2 dnl Initialize configure bits.
4 dnl Define OPTLEVEL='-O2' if new inlining code present.
7 AC_DEFUN(GLIBCPP_CONFIGURE, [
8 dnl Default to --enable-multilib
9 AC_ARG_ENABLE(multilib,
10 [ --enable-multilib build hella library versions (default)],
11 [case "${enableval}" in
14 *) AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
15 esac], [multilib=yes])dnl
17 glibcpp_basedir=$auxdir/$1/libstdc++-v3
18 AC_SUBST(glibcpp_basedir)
20 AM_INIT_AUTOMAKE(libstdc++, 2.92)
22 # Never versions of autoconf add an underscore to these functions.
23 # Prevent future problems ...
24 ifdef([AC_PROG_CC_G],[],[define([AC_PROG_CC_G],defn([_AC_PROG_CC_G]))])
25 ifdef([AC_PROG_CC_GNU],[],[define([AC_PROG_CC_GNU],defn([_AC_PROG_CC_GNU]))])
26 ifdef([AC_PROG_CXX_G],[],[define([AC_PROG_CXX_G],defn([_AC_PROG_CXX_G]))])
27 ifdef([AC_PROG_CXX_GNU],[],[define([AC_PROG_CXX_GNU],defn([_AC_PROG_CXX_GNU]))])
31 # FIXME: We temporarily define our own version of AC_PROG_CC. This is
32 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS. We
33 # are probably using a cross compiler, which will not be able to fully
34 # link an executable. This should really be fixed in autoconf
37 AC_DEFUN(LIB_AC_PROG_CC,
38 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
39 dnl Fool anybody using AC_PROG_CC.
40 AC_PROVIDE([AC_PROG_CC])
41 AC_CHECK_PROG(CC, gcc, gcc)
42 if test -z "$CC"; then
43 AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
44 test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
49 if test $ac_cv_prog_gcc = yes; then
51 dnl Check whether -g works, even if CFLAGS is set, in case the package
52 dnl plays around with CFLAGS (such as to build both debugging and
53 dnl normal versions of a library), tasteless as that idea is.
54 ac_test_CFLAGS="${CFLAGS+set}"
55 ac_save_CFLAGS="$CFLAGS"
58 if test "$ac_test_CFLAGS" = set; then
59 CFLAGS="$ac_save_CFLAGS"
60 elif test $ac_cv_prog_cc_g = yes; then
67 test "${CFLAGS+set}" = set || CFLAGS="-g"
73 # Can't just call these here as g++ requires libstc++ to be built....
76 # Likewise for AC_PROG_CXX.
77 AC_DEFUN(LIB_AC_PROG_CXX,
78 [AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
79 dnl Fool anybody using AC_PROG_CXX.
80 AC_PROVIDE([AC_PROG_CXX])
81 # Use glibcpp_CXX so that we do not cause CXX to be cached with the
82 # flags that come in CXX while configuring libstdc++. They're different
83 # from those used for all other target libraries. If CXX is set in
84 # the environment, respect that here.
86 AC_CHECK_PROGS(glibcpp_CXX, $CCC c++ g++ gcc CC cxx cc++, gcc)
89 test -z "$glibcpp_CXX" && AC_MSG_ERROR([no acceptable c++ found in \$PATH])
93 if test $ac_cv_prog_gxx = yes; then
95 dnl Check whether -g works, even if CXXFLAGS is set, in case the package
96 dnl plays around with CXXFLAGS (such as to build both debugging and
97 dnl normal versions of a library), tasteless as that idea is.
98 ac_test_CXXFLAGS="${CXXFLAGS+set}"
99 ac_save_CXXFLAGS="$CXXFLAGS"
102 if test "$ac_test_CXXFLAGS" = set; then
103 CXXFLAGS="$ac_save_CXXFLAGS"
104 elif test $ac_cv_prog_cxx_g = yes; then
111 test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
117 AC_CHECK_TOOL(AS, as)
118 AC_CHECK_TOOL(AR, ar)
119 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
124 # We need AC_EXEEXT to keep automake happy in cygnus mode. However,
125 # at least currently, we never actually build a program, so we never
126 # need to use $(EXEEXT). Moreover, the test for EXEEXT normally
127 # fails, because we are probably configuring with a cross compiler
128 # which cant create executables. So we include AC_EXEEXT to keep
129 # automake happy, but we dont execute it, since we dont care about
135 . [$]{glibcpp_basedir}/configure.host
137 case [$]{glibcpp_basedir} in
138 /* | [A-Za-z]:[\\/]*) libgcj_flagbasedir=[$]{glibcpp_basedir} ;;
139 *) glibcpp_flagbasedir='[$](top_builddir)/'[$]{glibcpp_basedir} ;;
142 # This does for the target what configure.host does for the host. In
143 # addition to possibly modifying the same flags, it also sets up symlinks.
149 dnl Check to see if g++ can compile this library, and if so, if any version-
150 dnl specific precautions need to be taken.
152 dnl GLIBCPP_CHECK_COMPILER_VERSION
153 AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [
154 if test ! -f stamp-sanity-compiler; then
155 AC_MSG_CHECKING([for g++ that will successfully compile libstdc++-v3])
162 ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to GCC 3.0 or above]))
164 AC_MSG_RESULT($gpp_satisfactory)
165 touch stamp-sanity-compiler
171 dnl Test for newer compiler features, or features that are present in newer
172 dnl compiler version but not older compiler versions should be placed
175 dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the
176 dnl new inlining code or the new system_header pragma will die on -Werror.
177 dnl Leave it out by default and use maint-mode to use it.
179 dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if
180 dnl compiler supports it and the user has not requested debug mode.
182 dnl GLIBCPP_CHECK_COMPILER_FEATURES
183 AC_DEFUN(GLIBCPP_CHECK_COMPILER_FEATURES, [
184 # All these tests are for C++; save the language and the compiler flags.
185 # The CXXFLAGS thing is suspicious, but based on similar bits
186 # found in GLIBCPP_CONFIGURE.
189 ac_test_CXXFLAGS="${CXXFLAGS+set}"
190 ac_save_CXXFLAGS="$CXXFLAGS"
192 # Check for maintainer-mode bits.
193 if test x"$USE_MAINTAINER_MODE" = xno; then
199 # Check for -ffunction-sections -fdata-sections
200 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
201 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
202 AC_TRY_COMPILE(, [int foo;
203 ], [ac_fdsections=yes], [ac_fdsections=no])
204 if test "$ac_test_CXXFLAGS" = set; then
205 CXXFLAGS="$ac_save_CXXFLAGS"
207 # this is the suspicious part
210 if test x"$ac_fdsections" = x"yes" && test x"$enable_debug" = x"no"; then
211 SECTION_FLAGS='-ffunction-sections -fdata-sections'
213 AC_MSG_RESULT($ac_fdsections)
217 AC_SUBST(SECTION_FLAGS)
222 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
223 dnl the native linker is in use, all variables will be defined to something
224 dnl safe (like an empty string).
