$CXX -dumpversion`
147 AC_MSG_RESULT($gcc_version)
149 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
150 # available). Uncomment the next line to force a particular method.
154 AC_CHECK_TOOL(AS, as)
155 AC_CHECK_TOOL(AR, ar)
156 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
160 # Set up safe default values for all subsequent AM_CONDITIONAL tests
161 # which are themselves conditionally expanded.
162 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
163 ## other macros from doing the same. This should be automated.) -pme
166 #enable_libstdcxx_debug=no
167 #enable_libstdcxx_pch=no
172 #enable_hosted_libstdcxx=yes
174 # Find platform-specific directories containing configuration info.
175 # Also possibly modify flags used elsewhere, as needed by the platform.
180 m4_include([linkage.m4])
181 m4_include([../config/no-executables.m4])
185 dnl Tests for newer compiler features, or features that are present in newer
186 dnl compiler versions but not older compiler versions still in use, should
190 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
191 dnl new inlining code or the new system_header pragma will die on -Werror.
192 dnl Leave it out by default and use maint-mode to use it.
193 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
194 dnl compiler supports it and the user has not requested debug mode.
196 AC_DEFUN(GLIBCXX_CHECK_COMPILER_FEATURES, [
197 # All these tests are for C++; save the language and the compiler flags.
198 # The CXXFLAGS thing is suspicious, but based on similar bits previously
199 # found in GLIBCXX_CONFIGURE.
202 ac_test_CXXFLAGS="${CXXFLAGS+set}"
203 ac_save_CXXFLAGS="$CXXFLAGS"
205 # Check for maintainer-mode bits.
206 if test x"$USE_MAINTAINER_MODE" = xno; then
212 # Check for -ffunction-sections -fdata-sections
213 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
214 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
215 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
216 if test "$ac_test_CXXFLAGS" = set; then
217 CXXFLAGS="$ac_save_CXXFLAGS"
219 # this is the suspicious part
222 if test x"$ac_fdsections" = x"yes"; then
223 SECTION_FLAGS='-ffunction-sections -fdata-sections'
225 AC_MSG_RESULT($ac_fdsections)
229 AC_SUBST(SECTION_FLAGS)
234 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
235 dnl the native linker is in use, all variables will be defined to something
236 dnl safe (like an empty string).
239 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
240 dnl OPT_LDFLAGS='-Wl,-O1' if possible
241 dnl LD (as a side effect of testing)
244 dnl glibcxx_gnu_ld_version (possibly)
246 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
247 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
249 AC_DEFUN(GLIBCXX_CHECK_LINKER_FEATURES, [
250 # If we're not using GNU ld, then there's no point in even trying these
251 # tests. Check for that first. We should have already tested for gld
252 # by now (in libtool), but require it now just to be safe...
253 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
254 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
255 AC_REQUIRE([AC_PROG_LD])
256 AC_REQUIRE([AC_PROG_AWK])
258 # The name set by libtool depends on the version of libtool. Shame on us
259 # for depending on an impl detail, but c'est la vie. Older versions used
260 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
261 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
262 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
263 # set (hence we're using an older libtool), then set it.
264 if test x${with_gnu_ld+set} != xset; then
265 if test x${ac_cv_prog_gnu_ld+set} != xset; then
266 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
269 with_gnu_ld=$ac_cv_prog_gnu_ld
273 # Start by getting the version number. I think the libtool test already
274 # does some of this, but throws away the result.
276 ldver=`$LD --version 2>/dev/null | head -1 | \
277 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
279 glibcxx_gnu_ld_version=`echo $ldver | \
280 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
283 if test "$with_gnu_ld" = "notbroken"; then
284 # GNU ld it is! Joy and bunny rabbits!
286 # All these tests are for C++; save the language and the compiler flags.
287 # Need to do this so that g++ won't try to link in libstdc++
288 ac_test_CFLAGS="${CFLAGS+set}"
289 ac_save_CFLAGS="$CFLAGS"
290 CFLAGS='-x c++ -Wl,--gc-sections'
292 # Check for -Wl,--gc-sections
293 # XXX This test is broken at the moment, as symbols required for linking
294 # are now in libsupc++ (not built yet). In addition, this test has
295 # cored on solaris in the past. In addition, --gc-sections doesn't
296 # really work at the moment (keeps on discarding used sections, first
297 # .eh_frame and now some of the glibc sections for iconv).
298 # Bzzzzt. Thanks for playing, maybe next time.
299 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
307 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
308 if test "$ac_test_CFLAGS" = set; then
309 CFLAGS="$ac_save_CFLAGS"
311 # this is the suspicious part
314 if test "$ac_sectionLDflags" = "yes"; then
315 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
317 AC_MSG_RESULT($ac_sectionLDflags)
320 # Set linker optimization flags.
321 if test x"$with_gnu_ld" = x"yes"; then
322 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
325 AC_SUBST(SECTION_LDFLAGS)
326 AC_SUBST(OPT_LDFLAGS)
331 dnl Check to see if this target can enable the wchar_t parts.
