1 dnl aclocal.m4 generated automatically by aclocal 1.4
3 dnl Copyright (C) 1994, 1995-8, 1999 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
8 dnl This program is distributed in the hope that it will be useful,
9 dnl but WITHOUT ANY WARRANTY, to the extent permitted by law; without
10 dnl even the implied warranty of MERCHANTABILITY or FITNESS FOR A
11 dnl PARTICULAR PURPOSE.
14 dnl Initialize configure bits.
17 AC_DEFUN(GLIBCPP_CONFIGURE, [
18 dnl Default to --enable-multilib
19 AC_ARG_ENABLE(multilib,
20 [ --enable-multilib build hella library versions (default)],
21 [case "${enableval}" in
24 *) AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
25 esac], [multilib=yes])dnl
27 glibcpp_basedir=$srcdir/$toprel/$1/libstdc++-v3
28 AC_SUBST(glibcpp_basedir)
30 AM_INIT_AUTOMAKE(libstdc++, 3.0.0)
32 # Never versions of autoconf add an underscore to these functions.
33 # Prevent future problems ...
34 ifdef([AC_PROG_CC_G],[],[define([AC_PROG_CC_G],defn([_AC_PROG_CC_G]))])
35 ifdef([AC_PROG_CC_GNU],[],[define([AC_PROG_CC_GNU],defn([_AC_PROG_CC_GNU]))])
36 ifdef([AC_PROG_CXX_G],[],[define([AC_PROG_CXX_G],defn([_AC_PROG_CXX_G]))])
37 ifdef([AC_PROG_CXX_GNU],[],[define([AC_PROG_CXX_GNU],defn([_AC_PROG_CXX_GNU]))])
41 # FIXME: We temporarily define our own version of AC_PROG_CC. This is
42 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS. We
43 # are probably using a cross compiler, which will not be able to fully
44 # link an executable. This should really be fixed in autoconf
47 AC_DEFUN(LIB_AC_PROG_CC,
48 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
49 dnl Fool anybody using AC_PROG_CC.
50 AC_PROVIDE([AC_PROG_CC])
51 AC_CHECK_PROG(CC, gcc, gcc)
52 if test -z "$CC"; then
53 AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
54 test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
59 if test $ac_cv_prog_gcc = yes; then
61 dnl Check whether -g works, even if CFLAGS is set, in case the package
62 dnl plays around with CFLAGS (such as to build both debugging and
63 dnl normal versions of a library), tasteless as that idea is.
64 ac_test_CFLAGS="${CFLAGS+set}"
65 ac_save_CFLAGS="$CFLAGS"
68 if test "$ac_test_CFLAGS" = set; then
69 CFLAGS="$ac_save_CFLAGS"
70 elif test $ac_cv_prog_cc_g = yes; then
77 test "${CFLAGS+set}" = set || CFLAGS="-g"
83 # Can't just call these here as g++ requires libstc++ to be built....
86 # Likewise for AC_PROG_CXX.
87 AC_DEFUN(LIB_AC_PROG_CXX,
88 [AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
89 dnl Fool anybody using AC_PROG_CXX.
90 AC_PROVIDE([AC_PROG_CXX])
91 # Use glibcpp_CXX so that we do not cause CXX to be cached with the
92 # flags that come in CXX while configuring libstdc++. They're different
93 # from those used for all other target libraries. If CXX is set in
94 # the environment, respect that here.
96 AC_CHECK_PROGS(glibcpp_CXX, $CCC c++ g++ gcc CC cxx cc++, gcc)
99 test -z "$glibcpp_CXX" && AC_MSG_ERROR([no acceptable c++ found in \$PATH])
103 if test $ac_cv_prog_gxx = yes; then
105 dnl Check whether -g works, even if CXXFLAGS is set, in case the package
106 dnl plays around with CXXFLAGS (such as to build both debugging and
107 dnl normal versions of a library), tasteless as that idea is.
108 ac_test_CXXFLAGS="${CXXFLAGS+set}"
109 ac_save_CXXFLAGS="$CXXFLAGS"
112 if test "$ac_test_CXXFLAGS" = set; then
113 CXXFLAGS="$ac_save_CXXFLAGS"
114 elif test $ac_cv_prog_cxx_g = yes; then
121 test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
127 AC_CHECK_TOOL(AS, as)
128 AC_CHECK_TOOL(AR, ar)
129 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
134 # We need AC_EXEEXT to keep automake happy in cygnus mode. However,
135 # at least currently, we never actually build a program, so we never
136 # need to use $(EXEEXT). Moreover, the test for EXEEXT normally
137 # fails, because we are probably configuring with a cross compiler
138 # which cant create executables. So we include AC_EXEEXT to keep
139 # automake happy, but we dont execute it, since we dont care about
142 # autoconf 2.50 runs AC_EXEEXT by default, and the macro expands
143 # to nothing, so nothing would remain between `then' and `fi' if it
144 # were not for the `:' below.
149 . [$]{glibcpp_basedir}/configure.host
151 case [$]{glibcpp_basedir} in
152 /* | [A-Za-z]:[\\/]*) libgcj_flagbasedir=[$]{glibcpp_basedir} ;;
153 *) glibcpp_flagbasedir='[$](top_builddir)/'[$]{glibcpp_basedir} ;;
156 # This does for the target what configure.host does for the host. In
157 # addition to possibly modifying the same flags, it also sets up symlinks.
163 dnl Check to see if g++ can compile this library, and if so, if any version-
164 dnl specific precautions need to be taken.
166 dnl GLIBCPP_CHECK_COMPILER_VERSION
167 AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [
168 if test ! -f stamp-sanity-compiler; then
169 AC_MSG_CHECKING([for g++ that will successfully compile libstdc++-v3])
176 ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to GCC 3.0 or above]))
178 AC_MSG_RESULT($gpp_satisfactory)
179 touch stamp-sanity-compiler
185 dnl Tests for newer compiler features, or features that are present in newer
186 dnl compiler versions but not older compiler versions still in use, should
189 dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the
190 dnl new inlining code or the new system_header pragma will die on -Werror.
191 dnl Leave it out by default and use maint-mode to use it.
193 dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if
194 dnl compiler supports it and the user has not requested debug mode.
196 dnl GLIBCPP_CHECK_COMPILER_FEATURES
197 AC_DEFUN(GLIBCPP_CHECK_COMPILER_FEATURES, [
198 # All these tests are for C++; save the language and the compiler flags.
199 # The CXXFLAGS thing is suspicious, but based on similar bits previously
200 # found in GLIBCPP_CONFIGURE.
203 ac_test_CXXFLAGS="${CXXFLAGS+set}"
204 ac_save_CXXFLAGS="$CXXFLAGS"
206 # Check for maintainer-mode bits.
207 if test x"$USE_MAINTAINER_MODE" = xno; then
213 # Check for -ffunction-sections -fdata-sections
214 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
215 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
216 AC_TRY_COMPILE(, [int foo;
217 ], [ac_fdsections=yes], [ac_fdsections=no])
218 if test "$ac_test_CXXFLAGS" = set; then
219 CXXFLAGS="$ac_save_CXXFLAGS"
221 # this is the suspicious part
224 if test x"$ac_fdsections" = x"yes" && test x"$enable_debug" = x"no"; then
225 SECTION_FLAGS='-ffunction-sections -fdata-sections'
227 AC_MSG_RESULT($ac_fdsections)
231 AC_SUBST(SECTION_FLAGS)
236 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
237 dnl the native linker is in use, all variables will be defined to something
238 dnl safe (like an empty string).
