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)
656 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypot)
658 dnl Check to see if basic C math functions have float versions.
659 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
664 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
667 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
668 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
669 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2f)
670 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
671 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
672 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
673 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypotf)
674 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
675 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
676 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
677 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
678 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
679 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
680 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
681 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
683 dnl Check to see if basic C math functions have long double versions.
684 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
689 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
692 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
693 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
694 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
695 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
696 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
697 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
698 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
699 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
700 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(hypotl)
701 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
702 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
703 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
704 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
705 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
706 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
707 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
708 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
710 dnl Some runtimes have these functions with a preceding underscore. Please
711 dnl keep this sync'd with the one above. And if you add any new symbol,
712 dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
713 dnl Check to see if certain C math functions exist.
715 dnl Check to see if basic C math functions have float versions.
716 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig,
718 _acosf _asinf _atanf \
720 _coshf _sinhf _tanhf)
721 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round,
725 dnl Check to see if basic C math functions have long double versions.
726 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig,
728 _acosl _asinl _atanl \
730 _coshl _sinhl _tanhl)
731 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round,
736 CXXFLAGS="$ac_save_CXXFLAGS"
741 dnl Check to see if there is native support for complex
743 dnl Don't compile bits in math/* if native support exits.
745 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "copysignl" is found.
747 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
748 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
749 dnl Check for complex versions of math functions of platform.
750 AC_CHECK_LIB(m, main)
751 AC_REPLACE_MATHFUNCS(nan copysignf)
753 dnl Compile the long double complex functions only if the function
754 dnl provides the non-complex long double functions that are needed.
755 dnl Currently this includes copysignl, which should be
756 dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
757 USE_COMPLEX_LONG_DOUBLE=no
758 if test x$ac_cv_func_copysignl = x"yes"; then
759 USE_COMPLEX_LONG_DOUBLE=yes
760 AC_REPLACE_MATHFUNCS(signbitl)
763 AC_SUBST(USE_COMPLEX_LONG_DOUBLE)
767 dnl Check to see what architecture and operating system we are compiling
768 dnl for. Also, if architecture- or OS-specific flags are required for
769 dnl compilation, pick them up here.
771 dnl GLIBCPP_CHECK_TARGET
772 AC_DEFUN(GLIBCPP_CHECK_TARGET, [
773 . [$]{glibcpp_basedir}/configure.target
774 AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
775 AC_MSG_RESULT(OS config directory is $os_include_dir)
780 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
781 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
782 dnl must have been previously checked.)
784 dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found
785 dnl Define HAVE_MBSTATE_T if mbstate_t is not in wchar.h
787 dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT
788 AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [
790 dnl Test wchar.h for mbstate_t, which is needed for char_traits and
791 dnl others even if wchar_t support is not on.
792 AC_MSG_CHECKING([for mbstate_t])
793 AC_TRY_COMPILE([#include <wchar.h>],
794 [mbstate_t teststate;],
795 have_mbstate_t=yes, have_mbstate_t=no)
796 AC_MSG_RESULT($have_mbstate_t)
797 if test x"$have_mbstate_t" = xyes; then
798 AC_DEFINE(HAVE_MBSTATE_T)
801 dnl Sanity check for existence of ISO C99 headers for extended encoding.
802 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
803 AC_CHECK_HEADER(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
805 dnl Only continue checking if the ISO C99 headers exist and support is on.
806 if test x"$ac_has_wchar_h" = xyes && test x"$ac_has_wctype_h" = xyes \
807 && test x"$enable_c_mbchar" != xno; then
809 dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
810 dnl numeric_limits can instantiate type_traits<wchar_t>
811 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
812 AC_TRY_COMPILE([#include <wchar.h>],
813 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
814 has_wchar_minmax=yes, has_wchar_minmax=no)
815 AC_MSG_RESULT($has_wchar_minmax)
817 dnl Test wchar.h for WEOF, which is what we use to determine whether
818 dnl to specialize for char_traits<wchar_t> or not.
819 AC_MSG_CHECKING([for WEOF])
822 #include <stddef.h>],
824 has_weof=yes, has_weof=no)
825 AC_MSG_RESULT($has_weof)
827 dnl Tests for wide character functions used in char_traits<wchar_t>.
829 AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset,, \
832 dnl Checks for names injected into std:: by the c_std headers.
833 AC_CHECK_FUNCS(btowc wctob fgetwc fgetwc fgetws fputwc fputws fwide \
834 fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
835 vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
836 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
837 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
838 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr,, \
841 AC_MSG_CHECKING([for ISO C99 wchar_t support])
842 if test x"$has_weof" = xyes && test x"$has_wchar_minmax" = xyes \
843 && test x"$ac_wfuncs" = xyes; then
844 ac_isoC99_wchar_t=yes
848 AC_MSG_RESULT($ac_isoC99_wchar_t)
850 dnl Use iconv for wchar_t to char conversions. As such, check for
851 dnl X/Open Portability Guide, version 2 features (XPG2).