332 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
333 dnl must have been previously checked.) By default, wide characters are
337 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
338 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
340 AC_DEFUN(GLIBCXX_CHECK_WCHAR_T_SUPPORT, [
341 # Test wchar.h for mbstate_t, which is needed for char_traits and
342 # others even if wchar_t support is not on.
343 AC_MSG_CHECKING([for mbstate_t])
344 AC_TRY_COMPILE([#include <wchar.h>],
345 [mbstate_t teststate;],
346 have_mbstate_t=yes, have_mbstate_t=no)
347 AC_MSG_RESULT($have_mbstate_t)
348 if test x"$have_mbstate_t" = xyes; then
349 AC_DEFINE(HAVE_MBSTATE_T)
352 # Sanity check for existence of ISO C99 headers for extended encoding.
353 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
354 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
356 # Only continue checking if the ISO C99 headers exist and support is on.
357 if test x"$ac_has_wchar_h" = xyes &&
358 test x"$ac_has_wctype_h" = xyes &&
359 test x"$enable_c_mbchar" != xno; then
361 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
362 # numeric_limits can instantiate type_traits<wchar_t>
363 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
364 AC_TRY_COMPILE([#include <wchar.h>],
365 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
366 has_wchar_minmax=yes, has_wchar_minmax=no)
367 AC_MSG_RESULT($has_wchar_minmax)
369 # Test wchar.h for WEOF, which is what we use to determine whether
370 # to specialize for char_traits<wchar_t> or not.
371 AC_MSG_CHECKING([for WEOF])
374 #include <stddef.h>],
376 has_weof=yes, has_weof=no)
377 AC_MSG_RESULT($has_weof)
379 # Tests for wide character functions used in char_traits<wchar_t>.
381 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset],
384 # Checks for names injected into std:: by the c_std headers.
385 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \
386 fwprintf fwscanf swprintf swscanf vfwprintf vswprintf \
387 vwprintf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
388 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstol \
389 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
390 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
393 # Checks for wide character functions that are not required
394 # for basic wchar_t support. Don't disable support if they are missing.
395 # Injection of these is wrapped with guard macros.
396 AC_CHECK_FUNCS([vfwscanf vswscanf vwscanf wcstof iswblank],[],[])
398 AC_MSG_CHECKING([for ISO C99 wchar_t support])
399 if test x"$has_weof" = xyes &&
400 test x"$has_wchar_minmax" = xyes &&
401 test x"$ac_wfuncs" = xyes;
403 ac_isoC99_wchar_t=yes
407 AC_MSG_RESULT($ac_isoC99_wchar_t)
409 # Use iconv for wchar_t to char conversions. As such, check for
410 # X/Open Portability Guide, version 2 features (XPG2).
411 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
412 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
414 # Check for existence of libiconv.a providing XPG2 wchar_t support.
415 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
417 LIBS="$LIBS $libiconv"
419 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
420 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
424 AC_MSG_CHECKING([for XPG2 wchar_t support])
425 if test x"$ac_has_iconv_h" = xyes &&
426 test x"$ac_has_langinfo_h" = xyes &&
427 test x"$ac_XPG2funcs" = xyes;
433 AC_MSG_RESULT($ac_XPG2_wchar_t)
435 # At the moment, only enable wchar_t specializations if all the
436 # above support is present.
437 if test x"$ac_isoC99_wchar_t" = xyes &&
438 test x"$ac_XPG2_wchar_t" = xyes;
440 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
444 AC_MSG_CHECKING([for enabled wchar_t specializations])
445 AC_MSG_RESULT($enable_wchar_t)
450 dnl Check for headers for, and arguments to, the setrlimit() function.
451 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
454 dnl _GLIBCXX_MEM_LIMITS if we can set artificial limits on memory
455 dnl various HAVE_MEMLIMIT_* for individual limit names
457 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT_ancilliary, [
460 #include <sys/time.h>
461 #include <sys/resource.h>
463 [ int f = RLIMIT_$1 ; ],
464 [glibcxx_mresult=1], [glibcxx_mresult=0])
465 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcxx_mresult,
466 [Only used in build directory testsuite_hooks.h.])
469 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT, [
470 setrlimit_have_headers=yes
471 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
473 [setrlimit_have_headers=no])
474 # If don't have the headers, then we can't run the tests now, and we
475 # won't be seeing any of these during testsuite compilation.
476 if test $setrlimit_have_headers = yes; then
477 # Can't do these in a loop, else the resulting syntax is wrong.
478 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
479 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
480 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
481 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
483 # Check for rlimit, setrlimit.