226 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
227 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
229 dnl GLIBCPP_CHECK_LINKER_FEATURES
230 AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [
231 # If we're not using GNU ld, then there's no point in even trying these
232 # tests. Check for that first. We should have already tested for gld
233 # by now (in libtool), but require it now just to be safe...
236 AC_REQUIRE([AC_PROG_LD])
239 if test "$ac_cv_prog_gnu_ld" = "notbroken"; then
240 # GNU ld it is! Joy and bunny rabbits!
242 # All these tests are for C++; save the language and the compiler flags.
243 # Need to do this so that g++ won't try to link in libstdc++
244 ac_test_CFLAGS="${CFLAGS+set}"
245 ac_save_CFLAGS="$CFLAGS"
246 CFLAGS='-x c++ -Wl,--gc-sections'
248 # Check for -Wl,--gc-sections
249 # XXX This test is broken at the moment, as symbols required for
250 # linking are now in libsupc++ (not built yet.....). In addition,
251 # this test has cored on solaris in the past. In addition,
252 # --gc-sections doesn't really work at the moment (keeps on discarding
253 # used sections, first .eh_frame and now some of the glibc sections for
254 # iconv). Bzzzzt. Thanks for playing, maybe next time.
255 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
263 ], [ac_sectionLDflags=yes],[ac_sectionLFflags=no], [ac_sectionLDflags=yes])
264 if test "$ac_test_CFLAGS" = set; then
265 CFLAGS="$ac_save_CFLAGS"
267 # this is the suspicious part
270 if test "$ac_sectionLDflags" = "yes"; then
271 SECTION_LDFLAGS='-Wl,--gc-sections'
273 AC_MSG_RESULT($ac_sectionLDflags)
276 # Set linker optimization flags.
277 if test x"$ac_cv_prog_gnu_ld" = x"yes" && test x"$enable_debug" = x"no"; then
278 OPT_LDFLAGS='-Wl,-O1'
281 AC_SUBST(SECTION_LDFLAGS)
282 AC_SUBST(OPT_LDFLAGS)
287 dnl Check to see if the (math function) argument passed is
288 dnl declared when using the c++ compiler
289 dnl ASSUMES argument is a math function with ONE parameter
291 dnl GLIBCPP_CHECK_MATH_DECL_1
292 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_1, [
293 AC_MSG_CHECKING([for $1 declaration])
294 if test x${glibcpp_cv_func_$1_use+set} != xset; then
295 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
298 AC_TRY_COMPILE([#include <math.h>
304 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
308 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
312 dnl Check to see if the (math function) argument passed is
313 dnl 1) declared when using the c++ compiler
314 dnl 2) has "C" linkage
315 dnl 3) if not, see if 1) and 2) for argument prepended with '_'
317 dnl Define HAVE_CARGF etc if "cargf" is declared and links
319 dnl argument 1 is name of function to check
321 dnl ASSUMES argument is a math function with ONE parameter
323 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1
324 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, [
325 GLIBCPP_CHECK_MATH_DECL_1($1)
326 if test x$glibcpp_cv_func_$1_use = x"yes"; then
329 GLIBCPP_CHECK_MATH_DECL_1(_$1)
330 if test x$glibcpp_cv_func__$1_use = x"yes"; then
338 dnl Like GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, but does a bunch of
339 dnl of functions at once. It's an all-or-nothing check -- either
340 dnl HAVE_XYZ is defined for each of the functions, or for none of them.
341 dnl Doing it this way saves significant configure time.
342 AC_DEFUN(GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1, [
343 AC_MSG_CHECKING([for $1 functions])
344 AC_CACHE_VAL(glibcpp_cv_func_$2_use, [
347 AC_TRY_COMPILE([#include <math.h>],
348 [ `for x in $3; do echo "$x (0);"; done` ],
349 [glibcpp_cv_func_$2_use=yes],
350 [glibcpp_cv_func_$2_use=no])
352 AC_MSG_RESULT($glibcpp_cv_func_$2_use)
353 if test x$glibcpp_cv_func_$2_use = x"yes"; then
359 dnl Check to see if the (math function) argument passed is
360 dnl declared when using the c++ compiler
361 dnl ASSUMES argument is a math function with ONE parameter
363 dnl GLIBCPP_CHECK_MATH_DECL_2
364 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_2, [
365 AC_MSG_CHECKING([for $1 declaration])
366 if test x${glibcpp_cv_func_$1_use+set} != xset; then
367 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
370 AC_TRY_COMPILE([#include <math.h>],
372 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
376 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
380 dnl Check to see if the (math function) argument passed is
381 dnl 1) declared when using the c++ compiler
382 dnl 2) has "C" linkage
384 dnl Define HAVE_CARGF etc if "cargf" is declared and links
386 dnl argument 1 is name of function to check
388 dnl ASSUMES argument is a math function with TWO parameters
390 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2
391 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2, [
392 GLIBCPP_CHECK_MATH_DECL_2($1)
393 if test x$glibcpp_cv_func_$1_use = x"yes"; then
396 GLIBCPP_CHECK_MATH_DECL_2(_$1)
397 if test x$glibcpp_cv_func__$1_use = x"yes"; then
405 dnl Check to see if the (math function) argument passed is
406 dnl declared when using the c++ compiler
407 dnl ASSUMES argument is a math function with ONE parameter
409 dnl GLIBCPP_CHECK_MATH_DECL_3
410 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_3, [
411 AC_MSG_CHECKING([for $1 declaration])
412 if test x${glibcpp_cv_func_$1_use+set} != xset; then
413 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
416 AC_TRY_COMPILE([#include <math.h>],
418 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
422 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
426 dnl Check to see if the (math function) argument passed is
427 dnl 1) declared when using the c++ compiler
428 dnl 2) has "C" linkage
430 dnl Define HAVE_CARGF etc if "cargf" is declared and links
432 dnl argument 1 is name of function to check
434 dnl ASSUMES argument is a math function with THREE parameters
436 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3
437 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3, [
438 GLIBCPP_CHECK_MATH_DECL_3($1)
439 if test x$glibcpp_cv_func_$1_use = x"yes"; then
442 GLIBCPP_CHECK_MATH_DECL_3(_$1)
443 if test x$glibcpp_cv_func__$1_use = x"yes"; then
451 dnl Check to see if the (stdlib function) argument passed is
452 dnl 1) declared when using the c++ compiler
453 dnl 2) has "C" linkage
455 dnl argument 1 is name of function to check
457 dnl ASSUMES argument is a math function with TWO parameters
459 dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2
460 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
461 AC_MSG_CHECKING([for $1 declaration])
462 if test x${glibcpp_cv_func_$1_use+set} != xset; then
463 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
466 AC_TRY_COMPILE([#include <stdlib.h>],
468 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
472 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
473 if test x$glibcpp_cv_func_$1_use = x"yes"; then
480 dnl Because the builtins are picky picky picky about the arguments they take,
481 dnl do an explict linkage tests here.