240 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
241 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
243 dnl GLIBCPP_CHECK_LINKER_FEATURES
244 AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [
245 # If we're not using GNU ld, then there's no point in even trying these
246 # tests. Check for that first. We should have already tested for gld
247 # by now (in libtool), but require it now just to be safe...
250 AC_REQUIRE([AC_PROG_LD])
253 if test "$ac_cv_prog_gnu_ld" = "notbroken"; then
254 # GNU ld it is! Joy and bunny rabbits!
256 # All these tests are for C++; save the language and the compiler flags.
257 # Need to do this so that g++ won't try to link in libstdc++
258 ac_test_CFLAGS="${CFLAGS+set}"
259 ac_save_CFLAGS="$CFLAGS"
260 CFLAGS='-x c++ -Wl,--gc-sections'
262 # Check for -Wl,--gc-sections
263 # XXX This test is broken at the moment, as symbols required for
264 # linking are now in libsupc++ (not built yet.....). In addition,
265 # this test has cored on solaris in the past. In addition,
266 # --gc-sections doesn't really work at the moment (keeps on discarding
267 # used sections, first .eh_frame and now some of the glibc sections for
268 # iconv). Bzzzzt. Thanks for playing, maybe next time.
269 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
277 ], [ac_sectionLDflags=yes],[ac_sectionLFflags=no], [ac_sectionLDflags=yes])
278 if test "$ac_test_CFLAGS" = set; then
279 CFLAGS="$ac_save_CFLAGS"
281 # this is the suspicious part
284 if test "$ac_sectionLDflags" = "yes"; then
285 SECTION_LDFLAGS='-Wl,--gc-sections'
287 AC_MSG_RESULT($ac_sectionLDflags)
290 # Set linker optimization flags.
291 if test x"$ac_cv_prog_gnu_ld" = x"yes" && test x"$enable_debug" = x"no"; then
292 OPT_LDFLAGS='-Wl,-O1'
295 AC_SUBST(SECTION_LDFLAGS)
296 AC_SUBST(OPT_LDFLAGS)
301 dnl Check to see if the (math function) argument passed is
302 dnl declared when using the c++ compiler
303 dnl ASSUMES argument is a math function with ONE parameter
305 dnl GLIBCPP_CHECK_MATH_DECL_1
306 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_1, [
307 AC_MSG_CHECKING([for $1 declaration])
308 if test x${glibcpp_cv_func_$1_use+set} != xset; then
309 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
312 AC_TRY_COMPILE([#include <math.h>
318 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
322 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
326 dnl Check to see if the (math function) argument passed is
327 dnl 1) declared when using the c++ compiler
328 dnl 2) has "C" linkage
329 dnl 3) if not, see if 1) and 2) for argument prepended with '_'
331 dnl Define HAVE_CARGF etc if "cargf" is declared and links
333 dnl argument 1 is name of function to check
335 dnl ASSUMES argument is a math function with ONE parameter
337 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1
338 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, [
339 GLIBCPP_CHECK_MATH_DECL_1($1)
340 if test x$glibcpp_cv_func_$1_use = x"yes"; then
343 GLIBCPP_CHECK_MATH_DECL_1(_$1)
344 if test x$glibcpp_cv_func__$1_use = x"yes"; then
352 dnl Like GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, but does a bunch of
353 dnl of functions at once. It's an all-or-nothing check -- either
354 dnl HAVE_XYZ is defined for each of the functions, or for none of them.
355 dnl Doing it this way saves significant configure time.
356 AC_DEFUN(GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1, [
357 AC_MSG_CHECKING([for $1 functions])
358 AC_CACHE_VAL(glibcpp_cv_func_$2_use, [
361 AC_TRY_COMPILE([#include <math.h>],
362 [ `for x in $3; do echo "$x (0);"; done` ],
363 [glibcpp_cv_func_$2_use=yes],
364 [glibcpp_cv_func_$2_use=no])
366 AC_MSG_RESULT($glibcpp_cv_func_$2_use)
367 if test x$glibcpp_cv_func_$2_use = x"yes"; then
373 dnl Check to see if the (math function) argument passed is
374 dnl declared when using the c++ compiler
375 dnl ASSUMES argument is a math function with TWO parameters
377 dnl GLIBCPP_CHECK_MATH_DECL_2
378 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_2, [
379 AC_MSG_CHECKING([for $1 declaration])
380 if test x${glibcpp_cv_func_$1_use+set} != xset; then
381 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
384 AC_TRY_COMPILE([#include <math.h>],
386 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
390 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
394 dnl Check to see if the (math function) argument passed is
395 dnl 1) declared when using the c++ compiler
396 dnl 2) has "C" linkage
398 dnl Define HAVE_CARGF etc if "cargf" is declared and links
400 dnl argument 1 is name of function to check
402 dnl ASSUMES argument is a math function with TWO parameters
404 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2
405 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2, [
406 GLIBCPP_CHECK_MATH_DECL_2($1)
407 if test x$glibcpp_cv_func_$1_use = x"yes"; then
410 GLIBCPP_CHECK_MATH_DECL_2(_$1)
411 if test x$glibcpp_cv_func__$1_use = x"yes"; then
419 dnl Check to see if the (math function) argument passed is
420 dnl declared when using the c++ compiler
421 dnl ASSUMES argument is a math function with THREE parameters
423 dnl GLIBCPP_CHECK_MATH_DECL_3
424 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_3, [
425 AC_MSG_CHECKING([for $1 declaration])
426 if test x${glibcpp_cv_func_$1_use+set} != xset; then
427 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
430 AC_TRY_COMPILE([#include <math.h>],
432 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
436 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
440 dnl Check to see if the (math function) argument passed is
441 dnl 1) declared when using the c++ compiler
442 dnl 2) has "C" linkage
444 dnl Define HAVE_CARGF etc if "cargf" is declared and links
446 dnl argument 1 is name of function to check
448 dnl ASSUMES argument is a math function with THREE parameters
450 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3
451 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3, [
452 GLIBCPP_CHECK_MATH_DECL_3($1)
453 if test x$glibcpp_cv_func_$1_use = x"yes"; then
456 GLIBCPP_CHECK_MATH_DECL_3(_$1)
457 if test x$glibcpp_cv_func__$1_use = x"yes"; then
465 dnl Check to see if the (stdlib function) argument passed is
466 dnl 1) declared when using the c++ compiler
467 dnl 2) has "C" linkage
469 dnl argument 1 is name of function to check
471 dnl ASSUMES argument is a math function with TWO parameters
473 dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2
474 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
475 AC_MSG_CHECKING([for $1 declaration])
476 if test x${glibcpp_cv_func_$1_use+set} != xset; then
477 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
480 AC_TRY_COMPILE([#include <stdlib.h>],
482 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
486 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
487 if test x$glibcpp_cv_func_$1_use = x"yes"; then
494 dnl Because the builtins are picky picky picky about the arguments they take,
495 dnl do an explict linkage tests here.
