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)/'[$]{glibcpp_basedir} ;;
205 # Set up safe default values for all subsequent AM_CONDITIONAL tests.
215 # Find platform-specific directories containing configuration info. In
216 # addition to possibly modifying the same flags, it also sets up symlinks.
222 dnl Check to see if g++ can compile this library, and if so, if any version-
223 dnl specific precautions need to be taken.
225 dnl GLIBCPP_CHECK_COMPILER_VERSION
226 AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [
227 if test ! -f stamp-sanity-compiler; then
228 AC_MSG_CHECKING([for g++ that will successfully compile libstdc++-v3])
235 ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to GCC 3.0 or above]))
237 AC_MSG_RESULT($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 GLIBCPP_CHECK_COMPILER_FEATURES
256 AC_DEFUN(GLIBCPP_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 GLIBCPP_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($ac_fdsections)
290 AC_SUBST(SECTION_FLAGS)
295 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
296 dnl the native linker is in use, all variables will be defined to something
297 dnl safe (like an empty string).
299 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
300 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
301 dnl Define LD, with_gnu_ld, and (possibly) glibcpp_gnu_ld_version as
302 dnl side-effects of testing.
304 dnl GLIBCPP_CHECK_LINKER_FEATURES
305 AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [
306 # If we're not using GNU ld, then there's no point in even trying these
307 # tests. Check for that first. We should have already tested for gld
308 # by now (in libtool), but require it now just to be safe...
309 test -z "$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 glibcpp_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 GLIBCPP_CHECK_MATH_DECL_1
391 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_1, [
392 AC_MSG_CHECKING([for $1 declaration])
393 if test x${glibcpp_cv_func_$1_use+set} != xset; then
394 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
397 AC_TRY_COMPILE([#include <math.h>
403 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
407 AC_MSG_RESULT($glibcpp_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 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1
423 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, [
424 GLIBCPP_CHECK_MATH_DECL_1($1)
425 if test x$glibcpp_cv_func_$1_use = x"yes"; then
428 GLIBCPP_CHECK_MATH_DECL_1(_$1)
429 if test x$glibcpp_cv_func__$1_use = x"yes"; then
437 dnl Like GLIBCPP_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(GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1, [
442 AC_MSG_CHECKING([for $1 functions])
443 AC_CACHE_VAL(glibcpp_cv_func_$2_use, [
446 AC_TRY_COMPILE([#include <math.h>],
447 [ `for x in $3; do echo "$x (0);"; done` ],
448 [glibcpp_cv_func_$2_use=yes],
449 [glibcpp_cv_func_$2_use=no])
451 AC_MSG_RESULT($glibcpp_cv_func_$2_use)
452 if test x$glibcpp_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 GLIBCPP_CHECK_MATH_DECL_2
463 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_2, [
464 AC_MSG_CHECKING([for $1 declaration])
465 if test x${glibcpp_cv_func_$1_use+set} != xset; then
466 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
469 AC_TRY_COMPILE([#include <math.h>],
471 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
475 AC_MSG_RESULT($glibcpp_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 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2
490 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2, [
491 GLIBCPP_CHECK_MATH_DECL_2($1)
492 if test x$glibcpp_cv_func_$1_use = x"yes"; then
495 GLIBCPP_CHECK_MATH_DECL_2(_$1)
496 if test x$glibcpp_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 GLIBCPP_CHECK_MATH_DECL_3
509 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_3, [
510 AC_MSG_CHECKING([for $1 declaration])
511 if test x${glibcpp_cv_func_$1_use+set} != xset; then
512 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
515 AC_TRY_COMPILE([#include <math.h>],
517 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
521 AC_MSG_RESULT($glibcpp_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 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3
536 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3, [
537 GLIBCPP_CHECK_MATH_DECL_3($1)
538 if test x$glibcpp_cv_func_$1_use = x"yes"; then
541 GLIBCPP_CHECK_MATH_DECL_3(_$1)
542 if test x$glibcpp_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 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2
559 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
560 AC_MSG_CHECKING([for $1 declaration])
561 if test x${glibcpp_cv_func_$1_use+set} != xset; then
562 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
565 AC_TRY_COMPILE([#include <stdlib.h>],
567 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
571 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
572 if test x$glibcpp_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 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_3
588 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_3, [
589 AC_MSG_CHECKING([for $1 declaration])
590 if test x${glibcpp_cv_func_$1_use+set} != xset; then
591 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
594 AC_TRY_COMPILE([#include <stdlib.h>],
596 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
600 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
601 if test x$glibcpp_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 GLIBCPP_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
620 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
621 AC_MSG_CHECKING([for $1 declaration])
622 if test x${glibcpp_cv_func_$1_use+set} != xset; then
623 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
626 AC_TRY_COMPILE([#include <math.h>],
628 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
632 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
633 if test x$glibcpp_cv_func_$1_use = x"yes"; then
634 AC_MSG_CHECKING([for $1 linkage])
635 if test x${glibcpp_cv_func_$1_link+set} != xset; then
636 AC_CACHE_VAL(glibcpp_cv_func_$1_link, [
637 AC_TRY_LINK([#include <math.h>],
639 [glibcpp_cv_func_$1_link=yes], [glibcpp_cv_func_$1_link=no])
642 AC_MSG_RESULT($glibcpp_cv_func_$1_link)
643 if test x$glibcpp_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 GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
670 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT, [
671 dnl Test for builtin math functions.
672 dnl These are made in gcc/c-common.c
673 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
674 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
675 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
676 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
677 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
679 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
680 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrt)
681 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
683 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
684 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
685 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
687 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
688 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
689 GLIBCPP_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$dummyvar = x"yes"; then
699 AC_DEFINE(HAVE___BUILTIN_ABS)
700 AC_DEFINE(HAVE___BUILTIN_LABS)
701 AC_DEFINE(HAVE___BUILTIN_COS)
702 AC_DEFINE(HAVE___BUILTIN_COSF)
703 AC_DEFINE(HAVE___BUILTIN_COSL)
704 AC_DEFINE(HAVE___BUILTIN_FABS)
705 AC_DEFINE(HAVE___BUILTIN_FABSF)
706 AC_DEFINE(HAVE___BUILTIN_FABSL)
707 AC_DEFINE(HAVE___BUILTIN_SIN)
708 AC_DEFINE(HAVE___BUILTIN_SINF)
709 AC_DEFINE(HAVE___BUILTIN_SINL)
710 AC_DEFINE(HAVE___BUILTIN_SQRT)
711 AC_DEFINE(HAVE___BUILTIN_SQRTF)
712 AC_DEFINE(HAVE___BUILTIN_SQRTL)
717 dnl Check to see what the underlying c library is like
718 dnl These checks need to do two things:
719 dnl 1) make sure the name is declared when using the c++ compiler
720 dnl 2) make sure the name has "C" linkage
721 dnl This might seem like overkill but experience has shown that it's not...