482 dnl Check to see if the (math function) argument passed is
483 dnl 1) declared when using the c++ compiler
484 dnl 2) has "C" linkage
486 dnl Define HAVE_CARGF etc if "cargf" is declared and links
488 dnl argument 1 is name of function to check
490 dnl ASSUMES argument is a math function with ONE parameter
492 dnl GLIBCPP_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
493 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
494 AC_MSG_CHECKING([for $1 declaration])
495 if test x${glibcpp_cv_func_$1_use+set} != xset; then
496 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
499 AC_TRY_COMPILE([#include <math.h>],
501 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
505 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
506 if test x$glibcpp_cv_func_$1_use = x"yes"; then
507 AC_MSG_CHECKING([for $1 linkage])
508 if test x${glibcpp_cv_func_$1_link+set} != xset; then
509 AC_CACHE_VAL(glibcpp_cv_func_$1_link, [
510 AC_TRY_LINK([#include <math.h>],
512 [glibcpp_cv_func_$1_link=yes], [glibcpp_cv_func_$1_link=no])
515 AC_MSG_RESULT($glibcpp_cv_func_$1_link)
516 if test x$glibcpp_cv_func_$1_link = x"yes"; then
517 ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
518 AC_DEFINE_UNQUOTED(${ac_tr_func})
525 dnl Check to see what builtin math functions are supported
527 dnl check for __builtin_abs
528 dnl check for __builtin_fabsf
529 dnl check for __builtin_fabs
530 dnl check for __builtin_fabl
531 dnl check for __builtin_labs
532 dnl check for __builtin_sqrtf
533 dnl check for __builtin_sqrtl
534 dnl check for __builtin_fsqrt
535 dnl check for __builtin_sinf
536 dnl check for __builtin_sin
537 dnl check for __builtin_sinl
538 dnl check for __builtin_cosf
539 dnl check for __builtin_cos
540 dnl check for __builtin_cosl
542 dnl GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
543 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT, [
544 dnl Test for builtin math functions.
545 dnl These are made in gcc/c-common.c
546 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
547 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
548 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
549 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
550 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
552 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
553 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fsqrt)
554 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
556 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
557 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
558 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
560 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
561 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
562 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
564 dnl There is, without a doubt, a more elegant way to have these
565 dnl names exported so that they won't be stripped out of acconfig.h by
566 dnl autoheader. I leave this as an exercise to somebody less frustrated
567 dnl than I.... please email the libstdc++ list if you can figure out a
568 dnl more elegant approach (see autoconf/acgen.m4 and specifically
569 dnl AC_CHECK_FUNC for things to steal.)
571 if test x$dummyvar = x"yes"; then
572 AC_DEFINE(HAVE___BUILTIN_ABS)
573 AC_DEFINE(HAVE___BUILTIN_LABS)
574 AC_DEFINE(HAVE___BUILTIN_COS)
575 AC_DEFINE(HAVE___BUILTIN_COSF)
576 AC_DEFINE(HAVE___BUILTIN_COSL)
577 AC_DEFINE(HAVE___BUILTIN_FABS)
578 AC_DEFINE(HAVE___BUILTIN_FABSF)
579 AC_DEFINE(HAVE___BUILTIN_FABSL)
580 AC_DEFINE(HAVE___BUILTIN_SIN)
581 AC_DEFINE(HAVE___BUILTIN_SINF)
582 AC_DEFINE(HAVE___BUILTIN_SINL)
583 AC_DEFINE(HAVE___BUILTIN_FSQRT)
584 AC_DEFINE(HAVE___BUILTIN_SQRTF)
585 AC_DEFINE(HAVE___BUILTIN_SQRTL)
591 dnl Check to see what the underlying c library
592 dnl These checks need to do two things:
593 dnl 1) make sure the name is declared when using the c++ compiler
594 dnl 2) make sure the name has "C" linkage
595 dnl This might seem like overkill but experience has shown that it's not...
597 dnl Define HAVE_STRTOLD if "strtold" is declared and links
598 dnl Define HAVE_STRTOF if "strtof" is declared and links
599 dnl Define HAVE_DRAND48 if "drand48" is declared and links
601 dnl GLIBCPP_CHECK_STDLIB_SUPPORT
602 AC_DEFUN(GLIBCPP_CHECK_STDLIB_SUPPORT, [
603 ac_test_CXXFLAGS="${CXXFLAGS+set}"
604 ac_save_CXXFLAGS="$CXXFLAGS"
605 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
607 AC_CHECK_FUNCS(strtof)
608 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
609 AC_CHECK_FUNCS(drand48)
611 CXXFLAGS="$ac_save_CXXFLAGS"
616 dnl Check to see what the underlying c library or math library is like.
617 dnl These checks need to do two things:
618 dnl 1) make sure the name is declared when using the c++ compiler
619 dnl 2) make sure the name has "C" linkage
620 dnl This might seem like overkill but experience has shown that it's not...
622 dnl Define HAVE_CARGF etc if "cargf" is found.
624 dnl GLIBCPP_CHECK_MATH_SUPPORT
625 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
626 ac_test_CXXFLAGS="${CXXFLAGS+set}"
627 ac_save_CXXFLAGS="$CXXFLAGS"
628 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
631 AC_CHECK_LIB(m, sin, libm="-lm")
635 dnl Check to see if certain C math functions exist.
636 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
637 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
638 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
639 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
640 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
641 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
642 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
644 dnl Check to see if basic C math functions have float versions.
645 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
650 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
653 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
654 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
655 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
656 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
657 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
658 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
659 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
660 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
661 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
662 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
663 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
664 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
665 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
667 dnl Check to see if basic C math functions have long double versions.
668 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
673 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
676 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
677 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
678 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
679 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
680 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
681 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
682 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
683 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
684 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
685 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
686 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
687 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
688 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
689 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
690 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
691 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
693 dnl Some runtimes have these functions with a preceding underscore. Please
694 dnl keep this sync'd with the one above. And if you add any new symbol,
695 dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
696 dnl Check to see if certain C math functions exist.
698 dnl Check to see if basic C math functions have float versions.
699 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig,
701 _acosf _asinf _atanf \
703 _coshf _sinhf _tanhf)
704 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round,
708 dnl Check to see if basic C math functions have long double versions.
709 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig,
711 _acosl _asinl _atanl \
713 _coshl _sinhl _tanhl)
714 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round,
719 CXXFLAGS="$ac_save_CXXFLAGS"
724 dnl Check to see if there is native support for complex
726 dnl Don't compile bits in math/* if native support exits.
728 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "atan2l/copysignl" is found.
730 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
731 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
732 dnl Check for complex versions of math functions of platform.
