2 dnl Initialize basic configure bits, set toplevel_srcdir for Makefiles.
4 dnl GLIBCXX_TOPREL_CONFIGURE
5 AC_DEFUN(GLIBCXX_TOPREL_CONFIGURE, [
6 dnl Default to --enable-multilib (this is also passed by default
7 dnl from the ubercommon-top-level configure)
8 AC_ARG_ENABLE(multilib,
9 [ --enable-multilib build hella library versions (default)],
10 [case "${enableval}" in
13 *) AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
14 esac], [multilib=yes])dnl
16 # When building with srcdir == objdir, links to the source files will
17 # be created in directories within the target_subdir. We have to
18 # adjust toplevel_srcdir accordingly, so that configure finds
19 # install-sh and other auxiliary files that live in the top-level
21 if test "${srcdir}" = "."; then
22 if test -z "${with_target_subdir}"; then
25 if test "${with_target_subdir}" != "."; then
26 toprel="${with_multisrctop}../.."
28 toprel="${with_multisrctop}.."
34 AC_CONFIG_AUX_DIR(${srcdir}/$toprel)
35 toplevel_srcdir=\${top_srcdir}/$toprel
36 AC_SUBST(toplevel_srcdir)
40 dnl Initialize the rest of the library configury.
43 AC_DEFUN(GLIBCXX_CONFIGURE, [
44 # Export build and source directories.
45 # These need to be absolute paths, yet at the same time need to
46 # canonicalize only relative paths, because then amd will not unmount
47 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
48 glibcxx_builddir=`${PWDCMD-pwd}`
50 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
51 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
53 AC_SUBST(glibcxx_builddir)
54 AC_SUBST(glibcxx_srcdir)
56 dnl This is here just to satisfy automake.
57 ifelse(not,equal,[AC_CONFIG_AUX_DIR(..)])
60 # Will set LN_S to either 'ln -s' or 'ln'. With autoconf 2.5x, can also
61 # be 'cp -p' if linking isn't available. Uncomment the next line to
62 # force a particular method.
63 #ac_cv_prog_LN_S='cp -p'
66 # We use these options to decide which functions to include.
67 AC_ARG_WITH(target-subdir,
68 [ --with-target-subdir=SUBDIR
69 configuring in a subdirectory])
70 AC_ARG_WITH(cross-host,
71 [ --with-cross-host=HOST configuring with a cross compiler])
74 [ --with-newlib Configuring with newlib])
76 glibcxx_basedir=$srcdir/$toprel/$1/libstdc++-v3
77 AC_SUBST(glibcxx_basedir)
79 # Never versions of autoconf add an underscore to these functions.
80 # Prevent future problems ...
81 ifdef([AC_PROG_CC_G],[],[define([AC_PROG_CC_G],defn([_AC_PROG_CC_G]))])
82 ifdef([AC_PROG_CC_GNU],[],[define([AC_PROG_CC_GNU],defn([_AC_PROG_CC_GNU]))])
83 ifdef([AC_PROG_CXX_G],[],[define([AC_PROG_CXX_G],defn([_AC_PROG_CXX_G]))])
84 ifdef([AC_PROG_CXX_GNU],[],[define([AC_PROG_CXX_GNU],defn([_AC_PROG_CXX_GNU]))])
87 # FIXME: We temporarily define our own version of AC_PROG_CC. This is
88 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS. We
89 # are probably using a cross compiler, which will not be able to fully
90 # link an executable. This is addressed in later versions of autoconf.
92 AC_DEFUN(LIB_AC_PROG_CC,
93 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
94 dnl Fool anybody using AC_PROG_CC.
95 AC_PROVIDE([AC_PROG_CC])
96 AC_CHECK_PROG(CC, gcc, gcc)
97 if test -z "$CC"; then
98 AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
99 test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
104 if test $ac_cv_prog_gcc = yes; then
106 dnl Check whether -g works, even if CFLAGS is set, in case the package
107 dnl plays around with CFLAGS (such as to build both debugging and
108 dnl normal versions of a library), tasteless as that idea is.
109 ac_test_CFLAGS="${CFLAGS+set}"
110 ac_save_CFLAGS="$CFLAGS"
113 if test "$ac_test_CFLAGS" = set; then
114 CFLAGS="$ac_save_CFLAGS"
115 elif test $ac_cv_prog_cc_g = yes; then
122 test "${CFLAGS+set}" = set || CFLAGS="-g"
128 # Likewise for AC_PROG_CXX. We can't just call it directly because g++
129 # will try to link in libstdc++.
130 AC_DEFUN(LIB_AC_PROG_CXX,
131 [AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
132 dnl Fool anybody using AC_PROG_CXX.
133 AC_PROVIDE([AC_PROG_CXX])
134 # Use glibcxx_CXX so that we do not cause CXX to be cached with the
135 # flags that come in CXX while configuring libstdc++. They're different
136 # from those used for all other target libraries. If CXX is set in
137 # the environment, respect that here.
139 AC_CHECK_PROGS(glibcxx_CXX, $CCC c++ g++ gcc CC cxx cc++, gcc)
140 AC_SUBST(glibcxx_CXX)
142 test -z "$glibcxx_CXX" && AC_MSG_ERROR([no acceptable c++ found in \$PATH])
146 if test $ac_cv_prog_gxx = yes; then
148 dnl Check whether -g works, even if CXXFLAGS is set, in case the package
149 dnl plays around with CXXFLAGS (such as to build both debugging and
150 dnl normal versions of a library), tasteless as that idea is.
151 ac_test_CXXFLAGS="${CXXFLAGS+set}"
152 ac_save_CXXFLAGS="$CXXFLAGS"
155 if test "$ac_test_CXXFLAGS" = set; then
156 CXXFLAGS="$ac_save_CXXFLAGS"
157 elif test $ac_cv_prog_cxx_g = yes; then
164 test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
170 # For directory versioning (e.g., headers) and other variables.
171 AC_MSG_CHECKING([for GCC version number])
172 gcc_version=`$glibcxx_CXX -dumpversion`
173 AC_MSG_RESULT($gcc_version)
175 # For some reason, gettext needs this.
178 AC_CHECK_TOOL(AS, as)
179 AC_CHECK_TOOL(AR, ar)
180 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
185 # We need AC_EXEEXT to keep automake happy in cygnus mode. However,
186 # at least currently, we never actually build a program, so we never
187 # need to use $(EXEEXT). Moreover, the test for EXEEXT normally
188 # fails, because we are probably configuring with a cross compiler
189 # which can't create executables. So we include AC_EXEEXT to keep
190 # automake happy, but we don't execute it, since we don't care about
193 # autoconf 2.50 runs AC_EXEEXT by default, and the macro expands
194 # to nothing, so nothing would remain between `then' and `fi' if it
195 # were not for the `:' below.
200 case [$]{glibcxx_basedir} in
201 /* | [A-Za-z]:[\\/]*) libgcj_flagbasedir=[$]{glibcxx_basedir} ;;
202 *) glibcxx_flagbasedir='[$](top_builddir)/'[$]{glibcxx_basedir} ;;
205 # Set up safe default values for all subsequent AM_CONDITIONAL tests.
215 # Find platform-specific directories containing configuration info. In
216 # addition to possibly modifying the same flags, it also sets up symlinks.
222 dnl Check to see if g++ can compile this library, and if so, if any version-
223 dnl specific precautions need to be taken.
225 dnl GLIBCXX_CHECK_COMPILER_VERSION
226 AC_DEFUN(GLIBCXX_CHECK_COMPILER_VERSION, [
227 if test ! -f stamp-sanity-compiler; then
228 AC_MSG_CHECKING([for g++ that will successfully compile libstdc++-v3])
235 ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to GCC 3.0 or above]))
237 AC_MSG_RESULT($gpp_satisfactory)
238 touch stamp-sanity-compiler
244 dnl Tests for newer compiler features, or features that are present in newer
245 dnl compiler versions but not older compiler versions still in use, should
248 dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the
249 dnl new inlining code or the new system_header pragma will die on -Werror.
250 dnl Leave it out by default and use maint-mode to use it.
252 dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if
253 dnl compiler supports it and the user has not requested debug mode.
255 dnl GLIBCXX_CHECK_COMPILER_FEATURES
256 AC_DEFUN(GLIBCXX_CHECK_COMPILER_FEATURES, [
257 # All these tests are for C++; save the language and the compiler flags.
258 # The CXXFLAGS thing is suspicious, but based on similar bits previously
259 # found in GLIBCXX_CONFIGURE.
262 ac_test_CXXFLAGS="${CXXFLAGS+set}"
263 ac_save_CXXFLAGS="$CXXFLAGS"
265 # Check for maintainer-mode bits.
266 if test x"$USE_MAINTAINER_MODE" = xno; then
272 # Check for -ffunction-sections -fdata-sections
273 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
274 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
275 AC_TRY_COMPILE(, [int foo;
276 ], [ac_fdsections=yes], [ac_fdsections=no])
277 if test "$ac_test_CXXFLAGS" = set; then
278 CXXFLAGS="$ac_save_CXXFLAGS"
280 # this is the suspicious part
283 if test x"$ac_fdsections" = x"yes"; then
284 SECTION_FLAGS='-ffunction-sections -fdata-sections'
286 AC_MSG_RESULT($ac_fdsections)
290 AC_SUBST(SECTION_FLAGS)
295 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
296 dnl the native linker is in use, all variables will be defined to something
297 dnl safe (like an empty string).