723 dnl Define HAVE_STRTOLD if "strtold" is declared and links
724 dnl Define HAVE_STRTOF if "strtof" is declared and links
725 dnl Define HAVE_DRAND48 if "drand48" is declared and links
727 dnl GLIBCPP_CHECK_STDLIB_SUPPORT
728 AC_DEFUN(GLIBCPP_CHECK_STDLIB_SUPPORT, [
729 ac_test_CXXFLAGS="${CXXFLAGS+set}"
730 ac_save_CXXFLAGS="$CXXFLAGS"
731 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
733 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
734 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtof)
735 AC_CHECK_FUNCS(drand48)
737 CXXFLAGS="$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 GLIBCPP_CHECK_MATH_SUPPORT
750 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
751 ac_test_CXXFLAGS="${CXXFLAGS+set}"
752 ac_save_CXXFLAGS="$CXXFLAGS"
753 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
756 AC_CHECK_LIB(m, sin, libm="-lm")
760 dnl Check to see if certain C math functions exist.
761 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
762 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
763 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
764 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
765 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
766 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
767 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
768 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypot)
770 dnl Check to see if basic C math functions have float versions.
771 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
776 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
779 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expf)
780 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
781 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
782 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2f)
783 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
784 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
785 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
786 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypotf)
787 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
788 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
789 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
790 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
791 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
792 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
793 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
794 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
796 dnl Check to see if basic C math functions have long double versions.
797 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
802 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
805 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
806 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
807 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
808 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
809 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
810 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
811 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
812 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
813 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypotl)
814 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
815 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
816 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
817 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
818 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
819 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
820 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
821 GLIBCPP_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 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig,
831 _acosf _asinf _atanf \
833 _coshf _sinhf _tanhf)
834 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round,
838 dnl Check to see if basic C math functions have long double versions.
839 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig,
841 _acosl _asinl _atanl \
843 _coshl _sinhl _tanhl)
844 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round,
849 CXXFLAGS="$ac_save_CXXFLAGS"
854 dnl Check to see if there is native support for complex
856 dnl Don't compile bits in math/* if native support exits.
858 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "copysignl" is found.
860 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
861 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
862 dnl Check for complex versions of math functions of platform. This will
863 dnl always pass if libm is available, and fail if it isn't. If it is
864 dnl available, we assume we'll need it later, so add it to LIBS.
865 AC_CHECK_LIB(m, main)
866 AC_REPLACE_MATHFUNCS(nan copysignf)
868 dnl For __signbit to signbit conversions.
869 AC_CHECK_FUNCS([__signbit], , [LIBMATHOBJS="$LIBMATHOBJS signbit.lo"])
870 AC_CHECK_FUNCS([__signbitf], , [LIBMATHOBJS="$LIBMATHOBJS signbitf.lo"])
872 dnl Compile the long double complex functions only if the function
873 dnl provides the non-complex long double functions that are needed.
874 dnl Currently this includes copysignl, which should be
875 dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
876 if test x$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 GLIBCPP_CHECK_HOST
892 AC_DEFUN(GLIBCPP_CHECK_HOST, [
893 . [$]{glibcpp_basedir}/configure.host
894 AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
895 AC_MSG_RESULT(OS config directory is $os_include_dir)
900 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
901 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
902 dnl must have been previously checked.)
904 dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found
905 dnl Define HAVE_MBSTATE_T if mbstate_t is not in wchar.h
907 dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT
908 AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [
909 dnl Wide characters disabled by default.
911 dnl Test wchar.h for mbstate_t, which is needed for char_traits and
912 dnl others even if wchar_t support is not on.
913 AC_MSG_CHECKING([for mbstate_t])
914 AC_TRY_COMPILE([#include <wchar.h>],
915 [mbstate_t teststate;],
916 have_mbstate_t=yes, have_mbstate_t=no)
917 AC_MSG_RESULT($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"$ac_XPG2_wchar_t" = xyes; then
1002 AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
1006 AC_MSG_CHECKING([for enabled wchar_t specializations])
1007 AC_MSG_RESULT($enable_wchar_t)
1012 dnl Check to see if debugging libraries are to be built.
1014 dnl GLIBCPP_ENABLE_DEBUG
1017 dnl builds a separate set of debugging libraries in addition to the
1018 dnl normal (shared, static) libstdc++ binaries.
1021 dnl builds only one (non-debug) version of libstdc++.
1023 dnl --enable-debug-flags=FLAGS
1024 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1026 dnl + Usage: GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
1027 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1028 dnl defaults to `no'.
1029 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
1030 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
1031 AC_ARG_ENABLE(debug,
1032 changequote(<<, >>)dnl
1033 << --enable-debug build extra debug library [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
1034 changequote([, ])dnl
1035 [case "${enableval}" in
1036 yes) enable_debug=yes ;;
1037 no) enable_debug=no ;;
1038 *) AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
1040 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
1041 AC_MSG_CHECKING([for additional debug build])
1042 AC_MSG_RESULT($enable_debug)
1043 AM_CONDITIONAL(GLIBCPP_BUILD_DEBUG, test "$enable_debug" = yes)
1047 dnl Check for explicit debug flags.
1049 dnl GLIBCPP_ENABLE_DEBUG_FLAGS
1051 dnl --enable-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-debug-flags does nothing.
1056 dnl + Usage: GLIBCPP_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(GLIBCPP_ENABLE_DEBUG_FLAGS, [dnl
1060 define([GLIBCPP_ENABLE_DEBUG_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
1061 AC_ARG_ENABLE(debug_flags,
1062 changequote(<<, >>)dnl
1063 << --enable-debug-flags=FLAGS pass compiler FLAGS when building debug
1064 library;[default=>>GLIBCPP_ENABLE_DEBUG_FLAGS_DEFAULT],
1065 changequote([, ])dnl
1066 [case "${enableval}" in
1068 -*) enable_debug_flags="${enableval}" ;;
1069 *) AC_MSG_ERROR([Unknown argument to extra debugging flags]) ;;
1071 enable_debug_flags=GLIBCPP_ENABLE_DEBUG_FLAGS_DEFAULT)dnl
1073 dnl Option parsed, now set things appropriately
1074 case x"$enable_debug" in
1076 case "$enable_debug_flags" in
1078 DEBUG_FLAGS="-g3 -O0";;
1080 DEBUG_FLAGS="${enableval}"
1087 AC_SUBST(DEBUG_FLAGS)
1089 AC_MSG_CHECKING([for debug build flags])
1090 AC_MSG_RESULT($DEBUG_FLAGS)
1095 dnl Check for "unusual" flags to pass to the compiler while building.
1097 dnl GLIBCPP_ENABLE_CXX_FLAGS
1098 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1099 dnl experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
1100 dnl Somehow this same set of flags must be passed when [re]building
1102 dnl --disable-cxx-flags passes nothing.
