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 $glibcxx_cv_INT64_T = yes; then
587 AC_DEFINE(HAVE_INT64_T)
593 dnl Check whether LFS support is available.
595 AC_DEFUN([GLIBCXX_CHECK_LFS], [
598 ac_save_CXXFLAGS="$CXXFLAGS"
599 CXXFLAGS="$CXXFLAGS -fno-exceptions"
600 AC_CACHE_VAL(glibcxx_cv_LFS, [
607 fseeko64(fp, 0, SEEK_CUR);
609 lseek64(1, 0, SEEK_CUR);],
610 [glibcxx_cv_LFS=yes],
613 if test $glibcxx_cv_LFS = yes; then
614 AC_DEFINE(_GLIBCXX_USE_LFS)
616 CXXFLAGS="$ac_save_CXXFLAGS"
622 dnl Does any necessary configuration of the testsuite directory. Generates
623 dnl the testsuite_hooks.h header.
625 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
628 dnl enable_abi_check / GLIBCXX_TEST_ABI
632 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
633 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
634 # Do checks for memory limit functions.
635 GLIBCXX_CHECK_SETRLIMIT
637 # Look for setenv, so that extended locale tests can be performed.
638 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
640 if test $enable_symvers = no; then
645 enable_abi_check=no ;;
647 enable_abi_check=yes ;;
651 # Only build this as native, since automake does not understand
656 # Export file names for ABI checking.
657 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
658 AC_SUBST(baseline_dir)
660 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
661 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
666 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
670 dnl TOPLEVEL_INCLUDES
672 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
673 # Used for every C++ compile we perform.
675 -I$glibcxx_builddir/include/$host_alias \
676 -I$glibcxx_builddir/include \
677 -I$glibcxx_srcdir/libsupc++"
679 # For Canadian crosses, pick this up too.
680 if test $CANADIAN = yes; then
681 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
684 # Stuff in the actual top level. Currently only used by libsupc++ to
685 # get unwind* headers from the gcc dir.
686 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
687 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
689 # Now, export this to all the little Makefiles....
690 AC_SUBST(GLIBCXX_INCLUDES)
691 AC_SUBST(TOPLEVEL_INCLUDES)
696 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
697 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
700 dnl OPTIMIZE_CXXFLAGS
703 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
704 # Optimization flags that are probably a good idea for thrill-seekers. Just
705 # uncomment the lines below and make, everything else is ready to go...
706 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
708 AC_SUBST(OPTIMIZE_CXXFLAGS)
710 WARN_FLAGS='-Wall -W -Wwrite-strings -Wcast-qual'
716 dnl All installation directory information is determined here.
720 dnl glibcxx_prefixdir
721 dnl glibcxx_toolexecdir
722 dnl glibcxx_toolexeclibdir
724 dnl Assumes cross_compiling bits already done, and with_cross_host in
727 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
728 glibcxx_toolexecdir=no
729 glibcxx_toolexeclibdir=no
730 glibcxx_prefixdir=$prefix
732 AC_MSG_CHECKING([for gxx-include-dir])
733 AC_ARG_WITH([gxx-include-dir],
734 AC_HELP_STRING([--with-gxx-include-dir=DIR],
735 [installation directory for include files]),
737 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
738 no) gxx_include_dir=no ;;
739 *) gxx_include_dir=$withval ;;
741 [gxx_include_dir=no])
742 AC_MSG_RESULT($gxx_include_dir)
744 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
745 AC_ARG_ENABLE([version-specific-runtime-libs],
746 AC_HELP_STRING([--enable-version-specific-runtime-libs],
747 [Specify that runtime libraries should be installed in a compiler-specific directory]),
748 [case "$enableval" in
749 yes) version_specific_libs=yes ;;
750 no) version_specific_libs=no ;;
751 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
753 [version_specific_libs=no])
754 AC_MSG_RESULT($version_specific_libs)
756 # Default case for install directory for include files.
757 if test $version_specific_libs = no && test $gxx_include_dir = no; then
758 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
761 # Version-specific runtime libs processing.