484 AC_CACHE_VAL(ac_setrlimit, [
487 #include <sys/time.h>
488 #include <sys/resource.h>
492 [ac_setrlimit=yes], [ac_setrlimit=no])
496 AC_MSG_CHECKING([for testsuite memory limit support])
497 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
499 AC_DEFINE(_GLIBCXX_MEM_LIMITS)
503 AC_MSG_RESULT($ac_mem_limits)
508 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
509 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
511 AC_DEFUN(GLIBCXX_CHECK_S_ISREG_OR_S_IFREG, [
512 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
514 [#include <sys/stat.h>],
517 S_ISREG(buffer.st_mode);],
518 [glibcxx_cv_S_ISREG=yes],
519 [glibcxx_cv_S_ISREG=no])
521 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
523 [#include <sys/stat.h>],
526 S_IFREG & buffer.st_mode;],
527 [glibcxx_cv_S_IFREG=yes],
528 [glibcxx_cv_S_IFREG=no])
530 if test $glibcxx_cv_S_ISREG = yes; then
531 AC_DEFINE(HAVE_S_ISREG)
532 elif test $glibcxx_cv_S_IFREG = yes; then
533 AC_DEFINE(HAVE_S_IFREG)
539 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
541 AC_DEFUN(GLIBCXX_CHECK_POLL, [
542 AC_CACHE_VAL(glibcxx_cv_POLL, [
545 [struct pollfd pfd[1];
546 pfd[0].events = POLLIN;
548 [glibcxx_cv_POLL=yes],
549 [glibcxx_cv_POLL=no])
551 if test $glibcxx_cv_POLL = yes; then
558 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
560 AC_DEFUN(GLIBCXX_CHECK_WRITEV, [
561 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
563 [#include <sys/uio.h>],
564 [struct iovec iov[2];
566 [glibcxx_cv_WRITEV=yes],
567 [glibcxx_cv_WRITEV=no])
569 if test $glibcxx_cv_WRITEV = yes; then
570 AC_DEFINE(HAVE_WRITEV)
576 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
578 AC_DEFUN(GLIBCXX_CHECK_INT64_T, [
579 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
581 [#include <stdint.h>],
583 [glibcxx_cv_INT64_T=yes],
584 [glibcxx_cv_INT64_T=no])
586 if test $glibcxx_cv_INT64_T = yes; then
587 AC_DEFINE(HAVE_INT64_T)
593 dnl Check whether LFS support is available.
595 AC_DEFUN(GLIBCXX_CHECK_LFS, [
598 AC_CACHE_VAL(glibcxx_cv_LFS, [
605 fseeko64(fp, 0, SEEK_CUR);
607 lseek64(1, 0, SEEK_CUR);],
608 [glibcxx_cv_LFS=yes],
611 if test $glibcxx_cv_LFS = yes; then
612 AC_DEFINE(_GLIBCXX_USE_LFS)
619 dnl Does any necessary configuration of the testsuite directory. Generates
620 dnl the testsuite_hooks.h header.
622 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
625 dnl enable_abi_check / GLIBCXX_TEST_ABI
629 AC_DEFUN(GLIBCXX_CONFIGURE_TESTSUITE, [
630 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
631 # Do checks for memory limit functions.
632 GLIBCXX_CHECK_SETRLIMIT
634 # Look for setenv, so that extended locale tests can be performed.
635 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
637 if test $enable_symvers = no; then
642 enable_abi_check=no ;;
644 enable_abi_check=yes ;;
648 # Only build this as native, since automake does not understand
653 # Export file names for ABI checking.
654 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
655 AC_SUBST(baseline_dir)
657 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
658 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
663 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
667 dnl TOPLEVEL_INCLUDES
669 AC_DEFUN(GLIBCXX_EXPORT_INCLUDES, [
670 # Used for every C++ compile we perform.
672 -I$glibcxx_builddir/include/$host_alias \
673 -I$glibcxx_builddir/include \
674 -I$glibcxx_srcdir/libsupc++"
676 # For Canadian crosses, pick this up too.
677 if test $CANADIAN = yes; then
678 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
681 # Stuff in the actual top level. Currently only used by libsupc++ to
682 # get unwind* headers from the gcc dir.
683 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
684 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
686 # Now, export this to all the little Makefiles....
687 AC_SUBST(GLIBCXX_INCLUDES)
688 AC_SUBST(TOPLEVEL_INCLUDES)
693 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
694 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
697 dnl OPTIMIZE_CXXFLAGS
700 AC_DEFUN(GLIBCXX_EXPORT_FLAGS, [
701 # Optimization flags that are probably a good idea for thrill-seekers. Just
702 # uncomment the lines below and make, everything else is ready to go...
703 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
705 AC_SUBST(OPTIMIZE_CXXFLAGS)
707 WARN_FLAGS='-Wall -W -Wwrite-strings -Wcast-qual'
713 dnl All installation directory information is determined here.
717 dnl glibcxx_prefixdir
718 dnl glibcxx_toolexecdir
719 dnl glibcxx_toolexeclibdir
721 dnl Assumes cross_compiling bits already done, and with_cross_host in
724 AC_DEFUN(GLIBCXX_EXPORT_INSTALL_INFO, [
725 glibcxx_toolexecdir=no
726 glibcxx_toolexeclibdir=no
727 glibcxx_prefixdir=$prefix
729 AC_MSG_CHECKING([for gxx-include-dir])
730 AC_ARG_WITH([gxx-include-dir],
731 AC_HELP_STRING([--with-gxx-include-dir=DIR],
732 [installation directory for include files]),
734 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
735 no) gxx_include_dir=no ;;
736 *) gxx_include_dir=$withval ;;
738 [gxx_include_dir=no])
739 AC_MSG_RESULT($gxx_include_dir)
741 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
742 AC_ARG_ENABLE([version-specific-runtime-libs],
743 AC_HELP_STRING([--enable-version-specific-runtime-libs],
744 [Specify that runtime libraries should be installed in a compiler-specific directory]),
745 [case "$enableval" in
746 yes) version_specific_libs=yes ;;
747 no) version_specific_libs=no ;;
748 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
750 [version_specific_libs=no])
751 AC_MSG_RESULT($version_specific_libs)
753 # Default case for install directory for include files.
