2 dnl Initialize basic configure bits, set toplevel_srcdir for Makefiles.
4 dnl GLIBCPP_TOPREL_CONFIGURE
5 AC_DEFUN(GLIBCPP_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}/$toprel
36 AC_SUBST(toplevel_srcdir)
40 dnl Initialize the rest of the library configury.
43 AC_DEFUN(GLIBCPP_CONFIGURE, [
44 # Export build and source directories.
45 # These need to be absolute paths, yet at the same time need to
46 # canonicalize only relative paths, because then amd will not unmount
47 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
48 glibcpp_builddir=`${PWDCMD-pwd}`
50 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
51 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
53 AC_SUBST(glibcpp_builddir)
54 AC_SUBST(glibcpp_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 glibcpp_basedir=$srcdir/$toprel/$1/libstdc++-v3
77 AC_SUBST(glibcpp_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 glibcpp_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(glibcpp_CXX, $CCC c++ g++ gcc CC cxx cc++, gcc)
140 AC_SUBST(glibcpp_CXX)
142 test -z "$glibcpp_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=`$glibcpp_CXX -dumpversion`
173 AC_MSG_RESULT($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 $(EXEEXT). Moreover, the test for EXEEXT normally
188 # fails, because we are probably configuring with a cross compiler
189 # which can't create executables. So we include AC_EXEEXT to keep
190 # automake happy, but we don't execute it, since we don't care about
193 # autoconf 2.50 runs AC_EXEEXT by default, and the macro expands
194 # to nothing, so nothing would remain between `then' and `fi' if it
195 # were not for the `:' below.
200 case [$]{glibcpp_basedir} in
201 /* | [A-Za-z]:[\\/]*) libgcj_flagbasedir=[$]{glibcpp_basedir} ;;
202 *) glibcpp_flagbasedir='[$](top_builddir)/'[$]{glibcpp_basedir} ;;
205 # Find platform-specific directories containing configuration info. In
206 # addition to possibly modifying the same flags, it also sets up symlinks.
212 dnl Check to see if g++ can compile this library, and if so, if any version-
213 dnl specific precautions need to be taken.
215 dnl GLIBCPP_CHECK_COMPILER_VERSION
216 AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [
217 if test ! -f stamp-sanity-compiler; then
218 AC_MSG_CHECKING([for g++ that will successfully compile libstdc++-v3])
225 ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to GCC 3.0 or above]))
227 AC_MSG_RESULT($gpp_satisfactory)
228 touch stamp-sanity-compiler
234 dnl Tests for newer compiler features, or features that are present in newer
235 dnl compiler versions but not older compiler versions still in use, should
238 dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the
239 dnl new inlining code or the new system_header pragma will die on -Werror.
240 dnl Leave it out by default and use maint-mode to use it.
242 dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if
243 dnl compiler supports it and the user has not requested debug mode.
245 dnl GLIBCPP_CHECK_COMPILER_FEATURES
246 AC_DEFUN(GLIBCPP_CHECK_COMPILER_FEATURES, [
247 # All these tests are for C++; save the language and the compiler flags.
248 # The CXXFLAGS thing is suspicious, but based on similar bits previously
249 # found in GLIBCPP_CONFIGURE.
252 ac_test_CXXFLAGS="${CXXFLAGS+set}"
253 ac_save_CXXFLAGS="$CXXFLAGS"
255 # Check for maintainer-mode bits.
256 if test x"$USE_MAINTAINER_MODE" = xno; then
262 # Check for -ffunction-sections -fdata-sections
263 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
264 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
265 AC_TRY_COMPILE(, [int foo;
266 ], [ac_fdsections=yes], [ac_fdsections=no])
267 if test "$ac_test_CXXFLAGS" = set; then
268 CXXFLAGS="$ac_save_CXXFLAGS"
270 # this is the suspicious part
273 if test x"$ac_fdsections" = x"yes"; then
274 SECTION_FLAGS='-ffunction-sections -fdata-sections'
276 AC_MSG_RESULT($ac_fdsections)
280 AC_SUBST(SECTION_FLAGS)
285 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
286 dnl the native linker is in use, all variables will be defined to something
287 dnl safe (like an empty string).
289 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
290 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
291 dnl Define LD, with_gnu_ld, and (possibly) glibcpp_gnu_ld_version as
292 dnl side-effects of testing.
294 dnl GLIBCPP_CHECK_LINKER_FEATURES
295 AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [
296 # If we're not using GNU ld, then there's no point in even trying these
297 # tests. Check for that first. We should have already tested for gld
298 # by now (in libtool), but require it now just to be safe...
299 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
300 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
301 AC_REQUIRE([AC_PROG_LD])
303 # The name set by libtool depends on the version of libtool. Shame on us
304 # for depending on an impl detail, but c'est la vie. Older versions used
305 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
306 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
307 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
308 # set (hence we're using an older libtool), then set it.
309 if test x${with_gnu_ld+set} != xset; then
310 if test x${ac_cv_prog_gnu_ld+set} != xset; then
311 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
314 with_gnu_ld=$ac_cv_prog_gnu_ld
318 # Start by getting the version number. I think the libtool test already
319 # does some of this, but throws away the result.
321 ldver=`$LD --version 2>/dev/null | head -1 | \
322 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
324 glibcpp_gnu_ld_version=`echo $ldver | \
325 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
328 if test "$with_gnu_ld" = "notbroken"; then
329 # GNU ld it is! Joy and bunny rabbits!
331 # All these tests are for C++; save the language and the compiler flags.
332 # Need to do this so that g++ won't try to link in libstdc++
333 ac_test_CFLAGS="${CFLAGS+set}"
334 ac_save_CFLAGS="$CFLAGS"
335 CFLAGS='-x c++ -Wl,--gc-sections'
337 # Check for -Wl,--gc-sections
338 # XXX This test is broken at the moment, as symbols required for
339 # linking are now in libsupc++ (not built yet.....). In addition,
340 # this test has cored on solaris in the past. In addition,
341 # --gc-sections doesn't really work at the moment (keeps on discarding
342 # used sections, first .eh_frame and now some of the glibc sections for
343 # iconv). Bzzzzt. Thanks for playing, maybe next time.
344 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
352 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
353 if test "$ac_test_CFLAGS" = set; then
354 CFLAGS="$ac_save_CFLAGS"
356 # this is the suspicious part
359 if test "$ac_sectionLDflags" = "yes"; then
360 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
362 AC_MSG_RESULT($ac_sectionLDflags)
365 # Set linker optimization flags.
366 if test x"$with_gnu_ld" = x"yes"; then
367 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
370 AC_SUBST(SECTION_LDFLAGS)
371 AC_SUBST(OPT_LDFLAGS)
376 dnl Check to see if the (math function) argument passed is
377 dnl declared when using the c++ compiler
378 dnl ASSUMES argument is a math function with ONE parameter
380 dnl GLIBCPP_CHECK_MATH_DECL_1
381 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_1, [
382 AC_MSG_CHECKING([for $1 declaration])
383 if test x${glibcpp_cv_func_$1_use+set} != xset; then
384 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
387 AC_TRY_COMPILE([#include <math.h>
393 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
397 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
401 dnl Check to see if the (math function) argument passed is
402 dnl 1) declared when using the c++ compiler
403 dnl 2) has "C" linkage
404 dnl 3) if not, see if 1) and 2) for argument prepended with '_'
406 dnl Define HAVE_CARGF etc if "cargf" is declared and links
408 dnl argument 1 is name of function to check
410 dnl ASSUMES argument is a math function with ONE parameter
412 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1
413 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, [
414 GLIBCPP_CHECK_MATH_DECL_1($1)
415 if test x$glibcpp_cv_func_$1_use = x"yes"; then
418 GLIBCPP_CHECK_MATH_DECL_1(_$1)
419 if test x$glibcpp_cv_func__$1_use = x"yes"; then
427 dnl Like GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, but does a bunch of
428 dnl of functions at once. It's an all-or-nothing check -- either
429 dnl HAVE_XYZ is defined for each of the functions, or for none of them.
430 dnl Doing it this way saves significant configure time.