496 dnl Check to see if the (math function) argument passed is
497 dnl 1) declared when using the c++ compiler
498 dnl 2) has "C" linkage
500 dnl Define HAVE_CARGF etc if "cargf" is declared and links
502 dnl argument 1 is name of function to check
504 dnl ASSUMES argument is a math function with ONE parameter
506 dnl GLIBCPP_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
507 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
508 AC_MSG_CHECKING([for $1 declaration])
509 if test x${glibcpp_cv_func_$1_use+set} != xset; then
510 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
513 AC_TRY_COMPILE([#include <math.h>],
515 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
519 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
520 if test x$glibcpp_cv_func_$1_use = x"yes"; then
521 AC_MSG_CHECKING([for $1 linkage])
522 if test x${glibcpp_cv_func_$1_link+set} != xset; then
523 AC_CACHE_VAL(glibcpp_cv_func_$1_link, [
524 AC_TRY_LINK([#include <math.h>],
526 [glibcpp_cv_func_$1_link=yes], [glibcpp_cv_func_$1_link=no])
529 AC_MSG_RESULT($glibcpp_cv_func_$1_link)
530 if test x$glibcpp_cv_func_$1_link = x"yes"; then
531 ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
532 AC_DEFINE_UNQUOTED(${ac_tr_func})
539 dnl Check to see what builtin math functions are supported
541 dnl check for __builtin_abs
542 dnl check for __builtin_fabsf
543 dnl check for __builtin_fabs
544 dnl check for __builtin_fabl
545 dnl check for __builtin_labs
546 dnl check for __builtin_sqrtf
547 dnl check for __builtin_sqrtl
548 dnl check for __builtin_fsqrt
549 dnl check for __builtin_sinf
550 dnl check for __builtin_sin
551 dnl check for __builtin_sinl
552 dnl check for __builtin_cosf
553 dnl check for __builtin_cos
554 dnl check for __builtin_cosl
556 dnl GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
557 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT, [
558 dnl Test for builtin math functions.
559 dnl These are made in gcc/c-common.c
560 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
561 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
562 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
563 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
564 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
566 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
567 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fsqrt)
568 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
570 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
571 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
572 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
574 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
575 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
576 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
578 dnl There is, without a doubt, a more elegant way to have these
579 dnl names exported so that they won't be stripped out of acconfig.h by
580 dnl autoheader. I leave this as an exercise to somebody less frustrated
581 dnl than I.... please email the libstdc++ list if you can figure out a
582 dnl more elegant approach (see autoconf/acgen.m4 and specifically
583 dnl AC_CHECK_FUNC for things to steal.)
585 if test x$dummyvar = x"yes"; then
586 AC_DEFINE(HAVE___BUILTIN_ABS)
587 AC_DEFINE(HAVE___BUILTIN_LABS)
588 AC_DEFINE(HAVE___BUILTIN_COS)
589 AC_DEFINE(HAVE___BUILTIN_COSF)
590 AC_DEFINE(HAVE___BUILTIN_COSL)
591 AC_DEFINE(HAVE___BUILTIN_FABS)
592 AC_DEFINE(HAVE___BUILTIN_FABSF)
593 AC_DEFINE(HAVE___BUILTIN_FABSL)
594 AC_DEFINE(HAVE___BUILTIN_SIN)
595 AC_DEFINE(HAVE___BUILTIN_SINF)
596 AC_DEFINE(HAVE___BUILTIN_SINL)
597 AC_DEFINE(HAVE___BUILTIN_FSQRT)
598 AC_DEFINE(HAVE___BUILTIN_SQRTF)
599 AC_DEFINE(HAVE___BUILTIN_SQRTL)
605 dnl Check to see what the underlying c library
606 dnl These checks need to do two things:
607 dnl 1) make sure the name is declared when using the c++ compiler
608 dnl 2) make sure the name has "C" linkage
609 dnl This might seem like overkill but experience has shown that it's not...
611 dnl Define HAVE_STRTOLD if "strtold" is declared and links
612 dnl Define HAVE_STRTOF if "strtof" is declared and links
613 dnl Define HAVE_DRAND48 if "drand48" is declared and links
615 dnl GLIBCPP_CHECK_STDLIB_SUPPORT
616 AC_DEFUN(GLIBCPP_CHECK_STDLIB_SUPPORT, [
617 ac_test_CXXFLAGS="${CXXFLAGS+set}"
618 ac_save_CXXFLAGS="$CXXFLAGS"
619 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
621 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
622 AC_CHECK_FUNCS(drand48)
624 CXXFLAGS="$ac_save_CXXFLAGS"
629 dnl Check to see what the underlying c library or math library is like.
630 dnl These checks need to do two things:
631 dnl 1) make sure the name is declared when using the c++ compiler
632 dnl 2) make sure the name has "C" linkage
633 dnl This might seem like overkill but experience has shown that it's not...
635 dnl Define HAVE_CARGF etc if "cargf" is found.
637 dnl GLIBCPP_CHECK_MATH_SUPPORT
638 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
639 ac_test_CXXFLAGS="${CXXFLAGS+set}"
640 ac_save_CXXFLAGS="$CXXFLAGS"
641 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
644 AC_CHECK_LIB(m, sin, libm="-lm")
648 dnl Check to see if certain C math functions exist.
649 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
650 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
651 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
652 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
653 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
654 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
655 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
657 dnl Check to see if basic C math functions have float versions.
658 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
663 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
666 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
667 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
668 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
669 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
670 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
671 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
672 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
673 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
674 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
675 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
676 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
677 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
678 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
680 dnl Check to see if basic C math functions have long double versions.
681 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
686 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
689 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
690 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
691 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
692 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
693 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
694 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
695 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
696 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
697 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
698 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
699 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
700 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
701 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
702 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
703 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
704 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
706 dnl Some runtimes have these functions with a preceding underscore. Please
707 dnl keep this sync'd with the one above. And if you add any new symbol,
708 dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
709 dnl Check to see if certain C math functions exist.
711 dnl Check to see if basic C math functions have float versions.
712 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig,
714 _acosf _asinf _atanf \
716 _coshf _sinhf _tanhf)
717 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round,
721 dnl Check to see if basic C math functions have long double versions.
722 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig,
724 _acosl _asinl _atanl \
726 _coshl _sinhl _tanhl)
727 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round,
732 CXXFLAGS="$ac_save_CXXFLAGS"
737 dnl Check to see if there is native support for complex
739 dnl Don't compile bits in math/* if native support exits.
741 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "atan2l/copysignl" is found.
743 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
744 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
745 dnl Check for complex versions of math functions of platform.
746 AC_CHECK_LIB(m, main)
747 AC_REPLACE_MATHFUNCS(nan hypot hypotf atan2f expf copysignf)
749 dnl Compile the long double complex functions only if the function
750 dnl provides the non-complex long double functions that are needed.
751 dnl Currently this includes copysignl and atan2l, which should be
752 dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
753 USE_COMPLEX_LONG_DOUBLE=no
754 if test x$ac_cv_func_atan2l = x"yes" \
755 && test x$ac_cv_func_copysignl = x"yes"; then
756 USE_COMPLEX_LONG_DOUBLE=yes
757 AC_REPLACE_MATHFUNCS(hypotl signbitl)
760 AC_SUBST(USE_COMPLEX_LONG_DOUBLE)
764 dnl Check to see what architecture and operating system we are compiling
765 dnl for. Also, if architecture- or OS-specific flags are required for
766 dnl compilation, pick them up here.
768 dnl GLIBCPP_CHECK_TARGET
769 AC_DEFUN(GLIBCPP_CHECK_TARGET, [
770 . [$]{glibcpp_basedir}/configure.target
771 AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
772 AC_MSG_RESULT(OS config directory is $os_include_dir)
773 AC_LINK_FILES($os_include_dir/bits/os_defines.h, include/bits/os_defines.h)
778 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
779 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
780 dnl must have been previously checked.)
782 dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found
783 dnl Define HAVE_MBSTATE_T if mbstate_t is not in wchar.h
785 dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT
786 AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [
788 dnl Test wchar.h for mbstate_t, which is needed for char_traits and
789 dnl others even if wchar_t support is not on.