754 if test $version_specific_libs = no && test $gxx_include_dir = no; then
755 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
758 # Version-specific runtime libs processing.
759 if test $version_specific_libs = yes; then
760 # Need the gcc compiler version to know where to install libraries
761 # and header files if --enable-version-specific-runtime-libs option
763 if test x"$gxx_include_dir" = x"no"; then
764 gxx_include_dir='${libdir}/gcc-lib/${host_alias}/'$gcc_version/include/c++
766 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
767 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
770 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
771 # Install a library built with a cross compiler in tooldir, not libdir.
772 if test x"$glibcxx_toolexecdir" = x"no"; then
773 if test -n "$with_cross_host" &&
774 test x"$with_cross_host" != x"no"; then
775 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
776 glibcxx_toolexeclibdir='${toolexecdir}/lib'
778 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
779 glibcxx_toolexeclibdir='${libdir}'
781 multi_os_directory=`$CXX -print-multi-os-directory`
782 case $multi_os_directory in
783 .) ;; # Avoid trailing /.
784 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
788 AC_MSG_CHECKING([for install location])
789 AC_MSG_RESULT($gxx_include_dir)
791 AC_SUBST(glibcxx_prefixdir)
792 AC_SUBST(gxx_include_dir)
793 AC_SUBST(glibcxx_toolexecdir)
794 AC_SUBST(glibcxx_toolexeclibdir)
800 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
801 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
802 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
804 dnl See docs/html/17_intro/configury.html#enable for documentation.
806 m4_define([GLIBCXX_ENABLE],[dnl
807 m4_define([_g_switch],[--enable-$1])dnl
808 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
809 AC_ARG_ENABLE($1,_g_help,
814 m4_bpatsubst([$5],[permit ])) ;;
815 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
816 dnl Idea for future: generate a URL pointing to
817 dnl "onlinedocs/configopts.html#whatever"
824 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
828 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
829 m4_undefine([_g_switch])dnl
830 m4_undefine([_g_help])dnl
835 dnl Check for ISO/IEC 9899:1999 "C99" support.
837 dnl --enable-c99 defines _GLIBCXX_USE_C99
838 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
839 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
840 dnl Where DEFAULT is either `yes' or `no'.
841 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
843 AC_DEFUN(GLIBCXX_ENABLE_C99, [
844 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
849 # Check for the existence of <math.h> functions used if C99 is enabled.
851 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
852 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
853 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
854 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
855 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
856 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
857 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
858 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
859 AC_TRY_COMPILE([#include <math.h>],
860 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
861 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
862 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
863 AC_TRY_COMPILE([#include <math.h>],
864 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
865 AC_TRY_COMPILE([#include <math.h>],
866 [isunordered(0.0,0.0);],, [ac_c99_math=no])
867 AC_MSG_RESULT($ac_c99_math)
869 # Check for the existence in <stdio.h> of vscanf, et. al.
871 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
872 AC_TRY_COMPILE([#include <stdio.h>],
873 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
874 AC_TRY_COMPILE([#include <stdio.h>
876 void foo(char* fmt, ...)
877 {va_list args; va_start(args, fmt);
878 vfscanf(stderr, "%i", args);}],
879 [],, [ac_c99_stdio=no])
880 AC_TRY_COMPILE([#include <stdio.h>
882 void foo(char* fmt, ...)
883 {va_list args; va_start(args, fmt);
884 vscanf("%i", args);}],
885 [],, [ac_c99_stdio=no])
886 AC_TRY_COMPILE([#include <stdio.h>
888 void foo(char* fmt, ...)
889 {va_list args; va_start(args, fmt);
890 vsnprintf(fmt, 0, "%i", args);}],
891 [],, [ac_c99_stdio=no])
892 AC_TRY_COMPILE([#include <stdio.h>
894 void foo(char* fmt, ...)
895 {va_list args; va_start(args, fmt);
896 vsscanf(fmt, "%i", args);}],
897 [],, [ac_c99_stdio=no])
898 AC_MSG_RESULT($ac_c99_stdio)
900 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
902 AC_MSG_CHECKING([for lldiv_t declaration])
903 AC_CACHE_VAL(ac_c99_lldiv_t, [
904 AC_TRY_COMPILE([#include <stdlib.h>],
906 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
908 AC_MSG_RESULT($ac_c99_lldiv_t)
910 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
911 AC_TRY_COMPILE([#include <stdlib.h>],
912 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
913 AC_TRY_COMPILE([#include <stdlib.h>],
914 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
915 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
916 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
917 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
918 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
919 if test x"$ac_c99_lldiv_t" = x"no"; then
922 AC_MSG_RESULT($ac_c99_stdlib)
924 # Check for the existence of <wchar.h> functions used if C99 is enabled.
