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 if test x"$ac_c99_math" = x"yes"; then
870 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
873 # Check for the existence in <stdio.h> of vscanf, et. al.
875 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
876 AC_TRY_COMPILE([#include <stdio.h>],
877 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
878 AC_TRY_COMPILE([#include <stdio.h>
880 void foo(char* fmt, ...)
881 {va_list args; va_start(args, fmt);
882 vfscanf(stderr, "%i", args);}],
883 [],, [ac_c99_stdio=no])
884 AC_TRY_COMPILE([#include <stdio.h>
886 void foo(char* fmt, ...)
887 {va_list args; va_start(args, fmt);
888 vscanf("%i", args);}],
889 [],, [ac_c99_stdio=no])
890 AC_TRY_COMPILE([#include <stdio.h>
892 void foo(char* fmt, ...)
893 {va_list args; va_start(args, fmt);
894 vsnprintf(fmt, 0, "%i", args);}],
895 [],, [ac_c99_stdio=no])
896 AC_TRY_COMPILE([#include <stdio.h>
898 void foo(char* fmt, ...)
899 {va_list args; va_start(args, fmt);
900 vsscanf(fmt, "%i", args);}],
901 [],, [ac_c99_stdio=no])
902 AC_MSG_RESULT($ac_c99_stdio)
904 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
906 AC_MSG_CHECKING([for lldiv_t declaration])
907 AC_CACHE_VAL(ac_c99_lldiv_t, [
908 AC_TRY_COMPILE([#include <stdlib.h>],
910 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
912 AC_MSG_RESULT($ac_c99_lldiv_t)
914 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
915 AC_TRY_COMPILE([#include <stdlib.h>],
916 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
917 AC_TRY_COMPILE([#include <stdlib.h>],
918 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
919 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
920 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
921 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
922 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
923 if test x"$ac_c99_lldiv_t" = x"no"; then
926 AC_MSG_RESULT($ac_c99_stdlib)
928 # Check for the existence of <wchar.h> functions used if C99 is enabled.
929 # XXX the wchar.h checks should be rolled into the general C99 bits.
931 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
932 AC_TRY_COMPILE([#include <wchar.h>],
933 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
934 AC_TRY_COMPILE([#include <wchar.h>],
935 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
936 AC_TRY_COMPILE([#include <wchar.h>],
937 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
938 AC_MSG_RESULT($ac_c99_wchar)
940 AC_MSG_CHECKING([for enabled ISO C99 support])
941 if test x"$ac_c99_math" = x"no" ||
942 test x"$ac_c99_stdio" = x"no" ||
943 test x"$ac_c99_stdlib" = x"no" ||
944 test x"$ac_c99_wchar" = x"no"; then
947 AC_MSG_RESULT($enable_c99)
949 if test x"$ac_99_math" = x"yes"; then
950 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
953 # Option parsed, now set things appropriately
954 if test x"$enable_c99" = x"yes"; then
955 AC_DEFINE(_GLIBCXX_USE_C99)
963 dnl Check for what type of C headers to use.
965 dnl --enable-cheaders= [does stuff].
966 dnl --disable-cheaders [does not do anything, really].
967 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
968 dnl Where DEFAULT is either `c' or `c_std'.
970 AC_DEFUN(GLIBCXX_ENABLE_CHEADERS, [
971 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
972 [construct "C" headers for g++], [permit c|c_std])
973 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
975 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
977 AC_SUBST(C_INCLUDE_DIR)
978 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
979 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
980 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
985 dnl Check for which locale library to use. The choice is mapped to
986 dnl a subdirectory of config/locale.
988 dnl Default is generic.
990 AC_DEFUN(GLIBCXX_ENABLE_CLOCALE, [
991 AC_MSG_CHECKING([for C locale to use])
992 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
993 [use MODEL for target locale package],
994 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
996 # If they didn't use this option switch, or if they specified --enable
997 # with no specific model, we'll have to look for one. If they
998 # specified --disable (???), do likewise.
999 if test $enable_clocale = no || test $enable_clocale = yes; then
1003 # Either a known package, or "auto"
1004 enable_clocale_flag=$enable_clocale
1006 # Probe for locale support if no specific model is specified.
1007 # Default to "generic".
