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 Does any necessary configuration of the testsuite directory. Generates
577 dnl the testsuite_hooks.h header.
579 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
582 dnl enable_abi_check / GLIBCXX_TEST_ABI
586 AC_DEFUN(GLIBCXX_CONFIGURE_TESTSUITE, [
587 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
588 # Do checks for memory limit functions.
589 GLIBCXX_CHECK_SETRLIMIT
591 # Look for setenv, so that extended locale tests can be performed.
592 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
594 if test $enable_symvers = no; then
599 enable_abi_check=no ;;
601 enable_abi_check=yes ;;
605 # Only build this as native, since automake does not understand
610 # Export file names for ABI checking.
611 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
612 AC_SUBST(baseline_dir)
614 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
615 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
620 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
624 dnl TOPLEVEL_INCLUDES
626 AC_DEFUN(GLIBCXX_EXPORT_INCLUDES, [
627 # Used for every C++ compile we perform.
629 -I$glibcxx_builddir/include/$host_alias \
630 -I$glibcxx_builddir/include \
631 -I$glibcxx_srcdir/libsupc++"
633 # For Canadian crosses, pick this up too.
634 if test $CANADIAN = yes; then
635 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
638 # Stuff in the actual top level. Currently only used by libsupc++ to
639 # get unwind* headers from the gcc dir.
640 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
641 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
643 # Now, export this to all the little Makefiles....
644 AC_SUBST(GLIBCXX_INCLUDES)
645 AC_SUBST(TOPLEVEL_INCLUDES)
650 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
651 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
654 dnl OPTIMIZE_CXXFLAGS
657 AC_DEFUN(GLIBCXX_EXPORT_FLAGS, [
658 # Optimization flags that are probably a good idea for thrill-seekers. Just
659 # uncomment the lines below and make, everything else is ready to go...
660 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
662 AC_SUBST(OPTIMIZE_CXXFLAGS)
664 WARN_FLAGS='-Wall -W -Wwrite-strings -Wcast-qual'
670 dnl All installation directory information is determined here.
674 dnl glibcxx_prefixdir
675 dnl glibcxx_toolexecdir
676 dnl glibcxx_toolexeclibdir
678 dnl Assumes cross_compiling bits already done, and with_cross_host in
681 AC_DEFUN(GLIBCXX_EXPORT_INSTALL_INFO, [
682 glibcxx_toolexecdir=no
683 glibcxx_toolexeclibdir=no
684 glibcxx_prefixdir=$prefix
686 AC_MSG_CHECKING([for gxx-include-dir])
687 AC_ARG_WITH([gxx-include-dir],
688 AC_HELP_STRING([--with-gxx-include-dir=DIR],
689 [installation directory for include files]),
691 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
692 no) gxx_include_dir=no ;;
693 *) gxx_include_dir=$withval ;;
695 [gxx_include_dir=no])
696 AC_MSG_RESULT($gxx_include_dir)
698 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
699 AC_ARG_ENABLE([version-specific-runtime-libs],
700 AC_HELP_STRING([--enable-version-specific-runtime-libs],
701 [Specify that runtime libraries should be installed in a compiler-specific directory]),
702 [case "$enableval" in
703 yes) version_specific_libs=yes ;;
704 no) version_specific_libs=no ;;
705 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
707 [version_specific_libs=no])
708 AC_MSG_RESULT($version_specific_libs)
710 # Default case for install directory for include files.
711 if test $version_specific_libs = no && test $gxx_include_dir = no; then
712 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
715 # Version-specific runtime libs processing.
716 if test $version_specific_libs = yes; then
717 # Need the gcc compiler version to know where to install libraries
718 # and header files if --enable-version-specific-runtime-libs option
720 if test x"$gxx_include_dir" = x"no"; then
721 gxx_include_dir='${libdir}/gcc-lib/${host_alias}/'$gcc_version/include/c++
723 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
724 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
727 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
728 # Install a library built with a cross compiler in tooldir, not libdir.