762 if test $version_specific_libs = yes; then
763 # Need the gcc compiler version to know where to install libraries
764 # and header files if --enable-version-specific-runtime-libs option
765 # is selected. FIXME: these variables are misnamed, there are
766 # no executables installed in _toolexecdir or _toolexeclibdir.
767 if test x"$gxx_include_dir" = x"no"; then
768 gxx_include_dir='${libdir}/gcc/${host_alias}/'$gcc_version/include/c++
770 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
771 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
774 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
775 # Install a library built with a cross compiler in tooldir, not libdir.
776 if test x"$glibcxx_toolexecdir" = x"no"; then
777 if test -n "$with_cross_host" &&
778 test x"$with_cross_host" != x"no"; then
779 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
780 glibcxx_toolexeclibdir='${toolexecdir}/lib'
782 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
783 glibcxx_toolexeclibdir='${libdir}'
785 multi_os_directory=`$CXX -print-multi-os-directory`
786 case $multi_os_directory in
787 .) ;; # Avoid trailing /.
788 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
792 AC_MSG_CHECKING([for install location])
793 AC_MSG_RESULT($gxx_include_dir)
795 AC_SUBST(glibcxx_prefixdir)
796 AC_SUBST(gxx_include_dir)
797 AC_SUBST(glibcxx_toolexecdir)
798 AC_SUBST(glibcxx_toolexeclibdir)
804 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
805 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
806 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
808 dnl See docs/html/17_intro/configury.html#enable for documentation.
810 m4_define([GLIBCXX_ENABLE],[dnl
811 m4_define([_g_switch],[--enable-$1])dnl
812 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
813 AC_ARG_ENABLE($1,_g_help,
818 m4_bpatsubst([$5],[permit ])) ;;
819 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
820 dnl Idea for future: generate a URL pointing to
821 dnl "onlinedocs/configopts.html#whatever"
828 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
832 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
833 m4_undefine([_g_switch])dnl
834 m4_undefine([_g_help])dnl
839 dnl Check for ISO/IEC 9899:1999 "C99" support.
841 dnl --enable-c99 defines _GLIBCXX_USE_C99
842 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
843 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
844 dnl Where DEFAULT is either `yes' or `no'.
845 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
847 AC_DEFUN([GLIBCXX_ENABLE_C99], [
848 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
853 # Check for the existence of <math.h> functions used if C99 is enabled.
855 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
856 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
857 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
858 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
859 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
860 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
861 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
862 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
863 AC_TRY_COMPILE([#include <math.h>],
864 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
865 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
866 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
867 AC_TRY_COMPILE([#include <math.h>],
868 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
869 AC_TRY_COMPILE([#include <math.h>],
870 [isunordered(0.0,0.0);],, [ac_c99_math=no])
871 AC_MSG_RESULT($ac_c99_math)
873 if test x"$ac_c99_math" = x"yes"; then
874 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
877 # Check for the existence in <stdio.h> of vscanf, et. al.
879 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
880 AC_TRY_COMPILE([#include <stdio.h>],
881 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
882 AC_TRY_COMPILE([#include <stdio.h>
884 void foo(char* fmt, ...)
885 {va_list args; va_start(args, fmt);
886 vfscanf(stderr, "%i", args);}],
887 [],, [ac_c99_stdio=no])
888 AC_TRY_COMPILE([#include <stdio.h>
890 void foo(char* fmt, ...)
891 {va_list args; va_start(args, fmt);
892 vscanf("%i", args);}],
893 [],, [ac_c99_stdio=no])
894 AC_TRY_COMPILE([#include <stdio.h>
896 void foo(char* fmt, ...)
897 {va_list args; va_start(args, fmt);
898 vsnprintf(fmt, 0, "%i", args);}],
899 [],, [ac_c99_stdio=no])
900 AC_TRY_COMPILE([#include <stdio.h>
902 void foo(char* fmt, ...)