1103 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1104 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1105 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1106 dnl + Usage: GLIBCPP_ENABLE_CXX_FLAGS(default flags)
1107 dnl If "default flags" is an empty string (or "none"), the effect is
1108 dnl the same as --disable or --enable=no.
1109 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
1110 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
1111 AC_MSG_CHECKING([for extra compiler flags for building])
1112 AC_ARG_ENABLE(cxx_flags,
1113 changequote(<<, >>)dnl
1114 << --enable-cxx-flags=FLAGS pass compiler FLAGS when building library;
1115 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
1116 changequote([, ])dnl
1117 [case "x$enable_cxx_flags" in
1119 AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
1121 enable_cxx_flags='' ;;
1123 enable_cxx_flags="$enableval" ;;
1125 enable_cxx_flags=GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT)
1127 dnl Run through flags (either default or command-line) and set anything
1128 dnl extra (e.g., #defines) that must accompany particular g++ options.
1129 if test -n "$enable_cxx_flags"; then
1130 for f in $enable_cxx_flags; do
1134 *) # and we're trying to pass /what/ exactly?
1135 AC_MSG_ERROR([compiler flags start with a -]) ;;
1139 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1140 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1141 AC_SUBST(EXTRA_CXX_FLAGS)
1146 dnl Check for which locale library to use: gnu or generic.
1148 dnl GLIBCPP_ENABLE_CLOCALE
1149 dnl --enable-clocale=gnu sets config/locale/c_locale_gnu.cc and friends
1150 dnl --enable-clocale=generic sets config/locale/c_locale_generic.cc and friends
1152 dnl default is generic
1154 AC_DEFUN(GLIBCPP_ENABLE_CLOCALE, [
1155 AC_MSG_CHECKING([for clocale to use])
1156 AC_ARG_ENABLE(clocale,
1157 [ --enable-clocale enable model for target locale package.
1158 --enable-clocale=MODEL use MODEL target-speific locale package. [default=generic]
1160 if test x$enable_clocale = xno; then
1165 enable_clocale_flag=$enable_clocale
1167 dnl Probe for locale support if no specific model is specified.
1168 dnl Default to "generic"
1169 if test x$enable_clocale_flag = xno; then
1170 case x${target_os} in
1172 AC_EGREP_CPP([_GLIBCPP_ok], [
1173 #include <features.h>
1174 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1177 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1179 # Test for bugs early in glibc-2.2.x series
1180 if test x$enable_clocale_flag = xgnu; then
1182 #define _GNU_SOURCE 1
1185 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1186 extern __typeof(newlocale) __newlocale;
1187 extern __typeof(duplocale) __duplocale;
1188 extern __typeof(strcoll_l) __strcoll_l;
1192 const char __one[] = "Äuglein Augmen";
1193 const char __two[] = "Äuglein";
1198 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1199 loc_dup = __duplocale(loc);
1200 i = __strcoll_l(__one, __two, loc);
1201 j = __strcoll_l(__one, __two, loc_dup);
1205 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1206 [enable_clocale_flag=generic])
1209 # ... at some point put __strxfrm_l tests in as well.
1212 enable_clocale_flag=generic
1217 dnl Deal with gettext issues.
1219 [ --enable-nls use Native Language Support (default)],
1223 dnl Set configure bits for specified locale package
1224 case x${enable_clocale_flag} in
1226 AC_MSG_RESULT(generic)
1228 CLOCALE_H=config/locale/generic/c_locale.h
1229 CLOCALE_CC=config/locale/generic/c_locale.cc
1230 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1231 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1232 CCOLLATE_CC=config/locale/generic/collate_members.cc
1233 CCTYPE_CC=config/locale/generic/ctype_members.cc
1234 CMESSAGES_H=config/locale/generic/messages_members.h
1235 CMESSAGES_CC=config/locale/generic/messages_members.cc
1236 CMONEY_CC=config/locale/generic/monetary_members.cc
1237 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1238 CTIME_H=config/locale/generic/time_members.h
1239 CTIME_CC=config/locale/generic/time_members.cc
1240 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1245 # Declare intention to use gettext, and add support for specific
1247 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1250 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1251 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1252 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1255 # Export the build objects.
1256 for ling in $ALL_LINGUAS; do \
1257 glibcpp_MOFILES="$glibcpp_MOFILES $ling.mo"; \
1258 glibcpp_POFILES="$glibcpp_POFILES $ling.po"; \
1260 AC_SUBST(glibcpp_MOFILES)
1261 AC_SUBST(glibcpp_POFILES)
1263 CLOCALE_H=config/locale/gnu/c_locale.h
1264 CLOCALE_CC=config/locale/gnu/c_locale.cc
1265 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1266 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1267 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1268 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1269 CMESSAGES_H=config/locale/gnu/messages_members.h
1270 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1271 CMONEY_CC=config/locale/gnu/monetary_members.cc
1272 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1273 CTIME_H=config/locale/gnu/time_members.h
1274 CTIME_CC=config/locale/gnu/time_members.cc
1275 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1278 AC_MSG_RESULT(IEEE 1003.1)
1280 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1281 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1282 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1283 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1284 CCOLLATE_CC=config/locale/generic/collate_members.cc
1285 CCTYPE_CC=config/locale/generic/ctype_members.cc
1286 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1287 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1288 CMONEY_CC=config/locale/generic/monetary_members.cc
1289 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1290 CTIME_H=config/locale/generic/time_members.h
1291 CTIME_CC=config/locale/generic/time_members.cc
1292 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1295 echo "$enable_clocale is an unknown locale package" 1>&2
1300 # This is where the testsuite looks for locale catalogs, using the
1301 # -DLOCALEDIR define during testsuite compilation.
1302 glibcpp_localedir=${glibcpp_builddir}/po/share/locale
1303 AC_SUBST(glibcpp_localedir)
1305 # A standalone libintl (e.g., GNU libintl) may be in use.
1306 if test $USE_NLS = yes; then
1307 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1308 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1310 if test $USE_NLS = yes; then
1311 AC_DEFINE(_GLIBCPP_USE_NLS)
1316 AC_SUBST(CCODECVT_H)
1317 AC_SUBST(CMESSAGES_H)
1318 AC_SUBST(CCODECVT_CC)
1319 AC_SUBST(CCOLLATE_CC)
1321 AC_SUBST(CMESSAGES_CC)
1323 AC_SUBST(CNUMERIC_CC)
1326 AC_SUBST(CLOCALE_CC)
1327 AC_SUBST(CLOCALE_INTERNAL_H)
1332 dnl Check for which I/O library to use: stdio, or something specific.
1334 dnl GLIBCPP_ENABLE_CSTDIO
1336 dnl default is stdio
1338 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1339 AC_MSG_CHECKING([for cstdio to use])
1340 AC_ARG_ENABLE(cstdio,
1341 [ --enable-cstdio enable stdio for target io package.