729 if test x"$glibcxx_toolexecdir" = x"no"; then
730 if test -n "$with_cross_host" &&
731 test x"$with_cross_host" != x"no"; then
732 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
733 glibcxx_toolexeclibdir='${toolexecdir}/lib'
735 glibcxx_toolexecdir='${libdir}/gcc-lib/${host_alias}'
736 glibcxx_toolexeclibdir='${libdir}'
738 multi_os_directory=`$CXX -print-multi-os-directory`
739 case $multi_os_directory in
740 .) ;; # Avoid trailing /.
741 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
745 AC_MSG_CHECKING([for install location])
746 AC_MSG_RESULT($gxx_include_dir)
748 AC_SUBST(glibcxx_prefixdir)
749 AC_SUBST(gxx_include_dir)
750 AC_SUBST(glibcxx_toolexecdir)
751 AC_SUBST(glibcxx_toolexeclibdir)
757 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
758 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
759 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
761 dnl See docs/html/17_intro/configury.html#enable for documentation.
763 m4_define([GLIBCXX_ENABLE],[dnl
764 m4_define([_g_switch],[--enable-$1])dnl
765 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
766 AC_ARG_ENABLE($1,_g_help,
771 m4_bpatsubst([$5],[permit ])) ;;
772 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
773 dnl Idea for future: generate a URL pointing to
774 dnl "onlinedocs/configopts.html#whatever"
781 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
785 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
786 m4_undefine([_g_switch])dnl
787 m4_undefine([_g_help])dnl
792 dnl Check for ISO/IEC 9899:1999 "C99" support.
794 dnl --enable-c99 defines _GLIBCXX_USE_C99
795 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
796 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
797 dnl Where DEFAULT is either `yes' or `no'.
798 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
800 AC_DEFUN(GLIBCXX_ENABLE_C99, [
801 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
806 # Check for the existence of <math.h> functions used if C99 is enabled.
808 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
809 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
810 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
811 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
812 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
813 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
814 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
815 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
816 AC_TRY_COMPILE([#include <math.h>],
817 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
818 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
819 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
820 AC_TRY_COMPILE([#include <math.h>],
821 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
822 AC_TRY_COMPILE([#include <math.h>],
823 [isunordered(0.0,0.0);],, [ac_c99_math=no])
824 AC_MSG_RESULT($ac_c99_math)
826 # Check for the existence in <stdio.h> of vscanf, et. al.
828 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
829 AC_TRY_COMPILE([#include <stdio.h>],
830 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
831 AC_TRY_COMPILE([#include <stdio.h>
833 void foo(char* fmt, ...)
834 {va_list args; va_start(args, fmt);
835 vfscanf(stderr, "%i", args);}],
836 [],, [ac_c99_stdio=no])
837 AC_TRY_COMPILE([#include <stdio.h>
839 void foo(char* fmt, ...)
840 {va_list args; va_start(args, fmt);
841 vscanf("%i", args);}],
842 [],, [ac_c99_stdio=no])
843 AC_TRY_COMPILE([#include <stdio.h>
845 void foo(char* fmt, ...)
846 {va_list args; va_start(args, fmt);
847 vsnprintf(fmt, 0, "%i", args);}],
848 [],, [ac_c99_stdio=no])
849 AC_TRY_COMPILE([#include <stdio.h>
851 void foo(char* fmt, ...)
852 {va_list args; va_start(args, fmt);
853 vsscanf(fmt, "%i", args);}],
854 [],, [ac_c99_stdio=no])
855 AC_MSG_RESULT($ac_c99_stdio)
857 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
859 AC_MSG_CHECKING([for lldiv_t declaration])
860 AC_CACHE_VAL(ac_c99_lldiv_t, [
861 AC_TRY_COMPILE([#include <stdlib.h>],
863 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
865 AC_MSG_RESULT($ac_c99_lldiv_t)
867 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
868 AC_TRY_COMPILE([#include <stdlib.h>],
869 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
870 AC_TRY_COMPILE([#include <stdlib.h>],
871 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
872 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
873 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
874 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
875 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
876 if test x"$ac_c99_lldiv_t" = x"no"; then
879 AC_MSG_RESULT($ac_c99_stdlib)
881 # Check for the existence of <wchar.h> functions used if C99 is enabled.
882 # XXX the wchar.h checks should be rolled into the general C99 bits.