431 AC_DEFUN(GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1, [
432 AC_MSG_CHECKING([for $1 functions])
433 AC_CACHE_VAL(glibcpp_cv_func_$2_use, [
436 AC_TRY_COMPILE([#include <math.h>],
437 [ `for x in $3; do echo "$x (0);"; done` ],
438 [glibcpp_cv_func_$2_use=yes],
439 [glibcpp_cv_func_$2_use=no])
441 AC_MSG_RESULT($glibcpp_cv_func_$2_use)
442 if test x$glibcpp_cv_func_$2_use = x"yes"; then
448 dnl Check to see if the (math function) argument passed is
449 dnl declared when using the c++ compiler
450 dnl ASSUMES argument is a math function with TWO parameters
452 dnl GLIBCPP_CHECK_MATH_DECL_2
453 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_2, [
454 AC_MSG_CHECKING([for $1 declaration])
455 if test x${glibcpp_cv_func_$1_use+set} != xset; then
456 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
459 AC_TRY_COMPILE([#include <math.h>],
461 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
465 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
469 dnl Check to see if the (math function) argument passed is
470 dnl 1) declared when using the c++ compiler
471 dnl 2) has "C" linkage
473 dnl Define HAVE_CARGF etc if "cargf" is declared and links
475 dnl argument 1 is name of function to check
477 dnl ASSUMES argument is a math function with TWO parameters
479 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2
480 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2, [
481 GLIBCPP_CHECK_MATH_DECL_2($1)
482 if test x$glibcpp_cv_func_$1_use = x"yes"; then
485 GLIBCPP_CHECK_MATH_DECL_2(_$1)
486 if test x$glibcpp_cv_func__$1_use = x"yes"; then
494 dnl Check to see if the (math function) argument passed is
495 dnl declared when using the c++ compiler
496 dnl ASSUMES argument is a math function with THREE parameters
498 dnl GLIBCPP_CHECK_MATH_DECL_3
499 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_3, [
500 AC_MSG_CHECKING([for $1 declaration])
501 if test x${glibcpp_cv_func_$1_use+set} != xset; then
502 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
505 AC_TRY_COMPILE([#include <math.h>],
507 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
511 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
515 dnl Check to see if the (math function) argument passed is
516 dnl 1) declared when using the c++ compiler
517 dnl 2) has "C" linkage
519 dnl Define HAVE_CARGF etc if "cargf" is declared and links
521 dnl argument 1 is name of function to check
523 dnl ASSUMES argument is a math function with THREE parameters
525 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3
526 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3, [
527 GLIBCPP_CHECK_MATH_DECL_3($1)
528 if test x$glibcpp_cv_func_$1_use = x"yes"; then
531 GLIBCPP_CHECK_MATH_DECL_3(_$1)
532 if test x$glibcpp_cv_func__$1_use = x"yes"; then
540 dnl Check to see if the (stdlib function) argument passed is
541 dnl 1) declared when using the c++ compiler
542 dnl 2) has "C" linkage
544 dnl argument 1 is name of function to check
546 dnl ASSUMES argument is a math function with TWO parameters
548 dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2
549 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
550 AC_MSG_CHECKING([for $1 declaration])
551 if test x${glibcpp_cv_func_$1_use+set} != xset; then
552 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
555 AC_TRY_COMPILE([#include <stdlib.h>],
557 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
561 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
562 if test x$glibcpp_cv_func_$1_use = x"yes"; then
569 dnl Check to see if the (stdlib function) argument passed is
570 dnl 1) declared when using the c++ compiler
571 dnl 2) has "C" linkage
573 dnl argument 1 is name of function to check
575 dnl ASSUMES argument is a function with THREE parameters
577 dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_3
578 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_3, [
579 AC_MSG_CHECKING([for $1 declaration])
580 if test x${glibcpp_cv_func_$1_use+set} != xset; then
581 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
584 AC_TRY_COMPILE([#include <stdlib.h>],
586 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
590 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
591 if test x$glibcpp_cv_func_$1_use = x"yes"; then
597 dnl Because the builtins are picky picky picky about the arguments they take,
598 dnl do an explict linkage tests here.
599 dnl Check to see if the (math function) argument passed is
600 dnl 1) declared when using the c++ compiler
601 dnl 2) has "C" linkage
603 dnl Define HAVE_CARGF etc if "cargf" is declared and links
605 dnl argument 1 is name of function to check
607 dnl ASSUMES argument is a math function with ONE parameter
609 dnl GLIBCPP_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
610 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
611 AC_MSG_CHECKING([for $1 declaration])
612 if test x${glibcpp_cv_func_$1_use+set} != xset; then
613 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
616 AC_TRY_COMPILE([#include <math.h>],
618 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
622 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
623 if test x$glibcpp_cv_func_$1_use = x"yes"; then
624 AC_MSG_CHECKING([for $1 linkage])
625 if test x${glibcpp_cv_func_$1_link+set} != xset; then
626 AC_CACHE_VAL(glibcpp_cv_func_$1_link, [
627 AC_TRY_LINK([#include <math.h>],
629 [glibcpp_cv_func_$1_link=yes], [glibcpp_cv_func_$1_link=no])
632 AC_MSG_RESULT($glibcpp_cv_func_$1_link)
633 if test x$glibcpp_cv_func_$1_link = x"yes"; then
634 ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
635 AC_DEFINE_UNQUOTED(${ac_tr_func})
642 dnl Check to see what builtin math functions are supported
644 dnl check for __builtin_abs
645 dnl check for __builtin_fabsf
646 dnl check for __builtin_fabs
647 dnl check for __builtin_fabl
648 dnl check for __builtin_labs
649 dnl check for __builtin_sqrtf
650 dnl check for __builtin_sqrtl
651 dnl check for __builtin_sqrt
652 dnl check for __builtin_sinf
653 dnl check for __builtin_sin
654 dnl check for __builtin_sinl
655 dnl check for __builtin_cosf
656 dnl check for __builtin_cos
657 dnl check for __builtin_cosl
659 dnl GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
660 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT, [
661 dnl Test for builtin math functions.
662 dnl These are made in gcc/c-common.c
663 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
664 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
665 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
666 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
667 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
669 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
670 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrt)
671 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
673 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
674 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
675 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
677 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
678 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
679 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
681 dnl There is, without a doubt, a more elegant way to have these
682 dnl names exported so that they won't be stripped out of acconfig.h by
683 dnl autoheader. I leave this as an exercise to somebody less frustrated
684 dnl than I.... please email the libstdc++ list if you can figure out a
685 dnl more elegant approach (see autoconf/acgen.m4 and specifically
686 dnl AC_CHECK_FUNC for things to steal.)
688 if test x$dummyvar = x"yes"; then
689 AC_DEFINE(HAVE___BUILTIN_ABS)
690 AC_DEFINE(HAVE___BUILTIN_LABS)
691 AC_DEFINE(HAVE___BUILTIN_COS)
692 AC_DEFINE(HAVE___BUILTIN_COSF)
693 AC_DEFINE(HAVE___BUILTIN_COSL)
694 AC_DEFINE(HAVE___BUILTIN_FABS)
695 AC_DEFINE(HAVE___BUILTIN_FABSF)
696 AC_DEFINE(HAVE___BUILTIN_FABSL)
697 AC_DEFINE(HAVE___BUILTIN_SIN)
698 AC_DEFINE(HAVE___BUILTIN_SINF)
699 AC_DEFINE(HAVE___BUILTIN_SINL)
700 AC_DEFINE(HAVE___BUILTIN_SQRT)
701 AC_DEFINE(HAVE___BUILTIN_SQRTF)
702 AC_DEFINE(HAVE___BUILTIN_SQRTL)
707 dnl Check to see what the underlying c library is like
708 dnl These checks need to do two things:
709 dnl 1) make sure the name is declared when using the c++ compiler
710 dnl 2) make sure the name has "C" linkage
711 dnl This might seem like overkill but experience has shown that it's not...
713 dnl Define HAVE_STRTOLD if "strtold" is declared and links
714 dnl Define HAVE_STRTOF if "strtof" is declared and links
715 dnl Define HAVE_DRAND48 if "drand48" is declared and links
717 dnl GLIBCPP_CHECK_STDLIB_SUPPORT
718 AC_DEFUN(GLIBCPP_CHECK_STDLIB_SUPPORT, [
719 ac_test_CXXFLAGS="${CXXFLAGS+set}"
720 ac_save_CXXFLAGS="$CXXFLAGS"
721 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
723 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
724 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtof)
725 AC_CHECK_FUNCS(drand48)
727 CXXFLAGS="$ac_save_CXXFLAGS"
731 dnl Check to see what the underlying c library or math library is like.
732 dnl These checks need to do two things:
733 dnl 1) make sure the name is declared when using the c++ compiler
734 dnl 2) make sure the name has "C" linkage
735 dnl This might seem like overkill but experience has shown that it's not...
737 dnl Define HAVE_CARGF etc if "cargf" is found.
739 dnl GLIBCPP_CHECK_MATH_SUPPORT
740 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
741 ac_test_CXXFLAGS="${CXXFLAGS+set}"
742 ac_save_CXXFLAGS="$CXXFLAGS"
743 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
746 AC_CHECK_LIB(m, sin, libm="-lm")
750 dnl Check to see if certain C math functions exist.