925 # XXX the wchar.h checks should be rolled into the general C99 bits.
927 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
928 AC_TRY_COMPILE([#include <wchar.h>],
929 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
930 AC_TRY_COMPILE([#include <wchar.h>],
931 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
932 AC_TRY_COMPILE([#include <wchar.h>],
933 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
934 AC_MSG_RESULT($ac_c99_wchar)
936 AC_MSG_CHECKING([for enabled ISO C99 support])
937 if test x"$ac_c99_math" = x"no" ||
938 test x"$ac_c99_stdio" = x"no" ||
939 test x"$ac_c99_stdlib" = x"no" ||
940 test x"$ac_c99_wchar" = x"no"; then
943 AC_MSG_RESULT($enable_c99)
945 # Option parsed, now set things appropriately
946 if test x"$enable_c99" = x"yes"; then
947 AC_DEFINE(_GLIBCXX_USE_C99)
955 dnl Check for what type of C headers to use.
957 dnl --enable-cheaders= [does stuff].
958 dnl --disable-cheaders [does not do anything, really].
959 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
960 dnl Where DEFAULT is either `c' or `c_std'.
962 AC_DEFUN(GLIBCXX_ENABLE_CHEADERS, [
963 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
964 [construct "C" headers for g++], [permit c|c_std])
965 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
967 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
969 AC_SUBST(C_INCLUDE_DIR)
970 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
971 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
972 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
977 dnl Check for which locale library to use. The choice is mapped to
978 dnl a subdirectory of config/locale.
980 dnl Default is generic.
982 AC_DEFUN(GLIBCXX_ENABLE_CLOCALE, [
983 AC_MSG_CHECKING([for C locale to use])
984 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
985 [use MODEL for target locale package],
986 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
988 # If they didn't use this option switch, or if they specified --enable
989 # with no specific model, we'll have to look for one. If they
990 # specified --disable (???), do likewise.
991 if test $enable_clocale = no || test $enable_clocale = yes; then
995 # Either a known package, or "auto"
996 enable_clocale_flag=$enable_clocale
998 # Probe for locale support if no specific model is specified.
999 # Default to "generic".
1000 if test $enable_clocale_flag = auto; then
1001 case x${target_os} in
1002 xlinux* | xgnu* | xkfreebsd*-gnu | xknetbsd*-gnu)
1003 AC_EGREP_CPP([_GLIBCXX_ok], [
1004 #include <features.h>
1005 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1008 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1010 # Test for bugs early in glibc-2.2.x series
1011 if test x$enable_clocale_flag = xgnu; then
1013 #define _GNU_SOURCE 1
1016 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1017 extern __typeof(newlocale) __newlocale;
1018 extern __typeof(duplocale) __duplocale;
1019 extern __typeof(strcoll_l) __strcoll_l;
1023 const char __one[] = "Äuglein Augmen";
1024 const char __two[] = "Äuglein";
1029 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1030 loc_dup = __duplocale(loc);
1031 i = __strcoll_l(__one, __two, loc);
1032 j = __strcoll_l(__one, __two, loc_dup);
1036 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1037 [enable_clocale_flag=generic])
1040 # ... at some point put __strxfrm_l tests in as well.
1043 enable_clocale_flag=generic
1048 # Deal with gettext issues. Default to not using it (=no) until we detect
1049 # support for it later. Let the user turn it off via --e/d, but let that
1050 # default to on for easier handling.
1053 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1057 # Set configure bits for specified locale package
1058 case ${enable_clocale_flag} in
1060 AC_MSG_RESULT(generic)
1062 CLOCALE_H=config/locale/generic/c_locale.h
1063 CLOCALE_CC=config/locale/generic/c_locale.cc
1064 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1065 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1066 CCOLLATE_CC=config/locale/generic/collate_members.cc
1067 CCTYPE_CC=config/locale/generic/ctype_members.cc
1068 CMESSAGES_H=config/locale/generic/messages_members.h
1069 CMESSAGES_CC=config/locale/generic/messages_members.cc
1070 CMONEY_CC=config/locale/generic/monetary_members.cc
1071 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1072 CTIME_H=config/locale/generic/time_members.h
1073 CTIME_CC=config/locale/generic/time_members.cc
1074 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1079 # Declare intention to use gettext, and add support for specific
1081 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1084 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1085 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1086 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1089 # Export the build objects.