733 AC_CHECK_LIB(m, main)
734 AC_REPLACE_MATHFUNCS(nan hypot hypotf atan2f expf copysignf)
736 dnl Compile the long double complex functions only if the function
737 dnl provides the non-complex long double functions that are needed.
738 dnl Currently this includes copysignl and atan2l, which should be
739 dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
740 USE_COMPLEX_LONG_DOUBLE=no
741 if test x$ac_cv_func_atan2l = x"yes" \
742 && test x$ac_cv_func_copysignl = x"yes"; then
743 USE_COMPLEX_LONG_DOUBLE=yes
744 AC_REPLACE_MATHFUNCS(hypotl signbitl)
747 AC_SUBST(USE_COMPLEX_LONG_DOUBLE)
751 dnl Check to see what architecture and operating system we are compiling
752 dnl for. Also, if architecture- or OS-specific flags are required for
753 dnl compilation, pick them up here.
755 dnl GLIBCPP_CHECK_TARGET
756 AC_DEFUN(GLIBCPP_CHECK_TARGET, [
757 . [$]{glibcpp_basedir}/configure.target
758 AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
759 AC_MSG_RESULT(OS config directory is $os_include_dir)
760 AC_LINK_FILES($os_include_dir/bits/os_defines.h, include/bits/os_defines.h)
765 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
766 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
767 dnl must have been previously checked.)
769 dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found
770 dnl Define HAVE_MBSTATE_T if mbstate_t is not in wchar.h
772 dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT
773 AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [
775 dnl Test wchar.h for mbstate_t, which is needed for char_traits and
776 dnl others even if wchar_t support is not on.
777 AC_MSG_CHECKING([for mbstate_t])
778 AC_TRY_COMPILE([#include <wchar.h>],
779 [mbstate_t teststate;],
780 have_mbstate_t=yes, have_mbstate_t=no)
781 AC_MSG_RESULT($have_mbstate_t)
782 if test x"$have_mbstate_t" = xyes; then
783 AC_DEFINE(HAVE_MBSTATE_T)
786 dnl Sanity check for existence of ISO C99 headers for extended encoding.
787 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
788 AC_CHECK_HEADER(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
790 dnl Only continue checking if the ISO C99 headers exist and support is on.
791 if test x"$ac_has_wchar_h" = xyes && test x"$ac_has_wctype_h" = xyes \
792 && test x"$enable_c_mbchar" != xno; then
794 dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
795 dnl numeric_limits can instantiate type_traits<wchar_t>
796 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
797 AC_TRY_COMPILE([#include <wchar.h>],
798 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
799 has_wchar_minmax=yes, has_wchar_minmax=no)
800 AC_MSG_RESULT($has_wchar_minmax)
802 dnl Test wchar.h for WEOF, which is what we use to determine whether
803 dnl to specialize for char_traits<wchar_t> or not.
804 AC_MSG_CHECKING([for WEOF])
807 #include <stddef.h>],
809 has_weof=yes, has_weof=no)
810 AC_MSG_RESULT($has_weof)
812 dnl Tests for wide character functions used in char_traits<wchar_t>.
813 AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset \
814 wcsrtombs mbsrtowcs, ac_wfuncs=yes, ac_wfuncs=no)
816 AC_MSG_CHECKING([for ISO C99 wchar_t support])
817 if test x"$has_weof" = xyes && test x"$has_wchar_minmax" = xyes \
818 && test x"$ac_wfuncs" = xyes; then
819 ac_isoC99_wchar_t=yes
823 AC_MSG_RESULT($ac_isoC99_wchar_t)
825 dnl Use iconv for wchar_t to char conversions. As such, check for
826 dnl X/Open Portability Guide, version 2 features (XPG2).
827 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
828 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
830 dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
831 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
833 LIBS="$LIBS $libiconv"
835 AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
836 ac_XPG2funcs=yes, ac_XPG2funcs=no)
840 AC_MSG_CHECKING([for XPG2 wchar_t support])
841 if test x"$ac_has_iconv_h" = xyes && test x"$ac_has_langinfo_h" = xyes \
842 && test x"$ac_XPG2funcs" = xyes; then
847 AC_MSG_RESULT($ac_XPG2_wchar_t)
849 dnl At the moment, only enable wchar_t specializations if all the
850 dnl above support is present.
851 AC_MSG_CHECKING([for enabled wchar_t specializations])
852 if test x"$ac_isoC99_wchar_t" = xyes \
853 && test x"$ac_XPG2_wchar_t" = xyes; then
854 AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
860 dnl Wide characters disabled by the user.
861 AC_MSG_WARN([wchar_t support disabled.])
867 dnl Check to see if this version of GNU C++ is afflicted by bugs in
868 dnl __complex__ float support.
870 dnl Define _GLIBCPP_BUGGY_FLOAT_COMPLEX if buggy.
872 dnl Check to see if this version of GNU C++ is afflicted by bugs in
873 dnl __complex__ support.Check for buggy __complex__ that will cause ICE in
874 dnl gcc-2.95.x when using the library, unless we define the default copy
875 dnl ctor in the specializations of complex<>.
877 dnl Define _GLIBCPP_BUGGY_COMPLEX if buggy.
878 dnl GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT
879 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT, [
880 AC_REQUIRE([AC_PROG_CXX])
882 AC_MSG_CHECKING([for GNU C++ __complex__ support])
883 AC_CACHE_VAL(glibcpp_cv_complex, [
886 AC_TRY_COMPILE([struct dcomplex { __complex__ double x; }; \
887 dcomplex f(const dcomplex& x) { return dcomplex(x); }], \
888 [ dcomplex x; f(x); ],
889 glibcpp_cv_complex=ok,
890 glibcpp_cv_complex=buggy
894 AC_MSG_RESULT($glibcpp_cv_complex)
895 if test $glibcpp_cv_complex = buggy; then
896 AC_DEFINE(_GLIBCPP_BUGGY_COMPLEX)
899 AC_MSG_CHECKING([for GNU C++ __complex__ float support])
900 AC_CACHE_VAL(glibcpp_cv_float_complex, [
904 cat > conftest.h <<EOB
906 // Check for buggy __complex__ that causes ICE in most versions of egcs
907 // and gcc-2.95.x on certain platforms (eg., x86-win32).
909 // See http://gcc.gnu.org/ml/gcc-bugs/1999-07n/msg00845.html for
910 // more info on the bug itself.
915 __complex__ float m_value;
916 float_complex (float = 0.0f, float = 0.0f);
917 float_complex (__complex__ float val) : m_value (val) {}
918 float_complex foo (const float_complex &val)
919 { return float_complex (~val.m_value); }
922 AC_TRY_COMPILE([#include "conftest.h"], ,
923 glibcpp_cv_float_complex=ok,
924 glibcpp_cv_float_complex=buggy
928 AC_MSG_RESULT($glibcpp_cv_float_complex)
929 if test $glibcpp_cv_float_complex = buggy; then
930 AC_DEFINE(_GLIBCPP_BUGGY_FLOAT_COMPLEX)
936 dnl Check for special debugging mode; not for production use.