299 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
300 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
301 dnl Define LD, with_gnu_ld, and (possibly) glibcxx_gnu_ld_version as
302 dnl side-effects of testing.
304 dnl GLIBCXX_CHECK_LINKER_FEATURES
305 AC_DEFUN(GLIBCXX_CHECK_LINKER_FEATURES, [
306 # If we're not using GNU ld, then there's no point in even trying these
307 # tests. Check for that first. We should have already tested for gld
308 # by now (in libtool), but require it now just to be safe...
309 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
310 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
311 AC_REQUIRE([AC_PROG_LD])
313 # The name set by libtool depends on the version of libtool. Shame on us
314 # for depending on an impl detail, but c'est la vie. Older versions used
315 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
316 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
317 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
318 # set (hence we're using an older libtool), then set it.
319 if test x${with_gnu_ld+set} != xset; then
320 if test x${ac_cv_prog_gnu_ld+set} != xset; then
321 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
324 with_gnu_ld=$ac_cv_prog_gnu_ld
328 # Start by getting the version number. I think the libtool test already
329 # does some of this, but throws away the result.
331 ldver=`$LD --version 2>/dev/null | head -1 | \
332 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
334 glibcxx_gnu_ld_version=`echo $ldver | \
335 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
338 if test "$with_gnu_ld" = "notbroken"; then
339 # GNU ld it is! Joy and bunny rabbits!
341 # All these tests are for C++; save the language and the compiler flags.
342 # Need to do this so that g++ won't try to link in libstdc++
343 ac_test_CFLAGS="${CFLAGS+set}"
344 ac_save_CFLAGS="$CFLAGS"
345 CFLAGS='-x c++ -Wl,--gc-sections'
347 # Check for -Wl,--gc-sections
348 # XXX This test is broken at the moment, as symbols required for
349 # linking are now in libsupc++ (not built yet.....). In addition,
350 # this test has cored on solaris in the past. In addition,
351 # --gc-sections doesn't really work at the moment (keeps on discarding
352 # used sections, first .eh_frame and now some of the glibc sections for
353 # iconv). Bzzzzt. Thanks for playing, maybe next time.
354 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
362 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
363 if test "$ac_test_CFLAGS" = set; then
364 CFLAGS="$ac_save_CFLAGS"
366 # this is the suspicious part
369 if test "$ac_sectionLDflags" = "yes"; then
370 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
372 AC_MSG_RESULT($ac_sectionLDflags)
375 # Set linker optimization flags.
376 if test x"$with_gnu_ld" = x"yes"; then
377 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
380 AC_SUBST(SECTION_LDFLAGS)
381 AC_SUBST(OPT_LDFLAGS)
386 dnl Check to see if the (math function) argument passed is
387 dnl declared when using the c++ compiler
388 dnl ASSUMES argument is a math function with ONE parameter
390 dnl GLIBCXX_CHECK_MATH_DECL_1
391 AC_DEFUN(GLIBCXX_CHECK_MATH_DECL_1, [
392 AC_MSG_CHECKING([for $1 declaration])
393 if test x${glibcxx_cv_func_$1_use+set} != xset; then
394 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
397 AC_TRY_COMPILE([#include <math.h>
403 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
407 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
411 dnl Check to see if the (math function) argument passed is
412 dnl 1) declared when using the c++ compiler
413 dnl 2) has "C" linkage
414 dnl 3) if not, see if 1) and 2) for argument prepended with '_'
416 dnl Define HAVE_CARGF etc if "cargf" is declared and links
418 dnl argument 1 is name of function to check
420 dnl ASSUMES argument is a math function with ONE parameter
422 dnl GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1
423 AC_DEFUN(GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1, [
424 GLIBCXX_CHECK_MATH_DECL_1($1)
425 if test x$glibcxx_cv_func_$1_use = x"yes"; then
428 GLIBCXX_CHECK_MATH_DECL_1(_$1)
429 if test x$glibcxx_cv_func__$1_use = x"yes"; then
437 dnl Like GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1, but does a bunch of
438 dnl of functions at once. It's an all-or-nothing check -- either
439 dnl HAVE_XYZ is defined for each of the functions, or for none of them.
440 dnl Doing it this way saves significant configure time.
441 AC_DEFUN(GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1, [
442 AC_MSG_CHECKING([for $1 functions])
443 AC_CACHE_VAL(glibcxx_cv_func_$2_use, [
446 AC_TRY_COMPILE([#include <math.h>],
447 [ `for x in $3; do echo "$x (0);"; done` ],
448 [glibcxx_cv_func_$2_use=yes],
449 [glibcxx_cv_func_$2_use=no])
451 AC_MSG_RESULT($glibcxx_cv_func_$2_use)
452 if test x$glibcxx_cv_func_$2_use = x"yes"; then
458 dnl Check to see if the (math function) argument passed is
459 dnl declared when using the c++ compiler
460 dnl ASSUMES argument is a math function with TWO parameters
462 dnl GLIBCXX_CHECK_MATH_DECL_2
463 AC_DEFUN(GLIBCXX_CHECK_MATH_DECL_2, [
464 AC_MSG_CHECKING([for $1 declaration])
465 if test x${glibcxx_cv_func_$1_use+set} != xset; then
466 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
469 AC_TRY_COMPILE([#include <math.h>],
471 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
475 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
479 dnl Check to see if the (math function) argument passed is
480 dnl 1) declared when using the c++ compiler
481 dnl 2) has "C" linkage
483 dnl Define HAVE_CARGF etc if "cargf" is declared and links
485 dnl argument 1 is name of function to check
487 dnl ASSUMES argument is a math function with TWO parameters
489 dnl GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2
490 AC_DEFUN(GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2, [
491 GLIBCXX_CHECK_MATH_DECL_2($1)
492 if test x$glibcxx_cv_func_$1_use = x"yes"; then
495 GLIBCXX_CHECK_MATH_DECL_2(_$1)
496 if test x$glibcxx_cv_func__$1_use = x"yes"; then
504 dnl Check to see if the (math function) argument passed is
505 dnl declared when using the c++ compiler
506 dnl ASSUMES argument is a math function with THREE parameters
508 dnl GLIBCXX_CHECK_MATH_DECL_3
509 AC_DEFUN(GLIBCXX_CHECK_MATH_DECL_3, [
510 AC_MSG_CHECKING([for $1 declaration])
511 if test x${glibcxx_cv_func_$1_use+set} != xset; then
512 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
515 AC_TRY_COMPILE([#include <math.h>],
517 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
521 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
525 dnl Check to see if the (math function) argument passed is
526 dnl 1) declared when using the c++ compiler
527 dnl 2) has "C" linkage
529 dnl Define HAVE_CARGF etc if "cargf" is declared and links
531 dnl argument 1 is name of function to check
533 dnl ASSUMES argument is a math function with THREE parameters
535 dnl GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3
536 AC_DEFUN(GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3, [
537 GLIBCXX_CHECK_MATH_DECL_3($1)
538 if test x$glibcxx_cv_func_$1_use = x"yes"; then
541 GLIBCXX_CHECK_MATH_DECL_3(_$1)
542 if test x$glibcxx_cv_func__$1_use = x"yes"; then
550 dnl Check to see if the (stdlib function) argument passed is
551 dnl 1) declared when using the c++ compiler
552 dnl 2) has "C" linkage
554 dnl argument 1 is name of function to check
556 dnl ASSUMES argument is a math function with TWO parameters
558 dnl GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2
559 AC_DEFUN(GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
560 AC_MSG_CHECKING([for $1 declaration])
561 if test x${glibcxx_cv_func_$1_use+set} != xset; then
562 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
565 AC_TRY_COMPILE([#include <stdlib.h>],
567 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
571 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
572 if test x$glibcxx_cv_func_$1_use = x"yes"; then
579 dnl Check to see if the (stdlib function) argument passed is
580 dnl 1) declared when using the c++ compiler
581 dnl 2) has "C" linkage
583 dnl argument 1 is name of function to check
585 dnl ASSUMES argument is a function with THREE parameters
587 dnl GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3
588 AC_DEFUN(GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3, [
589 AC_MSG_CHECKING([for $1 declaration])
590 if test x${glibcxx_cv_func_$1_use+set} != xset; then
591 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
594 AC_TRY_COMPILE([#include <stdlib.h>],
596 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
600 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
601 if test x$glibcxx_cv_func_$1_use = x"yes"; then
607 dnl Because the builtins are picky picky picky about the arguments they take,
608 dnl do an explict linkage tests here.
