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"$ac_fdsections" = x"yes" &&
225 test x"$enable_debug" = x"no"; then
226 SECTION_FLAGS='-ffunction-sections -fdata-sections'
228 AC_MSG_RESULT($ac_fdsections)
232 AC_SUBST(SECTION_FLAGS)
237 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
238 dnl the native linker is in use, all variables will be defined to something
239 dnl safe (like an empty string).
241 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
242 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
244 dnl GLIBCPP_CHECK_LINKER_FEATURES
245 AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [
246 # If we're not using GNU ld, then there's no point in even trying these
247 # tests. Check for that first. We should have already tested for gld
248 # by now (in libtool), but require it now just to be safe...
251 AC_REQUIRE([AC_PROG_LD])
254 if test "$ac_cv_prog_gnu_ld" = "notbroken"; then
255 # GNU ld it is! Joy and bunny rabbits!
257 # All these tests are for C++; save the language and the compiler flags.
258 # Need to do this so that g++ won't try to link in libstdc++
259 ac_test_CFLAGS="${CFLAGS+set}"
260 ac_save_CFLAGS="$CFLAGS"
261 CFLAGS='-x c++ -Wl,--gc-sections'
263 # Check for -Wl,--gc-sections
264 # XXX This test is broken at the moment, as symbols required for
265 # linking are now in libsupc++ (not built yet.....). In addition,
266 # this test has cored on solaris in the past. In addition,
267 # --gc-sections doesn't really work at the moment (keeps on discarding
268 # used sections, first .eh_frame and now some of the glibc sections for
269 # iconv). Bzzzzt. Thanks for playing, maybe next time.
270 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
278 ], [ac_sectionLDflags=yes],[ac_sectionLFflags=no], [ac_sectionLDflags=yes])
279 if test "$ac_test_CFLAGS" = set; then
280 CFLAGS="$ac_save_CFLAGS"
282 # this is the suspicious part
285 if test "$ac_sectionLDflags" = "yes"; then
286 SECTION_LDFLAGS='-Wl,--gc-sections'
288 AC_MSG_RESULT($ac_sectionLDflags)
291 # Set linker optimization flags.
292 if test x"$ac_cv_prog_gnu_ld" = x"yes" &&
293 test x"$enable_debug" = x"no"; then
294 OPT_LDFLAGS='-Wl,-O1'
297 AC_SUBST(SECTION_LDFLAGS)
298 AC_SUBST(OPT_LDFLAGS)
303 dnl Check to see if the (math function) argument passed is
304 dnl declared when using the c++ compiler
305 dnl ASSUMES argument is a math function with ONE parameter
307 dnl GLIBCPP_CHECK_MATH_DECL_1
308 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_1, [
309 AC_MSG_CHECKING([for $1 declaration])
310 if test x${glibcpp_cv_func_$1_use+set} != xset; then
311 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
314 AC_TRY_COMPILE([#include <math.h>
320 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
324 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
328 dnl Check to see if the (math function) argument passed is
329 dnl 1) declared when using the c++ compiler
330 dnl 2) has "C" linkage
331 dnl 3) if not, see if 1) and 2) for argument prepended with '_'
333 dnl Define HAVE_CARGF etc if "cargf" is declared and links
335 dnl argument 1 is name of function to check
337 dnl ASSUMES argument is a math function with ONE parameter
339 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1
340 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, [
341 GLIBCPP_CHECK_MATH_DECL_1($1)
342 if test x$glibcpp_cv_func_$1_use = x"yes"; then
345 GLIBCPP_CHECK_MATH_DECL_1(_$1)
346 if test x$glibcpp_cv_func__$1_use = x"yes"; then
354 dnl Like GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, but does a bunch of
355 dnl of functions at once. It's an all-or-nothing check -- either
356 dnl HAVE_XYZ is defined for each of the functions, or for none of them.
357 dnl Doing it this way saves significant configure time.