790 AC_MSG_CHECKING([for mbstate_t])
791 AC_TRY_COMPILE([#include <wchar.h>],
792 [mbstate_t teststate;],
793 have_mbstate_t=yes, have_mbstate_t=no)
794 AC_MSG_RESULT($have_mbstate_t)
795 if test x"$have_mbstate_t" = xyes; then
796 AC_DEFINE(HAVE_MBSTATE_T)
799 dnl Sanity check for existence of ISO C99 headers for extended encoding.
800 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
801 AC_CHECK_HEADER(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
803 dnl Only continue checking if the ISO C99 headers exist and support is on.
804 if test x"$ac_has_wchar_h" = xyes && test x"$ac_has_wctype_h" = xyes \
805 && test x"$enable_c_mbchar" != xno; then
807 dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
808 dnl numeric_limits can instantiate type_traits<wchar_t>
809 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
810 AC_TRY_COMPILE([#include <wchar.h>],
811 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
812 has_wchar_minmax=yes, has_wchar_minmax=no)
813 AC_MSG_RESULT($has_wchar_minmax)
815 dnl Test wchar.h for WEOF, which is what we use to determine whether
816 dnl to specialize for char_traits<wchar_t> or not.
817 AC_MSG_CHECKING([for WEOF])
820 #include <stddef.h>],
822 has_weof=yes, has_weof=no)
823 AC_MSG_RESULT($has_weof)
825 dnl Tests for wide character functions used in char_traits<wchar_t>.
827 AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset,, \
830 dnl Checks for names injected into std:: by the c_std headers.
831 AC_CHECK_FUNCS(btowc wctob fgetwc fgetwc fgetws fputwc fputws fwide \
832 fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
833 vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
834 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
835 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
836 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr,, \
839 AC_MSG_CHECKING([for ISO C99 wchar_t support])
840 if test x"$has_weof" = xyes && test x"$has_wchar_minmax" = xyes \
841 && test x"$ac_wfuncs" = xyes; then
842 ac_isoC99_wchar_t=yes
846 AC_MSG_RESULT($ac_isoC99_wchar_t)
848 dnl Use iconv for wchar_t to char conversions. As such, check for
849 dnl X/Open Portability Guide, version 2 features (XPG2).
850 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
851 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
853 dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
854 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
856 LIBS="$LIBS $libiconv"
858 AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
859 ac_XPG2funcs=yes, ac_XPG2funcs=no)
863 AC_MSG_CHECKING([for XPG2 wchar_t support])
864 if test x"$ac_has_iconv_h" = xyes && test x"$ac_has_langinfo_h" = xyes \
865 && test x"$ac_XPG2funcs" = xyes; then
870 AC_MSG_RESULT($ac_XPG2_wchar_t)
872 dnl At the moment, only enable wchar_t specializations if all the
873 dnl above support is present.
874 AC_MSG_CHECKING([for enabled wchar_t specializations])
875 if test x"$ac_isoC99_wchar_t" = xyes \
876 && test x"$ac_XPG2_wchar_t" = xyes; then
877 AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
883 dnl Wide characters disabled by the user.
884 AC_MSG_WARN([wchar_t support disabled.])
890 dnl Check for special debugging mode; not for production use.
892 dnl GLIBCPP_ENABLE_DEBUG
893 dnl --enable-debug sets '-ggdb3 -O0'.
894 dnl --disable-debug sets '-g' and whatever optimization options the
895 dnl compiler can handle.
896 dnl + --enable-maintainer-mode automatically defaults this to on.
897 dnl + Perhaps -D/-U of NDEBUG, DEBUG, DEBUG_ASSERT, ...?
898 dnl + Usage: GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
899 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
900 dnl defaults to `no'.
901 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
902 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
904 changequote(<<, >>)dnl
905 << --enable-debug extra debugging, turn off optimization [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
907 [case "${enableval}" in
908 yes) enable_debug=yes ;;
909 no) enable_debug=no ;;
910 *) AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
912 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
914 dnl Option parsed, now set things appropriately
915 case "${enable_debug}" in
917 DEBUG_FLAGS='-O0 -ggdb3'
923 AC_SUBST(DEBUG_FLAGS)
928 dnl Check for "unusual" flags to pass to the compiler while building.
930 dnl GLIBCPP_ENABLE_CXX_FLAGS
931 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
932 dnl experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
933 dnl Somehow this same set of flags must be passed when [re]building
935 dnl --disable-cxx-flags passes nothing.
936 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
937 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
938 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
939 dnl + Usage: GLIBCPP_ENABLE_CXX_FLAGS(default flags)
940 dnl If "default flags" is an empty string (or "none"), the effect is
941 dnl the same as --disable or --enable=no.
942 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
943 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
944 AC_ARG_ENABLE(cxx-flags,
945 changequote(<<, >>)dnl
946 << --enable-cxx-flags=FLAGS pass compiler FLAGS when building library;
947 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
949 [case "x$enableval" in
951 AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
953 enable_cxx_flags='' ;;
955 enable_cxx_flags="$enableval" ;;
957 enable_cxx_flags='GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT')
959 dnl Thinko on my part during design. This kludge is the workaround.
960 if test "$enable_cxx_flags" = "none"; then
964 dnl Run through flags (either default or command-line) and set anything
965 dnl extra (e.g., #defines) that must accompany particular g++ options.
966 if test -n "$enable_cxx_flags"; then
967 for f in $enable_cxx_flags; do
971 *) # and we're trying to pass /what/ exactly?
972 AC_MSG_ERROR([compiler flags start with a -]) ;;
976 EXTRA_CXX_FLAGS="$enable_cxx_flags"
977 AC_SUBST(EXTRA_CXX_FLAGS)
982 dnl Check for which locale library to use: gnu or generic.
984 dnl GLIBCPP_ENABLE_CLOCALE
985 dnl --enable-clocale=gnu sets config/c_locale_gnu.cc and friends
986 dnl --enable-clocale=generic sets config/c_locale_generic.cc and friends
988 dnl default is generic
990 AC_DEFUN(GLIBCPP_ENABLE_CLOCALE, [
991 AC_MSG_CHECKING([for clocale to use])
992 AC_ARG_ENABLE(clocale,
993 [ --enable-clocale enable model for target locale package.
994 --enable-clocale=MODEL use MODEL target-speific locale package. [default=generic]
996 if test x$enable_clocale = xno; then
997 enable_clocale=generic
999 enable_clocale=generic)
1001 enable_clocale_flag=$enable_clocale
1003 dnl Check if a valid locale package
1004 case x${enable_clocale_flag} in
1006 CLOCALE_H=config/c_locale_gnu.h
1007 CLOCALE_CC=config/c_locale_gnu.cc
1011 CLOCALE_H=config/c_locale_generic.h
1012 CLOCALE_CC=config/c_locale_generic.cc
1013 AC_MSG_RESULT(generic)
1016 echo "$enable_clocale is an unknown locale package" 1>&2
1021 AC_LINK_FILES($CLOCALE_H, include/bits/c++locale.h)
1022 AC_LINK_FILES($CLOCALE_CC, src/c++locale.cc)
1027 dnl Check for which I/O library to use: libio, or something specific.
1029 dnl GLIBCPP_ENABLE_CSTDIO
1030 dnl --enable-cstdio=libio sets config/c_io_libio.h and friends
1032 dnl default is stdio
1034 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1035 AC_MSG_CHECKING([for cstdio to use])
1036 AC_ARG_ENABLE(cstdio,
1037 [ --enable-cstdio enable stdio for target io package.