852 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
853 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
855 dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
856 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
858 LIBS="$LIBS $libiconv"
860 AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
861 ac_XPG2funcs=yes, ac_XPG2funcs=no)
865 AC_MSG_CHECKING([for XPG2 wchar_t support])
866 if test x"$ac_has_iconv_h" = xyes && test x"$ac_has_langinfo_h" = xyes \
867 && test x"$ac_XPG2funcs" = xyes; then
872 AC_MSG_RESULT($ac_XPG2_wchar_t)
874 dnl At the moment, only enable wchar_t specializations if all the
875 dnl above support is present.
876 AC_MSG_CHECKING([for enabled wchar_t specializations])
877 if test x"$ac_isoC99_wchar_t" = xyes \
878 && test x"$ac_XPG2_wchar_t" = xyes; then
879 AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
885 dnl Wide characters disabled by the user.
886 AC_MSG_WARN([wchar_t support disabled.])
892 dnl Check for special debugging mode; not for production use.
894 dnl GLIBCPP_ENABLE_DEBUG
895 dnl --enable-debug sets '-ggdb3 -O0'.
896 dnl --disable-debug sets '-g' and whatever optimization options the
897 dnl compiler can handle.
898 dnl + --enable-maintainer-mode automatically defaults this to on.
899 dnl + Perhaps -D/-U of NDEBUG, DEBUG, DEBUG_ASSERT, ...?
900 dnl + Usage: GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
901 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
902 dnl defaults to `no'.
903 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
904 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
906 changequote(<<, >>)dnl
907 << --enable-debug extra debugging, turn off optimization [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
909 [case "${enableval}" in
910 yes) enable_debug=yes ;;
911 no) enable_debug=no ;;
912 *) AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
914 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
916 dnl Option parsed, now set things appropriately
917 case "${enable_debug}" in
919 DEBUG_FLAGS='-O0 -ggdb3'
925 AC_SUBST(DEBUG_FLAGS)
930 dnl Check for "unusual" flags to pass to the compiler while building.
932 dnl GLIBCPP_ENABLE_CXX_FLAGS
933 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
934 dnl experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
935 dnl Somehow this same set of flags must be passed when [re]building
937 dnl --disable-cxx-flags passes nothing.
938 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
939 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
940 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
941 dnl + Usage: GLIBCPP_ENABLE_CXX_FLAGS(default flags)
942 dnl If "default flags" is an empty string (or "none"), the effect is
943 dnl the same as --disable or --enable=no.
944 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
945 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
946 AC_ARG_ENABLE(cxx-flags,
947 changequote(<<, >>)dnl
948 << --enable-cxx-flags=FLAGS pass compiler FLAGS when building library;
949 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
951 [case "x$enableval" in
953 AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
955 enable_cxx_flags='' ;;
957 enable_cxx_flags="$enableval" ;;
959 enable_cxx_flags='GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT')
961 dnl Thinko on my part during design. This kludge is the workaround.
962 if test "$enable_cxx_flags" = "none"; then
966 dnl Run through flags (either default or command-line) and set anything
967 dnl extra (e.g., #defines) that must accompany particular g++ options.
968 if test -n "$enable_cxx_flags"; then
969 for f in $enable_cxx_flags; do
973 *) # and we're trying to pass /what/ exactly?
974 AC_MSG_ERROR([compiler flags start with a -]) ;;
978 EXTRA_CXX_FLAGS="$enable_cxx_flags"
979 AC_SUBST(EXTRA_CXX_FLAGS)
984 dnl Check for which locale library to use: gnu or generic.
986 dnl GLIBCPP_ENABLE_CLOCALE
987 dnl --enable-clocale=gnu sets config/c_locale_gnu.cc and friends
988 dnl --enable-clocale=generic sets config/c_locale_generic.cc and friends
990 dnl default is generic
992 AC_DEFUN(GLIBCPP_ENABLE_CLOCALE, [
993 AC_MSG_CHECKING([for clocale to use])
994 AC_ARG_ENABLE(clocale,
995 [ --enable-clocale enable model for target locale package.
996 --enable-clocale=MODEL use MODEL target-speific locale package. [default=generic]
998 if test x$enable_clocale = xno; then
999 enable_clocale=generic
1001 enable_clocale=generic)
1003 enable_clocale_flag=$enable_clocale
1005 dnl Check if a valid locale package
1006 case x${enable_clocale_flag} in
1008 CLOCALE_H=config/c_locale_gnu.h
1009 CLOCALE_CC=config/c_locale_gnu.cc
1013 CLOCALE_H=config/c_locale_generic.h
1014 CLOCALE_CC=config/c_locale_generic.cc
1015 AC_MSG_RESULT(generic)
1018 echo "$enable_clocale is an unknown locale package" 1>&2
1024 AC_LINK_FILES($CLOCALE_CC, src/c++locale.cc)
1029 dnl Check for which I/O library to use: libio, or something specific.
1031 dnl GLIBCPP_ENABLE_CSTDIO
1032 dnl --enable-cstdio=libio sets config/c_io_libio.h and friends
1034 dnl default is stdio
1036 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1037 AC_MSG_CHECKING([for cstdio to use])
1038 AC_ARG_ENABLE(cstdio,
1039 [ --enable-cstdio enable stdio for target io package.