1008 if test $enable_clocale_flag = auto; then
1009 case x${target_os} in
1010 xlinux* | xgnu* | xkfreebsd*-gnu | xknetbsd*-gnu)
1011 AC_EGREP_CPP([_GLIBCXX_ok], [
1012 #include <features.h>
1013 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1016 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1018 # Test for bugs early in glibc-2.2.x series
1019 if test x$enable_clocale_flag = xgnu; then
1021 #define _GNU_SOURCE 1
1024 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1025 extern __typeof(newlocale) __newlocale;
1026 extern __typeof(duplocale) __duplocale;
1027 extern __typeof(strcoll_l) __strcoll_l;
1031 const char __one[] = "Äuglein Augmen";
1032 const char __two[] = "Äuglein";
1037 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1038 loc_dup = __duplocale(loc);
1039 i = __strcoll_l(__one, __two, loc);
1040 j = __strcoll_l(__one, __two, loc_dup);
1044 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1045 [enable_clocale_flag=generic])
1048 # ... at some point put __strxfrm_l tests in as well.
1051 enable_clocale_flag=generic
1056 # Deal with gettext issues. Default to not using it (=no) until we detect
1057 # support for it later. Let the user turn it off via --e/d, but let that
1058 # default to on for easier handling.
1061 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1065 # Set configure bits for specified locale package
1066 case ${enable_clocale_flag} in
1068 AC_MSG_RESULT(generic)
1070 CLOCALE_H=config/locale/generic/c_locale.h
1071 CLOCALE_CC=config/locale/generic/c_locale.cc
1072 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1073 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1074 CCOLLATE_CC=config/locale/generic/collate_members.cc
1075 CCTYPE_CC=config/locale/generic/ctype_members.cc
1076 CMESSAGES_H=config/locale/generic/messages_members.h
1077 CMESSAGES_CC=config/locale/generic/messages_members.cc
1078 CMONEY_CC=config/locale/generic/monetary_members.cc
1079 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1080 CTIME_H=config/locale/generic/time_members.h
1081 CTIME_CC=config/locale/generic/time_members.cc
1082 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1087 # Declare intention to use gettext, and add support for specific
1089 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1092 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1093 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1094 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1097 # Export the build objects.
1098 for ling in $ALL_LINGUAS; do \
1099 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1100 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1102 AC_SUBST(glibcxx_MOFILES)
1103 AC_SUBST(glibcxx_POFILES)
1105 CLOCALE_H=config/locale/gnu/c_locale.h
1106 CLOCALE_CC=config/locale/gnu/c_locale.cc
1107 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1108 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1109 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1110 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1111 CMESSAGES_H=config/locale/gnu/messages_members.h
1112 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1113 CMONEY_CC=config/locale/gnu/monetary_members.cc
1114 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1115 CTIME_H=config/locale/gnu/time_members.h
1116 CTIME_CC=config/locale/gnu/time_members.cc
1117 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1120 AC_MSG_RESULT(IEEE 1003.1)
1122 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1123 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1124 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1125 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1126 CCOLLATE_CC=config/locale/generic/collate_members.cc
1127 CCTYPE_CC=config/locale/generic/ctype_members.cc
1128 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1129 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1130 CMONEY_CC=config/locale/generic/monetary_members.cc
1131 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1132 CTIME_H=config/locale/generic/time_members.h
1133 CTIME_CC=config/locale/generic/time_members.cc
1134 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1138 # This is where the testsuite looks for locale catalogs, using the
1139 # -DLOCALEDIR define during testsuite compilation.
1140 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1141 AC_SUBST(glibcxx_localedir)
1143 # A standalone libintl (e.g., GNU libintl) may be in use.
1144 if test $USE_NLS = yes; then
1145 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1146 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1148 if test $USE_NLS = yes; then
1149 AC_DEFINE(_GLIBCXX_USE_NLS)
1154 AC_SUBST(CCODECVT_H)
1155 AC_SUBST(CMESSAGES_H)
1156 AC_SUBST(CCODECVT_CC)
1157 AC_SUBST(CCOLLATE_CC)
1159 AC_SUBST(CMESSAGES_CC)
1161 AC_SUBST(CNUMERIC_CC)
1164 AC_SUBST(CLOCALE_CC)
1165 AC_SUBST(CLOCALE_INTERNAL_H)
1170 dnl Check for whether the Boost-derived checks should be turned on.
1172 dnl --enable-concept-checks turns them on.
1173 dnl --disable-concept-checks leaves them off.
1174 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1175 dnl Where DEFAULT is either `yes' or `no'.
1177 AC_DEFUN(GLIBCXX_ENABLE_CONCEPT_CHECKS, [
1178 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1179 if test $enable_concept_checks = yes; then
1180 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1186 dnl Check for which I/O library to use: stdio, or something specific.