1090 for ling in $ALL_LINGUAS; do \
1091 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1092 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1094 AC_SUBST(glibcxx_MOFILES)
1095 AC_SUBST(glibcxx_POFILES)
1097 CLOCALE_H=config/locale/gnu/c_locale.h
1098 CLOCALE_CC=config/locale/gnu/c_locale.cc
1099 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1100 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1101 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1102 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1103 CMESSAGES_H=config/locale/gnu/messages_members.h
1104 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1105 CMONEY_CC=config/locale/gnu/monetary_members.cc
1106 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1107 CTIME_H=config/locale/gnu/time_members.h
1108 CTIME_CC=config/locale/gnu/time_members.cc
1109 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1112 AC_MSG_RESULT(IEEE 1003.1)
1114 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1115 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1116 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1117 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1118 CCOLLATE_CC=config/locale/generic/collate_members.cc
1119 CCTYPE_CC=config/locale/generic/ctype_members.cc
1120 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1121 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1122 CMONEY_CC=config/locale/generic/monetary_members.cc
1123 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1124 CTIME_H=config/locale/generic/time_members.h
1125 CTIME_CC=config/locale/generic/time_members.cc
1126 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1130 # This is where the testsuite looks for locale catalogs, using the
1131 # -DLOCALEDIR define during testsuite compilation.
1132 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1133 AC_SUBST(glibcxx_localedir)
1135 # A standalone libintl (e.g., GNU libintl) may be in use.
1136 if test $USE_NLS = yes; then
1137 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1138 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1140 if test $USE_NLS = yes; then
1141 AC_DEFINE(_GLIBCXX_USE_NLS)
1146 AC_SUBST(CCODECVT_H)
1147 AC_SUBST(CMESSAGES_H)
1148 AC_SUBST(CCODECVT_CC)
1149 AC_SUBST(CCOLLATE_CC)
1151 AC_SUBST(CMESSAGES_CC)
1153 AC_SUBST(CNUMERIC_CC)
1156 AC_SUBST(CLOCALE_CC)
1157 AC_SUBST(CLOCALE_INTERNAL_H)
1162 dnl Check for whether the Boost-derived checks should be turned on.
1164 dnl --enable-concept-checks turns them on.
1165 dnl --disable-concept-checks leaves them off.
1166 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1167 dnl Where DEFAULT is either `yes' or `no'.
1169 AC_DEFUN(GLIBCXX_ENABLE_CONCEPT_CHECKS, [
1170 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1171 if test $enable_concept_checks = yes; then
1172 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1178 dnl Check for which I/O library to use: stdio, or something specific.
1180 dnl Default is stdio.
1182 AC_DEFUN(GLIBCXX_ENABLE_CSTDIO, [
1183 AC_MSG_CHECKING([for underlying I/O to use])
1184 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1185 [use target-specific I/O package], [permit stdio])
1187 # Now that libio has been removed, you can have any color you want as long
1188 # as it's black. This is one big no-op until other packages are added, but
1189 # showing the framework never hurts.
1190 case ${enable_cstdio} in
1192 CSTDIO_H=config/io/c_io_stdio.h
1193 BASIC_FILE_H=config/io/basic_file_stdio.h
1194 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1195 AC_MSG_RESULT(stdio)
1200 AC_SUBST(BASIC_FILE_H)
1201 AC_SUBST(BASIC_FILE_CC)
1206 dnl Check for "unusual" flags to pass to the compiler while building.
1208 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1209 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1210 dnl --disable-cxx-flags passes nothing.
1211 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1212 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1213 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1214 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1215 dnl If "default flags" is an empty string, the effect is the same
1216 dnl as --disable or --enable=no.
1218 AC_DEFUN(GLIBCXX_ENABLE_CXX_FLAGS, [dnl
1219 AC_MSG_CHECKING([for extra compiler flags for building])
1220 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1221 [pass compiler FLAGS when building library],
1222 [case "x$enable_cxx_flags" in
1223 xno | x) enable_cxx_flags= ;;
1225 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1228 # Run through flags (either default or command-line) and set anything
1229 # extra (e.g., #defines) that must accompany particular g++ options.
1230 if test -n "$enable_cxx_flags"; then
1231 for f in $enable_cxx_flags; do
1235 *) # and we're trying to pass /what/ exactly?
1236 AC_MSG_ERROR([compiler flags start with a -]) ;;
1241 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1242 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1243 AC_SUBST(EXTRA_CXX_FLAGS)
1248 dnl Check for wide character support. Has the same effect as the option
1249 dnl in gcc's configure, but in a form that autoconf can mess with.
1251 dnl --enable-c-mbchar requests all the wchar_t stuff.
1252 dnl --disable-c-mbchar doesn't.
1253 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1254 dnl Where DEFAULT is either `yes' or `no'.
1256 AC_DEFUN(GLIBCXX_ENABLE_C_MBCHAR, [
1257 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1258 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1263 dnl Check to see if debugging libraries are to be built.
1265 dnl --enable-libstdcxx-debug
1266 dnl builds a separate set of debugging libraries in addition to the
1267 dnl normal (shared, static) libstdc++ binaries.
1269 dnl --disable-libstdcxx-debug
1270 dnl builds only one (non-debug) version of libstdc++.
1272 dnl --enable-libstdcxx-debug-flags=FLAGS
1273 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1275 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1276 dnl Where DEFAULT is either `yes' or `no'.
1278 AC_DEFUN(GLIBCXX_ENABLE_DEBUG, [
1279 AC_MSG_CHECKING([for additional debug build])
1280 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1281 AC_MSG_RESULT($enable_libstdcxx_debug)
1282 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1287 dnl Check for explicit debug flags.