1040 --enable-cstdio=LIB use LIB target-speific io package. [default=stdio]
1042 if test x$enable_cstdio = xno; then
1045 enable_cstdio=stdio)
1047 enable_cstdio_flag=$enable_cstdio
1049 dnl Check if a valid I/O package
1050 case x${enable_cstdio_flag} in
1052 CSTDIO_H=config/c_io_libio.h
1053 BASIC_FILE_H=config/basic_file_libio.h
1054 BASIC_FILE_CC=config/basic_file_libio.cc
1055 AC_MSG_RESULT(libio)
1057 # see if we are on a system with libio native (ie, linux)
1058 AC_CHECK_HEADER(libio.h, has_libio=yes, has_libio=no)
1060 # Need to check and see what version of glibc is being used. If
1061 # it's not glibc-2.2 or higher, then we'll need to go ahead and
1062 # compile most of libio for linux systems.
1063 if test x$has_libio = x"yes"; then
1066 AC_MSG_CHECKING([for glibc version >= 2.2])
1067 AC_EGREP_CPP([ok], [
1068 #include <features.h>
1069 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1072 ], glibc_satisfactory=yes, glibc_satisfactory=no)
1073 AC_MSG_RESULT($glibc_satisfactory)
1077 # XXX at the moment, admit defeat and force the recompilation
1078 # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1079 glibc_satisfactory=no
1081 if test x$glibc_satisfactory = x"yes"; then
1086 # bkoz XXX need to add checks to enable this
1087 # pme XXX here's a first pass at such a check
1088 if test x$enable_c_mbchar != xno; then
1096 # Using libio, but <libio.h> doesn't exist on the target system. . .
1098 # bkoz XXX need to add checks to enable this
1099 # pme XXX here's a first pass at such a check
1100 if test x$enable_c_mbchar != xno; then
1107 xstdio | x | xno | xnone | xyes)
1109 CSTDIO_H=config/c_io_stdio.h
1110 BASIC_FILE_H=config/basic_file_stdio.h
1111 BASIC_FILE_CC=config/basic_file_stdio.cc
1112 AC_MSG_RESULT(stdio)
1114 # We're not using stdio.
1119 echo "$enable_cstdio is an unknown io package" 1>&2
1124 AC_SUBST(BASIC_FILE_H)
1125 AC_LINK_FILES($BASIC_FILE_CC, src/basic_file.cc)
1127 # 2000-08-04 bkoz hack
1128 CCODECVT_C=config/c_io_libio_codecvt.c
1129 AC_SUBST(CCODECVT_C)
1130 # 2000-08-04 bkoz hack
1132 AM_CONDITIONAL(GLIBCPP_BUILD_LIBIO,
1133 test "$need_libio" = yes || test "$need_wlibio" = yes)
1134 AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1135 AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1136 if test "$need_libio" = yes || test "$need_wlibio" = yes; then
1137 libio_la=../libio/libio.la
1146 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1147 dnl We must stage the required headers so that they will be installed
1148 dnl with the library (unlike libgcc, the STL implementation is provided
1149 dnl solely within headers). Since we must not inject random user-space
1150 dnl macro names into user-provided C++ code, we first stage into <file>-in
1151 dnl and process to <file> with an output command. The reason for a two-
1152 dnl stage process here is to correctly handle $srcdir!=$objdir without
1153 dnl having to write complex code (the sed commands to clean the macro
1154 dnl namespace are complex and fragile enough as it is). We must also
1155 dnl add a relative path so that -I- is supported properly.
1157 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1158 AC_MSG_CHECKING([for thread model used by GCC])
1159 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
1160 AC_MSG_RESULT([$target_thread_file])
1162 if test $target_thread_file != single; then
1163 AC_DEFINE(HAVE_GTHR_DEFAULT)
1164 AC_DEFINE(_GLIBCPP_SUPPORTS_WEAK, __GXX_WEAK__)
1167 glibcpp_thread_h=gthr-$target_thread_file.h
1168 AC_SUBST(glibcpp_thread_h)
1173 dnl Check for exception handling support. If an explicit enable/disable
1174 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1175 dnl target may or may not support call frame exceptions.
1177 dnl GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
1178 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1179 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1181 dnl Define _GLIBCPP_SJLJ_EXCEPTIONS if the compiler is configured for it.
1183 AC_DEFUN(GLIBCPP_ENABLE_SJLJ_EXCEPTIONS, [
1184 AC_MSG_CHECKING([for exception model to use])
1187 AC_ARG_ENABLE(sjlj-exceptions,
1188 [ --enable-sjlj-exceptions force use of builtin_setjmp for exceptions],
1190 [dnl Botheration. Now we've got to detect the exception model.
1191 dnl Link tests against libgcc.a are problematic since -- at least
1192 dnl as of this writing -- we've not been given proper -L bits for
1193 dnl single-tree newlib and libgloss.
1195 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
1196 dnl conftest files before we got a change to grep them first.