1188 dnl Default is stdio.
1190 AC_DEFUN(GLIBCXX_ENABLE_CSTDIO, [
1191 AC_MSG_CHECKING([for underlying I/O to use])
1192 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1193 [use target-specific I/O package], [permit stdio])
1195 # Now that libio has been removed, you can have any color you want as long
1196 # as it's black. This is one big no-op until other packages are added, but
1197 # showing the framework never hurts.
1198 case ${enable_cstdio} in
1200 CSTDIO_H=config/io/c_io_stdio.h
1201 BASIC_FILE_H=config/io/basic_file_stdio.h
1202 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1203 AC_MSG_RESULT(stdio)
1208 AC_SUBST(BASIC_FILE_H)
1209 AC_SUBST(BASIC_FILE_CC)
1214 dnl Check for "unusual" flags to pass to the compiler while building.
1216 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1217 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1218 dnl --disable-cxx-flags passes nothing.
1219 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1220 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1221 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1222 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1223 dnl If "default flags" is an empty string, the effect is the same
1224 dnl as --disable or --enable=no.
1226 AC_DEFUN(GLIBCXX_ENABLE_CXX_FLAGS, [dnl
1227 AC_MSG_CHECKING([for extra compiler flags for building])
1228 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1229 [pass compiler FLAGS when building library],
1230 [case "x$enable_cxx_flags" in
1231 xno | x) enable_cxx_flags= ;;
1233 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1236 # Run through flags (either default or command-line) and set anything
1237 # extra (e.g., #defines) that must accompany particular g++ options.
1238 if test -n "$enable_cxx_flags"; then
1239 for f in $enable_cxx_flags; do
1243 *) # and we're trying to pass /what/ exactly?
1244 AC_MSG_ERROR([compiler flags start with a -]) ;;
1249 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1250 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1251 AC_SUBST(EXTRA_CXX_FLAGS)
1256 dnl Check for wide character support. Has the same effect as the option
1257 dnl in gcc's configure, but in a form that autoconf can mess with.
1259 dnl --enable-c-mbchar requests all the wchar_t stuff.
1260 dnl --disable-c-mbchar doesn't.
1261 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1262 dnl Where DEFAULT is either `yes' or `no'.
1264 AC_DEFUN(GLIBCXX_ENABLE_C_MBCHAR, [
1265 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1266 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1271 dnl Check to see if debugging libraries are to be built.
1273 dnl --enable-libstdcxx-debug
1274 dnl builds a separate set of debugging libraries in addition to the
1275 dnl normal (shared, static) libstdc++ binaries.
1277 dnl --disable-libstdcxx-debug
1278 dnl builds only one (non-debug) version of libstdc++.
1280 dnl --enable-libstdcxx-debug-flags=FLAGS
1281 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1283 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1284 dnl Where DEFAULT is either `yes' or `no'.
1286 AC_DEFUN(GLIBCXX_ENABLE_DEBUG, [
1287 AC_MSG_CHECKING([for additional debug build])
1288 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1289 AC_MSG_RESULT($enable_libstdcxx_debug)
1290 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1295 dnl Check for explicit debug flags.
1297 dnl --enable-libstdcxx-debug-flags='-O1'
1298 dnl is a general method for passing flags to be used when
1299 dnl building debug libraries with --enable-debug.
1301 dnl --disable-libstdcxx-debug-flags does nothing.
1302 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1303 dnl If "default flags" is an empty string, the effect is the same
1304 dnl as --disable or --enable=no.
1306 AC_DEFUN(GLIBCXX_ENABLE_DEBUG_FLAGS, [
1307 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1308 [pass compiler FLAGS when building debug library],
1309 [case "x$enable_libstdcxx_debug_flags" in
1310 xno | x) enable_libstdcxx_debug_flags= ;;
1312 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1315 # Option parsed, now set things appropriately
1316 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1317 AC_SUBST(DEBUG_FLAGS)
1319 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1324 dnl Check if the user only wants a freestanding library implementation.
1326 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1327 dnl installing only the headers required by [17.4.1.3] and the language
1328 dnl support library. More than that will be built (to keep the Makefiles
1329 dnl conveniently clean), but not installed.