1038 --enable-cstdio=LIB use LIB target-speific io package. [default=stdio]
1040 if test x$enable_cstdio = xno; then
1043 enable_cstdio=stdio)
1045 enable_cstdio_flag=$enable_cstdio
1047 dnl Check if a valid I/O package
1048 case x${enable_cstdio_flag} in
1050 CSTDIO_H=config/c_io_libio.h
1051 BASIC_FILE_H=config/basic_file_libio.h
1052 BASIC_FILE_CC=config/basic_file_libio.cc
1053 AC_MSG_RESULT(libio)
1055 # see if we are on a system with libio native (ie, linux)
1056 AC_CHECK_HEADER(libio.h, has_libio=yes, has_libio=no)
1058 # Need to check and see what version of glibc is being used. If
1059 # it's not glibc-2.2 or higher, then we'll need to go ahead and
1060 # compile most of libio for linux systems.
1061 if test x$has_libio = x"yes"; then
1064 AC_MSG_CHECKING([for glibc version >= 2.2])
1065 AC_EGREP_CPP([ok], [
1066 #include <features.h>
1067 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1070 ], glibc_satisfactory=yes, glibc_satisfactory=no)
1071 AC_MSG_RESULT($glibc_satisfactory)
1075 # XXX at the moment, admit defeat and force the recompilation
1076 # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1077 glibc_satisfactory=no
1079 if test x$glibc_satisfactory = x"yes"; then
1084 # bkoz XXX need to add checks to enable this
1085 # pme XXX here's a first pass at such a check
1086 if test x$enable_c_mbchar != xno; then
1094 # Using libio, but <libio.h> doesn't exist on the target system. . .
1096 # bkoz XXX need to add checks to enable this
1097 # pme XXX here's a first pass at such a check
1098 if test x$enable_c_mbchar != xno; then
1105 xstdio | x | xno | xnone | xyes)
1107 CSTDIO_H=config/c_io_stdio.h
1108 BASIC_FILE_H=config/basic_file_stdio.h
1109 BASIC_FILE_CC=config/basic_file_stdio.cc
1110 AC_MSG_RESULT(stdio)
1112 # We're not using stdio.
1117 echo "$enable_cstdio is an unknown io package" 1>&2
1121 AC_LINK_FILES($CSTDIO_H, include/bits/c++io.h)
1122 AC_LINK_FILES($BASIC_FILE_H, include/bits/basic_file_model.h)
1123 AC_LINK_FILES($BASIC_FILE_CC, src/basic_file.cc)
1125 # 2000-08-04 bkoz hack
1126 CCODECVT_C=config/c_io_libio_codecvt.c
1127 AC_LINK_FILES($CCODECVT_C, libio/c_codecvt.c)
1128 # 2000-08-04 bkoz hack
1130 AM_CONDITIONAL(GLIBCPP_BUILD_LIBIO,
1131 test "$need_libio" = yes || test "$need_wlibio" = yes)
1132 AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1133 AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1134 if test "$need_libio" = yes || test "$need_wlibio" = yes; then
1135 libio_la=../libio/libio.la
1144 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1145 dnl We must stage the required headers so that they will be installed
1146 dnl with the library (unlike libgcc, the STL implementation is provided
1147 dnl solely within headers). Since we must not inject random user-space
1148 dnl macro names into user-provided C++ code, we first stage into <file>-in
1149 dnl and process to <file> with an output command. The reason for a two-
1150 dnl stage process here is to correctly handle $srcdir!=$objdir without
1151 dnl having to write complex code (the sed commands to clean the macro
1152 dnl namespace are complex and fragile enough as it is).
1154 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1155 AC_MSG_CHECKING([for thread model used by GCC])
1156 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
1157 AC_MSG_RESULT([$target_thread_file])
1159 AC_LINK_FILES($toprel/gcc/gthr.h, include/bits/gthr.h-in)
1160 AC_LINK_FILES($toprel/gcc/gthr-single.h,
1161 include/bits/gthr-single.h-in)
1162 AC_LINK_FILES($toprel/gcc/gthr-$target_thread_file.h,
1163 include/bits/gthr-default.h-in)
1164 if test $target_thread_file != single; then
1165 AC_DEFINE(HAVE_GTHR_DEFAULT)
1166 AC_DEFINE(_GLIBCPP_SUPPORTS_WEAK, __GXX_WEAK__)
1168 AC_OUTPUT_COMMANDS([d=include/bits
1169 rm -f $d/gthr.h $d/gthr-single.h $d/gthr-default.h
1170 sed '/^#/s/\([A-Z_][A-Z_]*\)/_GLIBCPP_\1/g' <$d/gthr.h-in >$d/gthr.h
1171 sed 's/\(UNUSED\)/_GLIBCPP_\1/g' <$d/gthr-single.h-in \
1172 | sed 's/\(GCC[A-Z_]*_H\)/_GLIBCPP_\1/g' >$d/gthr-single.h
1173 sed 's/\(UNUSED\)/_GLIBCPP_\1/g' <$d/gthr-default.h-in \
1174 | sed 's/\(GCC[A-Z_]*_H\)/_GLIBCPP_\1/g' \
1175 | sed 's/\([A-Z_]*WEAK\)/_GLIBCPP_\1/g' >$d/gthr-default.h])
1180 dnl Check for exception handling support. If an explicit enable/disable
1181 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1182 dnl target may or may not support call frame exceptions.
1184 dnl GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
1185 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1186 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1188 dnl Define _GLIBCPP_SJLJ_EXCEPTIONS if the compiler is configured for it.
1190 AC_DEFUN(GLIBCPP_ENABLE_SJLJ_EXCEPTIONS, [
1191 AC_MSG_CHECKING([for exception model to use])
1194 AC_ARG_ENABLE(sjlj-exceptions,
1195 [ --enable-sjlj-exceptions force use of builtin_setjmp for exceptions],
1197 [dnl Botheration. Now we've got to detect the exception model.
1198 dnl Link tests against libgcc.a are problematic since -- at least
1199 dnl as of this writing -- we've not been given proper -L bits for
1200 dnl single-tree newlib and libgloss.
1202 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
1203 dnl conftest files before we got a change to grep them first.
1204 cat > conftest.$ac_ext << EOF
1205 [#]line __oline__ "configure"
1214 old_CXXFLAGS="$CXXFLAGS"
1216 if AC_TRY_EVAL(ac_compile); then
1217 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1218 enable_sjlj_exceptions=yes
1219 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1220 enable_sjlj_exceptions=no
1223 CXXFLAGS="$old_CXXFLAGS"
1225 if test x$enable_sjlj_exceptions = xyes; then
1226 AC_DEFINE(_GLIBCPP_SJLJ_EXCEPTIONS, 1,
1227 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1228 ac_exception_model_name=sjlj
1229 elif test x$enable_sjlj_exceptions = xno; then
1230 ac_exception_model_name="call frame"
1232 AC_MSG_ERROR([unable to detect exception model])
1235 AC_MSG_RESULT($ac_exception_model_name)
1240 dnl Check for ISO/IEC 9899:1999 "C99" support.
1242 dnl GLIBCPP_ENABLE_C99
1243 dnl --enable-c99 defines _GLIBCPP_USE_C99
1244 dnl --disable-c99 leaves _GLIBCPP_USE_C99 undefined
1245 dnl + Usage: GLIBCPP_ENABLE_C99[(DEFAULT)]
1246 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1247 dnl defaults to `no'.