1197 cat > conftest.$ac_ext << EOF
1198 [#]line __oline__ "configure"
1207 old_CXXFLAGS="$CXXFLAGS"
1209 if AC_TRY_EVAL(ac_compile); then
1210 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1211 enable_sjlj_exceptions=yes
1212 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1213 enable_sjlj_exceptions=no
1216 CXXFLAGS="$old_CXXFLAGS"
1218 if test x$enable_sjlj_exceptions = xyes; then
1219 AC_DEFINE(_GLIBCPP_SJLJ_EXCEPTIONS, 1,
1220 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1221 ac_exception_model_name=sjlj
1222 elif test x$enable_sjlj_exceptions = xno; then
1223 ac_exception_model_name="call frame"
1225 AC_MSG_ERROR([unable to detect exception model])
1228 AC_MSG_RESULT($ac_exception_model_name)
1233 dnl Check for ISO/IEC 9899:1999 "C99" support.
1235 dnl GLIBCPP_ENABLE_C99
1236 dnl --enable-c99 defines _GLIBCPP_USE_C99
1237 dnl --disable-c99 leaves _GLIBCPP_USE_C99 undefined
1238 dnl + Usage: GLIBCPP_ENABLE_C99[(DEFAULT)]
1239 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1240 dnl defaults to `no'.
1241 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
1243 dnl GLIBCPP_ENABLE_C99
1244 AC_DEFUN(GLIBCPP_ENABLE_C99, [dnl
1245 define([GLIBCPP_ENABLE_C99_DEFAULT], ifelse($1, yes, yes, no))dnl
1248 changequote(<<, >>)dnl
1249 <<--enable-c99 turns on 'ISO/IEC 9899:1999 support' [default=>>GLIBCPP_ENABLE_C99_DEFAULT],
1250 changequote([, ])dnl
1251 [case "$enableval" in
1252 yes) enable_c99=yes ;;
1253 no) enable_c99=no ;;
1254 *) AC_MSG_ERROR([Unknown argument to enable/disable C99]) ;;
1256 enable_c99=GLIBCPP_ENABLE_C99_DEFAULT)dnl
1261 # Check for the existence of <math.h> functions used if C99 is enabled.
1263 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
1264 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
1265 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
1266 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
1267 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
1268 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
1269 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
1270 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
1271 AC_TRY_COMPILE([#include <math.h>],
1272 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
1273 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
1274 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
1275 AC_TRY_COMPILE([#include <math.h>],
1276 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
1277 AC_TRY_COMPILE([#include <math.h>],
1278 [isunordered(0.0,0.0);],, [ac_c99_math=no])
1279 AC_MSG_RESULT($ac_c99_math)
1281 # Check for the existence in <stdio.h> of vscanf, et. al.
1283 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1284 AC_TRY_COMPILE([#include <stdio.h>],
1285 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
1286 AC_TRY_COMPILE([#include <stdio.h>
1288 void foo(char* fmt, ...)
1289 {va_list args; va_start(args, fmt);
1290 vfscanf(stderr, "%i", args);}],
1291 [],, [ac_c99_stdio=no])
1292 AC_TRY_COMPILE([#include <stdio.h>
1294 void foo(char* fmt, ...)
1295 {va_list args; va_start(args, fmt);
1296 vscanf("%i", args);}],
1297 [],, [ac_c99_stdio=no])
1298 AC_TRY_COMPILE([#include <stdio.h>
1300 void foo(char* fmt, ...)
1301 {va_list args; va_start(args, fmt);
1302 vsnprintf(fmt, 0, "%i", args);}],
1303 [],, [ac_c99_stdio=no])
1304 AC_TRY_COMPILE([#include <stdio.h>
1306 void foo(char* fmt, ...)
1307 {va_list args; va_start(args, fmt);
1308 vsscanf(fmt, "%i", args);}],
1309 [],, [ac_c99_stdio=no])
1310 AC_MSG_RESULT($ac_c99_stdio)
1312 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1314 AC_MSG_CHECKING([for lldiv_t declaration])
1315 AC_CACHE_VAL(ac_c99_lldiv_t, [
1316 AC_TRY_COMPILE([#include <stdlib.h>],
1318 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
1320 AC_MSG_RESULT($ac_c99_lldiv_t)
1322 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1323 AC_TRY_COMPILE([#include <stdlib.h>],
1324 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
1325 AC_TRY_COMPILE([#include <stdlib.h>],
1326 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
1327 AC_TRY_COMPILE([#include <stdlib.h>],
1328 [char* tmp; strtoll("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1329 AC_TRY_COMPILE([#include <stdlib.h>],
1330 [char* tmp; strtoull("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1331 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
1332 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
1333 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
1334 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
1335 if test x"$ac_c99_lldiv_t" = x"no"; then
1338 AC_MSG_RESULT($ac_c99_stdlib)
1340 # Check for the existence of <wchar.h> functions used if C99 is enabled.
1341 # XXX the wchar.h checks should be rolled into the general C99 bits.
1343 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
1344 AC_TRY_COMPILE([#include <wchar.h>],
1345 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
1346 AC_TRY_COMPILE([#include <wchar.h>],
1347 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
1348 AC_TRY_COMPILE([#include <wchar.h>],
1349 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
1350 AC_MSG_RESULT($ac_c99_wchar)
1352 AC_MSG_CHECKING([for enabled ISO C99 support])
1353 if test x"$ac_c99_math" = x"no" || test x"$ac_c99_stdio" = x"no" \
1354 || test x"$ac_c99_stdlib" = x"no" \
1355 || test x"$ac_c99_wchar" = x"no"; then
1358 AC_MSG_RESULT($enable_c99)
1360 # Option parsed, now set things appropriately
1361 if test x"$enable_c99" = x"yes"; then
1362 AC_DEFINE(_GLIBCPP_USE_C99)
1370 dnl Check for template specializations for the 'long long' type extension.