1342 --enable-cstdio=LIB use LIB target-speific io package. [default=stdio]
1344 if test x$enable_cstdio = xno; then
1347 enable_cstdio=stdio)
1349 enable_cstdio_flag=$enable_cstdio
1351 dnl Check if a valid I/O package
1352 case x${enable_cstdio_flag} in
1353 xstdio | x | xno | xnone | xyes)
1355 CSTDIO_H=config/io/c_io_stdio.h
1356 BASIC_FILE_H=config/io/basic_file_stdio.h
1357 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1358 AC_MSG_RESULT(stdio)
1361 echo "$enable_cstdio is an unknown io package" 1>&2
1366 AC_SUBST(BASIC_FILE_H)
1367 AC_SUBST(BASIC_FILE_CC)
1372 dnl Check to see if building and using a C++ precompiled header can be done.
1374 dnl GLIBCPP_ENABLE_PCH
1376 dnl --enable-pch=yes
1377 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1378 dnl may work, after some light-hearted attempts to puzzle out compiler
1379 dnl support, flip bits on in include/Makefile.am
1382 dnl turns off attempts to use or build stdc++.h.gch.
1384 AC_DEFUN(GLIBCPP_ENABLE_PCH, [dnl
1385 define([GLIBCPP_ENABLE_PCH_DEFAULT], ifelse($1,,, $1))dnl
1387 changequote(<<, >>)dnl
1388 << --enable-pch build pre-compiled libstdc++ includes [default=>>GLIBCPP_ENABLE_PCH_DEFAULT],
1389 changequote([, ])dnl
1390 [case "${enableval}" in
1391 yes) enable_pch=yes ;;
1392 no) enable_pch=no ;;
1393 *) AC_MSG_ERROR([Unknown argument to enable/disable PCH]) ;;
1395 enable_pch=GLIBCPP_ENABLE_PCH_DEFAULT)dnl
1397 if test x$enable_pch = xyes; then
1398 ac_test_CXXFLAGS="${CXXFLAGS+set}"
1399 ac_save_CXXFLAGS="$CXXFLAGS"
1400 CXXFLAGS='-Werror -Winvalid-pch -Wno-deprecated -x c++-header'
1402 AC_MSG_CHECKING([for compiler that seems to compile .gch files])
1403 if test x${glibcpp_pch_comp+set} != xset; then
1404 AC_CACHE_VAL(glibcpp_pch_comp, [
1407 AC_TRY_COMPILE([#include <math.h>
1410 [glibcpp_pch_comp=yes], [glibcpp_pch_comp=no])
1414 AC_MSG_RESULT([$glibcpp_pch_comp])
1416 CXXFLAGS="$ac_save_CXXFLAGS"
1419 if test x"$enable_pch" = xyes && test x"$glibcpp_pch_comp" = xno; then
1423 AC_MSG_CHECKING([for enabled PCH])
1424 AC_MSG_RESULT([$enable_pch])
1426 AM_CONDITIONAL(GLIBCPP_BUILD_PCH, test "$enable_pch" = yes)
1427 if test "$enable_pch" = yes; then
1428 glibcpp_PCHFLAGS="-include bits/stdc++.h"
1432 AC_SUBST(glibcpp_PCHFLAGS)
1436 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1437 dnl We must stage the required headers so that they will be installed
1438 dnl with the library (unlike libgcc, the STL implementation is provided
1439 dnl solely within headers). Since we must not inject random user-space
1440 dnl macro names into user-provided C++ code, we first stage into <file>-in
1441 dnl and process to <file> with an output command. The reason for a two-
1442 dnl stage process here is to correctly handle $srcdir!=$objdir without
1443 dnl having to write complex code (the sed commands to clean the macro
1444 dnl namespace are complex and fragile enough as it is). We must also
1445 dnl add a relative path so that -I- is supported properly.
1447 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1448 AC_MSG_CHECKING([for thread model used by GCC])
1449 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
1450 AC_MSG_RESULT([$target_thread_file])
1452 if test $target_thread_file != single; then
1453 AC_DEFINE(HAVE_GTHR_DEFAULT)
1454 AC_DEFINE(_GLIBCPP_SUPPORTS_WEAK, __GXX_WEAK__)
1457 glibcpp_thread_h=gthr-$target_thread_file.h
1458 AC_SUBST(glibcpp_thread_h)
1463 dnl Check for exception handling support. If an explicit enable/disable
1464 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1465 dnl target may or may not support call frame exceptions.
1467 dnl GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
1468 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1469 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1471 dnl Define _GLIBCPP_SJLJ_EXCEPTIONS if the compiler is configured for it.
1473 AC_DEFUN(GLIBCPP_ENABLE_SJLJ_EXCEPTIONS, [
1474 AC_MSG_CHECKING([for exception model to use])
1477 AC_ARG_ENABLE(sjlj-exceptions,
1478 [ --enable-sjlj-exceptions force use of builtin_setjmp for exceptions],
1480 [dnl Botheration. Now we've got to detect the exception model.
1481 dnl Link tests against libgcc.a are problematic since -- at least
1482 dnl as of this writing -- we've not been given proper -L bits for
1483 dnl single-tree newlib and libgloss.
1485 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
1486 dnl conftest files before we got a change to grep them first.
1487 cat > conftest.$ac_ext << EOF
1488 [#]line __oline__ "configure"
1497 old_CXXFLAGS="$CXXFLAGS"
1499 if AC_TRY_EVAL(ac_compile); then
1500 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1501 enable_sjlj_exceptions=yes
1502 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1503 enable_sjlj_exceptions=no
1506 CXXFLAGS="$old_CXXFLAGS"
1508 if test x$enable_sjlj_exceptions = xyes; then
1509 AC_DEFINE(_GLIBCPP_SJLJ_EXCEPTIONS, 1,
1510 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1511 ac_exception_model_name=sjlj
1512 elif test x$enable_sjlj_exceptions = xno; then
1513 ac_exception_model_name="call frame"
1515 AC_MSG_ERROR([unable to detect exception model])
1518 AC_MSG_RESULT($ac_exception_model_name)
1523 dnl Check for libunwind exception handling support. If enabled then
1524 dnl we assume that the _Unwind_* functions that make up the Unwind ABI
1525 dnl (_Unwind_RaiseException, _Unwind_Resume, etc.) are defined by
1526 dnl libunwind instead of libgcc and that libstdc++ has a dependency
1527 dnl on libunwind as well as libgcc.
1529 dnl GLIBCPP_ENABLE_LIBUNWIND_EXCEPTIONS
1530 dnl --enable-libunwind-exceptions forces the use of libunwind.
1531 dnl --disable-libunwind-exceptions assumes there is no libunwind.
1533 dnl Define _GLIBCPP_LIBUNWIND_EXCEPTIONS if requested.