751 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
752 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
753 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
754 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
755 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
756 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
757 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
758 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypot)
760 dnl Check to see if basic C math functions have float versions.
761 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
766 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
769 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expf)
770 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
771 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
772 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2f)
773 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
774 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
775 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
776 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypotf)
777 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
778 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
779 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
780 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
781 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
782 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
783 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
784 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
786 dnl Check to see if basic C math functions have long double versions.
787 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
792 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
795 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
796 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
797 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
798 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
799 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
800 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
801 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
802 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
803 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypotl)
804 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
805 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
806 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
807 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
808 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
809 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
810 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
811 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
813 dnl Some runtimes have these functions with a preceding underscore. Please
814 dnl keep this sync'd with the one above. And if you add any new symbol,
815 dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
816 dnl Check to see if certain C math functions exist.
818 dnl Check to see if basic C math functions have float versions.
819 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig,
821 _acosf _asinf _atanf \
823 _coshf _sinhf _tanhf)
824 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round,
828 dnl Check to see if basic C math functions have long double versions.
829 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig,
831 _acosl _asinl _atanl \
833 _coshl _sinhl _tanhl)
834 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round,
839 CXXFLAGS="$ac_save_CXXFLAGS"
844 dnl Check to see if there is native support for complex
846 dnl Don't compile bits in math/* if native support exits.
848 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "copysignl" is found.
850 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
851 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
852 dnl Check for complex versions of math functions of platform.
853 AC_CHECK_LIB(m, main)
854 AC_REPLACE_MATHFUNCS(nan copysignf)
856 dnl For __signbit to signbit conversions.
857 AC_CHECK_FUNCS([__signbit], , [LIBMATHOBJS="$LIBMATHOBJS signbit.lo"])
858 AC_CHECK_FUNCS([__signbitf], , [LIBMATHOBJS="$LIBMATHOBJS signbitf.lo"])
860 dnl Compile the long double complex functions only if the function
861 dnl provides the non-complex long double functions that are needed.
862 dnl Currently this includes copysignl, which should be
863 dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
864 if test x$ac_cv_func_copysignl = x"yes"; then
865 AC_CHECK_FUNCS([__signbitl], , [LIBMATHOBJS="$LIBMATHOBJS signbitl.lo"])
868 if test -n "$LIBMATHOBJS"; then
871 AC_SUBST(LIBMATHOBJS)
872 AM_CONDITIONAL(GLIBCPP_BUILD_LIBMATH, test "$need_libmath" = yes)
876 dnl Check to see what architecture and operating system we are compiling
877 dnl for. Also, if architecture- or OS-specific flags are required for
878 dnl compilation, pick them up here.
880 dnl GLIBCPP_CHECK_HOST
881 AC_DEFUN(GLIBCPP_CHECK_HOST, [
882 . [$]{glibcpp_basedir}/configure.host
883 AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
884 AC_MSG_RESULT(OS config directory is $os_include_dir)
889 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
890 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
891 dnl must have been previously checked.)
893 dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found
894 dnl Define HAVE_MBSTATE_T if mbstate_t is not in wchar.h
896 dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT
897 AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [
898 dnl Wide characters disabled by default.
901 dnl Test wchar.h for mbstate_t, which is needed for char_traits and
902 dnl others even if wchar_t support is not on.
903 AC_MSG_CHECKING([for mbstate_t])
904 AC_TRY_COMPILE([#include <wchar.h>],
905 [mbstate_t teststate;],
906 have_mbstate_t=yes, have_mbstate_t=no)
907 AC_MSG_RESULT($have_mbstate_t)
908 if test x"$have_mbstate_t" = xyes; then
909 AC_DEFINE(HAVE_MBSTATE_T)
912 dnl Sanity check for existence of ISO C99 headers for extended encoding.
913 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
914 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
916 dnl Only continue checking if the ISO C99 headers exist and support is on.
917 if test x"$ac_has_wchar_h" = xyes &&
918 test x"$ac_has_wctype_h" = xyes &&
919 test x"$enable_c_mbchar" != xno; then
921 dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
922 dnl numeric_limits can instantiate type_traits<wchar_t>
923 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
924 AC_TRY_COMPILE([#include <wchar.h>],
925 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
926 has_wchar_minmax=yes, has_wchar_minmax=no)
927 AC_MSG_RESULT($has_wchar_minmax)
929 dnl Test wchar.h for WEOF, which is what we use to determine whether
930 dnl to specialize for char_traits<wchar_t> or not.
931 AC_MSG_CHECKING([for WEOF])
934 #include <stddef.h>],
936 has_weof=yes, has_weof=no)
937 AC_MSG_RESULT($has_weof)
939 dnl Tests for wide character functions used in char_traits<wchar_t>.
941 AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset,, \
944 dnl Checks for names injected into std:: by the c_std headers.
945 AC_CHECK_FUNCS(btowc wctob fgetwc fgetws fputwc fputws fwide \
946 fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
947 vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
948 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
949 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
950 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr,, \
953 AC_MSG_CHECKING([for ISO C99 wchar_t support])
954 if test x"$has_weof" = xyes &&
955 test x"$has_wchar_minmax" = xyes &&
956 test x"$ac_wfuncs" = xyes; then
957 ac_isoC99_wchar_t=yes
961 AC_MSG_RESULT($ac_isoC99_wchar_t)
963 dnl Use iconv for wchar_t to char conversions. As such, check for
964 dnl X/Open Portability Guide, version 2 features (XPG2).
965 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
966 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
968 dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
969 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
971 LIBS="$LIBS $libiconv"
973 AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
974 ac_XPG2funcs=yes, ac_XPG2funcs=no)
978 AC_MSG_CHECKING([for XPG2 wchar_t support])
979 if test x"$ac_has_iconv_h" = xyes &&
980 test x"$ac_has_langinfo_h" = xyes &&
981 test x"$ac_XPG2funcs" = xyes; then
986 AC_MSG_RESULT($ac_XPG2_wchar_t)
988 dnl At the moment, only enable wchar_t specializations if all the
989 dnl above support is present.
990 if test x"$ac_isoC99_wchar_t" = xyes &&
991 test x"$ac_XPG2_wchar_t" = xyes; then
992 AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
996 AC_MSG_CHECKING([for enabled wchar_t specializations])
997 AC_MSG_RESULT($enable_wchar_t)
998 AM_CONDITIONAL(GLIBCPP_TEST_WCHAR_T, test "$enable_wchar_t" = yes)
1003 dnl Check to see if debugging libraries are to be built.
1005 dnl GLIBCPP_ENABLE_DEBUG
1008 dnl builds a separate set of debugging libraries in addition to the
1009 dnl normal (shared, static) libstdc++ binaries.
1012 dnl builds only one (non-debug) version of libstdc++.
1014 dnl --enable-debug-flags=FLAGS
1015 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1017 dnl + Usage: GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
1018 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1019 dnl defaults to `no'.
1020 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
1021 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
1022 AC_ARG_ENABLE(debug,
1023 changequote(<<, >>)dnl
1024 << --enable-debug build extra debug library [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
1025 changequote([, ])dnl
1026 [case "${enableval}" in
1027 yes) enable_debug=yes ;;
1028 no) enable_debug=no ;;
1029 *) AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
1031 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
1032 AC_MSG_CHECKING([for additional debug build])
1033 AC_MSG_RESULT($enable_debug)
1034 AM_CONDITIONAL(GLIBCPP_BUILD_DEBUG, test "$enable_debug" = yes)
1038 dnl Check for explicit debug flags.
1040 dnl GLIBCPP_ENABLE_DEBUG_FLAGS
1042 dnl --enable-debug-flags='-O1'
1043 dnl is a general method for passing flags to be used when
1044 dnl building debug libraries with --enable-debug.
1046 dnl --disable-debug-flags does nothing.
1047 dnl + Usage: GLIBCPP_ENABLE_DEBUG_FLAGS(default flags)
1048 dnl If "default flags" is an empty string (or "none"), the effect is
1049 dnl the same as --disable or --enable=no.