609 dnl Check to see if the (math function) argument passed is
610 dnl 1) declared when using the c++ compiler
611 dnl 2) has "C" linkage
613 dnl Define HAVE_CARGF etc if "cargf" is declared and links
615 dnl argument 1 is name of function to check
617 dnl ASSUMES argument is a math function with ONE parameter
619 dnl GLIBCXX_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
620 AC_DEFUN(GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
621 AC_MSG_CHECKING([for $1 declaration])
622 if test x${glibcxx_cv_func_$1_use+set} != xset; then
623 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
626 AC_TRY_COMPILE([#include <math.h>],
628 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
632 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
633 if test x$glibcxx_cv_func_$1_use = x"yes"; then
634 AC_MSG_CHECKING([for $1 linkage])
635 if test x${glibcxx_cv_func_$1_link+set} != xset; then
636 AC_CACHE_VAL(glibcxx_cv_func_$1_link, [
637 AC_TRY_LINK([#include <math.h>],
639 [glibcxx_cv_func_$1_link=yes], [glibcxx_cv_func_$1_link=no])
642 AC_MSG_RESULT($glibcxx_cv_func_$1_link)
643 if test x$glibcxx_cv_func_$1_link = x"yes"; then
644 ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
645 AC_DEFINE_UNQUOTED(${ac_tr_func})
652 dnl Check to see what builtin math functions are supported
654 dnl check for __builtin_abs
655 dnl check for __builtin_fabsf
656 dnl check for __builtin_fabs
657 dnl check for __builtin_fabl
658 dnl check for __builtin_labs
659 dnl check for __builtin_sqrtf
660 dnl check for __builtin_sqrtl
661 dnl check for __builtin_sqrt
662 dnl check for __builtin_sinf
663 dnl check for __builtin_sin
664 dnl check for __builtin_sinl
665 dnl check for __builtin_cosf
666 dnl check for __builtin_cos
667 dnl check for __builtin_cosl
669 dnl GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
670 AC_DEFUN(GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT, [
671 dnl Test for builtin math functions.
672 dnl These are made in gcc/c-common.c
673 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
674 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
675 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
676 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
677 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
679 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
680 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrt)
681 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
683 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
684 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
685 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
687 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
688 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
689 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
691 dnl There is, without a doubt, a more elegant way to have these
692 dnl names exported so that they won't be stripped out of acconfig.h by
693 dnl autoheader. I leave this as an exercise to somebody less frustrated
694 dnl than I.... please email the libstdc++ list if you can figure out a
695 dnl more elegant approach (see autoconf/acgen.m4 and specifically
696 dnl AC_CHECK_FUNC for things to steal.)
698 if test x$dummyvar = x"yes"; then
699 AC_DEFINE(HAVE___BUILTIN_ABS)
700 AC_DEFINE(HAVE___BUILTIN_LABS)
701 AC_DEFINE(HAVE___BUILTIN_COS)
702 AC_DEFINE(HAVE___BUILTIN_COSF)
703 AC_DEFINE(HAVE___BUILTIN_COSL)
704 AC_DEFINE(HAVE___BUILTIN_FABS)
705 AC_DEFINE(HAVE___BUILTIN_FABSF)
706 AC_DEFINE(HAVE___BUILTIN_FABSL)
707 AC_DEFINE(HAVE___BUILTIN_SIN)
708 AC_DEFINE(HAVE___BUILTIN_SINF)
709 AC_DEFINE(HAVE___BUILTIN_SINL)
710 AC_DEFINE(HAVE___BUILTIN_SQRT)
711 AC_DEFINE(HAVE___BUILTIN_SQRTF)
712 AC_DEFINE(HAVE___BUILTIN_SQRTL)
717 dnl Check to see what the underlying c library is like
718 dnl These checks need to do two things:
719 dnl 1) make sure the name is declared when using the c++ compiler
720 dnl 2) make sure the name has "C" linkage
721 dnl This might seem like overkill but experience has shown that it's not...
723 dnl Define HAVE_STRTOLD if "strtold" is declared and links
724 dnl Define HAVE_STRTOF if "strtof" is declared and links
725 dnl Define HAVE_DRAND48 if "drand48" is declared and links
727 dnl GLIBCXX_CHECK_STDLIB_SUPPORT
728 AC_DEFUN(GLIBCXX_CHECK_STDLIB_SUPPORT, [
729 ac_test_CXXFLAGS="${CXXFLAGS+set}"
730 ac_save_CXXFLAGS="$CXXFLAGS"
731 CXXFLAGS='-fno-builtin -D_GNU_SOURCE'
733 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
734 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtof)
735 AC_CHECK_FUNCS(drand48)
737 CXXFLAGS="$ac_save_CXXFLAGS"
741 dnl Check to see what the underlying c library or math library is like.
742 dnl These checks need to do two things:
743 dnl 1) make sure the name is declared when using the c++ compiler
744 dnl 2) make sure the name has "C" linkage
745 dnl This might seem like overkill but experience has shown that it's not...
747 dnl Define HAVE_CARGF etc if "cargf" is found.
749 dnl GLIBCXX_CHECK_MATH_SUPPORT
750 AC_DEFUN(GLIBCXX_CHECK_MATH_SUPPORT, [
751 ac_test_CXXFLAGS="${CXXFLAGS+set}"
752 ac_save_CXXFLAGS="$CXXFLAGS"
753 CXXFLAGS='-fno-builtin -D_GNU_SOURCE'
756 AC_CHECK_LIB(m, sin, libm="-lm")
760 dnl Check to see if certain C math functions exist.
761 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
762 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
763 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
764 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
765 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
766 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
767 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
768 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(hypot)
770 dnl Check to see if basic C math functions have float versions.
771 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
776 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
779 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(expf)
780 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
781 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
782 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(atan2f)
783 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
784 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
785 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
786 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(hypotf)
787 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
788 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
789 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
790 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
791 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
792 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
793 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
794 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
796 dnl Check to see if basic C math functions have long double versions.
797 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
802 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
805 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
806 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
807 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
808 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
809 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
810 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
811 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
812 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
813 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(hypotl)
814 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
815 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
816 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
817 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
818 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
819 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
820 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
821 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
823 dnl Some runtimes have these functions with a preceding underscore. Please
824 dnl keep this sync'd with the one above. And if you add any new symbol,
825 dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
826 dnl Check to see if certain C math functions exist.
828 dnl Check to see if basic C math functions have float versions.
829 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig,
831 _acosf _asinf _atanf \
833 _coshf _sinhf _tanhf)
834 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round,
838 dnl Check to see if basic C math functions have long double versions.
839 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig,
841 _acosl _asinl _atanl \
843 _coshl _sinhl _tanhl)
844 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round,
849 CXXFLAGS="$ac_save_CXXFLAGS"
854 dnl Check to see if there is native support for complex
856 dnl Don't compile bits in math/* if native support exits.
858 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "copysignl" is found.
860 dnl GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT
861 AC_DEFUN(GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT, [
862 dnl Check for complex versions of math functions of platform. This will
863 dnl always pass if libm is available, and fail if it isn't. If it is
864 dnl available, we assume we'll need it later, so add it to LIBS.
865 AC_CHECK_LIB(m, main)
866 AC_REPLACE_MATHFUNCS(nan copysignf)
868 dnl For __signbit to signbit conversions.
869 AC_CHECK_FUNCS([__signbit], , [LIBMATHOBJS="$LIBMATHOBJS signbit.lo"])
870 AC_CHECK_FUNCS([__signbitf], , [LIBMATHOBJS="$LIBMATHOBJS signbitf.lo"])
872 dnl Compile the long double complex functions only if the function
873 dnl provides the non-complex long double functions that are needed.
874 dnl Currently this includes copysignl, which should be
875 dnl cached from the GLIBCXX_CHECK_MATH_SUPPORT macro, above.
876 if test x$ac_cv_func_copysignl = x"yes"; then
877 AC_CHECK_FUNCS([__signbitl], , [LIBMATHOBJS="$LIBMATHOBJS signbitl.lo"])
880 if test -n "$LIBMATHOBJS"; then
883 AC_SUBST(LIBMATHOBJS)
887 dnl Check to see what architecture and operating system we are compiling
888 dnl for. Also, if architecture- or OS-specific flags are required for
889 dnl compilation, pick them up here.
891 dnl GLIBCXX_CHECK_HOST
892 AC_DEFUN(GLIBCXX_CHECK_HOST, [
893 . [$]{glibcxx_basedir}/configure.host
894 AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
895 AC_MSG_RESULT(OS config directory is $os_include_dir)
900 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
901 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
902 dnl must have been previously checked.)
904 dnl Define _GLIBCXX_USE_WCHAR_T if all the bits are found
905 dnl Define HAVE_MBSTATE_T if mbstate_t is not in wchar.h
907 dnl GLIBCXX_CHECK_WCHAR_T_SUPPORT
908 AC_DEFUN(GLIBCXX_CHECK_WCHAR_T_SUPPORT, [
909 dnl Wide characters disabled by default.
911 dnl Test wchar.h for mbstate_t, which is needed for char_traits and
912 dnl others even if wchar_t support is not on.
913 AC_MSG_CHECKING([for mbstate_t])
914 AC_TRY_COMPILE([#include <wchar.h>],
915 [mbstate_t teststate;],
916 have_mbstate_t=yes, have_mbstate_t=no)
917 AC_MSG_RESULT($have_mbstate_t)
918 if test x"$have_mbstate_t" = xyes; then
919 AC_DEFINE(HAVE_MBSTATE_T)
922 dnl Sanity check for existence of ISO C99 headers for extended encoding.
923 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
924 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
926 dnl Only continue checking if the ISO C99 headers exist and support is on.