1535 AC_DEFUN(GLIBCPP_ENABLE_LIBUNWIND_EXCEPTIONS, [
1536 AC_MSG_CHECKING([for use of libunwind])
1537 AC_ARG_ENABLE(libunwind-exceptions,
1538 [ --enable-libunwind-exceptions force use of libunwind for exceptions],
1539 use_libunwind_exceptions=$enableval,
1540 use_libunwind_exceptions=no)
1541 AC_MSG_RESULT($use_libunwind_exceptions)
1542 dnl Option parsed, now set things appropriately
1543 if test x"$use_libunwind_exceptions" = xyes; then
1544 LIBUNWIND_FLAG="-lunwind"
1548 AC_SUBST(LIBUNWIND_FLAG)
1552 dnl Check for ISO/IEC 9899:1999 "C99" support.
1554 dnl GLIBCPP_ENABLE_C99
1555 dnl --enable-c99 defines _GLIBCPP_USE_C99
1556 dnl --disable-c99 leaves _GLIBCPP_USE_C99 undefined
1557 dnl + Usage: GLIBCPP_ENABLE_C99[(DEFAULT)]
1558 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1559 dnl defaults to `no'.
1560 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
1562 dnl GLIBCPP_ENABLE_C99
1563 AC_DEFUN(GLIBCPP_ENABLE_C99, [dnl
1564 define([GLIBCPP_ENABLE_C99_DEFAULT], ifelse($1, yes, yes, no))dnl
1567 changequote(<<, >>)dnl
1568 <<--enable-c99 turns on 'ISO/IEC 9899:1999 support' [default=>>GLIBCPP_ENABLE_C99_DEFAULT],
1569 changequote([, ])dnl
1570 [case "$enableval" in
1571 yes) enable_c99=yes ;;
1572 no) enable_c99=no ;;
1573 *) AC_MSG_ERROR([Unknown argument to enable/disable C99]) ;;
1575 enable_c99=GLIBCPP_ENABLE_C99_DEFAULT)dnl
1580 # Check for the existence of <math.h> functions used if C99 is enabled.
1582 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
1583 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
1584 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
1585 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
1586 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
1587 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
1588 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
1589 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
1590 AC_TRY_COMPILE([#include <math.h>],
1591 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
1592 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
1593 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
1594 AC_TRY_COMPILE([#include <math.h>],
1595 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
1596 AC_TRY_COMPILE([#include <math.h>],
1597 [isunordered(0.0,0.0);],, [ac_c99_math=no])
1598 AC_MSG_RESULT($ac_c99_math)
1600 # Check for the existence in <stdio.h> of vscanf, et. al.
1602 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1603 AC_TRY_COMPILE([#include <stdio.h>],
1604 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
1605 AC_TRY_COMPILE([#include <stdio.h>
1607 void foo(char* fmt, ...)
1608 {va_list args; va_start(args, fmt);
1609 vfscanf(stderr, "%i", args);}],
1610 [],, [ac_c99_stdio=no])
1611 AC_TRY_COMPILE([#include <stdio.h>
1613 void foo(char* fmt, ...)
1614 {va_list args; va_start(args, fmt);
1615 vscanf("%i", args);}],
1616 [],, [ac_c99_stdio=no])
1617 AC_TRY_COMPILE([#include <stdio.h>
1619 void foo(char* fmt, ...)
1620 {va_list args; va_start(args, fmt);
1621 vsnprintf(fmt, 0, "%i", args);}],
1622 [],, [ac_c99_stdio=no])
1623 AC_TRY_COMPILE([#include <stdio.h>
1625 void foo(char* fmt, ...)
1626 {va_list args; va_start(args, fmt);
1627 vsscanf(fmt, "%i", args);}],
1628 [],, [ac_c99_stdio=no])
1629 AC_MSG_RESULT($ac_c99_stdio)
1631 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1633 AC_MSG_CHECKING([for lldiv_t declaration])
1634 AC_CACHE_VAL(ac_c99_lldiv_t, [
1635 AC_TRY_COMPILE([#include <stdlib.h>],
1637 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
1639 AC_MSG_RESULT($ac_c99_lldiv_t)
1641 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1642 AC_TRY_COMPILE([#include <stdlib.h>],
1643 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
1644 AC_TRY_COMPILE([#include <stdlib.h>],
1645 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
1646 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
1647 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
1648 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
1649 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
1650 if test x"$ac_c99_lldiv_t" = x"no"; then
1653 AC_MSG_RESULT($ac_c99_stdlib)
1655 # Check for the existence of <wchar.h> functions used if C99 is enabled.
1656 # XXX the wchar.h checks should be rolled into the general C99 bits.
1658 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
1659 AC_TRY_COMPILE([#include <wchar.h>],
1660 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
1661 AC_TRY_COMPILE([#include <wchar.h>],
1662 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
1663 AC_TRY_COMPILE([#include <wchar.h>],
1664 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
1665 AC_MSG_RESULT($ac_c99_wchar)
1667 AC_MSG_CHECKING([for enabled ISO C99 support])
1668 if test x"$ac_c99_math" = x"no" ||
1669 test x"$ac_c99_stdio" = x"no" ||
1670 test x"$ac_c99_stdlib" = x"no" ||
1671 test x"$ac_c99_wchar" = x"no"; then
1674 AC_MSG_RESULT($enable_c99)
1676 # Option parsed, now set things appropriately
1677 if test x"$enable_c99" = x"yes"; then
1678 AC_DEFINE(_GLIBCPP_USE_C99)
1686 dnl Check for template specializations for the 'long long' type extension.
1687 dnl The result determines only whether 'long long' I/O is enabled; things
1688 dnl like numeric_limits<> specializations are always available.
1690 dnl GLIBCPP_ENABLE_LONG_LONG
1691 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1692 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1693 dnl + Usage: GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1694 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1695 dnl defaults to `no'.
1696 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1698 dnl GLIBCPP_ENABLE_LONG_LONG
1699 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1700 define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1702 AC_ARG_ENABLE(long-long,
1703 changequote(<<, >>)dnl
1704 <<--enable-long-long turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1705 changequote([, ])dnl
1706 [case "$enableval" in
1707 yes) enable_long_long=yes ;;
1708 no) enable_long_long=no ;;
1709 *) AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1711 enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1716 AC_MSG_CHECKING([for enabled long long I/O support])
1717 # iostreams require strtoll, strtoull to compile
1718 AC_TRY_COMPILE([#include <stdlib.h>],
1719 [char* tmp; strtoll("gnu", &tmp, 10);],,[enable_long_long=no])
1720 AC_TRY_COMPILE([#include <stdlib.h>],
1721 [char* tmp; strtoull("gnu", &tmp, 10);],,[enable_long_long=no])
1723 # Option parsed, now set things appropriately
1724 if test x"$enable_long_long" = xyes; then
1725 AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1727 AC_MSG_RESULT($enable_long_long)
1734 dnl Check for what type of C headers to use.
1736 dnl GLIBCPP_ENABLE_CHEADERS
1737 dnl --enable-cheaders= [does stuff].
1738 dnl --disable-cheaders [does not do anything, really].