884 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
885 AC_TRY_COMPILE([#include <wchar.h>],
886 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
887 AC_TRY_COMPILE([#include <wchar.h>],
888 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
889 AC_TRY_COMPILE([#include <wchar.h>],
890 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
891 AC_MSG_RESULT($ac_c99_wchar)
893 AC_MSG_CHECKING([for enabled ISO C99 support])
894 if test x"$ac_c99_math" = x"no" ||
895 test x"$ac_c99_stdio" = x"no" ||
896 test x"$ac_c99_stdlib" = x"no" ||
897 test x"$ac_c99_wchar" = x"no"; then
900 AC_MSG_RESULT($enable_c99)
902 # Option parsed, now set things appropriately
903 if test x"$enable_c99" = x"yes"; then
904 AC_DEFINE(_GLIBCXX_USE_C99)
912 dnl Check for what type of C headers to use.
914 dnl --enable-cheaders= [does stuff].
915 dnl --disable-cheaders [does not do anything, really].
916 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
917 dnl Where DEFAULT is either `c' or `c_std'.
919 AC_DEFUN(GLIBCXX_ENABLE_CHEADERS, [
920 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
921 [construct "C" headers for g++], [permit c|c_std])
922 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
924 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
926 AC_SUBST(C_INCLUDE_DIR)
927 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
928 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
929 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
934 dnl Check for which locale library to use. The choice is mapped to
935 dnl a subdirectory of config/locale.
937 dnl Default is generic.
939 AC_DEFUN(GLIBCXX_ENABLE_CLOCALE, [
940 AC_MSG_CHECKING([for C locale to use])
941 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
942 [use MODEL for target locale package],
943 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
945 # If they didn't use this option switch, or if they specified --enable
946 # with no specific model, we'll have to look for one. If they
947 # specified --disable (???), do likewise.
948 if test $enable_clocale = no || test $enable_clocale = yes; then
952 # Either a known package, or "auto"
953 enable_clocale_flag=$enable_clocale
955 # Probe for locale support if no specific model is specified.
956 # Default to "generic".
957 if test $enable_clocale_flag = auto; then
958 case x${target_os} in
960 AC_EGREP_CPP([_GLIBCXX_ok], [
961 #include <features.h>
962 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
965 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
967 # Test for bugs early in glibc-2.2.x series
968 if test x$enable_clocale_flag = xgnu; then
970 #define _GNU_SOURCE 1
973 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
974 extern __typeof(newlocale) __newlocale;
975 extern __typeof(duplocale) __duplocale;
976 extern __typeof(strcoll_l) __strcoll_l;
980 const char __one[] = "Äuglein Augmen";
981 const char __two[] = "Äuglein";
986 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
987 loc_dup = __duplocale(loc);
988 i = __strcoll_l(__one, __two, loc);
989 j = __strcoll_l(__one, __two, loc_dup);
993 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
994 [enable_clocale_flag=generic])
997 # ... at some point put __strxfrm_l tests in as well.
1000 enable_clocale_flag=generic
1005 # Deal with gettext issues. Default to not using it (=no) until we detect
1006 # support for it later. Let the user turn it off via --e/d, but let that
1007 # default to on for easier handling.
1010 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1014 # Set configure bits for specified locale package
1015 case ${enable_clocale_flag} in
1017 AC_MSG_RESULT(generic)
1019 CLOCALE_H=config/locale/generic/c_locale.h
1020 CLOCALE_CC=config/locale/generic/c_locale.cc
1021 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1022 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1023 CCOLLATE_CC=config/locale/generic/collate_members.cc
1024 CCTYPE_CC=config/locale/generic/ctype_members.cc
1025 CMESSAGES_H=config/locale/generic/messages_members.h
1026 CMESSAGES_CC=config/locale/generic/messages_members.cc
1027 CMONEY_CC=config/locale/generic/monetary_members.cc
1028 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1029 CTIME_H=config/locale/generic/time_members.h
1030 CTIME_CC=config/locale/generic/time_members.cc
1031 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1036 # Declare intention to use gettext, and add support for specific
1038 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1041 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1042 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1043 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1046 # Export the build objects.