1332 dnl is_hosted (yes/no)
1335 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1337 AC_DEFUN(GLIBCXX_ENABLE_HOSTED, [
1338 AC_ARG_ENABLE([hosted-libstdcxx],
1339 AC_HELP_STRING([--disable-hosted-libstdcxx],
1340 [only build freestanding C++ runtime support]),,
1341 [enable_hosted_libstdcxx=yes])
1342 if test "$enable_hosted_libstdcxx" = no; then
1343 AC_MSG_NOTICE([Only freestanding libraries will be built])
1347 enable_libstdcxx_pch=no
1352 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1353 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1354 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1359 dnl Check for template specializations for the 'long long' type extension.
1360 dnl The result determines only whether 'long long' I/O is enabled; things
1361 dnl like numeric_limits<> specializations are always available.
1363 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1364 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1365 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1366 dnl Where DEFAULT is either `yes' or `no'.
1367 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1369 AC_DEFUN(GLIBCXX_ENABLE_LONG_LONG, [
1370 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1375 AC_MSG_CHECKING([for enabled long long I/O support])
1376 # iostreams require strtoll, strtoull to compile
1377 AC_TRY_COMPILE([#include <stdlib.h>],
1378 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1379 AC_TRY_COMPILE([#include <stdlib.h>],
1380 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1382 # Option parsed, now set things appropriately
1383 if test $enable_long_long = yes; then
1384 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1386 AC_MSG_RESULT($enable_long_long)
1393 dnl Check to see if building and using a C++ precompiled header can be done.
1395 dnl --enable-libstdcxx-pch=yes
1396 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1397 dnl may work, after some light-hearted attempts to puzzle out compiler
1398 dnl support, flip bits on in include/Makefile.am
1400 dnl --disable-libstdcxx-pch
1401 dnl turns off attempts to use or build stdc++.h.gch.
1404 dnl glibcxx_PCHFLAGS
1406 AC_DEFUN(GLIBCXX_ENABLE_PCH, [
1407 AC_MSG_CHECKING([for enabled PCH])
1408 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1409 AC_MSG_RESULT([$enable_libstdcxx_pch])
1411 if test $enable_libstdcxx_pch = yes; then
1412 AC_CACHE_CHECK([for compiler with PCH support],
1413 [glibcxx_cv_prog_CXX_pch],
1414 [ac_save_CXXFLAGS="$CXXFLAGS"
1415 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1418 echo '#include <math.h>' > conftest.h
1419 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1420 -o conftest.h.gch 1>&5 2>&1 &&
1421 echo '#error "pch failed"' > conftest.h &&
1422 echo '#include "conftest.h"' > conftest.cc &&
1423 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1425 glibcxx_cv_prog_CXX_pch=yes
1427 glibcxx_cv_prog_CXX_pch=no
1430 CXXFLAGS=$ac_save_CXXFLAGS
1433 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1436 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1437 if test $enable_libstdcxx_pch = yes; then
1438 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1442 AC_SUBST(glibcxx_PCHFLAGS)
1447 dnl Check for exception handling support. If an explicit enable/disable
1448 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1449 dnl target may or may not support call frame exceptions.
1451 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1452 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1453 dnl Neither one forces an attempt at detection.
1456 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1458 AC_DEFUN(GLIBCXX_ENABLE_SJLJ_EXCEPTIONS, [
1459 AC_MSG_CHECKING([for exception model to use])
1462 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1463 [force use of builtin_setjmp for exceptions],
1464 [permit yes|no|auto])
1466 if test $enable_sjlj_exceptions = auto; then
1467 # Botheration. Now we've got to detect the exception model. Link tests
1468 # against libgcc.a are problematic since we've not been given proper -L
1469 # bits for single-tree newlib and libgloss.
1471 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1472 cat > conftest.$ac_ext << EOF
1473 [#]line __oline__ "configure"
1482 old_CXXFLAGS="$CXXFLAGS"
1484 if AC_TRY_EVAL(ac_compile); then
1485 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1486 enable_sjlj_exceptions=yes
1487 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1488 enable_sjlj_exceptions=no
1491 CXXFLAGS="$old_CXXFLAGS"
1495 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1496 # to two different models.
1497 case $enable_sjlj_exceptions in
1499 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1500 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1501 ac_exception_model_name=sjlj
1504 ac_exception_model_name="call frame"
1507 AC_MSG_ERROR([unable to detect exception model])
1511 AC_MSG_RESULT($ac_exception_model_name)
1516 dnl Add version tags to symbols in shared library (or not), additionally
1517 dnl marking other symbols as private/local (or not).
1519 dnl --enable-symvers=style adds a version script to the linker call when
1520 dnl creating the shared library. The choice of version script is
1521 dnl controlled by 'style'.