1739 dnl + Usage: GLIBCPP_ENABLE_CHEADERS[(DEFAULT)]
1740 dnl Where DEFAULT is either `c' or `c_std'.
1741 dnl If ommitted, it defaults to `c_std'.
1742 AC_DEFUN(GLIBCPP_ENABLE_CHEADERS, [dnl
1743 define([GLIBCPP_ENABLE_CHEADERS_DEFAULT], ifelse($1, c_std, c_std, c_std))dnl
1744 AC_MSG_CHECKING([for c header strategy to use])
1745 AC_ARG_ENABLE(cheaders,
1746 changequote(<<, >>)dnl
1747 << --enable-cheaders=MODEL construct "C" header files for g++ [default=>>GLIBCPP_ENABLE_CHEADERS_DEFAULT],
1749 [case "$enableval" in
1754 enable_cheaders=c_std
1756 *) AC_MSG_ERROR([Unknown argument to enable/disable "C" headers])
1759 enable_cheaders=GLIBCPP_ENABLE_CHEADERS_DEFAULT)
1760 AC_MSG_RESULT($enable_cheaders)
1762 dnl Option parsed, now set things appropriately
1763 case "$enable_cheaders" in
1765 C_INCLUDE_DIR='${glibcpp_srcdir}/include/c_std'
1768 C_INCLUDE_DIR='${glibcpp_srcdir}/include/c'
1772 AC_SUBST(C_INCLUDE_DIR)
1773 AM_CONDITIONAL(GLIBCPP_C_HEADERS_C, test "$enable_cheaders" = c)
1774 AM_CONDITIONAL(GLIBCPP_C_HEADERS_C_STD, test "$enable_cheaders" = c_std)
1775 AM_CONDITIONAL(GLIBCPP_C_HEADERS_COMPATIBILITY, test "$c_compatibility" = yes)
1780 dnl Check for wide character support. Has the same effect as the option
1781 dnl in gcc's configure, but in a form that autoconf can mess with.
1783 dnl GLIBCPP_ENABLE_C_MBCHAR
1784 dnl --enable-c-mbchar requests all the wchar_t stuff.
1785 dnl --disable-c-mbchar doesn't.
1786 dnl + Usage: GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1787 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1788 dnl defaults to `no'.
1789 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1790 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1791 AC_ARG_ENABLE(c-mbchar,
1792 changequote(<<, >>)dnl
1793 << --enable-c-mbchar enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1794 changequote([, ])dnl
1795 [case "$enableval" in
1796 yes) enable_c_mbchar=yes ;;
1797 no) enable_c_mbchar=no ;;
1798 *) AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1800 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1801 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1806 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1808 dnl TOPLEVEL_INCLUDES
1809 dnl LIBMATH_INCLUDES
1810 dnl LIBSUPCXX_INCLUDES
1812 dnl GLIBCPP_EXPORT_INCLUDES
1813 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1814 # Root level of the build directory include sources.
1815 GLIBCPP_INCLUDES="-I${glibcpp_builddir}/include/${target_alias} -I${glibcpp_builddir}/include"
1817 # Passed down for canadian crosses.
1818 if test x"$CANADIAN" = xyes; then
1819 TOPLEVEL_INCLUDES='-I$(includedir)'
1822 LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1824 LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1826 # Now, export this to all the little Makefiles....
1827 AC_SUBST(GLIBCPP_INCLUDES)
1828 AC_SUBST(TOPLEVEL_INCLUDES)
1829 AC_SUBST(LIBMATH_INCLUDES)
1830 AC_SUBST(LIBSUPCXX_INCLUDES)
1835 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1837 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1838 # Optimization flags that are probably a good idea for thrill-seekers. Just
1839 # uncomment the lines below and make, everything else is ready to go...
1840 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1842 AC_SUBST(OPTIMIZE_CXXFLAGS)
1844 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings'
1845 AC_SUBST(WARN_FLAGS)
1849 dnl GLIBCPP_EXPORT_INSTALL_INFO
1850 dnl calculates gxx_install_dir
1851 dnl exports glibcpp_toolexecdir
1852 dnl exports glibcpp_toolexeclibdir
1853 dnl exports glibcpp_prefixdir
1855 dnl Assumes cross_compiling bits already done, and with_cross_host in
1858 dnl GLIBCPP_EXPORT_INSTALL_INFO
1859 AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [
1860 # Assumes glibcpp_builddir, glibcpp_srcdir are alreay set up and
1861 # exported correctly in GLIBCPP_CONFIGURE.
1862 glibcpp_toolexecdir=no
1863 glibcpp_toolexeclibdir=no
1864 glibcpp_prefixdir=${prefix}
1866 # Process the option --with-gxx-include-dir=<path to include-files directory>
1867 AC_MSG_CHECKING([for --with-gxx-include-dir])
1868 AC_ARG_WITH(gxx-include-dir,
1869 [ --with-gxx-include-dir the installation directory for include files],
1870 [case "${withval}" in
1872 AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
1879 gxx_include_dir=${withval}
1881 esac], [gxx_include_dir=no])
1882 AC_MSG_RESULT($gxx_include_dir)
1884 # Process the option "--enable-version-specific-runtime-libs"
1885 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
1886 AC_ARG_ENABLE(version-specific-runtime-libs,
1887 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
1888 [case "$enableval" in
1889 yes) version_specific_libs=yes ;;
1890 no) version_specific_libs=no ;;
1891 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
1893 version_specific_libs=no)dnl
1894 # Option set, now we can test it.
1895 AC_MSG_RESULT($version_specific_libs)
1897 # Default case for install directory for include files.
1898 if test $version_specific_libs = no && test $gxx_include_dir = no; then
1899 gxx_include_dir='$(prefix)'/include/c++/${gcc_version}
1902 # Version-specific runtime libs processing.
1903 if test $version_specific_libs = yes; then
1904 # Need the gcc compiler version to know where to install libraries
1905 # and header files if --enable-version-specific-runtime-libs option
1907 if test x"$gxx_include_dir" = x"no"; then
1908 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/c++
1910 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1911 glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)'
1914 # Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir
1915 # Install a library built with a cross compiler in tooldir, not libdir.
1916 if test x"$glibcpp_toolexecdir" = x"no"; then
1917 if test -n "$with_cross_host" &&
1918 test x"$with_cross_host" != x"no"; then
1919 glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)'
1920 glibcpp_toolexeclibdir='$(toolexecdir)/lib'
1922 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1923 glibcpp_toolexeclibdir='$(libdir)'
1925 multi_os_directory=`$CC -print-multi-os-directory`
1926 case $multi_os_directory in
1927 .) ;; # Avoid trailing /.
1928 *) glibcpp_toolexeclibdir=$glibcpp_toolexeclibdir/$multi_os_directory ;;
1932 AC_MSG_CHECKING([for install location])
1933 AC_MSG_RESULT($gxx_include_dir)
1935 AC_SUBST(glibcpp_prefixdir)
1936 AC_SUBST(gxx_include_dir)
1937 AC_SUBST(glibcpp_toolexecdir)
1938 AC_SUBST(glibcpp_toolexeclibdir)
1942 # Check for functions in math library.