1047 for ling in $ALL_LINGUAS; do \
1048 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1049 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1051 AC_SUBST(glibcxx_MOFILES)
1052 AC_SUBST(glibcxx_POFILES)
1054 CLOCALE_H=config/locale/gnu/c_locale.h
1055 CLOCALE_CC=config/locale/gnu/c_locale.cc
1056 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1057 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1058 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1059 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1060 CMESSAGES_H=config/locale/gnu/messages_members.h
1061 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1062 CMONEY_CC=config/locale/gnu/monetary_members.cc
1063 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1064 CTIME_H=config/locale/gnu/time_members.h
1065 CTIME_CC=config/locale/gnu/time_members.cc
1066 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1069 AC_MSG_RESULT(IEEE 1003.1)
1071 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1072 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1073 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1074 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1075 CCOLLATE_CC=config/locale/generic/collate_members.cc
1076 CCTYPE_CC=config/locale/generic/ctype_members.cc
1077 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1078 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1079 CMONEY_CC=config/locale/generic/monetary_members.cc
1080 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1081 CTIME_H=config/locale/generic/time_members.h
1082 CTIME_CC=config/locale/generic/time_members.cc
1083 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1087 # This is where the testsuite looks for locale catalogs, using the
1088 # -DLOCALEDIR define during testsuite compilation.
1089 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1090 AC_SUBST(glibcxx_localedir)
1092 # A standalone libintl (e.g., GNU libintl) may be in use.
1093 if test $USE_NLS = yes; then
1094 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1095 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1097 if test $USE_NLS = yes; then
1098 AC_DEFINE(_GLIBCXX_USE_NLS)
1103 AC_SUBST(CCODECVT_H)
1104 AC_SUBST(CMESSAGES_H)
1105 AC_SUBST(CCODECVT_CC)
1106 AC_SUBST(CCOLLATE_CC)
1108 AC_SUBST(CMESSAGES_CC)
1110 AC_SUBST(CNUMERIC_CC)
1113 AC_SUBST(CLOCALE_CC)
1114 AC_SUBST(CLOCALE_INTERNAL_H)
1119 dnl Check for whether the Boost-derived checks should be turned on.
1121 dnl --enable-concept-checks turns them on.
1122 dnl --disable-concept-checks leaves them off.
1123 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1124 dnl Where DEFAULT is either `yes' or `no'.
1126 AC_DEFUN(GLIBCXX_ENABLE_CONCEPT_CHECKS, [
1127 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1128 if test $enable_concept_checks = yes; then
1129 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1135 dnl Check for which I/O library to use: stdio, or something specific.
1137 dnl Default is stdio.
1139 AC_DEFUN(GLIBCXX_ENABLE_CSTDIO, [
1140 AC_MSG_CHECKING([for underlying I/O to use])
1141 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1142 [use target-specific I/O package], [permit stdio])
1144 # Now that libio has been removed, you can have any color you want as long
1145 # as it's black. This is one big no-op until other packages are added, but
1146 # showing the framework never hurts.
1147 case ${enable_cstdio} in
1149 CSTDIO_H=config/io/c_io_stdio.h
1150 BASIC_FILE_H=config/io/basic_file_stdio.h
1151 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1152 AC_MSG_RESULT(stdio)
1156 dnl Set directory for fpos.h
1157 FPOS_H=$fpos_include_dir
1161 AC_SUBST(BASIC_FILE_H)
1162 AC_SUBST(BASIC_FILE_CC)
1167 dnl Check for "unusual" flags to pass to the compiler while building.
1169 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1170 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1171 dnl --disable-cxx-flags passes nothing.
1172 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1173 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1174 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1175 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1176 dnl If "default flags" is an empty string, the effect is the same
1177 dnl as --disable or --enable=no.
1179 AC_DEFUN(GLIBCXX_ENABLE_CXX_FLAGS, [dnl
1180 AC_MSG_CHECKING([for extra compiler flags for building])
1181 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1182 [pass compiler FLAGS when building library],
1183 [case "x$enable_cxx_flags" in
1184 xno | x) enable_cxx_flags= ;;
1186 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1189 # Run through flags (either default or command-line) and set anything
1190 # extra (e.g., #defines) that must accompany particular g++ options.
1191 if test -n "$enable_cxx_flags"; then
1192 for f in $enable_cxx_flags; do
1196 *) # and we're trying to pass /what/ exactly?