1248 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
1250 dnl GLIBCPP_ENABLE_C99
1251 AC_DEFUN(GLIBCPP_ENABLE_C99, [dnl
1252 define([GLIBCPP_ENABLE_C99_DEFAULT], ifelse($1, yes, yes, no))dnl
1255 changequote(<<, >>)dnl
1256 <<--enable-c99 turns on 'ISO/IEC 9899:1999 support' [default=>>GLIBCPP_ENABLE_C99_DEFAULT],
1257 changequote([, ])dnl
1258 [case "$enableval" in
1259 yes) enable_c99=yes ;;
1260 no) enable_c99=no ;;
1261 *) AC_MSG_ERROR([Unknown argument to enable/disable C99]) ;;
1263 enable_c99=GLIBCPP_ENABLE_C99_DEFAULT)dnl
1268 # Check for the existence of <math.h> functions used if C99 is enabled.
1270 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
1271 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
1272 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
1273 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
1274 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
1275 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
1276 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
1277 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
1278 AC_TRY_COMPILE([#include <math.h>],
1279 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
1280 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
1281 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
1282 AC_TRY_COMPILE([#include <math.h>],
1283 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
1284 AC_TRY_COMPILE([#include <math.h>],
1285 [isunordered(0.0,0.0);],, [ac_c99_math=no])
1286 AC_MSG_RESULT($ac_c99_math)
1288 # Check for the existence in <stdio.h> of vscanf, et. al.
1290 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1291 AC_TRY_COMPILE([#include <stdio.h>],
1292 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
1293 AC_TRY_COMPILE([#include <stdio.h>
1295 void foo(char* fmt, ...)
1296 {va_list args; va_start(args, fmt);
1297 vfscanf(stderr, "%i", args);}],
1298 [],, [ac_c99_stdio=no])
1299 AC_TRY_COMPILE([#include <stdio.h>
1301 void foo(char* fmt, ...)
1302 {va_list args; va_start(args, fmt);
1303 vscanf("%i", args);}],
1304 [],, [ac_c99_stdio=no])
1305 AC_TRY_COMPILE([#include <stdio.h>
1307 void foo(char* fmt, ...)
1308 {va_list args; va_start(args, fmt);
1309 vsnprintf(fmt, 0, "%i", args);}],
1310 [],, [ac_c99_stdio=no])
1311 AC_TRY_COMPILE([#include <stdio.h>
1313 void foo(char* fmt, ...)
1314 {va_list args; va_start(args, fmt);
1315 vsscanf(fmt, "%i", args);}],
1316 [],, [ac_c99_stdio=no])
1317 AC_MSG_RESULT($ac_c99_stdio)
1319 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1321 AC_MSG_CHECKING([for lldiv_t declaration])
1322 AC_CACHE_VAL(ac_c99_lldiv_t, [
1323 AC_TRY_COMPILE([#include <stdlib.h>],
1325 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
1327 AC_MSG_RESULT($ac_c99_lldiv_t)
1329 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1330 AC_TRY_COMPILE([#include <stdlib.h>],
1331 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
1332 AC_TRY_COMPILE([#include <stdlib.h>],
1333 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
1334 AC_TRY_COMPILE([#include <stdlib.h>],
1335 [char* tmp; strtoll("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1336 AC_TRY_COMPILE([#include <stdlib.h>],
1337 [char* tmp; strtoull("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1338 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
1339 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
1340 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
1341 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
1342 if test x"$ac_c99_lldiv_t" = x"no"; then
1345 AC_MSG_RESULT($ac_c99_stdlib)
1347 # Check for the existence of <wchar.h> functions used if C99 is enabled.
1348 # XXX the wchar.h checks should be rolled into the general C99 bits.
1350 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
1351 AC_TRY_COMPILE([#include <wchar.h>],
1352 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
1353 AC_TRY_COMPILE([#include <wchar.h>],
1354 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
1355 AC_TRY_COMPILE([#include <wchar.h>],
1356 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
1357 AC_MSG_RESULT($ac_c99_wchar)
1359 AC_MSG_CHECKING([for enabled ISO C99 support])
1360 if test x"$ac_c99_math" = x"no" || test x"$ac_c99_stdio" = x"no" \
1361 || test x"$ac_c99_stdlib" = x"no" \
1362 || test x"$ac_c99_wchar" = x"no"; then
1365 AC_MSG_RESULT($enable_c99)
1367 # Option parsed, now set things appropriately
1368 if test x"$enable_c99" = x"yes"; then
1369 AC_DEFINE(_GLIBCPP_USE_C99)
1377 dnl Check for template specializations for the 'long long' type extension.
1378 dnl NB: Must check for C99 support before calling _GLIBCPP_ENABLE_LONG_LONG
1380 dnl GLIBCPP_ENABLE_LONG_LONG
1381 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1382 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1383 dnl + Usage: GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1384 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1385 dnl defaults to `no'.
1386 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1388 dnl GLIBCPP_ENABLE_LONG_LONG
1389 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1390 define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1392 AC_ARG_ENABLE(long-long,
1393 changequote(<<, >>)dnl
1394 <<--enable-long-long turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1395 changequote([, ])dnl
1396 [case "$enableval" in
1397 yes) enable_long_long=yes ;;
1398 no) enable_long_long=no ;;
1399 *) AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1401 enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1403 # iostreams require strtoll, strtoull to compile. If the
1404 # GLIBCPP_ENABLE_C99 tests found these, and if C99 support is enabled,
1405 # go ahead and allow long long to be used.
1406 if test x"$enable_c99" = x"no"; then
1407 enable_long_long=no;
1410 # Option parsed, now set things appropriately
1411 AC_MSG_CHECKING([for enabled long long support])
1412 if test x"$enable_long_long" = xyes; then
1413 AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1415 AC_MSG_RESULT($enable_long_long)
1420 dnl Check for what kind of C headers to use.
1422 dnl GLIBCPP_ENABLE_CHEADERS
1423 dnl --enable-cheaders= [does stuff].
1424 dnl --disable-cheaders [does not do anything, really].
1425 dnl + This will eventually need to be 'c_shadow' by default.
1426 dnl + Usage: GLIBCPP_ENABLE_CHEADERS[(DEFAULT)]
1427 dnl Where DEFAULT is either `c' or `c_std' or 'c_shadow'.
1428 dnl If ommitted, it defaults to `c_std'.
1429 AC_DEFUN(GLIBCPP_ENABLE_CHEADERS, [dnl
1430 define([GLIBCPP_ENABLE_CHEADERS_DEFAULT], ifelse($1, c_std, c_std, c_std))dnl
1431 AC_MSG_CHECKING([for c header strategy to use])
1432 AC_ARG_ENABLE(cheaders,
1433 changequote(<<, >>)dnl
1434 << --enable-cheaders construct "C" header files for g++ [default=>>GLIBCPP_ENABLE_CHEADERS_DEFAULT],
1436 [case "$enableval" in
1441 enable_cheaders=c_std
1444 enable_cheaders=c_shadow
1446 *) AC_MSG_ERROR([Unknown argument to enable/disable "C" headers])
1449 enable_cheaders=GLIBCPP_ENABLE_CHEADERS_DEFAULT)
1450 AC_MSG_RESULT($enable_cheaders)
1452 dnl Option parsed, now set things appropriately
1453 case "$enable_cheaders" in
1455 CSHADOW_FLAGS="-fno-builtin"
1456 C_INCLUDE_DIR='${top_srcdir}/include/c_shadow'
1457 AC_DEFINE(_GLIBCPP_USE_SHADOW_HEADERS)
1461 C_INCLUDE_DIR='${top_srcdir}/include/c_std'
1465 C_INCLUDE_DIR='${top_srcdir}/include/c'
1469 AC_SUBST(CSHADOW_FLAGS)
1470 AC_SUBST(C_INCLUDE_DIR)
1471 AM_CONDITIONAL(GLIBCPP_USE_CSHADOW, test "$enable_cheaders" = c_shadow)
1476 dnl Check for wide character support. Has the same effect as the option
1477 dnl in gcc's configure, but in a form that autoconf can mess with.