1943 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1945 # This file can be copied and used freely without restrictions. It can
1946 # be used in projects which are not available under the GNU Public License
1947 # but which still want to provide support for the GNU gettext functionality.
1948 # Please note that the actual code is *not* freely available.
1952 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1953 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1954 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])])
1957 dnl This macro searches for a GNU version of make. If a match is found, the
1958 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1959 dnl set to "#". This is useful for including a special features in a Makefile,
1960 dnl which cannot be handled by other versions of make. The variable
1961 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1962 dnl the empty string otherwise.
1964 dnl Here is an example of its use:
1966 dnl Makefile.in might contain:
1968 dnl # A failsafe way of putting a dependency rule into a makefile
1970 dnl $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1972 dnl @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1973 dnl @ifGNUmake@ include $(DEPEND)
1974 dnl @ifGNUmake@ endif
1976 dnl Then configure.in would normally contain:
1978 dnl CHECK_GNU_MAKE()
1979 dnl AC_OUTPUT(Makefile)
1981 dnl Then perhaps to cause gnu make to override any other make, we could do
1982 dnl something like this (note that GNU make always looks for GNUmakefile first):
1984 dnl if ! test x$_cv_gnu_make_command = x ; then
1985 dnl mv Makefile GNUmakefile
1986 dnl echo .DEFAULT: > Makefile ;
1987 dnl echo \ $_cv_gnu_make_command \$@ >> Makefile;
1990 dnl Then, if any (well almost any) other make is called, and GNU make also
1991 dnl exists, then the other make wraps the GNU make.
1993 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1994 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1996 dnl #### Changes for libstdc++-v3: reformatting and linewrapping; prepending
1997 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1998 dnl #### conditional's subshell (" --version" is not a command), using a
1999 dnl #### different option to grep(1).
2001 dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not
2002 dnl #### ${MAKE:-make}).
2005 GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
2006 _cv_gnu_make_command='' ;
2007 dnl Search all the common names for GNU make
2008 for a in "${MAKE-make}" make gmake gnumake ; do
2009 if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
2011 _cv_gnu_make_command=$a ;
2016 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
2017 dnl string, '#' otherwise
2018 if test "x$_cv_gnu_make_command" != "x" ; then
2027 dnl Check for headers for, and arguments to, the setrlimit() function.
2028 dnl Used only in testsuite_hooks.h.
2029 AC_DEFUN(GLIBCPP_CHECK_SETRLIMIT_ancilliary, [
2030 AC_TRY_COMPILE([#include <unistd.h>
2031 #include <sys/time.h>
2032 #include <sys/resource.h>
2033 ], [ int f = RLIMIT_$1 ; ],
2034 [glibcpp_mresult=1], [glibcpp_mresult=0])
2035 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcpp_mresult,
2036 [Only used in build directory testsuite_hooks.h.])
2038 AC_DEFUN(GLIBCPP_CHECK_SETRLIMIT, [
2039 setrlimit_have_headers=yes
2040 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
2042 setrlimit_have_headers=no)
2043 # If don't have the headers, then we can't run the tests now, and we
2044 # won't be seeing any of these during testsuite compilation.
2045 if test $setrlimit_have_headers = yes; then
2046 # Can't do these in a loop, else the resulting syntax is wrong.
2047 GLIBCPP_CHECK_SETRLIMIT_ancilliary(DATA)
2048 GLIBCPP_CHECK_SETRLIMIT_ancilliary(RSS)
2049 GLIBCPP_CHECK_SETRLIMIT_ancilliary(VMEM)
2050 GLIBCPP_CHECK_SETRLIMIT_ancilliary(AS)
2052 # Check for rlimit, setrlimit.
2053 AC_CACHE_VAL(ac_setrlimit, [
2054 AC_TRY_COMPILE([#include <unistd.h>
2055 #include <sys/time.h>
2056 #include <sys/resource.h>
2058 [ struct rlimit r; setrlimit(0, &r);],
2059 [ac_setrlimit=yes], [ac_setrlimit=no])
2063 AC_MSG_CHECKING([for testsuite memory limit support])
2064 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
2066 AC_DEFINE(_GLIBCPP_MEM_LIMITS)
2070 AC_MSG_RESULT($ac_mem_limits)
2075 dnl Does any necessary configuration of the testsuite directory. Generates
2076 dnl the testsuite_hooks.h header.
2078 dnl GLIBCPP_CONFIGURE_TESTSUITE [no args]
2079 AC_DEFUN(GLIBCPP_CONFIGURE_TESTSUITE, [
2081 if test x"$GLIBCPP_IS_CROSS_COMPILING" = xfalse; then
2082 # Do checks for memory limit functions.
2083 GLIBCPP_CHECK_SETRLIMIT
2085 # Look for setenv, so that extended locale tests can be performed.
2086 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
2089 # Export file names for ABI checking.
2090 baseline_dir="${glibcpp_srcdir}/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
2091 AC_SUBST(baseline_dir)
2093 # Determine if checking the ABI is desirable.
2094 if test x$enable_symvers = xno; then
2099 enable_abi_check=no ;;
2101 enable_abi_check=yes ;;
2105 AM_CONDITIONAL(GLIBCPP_TEST_WCHAR_T, test "$enable_wchar_t" = yes)
2106 AM_CONDITIONAL(GLIBCPP_TEST_ABI, test "$enable_abi_check" = yes)
2110 sinclude(../libtool.m4)
2111 dnl The lines below arrange for aclocal not to bring an installed
2112 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
2113 dnl add a definition of LIBTOOL to Makefile.in.
2114 ifelse(,,,[AC_SUBST(LIBTOOL)
2115 AC_DEFUN([AM_PROG_LIBTOOL])
2116 AC_DEFUN([AC_LIBTOOL_DLOPEN])
2117 AC_DEFUN([AC_PROG_LD])
2121 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
2124 AC_DEFUN(GLIBCPP_CHECK_S_ISREG_OR_S_IFREG, [
2125 AC_CACHE_VAL(glibcpp_cv_S_ISREG, [
2126 AC_TRY_LINK([#include <sys/stat.h>],
2127 [struct stat buffer; fstat(0, &buffer); S_ISREG(buffer.st_mode); ],
2128 [glibcpp_cv_S_ISREG=yes],
2129 [glibcpp_cv_S_ISREG=no])
2131 AC_CACHE_VAL(glibcpp_cv_S_IFREG, [
2132 AC_TRY_LINK([#include <sys/stat.h>],
2133 [struct stat buffer; fstat(0, &buffer); S_IFREG & buffer.st_mode; ],
2134 [glibcpp_cv_S_IFREG=yes],
2135 [glibcpp_cv_S_IFREG=no])
2137 if test x$glibcpp_cv_S_ISREG = xyes; then
2138 AC_DEFINE(HAVE_S_ISREG)
2139 elif test x$glibcpp_cv_S_IFREG = xyes; then
2140 AC_DEFINE(HAVE_S_IFREG)
2145 dnl Check whether poll is available in <poll.h>.