938 dnl GLIBCPP_ENABLE_DEBUG
939 dnl --enable-debug sets '-ggdb3 -O0'.
940 dnl --disable-debug sets '-g' and whatever optimization options the
941 dnl compiler can handle.
942 dnl + --enable-maintainer-mode automatically defaults this to on.
943 dnl + Perhaps -D/-U of NDEBUG, DEBUG, DEBUG_ASSERT, ...?
944 dnl + Usage: GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
945 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
946 dnl defaults to `no'.
947 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
948 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
950 changequote(<<, >>)dnl
951 << --enable-debug extra debugging, turn off optimization [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
953 [case "${enableval}" in
954 yes) enable_debug=yes ;;
955 no) enable_debug=no ;;
956 *) AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
958 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
960 dnl Option parsed, now set things appropriately
961 case "${enable_debug}" in
963 DEBUG_FLAGS='-O0 -ggdb3'
969 AC_SUBST(DEBUG_FLAGS)
974 dnl Check for "unusual" flags to pass to the compiler while building.
976 dnl GLIBCPP_ENABLE_CXX_FLAGS
977 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
978 dnl experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
979 dnl Somehow this same set of flags must be passed when [re]building
981 dnl --disable-cxx-flags passes nothing.
982 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
983 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
984 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
985 dnl + Usage: GLIBCPP_ENABLE_CXX_FLAGS(default flags)
986 dnl If "default flags" is an empty string (or "none"), the effect is
987 dnl the same as --disable or --enable=no.
988 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
989 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
990 AC_ARG_ENABLE(cxx-flags,
991 changequote(<<, >>)dnl
992 << --enable-cxx-flags=FLAGS pass compiler FLAGS when building library;
993 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
995 [case "x$enableval" in
997 AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
999 enable_cxx_flags='' ;;
1001 enable_cxx_flags="$enableval" ;;
1003 enable_cxx_flags='GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT')
1005 dnl Thinko on my part during design. This kludge is the workaround.
1006 if test "$enable_cxx_flags" = "none"; then
1007 enable_cxx_flags='';
1010 dnl Run through flags (either default or command-line) and set anything
1011 dnl extra (e.g., #defines) that must accompany particular g++ options.
1012 if test -n "$enable_cxx_flags"; then
1013 for f in $enable_cxx_flags; do
1017 *) # and we're trying to pass /what/ exactly?
1018 AC_MSG_ERROR([compiler flags start with a -]) ;;
1022 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1023 AC_SUBST(EXTRA_CXX_FLAGS)
1028 dnl Check for which locale library to use: gnu or generic.
1030 dnl GLIBCPP_ENABLE_CLOCALE
1031 dnl --enable-clocale=gnu sets config/c_locale_gnu.cc and friends
1032 dnl --enable-clocale=generic sets config/c_locale_generic.cc and friends
1034 dnl default is generic
1036 AC_DEFUN(GLIBCPP_ENABLE_CLOCALE, [
1037 AC_MSG_CHECKING([for clocale to use])
1038 AC_ARG_ENABLE(clocale,
1039 [ --enable-clocale enable model for target locale package.
1040 --enable-clocale=MODEL use MODEL target-speific locale package. [default=generic]
1042 if test x$enable_clocale = xno; then
1043 enable_clocale=generic
1045 enable_clocale=generic)
1047 enable_clocale_flag=$enable_clocale
1049 dnl Check if a valid locale package
1050 case x${enable_clocale_flag} in
1052 CLOCALE_H=config/c_locale_gnu.h
1053 CLOCALE_CC=config/c_locale_gnu.cc
1057 CLOCALE_H=config/c_locale_generic.h
1058 CLOCALE_CC=config/c_locale_generic.cc
1059 AC_MSG_RESULT(generic)
1062 echo "$enable_clocale is an unknown locale package" 1>&2
1067 AC_LINK_FILES($CLOCALE_H, include/bits/c++locale.h)
1068 AC_LINK_FILES($CLOCALE_CC, src/c++locale.cc)
1073 dnl Check for which I/O library to use: libio, or something specific.
1075 dnl GLIBCPP_ENABLE_CSTDIO
1076 dnl --enable-cstdio=libio sets config/c_io_libio.h and friends
1078 dnl default is stdio
1080 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1081 AC_MSG_CHECKING([for cstdio to use])
1082 AC_ARG_ENABLE(cstdio,
1083 [ --enable-cstdio enable stdio for target io package.
1084 --enable-cstdio=LIB use LIB target-speific io package. [default=stdio]
1086 if test x$enable_cstdio = xno; then
1089 enable_cstdio=stdio)
1091 enable_cstdio_flag=$enable_cstdio
1093 dnl Check if a valid I/O package
1094 case x${enable_cstdio_flag} in
1096 CSTDIO_H=config/c_io_libio.h
1097 BASIC_FILE_H=config/basic_file_libio.h
1098 BASIC_FILE_CC=config/basic_file_libio.cc
1099 AC_MSG_RESULT(libio)
1101 # see if we are on a system with libio native (ie, linux)
1102 AC_CHECK_HEADER(libio.h, has_libio=yes, has_libio=no)
1104 # Need to check and see what version of glibc is being used. If
1105 # it's not glibc-2.2 or higher, then we'll need to go ahead and
1106 # compile most of libio for linux systems.
1107 if test x$has_libio = x"yes"; then
1110 AC_MSG_CHECKING([for glibc version >= 2.2])
1111 AC_EGREP_CPP([ok], [
1112 #include <features.h>
1113 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1116 ], glibc_satisfactory=yes, glibc_satisfactory=no)
1117 AC_MSG_RESULT($glibc_satisfactory)
1121 # XXX at the moment, admit defeat and force the recompilation
1122 # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1123 glibc_satisfactory=no
1125 if test x$glibc_satisfactory = x"yes"; then
1130 # bkoz XXX need to add checks to enable this
1131 # pme XXX here's a first pass at such a check
1132 if test x$enable_c_mbchar != xno; then
1140 # Using libio, but <libio.h> doesn't exist on the target system. . .
1142 # bkoz XXX need to add checks to enable this
1143 # pme XXX here's a first pass at such a check
1144 if test x$enable_c_mbchar != xno; then
1151 xstdio | x | xno | xnone | xyes)
1153 CSTDIO_H=config/c_io_stdio.h
1154 BASIC_FILE_H=config/basic_file_stdio.h
1155 BASIC_FILE_CC=config/basic_file_stdio.cc
1156 AC_MSG_RESULT(stdio)
1158 # We're not using stdio.