927 if test x"$ac_has_wchar_h" = xyes &&
928 test x"$ac_has_wctype_h" = xyes &&
929 test x"$enable_c_mbchar" != xno; then
931 dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
932 dnl numeric_limits can instantiate type_traits<wchar_t>
933 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
934 AC_TRY_COMPILE([#include <wchar.h>],
935 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
936 has_wchar_minmax=yes, has_wchar_minmax=no)
937 AC_MSG_RESULT($has_wchar_minmax)
939 dnl Test wchar.h for WEOF, which is what we use to determine whether
940 dnl to specialize for char_traits<wchar_t> or not.
941 AC_MSG_CHECKING([for WEOF])
944 #include <stddef.h>],
946 has_weof=yes, has_weof=no)
947 AC_MSG_RESULT($has_weof)
949 dnl Tests for wide character functions used in char_traits<wchar_t>.
951 AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset,, \
954 dnl Checks for names injected into std:: by the c_std headers.
955 AC_CHECK_FUNCS(btowc wctob fgetwc fgetws fputwc fputws fwide \
956 fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
957 vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
958 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
959 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
960 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr,, \
963 AC_MSG_CHECKING([for ISO C99 wchar_t support])
964 if test x"$has_weof" = xyes &&
965 test x"$has_wchar_minmax" = xyes &&
966 test x"$ac_wfuncs" = xyes; then
967 ac_isoC99_wchar_t=yes
971 AC_MSG_RESULT($ac_isoC99_wchar_t)
973 dnl Use iconv for wchar_t to char conversions. As such, check for
974 dnl X/Open Portability Guide, version 2 features (XPG2).
975 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
976 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
978 dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
979 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
981 LIBS="$LIBS $libiconv"
983 AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
984 ac_XPG2funcs=yes, ac_XPG2funcs=no)
988 AC_MSG_CHECKING([for XPG2 wchar_t support])
989 if test x"$ac_has_iconv_h" = xyes &&
990 test x"$ac_has_langinfo_h" = xyes &&
991 test x"$ac_XPG2funcs" = xyes; then
996 AC_MSG_RESULT($ac_XPG2_wchar_t)
998 dnl At the moment, only enable wchar_t specializations if all the
999 dnl above support is present.
1000 if test x"$ac_isoC99_wchar_t" = xyes &&
1001 test x"$ac_XPG2_wchar_t" = xyes; then
1002 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
1006 AC_MSG_CHECKING([for enabled wchar_t specializations])
1007 AC_MSG_RESULT($enable_wchar_t)
1012 dnl Check to see if debugging libraries are to be built.
1014 dnl GLIBCXX_ENABLE_DEBUG
1016 dnl --enable-libstdcxx-debug
1017 dnl builds a separate set of debugging libraries in addition to the
1018 dnl normal (shared, static) libstdc++ binaries.
1020 dnl --disable-libstdcxx-debug
1021 dnl builds only one (non-debug) version of libstdc++.
1023 dnl --enable-libstdcxx-debug-flags=FLAGS
1024 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1026 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1027 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1028 dnl defaults to `no'.
1029 AC_DEFUN(GLIBCXX_ENABLE_DEBUG, [dnl
1030 define([GLIBCXX_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
1031 AC_ARG_ENABLE(libstdcxx_debug,
1032 changequote(<<, >>)dnl
1033 << --enable-libstdcxx-debug build extra debug library [default=>>GLIBCXX_ENABLE_DEBUG_DEFAULT],
1034 changequote([, ])dnl
1035 [case "${enableval}" in
1036 yes) enable_libstdcxx_debug=yes ;;
1037 no) enable_libstdcxx_debug=no ;;
1038 *) AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
1040 enable_libstdcxx_debug=GLIBCXX_ENABLE_DEBUG_DEFAULT)dnl
1041 AC_MSG_CHECKING([for additional debug build])
1042 AC_MSG_RESULT($enable_libstdcxx_debug)
1043 AM_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test "$enable_libstdcxx_debug" = yes)
1047 dnl Check for explicit debug flags.
1049 dnl GLIBCXX_ENABLE_DEBUG_FLAGS
1051 dnl --enable-libstdcxx-debug-flags='-O1'
1052 dnl is a general method for passing flags to be used when
1053 dnl building debug libraries with --enable-debug.
1055 dnl --disable-libstdcxx-debug-flags does nothing.
1056 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1057 dnl If "default flags" is an empty string (or "none"), the effect is
1058 dnl the same as --disable or --enable=no.
1059 AC_DEFUN(GLIBCXX_ENABLE_DEBUG_FLAGS, [dnl
1060 define([GLIBCXX_ENABLE_DEBUG_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
1061 AC_ARG_ENABLE(libstdcxx_debug_flags,
1062 changequote(<<, >>)dnl
1063 << --enable-libstdcxx-debug-flags=FLAGS pass compiler FLAGS when building
1065 [default=>>GLIBCXX_ENABLE_DEBUG_FLAGS_DEFAULT],
1066 changequote([, ])dnl
1067 [case "${enableval}" in
1069 -*) enable_libstdcxx_debug_flags="${enableval}" ;;
1070 *) AC_MSG_ERROR([Unknown argument to extra debugging flags]) ;;
1072 enable_libstdcxx_debug_flags=GLIBCXX_ENABLE_DEBUG_FLAGS_DEFAULT)dnl
1074 dnl Option parsed, now set things appropriately
1075 case x"$enable_libstdcxx_debug" in
1077 case "$enable_libstdcxx_debug_flags" in
1079 DEBUG_FLAGS="-g3 -O0";;
1081 DEBUG_FLAGS="${enableval}"
1088 AC_SUBST(DEBUG_FLAGS)
1090 AC_MSG_CHECKING([for debug build flags])
1091 AC_MSG_RESULT($DEBUG_FLAGS)
1096 dnl Check for "unusual" flags to pass to the compiler while building.
1098 dnl GLIBCXX_ENABLE_CXX_FLAGS
1099 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1100 dnl experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
1101 dnl Somehow this same set of flags must be passed when [re]building
1103 dnl --disable-cxx-flags passes nothing.
1104 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1105 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1106 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1107 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1108 dnl If "default flags" is an empty string (or "none"), the effect is
1109 dnl the same as --disable or --enable=no.
1110 AC_DEFUN(GLIBCXX_ENABLE_CXX_FLAGS, [dnl
1111 define([GLIBCXX_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
1112 AC_MSG_CHECKING([for extra compiler flags for building])
1113 AC_ARG_ENABLE(cxx_flags,
1114 changequote(<<, >>)dnl
1115 << --enable-cxx-flags=FLAGS pass compiler FLAGS when building library;
1116 [default=>>GLIBCXX_ENABLE_CXX_FLAGS_DEFAULT],
1117 changequote([, ])dnl
1118 [case "x$enable_cxx_flags" in
1120 AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
1122 enable_cxx_flags='' ;;
1124 enable_cxx_flags="$enableval" ;;
1126 enable_cxx_flags=GLIBCXX_ENABLE_CXX_FLAGS_DEFAULT)
1128 dnl Run through flags (either default or command-line) and set anything
1129 dnl extra (e.g., #defines) that must accompany particular g++ options.
1130 if test -n "$enable_cxx_flags"; then
1131 for f in $enable_cxx_flags; do
1135 *) # and we're trying to pass /what/ exactly?
1136 AC_MSG_ERROR([compiler flags start with a -]) ;;
1140 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1141 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1142 AC_SUBST(EXTRA_CXX_FLAGS)
1147 dnl Check for which locale library to use: gnu or generic.
1149 dnl GLIBCXX_ENABLE_CLOCALE
1150 dnl --enable-clocale=gnu sets config/locale/c_locale_gnu.cc and friends
1151 dnl --enable-clocale=generic sets config/locale/c_locale_generic.cc and friends
1153 dnl default is generic
1155 AC_DEFUN(GLIBCXX_ENABLE_CLOCALE, [
1156 AC_MSG_CHECKING([for clocale to use])
1157 AC_ARG_ENABLE(clocale,
1158 [ --enable-clocale enable model for target locale package.
1159 --enable-clocale=MODEL use MODEL target-speific locale package. [default=generic]
1161 if test x$enable_clocale = xno; then
1166 enable_clocale_flag=$enable_clocale
1168 dnl Probe for locale support if no specific model is specified.
1169 dnl Default to "generic"
1170 if test x$enable_clocale_flag = xno; then
1171 case x${target_os} in
1173 AC_EGREP_CPP([_GLIBCXX_ok], [
1174 #include <features.h>
1175 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1178 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1180 # Test for bugs early in glibc-2.2.x series
1181 if test x$enable_clocale_flag = xgnu; then
1183 #define _GNU_SOURCE 1
1186 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1187 extern __typeof(newlocale) __newlocale;
1188 extern __typeof(duplocale) __duplocale;
1189 extern __typeof(strcoll_l) __strcoll_l;
1193 const char __one[] = "Äuglein Augmen";
1194 const char __two[] = "Äuglein";
1199 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1200 loc_dup = __duplocale(loc);
1201 i = __strcoll_l(__one, __two, loc);
1202 j = __strcoll_l(__one, __two, loc_dup);
1206 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1207 [enable_clocale_flag=generic])
1210 # ... at some point put __strxfrm_l tests in as well.
1213 enable_clocale_flag=generic
1218 dnl Deal with gettext issues.