358 AC_DEFUN(GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1, [
359 AC_MSG_CHECKING([for $1 functions])
360 AC_CACHE_VAL(glibcpp_cv_func_$2_use, [
363 AC_TRY_COMPILE([#include <math.h>],
364 [ `for x in $3; do echo "$x (0);"; done` ],
365 [glibcpp_cv_func_$2_use=yes],
366 [glibcpp_cv_func_$2_use=no])
368 AC_MSG_RESULT($glibcpp_cv_func_$2_use)
369 if test x$glibcpp_cv_func_$2_use = x"yes"; then
375 dnl Check to see if the (math function) argument passed is
376 dnl declared when using the c++ compiler
377 dnl ASSUMES argument is a math function with TWO parameters
379 dnl GLIBCPP_CHECK_MATH_DECL_2
380 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_2, [
381 AC_MSG_CHECKING([for $1 declaration])
382 if test x${glibcpp_cv_func_$1_use+set} != xset; then
383 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
386 AC_TRY_COMPILE([#include <math.h>],
388 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
392 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
396 dnl Check to see if the (math function) argument passed is
397 dnl 1) declared when using the c++ compiler
398 dnl 2) has "C" linkage
400 dnl Define HAVE_CARGF etc if "cargf" is declared and links
402 dnl argument 1 is name of function to check
404 dnl ASSUMES argument is a math function with TWO parameters
406 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2
407 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2, [
408 GLIBCPP_CHECK_MATH_DECL_2($1)
409 if test x$glibcpp_cv_func_$1_use = x"yes"; then
412 GLIBCPP_CHECK_MATH_DECL_2(_$1)
413 if test x$glibcpp_cv_func__$1_use = x"yes"; then
421 dnl Check to see if the (math function) argument passed is
422 dnl declared when using the c++ compiler
423 dnl ASSUMES argument is a math function with THREE parameters
425 dnl GLIBCPP_CHECK_MATH_DECL_3
426 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_3, [
427 AC_MSG_CHECKING([for $1 declaration])
428 if test x${glibcpp_cv_func_$1_use+set} != xset; then
429 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
432 AC_TRY_COMPILE([#include <math.h>],
434 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
438 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
442 dnl Check to see if the (math function) argument passed is
443 dnl 1) declared when using the c++ compiler
444 dnl 2) has "C" linkage
446 dnl Define HAVE_CARGF etc if "cargf" is declared and links
448 dnl argument 1 is name of function to check
450 dnl ASSUMES argument is a math function with THREE parameters
452 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3
453 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3, [
454 GLIBCPP_CHECK_MATH_DECL_3($1)
455 if test x$glibcpp_cv_func_$1_use = x"yes"; then
458 GLIBCPP_CHECK_MATH_DECL_3(_$1)
459 if test x$glibcpp_cv_func__$1_use = x"yes"; then
467 dnl Check to see if the (stdlib function) argument passed is
468 dnl 1) declared when using the c++ compiler
469 dnl 2) has "C" linkage
471 dnl argument 1 is name of function to check
473 dnl ASSUMES argument is a math function with TWO parameters
475 dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2
476 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
477 AC_MSG_CHECKING([for $1 declaration])
478 if test x${glibcpp_cv_func_$1_use+set} != xset; then
479 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
482 AC_TRY_COMPILE([#include <stdlib.h>],
484 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
488 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
489 if test x$glibcpp_cv_func_$1_use = x"yes"; then
496 dnl Because the builtins are picky picky picky about the arguments they take,
497 dnl do an explict linkage tests here.
498 dnl Check to see if the (math function) argument passed is
499 dnl 1) declared when using the c++ compiler
500 dnl 2) has "C" linkage
502 dnl Define HAVE_CARGF etc if "cargf" is declared and links
504 dnl argument 1 is name of function to check
506 dnl ASSUMES argument is a math function with ONE parameter
508 dnl GLIBCPP_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
509 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
510 AC_MSG_CHECKING([for $1 declaration])
511 if test x${glibcpp_cv_func_$1_use+set} != xset; then
512 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
515 AC_TRY_COMPILE([#include <math.h>],
517 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
521 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
522 if test x$glibcpp_cv_func_$1_use = x"yes"; then
523 AC_MSG_CHECKING([for $1 linkage])
524 if test x${glibcpp_cv_func_$1_link+set} != xset; then
525 AC_CACHE_VAL(glibcpp_cv_func_$1_link, [
526 AC_TRY_LINK([#include <math.h>],
528 [glibcpp_cv_func_$1_link=yes], [glibcpp_cv_func_$1_link=no])
531 AC_MSG_RESULT($glibcpp_cv_func_$1_link)
532 if test x$glibcpp_cv_func_$1_link = x"yes"; then
533 ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
534 AC_DEFINE_UNQUOTED(${ac_tr_func})
541 dnl Check to see what builtin math functions are supported
543 dnl check for __builtin_abs
544 dnl check for __builtin_fabsf
545 dnl check for __builtin_fabs
546 dnl check for __builtin_fabl
547 dnl check for __builtin_labs
548 dnl check for __builtin_sqrtf
549 dnl check for __builtin_sqrtl
550 dnl check for __builtin_fsqrt
551 dnl check for __builtin_sinf
552 dnl check for __builtin_sin
553 dnl check for __builtin_sinl
554 dnl check for __builtin_cosf
555 dnl check for __builtin_cos
556 dnl check for __builtin_cosl
558 dnl GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
559 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT, [
560 dnl Test for builtin math functions.