1371 dnl NB: Must check for C99 support before calling _GLIBCPP_ENABLE_LONG_LONG
1373 dnl GLIBCPP_ENABLE_LONG_LONG
1374 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1375 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1376 dnl + Usage: GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1377 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1378 dnl defaults to `no'.
1379 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1381 dnl GLIBCPP_ENABLE_LONG_LONG
1382 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1383 define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1385 AC_ARG_ENABLE(long-long,
1386 changequote(<<, >>)dnl
1387 <<--enable-long-long turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1388 changequote([, ])dnl
1389 [case "$enableval" in
1390 yes) enable_long_long=yes ;;
1391 no) enable_long_long=no ;;
1392 *) AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1394 enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1396 # iostreams require strtoll, strtoull to compile. If the
1397 # GLIBCPP_ENABLE_C99 tests found these, and if C99 support is enabled,
1398 # go ahead and allow long long to be used.
1399 if test x"$enable_c99" = x"no"; then
1400 enable_long_long=no;
1403 # Option parsed, now set things appropriately
1404 AC_MSG_CHECKING([for enabled long long support])
1405 if test x"$enable_long_long" = xyes; then
1406 AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1408 AC_MSG_RESULT($enable_long_long)
1413 dnl Check for what kind of C headers to use.
1415 dnl GLIBCPP_ENABLE_CHEADERS
1416 dnl --enable-cheaders= [does stuff].
1417 dnl --disable-cheaders [does not do anything, really].
1418 dnl + This will eventually need to be 'c_shadow' by default.
1419 dnl + Usage: GLIBCPP_ENABLE_CHEADERS[(DEFAULT)]
1420 dnl Where DEFAULT is either `c' or `c_std' or 'c_shadow'.
1421 dnl If ommitted, it defaults to `c_std'.
1422 AC_DEFUN(GLIBCPP_ENABLE_CHEADERS, [dnl
1423 define([GLIBCPP_ENABLE_CHEADERS_DEFAULT], ifelse($1, c_std, c_std, c_std))dnl
1424 AC_MSG_CHECKING([for c header strategy to use])
1425 AC_ARG_ENABLE(cheaders,
1426 changequote(<<, >>)dnl
1427 << --enable-cheaders construct "C" header files for g++ [default=>>GLIBCPP_ENABLE_CHEADERS_DEFAULT],
1429 [case "$enableval" in
1434 enable_cheaders=c_std
1437 enable_cheaders=c_shadow
1439 *) AC_MSG_ERROR([Unknown argument to enable/disable "C" headers])
1442 enable_cheaders=GLIBCPP_ENABLE_CHEADERS_DEFAULT)
1443 AC_MSG_RESULT($enable_cheaders)
1445 dnl Option parsed, now set things appropriately
1446 case "$enable_cheaders" in
1448 CSHADOW_FLAGS="-fno-builtin"
1449 C_INCLUDE_DIR='${glibcpp_srcdir}/include/c_shadow'
1450 AC_DEFINE(_GLIBCPP_USE_SHADOW_HEADERS)
1454 C_INCLUDE_DIR='${glibcpp_srcdir}/include/c_std'
1458 C_INCLUDE_DIR='${glibcpp_srcdir}/include/c'
1462 AC_SUBST(CSHADOW_FLAGS)
1463 AC_SUBST(C_INCLUDE_DIR)
1464 AM_CONDITIONAL(GLIBCPP_USE_CSHADOW, test "$enable_cheaders" = c_shadow)
1469 dnl Check for wide character support. Has the same effect as the option
1470 dnl in gcc's configure, but in a form that autoconf can mess with.
1472 dnl GLIBCPP_ENABLE_C_MBCHAR
1473 dnl --enable-c-mbchar requests all the wchar_t stuff.
1474 dnl --disable-c-mbchar doesn't.
1475 dnl + Usage: GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1476 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1477 dnl defaults to `no'.
1478 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1479 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1480 AC_ARG_ENABLE(c-mbchar,
1481 changequote(<<, >>)dnl
1482 << --enable-c-mbchar enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1483 changequote([, ])dnl
1484 [case "$enableval" in
1485 yes) enable_c_mbchar=yes ;;
1486 no) enable_c_mbchar=no ;;
1487 *) AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1489 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1490 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1495 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1497 dnl TOPLEVEL_INCLUDES
1498 dnl LIBMATH_INCLUDES
1499 dnl LIBSUPCXX_INCLUDES
1501 dnl CSHADOW_INCLUDES
1503 dnl GLIBCPP_EXPORT_INCLUDES
1504 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1505 # Root level of the build directory include sources.
1506 GLIBCPP_INCLUDES="-I${glibcpp_builddir}/include/${target_alias} -I${glibcpp_builddir}/include"
1508 # Passed down for canadian crosses.