903 {va_list args; va_start(args, fmt);
904 vsscanf(fmt, "%i", args);}],
905 [],, [ac_c99_stdio=no])
906 AC_MSG_RESULT($ac_c99_stdio)
908 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
910 AC_MSG_CHECKING([for lldiv_t declaration])
911 AC_CACHE_VAL(ac_c99_lldiv_t, [
912 AC_TRY_COMPILE([#include <stdlib.h>],
914 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
916 AC_MSG_RESULT($ac_c99_lldiv_t)
918 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
919 AC_TRY_COMPILE([#include <stdlib.h>],
920 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
921 AC_TRY_COMPILE([#include <stdlib.h>],
922 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
923 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
924 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
925 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
926 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
927 if test x"$ac_c99_lldiv_t" = x"no"; then
930 AC_MSG_RESULT($ac_c99_stdlib)
932 # Check for the existence of <wchar.h> functions used if C99 is enabled.
933 # XXX the wchar.h checks should be rolled into the general C99 bits.
935 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
936 AC_TRY_COMPILE([#include <wchar.h>],
937 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
938 AC_TRY_COMPILE([#include <wchar.h>],
939 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
940 AC_TRY_COMPILE([#include <wchar.h>],
941 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
942 AC_MSG_RESULT($ac_c99_wchar)
944 AC_MSG_CHECKING([for enabled ISO C99 support])
945 if test x"$ac_c99_math" = x"no" ||
946 test x"$ac_c99_stdio" = x"no" ||
947 test x"$ac_c99_stdlib" = x"no" ||
948 test x"$ac_c99_wchar" = x"no"; then
951 AC_MSG_RESULT($enable_c99)
953 if test x"$ac_99_math" = x"yes"; then
954 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
957 # Option parsed, now set things appropriately
958 if test x"$enable_c99" = x"yes"; then
959 AC_DEFINE(_GLIBCXX_USE_C99)
967 dnl Check for what type of C headers to use.
969 dnl --enable-cheaders= [does stuff].
970 dnl --disable-cheaders [does not do anything, really].
971 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
972 dnl Where DEFAULT is either `c' or `c_std'.
974 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
975 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
976 [construct "C" headers for g++], [permit c|c_std])
977 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
979 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
981 AC_SUBST(C_INCLUDE_DIR)
982 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
983 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
984 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
989 dnl Check for which locale library to use. The choice is mapped to
990 dnl a subdirectory of config/locale.
992 dnl Default is generic.
994 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
995 AC_MSG_CHECKING([for C locale to use])
996 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
997 [use MODEL for target locale package],
998 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1000 # If they didn't use this option switch, or if they specified --enable
1001 # with no specific model, we'll have to look for one. If they
1002 # specified --disable (???), do likewise.
1003 if test $enable_clocale = no || test $enable_clocale = yes; then
1007 # Either a known package, or "auto"
1008 enable_clocale_flag=$enable_clocale
1010 # Probe for locale support if no specific model is specified.
1011 # Default to "generic".
1012 if test $enable_clocale_flag = auto; then
1013 case x${target_os} in
1014 xlinux* | xgnu* | xkfreebsd*-gnu | xknetbsd*-gnu)
1015 AC_EGREP_CPP([_GLIBCXX_ok], [
1016 #include <features.h>
1017 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1020 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1022 # Test for bugs early in glibc-2.2.x series
1023 if test x$enable_clocale_flag = xgnu; then
1025 #define _GNU_SOURCE 1
1028 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1029 extern __typeof(newlocale) __newlocale;
1030 extern __typeof(duplocale) __duplocale;
1031 extern __typeof(strcoll_l) __strcoll_l;
1035 const char __one[] = "Äuglein Augmen";
1036 const char __two[] = "Äuglein";
1041 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1042 loc_dup = __duplocale(loc);
1043 i = __strcoll_l(__one, __two, loc);
1044 j = __strcoll_l(__one, __two, loc_dup);
1048 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1049 [enable_clocale_flag=generic])
1052 # ... at some point put __strxfrm_l tests in as well.