1163 echo "$enable_cstdio is an unknown io package" 1>&2
1167 AC_LINK_FILES($CSTDIO_H, include/bits/c++io.h)
1168 AC_LINK_FILES($BASIC_FILE_H, include/bits/basic_file_model.h)
1169 AC_LINK_FILES($BASIC_FILE_CC, src/basic_file.cc)
1171 # 2000-08-04 bkoz hack
1172 CCODECVT_C=config/c_io_libio_codecvt.c
1173 AC_LINK_FILES($CCODECVT_C, libio/c_codecvt.c)
1174 # 2000-08-04 bkoz hack
1176 AM_CONDITIONAL(GLIBCPP_BUILD_LIBIO,
1177 test "$need_libio" = yes || test "$need_wlibio" = yes)
1178 AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1179 AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1180 if test "$need_libio" = yes || test "$need_wlibio" = yes; then
1181 libio_la=../libio/libio.la
1190 dnl Check for which threading library to use.
1192 dnl GLIBCPP_ENABLE_THREADS
1193 dnl --enable-threads=posix sets config/threads-posix.h et. al.
1195 dnl Default is no threads, which also disables _IO_MTSAFE_IO in
1196 dnl libio. Any actual thread package will enable it.
1198 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1199 AC_MSG_CHECKING([for thread model used by GCC])
1200 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
1201 AC_MSG_RESULT([$target_thread_file])
1203 dnl Check for thread package actually supported in libstdc++
1205 case "$target_thread_file" in
1207 THREADH=threads-no.h
1210 THREADH=threads-posix.h
1212 decosf1 | irix | mach | os2 | solaris | win32 | dce | vxworks)
1213 AC_MSG_WARN(disabling unsupported thread package $target_thread_file)
1214 THREADH=threads-no.h
1217 AC_MSG_ERROR($target_thread_file: unsupported/unknown thread package)
1221 AC_LINK_FILES(config/$THREADH, include/bits/c++threads.h)
1222 if test $THREADH != threads-no.h; then
1223 AC_DEFINE(_GLIBCPP_USE_THREADS)
1229 dnl Check for exception handling support. If an explicit enable/disable
1230 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1231 dnl target may or may not support call frame exceptions.
1233 dnl GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
1234 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1235 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1237 dnl Define _GLIBCPP_SJLJ_EXCEPTIONS if the compiler is configured for it.
1239 AC_DEFUN(GLIBCPP_ENABLE_SJLJ_EXCEPTIONS, [
1240 AC_MSG_CHECKING([for exception model to use])
1243 AC_ARG_ENABLE(sjlj-exceptions,
1244 [ --enable-sjlj-exceptions force use of builtin_setjmp for exceptions],
1246 [dnl Botheration. Now we've got to detect the exception model.
1247 dnl Link tests against libgcc.a are problematic since -- at least
1248 dnl as of this writing -- we've not been given proper -L bits for
1249 dnl single-tree newlib and libgloss.
1251 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
1252 dnl conftest files before we got a change to grep them first.
1253 cat > conftest.$ac_ext << EOF
1254 [#]line __oline__ "configure"
1263 old_CXXFLAGS="$CXXFLAGS"
1265 if AC_TRY_EVAL(ac_compile); then
1266 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1267 enable_sjlj_exceptions=yes
1268 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1269 enable_sjlj_exceptions=no
1272 CXXFLAGS="$old_CXXFLAGS"
1274 if test x$enable_sjlj_exceptions = xyes; then
1275 AC_DEFINE(_GLIBCPP_SJLJ_EXCEPTIONS, 1,
1276 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1277 ac_exception_model_name=sjlj
1278 elif test x$enable_sjlj_exceptions = xno; then
1279 ac_exception_model_name="call frame"
1281 AC_MSG_ERROR([unable to detect exception model])
1284 AC_MSG_RESULT($ac_exception_model_name)
1289 dnl Check for ISO/IEC 9899:1999 "C99" support.
1291 dnl GLIBCPP_ENABLE_C99
1292 dnl --enable-c99 defines _GLIBCPP_USE_C99
1293 dnl --disable-c99 leaves _GLIBCPP_USE_C99 undefined
1294 dnl + Usage: GLIBCPP_ENABLE_C99[(DEFAULT)]
1295 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1296 dnl defaults to `no'.
1297 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
1299 dnl GLIBCPP_ENABLE_C99
1300 AC_DEFUN(GLIBCPP_ENABLE_C99, [dnl
1301 define([GLIBCPP_ENABLE_C99_DEFAULT], ifelse($1, yes, yes, no))dnl
1304 changequote(<<, >>)dnl
1305 <<--enable-c99 turns on 'ISO/IEC 9899:1999 support' [default=>>GLIBCPP_ENABLE_C99_DEFAULT],
1306 changequote([, ])dnl
1307 [case "$enableval" in
1308 yes) enable_c99=yes ;;
1309 no) enable_c99=no ;;
1310 *) AC_MSG_ERROR([Unknown argument to enable/disable C99]) ;;
1312 enable_c99=GLIBCPP_ENABLE_C99_DEFAULT)dnl
1317 # Check for the existence of <math.h> functions used if C99 is enabled.
1318 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
1319 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
1320 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
1321 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
1322 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
1323 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
1324 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
1325 AC_TRY_COMPILE([#include <math.h>],
1326 [isgreaterequal(0.0,0.0);], , [ac_c99_math=no])
1327 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
1328 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
1329 AC_TRY_COMPILE([#include <math.h>],
1330 [islessgreater(0.0,0.0);], , [ac_c99_math=no])
1331 AC_TRY_COMPILE([#include <math.h>],
1332 [isunordered(0.0,0.0);], , [ac_c99_math=no])
1334 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1335 AC_CHECK_FUNC(strtoll,,ac_c99_stdlib=no)
1336 AC_CHECK_FUNC(strtoull,,ac_c99_stdlib=no)
1337 AC_CHECK_FUNC(llabs,,ac_c99_stdlib=no)
1338 AC_CHECK_FUNC(lldiv,,ac_c99_stdlib=no)
1339 AC_CHECK_FUNC(atoll,,ac_c99_stdlib=no)
1341 AC_MSG_CHECKING([for lldiv_t declaration])
1342 AC_CACHE_VAL(ac_c99_lldiv_t, [
1343 AC_TRY_COMPILE([#include <stdlib.h>],
1345 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
1347 AC_MSG_RESULT($ac_c99_lldiv_t)
1348 if test x"$ac_c99_lldiv_t" = x"no"; then
1352 # Check for the existence of <wchar.h> functions used if C99 is enabled.
1353 AC_CHECK_FUNC(wcstold,,ac_c99_wchar=no)
1354 AC_CHECK_FUNC(wcstoll,,ac_c99_wchar=no)
1355 AC_CHECK_FUNC(wcstoull,,ac_c99_wchar=no)
1357 AC_MSG_CHECKING([for enabled ISO C99 support])
1358 if test x"$ac_c99_math" = x"no" || test x"$ac_c99_wchar" = x"no" \
1359 || test x"$ac_c99_stdlib" = x"no"; then
1362 AC_MSG_RESULT($enable_c99)
1364 # Option parsed, now set things appropriately
1365 if test x"$enable_c99" = x"yes"; then
1366 AC_DEFINE(_GLIBCPP_USE_C99)
1374 dnl Check for template specializations for the 'long long' type extension.