1050 AC_DEFUN(GLIBCPP_ENABLE_DEBUG_FLAGS, [dnl
1051 define([GLIBCPP_ENABLE_DEBUG_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
1052 AC_ARG_ENABLE(debug_flags,
1053 changequote(<<, >>)dnl
1054 << --enable-debug-flags=FLAGS pass compiler FLAGS when building debug
1055 library;[default=>>GLIBCPP_ENABLE_DEBUG_FLAGS_DEFAULT],
1056 changequote([, ])dnl
1057 [case "${enableval}" in
1059 -*) enable_debug_flags="${enableval}" ;;
1060 *) AC_MSG_ERROR([Unknown argument to extra debugging flags]) ;;
1062 enable_debug_flags=GLIBCPP_ENABLE_DEBUG_FLAGS_DEFAULT)dnl
1064 dnl Option parsed, now set things appropriately
1065 case x"$enable_debug" in
1067 case "$enable_debug_flags" in
1069 DEBUG_FLAGS="-g3 -O0";;
1071 DEBUG_FLAGS="${enableval}"
1078 AC_SUBST(DEBUG_FLAGS)
1080 AC_MSG_CHECKING([for debug build flags])
1081 AC_MSG_RESULT($DEBUG_FLAGS)
1086 dnl Check for "unusual" flags to pass to the compiler while building.
1088 dnl GLIBCPP_ENABLE_CXX_FLAGS
1089 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1090 dnl experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
1091 dnl Somehow this same set of flags must be passed when [re]building
1093 dnl --disable-cxx-flags passes nothing.
1094 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1095 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1096 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1097 dnl + Usage: GLIBCPP_ENABLE_CXX_FLAGS(default flags)
1098 dnl If "default flags" is an empty string (or "none"), the effect is
1099 dnl the same as --disable or --enable=no.
1100 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
1101 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
1102 AC_MSG_CHECKING([for extra compiler flags for building])
1103 AC_ARG_ENABLE(cxx_flags,
1104 changequote(<<, >>)dnl
1105 << --enable-cxx-flags=FLAGS pass compiler FLAGS when building library;
1106 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
1107 changequote([, ])dnl
1108 [case "x$enable_cxx_flags" in
1110 AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
1112 enable_cxx_flags='' ;;
1114 enable_cxx_flags="$enableval" ;;
1116 enable_cxx_flags=GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT)
1118 dnl Run through flags (either default or command-line) and set anything
1119 dnl extra (e.g., #defines) that must accompany particular g++ options.
1120 if test -n "$enable_cxx_flags"; then
1121 for f in $enable_cxx_flags; do
1125 *) # and we're trying to pass /what/ exactly?
1126 AC_MSG_ERROR([compiler flags start with a -]) ;;
1130 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1131 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1132 AC_SUBST(EXTRA_CXX_FLAGS)
1137 dnl Check for which locale library to use: gnu or generic.
1139 dnl GLIBCPP_ENABLE_CLOCALE
1140 dnl --enable-clocale=gnu sets config/locale/c_locale_gnu.cc and friends
1141 dnl --enable-clocale=generic sets config/locale/c_locale_generic.cc and friends
1143 dnl default is generic
1145 AC_DEFUN(GLIBCPP_ENABLE_CLOCALE, [
1146 AC_MSG_CHECKING([for clocale to use])
1147 AC_ARG_ENABLE(clocale,
1148 [ --enable-clocale enable model for target locale package.
1149 --enable-clocale=MODEL use MODEL target-speific locale package. [default=generic]
1151 if test x$enable_clocale = xno; then
1156 enable_clocale_flag=$enable_clocale
1158 dnl Probe for locale support if no specific model is specified.
1159 dnl Default to "generic"
1160 if test x$enable_clocale_flag = xno; then
1161 case x${target_os} in
1163 AC_EGREP_CPP([_GLIBCPP_ok], [
1164 #include <features.h>
1165 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1168 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1170 # Test for bugs early in glibc-2.2.x series
1171 if test x$enable_clocale_flag = xgnu; then
1173 #define _GNU_SOURCE 1
1176 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1177 extern __typeof(newlocale) __newlocale;
1178 extern __typeof(duplocale) __duplocale;
1179 extern __typeof(strcoll_l) __strcoll_l;
1183 const char __one[] = "Äuglein Augmen";
1184 const char __two[] = "Äuglein";
1189 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1190 loc_dup = __duplocale(loc);
1191 i = __strcoll_l(__one, __two, loc);
1192 j = __strcoll_l(__one, __two, loc_dup);
1196 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1197 [enable_clocale_flag=generic])
1200 # ... at some point put __strxfrm_l tests in as well.
1203 enable_clocale_flag=generic
1208 dnl Deal with gettext issues.
1210 [ --enable-nls use Native Language Support (default)],
1214 dnl Set configure bits for specified locale package
1215 case x${enable_clocale_flag} in
1217 AC_MSG_RESULT(generic)
1219 CLOCALE_H=config/locale/generic/c_locale.h
1220 CLOCALE_CC=config/locale/generic/c_locale.cc
1221 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1222 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1223 CCOLLATE_CC=config/locale/generic/collate_members.cc
1224 CCTYPE_CC=config/locale/generic/ctype_members.cc
1225 CMESSAGES_H=config/locale/generic/messages_members.h
1226 CMESSAGES_CC=config/locale/generic/messages_members.cc
1227 CMONEY_CC=config/locale/generic/monetary_members.cc
1228 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1229 CTIME_H=config/locale/generic/time_members.h
1230 CTIME_CC=config/locale/generic/time_members.cc
1231 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1236 # Declare intention to use gettext, and add support for specific
1238 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1241 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1242 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1243 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1246 # Export the build objects.
1247 for ling in $ALL_LINGUAS; do \
1248 glibcpp_MOFILES="$glibcpp_MOFILES $ling.mo"; \
1249 glibcpp_POFILES="$glibcpp_POFILES $ling.po"; \
1251 AC_SUBST(glibcpp_MOFILES)
1252 AC_SUBST(glibcpp_POFILES)
1254 CLOCALE_H=config/locale/gnu/c_locale.h
1255 CLOCALE_CC=config/locale/gnu/c_locale.cc
1256 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1257 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1258 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1259 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1260 CMESSAGES_H=config/locale/gnu/messages_members.h
1261 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1262 CMONEY_CC=config/locale/gnu/monetary_members.cc
1263 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1264 CTIME_H=config/locale/gnu/time_members.h
1265 CTIME_CC=config/locale/gnu/time_members.cc
1266 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1269 AC_MSG_RESULT(IEEE 1003.1)
1271 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1272 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1273 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1274 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1275 CCOLLATE_CC=config/locale/generic/collate_members.cc
1276 CCTYPE_CC=config/locale/generic/ctype_members.cc
1277 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1278 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1279 CMONEY_CC=config/locale/generic/monetary_members.cc
1280 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1281 CTIME_H=config/locale/generic/time_members.h
1282 CTIME_CC=config/locale/generic/time_members.cc
1283 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1286 echo "$enable_clocale is an unknown locale package" 1>&2
1291 # This is where the testsuite looks for locale catalogs, using the
1292 # -DLOCALEDIR define during testsuite compilation.
1293 glibcpp_localedir=${glibcpp_builddir}/po/share/locale
1294 AC_SUBST(glibcpp_localedir)
1296 # A standalone libintl (e.g., GNU libintl) may be in use.
1297 if test $USE_NLS = yes; then
1298 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1299 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1301 if test $USE_NLS = yes; then
1302 AC_DEFINE(_GLIBCPP_USE_NLS)
1307 AC_SUBST(CCODECVT_H)
1308 AC_SUBST(CMESSAGES_H)
1309 AC_SUBST(CCODECVT_CC)
1310 AC_SUBST(CCOLLATE_CC)
1312 AC_SUBST(CMESSAGES_CC)
1314 AC_SUBST(CNUMERIC_CC)
1317 AC_SUBST(CLOCALE_CC)
1318 AC_SUBST(CLOCALE_INTERNAL_H)
1323 dnl Check for which I/O library to use: libio, or something specific.
1325 dnl GLIBCPP_ENABLE_CSTDIO
1326 dnl --enable-cstdio=libio sets config/io/c_io_libio.h and friends
1328 dnl default is stdio
1330 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1331 AC_MSG_CHECKING([for cstdio to use])
1332 AC_ARG_ENABLE(cstdio,
1333 [ --enable-cstdio enable stdio for target io package.
1334 --enable-cstdio=LIB use LIB target-speific io package. [default=stdio]
1336 if test x$enable_cstdio = xno; then
1339 enable_cstdio=stdio)
1341 enable_cstdio_flag=$enable_cstdio
1343 dnl Check if a valid I/O package
1344 case x${enable_cstdio_flag} in
1346 CSTDIO_H=config/io/c_io_libio.h
1347 BASIC_FILE_H=config/io/basic_file_libio.h
1348 BASIC_FILE_CC=config/io/basic_file_libio.cc
1349 AC_MSG_RESULT(libio)
1351 # see if we are on a system with libio native (ie, linux)
1352 AC_CHECK_HEADER(libio.h, has_libio=yes, has_libio=no)
1354 # Need to check and see what version of glibc is being used. If
1355 # it's not glibc-2.2 or higher, then we'll need to go ahead and
1356 # compile most of libio for linux systems.