1197 AC_MSG_ERROR([compiler flags start with a -]) ;;
1202 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1203 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1204 AC_SUBST(EXTRA_CXX_FLAGS)
1209 dnl Check for wide character support. Has the same effect as the option
1210 dnl in gcc's configure, but in a form that autoconf can mess with.
1212 dnl --enable-c-mbchar requests all the wchar_t stuff.
1213 dnl --disable-c-mbchar doesn't.
1214 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1215 dnl Where DEFAULT is either `yes' or `no'.
1217 AC_DEFUN(GLIBCXX_ENABLE_C_MBCHAR, [
1218 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1219 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1224 dnl Check to see if debugging libraries are to be built.
1226 dnl --enable-libstdcxx-debug
1227 dnl builds a separate set of debugging libraries in addition to the
1228 dnl normal (shared, static) libstdc++ binaries.
1230 dnl --disable-libstdcxx-debug
1231 dnl builds only one (non-debug) version of libstdc++.
1233 dnl --enable-libstdcxx-debug-flags=FLAGS
1234 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1236 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1237 dnl Where DEFAULT is either `yes' or `no'.
1239 AC_DEFUN(GLIBCXX_ENABLE_DEBUG, [
1240 AC_MSG_CHECKING([for additional debug build])
1241 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1242 AC_MSG_RESULT($enable_libstdcxx_debug)
1243 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1248 dnl Check for explicit debug flags.
1250 dnl --enable-libstdcxx-debug-flags='-O1'
1251 dnl is a general method for passing flags to be used when
1252 dnl building debug libraries with --enable-debug.
1254 dnl --disable-libstdcxx-debug-flags does nothing.
1255 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1256 dnl If "default flags" is an empty string, the effect is the same
1257 dnl as --disable or --enable=no.
1259 AC_DEFUN(GLIBCXX_ENABLE_DEBUG_FLAGS, [
1260 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1261 [pass compiler FLAGS when building debug library],
1262 [case "x$enable_libstdcxx_debug_flags" in
1263 xno | x) enable_libstdcxx_debug_flags= ;;
1265 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1268 # Option parsed, now set things appropriately
1269 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1270 AC_SUBST(DEBUG_FLAGS)
1272 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1277 dnl Check if the user only wants a freestanding library implementation.
1279 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1280 dnl installing only the headers required by [17.4.1.3] and the language
1281 dnl support library. More than that will be built (to keep the Makefiles
1282 dnl conveniently clean), but not installed.
1285 dnl is_hosted (yes/no)
1288 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1290 AC_DEFUN(GLIBCXX_ENABLE_HOSTED, [
1291 AC_ARG_ENABLE([hosted-libstdcxx],
1292 AC_HELP_STRING([--disable-hosted-libstdcxx],
1293 [only build freestanding C++ runtime support]),,
1294 [enable_hosted_libstdcxx=yes])
1295 if test "$enable_hosted_libstdcxx" = no; then
1296 AC_MSG_NOTICE([Only freestanding libraries will be built])
1300 enable_libstdcxx_pch=no
1305 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1306 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1307 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1312 dnl Check for libunwind exception handling support. If enabled, then
1313 dnl we assume that the _Unwind_* functions that make up the Unwind ABI
1314 dnl (_Unwind_RaiseException, _Unwind_Resume, etc.) are defined by
1315 dnl libunwind instead of libgcc, and that libstdc++ has a dependency
1316 dnl on libunwind as well as libgcc.
1318 dnl --enable-libunwind-exceptions forces the use of libunwind.
1319 dnl --disable-libunwind-exceptions assumes there is no libunwind.
1324 AC_DEFUN(GLIBCXX_ENABLE_LIBUNWIND_EXCEPTIONS, [
1325 AC_MSG_CHECKING([for use of libunwind])
1326 GLIBCXX_ENABLE(libunwind-exceptions,no,,
1327 [force use of libunwind for exceptions])
1328 AC_MSG_RESULT($use_libunwind_exceptions)
1329 if test $enable_libunwind_exceptions = yes; then
1330 LIBUNWIND_FLAG="-lunwind"
1334 AC_SUBST(LIBUNWIND_FLAG)
1339 dnl Check for template specializations for the 'long long' type extension.
1340 dnl The result determines only whether 'long long' I/O is enabled; things
1341 dnl like numeric_limits<> specializations are always available.