1220 [ --enable-nls use Native Language Support (default)],
1224 dnl Set configure bits for specified locale package
1225 case x${enable_clocale_flag} in
1227 AC_MSG_RESULT(generic)
1229 CLOCALE_H=config/locale/generic/c_locale.h
1230 CLOCALE_CC=config/locale/generic/c_locale.cc
1231 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1232 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1233 CCOLLATE_CC=config/locale/generic/collate_members.cc
1234 CCTYPE_CC=config/locale/generic/ctype_members.cc
1235 CMESSAGES_H=config/locale/generic/messages_members.h
1236 CMESSAGES_CC=config/locale/generic/messages_members.cc
1237 CMONEY_CC=config/locale/generic/monetary_members.cc
1238 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1239 CTIME_H=config/locale/generic/time_members.h
1240 CTIME_CC=config/locale/generic/time_members.cc
1241 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1246 # Declare intention to use gettext, and add support for specific
1248 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1251 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1252 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1253 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1256 # Export the build objects.
1257 for ling in $ALL_LINGUAS; do \
1258 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1259 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1261 AC_SUBST(glibcxx_MOFILES)
1262 AC_SUBST(glibcxx_POFILES)
1264 CLOCALE_H=config/locale/gnu/c_locale.h
1265 CLOCALE_CC=config/locale/gnu/c_locale.cc
1266 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1267 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1268 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1269 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1270 CMESSAGES_H=config/locale/gnu/messages_members.h
1271 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1272 CMONEY_CC=config/locale/gnu/monetary_members.cc
1273 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1274 CTIME_H=config/locale/gnu/time_members.h
1275 CTIME_CC=config/locale/gnu/time_members.cc
1276 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1279 AC_MSG_RESULT(IEEE 1003.1)
1281 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1282 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1283 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1284 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1285 CCOLLATE_CC=config/locale/generic/collate_members.cc
1286 CCTYPE_CC=config/locale/generic/ctype_members.cc
1287 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1288 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1289 CMONEY_CC=config/locale/generic/monetary_members.cc
1290 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1291 CTIME_H=config/locale/generic/time_members.h
1292 CTIME_CC=config/locale/generic/time_members.cc
1293 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1296 echo "$enable_clocale is an unknown locale package" 1>&2
1301 # This is where the testsuite looks for locale catalogs, using the
1302 # -DLOCALEDIR define during testsuite compilation.
1303 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1304 AC_SUBST(glibcxx_localedir)
1306 # A standalone libintl (e.g., GNU libintl) may be in use.
1307 if test $USE_NLS = yes; then
1308 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1309 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1311 if test $USE_NLS = yes; then
1312 AC_DEFINE(_GLIBCXX_USE_NLS)
1317 AC_SUBST(CCODECVT_H)
1318 AC_SUBST(CMESSAGES_H)
1319 AC_SUBST(CCODECVT_CC)
1320 AC_SUBST(CCOLLATE_CC)
1322 AC_SUBST(CMESSAGES_CC)
1324 AC_SUBST(CNUMERIC_CC)
1327 AC_SUBST(CLOCALE_CC)
1328 AC_SUBST(CLOCALE_INTERNAL_H)
1333 dnl Check for which I/O library to use: stdio, or something specific.
1335 dnl GLIBCXX_ENABLE_CSTDIO
1337 dnl default is stdio
1339 AC_DEFUN(GLIBCXX_ENABLE_CSTDIO, [
1340 AC_MSG_CHECKING([for cstdio to use])
1341 AC_ARG_ENABLE(cstdio,
1342 [ --enable-cstdio enable stdio for target io package.
1343 --enable-cstdio=LIB use LIB target-specific io package. [default=stdio]
1345 if test x$enable_cstdio = xno; then
1348 enable_cstdio=stdio)
1350 enable_cstdio_flag=$enable_cstdio
1352 dnl Check if a valid I/O package
1353 case x${enable_cstdio_flag} in
1354 xstdio | x | xno | xnone | xyes)
1356 CSTDIO_H=config/io/c_io_stdio.h
1357 BASIC_FILE_H=config/io/basic_file_stdio.h
1358 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1359 AC_MSG_RESULT(stdio)
1362 echo "$enable_cstdio is an unknown io package" 1>&2
1367 dnl Set directory for fpos.h
1368 FPOS_H=$fpos_include_dir
1372 AC_SUBST(BASIC_FILE_H)
1373 AC_SUBST(BASIC_FILE_CC)
1378 dnl Check to see if building and using a C++ precompiled header can be done.
1380 dnl GLIBCXX_ENABLE_PCH
1382 dnl --enable-libstdcxx-pch=yes
1383 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1384 dnl may work, after some light-hearted attempts to puzzle out compiler
1385 dnl support, flip bits on in include/Makefile.am
1387 dnl --disable-libstdcxx-pch
1388 dnl turns off attempts to use or build stdc++.h.gch.
1390 AC_DEFUN(GLIBCXX_ENABLE_PCH, [dnl
1391 define([GLIBCXX_ENABLE_PCH_DEFAULT], ifelse($1,,, $1))dnl
1392 AC_ARG_ENABLE(libstdcxx_pch,
1393 changequote(<<, >>)dnl
1394 << --enable-libstdcxx-pch build pre-compiled libstdc++ includes [default=>>GLIBCXX_ENABLE_PCH_DEFAULT],
1395 changequote([, ])dnl
1396 [case "${enableval}" in
1397 yes) enable_libstdcxx_pch=yes ;;
1398 no) enable_libstdcxx_pch=no ;;
1399 *) AC_MSG_ERROR([Unknown argument to enable/disable PCH]) ;;
1401 enable_libstdcxx_pch=GLIBCXX_ENABLE_PCH_DEFAULT)dnl
1403 if test x$enable_libstdcxx_pch = xyes; then
1404 ac_test_CXXFLAGS="${CXXFLAGS+set}"
1405 ac_save_CXXFLAGS="$CXXFLAGS"
1406 CXXFLAGS='-Werror -Winvalid-pch -Wno-deprecated -x c++-header'
1408 AC_MSG_CHECKING([for compiler that seems to compile .gch files])
1409 if test x${pch_comp+set} != xset; then
1410 AC_CACHE_VAL(pch_comp, [
1413 AC_TRY_COMPILE([#include <math.h>], ,
1414 [pch_comp=yes], [pch_comp=no])
1418 AC_MSG_RESULT([$pch_comp])
1420 CXXFLAGS="$ac_save_CXXFLAGS"
1423 if test x"$enable_libstdcxx_pch" = xyes && test x"$pch_comp" = xno; then
1427 AC_MSG_CHECKING([for enabled PCH])
1428 AC_MSG_RESULT([$enable_libstdcxx_pch])
1430 AM_CONDITIONAL(GLIBCXX_BUILD_PCH, test "$enable_libstdcxx_pch" = yes)
1431 if test "$enable_libstdcxx_pch" = yes; then
1432 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1436 AC_SUBST(glibcxx_PCHFLAGS)
1440 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1441 dnl We must stage the required headers so that they will be installed
1442 dnl with the library (unlike libgcc, the STL implementation is provided
1443 dnl solely within headers). Since we must not inject random user-space
1444 dnl macro names into user-provided C++ code, we first stage into <file>-in
1445 dnl and process to <file> with an output command. The reason for a two-
1446 dnl stage process here is to correctly handle $srcdir!=$objdir without
1447 dnl having to write complex code (the sed commands to clean the macro
1448 dnl namespace are complex and fragile enough as it is). We must also
1449 dnl add a relative path so that -I- is supported properly.
1451 AC_DEFUN(GLIBCXX_ENABLE_THREADS, [
1452 AC_MSG_CHECKING([for thread model used by GCC])
1453 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
1454 AC_MSG_RESULT([$target_thread_file])
1456 if test $target_thread_file != single; then
1457 AC_DEFINE(HAVE_GTHR_DEFAULT)
1458 AC_DEFINE(_GLIBCXX_SUPPORTS_WEAK, __GXX_WEAK__)
1461 glibcxx_thread_h=gthr-$target_thread_file.h
1462 AC_SUBST(glibcxx_thread_h)
1467 dnl Check for exception handling support. If an explicit enable/disable
1468 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1469 dnl target may or may not support call frame exceptions.
1471 dnl GLIBCXX_ENABLE_SJLJ_EXCEPTIONS
1472 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1473 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1475 dnl Define _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it.
1477 AC_DEFUN(GLIBCXX_ENABLE_SJLJ_EXCEPTIONS, [
1478 AC_MSG_CHECKING([for exception model to use])
1481 AC_ARG_ENABLE(sjlj-exceptions,
1482 [ --enable-sjlj-exceptions force use of builtin_setjmp for exceptions],
1484 [dnl Botheration. Now we've got to detect the exception model.
1485 dnl Link tests against libgcc.a are problematic since -- at least
1486 dnl as of this writing -- we've not been given proper -L bits for
1487 dnl single-tree newlib and libgloss.
1489 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
1490 dnl conftest files before we got a change to grep them first.