1357 if test x$has_libio = x"yes"; then
1360 AC_MSG_CHECKING([for glibc version >= 2.2])
1361 AC_EGREP_CPP([ok], [
1362 #include <features.h>
1363 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1366 ], glibc_satisfactory=yes, glibc_satisfactory=no)
1367 AC_MSG_RESULT($glibc_satisfactory)
1371 # XXX at the moment, admit defeat and force the recompilation
1372 # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1373 glibc_satisfactory=no
1375 if test x$glibc_satisfactory = x"yes"; then
1380 # bkoz XXX need to add checks to enable this
1381 # pme XXX here's a first pass at such a check
1382 if test x$enable_c_mbchar != xno; then
1390 # Using libio, but <libio.h> doesn't exist on the target system. . .
1392 # bkoz XXX need to add checks to enable this
1393 # pme XXX here's a first pass at such a check
1394 if test x$enable_c_mbchar != xno; then
1401 xstdio | x | xno | xnone | xyes)
1403 CSTDIO_H=config/io/c_io_stdio.h
1404 BASIC_FILE_H=config/io/basic_file_stdio.h
1405 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1406 AC_MSG_RESULT(stdio)
1408 # We're not using stdio.
1413 echo "$enable_cstdio is an unknown io package" 1>&2
1418 AC_SUBST(BASIC_FILE_H)
1419 AC_SUBST(BASIC_FILE_CC)
1421 # 2000-08-04 bkoz hack
1422 CCODECVT_C=config/io/c_io_libio_codecvt.c
1423 AC_SUBST(CCODECVT_C)
1424 # 2000-08-04 bkoz hack
1426 AM_CONDITIONAL(GLIBCPP_BUILD_LIBIO,
1427 test "$need_libio" = yes || test "$need_wlibio" = yes)
1428 AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1429 AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1430 if test "$need_libio" = yes || test "$need_wlibio" = yes; then
1431 libio_la=../libio/libio.la
1440 dnl Check to see if building and using a C++ precompiled header can be done.
1442 dnl GLIBCPP_CHECK_PCH
1444 dnl If it looks like it may work, flip bits on in include/Makefile.am
1446 AC_DEFUN(GLIBCPP_CHECK_PCH, [
1447 ac_test_CXXFLAGS="${CXXFLAGS+set}"
1448 ac_save_CXXFLAGS="$CXXFLAGS"
1449 CXXFLAGS='-Werror -Winvalid-pch -Wno-deprecated -x c++-header'
1451 AC_MSG_CHECKING([for compiler that seems to compile .gch files])
1452 if test x${glibcpp_pch_comp+set} != xset; then
1453 AC_CACHE_VAL(glibcpp_pch_comp, [
1456 AC_TRY_COMPILE([#include <math.h>
1459 [glibcpp_pch_comp=yes], [glibcpp_pch_comp=no])
1463 AC_MSG_RESULT([$glibcpp_pch_comp])
1465 CXXFLAGS="$ac_save_CXXFLAGS"
1466 AM_CONDITIONAL(GLIBCPP_BUILD_PCH, test "$glibcpp_pch_comp" = yes)
1467 if test "$glibcpp_pch_comp" = yes; then
1468 glibcpp_PCHFLAGS="-include bits/stdc++.h"
1472 AC_SUBST(glibcpp_PCHFLAGS)
1476 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1477 dnl We must stage the required headers so that they will be installed
1478 dnl with the library (unlike libgcc, the STL implementation is provided
1479 dnl solely within headers). Since we must not inject random user-space
1480 dnl macro names into user-provided C++ code, we first stage into <file>-in
1481 dnl and process to <file> with an output command. The reason for a two-
1482 dnl stage process here is to correctly handle $srcdir!=$objdir without
1483 dnl having to write complex code (the sed commands to clean the macro
1484 dnl namespace are complex and fragile enough as it is). We must also
1485 dnl add a relative path so that -I- is supported properly.
1487 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1488 AC_MSG_CHECKING([for thread model used by GCC])
1489 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
1490 AC_MSG_RESULT([$target_thread_file])
1492 if test $target_thread_file != single; then
1493 AC_DEFINE(HAVE_GTHR_DEFAULT)
1494 AC_DEFINE(_GLIBCPP_SUPPORTS_WEAK, __GXX_WEAK__)
1497 glibcpp_thread_h=gthr-$target_thread_file.h
1498 AC_SUBST(glibcpp_thread_h)
1503 dnl Check for exception handling support. If an explicit enable/disable
1504 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1505 dnl target may or may not support call frame exceptions.
1507 dnl GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
1508 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1509 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1511 dnl Define _GLIBCPP_SJLJ_EXCEPTIONS if the compiler is configured for it.
1513 AC_DEFUN(GLIBCPP_ENABLE_SJLJ_EXCEPTIONS, [
1514 AC_MSG_CHECKING([for exception model to use])
1517 AC_ARG_ENABLE(sjlj-exceptions,
1518 [ --enable-sjlj-exceptions force use of builtin_setjmp for exceptions],
1520 [dnl Botheration. Now we've got to detect the exception model.
1521 dnl Link tests against libgcc.a are problematic since -- at least
1522 dnl as of this writing -- we've not been given proper -L bits for
1523 dnl single-tree newlib and libgloss.
1525 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
1526 dnl conftest files before we got a change to grep them first.
1527 cat > conftest.$ac_ext << EOF
1528 [#]line __oline__ "configure"
1537 old_CXXFLAGS="$CXXFLAGS"
1539 if AC_TRY_EVAL(ac_compile); then
1540 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1541 enable_sjlj_exceptions=yes
1542 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1543 enable_sjlj_exceptions=no
1546 CXXFLAGS="$old_CXXFLAGS"
1548 if test x$enable_sjlj_exceptions = xyes; then
1549 AC_DEFINE(_GLIBCPP_SJLJ_EXCEPTIONS, 1,
1550 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1551 ac_exception_model_name=sjlj
1552 elif test x$enable_sjlj_exceptions = xno; then
1553 ac_exception_model_name="call frame"
1555 AC_MSG_ERROR([unable to detect exception model])
1558 AC_MSG_RESULT($ac_exception_model_name)
1563 dnl Check for libunwind exception handling support. If enabled then
1564 dnl we assume that the _Unwind_* functions that make up the Unwind ABI
1565 dnl (_Unwind_RaiseException, _Unwind_Resume, etc.) are defined by
1566 dnl libunwind instead of libgcc and that libstdc++ has a dependency
1567 dnl on libunwind as well as libgcc.
1569 dnl GLIBCPP_ENABLE_LIBUNWIND_EXCEPTIONS
1570 dnl --enable-libunwind-exceptions forces the use of libunwind.
1571 dnl --disable-libunwind-exceptions assumes there is no libunwind.
1573 dnl Define _GLIBCPP_LIBUNWIND_EXCEPTIONS if requested.
1575 AC_DEFUN(GLIBCPP_ENABLE_LIBUNWIND_EXCEPTIONS, [
1576 AC_MSG_CHECKING([for use of libunwind])
1577 AC_ARG_ENABLE(libunwind-exceptions,
1578 [ --enable-libunwind-exceptions force use of libunwind for exceptions],
1579 use_libunwind_exceptions=$enableval,
1580 use_libunwind_exceptions=no)
1581 AC_MSG_RESULT($use_libunwind_exceptions)
1582 dnl Option parsed, now set things appropriately
1583 if test x"$use_libunwind_exceptions" = xyes; then
1584 LIBUNWIND_FLAG="-lunwind"
1588 AC_SUBST(LIBUNWIND_FLAG)
1592 dnl Check for ISO/IEC 9899:1999 "C99" support.
1594 dnl GLIBCPP_ENABLE_C99
1595 dnl --enable-c99 defines _GLIBCPP_USE_C99
1596 dnl --disable-c99 leaves _GLIBCPP_USE_C99 undefined
1597 dnl + Usage: GLIBCPP_ENABLE_C99[(DEFAULT)]
1598 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1599 dnl defaults to `no'.
1600 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
1602 dnl GLIBCPP_ENABLE_C99
1603 AC_DEFUN(GLIBCPP_ENABLE_C99, [dnl
1604 define([GLIBCPP_ENABLE_C99_DEFAULT], ifelse($1, yes, yes, no))dnl
1607 changequote(<<, >>)dnl
1608 <<--enable-c99 turns on 'ISO/IEC 9899:1999 support' [default=>>GLIBCPP_ENABLE_C99_DEFAULT],
1609 changequote([, ])dnl
1610 [case "$enableval" in
1611 yes) enable_c99=yes ;;
1612 no) enable_c99=no ;;
1613 *) AC_MSG_ERROR([Unknown argument to enable/disable C99]) ;;
1615 enable_c99=GLIBCPP_ENABLE_C99_DEFAULT)dnl
1620 # Check for the existence of <math.h> functions used if C99 is enabled.