1055 enable_clocale_flag=generic
1060 # Deal with gettext issues. Default to not using it (=no) until we detect
1061 # support for it later. Let the user turn it off via --e/d, but let that
1062 # default to on for easier handling.
1065 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1069 # Set configure bits for specified locale package
1070 case ${enable_clocale_flag} in
1072 AC_MSG_RESULT(generic)
1074 CLOCALE_H=config/locale/generic/c_locale.h
1075 CLOCALE_CC=config/locale/generic/c_locale.cc
1076 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1077 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1078 CCOLLATE_CC=config/locale/generic/collate_members.cc
1079 CCTYPE_CC=config/locale/generic/ctype_members.cc
1080 CMESSAGES_H=config/locale/generic/messages_members.h
1081 CMESSAGES_CC=config/locale/generic/messages_members.cc
1082 CMONEY_CC=config/locale/generic/monetary_members.cc
1083 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1084 CTIME_H=config/locale/generic/time_members.h
1085 CTIME_CC=config/locale/generic/time_members.cc
1086 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1091 # Declare intention to use gettext, and add support for specific
1093 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1096 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1097 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1098 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1101 # Export the build objects.
1102 for ling in $ALL_LINGUAS; do \
1103 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1104 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1106 AC_SUBST(glibcxx_MOFILES)
1107 AC_SUBST(glibcxx_POFILES)
1109 CLOCALE_H=config/locale/gnu/c_locale.h
1110 CLOCALE_CC=config/locale/gnu/c_locale.cc
1111 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1112 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1113 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1114 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1115 CMESSAGES_H=config/locale/gnu/messages_members.h
1116 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1117 CMONEY_CC=config/locale/gnu/monetary_members.cc
1118 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1119 CTIME_H=config/locale/gnu/time_members.h
1120 CTIME_CC=config/locale/gnu/time_members.cc
1121 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1124 AC_MSG_RESULT(IEEE 1003.1)
1126 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1127 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1128 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1129 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1130 CCOLLATE_CC=config/locale/generic/collate_members.cc
1131 CCTYPE_CC=config/locale/generic/ctype_members.cc
1132 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1133 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1134 CMONEY_CC=config/locale/generic/monetary_members.cc
1135 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1136 CTIME_H=config/locale/generic/time_members.h
1137 CTIME_CC=config/locale/generic/time_members.cc
1138 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1142 # This is where the testsuite looks for locale catalogs, using the
1143 # -DLOCALEDIR define during testsuite compilation.
1144 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1145 AC_SUBST(glibcxx_localedir)
1147 # A standalone libintl (e.g., GNU libintl) may be in use.
1148 if test $USE_NLS = yes; then
1149 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1150 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1152 if test $USE_NLS = yes; then
1153 AC_DEFINE(_GLIBCXX_USE_NLS)
1158 AC_SUBST(CCODECVT_H)
1159 AC_SUBST(CMESSAGES_H)
1160 AC_SUBST(CCODECVT_CC)
1161 AC_SUBST(CCOLLATE_CC)
1163 AC_SUBST(CMESSAGES_CC)
1165 AC_SUBST(CNUMERIC_CC)
1168 AC_SUBST(CLOCALE_CC)
1169 AC_SUBST(CLOCALE_INTERNAL_H)
1174 dnl Check for whether the Boost-derived checks should be turned on.
1176 dnl --enable-concept-checks turns them on.
1177 dnl --disable-concept-checks leaves them off.
1178 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1179 dnl Where DEFAULT is either `yes' or `no'.
1181 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1182 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1183 if test $enable_concept_checks = yes; then
1184 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1190 dnl Check for which I/O library to use: stdio, or something specific.
1192 dnl Default is stdio.
1194 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1195 AC_MSG_CHECKING([for underlying I/O to use])
1196 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1197 [use target-specific I/O package], [permit stdio])
1199 # Now that libio has been removed, you can have any color you want as long
1200 # as it's black. This is one big no-op until other packages are added, but
1201 # showing the framework never hurts.