1509 if test x"$CANADIAN" = xyes; then
1510 TOPLEVEL_INCLUDES='-I$(includedir)'
1513 LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1515 LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1517 if test x"$need_libio" = xyes; then
1518 LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1519 AC_SUBST(LIBIO_INCLUDES)
1522 # Now, export this to all the little Makefiles....
1523 AC_SUBST(GLIBCPP_INCLUDES)
1524 AC_SUBST(TOPLEVEL_INCLUDES)
1525 AC_SUBST(LIBMATH_INCLUDES)
1526 AC_SUBST(LIBSUPCXX_INCLUDES)
1531 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1533 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1534 # Optimization flags that are probably a good idea for thrill-seekers. Just
1535 # uncomment the lines below and make, everything else is ready to go...
1536 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1538 AC_SUBST(OPTIMIZE_CXXFLAGS)
1540 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings -Winline'
1541 AC_SUBST(WARN_FLAGS)
1545 dnl GLIBCPP_EXPORT_INSTALL_INFO
1546 dnl calculates gxx_install_dir
1547 dnl exports glibcpp_toolexecdir
1548 dnl exports glibcpp_toolexeclibdir
1549 dnl exports glibcpp_builddir
1550 dnl exports glibcpp_srcdir
1551 dnl exports glibcpp_prefixdir
1553 dnl Assumes cross_compiling bits already done, and with_cross_host in
1556 dnl GLIBCPP_EXPORT_INSTALL_INFO
1557 AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [
1559 glibcpp_toolexecdir=no
1560 glibcpp_toolexeclibdir=no
1562 # Export build and source directories.
1563 # These need to be absolute paths, yet at the same time need to
1564 # canonicalize only relative paths, because then amd will not unmount
1565 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
1566 glibcpp_builddir=`pwd`
1568 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
1569 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
1571 glibcpp_prefixdir=${prefix}
1573 AC_MSG_CHECKING([for interface version number])
1574 libstdcxx_interface=$INTERFACE
1575 AC_MSG_RESULT($libstdcxx_interface)
1577 # Process the option --with-gxx-include-dir=<path to include-files directory>
1578 AC_MSG_CHECKING([for --with-gxx-include-dir])
1579 AC_ARG_WITH(gxx-include-dir,
1580 [ --with-gxx-include-dir the installation directory for include files],
1581 [case "${withval}" in
1583 AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
1590 gxx_include_dir=${withval}
1592 esac], [gxx_include_dir=no])
1593 AC_MSG_RESULT($gxx_include_dir)
1595 # Process the option "--enable-version-specific-runtime-libs"
1596 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
1597 AC_ARG_ENABLE(version-specific-runtime-libs,
1598 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
1599 [case "$enableval" in
1600 yes) version_specific_libs=yes ;;
1601 no) version_specific_libs=no ;;
1602 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
1604 version_specific_libs=no)dnl
1605 # Option set, now we can test it.
1606 AC_MSG_RESULT($version_specific_libs)
1608 if test $version_specific_libs = yes; then
1609 # Need the gcc compiler version to know where to install libraries
1610 # and header files if --enable-version-specific-runtime-libs option
1613 gcc_version_trigger=${srcdir}/../gcc/version.c
1614 gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([^\"]*\)\".*/\1/'`
1615 gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
1616 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/g++
1617 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1618 glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)'
1622 # Default case for install directory for include files.
1623 if test $version_specific_libs = no &&
1624 test $gxx_include_dir = no; then
1625 gxx_include_dir='$(prefix)'/include/g++-${libstdcxx_interface}
1628 # Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir
1629 # Install a library built with a cross compiler in tooldir, not libdir.
1630 if test x"$glibcpp_toolexecdir" = x"no"; then
1631 if test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
1632 glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)'
1633 glibcpp_toolexeclibdir='$(toolexecdir)/lib$(MULTISUBDIR)'
1635 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1636 glibcpp_toolexeclibdir='$(libdir)$(MULTISUBDIR)'
1640 AC_MSG_CHECKING([for install location])
1641 AC_MSG_RESULT($gxx_include_dir)
1643 AC_SUBST(glibcpp_builddir)
1644 AC_SUBST(glibcpp_srcdir)
1645 AC_SUBST(glibcpp_prefixdir)
1646 AC_SUBST(gxx_include_dir)
1647 AC_SUBST(glibcpp_toolexecdir)
1648 AC_SUBST(glibcpp_toolexeclibdir)
1652 # Check whether LC_MESSAGES is available in <locale.h>.
1653 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1655 # This file file be copied and used freely without restrictions. It can
1656 # be used in projects which are not available under the GNU Public License
1657 # but which still want to provide support for the GNU gettext functionality.
1658 # Please note that the actual code is *not* freely available.
1662 AC_DEFUN(AC_LC_MESSAGES, [
1663 AC_CHECK_HEADER(locale.h, [
1664 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1665 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1666 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1667 if test $ac_cv_val_LC_MESSAGES = yes; then
1668 AC_DEFINE(HAVE_LC_MESSAGES)
1674 # Check for functions in math library.
1675 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1677 # This file can be copied and used freely without restrictions. It can
1678 # be used in projects which are not available under the GNU Public License
1679 # but which still want to provide support for the GNU gettext functionality.