1343 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1344 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1345 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1346 dnl Where DEFAULT is either `yes' or `no'.
1347 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1349 AC_DEFUN(GLIBCXX_ENABLE_LONG_LONG, [
1350 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1355 AC_MSG_CHECKING([for enabled long long I/O support])
1356 # iostreams require strtoll, strtoull to compile
1357 AC_TRY_COMPILE([#include <stdlib.h>],
1358 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1359 AC_TRY_COMPILE([#include <stdlib.h>],
1360 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1362 # Option parsed, now set things appropriately
1363 if test $enable_long_long = yes; then
1364 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1366 AC_MSG_RESULT($enable_long_long)
1373 dnl Check to see if building and using a C++ precompiled header can be done.
1375 dnl --enable-libstdcxx-pch=yes
1376 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1377 dnl may work, after some light-hearted attempts to puzzle out compiler
1378 dnl support, flip bits on in include/Makefile.am
1380 dnl --disable-libstdcxx-pch
1381 dnl turns off attempts to use or build stdc++.h.gch.
1384 dnl glibcxx_PCHFLAGS
1386 AC_DEFUN(GLIBCXX_ENABLE_PCH, [
1387 AC_MSG_CHECKING([for enabled PCH])
1388 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1389 AC_MSG_RESULT([$enable_libstdcxx_pch])
1391 if test $enable_libstdcxx_pch = yes; then
1392 AC_CACHE_CHECK([for compiler with PCH support],
1393 [glibcxx_cv_prog_CXX_pch],
1394 [ac_save_CXXFLAGS="$CXXFLAGS"
1395 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1398 echo '#include <math.h>' > conftest.h
1399 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1400 -o conftest.h.gch 1>&5 2>&1 &&
1401 echo '#error "pch failed"' > conftest.h &&
1402 echo '#include "conftest.h"' > conftest.cc &&
1403 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1405 glibcxx_cv_prog_CXX_pch=yes
1407 glibcxx_cv_prog_CXX_pch=no
1410 CXXFLAGS=$ac_save_CXXFLAGS
1413 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1416 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1417 if test $enable_libstdcxx_pch = yes; then
1418 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1422 AC_SUBST(glibcxx_PCHFLAGS)
1427 dnl Check for exception handling support. If an explicit enable/disable
1428 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1429 dnl target may or may not support call frame exceptions.
1431 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1432 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1433 dnl Neither one forces an attempt at detection.
1436 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1438 AC_DEFUN(GLIBCXX_ENABLE_SJLJ_EXCEPTIONS, [
1439 AC_MSG_CHECKING([for exception model to use])
1442 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1443 [force use of builtin_setjmp for exceptions],
1444 [permit yes|no|auto])
1446 if test $enable_sjlj_exceptions = auto; then
1447 # Botheration. Now we've got to detect the exception model. Link tests
1448 # against libgcc.a are problematic since we've not been given proper -L
1449 # bits for single-tree newlib and libgloss.
1451 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1452 cat > conftest.$ac_ext << EOF
1453 [#]line __oline__ "configure"
1462 old_CXXFLAGS="$CXXFLAGS"
1464 if AC_TRY_EVAL(ac_compile); then
1465 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1466 enable_sjlj_exceptions=yes
1467 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1468 enable_sjlj_exceptions=no
1471 CXXFLAGS="$old_CXXFLAGS"
1475 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1476 # to two different models.
1477 case $enable_sjlj_exceptions in
1479 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1480 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1481 ac_exception_model_name=sjlj
1484 ac_exception_model_name="call frame"
1487 AC_MSG_ERROR([unable to detect exception model])
1491 AC_MSG_RESULT($ac_exception_model_name)
1496 dnl Add version tags to symbols in shared library (or not), additionally
1497 dnl marking other symbols as private/local (or not).
1499 dnl --enable-symvers=style adds a version script to the linker call when
1500 dnl creating the shared library. The choice of version script is
1501 dnl controlled by 'style'.
1502 dnl --disable-symvers does not.
1503 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1504 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1505 dnl choose a default style based on linker characteristics. Passing
1506 dnl 'no' disables versioning.