1289 dnl --enable-libstdcxx-debug-flags='-O1'
1290 dnl is a general method for passing flags to be used when
1291 dnl building debug libraries with --enable-debug.
1293 dnl --disable-libstdcxx-debug-flags does nothing.
1294 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1295 dnl If "default flags" is an empty string, the effect is the same
1296 dnl as --disable or --enable=no.
1298 AC_DEFUN(GLIBCXX_ENABLE_DEBUG_FLAGS, [
1299 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1300 [pass compiler FLAGS when building debug library],
1301 [case "x$enable_libstdcxx_debug_flags" in
1302 xno | x) enable_libstdcxx_debug_flags= ;;
1304 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1307 # Option parsed, now set things appropriately
1308 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1309 AC_SUBST(DEBUG_FLAGS)
1311 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1316 dnl Check if the user only wants a freestanding library implementation.
1318 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1319 dnl installing only the headers required by [17.4.1.3] and the language
1320 dnl support library. More than that will be built (to keep the Makefiles
1321 dnl conveniently clean), but not installed.
1324 dnl is_hosted (yes/no)
1327 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1329 AC_DEFUN(GLIBCXX_ENABLE_HOSTED, [
1330 AC_ARG_ENABLE([hosted-libstdcxx],
1331 AC_HELP_STRING([--disable-hosted-libstdcxx],
1332 [only build freestanding C++ runtime support]),,
1333 [enable_hosted_libstdcxx=yes])
1334 if test "$enable_hosted_libstdcxx" = no; then
1335 AC_MSG_NOTICE([Only freestanding libraries will be built])
1339 enable_libstdcxx_pch=no
1344 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1345 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1346 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1351 dnl Check for template specializations for the 'long long' type extension.
1352 dnl The result determines only whether 'long long' I/O is enabled; things
1353 dnl like numeric_limits<> specializations are always available.
1355 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1356 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1357 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1358 dnl Where DEFAULT is either `yes' or `no'.
1359 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1361 AC_DEFUN(GLIBCXX_ENABLE_LONG_LONG, [
1362 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1367 AC_MSG_CHECKING([for enabled long long I/O support])
1368 # iostreams require strtoll, strtoull to compile
1369 AC_TRY_COMPILE([#include <stdlib.h>],
1370 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1371 AC_TRY_COMPILE([#include <stdlib.h>],
1372 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1374 # Option parsed, now set things appropriately
1375 if test $enable_long_long = yes; then
1376 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1378 AC_MSG_RESULT($enable_long_long)
1385 dnl Check to see if building and using a C++ precompiled header can be done.
1387 dnl --enable-libstdcxx-pch=yes
1388 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1389 dnl may work, after some light-hearted attempts to puzzle out compiler
1390 dnl support, flip bits on in include/Makefile.am
1392 dnl --disable-libstdcxx-pch
1393 dnl turns off attempts to use or build stdc++.h.gch.
1396 dnl glibcxx_PCHFLAGS
1398 AC_DEFUN(GLIBCXX_ENABLE_PCH, [
1399 AC_MSG_CHECKING([for enabled PCH])
1400 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1401 AC_MSG_RESULT([$enable_libstdcxx_pch])
1403 if test $enable_libstdcxx_pch = yes; then
1404 AC_CACHE_CHECK([for compiler with PCH support],
1405 [glibcxx_cv_prog_CXX_pch],
1406 [ac_save_CXXFLAGS="$CXXFLAGS"
1407 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1410 echo '#include <math.h>' > conftest.h
1411 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1412 -o conftest.h.gch 1>&5 2>&1 &&
1413 echo '#error "pch failed"' > conftest.h &&
1414 echo '#include "conftest.h"' > conftest.cc &&
1415 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1417 glibcxx_cv_prog_CXX_pch=yes
1419 glibcxx_cv_prog_CXX_pch=no
1422 CXXFLAGS=$ac_save_CXXFLAGS
1425 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1428 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1429 if test $enable_libstdcxx_pch = yes; then
1430 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1434 AC_SUBST(glibcxx_PCHFLAGS)
1439 dnl Check for exception handling support. If an explicit enable/disable
1440 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1441 dnl target may or may not support call frame exceptions.
1443 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1444 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1445 dnl Neither one forces an attempt at detection.
1448 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1450 AC_DEFUN(GLIBCXX_ENABLE_SJLJ_EXCEPTIONS, [
1451 AC_MSG_CHECKING([for exception model to use])
1454 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1455 [force use of builtin_setjmp for exceptions],
1456 [permit yes|no|auto])
1458 if test $enable_sjlj_exceptions = auto; then
1459 # Botheration. Now we've got to detect the exception model. Link tests
1460 # against libgcc.a are problematic since we've not been given proper -L
1461 # bits for single-tree newlib and libgloss.
1463 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1464 cat > conftest.$ac_ext << EOF
1465 [#]line __oline__ "configure"
1474 old_CXXFLAGS="$CXXFLAGS"
1476 if AC_TRY_EVAL(ac_compile); then
1477 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1478 enable_sjlj_exceptions=yes
1479 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1480 enable_sjlj_exceptions=no
1483 CXXFLAGS="$old_CXXFLAGS"
1487 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1488 # to two different models.