1680 # Please note that the actual code is *not* freely available.
1684 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1685 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1686 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])
1687 AC_SUBST(LIBMATHOBJS)dnl
1691 # Check for string functions.
1692 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1694 # This file can be copied and used freely without restrictions. It can
1695 # be used in projects which are not available under the GNU Public License
1696 # but which still want to provide support for the GNU gettext functionality.
1697 # Please note that the actual code is *not* freely available.
1701 dnl AC_REPLACE_STRINGFUNCS(FUNCTION...)
1702 AC_DEFUN(AC_REPLACE_STRINGFUNCS,
1703 [AC_CHECK_FUNCS([$1], , [LIBSTRINGOBJS="$LIBSTRINGOBJS ${ac_func}.lo"])
1704 AC_SUBST(LIBSTRINGOBJS)dnl
1708 dnl This macro searches for a GNU version of make. If a match is found, the
1709 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1710 dnl set to "#". This is useful for including a special features in a Makefile,
1711 dnl which cannot be handled by other versions of make. The variable
1712 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1713 dnl the empty string otherwise.
1715 dnl Here is an example of its use:
1717 dnl Makefile.in might contain:
1719 dnl # A failsafe way of putting a dependency rule into a makefile
1721 dnl $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1723 dnl @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1724 dnl @ifGNUmake@ include $(DEPEND)
1725 dnl @ifGNUmake@ endif
1727 dnl Then configure.in would normally contain:
1729 dnl CHECK_GNU_MAKE()
1730 dnl AC_OUTPUT(Makefile)
1732 dnl Then perhaps to cause gnu make to override any other make, we could do
1733 dnl something like this (note that GNU make always looks for GNUmakefile first):
1735 dnl if ! test x$_cv_gnu_make_command = x ; then
1736 dnl mv Makefile GNUmakefile
1737 dnl echo .DEFAULT: > Makefile ;
1738 dnl echo \ $_cv_gnu_make_command \$@ >> Makefile;
1741 dnl Then, if any (well almost any) other make is called, and GNU make also
1742 dnl exists, then the other make wraps the GNU make.
1744 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1745 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1747 dnl #### Changes for libstdc++-v3: reformatting and linewrapping; prepending
1748 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1749 dnl #### conditional's subshell (" --version" is not a command), using a
1750 dnl #### different option to grep(1).
1752 dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not
1753 dnl #### ${MAKE:-make}).
1756 GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
1757 _cv_gnu_make_command='' ;
1758 dnl Search all the common names for GNU make
1759 for a in "${MAKE-make}" make gmake gnumake ; do
1760 if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
1762 _cv_gnu_make_command=$a ;
1767 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
1768 dnl string, '#' otherwise
1769 if test "x$_cv_gnu_make_command" != "x" ; then
1778 dnl Check for headers for, and arguments to, the setrlimit() function.
1779 dnl Used only in testsuite_hooks.h.
1780 AC_DEFUN(GLIBCPP_CHECK_SETRLIMIT_ancilliary, [
1781 AC_TRY_COMPILE([#include <sys/resource.h>
1783 ], [ int f = RLIMIT_$1 ; ],
1784 [glibcpp_mresult=1], [glibcpp_mresult=0])
1785 AC_DEFINE_UNQUOTED(HAVE_MEMLIMIT_$1, $glibcpp_mresult,
1786 [Only used in build directory testsuite_hooks.h.])
1788 AC_DEFUN(GLIBCPP_CHECK_SETRLIMIT, [
1789 setrlimit_have_headers=yes
1790 AC_CHECK_HEADERS(sys/resource.h unistd.h,
1792 setrlimit_have_headers=no)
1793 # If don't have the headers, then we can't run the tests now, and we
1794 # won't be seeing any of these during testsuite compilation.
1795 if test $setrlimit_have_headers = yes; then
1796 # Can't do these in a loop, else the resulting syntax is wrong.
1797 GLIBCPP_CHECK_SETRLIMIT_ancilliary(DATA)
1798 GLIBCPP_CHECK_SETRLIMIT_ancilliary(RSS)
1799 GLIBCPP_CHECK_SETRLIMIT_ancilliary(VMEM)
1800 GLIBCPP_CHECK_SETRLIMIT_ancilliary(AS)
1802 # Check for rlimit, setrlimit.
1803 AC_CACHE_VAL(ac_setrlimit, [
1804 AC_TRY_COMPILE([#include <sys/resource.h>
1807 [ struct rlimit r; setrlimit(0, &r);],
1808 [ac_setrlimit=yes], [ac_setrlimit=no])
1812 AC_MSG_CHECKING([for testsuite memory limit support])
1813 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
1815 AC_DEFINE(_GLIBCPP_MEM_LIMITS)
1819 AC_MSG_RESULT($ac_mem_limits)
1824 dnl Does any necessary configuration of the testsuite directory. Generates
1825 dnl the testsuite_hooks.h header.