1375 dnl NB: Must check for C99 support before calling _GLIBCPP_ENABLE_LONG_LONG
1377 dnl GLIBCPP_ENABLE_LONG_LONG
1378 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1379 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1380 dnl + Usage: GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1381 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1382 dnl defaults to `no'.
1383 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1385 dnl GLIBCPP_ENABLE_LONG_LONG
1386 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1387 define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1389 AC_ARG_ENABLE(long-long,
1390 changequote(<<, >>)dnl
1391 <<--enable-long-long turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1392 changequote([, ])dnl
1393 [case "$enableval" in
1394 yes) enable_long_long=yes ;;
1395 no) enable_long_long=no ;;
1396 *) AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1398 enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1400 # iostreams require strtoll, strtoull to compile. If the
1401 # GLIBCPP_ENABLE_C99 tests found these, and if C99 support is enabled,
1402 # go ahead and allow long long to be used.
1403 if test x"$enable_c99" = x"no"; then
1404 enable_long_long=no;
1407 # Option parsed, now set things appropriately
1408 AC_MSG_CHECKING([for enabled long long support])
1409 if test x"$enable_long_long" = xyes; then
1410 AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1412 AC_MSG_RESULT($enable_long_long)
1417 dnl Check for what kind of C headers to use.
1419 dnl GLIBCPP_ENABLE_CHEADERS
1420 dnl --enable-cheaders= [does stuff].
1421 dnl --disable-cheaders [does not do anything, really].
1422 dnl + This will eventually need to be 'c_shadow' by default.
1423 dnl + Usage: GLIBCPP_ENABLE_CHEADERS[(DEFAULT)]
1424 dnl Where DEFAULT is either `c' or `c_std' or 'c_shadow'.
1425 dnl If ommitted, it defaults to `c_std'.
1426 AC_DEFUN(GLIBCPP_ENABLE_CHEADERS, [dnl
1427 define([GLIBCPP_ENABLE_CHEADERS_DEFAULT], ifelse($1, c_std, c_std, c_std))dnl
1428 AC_MSG_CHECKING([for c header strategy to use])
1429 AC_ARG_ENABLE(cheaders,
1430 changequote(<<, >>)dnl
1431 << --enable-cheaders construct "C" header files for g++ [default=>>GLIBCPP_ENABLE_CHEADERS_DEFAULT],
1433 [case "$enableval" in
1438 enable_cheaders=c_std
1441 enable_cheaders=c_shadow
1443 *) AC_MSG_ERROR([Unknown argument to enable/disable "C" headers])
1446 enable_cheaders=GLIBCPP_ENABLE_CHEADERS_DEFAULT)
1447 AC_MSG_RESULT($enable_cheaders)
1449 dnl Option parsed, now set things appropriately
1450 case "$enable_cheaders" in
1452 CSHADOW_FLAGS="-fno-builtin"
1453 C_INCLUDE_DIR='${top_srcdir}/include/c_shadow'
1454 AC_DEFINE(_GLIBCPP_USE_SHADOW_HEADERS)
1458 C_INCLUDE_DIR='${top_srcdir}/include/c_std'
1462 C_INCLUDE_DIR='${top_srcdir}/include/c'
1466 AC_SUBST(CSHADOW_FLAGS)
1467 AC_SUBST(C_INCLUDE_DIR)
1468 AM_CONDITIONAL(GLIBCPP_USE_CSHADOW, test "$enable_cheaders" = c_shadow)
1473 dnl Check for wide character support. Has the same effect as the option
1474 dnl in gcc's configure, but in a form that autoconf can mess with.
1476 dnl GLIBCPP_ENABLE_C_MBCHAR
1477 dnl --enable-c-mbchar requests all the wchar_t stuff.
1478 dnl --disable-c-mbchar doesn't.
1479 dnl + Usage: GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1480 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1481 dnl defaults to `no'.
1482 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1483 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1484 AC_ARG_ENABLE(c-mbchar,
1485 changequote(<<, >>)dnl
1486 << --enable-c-mbchar enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1487 changequote([, ])dnl
1488 [case "$enableval" in
1489 yes) enable_c_mbchar=yes ;;
1490 no) enable_c_mbchar=no ;;
1491 *) AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1493 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1494 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1499 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1501 dnl GLIBCPP_INCLUDE_DIR
1503 dnl TOPLEVEL_INCLUDES
1504 dnl LIBMATH_INCLUDES
1505 dnl LIBSUPCXX_INCLUDES
1507 dnl CSHADOW_INCLUDES
1509 dnl GLIBCPP_EXPORT_INCLUDE
1510 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1511 # Root level of the include sources.
1512 GLIBCPP_INCLUDE_DIR='$(top_srcdir)/include'
1514 # Can either use include/c or include/c_std to grab "C" headers. This
1515 # variable is set to the include directory currently in use.
1516 # set with C_INCLUDE_DIR in GLIBCPP_ENABLE_CHEADERS
1518 # Passed down for canadian crosses.
1519 if test x"$CANADIAN" = xyes; then
1520 TOPLEVEL_INCLUDES='-I$(includedir)'
1523 LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1525 LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1527 #if GLIBCPP_NEED_LIBIO
1528 LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1530 #LIBIO_INCLUDES='-I$(top_srcdir)/libio'
1533 #if GLIBCPP_USE_CSHADOW
1534 # CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR) \
1535 # -I$(top_blddir)/cshadow'
1537 CSTD_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR)'
1540 # Now, export this to all the little Makefiles....
1541 AC_SUBST(GLIBCPP_INCLUDE_DIR)
1542 AC_SUBST(TOPLEVEL_INCLUDES)
1543 AC_SUBST(LIBMATH_INCLUDES)
1544 AC_SUBST(LIBSUPCXX_INCLUDES)
1545 AC_SUBST(LIBIO_INCLUDES)
1546 AC_SUBST(CSTD_INCLUDES)
1551 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1553 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1554 # Optimization flags that are probably a good idea for thrill-seekers. Just
1555 # uncomment the lines below and make, everything else is ready to go...
1556 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1558 AC_SUBST(OPTIMIZE_CXXFLAGS)
1560 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings -Winline'
1561 AC_SUBST(WARN_FLAGS)
1565 dnl GLIBCPP_EXPORT_INSTALL_INFO
1566 dnl calculates gxx_install_dir
1567 dnl exports glibcpp_toolexecdir
1568 dnl exports glibcpp_toolexeclibdir
1569 dnl exports glibcpp_builddir
1570 dnl exports glibcpp_srcdir
1571 dnl exports glibcpp_prefixdir
1573 dnl Assumes cross_compiling bits already done, and with_cross_host in
1576 dnl GLIBCPP_EXPORT_INSTALL_INFO
1577 AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [
1579 glibcpp_toolexecdir=no
1580 glibcpp_toolexeclibdir=no
1582 # Export build and source directories.