1489 case $enable_sjlj_exceptions in
1491 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1492 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1493 ac_exception_model_name=sjlj
1496 ac_exception_model_name="call frame"
1499 AC_MSG_ERROR([unable to detect exception model])
1503 AC_MSG_RESULT($ac_exception_model_name)
1508 dnl Add version tags to symbols in shared library (or not), additionally
1509 dnl marking other symbols as private/local (or not).
1511 dnl --enable-symvers=style adds a version script to the linker call when
1512 dnl creating the shared library. The choice of version script is
1513 dnl controlled by 'style'.
1514 dnl --disable-symvers does not.
1515 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1516 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1517 dnl choose a default style based on linker characteristics. Passing
1518 dnl 'no' disables versioning.
1520 AC_DEFUN(GLIBCXX_ENABLE_SYMVERS, [
1522 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1523 [enables symbol versioning of the shared library],
1524 [permit yes|no|gnu])
1526 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1527 # don't know enough about $LD to do tricks...
1528 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1529 # FIXME The following test is too strict, in theory.
1530 if test $enable_shared = no ||
1532 test x$glibcxx_gnu_ld_version = x; then
1536 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1537 if test $enable_symvers != no; then
1538 AC_MSG_CHECKING([for shared libgcc])
1539 ac_save_CFLAGS="$CFLAGS"
1541 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1542 CFLAGS="$ac_save_CFLAGS"
1543 AC_MSG_RESULT($glibcxx_shared_libgcc)
1546 # For GNU ld, we need at least this version. The format is described in
1547 # GLIBCXX_CHECK_LINKER_FEATURES above.
1548 glibcxx_min_gnu_ld_version=21400
1549 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1551 # Check to see if unspecified "yes" value can win, given results above.
1552 # Change "yes" into either "no" or a style name.
1553 if test $enable_symvers = yes; then
1554 if test $with_gnu_ld = yes &&
1555 test $glibcxx_shared_libgcc = yes;
1557 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1560 # The right tools, the right setup, but too old. Fallbacks?
1561 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1562 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1563 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1564 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1565 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1566 # Globbing fix is present, proper block support is not.
1567 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1568 dnl enable_symvers=???
1569 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1573 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1579 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1580 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1581 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1582 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1587 # Everything parsed; figure out what file to use.
1588 case $enable_symvers in
1590 SYMVER_MAP=config/linker-map.dummy
1593 SYMVER_MAP=config/linker-map.gnu
1594 AC_DEFINE(_GLIBCXX_SYMVER)
1598 AC_SUBST(SYMVER_MAP)
1599 AC_SUBST(port_specific_symbol_files)
1600 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1601 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1606 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1607 dnl We must stage the required headers so that they will be installed
1608 dnl with the library (unlike libgcc, the STL implementation is provided
1609 dnl solely within headers). Since we must not inject random user-space
1610 dnl macro names into user-provided C++ code, we first stage into <file>-in
1611 dnl and process to <file> with an output command. The reason for a two-
1612 dnl stage process here is to correctly handle $srcdir!=$objdir without
1613 dnl having to write complex code (the sed commands to clean the macro
1614 dnl namespace are complex and fragile enough as it is). We must also
1615 dnl add a relative path so that -I- is supported properly.
1618 dnl glibcxx_thread_h
1621 dnl HAVE_GTHR_DEFAULT
1622 dnl _GLIBCXX_SUPPORTS_WEAK
1624 AC_DEFUN(GLIBCXX_ENABLE_THREADS, [
1625 AC_MSG_CHECKING([for thread model used by GCC])
1626 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1627 AC_MSG_RESULT([$target_thread_file])
1629 if test $target_thread_file != single; then
1630 AC_DEFINE(HAVE_GTHR_DEFAULT)
1631 AC_DEFINE(_GLIBCXX_SUPPORTS_WEAK, __GXX_WEAK__)
1634 glibcxx_thread_h=gthr-$target_thread_file.h
1635 AC_SUBST(glibcxx_thread_h)
1639 # Check whether LC_MESSAGES is available in <locale.h>.
1640 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1642 # This file file be copied and used freely without restrictions. It can
1643 # be used in projects which are not available under the GNU Public License
1644 # but which still want to provide support for the GNU gettext functionality.
1645 # Please note that the actual code is *not* freely available.
1648 AC_DEFUN(AC_LC_MESSAGES, [
1649 AC_CHECK_HEADER(locale.h, [
1650 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1651 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1652 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1653 if test $ac_cv_val_LC_MESSAGES = yes; then
1654 AC_DEFINE(HAVE_LC_MESSAGES)
1660 sinclude([../libtool.m4])
1661 dnl The lines below arrange for aclocal not to bring an installed
1662 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1663 dnl add a definition of LIBTOOL to Makefile.in.
1664 ifelse(,,,[AC_SUBST(LIBTOOL)
1665 AC_DEFUN([AM_PROG_LIBTOOL])
1666 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1667 AC_DEFUN([AC_PROG_LD])
1670 dnl vim:et:ts=2:sw=2