1522 dnl --disable-symvers does not.
1523 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1524 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1525 dnl choose a default style based on linker characteristics. Passing
1526 dnl 'no' disables versioning.
1528 AC_DEFUN(GLIBCXX_ENABLE_SYMVERS, [
1530 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1531 [enables symbol versioning of the shared library],
1532 [permit yes|no|gnu])
1534 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1535 # don't know enough about $LD to do tricks...
1536 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1537 # FIXME The following test is too strict, in theory.
1538 if test $enable_shared = no ||
1540 test x$glibcxx_gnu_ld_version = x; then
1544 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1545 if test $enable_symvers != no; then
1546 AC_MSG_CHECKING([for shared libgcc])
1547 ac_save_CFLAGS="$CFLAGS"
1549 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1550 CFLAGS="$ac_save_CFLAGS"
1551 AC_MSG_RESULT($glibcxx_shared_libgcc)
1554 # For GNU ld, we need at least this version. The format is described in
1555 # GLIBCXX_CHECK_LINKER_FEATURES above.
1556 glibcxx_min_gnu_ld_version=21400
1557 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1559 # Check to see if unspecified "yes" value can win, given results above.
1560 # Change "yes" into either "no" or a style name.
1561 if test $enable_symvers = yes; then
1562 if test $with_gnu_ld = yes &&
1563 test $glibcxx_shared_libgcc = yes;
1565 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1568 # The right tools, the right setup, but too old. Fallbacks?
1569 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1570 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1571 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1572 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1573 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1574 # Globbing fix is present, proper block support is not.
1575 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1576 dnl enable_symvers=???
1577 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1581 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1587 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1588 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1589 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1590 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1595 # Everything parsed; figure out what file to use.
1596 case $enable_symvers in
1598 SYMVER_MAP=config/linker-map.dummy
1601 SYMVER_MAP=config/linker-map.gnu
1602 AC_DEFINE(_GLIBCXX_SYMVER)
1606 AC_SUBST(SYMVER_MAP)
1607 AC_SUBST(port_specific_symbol_files)
1608 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1609 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1614 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1615 dnl We must stage the required headers so that they will be installed
1616 dnl with the library (unlike libgcc, the STL implementation is provided
1617 dnl solely within headers). Since we must not inject random user-space
1618 dnl macro names into user-provided C++ code, we first stage into <file>-in
1619 dnl and process to <file> with an output command. The reason for a two-
1620 dnl stage process here is to correctly handle $srcdir!=$objdir without
1621 dnl having to write complex code (the sed commands to clean the macro
1622 dnl namespace are complex and fragile enough as it is). We must also
1623 dnl add a relative path so that -I- is supported properly.
1626 dnl glibcxx_thread_h
1629 dnl HAVE_GTHR_DEFAULT
1630 dnl _GLIBCXX_SUPPORTS_WEAK
1632 AC_DEFUN(GLIBCXX_ENABLE_THREADS, [
1633 AC_MSG_CHECKING([for thread model used by GCC])
1634 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1635 AC_MSG_RESULT([$target_thread_file])
1637 if test $target_thread_file != single; then
1638 AC_DEFINE(HAVE_GTHR_DEFAULT)
1639 AC_DEFINE(_GLIBCXX_SUPPORTS_WEAK, __GXX_WEAK__)
1642 glibcxx_thread_h=gthr-$target_thread_file.h
1643 AC_SUBST(glibcxx_thread_h)
1647 # Check whether LC_MESSAGES is available in <locale.h>.
1648 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1650 # This file file be copied and used freely without restrictions. It can
1651 # be used in projects which are not available under the GNU Public License
1652 # but which still want to provide support for the GNU gettext functionality.
1653 # Please note that the actual code is *not* freely available.
1656 AC_DEFUN(AC_LC_MESSAGES, [
1657 AC_CHECK_HEADER(locale.h, [
1658 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1659 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1660 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1661 if test $ac_cv_val_LC_MESSAGES = yes; then
1662 AC_DEFINE(HAVE_LC_MESSAGES)
1668 sinclude([../libtool.m4])
1669 dnl The lines below arrange for aclocal not to bring an installed
1670 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1671 dnl add a definition of LIBTOOL to Makefile.in.
1672 ifelse(,,,[AC_SUBST(LIBTOOL)
1673 AC_DEFUN([AM_PROG_LIBTOOL])
1674 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1675 AC_DEFUN([AC_PROG_LD])
1678 dnl vim:et:ts=2:sw=2