1491 cat > conftest.$ac_ext << EOF
1492 [#]line __oline__ "configure"
1501 old_CXXFLAGS="$CXXFLAGS"
1503 if AC_TRY_EVAL(ac_compile); then
1504 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1505 enable_sjlj_exceptions=yes
1506 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1507 enable_sjlj_exceptions=no
1510 CXXFLAGS="$old_CXXFLAGS"
1512 if test x$enable_sjlj_exceptions = xyes; then
1513 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1514 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1515 ac_exception_model_name=sjlj
1516 elif test x$enable_sjlj_exceptions = xno; then
1517 ac_exception_model_name="call frame"
1519 AC_MSG_ERROR([unable to detect exception model])
1522 AC_MSG_RESULT($ac_exception_model_name)
1527 dnl Check for libunwind exception handling support. If enabled then
1528 dnl we assume that the _Unwind_* functions that make up the Unwind ABI
1529 dnl (_Unwind_RaiseException, _Unwind_Resume, etc.) are defined by
1530 dnl libunwind instead of libgcc and that libstdc++ has a dependency
1531 dnl on libunwind as well as libgcc.
1533 dnl GLIBCXX_ENABLE_LIBUNWIND_EXCEPTIONS
1534 dnl --enable-libunwind-exceptions forces the use of libunwind.
1535 dnl --disable-libunwind-exceptions assumes there is no libunwind.
1537 dnl Define _GLIBCXX_LIBUNWIND_EXCEPTIONS if requested.
1539 AC_DEFUN(GLIBCXX_ENABLE_LIBUNWIND_EXCEPTIONS, [
1540 AC_MSG_CHECKING([for use of libunwind])
1541 AC_ARG_ENABLE(libunwind-exceptions,
1542 [ --enable-libunwind-exceptions force use of libunwind for exceptions],
1543 use_libunwind_exceptions=$enableval,
1544 use_libunwind_exceptions=no)
1545 AC_MSG_RESULT($use_libunwind_exceptions)
1546 dnl Option parsed, now set things appropriately
1547 if test x"$use_libunwind_exceptions" = xyes; then
1548 LIBUNWIND_FLAG="-lunwind"
1552 AC_SUBST(LIBUNWIND_FLAG)
1556 dnl Check for ISO/IEC 9899:1999 "C99" support.
1558 dnl GLIBCXX_ENABLE_C99
1559 dnl --enable-c99 defines _GLIBCXX_USE_C99
1560 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
1561 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
1562 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1563 dnl defaults to `no'.
1564 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
1566 dnl GLIBCXX_ENABLE_C99
1567 AC_DEFUN(GLIBCXX_ENABLE_C99, [dnl
1568 define([GLIBCXX_ENABLE_C99_DEFAULT], ifelse($1, yes, yes, no))dnl
1571 changequote(<<, >>)dnl
1572 <<--enable-c99 turns on 'ISO/IEC 9899:1999 support' [default=>>GLIBCXX_ENABLE_C99_DEFAULT],
1573 changequote([, ])dnl
1574 [case "$enableval" in
1575 yes) enable_c99=yes ;;
1576 no) enable_c99=no ;;
1577 *) AC_MSG_ERROR([Unknown argument to enable/disable C99]) ;;
1579 enable_c99=GLIBCXX_ENABLE_C99_DEFAULT)dnl
1584 # Check for the existence of <math.h> functions used if C99 is enabled.
1586 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
1587 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
1588 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
1589 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
1590 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
1591 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
1592 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
1593 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
1594 AC_TRY_COMPILE([#include <math.h>],
1595 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
1596 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
1597 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
1598 AC_TRY_COMPILE([#include <math.h>],
1599 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
1600 AC_TRY_COMPILE([#include <math.h>],
1601 [isunordered(0.0,0.0);],, [ac_c99_math=no])
1602 AC_MSG_RESULT($ac_c99_math)
1604 # Check for the existence in <stdio.h> of vscanf, et. al.
1606 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1607 AC_TRY_COMPILE([#include <stdio.h>],
1608 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
1609 AC_TRY_COMPILE([#include <stdio.h>
1611 void foo(char* fmt, ...)
1612 {va_list args; va_start(args, fmt);
1613 vfscanf(stderr, "%i", args);}],
1614 [],, [ac_c99_stdio=no])
1615 AC_TRY_COMPILE([#include <stdio.h>
1617 void foo(char* fmt, ...)
1618 {va_list args; va_start(args, fmt);
1619 vscanf("%i", args);}],
1620 [],, [ac_c99_stdio=no])
1621 AC_TRY_COMPILE([#include <stdio.h>
1623 void foo(char* fmt, ...)
1624 {va_list args; va_start(args, fmt);
1625 vsnprintf(fmt, 0, "%i", args);}],
1626 [],, [ac_c99_stdio=no])
1627 AC_TRY_COMPILE([#include <stdio.h>
1629 void foo(char* fmt, ...)
1630 {va_list args; va_start(args, fmt);
1631 vsscanf(fmt, "%i", args);}],
1632 [],, [ac_c99_stdio=no])
1633 AC_MSG_RESULT($ac_c99_stdio)
1635 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1637 AC_MSG_CHECKING([for lldiv_t declaration])
1638 AC_CACHE_VAL(ac_c99_lldiv_t, [
1639 AC_TRY_COMPILE([#include <stdlib.h>],
1641 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
1643 AC_MSG_RESULT($ac_c99_lldiv_t)
1645 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1646 AC_TRY_COMPILE([#include <stdlib.h>],
1647 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
1648 AC_TRY_COMPILE([#include <stdlib.h>],
1649 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
1650 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
1651 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
1652 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
1653 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
1654 if test x"$ac_c99_lldiv_t" = x"no"; then
1657 AC_MSG_RESULT($ac_c99_stdlib)
1659 # Check for the existence of <wchar.h> functions used if C99 is enabled.
1660 # XXX the wchar.h checks should be rolled into the general C99 bits.
1662 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
1663 AC_TRY_COMPILE([#include <wchar.h>],
1664 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
1665 AC_TRY_COMPILE([#include <wchar.h>],
1666 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
1667 AC_TRY_COMPILE([#include <wchar.h>],
1668 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
1669 AC_MSG_RESULT($ac_c99_wchar)
1671 AC_MSG_CHECKING([for enabled ISO C99 support])
1672 if test x"$ac_c99_math" = x"no" ||
1673 test x"$ac_c99_stdio" = x"no" ||
1674 test x"$ac_c99_stdlib" = x"no" ||
1675 test x"$ac_c99_wchar" = x"no"; then
1678 AC_MSG_RESULT($enable_c99)
1680 # Option parsed, now set things appropriately
1681 if test x"$enable_c99" = x"yes"; then
1682 AC_DEFINE(_GLIBCXX_USE_C99)
1690 dnl Check for template specializations for the 'long long' type extension.
1691 dnl The result determines only whether 'long long' I/O is enabled; things
1692 dnl like numeric_limits<> specializations are always available.
1694 dnl GLIBCXX_ENABLE_LONG_LONG
1695 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1696 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1697 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1698 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1699 dnl defaults to `no'.
1700 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1702 dnl GLIBCXX_ENABLE_LONG_LONG
1703 AC_DEFUN(GLIBCXX_ENABLE_LONG_LONG, [dnl
1704 define([GLIBCXX_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1706 AC_ARG_ENABLE(long-long,
1707 changequote(<<, >>)dnl
1708 <<--enable-long-long turns on 'long long' [default=>>GLIBCXX_ENABLE_LONG_LONG_DEFAULT],
1709 changequote([, ])dnl
1710 [case "$enableval" in
1711 yes) enable_long_long=yes ;;
1712 no) enable_long_long=no ;;
1713 *) AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1715 enable_long_long=GLIBCXX_ENABLE_LONG_LONG_DEFAULT)dnl
1720 AC_MSG_CHECKING([for enabled long long I/O support])
1721 # iostreams require strtoll, strtoull to compile
1722 AC_TRY_COMPILE([#include <stdlib.h>],
1723 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1724 AC_TRY_COMPILE([#include <stdlib.h>],
1725 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1727 # Option parsed, now set things appropriately
1728 if test x"$enable_long_long" = xyes; then
1729 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1731 AC_MSG_RESULT($enable_long_long)
1738 dnl Check for what type of C headers to use.
1740 dnl GLIBCXX_ENABLE_CHEADERS
1741 dnl --enable-cheaders= [does stuff].
1742 dnl --disable-cheaders [does not do anything, really].
1743 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1744 dnl Where DEFAULT is either `c' or `c_std'.
1745 dnl If ommitted, it defaults to `c_std'.
1746 AC_DEFUN(GLIBCXX_ENABLE_CHEADERS, [dnl
1747 define([GLIBCXX_ENABLE_CHEADERS_DEFAULT], ifelse($1, c_std, c_std, c_std))dnl
1748 AC_MSG_CHECKING([for c header strategy to use])
1749 AC_ARG_ENABLE(cheaders,
1750 changequote(<<, >>)dnl
1751 << --enable-cheaders=MODEL construct "C" header files for g++ [default=>>GLIBCXX_ENABLE_CHEADERS_DEFAULT],
1753 [case "$enableval" in
1758 enable_cheaders=c_std
1760 *) AC_MSG_ERROR([Unknown argument to enable/disable "C" headers])
1763 enable_cheaders=GLIBCXX_ENABLE_CHEADERS_DEFAULT)
1764 AC_MSG_RESULT($enable_cheaders)
1766 dnl Option parsed, now set things appropriately
1767 case "$enable_cheaders" in
1769 C_INCLUDE_DIR='${glibcxx_srcdir}/include/c_std'
1772 C_INCLUDE_DIR='${glibcxx_srcdir}/include/c'
1776 AC_SUBST(C_INCLUDE_DIR)
1777 AM_CONDITIONAL(GLIBCXX_C_HEADERS_C, test "$enable_cheaders" = c)
1778 AM_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test "$enable_cheaders" = c_std)
1779 AM_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test "$c_compatibility" = yes)
1784 dnl Check for wide character support. Has the same effect as the option
1785 dnl in gcc's configure, but in a form that autoconf can mess with.