1202 case ${enable_cstdio} in
1204 CSTDIO_H=config/io/c_io_stdio.h
1205 BASIC_FILE_H=config/io/basic_file_stdio.h
1206 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1207 AC_MSG_RESULT(stdio)
1212 AC_SUBST(BASIC_FILE_H)
1213 AC_SUBST(BASIC_FILE_CC)
1218 dnl Check for "unusual" flags to pass to the compiler while building.
1220 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1221 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1222 dnl --disable-cxx-flags passes nothing.
1223 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1224 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1225 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1226 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1227 dnl If "default flags" is an empty string, the effect is the same
1228 dnl as --disable or --enable=no.
1230 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1231 AC_MSG_CHECKING([for extra compiler flags for building])
1232 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1233 [pass compiler FLAGS when building library],
1234 [case "x$enable_cxx_flags" in
1235 xno | x) enable_cxx_flags= ;;
1237 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1240 # Run through flags (either default or command-line) and set anything
1241 # extra (e.g., #defines) that must accompany particular g++ options.
1242 if test -n "$enable_cxx_flags"; then
1243 for f in $enable_cxx_flags; do
1247 *) # and we're trying to pass /what/ exactly?
1248 AC_MSG_ERROR([compiler flags start with a -]) ;;
1253 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1254 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1255 AC_SUBST(EXTRA_CXX_FLAGS)
1260 dnl Check for wide character support. Has the same effect as the option
1261 dnl in gcc's configure, but in a form that autoconf can mess with.
1263 dnl --enable-c-mbchar requests all the wchar_t stuff.
1264 dnl --disable-c-mbchar doesn't.
1265 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1266 dnl Where DEFAULT is either `yes' or `no'.
1268 AC_DEFUN([GLIBCXX_ENABLE_C_MBCHAR], [
1269 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1270 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1275 dnl Check to see if debugging libraries are to be built.
1277 dnl --enable-libstdcxx-debug
1278 dnl builds a separate set of debugging libraries in addition to the
1279 dnl normal (shared, static) libstdc++ binaries.
1281 dnl --disable-libstdcxx-debug
1282 dnl builds only one (non-debug) version of libstdc++.
1284 dnl --enable-libstdcxx-debug-flags=FLAGS
1285 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1287 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1288 dnl Where DEFAULT is either `yes' or `no'.
1290 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1291 AC_MSG_CHECKING([for additional debug build])
1292 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1293 AC_MSG_RESULT($enable_libstdcxx_debug)
1294 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1299 dnl Check for explicit debug flags.
1301 dnl --enable-libstdcxx-debug-flags='-O1'
1302 dnl is a general method for passing flags to be used when
1303 dnl building debug libraries with --enable-debug.
1305 dnl --disable-libstdcxx-debug-flags does nothing.
1306 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1307 dnl If "default flags" is an empty string, the effect is the same
1308 dnl as --disable or --enable=no.
1310 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1311 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1312 [pass compiler FLAGS when building debug library],
1313 [case "x$enable_libstdcxx_debug_flags" in
1314 xno | x) enable_libstdcxx_debug_flags= ;;
1316 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1319 # Option parsed, now set things appropriately
1320 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1321 AC_SUBST(DEBUG_FLAGS)
1323 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1328 dnl Check if the user only wants a freestanding library implementation.
1330 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1331 dnl installing only the headers required by [17.4.1.3] and the language
1332 dnl support library. More than that will be built (to keep the Makefiles
1333 dnl conveniently clean), but not installed.
1336 dnl is_hosted (yes/no)
1339 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1341 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1342 AC_ARG_ENABLE([hosted-libstdcxx],
1343 AC_HELP_STRING([--disable-hosted-libstdcxx],
1344 [only build freestanding C++ runtime support]),,
1345 [enable_hosted_libstdcxx=yes])
1346 if test "$enable_hosted_libstdcxx" = no; then
1347 AC_MSG_NOTICE([Only freestanding libraries will be built])
1351 enable_libstdcxx_pch=no
1356 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1357 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1358 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1363 dnl Check for template specializations for the 'long long' type extension.