1622 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
1623 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
1624 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
1625 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
1626 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
1627 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
1628 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
1629 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
1630 AC_TRY_COMPILE([#include <math.h>],
1631 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
1632 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
1633 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
1634 AC_TRY_COMPILE([#include <math.h>],
1635 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
1636 AC_TRY_COMPILE([#include <math.h>],
1637 [isunordered(0.0,0.0);],, [ac_c99_math=no])
1638 AC_MSG_RESULT($ac_c99_math)
1640 # Check for the existence in <stdio.h> of vscanf, et. al.
1642 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1643 AC_TRY_COMPILE([#include <stdio.h>],
1644 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
1645 AC_TRY_COMPILE([#include <stdio.h>
1647 void foo(char* fmt, ...)
1648 {va_list args; va_start(args, fmt);
1649 vfscanf(stderr, "%i", args);}],
1650 [],, [ac_c99_stdio=no])
1651 AC_TRY_COMPILE([#include <stdio.h>
1653 void foo(char* fmt, ...)
1654 {va_list args; va_start(args, fmt);
1655 vscanf("%i", args);}],
1656 [],, [ac_c99_stdio=no])
1657 AC_TRY_COMPILE([#include <stdio.h>
1659 void foo(char* fmt, ...)
1660 {va_list args; va_start(args, fmt);
1661 vsnprintf(fmt, 0, "%i", args);}],
1662 [],, [ac_c99_stdio=no])
1663 AC_TRY_COMPILE([#include <stdio.h>
1665 void foo(char* fmt, ...)
1666 {va_list args; va_start(args, fmt);
1667 vsscanf(fmt, "%i", args);}],
1668 [],, [ac_c99_stdio=no])
1669 AC_MSG_RESULT($ac_c99_stdio)
1671 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1673 AC_MSG_CHECKING([for lldiv_t declaration])
1674 AC_CACHE_VAL(ac_c99_lldiv_t, [
1675 AC_TRY_COMPILE([#include <stdlib.h>],
1677 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
1679 AC_MSG_RESULT($ac_c99_lldiv_t)
1681 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1682 AC_TRY_COMPILE([#include <stdlib.h>],
1683 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
1684 AC_TRY_COMPILE([#include <stdlib.h>],
1685 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
1686 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
1687 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
1688 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
1689 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
1690 if test x"$ac_c99_lldiv_t" = x"no"; then
1693 AC_MSG_RESULT($ac_c99_stdlib)
1695 # Check for the existence of <wchar.h> functions used if C99 is enabled.
1696 # XXX the wchar.h checks should be rolled into the general C99 bits.
1698 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
1699 AC_TRY_COMPILE([#include <wchar.h>],
1700 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
1701 AC_TRY_COMPILE([#include <wchar.h>],
1702 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
1703 AC_TRY_COMPILE([#include <wchar.h>],
1704 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
1705 AC_MSG_RESULT($ac_c99_wchar)
1707 AC_MSG_CHECKING([for enabled ISO C99 support])
1708 if test x"$ac_c99_math" = x"no" ||
1709 test x"$ac_c99_stdio" = x"no" ||
1710 test x"$ac_c99_stdlib" = x"no" ||
1711 test x"$ac_c99_wchar" = x"no"; then
1714 AC_MSG_RESULT($enable_c99)
1716 # Option parsed, now set things appropriately
1717 if test x"$enable_c99" = x"yes"; then
1718 AC_DEFINE(_GLIBCPP_USE_C99)
1726 dnl Check for template specializations for the 'long long' type extension.
1727 dnl The result determines only whether 'long long' I/O is enabled; things
1728 dnl like numeric_limits<> specializations are always available.
1730 dnl GLIBCPP_ENABLE_LONG_LONG
1731 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1732 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1733 dnl + Usage: GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1734 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1735 dnl defaults to `no'.
1736 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1738 dnl GLIBCPP_ENABLE_LONG_LONG
1739 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1740 define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1742 AC_ARG_ENABLE(long-long,
1743 changequote(<<, >>)dnl
1744 <<--enable-long-long turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1745 changequote([, ])dnl
1746 [case "$enableval" in
1747 yes) enable_long_long=yes ;;
1748 no) enable_long_long=no ;;
1749 *) AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1751 enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1756 AC_MSG_CHECKING([for enabled long long I/O support])
1757 # iostreams require strtoll, strtoull to compile
1758 AC_TRY_COMPILE([#include <stdlib.h>],
1759 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1760 AC_TRY_COMPILE([#include <stdlib.h>],
1761 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1763 # Option parsed, now set things appropriately
1764 if test x"$enable_long_long" = xyes; then
1765 AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1767 AC_MSG_RESULT($enable_long_long)
1774 dnl Check for what type of C headers to use.
1776 dnl GLIBCPP_ENABLE_CHEADERS
1777 dnl --enable-cheaders= [does stuff].
1778 dnl --disable-cheaders [does not do anything, really].
1779 dnl + Usage: GLIBCPP_ENABLE_CHEADERS[(DEFAULT)]
1780 dnl Where DEFAULT is either `c' or `c_std'.
1781 dnl If ommitted, it defaults to `c_std'.
1782 AC_DEFUN(GLIBCPP_ENABLE_CHEADERS, [dnl
1783 define([GLIBCPP_ENABLE_CHEADERS_DEFAULT], ifelse($1, c_std, c_std, c_std))dnl
1784 AC_MSG_CHECKING([for c header strategy to use])
1785 AC_ARG_ENABLE(cheaders,
1786 changequote(<<, >>)dnl
1787 << --enable-cheaders=MODEL construct "C" header files for g++ [default=>>GLIBCPP_ENABLE_CHEADERS_DEFAULT],
1789 [case "$enableval" in
1794 enable_cheaders=c_std
1796 *) AC_MSG_ERROR([Unknown argument to enable/disable "C" headers])
1799 enable_cheaders=GLIBCPP_ENABLE_CHEADERS_DEFAULT)
1800 AC_MSG_RESULT($enable_cheaders)
1802 dnl Option parsed, now set things appropriately
1803 case "$enable_cheaders" in
1805 C_INCLUDE_DIR='${glibcpp_srcdir}/include/c_std'
1808 C_INCLUDE_DIR='${glibcpp_srcdir}/include/c'
1812 AC_SUBST(C_INCLUDE_DIR)
1813 AM_CONDITIONAL(GLIBCPP_C_HEADERS_C, test "$enable_cheaders" = c)
1814 AM_CONDITIONAL(GLIBCPP_C_HEADERS_C_STD, test "$enable_cheaders" = c_std)
1815 AM_CONDITIONAL(GLIBCPP_C_HEADERS_COMPATIBILITY, test "$c_compatibility" = yes)
1820 dnl Check for wide character support. Has the same effect as the option
1821 dnl in gcc's configure, but in a form that autoconf can mess with.
1823 dnl GLIBCPP_ENABLE_C_MBCHAR
1824 dnl --enable-c-mbchar requests all the wchar_t stuff.
1825 dnl --disable-c-mbchar doesn't.
1826 dnl + Usage: GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1827 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1828 dnl defaults to `no'.
1829 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1830 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1831 AC_ARG_ENABLE(c-mbchar,
1832 changequote(<<, >>)dnl
1833 << --enable-c-mbchar enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1834 changequote([, ])dnl
1835 [case "$enableval" in
1836 yes) enable_c_mbchar=yes ;;
1837 no) enable_c_mbchar=no ;;
1838 *) AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1840 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1841 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1846 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1848 dnl TOPLEVEL_INCLUDES
1849 dnl LIBMATH_INCLUDES
1850 dnl LIBSUPCXX_INCLUDES
1853 dnl GLIBCPP_EXPORT_INCLUDES
1854 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1855 # Root level of the build directory include sources.
1856 GLIBCPP_INCLUDES="-I${glibcpp_builddir}/include/${target_alias} -I${glibcpp_builddir}/include"
1858 # Passed down for canadian crosses.
1859 if test x"$CANADIAN" = xyes; then
1860 TOPLEVEL_INCLUDES='-I$(includedir)'
1863 LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1865 LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1867 if test x"$need_libio" = xyes; then
1868 LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1869 AC_SUBST(LIBIO_INCLUDES)
1872 # Now, export this to all the little Makefiles....