2148 AC_DEFUN(GLIBCPP_CHECK_POLL, [
2149 AC_CACHE_VAL(glibcpp_cv_POLL, [
2150 AC_TRY_COMPILE([#include <poll.h>],
2151 [struct pollfd pfd[1]; pfd[0].events = POLLIN; poll(pfd, 1, 0); ],
2152 [glibcpp_cv_POLL=yes],
2153 [glibcpp_cv_POLL=no])
2155 if test x$glibcpp_cv_POLL = xyes; then
2156 AC_DEFINE(HAVE_POLL)
2160 # Check whether LC_MESSAGES is available in <locale.h>.
2161 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2163 # This file file be copied and used freely without restrictions. It can
2164 # be used in projects which are not available under the GNU Public License
2165 # but which still want to provide support for the GNU gettext functionality.
2166 # Please note that the actual code is *not* freely available.
2170 AC_DEFUN(AC_LC_MESSAGES, [
2171 AC_CHECK_HEADER(locale.h, [
2172 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2173 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2174 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2175 if test $ac_cv_val_LC_MESSAGES = yes; then
2176 AC_DEFINE(HAVE_LC_MESSAGES)
2183 dnl Check for whether the Boost-derived checks should be turned on.
2185 dnl GLIBCPP_ENABLE_CONCEPT_CHECKS
2186 dnl --enable-concept-checks turns them on.
2187 dnl --disable-concept-checks leaves them off.
2188 dnl + Usage: GLIBCPP_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2189 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
2190 dnl defaults to `no'.
2191 AC_DEFUN(GLIBCPP_ENABLE_CONCEPT_CHECKS, [dnl
2192 define([GLIBCPP_ENABLE_CONCEPT_CHECKS_DEFAULT], ifelse($1, yes, yes, no))dnl
2193 AC_ARG_ENABLE(concept-checks,
2194 changequote(<<, >>)dnl
2195 << --enable-concept-checks use Boost-derived template checks [default=>>GLIBCPP_ENABLE_CONCEPT_CHECKS_DEFAULT],
2196 changequote([, ])dnl
2197 [case "$enableval" in
2198 yes) enable_concept_checks=yes ;;
2199 no) enable_concept_checks=no ;;
2200 *) AC_MSG_ERROR([Unknown argument to enable/disable concept checks]) ;;
2202 enable_concept_checks=GLIBCPP_ENABLE_CONCEPT_CHECKS_DEFAULT)dnl
2203 dnl Option parsed, now set things appropriately
2204 if test x"$enable_concept_checks" = xyes; then
2205 AC_DEFINE(_GLIBCPP_CONCEPT_CHECKS)
2211 dnl Add version tags to symbols in shared library (or not), additionally
2212 dnl marking other symbols as private/local (or not).
2214 dnl GLIBCPP_ENABLE_SYMVERS
2215 dnl --enable-symvers=style adds a version script to the linker call when
2216 dnl creating the shared library. The choice of version script is
2217 dnl controlled by 'style'.
2218 dnl --disable-symvers does not.
2219 dnl + Usage: GLIBCPP_ENABLE_SYMVERS[(DEFAULT)]
2220 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
2221 dnl defaults to `no'. Passing `yes' tries to choose a default style
2222 dnl based on linker characteristics. Passing 'no' disables versioning.
2223 AC_DEFUN(GLIBCPP_ENABLE_SYMVERS, [dnl
2224 define([GLIBCPP_ENABLE_SYMVERS_DEFAULT], ifelse($1, yes, yes, no))dnl
2225 AC_ARG_ENABLE(symvers,
2226 changequote(<<, >>)dnl
2227 << --enable-symvers=style enables symbol versioning of the shared library [default=>>GLIBCPP_ENABLE_SYMVERS_DEFAULT],
2228 changequote([, ])dnl
2229 [case "$enableval" in
2230 yes) enable_symvers=yes ;;
2231 no) enable_symvers=no ;;
2232 # other names here, just as sanity checks
2233 #gnu|sun|etcetera) enable_symvers=$enableval ;;
2234 gnu) enable_symvers=$enableval ;;
2235 *) AC_MSG_ERROR([Unknown argument to enable/disable symvers]) ;;
2237 enable_symvers=GLIBCPP_ENABLE_SYMVERS_DEFAULT)dnl
2239 # If we never went through the GLIBCPP_CHECK_LINKER_FEATURES macro, then we
2240 # don't know enough about $LD to do tricks...
2241 if test x$enable_shared = xno ||
2243 test x$glibcpp_gnu_ld_version = x; then
2247 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2248 if test $enable_symvers != no; then
2249 AC_MSG_CHECKING([for shared libgcc])
2250 ac_save_CFLAGS="$CFLAGS"
2252 AC_TRY_LINK(, [return 0], glibcpp_shared_libgcc=yes, glibcpp_shared_libgcc=no)
2253 CFLAGS="$ac_save_CFLAGS"
2254 AC_MSG_RESULT($glibcpp_shared_libgcc)
2257 # For GNU ld, we need at least this version. It's 2.12 in the same format
2258 # as the tested-for version. See GLIBCPP_CHECK_LINKER_FEATURES for more.
2259 glibcpp_min_gnu_ld_version=21200
2261 # Check to see if unspecified "yes" value can win, given results
2263 if test $enable_symvers = yes ; then
2264 if test $with_gnu_ld = yes &&
2265 test $glibcpp_shared_libgcc = yes ;
2267 if test $glibcpp_gnu_ld_version -ge $glibcpp_min_gnu_ld_version ; then
2270 ac_test_CFLAGS="${CFLAGS+set}"
2271 ac_save_CFLAGS="$CFLAGS"
2272 CFLAGS='-shared -Wl,--version-script,conftest.map'
2275 echo 'FOO { global: f[a-z]o; local: *; };' > conftest.map
2277 AC_TRY_LINK([int foo;],, enable_symvers=gnu)
2278 if test "$ac_test_CFLAGS" = set; then
2279 CFLAGS="$ac_save_CFLAGS"
2281 # this is the suspicious part
2292 dnl Everything parsed; figure out what file to use.
2293 case $enable_symvers in
2295 SYMVER_MAP=config/linker-map.dummy
2298 SYMVER_MAP=config/linker-map.gnu
2299 AC_DEFINE(_GLIBCPP_SYMVER)
2303 AC_SUBST(SYMVER_MAP)
2304 AM_CONDITIONAL(GLIBCPP_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
2305 AC_MSG_CHECKING([versioning on shared library symbols])
2306 AC_MSG_RESULT($enable_symvers)