1479 dnl GLIBCPP_ENABLE_C_MBCHAR
1480 dnl --enable-c-mbchar requests all the wchar_t stuff.
1481 dnl --disable-c-mbchar doesn't.
1482 dnl + Usage: GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1483 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1484 dnl defaults to `no'.
1485 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1486 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1487 AC_ARG_ENABLE(c-mbchar,
1488 changequote(<<, >>)dnl
1489 << --enable-c-mbchar enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1490 changequote([, ])dnl
1491 [case "$enableval" in
1492 yes) enable_c_mbchar=yes ;;
1493 no) enable_c_mbchar=no ;;
1494 *) AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1496 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1497 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1502 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1504 dnl GLIBCPP_INCLUDE_DIR
1506 dnl TOPLEVEL_INCLUDES
1507 dnl LIBMATH_INCLUDES
1508 dnl LIBSUPCXX_INCLUDES
1510 dnl CSHADOW_INCLUDES
1512 dnl GLIBCPP_EXPORT_INCLUDE
1513 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1514 # Root level of the include sources.
1515 GLIBCPP_INCLUDE_DIR='$(top_srcdir)/include'
1517 # Can either use include/c or include/c_std to grab "C" headers. This
1518 # variable is set to the include directory currently in use.
1519 # set with C_INCLUDE_DIR in GLIBCPP_ENABLE_CHEADERS
1521 # Passed down for canadian crosses.
1522 if test x"$CANADIAN" = xyes; then
1523 TOPLEVEL_INCLUDES='-I$(includedir)'
1526 LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1528 LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1530 #if GLIBCPP_NEED_LIBIO
1531 LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1533 #LIBIO_INCLUDES='-I$(top_srcdir)/libio'
1536 #if GLIBCPP_USE_CSHADOW
1537 # CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR) \
1538 # -I$(top_blddir)/cshadow'
1540 CSTD_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR)'
1543 # Now, export this to all the little Makefiles....
1544 AC_SUBST(GLIBCPP_INCLUDE_DIR)
1545 AC_SUBST(TOPLEVEL_INCLUDES)
1546 AC_SUBST(LIBMATH_INCLUDES)
1547 AC_SUBST(LIBSUPCXX_INCLUDES)
1548 AC_SUBST(LIBIO_INCLUDES)
1549 AC_SUBST(CSTD_INCLUDES)
1554 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1556 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1557 # Optimization flags that are probably a good idea for thrill-seekers. Just
1558 # uncomment the lines below and make, everything else is ready to go...
1559 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1561 AC_SUBST(OPTIMIZE_CXXFLAGS)
1563 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings -Winline'
1564 AC_SUBST(WARN_FLAGS)
1568 dnl GLIBCPP_EXPORT_INSTALL_INFO
1569 dnl calculates gxx_install_dir
1570 dnl exports glibcpp_toolexecdir
1571 dnl exports glibcpp_toolexeclibdir
1572 dnl exports glibcpp_builddir
1573 dnl exports glibcpp_srcdir
1574 dnl exports glibcpp_prefixdir
1576 dnl Assumes cross_compiling bits already done, and with_cross_host in
1579 dnl GLIBCPP_EXPORT_INSTALL_INFO
1580 AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [
1582 glibcpp_toolexecdir=no
1583 glibcpp_toolexeclibdir=no
1585 # Export build and source directories.
1586 # These need to be absolute paths, yet at the same time need to
1587 # canonicalize only relative paths, because then amd will not unmount
1588 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
1589 glibcpp_builddir=`pwd`
1591 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
1592 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
1594 glibcpp_prefixdir=${prefix}
1596 AC_MSG_CHECKING([for interface version number])
1597 libstdcxx_interface=$INTERFACE
1598 AC_MSG_RESULT($libstdcxx_interface)
1600 # Process the option --with-gxx-include-dir=<path to include-files directory>
1601 AC_MSG_CHECKING([for --with-gxx-include-dir])
1602 AC_ARG_WITH(gxx-include-dir,
1603 [ --with-gxx-include-dir the installation directory for include files],
1604 [case "${withval}" in
1606 AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
1613 gxx_include_dir=${withval}
1615 esac], [gxx_include_dir=no])
1616 AC_MSG_RESULT($gxx_include_dir)
1618 # Process the option "--enable-version-specific-runtime-libs"
1619 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
1620 AC_ARG_ENABLE(version-specific-runtime-libs,
1621 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
1622 [ version_specific_libs=yes
1623 # Need the gcc compiler version to know where to install libraries
1624 # and header files if --enable-version-specific-runtime-libs option
1627 gcc_version_trigger=${srcdir}/../gcc/version.c
1628 gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([^\"]*\)\".*/\1/'`
1629 gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
1630 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/g++
1631 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1632 glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}
1634 ],version_specific_libs=no)
1635 AC_MSG_RESULT($version_specific_libs)
1637 # Default case for install directory for include files.
1638 if test x"$version_specific_libs" = x"no" \
1639 && test x"$gxx_include_dir" = x"no"; then
1640 gxx_include_dir='$(prefix)'/include/g++-${libstdcxx_interface}
1643 # Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir
1644 # Install a library built with a cross compiler in tooldir, not libdir.
1645 if test x"$glibcpp_toolexecdir" = x"no"; then
1646 if test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
1647 glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)'
1648 glibcpp_toolexeclibdir='$(toolexecdir)/lib$(MULTISUBDIR)'
1650 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1651 glibcpp_toolexeclibdir='$(libdir)$(MULTISUBDIR)'
1655 AC_MSG_CHECKING([for install location])
1656 AC_MSG_RESULT($gxx_include_dir)
1658 AC_SUBST(glibcpp_builddir)
1659 AC_SUBST(glibcpp_srcdir)
1660 AC_SUBST(glibcpp_prefixdir)
1661 AC_SUBST(gxx_include_dir)
1662 AC_SUBST(glibcpp_toolexecdir)
1663 AC_SUBST(glibcpp_toolexeclibdir)
1667 # Check whether LC_MESSAGES is available in <locale.h>.
1668 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1670 # This file file be copied and used freely without restrictions. It can
1671 # be used in projects which are not available under the GNU Public License
1672 # but which still want to provide support for the GNU gettext functionality.
1673 # Please note that the actual code is *not* freely available.
1677 AC_DEFUN(AC_LC_MESSAGES, [
1678 AC_CHECK_HEADER(locale.h, [
1679 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1680 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1681 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1682 if test $ac_cv_val_LC_MESSAGES = yes; then
1683 AC_DEFINE(HAVE_LC_MESSAGES)
1689 # Check for functions in math library.
1690 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1692 # This file can be copied and used freely without restrictions. It can
1693 # be used in projects which are not available under the GNU Public License
1694 # but which still want to provide support for the GNU gettext functionality.
1695 # Please note that the actual code is *not* freely available.
1699 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1700 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1701 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])
1702 AC_SUBST(LIBMATHOBJS)dnl
1706 # Check for string functions.