1873 AC_SUBST(GLIBCPP_INCLUDES)
1874 AC_SUBST(TOPLEVEL_INCLUDES)
1875 AC_SUBST(LIBMATH_INCLUDES)
1876 AC_SUBST(LIBSUPCXX_INCLUDES)
1881 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1883 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1884 # Optimization flags that are probably a good idea for thrill-seekers. Just
1885 # uncomment the lines below and make, everything else is ready to go...
1886 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1888 AC_SUBST(OPTIMIZE_CXXFLAGS)
1890 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings'
1891 AC_SUBST(WARN_FLAGS)
1895 dnl GLIBCPP_EXPORT_INSTALL_INFO
1896 dnl calculates gxx_install_dir
1897 dnl exports glibcpp_toolexecdir
1898 dnl exports glibcpp_toolexeclibdir
1899 dnl exports glibcpp_prefixdir
1901 dnl Assumes cross_compiling bits already done, and with_cross_host in
1904 dnl GLIBCPP_EXPORT_INSTALL_INFO
1905 AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [
1906 # Assumes glibcpp_builddir, glibcpp_srcdir are alreay set up and
1907 # exported correctly in GLIBCPP_CONFIGURE.
1908 glibcpp_toolexecdir=no
1909 glibcpp_toolexeclibdir=no
1910 glibcpp_prefixdir=${prefix}
1912 # Process the option --with-gxx-include-dir=<path to include-files directory>
1913 AC_MSG_CHECKING([for --with-gxx-include-dir])
1914 AC_ARG_WITH(gxx-include-dir,
1915 [ --with-gxx-include-dir the installation directory for include files],
1916 [case "${withval}" in
1918 AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
1925 gxx_include_dir=${withval}
1927 esac], [gxx_include_dir=no])
1928 AC_MSG_RESULT($gxx_include_dir)
1930 # Process the option "--enable-version-specific-runtime-libs"
1931 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
1932 AC_ARG_ENABLE(version-specific-runtime-libs,
1933 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
1934 [case "$enableval" in
1935 yes) version_specific_libs=yes ;;
1936 no) version_specific_libs=no ;;
1937 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
1939 version_specific_libs=no)dnl
1940 # Option set, now we can test it.
1941 AC_MSG_RESULT($version_specific_libs)
1943 # Default case for install directory for include files.
1944 if test $version_specific_libs = no && test $gxx_include_dir = no; then
1945 gxx_include_dir='$(prefix)'/include/c++/${gcc_version}
1948 # Version-specific runtime libs processing.
1949 if test $version_specific_libs = yes; then
1950 # Need the gcc compiler version to know where to install libraries
1951 # and header files if --enable-version-specific-runtime-libs option
1953 if test x"$gxx_include_dir" = x"no"; then
1954 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/c++
1956 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1957 glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)'
1960 # Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir
1961 # Install a library built with a cross compiler in tooldir, not libdir.
1962 if test x"$glibcpp_toolexecdir" = x"no"; then
1963 if test -n "$with_cross_host" &&
1964 test x"$with_cross_host" != x"no"; then
1965 glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)'
1966 glibcpp_toolexeclibdir='$(toolexecdir)/lib'
1968 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1969 glibcpp_toolexeclibdir='$(libdir)'
1971 multi_os_directory=`$CC -print-multi-os-directory`
1972 case $multi_os_directory in
1973 .) ;; # Avoid trailing /.
1974 *) glibcpp_toolexeclibdir=$glibcpp_toolexeclibdir/$multi_os_directory ;;
1978 AC_MSG_CHECKING([for install location])
1979 AC_MSG_RESULT($gxx_include_dir)
1981 AC_SUBST(glibcpp_prefixdir)
1982 AC_SUBST(gxx_include_dir)
1983 AC_SUBST(glibcpp_toolexecdir)
1984 AC_SUBST(glibcpp_toolexeclibdir)
1988 # Check for functions in math library.
1989 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1991 # This file can be copied and used freely without restrictions. It can
1992 # be used in projects which are not available under the GNU Public License
1993 # but which still want to provide support for the GNU gettext functionality.
1994 # Please note that the actual code is *not* freely available.
1998 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1999 AC_DEFUN(AC_REPLACE_MATHFUNCS,
2000 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])])
2003 dnl This macro searches for a GNU version of make. If a match is found, the
2004 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
2005 dnl set to "#". This is useful for including a special features in a Makefile,
2006 dnl which cannot be handled by other versions of make. The variable
2007 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
2008 dnl the empty string otherwise.
2010 dnl Here is an example of its use:
2012 dnl Makefile.in might contain:
2014 dnl # A failsafe way of putting a dependency rule into a makefile
2016 dnl $(CC) -MM $(srcdir)/*.c > $(DEPEND)
2018 dnl @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
2019 dnl @ifGNUmake@ include $(DEPEND)
2020 dnl @ifGNUmake@ endif
2022 dnl Then configure.in would normally contain:
2024 dnl CHECK_GNU_MAKE()
2025 dnl AC_OUTPUT(Makefile)
2027 dnl Then perhaps to cause gnu make to override any other make, we could do
2028 dnl something like this (note that GNU make always looks for GNUmakefile first):
2030 dnl if ! test x$_cv_gnu_make_command = x ; then
2031 dnl mv Makefile GNUmakefile
2032 dnl echo .DEFAULT: > Makefile ;
2033 dnl echo \ $_cv_gnu_make_command \$@ >> Makefile;
2036 dnl Then, if any (well almost any) other make is called, and GNU make also
2037 dnl exists, then the other make wraps the GNU make.
2039 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
2040 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
2042 dnl #### Changes for libstdc++-v3: reformatting and linewrapping; prepending
2043 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
2044 dnl #### conditional's subshell (" --version" is not a command), using a
2045 dnl #### different option to grep(1).
2047 dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not
2048 dnl #### ${MAKE:-make}).
2051 GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
2052 _cv_gnu_make_command='' ;
2053 dnl Search all the common names for GNU make
2054 for a in "${MAKE-make}" make gmake gnumake ; do
2055 if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
2057 _cv_gnu_make_command=$a ;
2062 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
2063 dnl string, '#' otherwise
2064 if test "x$_cv_gnu_make_command" != "x" ; then
2073 dnl Check for headers for, and arguments to, the setrlimit() function.
2074 dnl Used only in testsuite_hooks.h.
2075 AC_DEFUN(GLIBCPP_CHECK_SETRLIMIT_ancilliary, [
2076 AC_TRY_COMPILE([#include <unistd.h>
2077 #include <sys/time.h>
2078 #include <sys/resource.h>
2079 ], [ int f = RLIMIT_$1 ; ],
2080 [glibcpp_mresult=1], [glibcpp_mresult=0])
2081 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcpp_mresult,
2082 [Only used in build directory testsuite_hooks.h.])
2084 AC_DEFUN(GLIBCPP_CHECK_SETRLIMIT, [
2085 setrlimit_have_headers=yes
2086 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
2088 setrlimit_have_headers=no)
2089 # If don't have the headers, then we can't run the tests now, and we
2090 # won't be seeing any of these during testsuite compilation.
2091 if test $setrlimit_have_headers = yes; then
2092 # Can't do these in a loop, else the resulting syntax is wrong.
2093 GLIBCPP_CHECK_SETRLIMIT_ancilliary(DATA)
2094 GLIBCPP_CHECK_SETRLIMIT_ancilliary(RSS)
2095 GLIBCPP_CHECK_SETRLIMIT_ancilliary(VMEM)
2096 GLIBCPP_CHECK_SETRLIMIT_ancilliary(AS)
2098 # Check for rlimit, setrlimit.
2099 AC_CACHE_VAL(ac_setrlimit, [
2100 AC_TRY_COMPILE([#include <unistd.h>
2101 #include <sys/time.h>
2102 #include <sys/resource.h>
2104 [ struct rlimit r; setrlimit(0, &r);],
2105 [ac_setrlimit=yes], [ac_setrlimit=no])
2109 AC_MSG_CHECKING([for testsuite memory limit support])
2110 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
2112 AC_DEFINE(_GLIBCPP_MEM_LIMITS)
2116 AC_MSG_RESULT($ac_mem_limits)
2121 dnl Does any necessary configuration of the testsuite directory. Generates
2122 dnl the testsuite_hooks.h header.
2124 dnl GLIBCPP_CONFIGURE_TESTSUITE [no args]
2125 AC_DEFUN(GLIBCPP_CONFIGURE_TESTSUITE, [
2126 GLIBCPP_CHECK_SETRLIMIT
2128 # Look for setenv, so that extended locale tests can be performed.
2129 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
2131 # Export file names for ABI checking.