1787 dnl GLIBCXX_ENABLE_C_MBCHAR
1788 dnl --enable-c-mbchar requests all the wchar_t stuff.
1789 dnl --disable-c-mbchar doesn't.
1790 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1791 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1792 dnl defaults to `no'.
1793 AC_DEFUN(GLIBCXX_ENABLE_C_MBCHAR, [dnl
1794 define([GLIBCXX_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1795 AC_ARG_ENABLE(c-mbchar,
1796 changequote(<<, >>)dnl
1797 << --enable-c-mbchar enable multibyte (wide) characters [default=>>GLIBCXX_ENABLE_C_MBCHAR_DEFAULT],
1798 changequote([, ])dnl
1799 [case "$enableval" in
1800 yes) enable_c_mbchar=yes ;;
1801 no) enable_c_mbchar=no ;;
1802 *) AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1804 enable_c_mbchar=GLIBCXX_ENABLE_C_MBCHAR_DEFAULT)dnl
1805 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1810 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1812 dnl TOPLEVEL_INCLUDES
1813 dnl LIBMATH_INCLUDES
1814 dnl LIBSUPCXX_INCLUDES
1816 dnl GLIBCXX_EXPORT_INCLUDES
1817 AC_DEFUN(GLIBCXX_EXPORT_INCLUDES, [
1818 # Root level of the build directory include sources.
1819 GLIBCXX_INCLUDES="-I${glibcxx_builddir}/include/${target_alias} -I${glibcxx_builddir}/include"
1821 # Passed down for canadian crosses.
1822 if test x"$CANADIAN" = xyes; then
1823 TOPLEVEL_INCLUDES='-I$(includedir)'
1826 LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1828 LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1830 # Now, export this to all the little Makefiles....
1831 AC_SUBST(GLIBCXX_INCLUDES)
1832 AC_SUBST(TOPLEVEL_INCLUDES)
1833 AC_SUBST(LIBMATH_INCLUDES)
1834 AC_SUBST(LIBSUPCXX_INCLUDES)
1839 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1841 AC_DEFUN(GLIBCXX_EXPORT_FLAGS, [
1842 # Optimization flags that are probably a good idea for thrill-seekers. Just
1843 # uncomment the lines below and make, everything else is ready to go...
1844 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1846 AC_SUBST(OPTIMIZE_CXXFLAGS)
1848 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings'
1849 AC_SUBST(WARN_FLAGS)
1853 dnl GLIBCXX_EXPORT_INSTALL_INFO
1854 dnl calculates gxx_install_dir
1855 dnl exports glibcxx_toolexecdir
1856 dnl exports glibcxx_toolexeclibdir
1857 dnl exports glibcxx_prefixdir
1859 dnl Assumes cross_compiling bits already done, and with_cross_host in
1862 dnl GLIBCXX_EXPORT_INSTALL_INFO
1863 AC_DEFUN(GLIBCXX_EXPORT_INSTALL_INFO, [
1864 # Assumes glibcxx_builddir, glibcxx_srcdir are alreay set up and
1865 # exported correctly in GLIBCXX_CONFIGURE.
1866 glibcxx_toolexecdir=no
1867 glibcxx_toolexeclibdir=no
1868 glibcxx_prefixdir=${prefix}
1870 # Process the option --with-gxx-include-dir=<path to include-files directory>
1871 AC_MSG_CHECKING([for --with-gxx-include-dir])
1872 AC_ARG_WITH(gxx-include-dir,
1873 [ --with-gxx-include-dir the installation directory for include files],
1874 [case "${withval}" in
1876 AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
1883 gxx_include_dir=${withval}
1885 esac], [gxx_include_dir=no])
1886 AC_MSG_RESULT($gxx_include_dir)
1888 # Process the option "--enable-version-specific-runtime-libs"
1889 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
1890 AC_ARG_ENABLE(version-specific-runtime-libs,
1891 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
1892 [case "$enableval" in
1893 yes) version_specific_libs=yes ;;
1894 no) version_specific_libs=no ;;
1895 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
1897 version_specific_libs=no)dnl
1898 # Option set, now we can test it.
1899 AC_MSG_RESULT($version_specific_libs)
1901 # Default case for install directory for include files.
1902 if test $version_specific_libs = no && test $gxx_include_dir = no; then
1903 gxx_include_dir='$(prefix)'/include/c++/${gcc_version}
1906 # Version-specific runtime libs processing.
1907 if test $version_specific_libs = yes; then
1908 # Need the gcc compiler version to know where to install libraries
1909 # and header files if --enable-version-specific-runtime-libs option
1911 if test x"$gxx_include_dir" = x"no"; then
1912 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/c++
1914 glibcxx_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1915 glibcxx_toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)'
1918 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
1919 # Install a library built with a cross compiler in tooldir, not libdir.
1920 if test x"$glibcxx_toolexecdir" = x"no"; then
1921 if test -n "$with_cross_host" &&
1922 test x"$with_cross_host" != x"no"; then
1923 glibcxx_toolexecdir='$(exec_prefix)/$(target_alias)'
1924 glibcxx_toolexeclibdir='$(toolexecdir)/lib'
1926 glibcxx_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1927 glibcxx_toolexeclibdir='$(libdir)'
1929 multi_os_directory=`$CC -print-multi-os-directory`
1930 case $multi_os_directory in
1931 .) ;; # Avoid trailing /.
1932 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
1936 AC_MSG_CHECKING([for install location])
1937 AC_MSG_RESULT($gxx_include_dir)
1939 AC_SUBST(glibcxx_prefixdir)
1940 AC_SUBST(gxx_include_dir)
1941 AC_SUBST(glibcxx_toolexecdir)
1942 AC_SUBST(glibcxx_toolexeclibdir)
1946 # Check for functions in math library.
1947 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1949 # This file can be copied and used freely without restrictions. It can
1950 # be used in projects which are not available under the GNU Public License
1951 # but which still want to provide support for the GNU gettext functionality.
1952 # Please note that the actual code is *not* freely available.
1956 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1957 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1958 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])])
1961 dnl This macro searches for a GNU version of make. If a match is found, the
1962 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1963 dnl set to "#". This is useful for including a special features in a Makefile,
1964 dnl which cannot be handled by other versions of make. The variable
1965 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1966 dnl the empty string otherwise.
1968 dnl Here is an example of its use:
1970 dnl Makefile.in might contain:
1972 dnl # A failsafe way of putting a dependency rule into a makefile
1974 dnl $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1976 dnl @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1977 dnl @ifGNUmake@ include $(DEPEND)
1978 dnl @ifGNUmake@ endif
1980 dnl Then configure.in would normally contain:
1982 dnl CHECK_GNU_MAKE()
1983 dnl AC_OUTPUT(Makefile)
1985 dnl Then perhaps to cause gnu make to override any other make, we could do
1986 dnl something like this (note that GNU make always looks for GNUmakefile first):
1988 dnl if ! test x$_cv_gnu_make_command = x ; then
1989 dnl mv Makefile GNUmakefile
1990 dnl echo .DEFAULT: > Makefile ;
1991 dnl echo \ $_cv_gnu_make_command \$@ >> Makefile;
1994 dnl Then, if any (well almost any) other make is called, and GNU make also
1995 dnl exists, then the other make wraps the GNU make.
1997 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1998 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
2000 dnl #### Changes for libstdc++-v3: reformatting and linewrapping; prepending
2001 dnl #### GLIBCXX_ to the macro name; adding the :-make fallback in the
2002 dnl #### conditional's subshell (" --version" is not a command), using a
2003 dnl #### different option to grep(1).
2005 dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not
2006 dnl #### ${MAKE:-make}).
2009 GLIBCXX_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
2010 _cv_gnu_make_command='' ;
2011 dnl Search all the common names for GNU make
2012 for a in "${MAKE-make}" make gmake gnumake ; do
2013 if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
2015 _cv_gnu_make_command=$a ;
2020 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
2021 dnl string, '#' otherwise
2022 if test "x$_cv_gnu_make_command" != "x" ; then
2031 dnl Check for headers for, and arguments to, the setrlimit() function.
2032 dnl Used only in testsuite_hooks.h.
2033 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT_ancilliary, [
2034 AC_TRY_COMPILE([#include <unistd.h>
2035 #include <sys/time.h>
2036 #include <sys/resource.h>
2037 ], [ int f = RLIMIT_$1 ; ],
2038 [glibcxx_mresult=1], [glibcxx_mresult=0])
2039 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcxx_mresult,
2040 [Only used in build directory testsuite_hooks.h.])
2042 AC_DEFUN(GLIBCXX_CHECK_SETRLIMIT, [
2043 setrlimit_have_headers=yes
2044 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
2046 setrlimit_have_headers=no)
2047 # If don't have the headers, then we can't run the tests now, and we
2048 # won't be seeing any of these during testsuite compilation.