1707 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1709 # This file can be copied and used freely without restrictions. It can
1710 # be used in projects which are not available under the GNU Public License
1711 # but which still want to provide support for the GNU gettext functionality.
1712 # Please note that the actual code is *not* freely available.
1716 dnl AC_REPLACE_STRINGFUNCS(FUNCTION...)
1717 AC_DEFUN(AC_REPLACE_STRINGFUNCS,
1718 [AC_CHECK_FUNCS([$1], , [LIBSTRINGOBJS="$LIBSTRINGOBJS ${ac_func}.lo"])
1719 AC_SUBST(LIBSTRINGOBJS)dnl
1723 dnl This macro searches for a GNU version of make. If a match is found, the
1724 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1725 dnl set to "#". This is useful for including a special features in a Makefile,
1726 dnl which cannot be handled by other versions of make. The variable
1727 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1728 dnl the empty string otherwise.
1730 dnl Here is an example of its use:
1732 dnl Makefile.in might contain:
1734 dnl # A failsafe way of putting a dependency rule into a makefile
1736 dnl $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1738 dnl @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1739 dnl @ifGNUmake@ include $(DEPEND)
1740 dnl @ifGNUmake@ endif
1742 dnl Then configure.in would normally contain:
1744 dnl CHECK_GNU_MAKE()
1745 dnl AC_OUTPUT(Makefile)
1747 dnl Then perhaps to cause gnu make to override any other make, we could do
1748 dnl something like this (note that GNU make always looks for GNUmakefile first):
1750 dnl if ! test x$_cv_gnu_make_command = x ; then
1751 dnl mv Makefile GNUmakefile
1752 dnl echo .DEFAULT: > Makefile ;
1753 dnl echo \ $_cv_gnu_make_command \$@ >> Makefile;
1756 dnl Then, if any (well almost any) other make is called, and GNU make also
1757 dnl exists, then the other make wraps the GNU make.
1759 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1760 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1762 dnl #### Changes for libstdc++-v3: reformatting and linewrapping; prepending
1763 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1764 dnl #### conditional's subshell (" --version" is not a command), using a
1765 dnl #### different option to grep(1).
1767 dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not
1768 dnl #### ${MAKE:-make}).
1771 GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
1772 _cv_gnu_make_command='' ;
1773 dnl Search all the common names for GNU make
1774 for a in "${MAKE-make}" make gmake gnumake ; do
1775 if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
1777 _cv_gnu_make_command=$a ;
1782 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
1783 dnl string, '#' otherwise
1784 if test "x$_cv_gnu_make_command" != "x" ; then
1792 sinclude(../libtool.m4)
1793 dnl The lines below arrange for aclocal not to bring an installed
1794 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1795 dnl add a definition of LIBTOOL to Makefile.in.
1796 ifelse(,,,[AC_SUBST(LIBTOOL)
1797 AC_DEFUN([AM_PROG_LIBTOOL])
1798 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1799 AC_DEFUN([AC_PROG_LD])
1804 # Do all the work for Automake. This macro actually does too much --
1805 # some checks are only needed if your package does certain things.
1806 # But this isn't really a big deal.
1811 dnl AM_INIT_AUTOMAKE(package,version, [no-define])
1813 AC_DEFUN(AM_INIT_AUTOMAKE,
1814 [AC_REQUIRE([AC_PROG_INSTALL])
1819 dnl test to see if srcdir already configured
1820 if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
1821 AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
1824 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of package])
1825 AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version number of package]))
1826 AC_REQUIRE([AM_SANITY_CHECK])
1827 AC_REQUIRE([AC_ARG_PROGRAM])
1828 dnl FIXME This is truly gross.
1829 missing_dir=`cd $ac_aux_dir && pwd`
1830 AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
1831 AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
1832 AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
1833 AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
1834 AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
1835 AC_REQUIRE([AC_PROG_MAKE_SET])])
1838 # Check to make sure that the build environment is sane.
1841 AC_DEFUN(AM_SANITY_CHECK,
1842 [AC_MSG_CHECKING([whether build environment is sane])
1845 echo timestamp > conftestfile
1846 # Do `set' in a subshell so we don't clobber the current shell's
1847 # arguments. Must try -L first in case configure is actually a
1848 # symlink; some systems play weird games with the mod time of symlinks
1849 # (eg FreeBSD returns the mod time of the symlink's containing
1852 set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
1853 if test "[$]*" = "X"; then
1855 set X `ls -t $srcdir/configure conftestfile`
1857 if test "[$]*" != "X $srcdir/configure conftestfile" \
1858 && test "[$]*" != "X conftestfile $srcdir/configure"; then
1860 # If neither matched, then we have a broken ls. This can happen
1861 # if, for instance, CONFIG_SHELL is bash and it inherits a
1862 # broken ls alias from the environment. This has actually
1863 # happened. Such a system could not be considered "sane".
1864 AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
1865 alias in your environment])
1868 test "[$]2" = conftestfile
1874 AC_MSG_ERROR([newly created file is older than distributed files!
1875 Check your system clock])
1878 AC_MSG_RESULT(yes)])
1880 dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
1881 dnl The program must properly implement --version.
1882 AC_DEFUN(AM_MISSING_PROG,
1883 [AC_MSG_CHECKING(for working $2)
1884 # Run test in a subshell; some versions of sh will print an error if
1885 # an executable is not found, even if stderr is redirected.
1886 # Redirect stdin to placate older versions of autoconf. Sigh.
1887 if ($2 --version) < /dev/null > /dev/null 2>&1; then
1889 AC_MSG_RESULT(found)
1892 AC_MSG_RESULT(missing)
1896 # Add --enable-maintainer-mode option to configure.
1901 AC_DEFUN(AM_MAINTAINER_MODE,
1902 [AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
1903 dnl maintainer-mode is disabled by default
1904 AC_ARG_ENABLE(maintainer-mode,
1905 [ --enable-maintainer-mode enable make rules and dependencies not useful
1906 (and sometimes confusing) to the casual installer],
1907 USE_MAINTAINER_MODE=$enableval,
1908 USE_MAINTAINER_MODE=no)
1909 AC_MSG_RESULT($USE_MAINTAINER_MODE)
1910 AM_CONDITIONAL(MAINTAINER_MODE, test $USE_MAINTAINER_MODE = yes)
1911 MAINT=$MAINTAINER_MODE_TRUE
1916 # Define a conditional.
1918 AC_DEFUN(AM_CONDITIONAL,
1929 # Like AC_CONFIG_HEADER, but automatically create stamp file.
1931 AC_DEFUN(AM_CONFIG_HEADER,
1933 AC_CONFIG_HEADER([$1])
1934 dnl When config.status generates a header, we must update the stamp-h file.
1935 dnl This file resides in the same directory as the config header
1936 dnl that is generated. We must strip everything past the first ":",
1937 dnl and everything past the last "/".
1938 AC_OUTPUT_COMMANDS(changequote(<<,>>)dnl
1939 ifelse(patsubst(<<$1>>, <<[^ ]>>, <<>>), <<>>,
1940 <<test -z "<<$>>CONFIG_HEADERS" || echo timestamp > patsubst(<<$1>>, <<^\([^:]*/\)?.*>>, <<\1>>)stamp-h<<>>dnl>>,
1942 for am_file in <<$1>>; do
1943 case " <<$>>CONFIG_HEADERS " in
1944 *" <<$>>am_file "*<<)>>
1945 echo timestamp > `echo <<$>>am_file | sed -e 's%:.*%%' -e 's%[^/]*$%%'`stamp-h$am_indx
1948 am_indx=`expr "<<$>>am_indx" + 1`