1508 AC_DEFUN(GLIBCXX_ENABLE_SYMVERS, [
1510 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1511 [enables symbol versioning of the shared library],
1512 [permit yes|no|gnu])
1514 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1515 # don't know enough about $LD to do tricks...
1516 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1517 # FIXME The following test is too strict, in theory.
1518 if test $enable_shared = no ||
1520 test x$glibcxx_gnu_ld_version = x; then
1524 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1525 if test $enable_symvers != no; then
1526 AC_MSG_CHECKING([for shared libgcc])
1527 ac_save_CFLAGS="$CFLAGS"
1529 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1530 CFLAGS="$ac_save_CFLAGS"
1531 AC_MSG_RESULT($glibcxx_shared_libgcc)
1534 # For GNU ld, we need at least this version. The format is described in
1535 # GLIBCXX_CHECK_LINKER_FEATURES above.
1536 glibcxx_min_gnu_ld_version=21400
1537 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1539 # Check to see if unspecified "yes" value can win, given results above.
1540 # Change "yes" into either "no" or a style name.
1541 if test $enable_symvers = yes; then
1542 if test $with_gnu_ld = yes &&
1543 test $glibcxx_shared_libgcc = yes;
1545 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1548 # The right tools, the right setup, but too old. Fallbacks?
1549 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1550 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1551 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1552 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1553 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1554 # Globbing fix is present, proper block support is not.
1555 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1556 dnl enable_symvers=???
1557 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1561 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1567 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1568 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1569 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1570 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1575 # Everything parsed; figure out what file to use.
1576 case $enable_symvers in
1578 SYMVER_MAP=config/linker-map.dummy
1581 SYMVER_MAP=config/linker-map.gnu
1582 AC_DEFINE(_GLIBCXX_SYMVER)
1586 AC_SUBST(SYMVER_MAP)
1587 AC_SUBST(port_specific_symbol_files)
1588 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1589 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1594 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1595 dnl We must stage the required headers so that they will be installed
1596 dnl with the library (unlike libgcc, the STL implementation is provided
1597 dnl solely within headers). Since we must not inject random user-space
1598 dnl macro names into user-provided C++ code, we first stage into <file>-in
1599 dnl and process to <file> with an output command. The reason for a two-
1600 dnl stage process here is to correctly handle $srcdir!=$objdir without
1601 dnl having to write complex code (the sed commands to clean the macro
1602 dnl namespace are complex and fragile enough as it is). We must also
1603 dnl add a relative path so that -I- is supported properly.
1606 dnl glibcxx_thread_h
1609 dnl HAVE_GTHR_DEFAULT
1610 dnl _GLIBCXX_SUPPORTS_WEAK
1612 AC_DEFUN(GLIBCXX_ENABLE_THREADS, [
1613 AC_MSG_CHECKING([for thread model used by GCC])
1614 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1615 AC_MSG_RESULT([$target_thread_file])
1617 if test $target_thread_file != single; then
1618 AC_DEFINE(HAVE_GTHR_DEFAULT)
1619 AC_DEFINE(_GLIBCXX_SUPPORTS_WEAK, __GXX_WEAK__)
1622 glibcxx_thread_h=gthr-$target_thread_file.h
1623 AC_SUBST(glibcxx_thread_h)
1627 # Check whether LC_MESSAGES is available in <locale.h>.
1628 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1630 # This file file be copied and used freely without restrictions. It can
1631 # be used in projects which are not available under the GNU Public License
1632 # but which still want to provide support for the GNU gettext functionality.
1633 # Please note that the actual code is *not* freely available.
1636 AC_DEFUN(AC_LC_MESSAGES, [
1637 AC_CHECK_HEADER(locale.h, [
1638 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1639 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1640 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1641 if test $ac_cv_val_LC_MESSAGES = yes; then
1642 AC_DEFINE(HAVE_LC_MESSAGES)
1648 sinclude([../libtool.m4])
1649 dnl The lines below arrange for aclocal not to bring an installed
1650 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1651 dnl add a definition of LIBTOOL to Makefile.in.
1652 ifelse(,,,[AC_SUBST(LIBTOOL)
1653 AC_DEFUN([AM_PROG_LIBTOOL])
1654 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1655 AC_DEFUN([AC_PROG_LD])
1658 dnl vim:et:ts=2:sw=2