1364 dnl The result determines only whether 'long long' I/O is enabled; things
1365 dnl like numeric_limits<> specializations are always available.
1367 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1368 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1369 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1370 dnl Where DEFAULT is either `yes' or `no'.
1371 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1373 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1374 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1379 AC_MSG_CHECKING([for enabled long long I/O support])
1380 # iostreams require strtoll, strtoull to compile
1381 AC_TRY_COMPILE([#include <stdlib.h>],
1382 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1383 AC_TRY_COMPILE([#include <stdlib.h>],
1384 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1386 # Option parsed, now set things appropriately
1387 if test $enable_long_long = yes; then
1388 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1390 AC_MSG_RESULT($enable_long_long)
1397 dnl Check to see if building and using a C++ precompiled header can be done.
1399 dnl --enable-libstdcxx-pch=yes
1400 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1401 dnl may work, after some light-hearted attempts to puzzle out compiler
1402 dnl support, flip bits on in include/Makefile.am
1404 dnl --disable-libstdcxx-pch
1405 dnl turns off attempts to use or build stdc++.h.gch.
1408 dnl glibcxx_PCHFLAGS
1410 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1411 AC_MSG_CHECKING([for enabled PCH])
1412 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1413 AC_MSG_RESULT([$enable_libstdcxx_pch])
1415 if test $enable_libstdcxx_pch = yes; then
1416 AC_CACHE_CHECK([for compiler with PCH support],
1417 [glibcxx_cv_prog_CXX_pch],
1418 [ac_save_CXXFLAGS="$CXXFLAGS"
1419 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1422 echo '#include <math.h>' > conftest.h
1423 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1424 -o conftest.h.gch 1>&5 2>&1 &&
1425 echo '#error "pch failed"' > conftest.h &&
1426 echo '#include "conftest.h"' > conftest.cc &&
1427 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1429 glibcxx_cv_prog_CXX_pch=yes
1431 glibcxx_cv_prog_CXX_pch=no
1434 CXXFLAGS=$ac_save_CXXFLAGS
1437 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1440 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1441 if test $enable_libstdcxx_pch = yes; then
1442 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1446 AC_SUBST(glibcxx_PCHFLAGS)
1451 dnl Check for exception handling support. If an explicit enable/disable
1452 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1453 dnl target may or may not support call frame exceptions.
1455 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1456 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1457 dnl Neither one forces an attempt at detection.
1460 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1462 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1463 AC_MSG_CHECKING([for exception model to use])
1466 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1467 [force use of builtin_setjmp for exceptions],
1468 [permit yes|no|auto])
1470 if test $enable_sjlj_exceptions = auto; then
1471 # Botheration. Now we've got to detect the exception model. Link tests
1472 # against libgcc.a are problematic since we've not been given proper -L
1473 # bits for single-tree newlib and libgloss.
1475 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1476 cat > conftest.$ac_ext << EOF
1477 [#]line __oline__ "configure"
1486 old_CXXFLAGS="$CXXFLAGS"
1488 if AC_TRY_EVAL(ac_compile); then
1489 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1490 enable_sjlj_exceptions=yes
1491 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1492 enable_sjlj_exceptions=no
1495 CXXFLAGS="$old_CXXFLAGS"
1499 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1500 # to two different models.
1501 case $enable_sjlj_exceptions in
1503 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1504 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1505 ac_exception_model_name=sjlj
1508 ac_exception_model_name="call frame"
1511 AC_MSG_ERROR([unable to detect exception model])
1515 AC_MSG_RESULT($ac_exception_model_name)
1520 dnl Add version tags to symbols in shared library (or not), additionally
1521 dnl marking other symbols as private/local (or not).
1523 dnl --enable-symvers=style adds a version script to the linker call when
1524 dnl creating the shared library. The choice of version script is
1525 dnl controlled by 'style'.
1526 dnl --disable-symvers does not.
1527 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1528 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1529 dnl choose a default style based on linker characteristics. Passing
1530 dnl 'no' disables versioning.