1583 # These need to be absolute paths, thus the use of pwd.
1584 glibcpp_builddir=`pwd`
1585 glibcpp_srcdir=`cd ${srcdir} && pwd`
1586 glibcpp_prefixdir=`cd ${prefix} && pwd`
1588 AC_MSG_CHECKING([for interface version number])
1589 libstdcxx_interface=$INTERFACE
1590 AC_MSG_RESULT($libstdcxx_interface)
1592 # Process the option --with-gxx-include-dir=<path to include-files directory>
1593 AC_MSG_CHECKING([for --with-gxx-include-dir])
1594 AC_ARG_WITH(gxx-include-dir,
1595 [ --with-gxx-include-dir the installation directory for include files],
1596 [case "${withval}" in
1598 AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
1605 gxx_include_dir=${withval}
1607 esac], [gxx_include_dir=no])
1608 AC_MSG_RESULT($gxx_include_dir)
1610 # Process the option "--enable-version-specific-runtime-libs"
1611 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
1612 AC_ARG_ENABLE(version-specific-runtime-libs,
1613 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
1614 [ version_specific_libs=yes
1615 # Need the gcc compiler version to know where to install libraries
1616 # and header files if --enable-version-specific-runtime-libs option
1619 gcc_version_trigger=${srcdir}/../gcc/version.c
1620 gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([^\"]*\)\".*/\1/'`
1621 gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
1622 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/g++
1623 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1624 glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}
1626 ],version_specific_libs=no)
1627 AC_MSG_RESULT($version_specific_libs)
1629 # Default case for install directory for include files.
1630 if test x"$version_specific_libs" = x"no" \
1631 && test x"$gxx_include_dir" = x"no"; then
1632 gxx_include_dir='$(prefix)'/include/g++-${libstdcxx_interface}
1635 # Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir
1636 # Install a library built with a cross compiler in tooldir, not libdir.
1637 if test x"$glibcpp_toolexecdir" = x"no"; then
1638 if test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
1639 glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)'
1640 glibcpp_toolexeclibdir='$(toolexecdir)/lib$(MULTISUBDIR)'
1642 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1643 glibcpp_toolexeclibdir='$(libdir)$(MULTISUBDIR)'
1647 AC_MSG_CHECKING([for install location])
1648 AC_MSG_RESULT($gxx_include_dir)
1650 AC_SUBST(glibcpp_builddir)
1651 AC_SUBST(glibcpp_srcdir)
1652 AC_SUBST(glibcpp_prefixdir)
1653 AC_SUBST(gxx_include_dir)
1654 AC_SUBST(glibcpp_toolexecdir)
1655 AC_SUBST(glibcpp_toolexeclibdir)
1659 # Check whether LC_MESSAGES is available in <locale.h>.
1660 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1662 # This file file be copied and used freely without restrictions. It can
1663 # be used in projects which are not available under the GNU Public License
1664 # but which still want to provide support for the GNU gettext functionality.
1665 # Please note that the actual code is *not* freely available.
1669 AC_DEFUN(AC_LC_MESSAGES, [
1670 AC_CHECK_HEADER(locale.h, [
1671 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1672 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1673 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1674 if test $ac_cv_val_LC_MESSAGES = yes; then
1675 AC_DEFINE(HAVE_LC_MESSAGES)
1681 # Check for functions in math library.
1682 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1684 # This file can be copied and used freely without restrictions. It can
1685 # be used in projects which are not available under the GNU Public License
1686 # but which still want to provide support for the GNU gettext functionality.
1687 # Please note that the actual code is *not* freely available.
1691 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1692 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1693 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])
1694 AC_SUBST(LIBMATHOBJS)dnl
1698 # Check for string functions.
1699 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1701 # This file can be copied and used freely without restrictions. It can
1702 # be used in projects which are not available under the GNU Public License
1703 # but which still want to provide support for the GNU gettext functionality.
1704 # Please note that the actual code is *not* freely available.
1708 dnl AC_REPLACE_STRINGFUNCS(FUNCTION...)
1709 AC_DEFUN(AC_REPLACE_STRINGFUNCS,
1710 [AC_CHECK_FUNCS([$1], , [LIBSTRINGOBJS="$LIBSTRINGOBJS ${ac_func}.lo"])
1711 AC_SUBST(LIBSTRINGOBJS)dnl
1715 dnl This macro searches for a GNU version of make. If a match is found, the
1716 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1717 dnl set to "#". This is useful for including a special features in a Makefile,
1718 dnl which cannot be handled by other versions of make. The variable
1719 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1720 dnl the empty string otherwise.
1722 dnl Here is an example of its use:
1724 dnl Makefile.in might contain:
1726 dnl # A failsafe way of putting a dependency rule into a makefile
1728 dnl $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1730 dnl @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1731 dnl @ifGNUmake@ include $(DEPEND)
1732 dnl @ifGNUmake@ endif
1734 dnl Then configure.in would normally contain:
1736 dnl CHECK_GNU_MAKE()
1737 dnl AC_OUTPUT(Makefile)
1739 dnl Then perhaps to cause gnu make to override any other make, we could do
1740 dnl something like this (note that GNU make always looks for GNUmakefile first):
1742 dnl if ! test x$_cv_gnu_make_command = x ; then
1743 dnl mv Makefile GNUmakefile
1744 dnl echo .DEFAULT: > Makefile ;
1745 dnl echo \ $_cv_gnu_make_command \$@ >> Makefile;
1748 dnl Then, if any (well almost any) other make is called, and GNU make also
1749 dnl exists, then the other make wraps the GNU make.
1751 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1752 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1754 dnl #### Changes for libstdc++-v3: reformatting and linewrapping; prepending
1755 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1756 dnl #### conditional's subshell (" --version" is not a command), using a
1757 dnl #### different option to grep(1).
1759 dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not
1760 dnl #### ${MAKE:-make}).
1763 GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
1764 _cv_gnu_make_command='' ;
1765 dnl Search all the common names for GNU make
1766 for a in "${MAKE-make}" make gmake gnumake ; do
1767 if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
1769 _cv_gnu_make_command=$a ;
1774 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
1775 dnl string, '#' otherwise
1776 if test "x$_cv_gnu_make_command" != "x" ; then
1784 sinclude(../libtool.m4)
1785 dnl The lines below arrange for aclocal not to bring an installed
1786 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1787 dnl add a definition of LIBTOOL to Makefile.in.
1788 ifelse(,,,[AC_SUBST(LIBTOOL)
1789 AC_DEFUN([AM_PROG_LIBTOOL])
1790 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1791 AC_DEFUN([AC_PROG_LD])