1827 dnl GLIBCPP_CONFIGURE_TESTSUITE [no args]
1828 AC_DEFUN(GLIBCPP_CONFIGURE_TESTSUITE, [
1829 GLIBCPP_CHECK_SETRLIMIT
1833 sinclude(../libtool.m4)
1834 dnl The lines below arrange for aclocal not to bring an installed
1835 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1836 dnl add a definition of LIBTOOL to Makefile.in.
1837 ifelse(,,,[AC_SUBST(LIBTOOL)
1838 AC_DEFUN([AM_PROG_LIBTOOL])
1839 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1840 AC_DEFUN([AC_PROG_LD])
1845 # Do all the work for Automake. This macro actually does too much --
1846 # some checks are only needed if your package does certain things.
1847 # But this isn't really a big deal.
1852 dnl AM_INIT_AUTOMAKE(package,version, [no-define])
1854 AC_DEFUN(AM_INIT_AUTOMAKE,
1855 [AC_REQUIRE([AC_PROG_INSTALL])
1860 dnl test to see if srcdir already configured
1861 if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
1862 AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
1865 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of package])
1866 AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version number of package]))
1867 AC_REQUIRE([AM_SANITY_CHECK])
1868 AC_REQUIRE([AC_ARG_PROGRAM])
1869 dnl FIXME This is truly gross.
1870 missing_dir=`cd $ac_aux_dir && pwd`
1871 AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
1872 AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
1873 AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
1874 AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
1875 AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
1876 AC_REQUIRE([AC_PROG_MAKE_SET])])
1879 # Check to make sure that the build environment is sane.
1882 AC_DEFUN(AM_SANITY_CHECK,
1883 [AC_MSG_CHECKING([whether build environment is sane])
1886 echo timestamp > conftestfile
1887 # Do `set' in a subshell so we don't clobber the current shell's
1888 # arguments. Must try -L first in case configure is actually a
1889 # symlink; some systems play weird games with the mod time of symlinks
1890 # (eg FreeBSD returns the mod time of the symlink's containing
1893 set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
1894 if test "[$]*" = "X"; then
1896 set X `ls -t $srcdir/configure conftestfile`
1898 if test "[$]*" != "X $srcdir/configure conftestfile" \
1899 && test "[$]*" != "X conftestfile $srcdir/configure"; then
1901 # If neither matched, then we have a broken ls. This can happen
1902 # if, for instance, CONFIG_SHELL is bash and it inherits a
1903 # broken ls alias from the environment. This has actually
1904 # happened. Such a system could not be considered "sane".
1905 AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
1906 alias in your environment])
1909 test "[$]2" = conftestfile
1915 AC_MSG_ERROR([newly created file is older than distributed files!
1916 Check your system clock])
1919 AC_MSG_RESULT(yes)])
1921 dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
1922 dnl The program must properly implement --version.
1923 AC_DEFUN(AM_MISSING_PROG,
1924 [AC_MSG_CHECKING(for working $2)
1925 # Run test in a subshell; some versions of sh will print an error if
1926 # an executable is not found, even if stderr is redirected.
1927 # Redirect stdin to placate older versions of autoconf. Sigh.
1928 if ($2 --version) < /dev/null > /dev/null 2>&1; then
1930 AC_MSG_RESULT(found)
1933 AC_MSG_RESULT(missing)
1937 # Add --enable-maintainer-mode option to configure.
1942 AC_DEFUN(AM_MAINTAINER_MODE,
1943 [AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
1944 dnl maintainer-mode is disabled by default
1945 AC_ARG_ENABLE(maintainer-mode,
1946 [ --enable-maintainer-mode enable make rules and dependencies not useful
1947 (and sometimes confusing) to the casual installer],
1948 USE_MAINTAINER_MODE=$enableval,
1949 USE_MAINTAINER_MODE=no)
1950 AC_MSG_RESULT($USE_MAINTAINER_MODE)
1951 AM_CONDITIONAL(MAINTAINER_MODE, test $USE_MAINTAINER_MODE = yes)
1952 MAINT=$MAINTAINER_MODE_TRUE
1957 # Define a conditional.
1959 AC_DEFUN(AM_CONDITIONAL,
1970 # Like AC_CONFIG_HEADER, but automatically create stamp file.
1972 AC_DEFUN(AM_CONFIG_HEADER,
1974 AC_CONFIG_HEADER([$1])
1975 dnl When config.status generates a header, we must update the stamp-h file.
1976 dnl This file resides in the same directory as the config header
1977 dnl that is generated. We must strip everything past the first ":",
1978 dnl and everything past the last "/".
1979 AC_OUTPUT_COMMANDS(changequote(<<,>>)dnl
1980 ifelse(patsubst(<<$1>>, <<[^ ]>>, <<>>), <<>>,
1981 <<test -z "<<$>>CONFIG_HEADERS" || echo timestamp > patsubst(<<$1>>, <<^\([^:]*/\)?.*>>, <<\1>>)stamp-h<<>>dnl>>,
1983 for am_file in <<$1>>; do
1984 case " <<$>>CONFIG_HEADERS " in
1985 *" <<$>>am_file "*<<)>>
1986 echo timestamp > `echo <<$>>am_file | sed -e 's%:.*%%' -e 's%[^/]*$%%'`stamp-h$am_indx
1989 am_indx=`expr "<<$>>am_indx" + 1`