1532 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1534 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1535 [enables symbol versioning of the shared library],
1536 [permit yes|no|gnu])
1538 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1539 # don't know enough about $LD to do tricks...
1540 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1541 # FIXME The following test is too strict, in theory.
1542 if test $enable_shared = no ||
1544 test x$glibcxx_gnu_ld_version = x; then
1548 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1549 if test $enable_symvers != no; then
1550 AC_MSG_CHECKING([for shared libgcc])
1551 ac_save_CFLAGS="$CFLAGS"
1553 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1554 CFLAGS="$ac_save_CFLAGS"
1555 AC_MSG_RESULT($glibcxx_shared_libgcc)
1558 # For GNU ld, we need at least this version. The format is described in
1559 # GLIBCXX_CHECK_LINKER_FEATURES above.
1560 glibcxx_min_gnu_ld_version=21400
1561 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1563 # Check to see if unspecified "yes" value can win, given results above.
1564 # Change "yes" into either "no" or a style name.
1565 if test $enable_symvers = yes; then
1566 if test $with_gnu_ld = yes &&
1567 test $glibcxx_shared_libgcc = yes;
1569 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1572 # The right tools, the right setup, but too old. Fallbacks?
1573 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1574 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1575 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1576 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1577 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1578 # Globbing fix is present, proper block support is not.
1579 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1580 dnl enable_symvers=???
1581 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1585 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1591 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1592 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1593 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1594 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1599 # Everything parsed; figure out what file to use.
1600 case $enable_symvers in
1602 SYMVER_MAP=config/linker-map.dummy
1605 SYMVER_MAP=config/linker-map.gnu
1606 AC_DEFINE(_GLIBCXX_SYMVER)
1610 AC_SUBST(SYMVER_MAP)
1611 AC_SUBST(port_specific_symbol_files)
1612 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1613 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1618 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1619 dnl We must stage the required headers so that they will be installed
1620 dnl with the library (unlike libgcc, the STL implementation is provided
1621 dnl solely within headers). Since we must not inject random user-space
1622 dnl macro names into user-provided C++ code, we first stage into <file>-in
1623 dnl and process to <file> with an output command. The reason for a two-
1624 dnl stage process here is to correctly handle $srcdir!=$objdir without
1625 dnl having to write complex code (the sed commands to clean the macro
1626 dnl namespace are complex and fragile enough as it is). We must also
1627 dnl add a relative path so that -I- is supported properly.
1630 dnl glibcxx_thread_h
1633 dnl HAVE_GTHR_DEFAULT
1635 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1636 AC_MSG_CHECKING([for thread model used by GCC])
1637 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1638 AC_MSG_RESULT([$target_thread_file])
1640 if test $target_thread_file != single; then
1641 AC_DEFINE(HAVE_GTHR_DEFAULT)
1644 glibcxx_thread_h=gthr-$target_thread_file.h
1645 AC_SUBST(glibcxx_thread_h)
1649 # Check whether LC_MESSAGES is available in <locale.h>.
1650 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1652 # This file file be copied and used freely without restrictions. It can
1653 # be used in projects which are not available under the GNU Public License
1654 # but which still want to provide support for the GNU gettext functionality.
1655 # Please note that the actual code is *not* freely available.
1658 AC_DEFUN([AC_LC_MESSAGES], [
1659 AC_CHECK_HEADER(locale.h, [
1660 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1661 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1662 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1663 if test $ac_cv_val_LC_MESSAGES = yes; then
1664 AC_DEFINE(HAVE_LC_MESSAGES)
1670 sinclude([../libtool.m4])
1671 dnl The lines below arrange for aclocal not to bring an installed
1672 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1673 dnl add a definition of LIBTOOL to Makefile.in.
1674 ifelse(,,,[AC_SUBST(LIBTOOL)
1675 AC_DEFUN([AM_PROG_LIBTOOL])
1676 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1677 AC_DEFUN([AC_PROG_LD])
1680 dnl vim:et:ts=2:sw=2