2132 baseline_file="${glibcpp_srcdir}/config/abi/${abi_baseline_triplet}/baseline_symbols.txt"
2133 AC_SUBST(baseline_file)
2136 *-*-cygwin* ) enable_abi_check=no ;;
2137 * ) enable_abi_check=yes ;;
2140 # Don't do ABI checking unless native.
2141 AM_CONDITIONAL(GLIBCPP_BUILD_ABI_CHECK,
2142 test x"$build" = x"$host" && test -z "$with_cross_host" \
2143 && test "$enable_abi_check" = yes )
2147 sinclude(../libtool.m4)
2148 dnl The lines below arrange for aclocal not to bring an installed
2149 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
2150 dnl add a definition of LIBTOOL to Makefile.in.
2151 ifelse(,,,[AC_SUBST(LIBTOOL)
2152 AC_DEFUN([AM_PROG_LIBTOOL])
2153 AC_DEFUN([AC_LIBTOOL_DLOPEN])
2154 AC_DEFUN([AC_PROG_LD])
2158 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
2161 AC_DEFUN(GLIBCPP_CHECK_S_ISREG_OR_S_IFREG, [
2162 AC_CACHE_VAL(glibcpp_cv_S_ISREG, [
2163 AC_TRY_LINK([#include <sys/stat.h>],
2164 [struct stat buffer; fstat(0, &buffer); S_ISREG(buffer.st_mode); ],
2165 [glibcpp_cv_S_ISREG=yes],
2166 [glibcpp_cv_S_ISREG=no])
2168 AC_CACHE_VAL(glibcpp_cv_S_IFREG, [
2169 AC_TRY_LINK([#include <sys/stat.h>],
2170 [struct stat buffer; fstat(0, &buffer); S_IFREG & buffer.st_mode; ],
2171 [glibcpp_cv_S_IFREG=yes],
2172 [glibcpp_cv_S_IFREG=no])
2174 if test x$glibcpp_cv_S_ISREG = xyes; then
2175 AC_DEFINE(HAVE_S_ISREG)
2176 elif test x$glibcpp_cv_S_IFREG = xyes; then
2177 AC_DEFINE(HAVE_S_IFREG)
2182 dnl Check whether poll is available in <poll.h>.
2185 AC_DEFUN(GLIBCPP_CHECK_POLL, [
2186 AC_CACHE_VAL(glibcpp_cv_POLL, [
2187 AC_TRY_COMPILE([#include <poll.h>],
2188 [struct pollfd pfd[1]; pfd[0].events = POLLIN; poll(pfd, 1, 0); ],
2189 [glibcpp_cv_POLL=yes],
2190 [glibcpp_cv_POLL=no])
2192 if test x$glibcpp_cv_POLL = xyes; then
2193 AC_DEFINE(HAVE_POLL)
2197 # Check whether LC_MESSAGES is available in <locale.h>.
2198 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2200 # This file file be copied and used freely without restrictions. It can
2201 # be used in projects which are not available under the GNU Public License
2202 # but which still want to provide support for the GNU gettext functionality.
2203 # Please note that the actual code is *not* freely available.
2207 AC_DEFUN(AC_LC_MESSAGES, [
2208 AC_CHECK_HEADER(locale.h, [
2209 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2210 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2211 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2212 if test $ac_cv_val_LC_MESSAGES = yes; then
2213 AC_DEFINE(HAVE_LC_MESSAGES)
2220 dnl Check for whether the Boost-derived checks should be turned on.
2222 dnl GLIBCPP_ENABLE_CONCEPT_CHECKS
2223 dnl --enable-concept-checks turns them on.
2224 dnl --disable-concept-checks leaves them off.
2225 dnl + Usage: GLIBCPP_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2226 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
2227 dnl defaults to `no'.
2228 AC_DEFUN(GLIBCPP_ENABLE_CONCEPT_CHECKS, [dnl
2229 define([GLIBCPP_ENABLE_CONCEPT_CHECKS_DEFAULT], ifelse($1, yes, yes, no))dnl
2230 AC_ARG_ENABLE(concept-checks,
2231 changequote(<<, >>)dnl
2232 << --enable-concept-checks use Boost-derived template checks [default=>>GLIBCPP_ENABLE_CONCEPT_CHECKS_DEFAULT],
2233 changequote([, ])dnl
2234 [case "$enableval" in
2235 yes) enable_concept_checks=yes ;;
2236 no) enable_concept_checks=no ;;
2237 *) AC_MSG_ERROR([Unknown argument to enable/disable concept checks]) ;;
2239 enable_concept_checks=GLIBCPP_ENABLE_CONCEPT_CHECKS_DEFAULT)dnl
2240 dnl Option parsed, now set things appropriately
2241 if test x"$enable_concept_checks" = xyes; then
2242 AC_DEFINE(_GLIBCPP_CONCEPT_CHECKS)
2248 dnl Add version tags to symbols in shared library (or not), additionally
2249 dnl marking other symbols as private/local (or not).
2251 dnl GLIBCPP_ENABLE_SYMVERS
2252 dnl --enable-symvers=style adds a version script to the linker call when
2253 dnl creating the shared library. The choice of version script is
2254 dnl controlled by 'style'.
2255 dnl --disable-symvers does not.
2256 dnl + Usage: GLIBCPP_ENABLE_SYMVERS[(DEFAULT)]
2257 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
2258 dnl defaults to `no'. Passing `yes' tries to choose a default style
2259 dnl based on linker characteristics. Passing 'no' disables versioning.
2260 AC_DEFUN(GLIBCPP_ENABLE_SYMVERS, [dnl
2261 define([GLIBCPP_ENABLE_SYMVERS_DEFAULT], ifelse($1, yes, yes, no))dnl
2262 AC_ARG_ENABLE(symvers,
2263 changequote(<<, >>)dnl
2264 << --enable-symvers=style enables symbol versioning of the shared library [default=>>GLIBCPP_ENABLE_SYMVERS_DEFAULT],
2265 changequote([, ])dnl
2266 [case "$enableval" in
2267 yes) enable_symvers=yes ;;
2268 no) enable_symvers=no ;;
2269 # other names here, just as sanity checks
2270 #gnu|sun|etcetera) enable_symvers=$enableval ;;
2271 gnu) enable_symvers=$enableval ;;
2272 *) AC_MSG_ERROR([Unknown argument to enable/disable symvers]) ;;
2274 enable_symvers=GLIBCPP_ENABLE_SYMVERS_DEFAULT)dnl
2276 # If we never went through the GLIBCPP_CHECK_LINKER_FEATURES macro, then we
2277 # don't know enough about $LD to do tricks...
2278 if test x$enable_shared = xno ||
2280 test x$glibcpp_gnu_ld_version = x; then
2284 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2285 if test $enable_symvers != no; then
2286 AC_MSG_CHECKING([for shared libgcc])
2287 ac_save_CFLAGS="$CFLAGS"
2289 AC_TRY_LINK(, [return 0], glibcpp_shared_libgcc=yes, glibcpp_shared_libgcc=no)
2290 CFLAGS="$ac_save_CFLAGS"
2291 AC_MSG_RESULT($glibcpp_shared_libgcc)
2294 # For GNU ld, we need at least this version. It's 2.12 in the same format
2295 # as the tested-for version. See GLIBCPP_CHECK_LINKER_FEATURES for more.
2296 glibcpp_min_gnu_ld_version=21200
2298 # Check to see if unspecified "yes" value can win, given results
2300 if test $enable_symvers = yes ; then
2301 if test $with_gnu_ld = yes &&
2302 test $glibcpp_shared_libgcc = yes ;
2304 if test $glibcpp_gnu_ld_version -ge $glibcpp_min_gnu_ld_version ; then
2307 ac_test_CFLAGS="${CFLAGS+set}"
2308 ac_save_CFLAGS="$CFLAGS"
2309 CFLAGS='-shared -Wl,--version-script,conftest.map'
2312 echo 'FOO { global: f[a-z]o; local: *; };' > conftest.map
2314 AC_TRY_LINK([int foo;],, enable_symvers=gnu)
2315 if test "$ac_test_CFLAGS" = set; then
2316 CFLAGS="$ac_save_CFLAGS"
2318 # this is the suspicious part
2329 dnl Everything parsed; figure out what file to use.
2330 case $enable_symvers in
2332 SYMVER_MAP=config/linker-map.dummy
2335 SYMVER_MAP=config/linker-map.gnu
2336 AC_DEFINE(_GLIBCPP_SYMVER)
2340 AC_SUBST(SYMVER_MAP)
2341 AM_CONDITIONAL(GLIBCPP_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
2342 AC_MSG_CHECKING([versioning on shared library symbols])
2343 AC_MSG_RESULT($enable_symvers)