2049 if test $setrlimit_have_headers = yes; then
2050 # Can't do these in a loop, else the resulting syntax is wrong.
2051 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
2052 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
2053 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
2054 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
2056 # Check for rlimit, setrlimit.
2057 AC_CACHE_VAL(ac_setrlimit, [
2058 AC_TRY_COMPILE([#include <unistd.h>
2059 #include <sys/time.h>
2060 #include <sys/resource.h>
2062 [ struct rlimit r; setrlimit(0, &r);],
2063 [ac_setrlimit=yes], [ac_setrlimit=no])
2067 AC_MSG_CHECKING([for testsuite memory limit support])
2068 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
2070 AC_DEFINE(_GLIBCXX_MEM_LIMITS)
2074 AC_MSG_RESULT($ac_mem_limits)
2079 dnl Does any necessary configuration of the testsuite directory. Generates
2080 dnl the testsuite_hooks.h header.
2082 dnl GLIBCXX_CONFIGURE_TESTSUITE [no args]
2083 AC_DEFUN(GLIBCXX_CONFIGURE_TESTSUITE, [
2085 if test x"$GLIBCXX_IS_CROSS_COMPILING" = xfalse; then
2086 # Do checks for memory limit functions.
2087 GLIBCXX_CHECK_SETRLIMIT
2089 # Look for setenv, so that extended locale tests can be performed.
2090 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
2093 # Export file names for ABI checking.
2094 baseline_dir="${glibcxx_srcdir}/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
2095 AC_SUBST(baseline_dir)
2097 # Determine if checking the ABI is desirable.
2098 if test x$enable_symvers = xno; then
2103 enable_abi_check=no ;;
2105 enable_abi_check=yes ;;
2109 AM_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test "$enable_wchar_t" = yes)
2110 AM_CONDITIONAL(GLIBCXX_TEST_ABI, test "$enable_abi_check" = yes)
2114 sinclude(../libtool.m4)
2115 dnl The lines below arrange for aclocal not to bring an installed
2116 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
2117 dnl add a definition of LIBTOOL to Makefile.in.
2118 ifelse(,,,[AC_SUBST(LIBTOOL)
2119 AC_DEFUN([AM_PROG_LIBTOOL])
2120 AC_DEFUN([AC_LIBTOOL_DLOPEN])
2121 AC_DEFUN([AC_PROG_LD])
2125 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
2128 AC_DEFUN(GLIBCXX_CHECK_S_ISREG_OR_S_IFREG, [
2129 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
2130 AC_TRY_LINK([#include <sys/stat.h>],
2131 [struct stat buffer; fstat(0, &buffer); S_ISREG(buffer.st_mode); ],
2132 [glibcxx_cv_S_ISREG=yes],
2133 [glibcxx_cv_S_ISREG=no])
2135 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
2136 AC_TRY_LINK([#include <sys/stat.h>],
2137 [struct stat buffer; fstat(0, &buffer); S_IFREG & buffer.st_mode; ],
2138 [glibcxx_cv_S_IFREG=yes],
2139 [glibcxx_cv_S_IFREG=no])
2141 if test x$glibcxx_cv_S_ISREG = xyes; then
2142 AC_DEFINE(HAVE_S_ISREG)
2143 elif test x$glibcxx_cv_S_IFREG = xyes; then
2144 AC_DEFINE(HAVE_S_IFREG)
2149 dnl Check whether poll is available in <poll.h>.
2152 AC_DEFUN(GLIBCXX_CHECK_POLL, [
2153 AC_CACHE_VAL(glibcxx_cv_POLL, [
2154 AC_TRY_COMPILE([#include <poll.h>],
2155 [struct pollfd pfd[1]; pfd[0].events = POLLIN; poll(pfd, 1, 0); ],
2156 [glibcxx_cv_POLL=yes],
2157 [glibcxx_cv_POLL=no])
2159 if test x$glibcxx_cv_POLL = xyes; then
2160 AC_DEFINE(HAVE_POLL)
2164 # Check whether LC_MESSAGES is available in <locale.h>.
2165 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2167 # This file file be copied and used freely without restrictions. It can
2168 # be used in projects which are not available under the GNU Public License
2169 # but which still want to provide support for the GNU gettext functionality.
2170 # Please note that the actual code is *not* freely available.
2174 AC_DEFUN(AC_LC_MESSAGES, [
2175 AC_CHECK_HEADER(locale.h, [
2176 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2177 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2178 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2179 if test $ac_cv_val_LC_MESSAGES = yes; then
2180 AC_DEFINE(HAVE_LC_MESSAGES)
2187 dnl Check for whether the Boost-derived checks should be turned on.
2189 dnl GLIBCXX_ENABLE_CONCEPT_CHECKS
2190 dnl --enable-concept-checks turns them on.
2191 dnl --disable-concept-checks leaves them off.
2192 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2193 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
2194 dnl defaults to `no'.
2195 AC_DEFUN(GLIBCXX_ENABLE_CONCEPT_CHECKS, [dnl
2196 define([GLIBCXX_ENABLE_CONCEPT_CHECKS_DEFAULT], ifelse($1, yes, yes, no))dnl
2197 AC_ARG_ENABLE(concept-checks,
2198 changequote(<<, >>)dnl
2199 << --enable-concept-checks use Boost-derived template checks [default=>>GLIBCXX_ENABLE_CONCEPT_CHECKS_DEFAULT],
2200 changequote([, ])dnl
2201 [case "$enableval" in
2202 yes) enable_concept_checks=yes ;;
2203 no) enable_concept_checks=no ;;
2204 *) AC_MSG_ERROR([Unknown argument to enable/disable concept checks]) ;;
2206 enable_concept_checks=GLIBCXX_ENABLE_CONCEPT_CHECKS_DEFAULT)dnl
2207 dnl Option parsed, now set things appropriately
2208 if test x"$enable_concept_checks" = xyes; then
2209 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
2215 dnl Add version tags to symbols in shared library (or not), additionally
2216 dnl marking other symbols as private/local (or not).
2218 dnl GLIBCXX_ENABLE_SYMVERS
2219 dnl --enable-symvers=style adds a version script to the linker call when
2220 dnl creating the shared library. The choice of version script is
2221 dnl controlled by 'style'.
2222 dnl --disable-symvers does not.
2223 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2224 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
2225 dnl defaults to `no'. Passing `yes' tries to choose a default style
2226 dnl based on linker characteristics. Passing 'no' disables versioning.
2227 AC_DEFUN(GLIBCXX_ENABLE_SYMVERS, [dnl
2228 define([GLIBCXX_ENABLE_SYMVERS_DEFAULT], ifelse($1, yes, yes, no))dnl
2229 AC_ARG_ENABLE(symvers,
2230 changequote(<<, >>)dnl
2231 << --enable-symvers=style enables symbol versioning of the shared library [default=>>GLIBCXX_ENABLE_SYMVERS_DEFAULT],
2232 changequote([, ])dnl
2233 [case "$enableval" in
2234 yes) enable_symvers=yes ;;
2235 no) enable_symvers=no ;;
2236 # other names here, just as sanity checks
2237 #gnu|sun|etcetera) enable_symvers=$enableval ;;
2238 gnu) enable_symvers=$enableval ;;
2239 *) AC_MSG_ERROR([Unknown argument to enable/disable symvers]) ;;
2241 enable_symvers=GLIBCXX_ENABLE_SYMVERS_DEFAULT)dnl
2243 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2244 # don't know enough about $LD to do tricks...
2245 if test x$enable_shared = xno ||
2247 test x$glibcxx_gnu_ld_version = x; then
2251 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2252 if test $enable_symvers != no; then
2253 AC_MSG_CHECKING([for shared libgcc])
2254 ac_save_CFLAGS="$CFLAGS"
2256 AC_TRY_LINK(, [return 0], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2257 CFLAGS="$ac_save_CFLAGS"
2258 AC_MSG_RESULT($glibcxx_shared_libgcc)
2261 # For GNU ld, we need at least this version. It's 2.12 in the same format
2262 # as the tested-for version. See GLIBCXX_CHECK_LINKER_FEATURES for more.
2263 glibcxx_min_gnu_ld_version=21200
2265 # Check to see if unspecified "yes" value can win, given results
2267 if test $enable_symvers = yes ; then
2268 if test $with_gnu_ld = yes &&
2269 test $glibcxx_shared_libgcc = yes ;
2271 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
2274 ac_test_CFLAGS="${CFLAGS+set}"
2275 ac_save_CFLAGS="$CFLAGS"
2276 CFLAGS='-shared -Wl,--version-script,conftest.map'
2279 echo 'FOO { global: f[a-z]o; local: *; };' > conftest.map
2281 AC_TRY_LINK([int foo;],, enable_symvers=gnu)
2282 if test "$ac_test_CFLAGS" = set; then
2283 CFLAGS="$ac_save_CFLAGS"
2285 # this is the suspicious part
2296 dnl Everything parsed; figure out what file to use.
2297 case $enable_symvers in
2299 SYMVER_MAP=config/linker-map.dummy
2302 SYMVER_MAP=config/linker-map.gnu
2303 AC_DEFINE(_GLIBCXX_SYMVER)
2307 AC_SUBST(SYMVER_MAP)
2308 AM_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
2309 AC_MSG_CHECKING([versioning on shared library symbols])
2310 AC_MSG_RESULT($enable_symvers)