561 dnl These are made in gcc/c-common.c
562 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
563 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
564 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
565 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
566 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
568 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
569 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fsqrt)
570 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
572 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
573 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
574 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
576 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
577 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
578 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
580 dnl There is, without a doubt, a more elegant way to have these
581 dnl names exported so that they won't be stripped out of acconfig.h by
582 dnl autoheader. I leave this as an exercise to somebody less frustrated
583 dnl than I.... please email the libstdc++ list if you can figure out a
584 dnl more elegant approach (see autoconf/acgen.m4 and specifically
585 dnl AC_CHECK_FUNC for things to steal.)
587 if test x$dummyvar = x"yes"; then
588 AC_DEFINE(HAVE___BUILTIN_ABS)
589 AC_DEFINE(HAVE___BUILTIN_LABS)
590 AC_DEFINE(HAVE___BUILTIN_COS)
591 AC_DEFINE(HAVE___BUILTIN_COSF)
592 AC_DEFINE(HAVE___BUILTIN_COSL)
593 AC_DEFINE(HAVE___BUILTIN_FABS)
594 AC_DEFINE(HAVE___BUILTIN_FABSF)
595 AC_DEFINE(HAVE___BUILTIN_FABSL)
596 AC_DEFINE(HAVE___BUILTIN_SIN)
597 AC_DEFINE(HAVE___BUILTIN_SINF)
598 AC_DEFINE(HAVE___BUILTIN_SINL)
599 AC_DEFINE(HAVE___BUILTIN_FSQRT)
600 AC_DEFINE(HAVE___BUILTIN_SQRTF)
601 AC_DEFINE(HAVE___BUILTIN_SQRTL)
607 dnl Check to see what the underlying c library
608 dnl These checks need to do two things:
609 dnl 1) make sure the name is declared when using the c++ compiler
610 dnl 2) make sure the name has "C" linkage
611 dnl This might seem like overkill but experience has shown that it's not...
613 dnl Define HAVE_STRTOLD if "strtold" is declared and links
614 dnl Define HAVE_STRTOF if "strtof" is declared and links
615 dnl Define HAVE_DRAND48 if "drand48" is declared and links
617 dnl GLIBCPP_CHECK_STDLIB_SUPPORT
618 AC_DEFUN(GLIBCPP_CHECK_STDLIB_SUPPORT, [
619 ac_test_CXXFLAGS="${CXXFLAGS+set}"
620 ac_save_CXXFLAGS="$CXXFLAGS"
621 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
623 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
624 AC_CHECK_FUNCS(drand48)
626 CXXFLAGS="$ac_save_CXXFLAGS"
631 dnl Check to see what the underlying c library or math library is like.
632 dnl These checks need to do two things:
633 dnl 1) make sure the name is declared when using the c++ compiler
634 dnl 2) make sure the name has "C" linkage
635 dnl This might seem like overkill but experience has shown that it's not...
637 dnl Define HAVE_CARGF etc if "cargf" is found.
639 dnl GLIBCPP_CHECK_MATH_SUPPORT
640 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
641 ac_test_CXXFLAGS="${CXXFLAGS+set}"
642 ac_save_CXXFLAGS="$CXXFLAGS"
643 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
646 AC_CHECK_LIB(m, sin, libm="-lm")
650 dnl Check to see if certain C math functions exist.
651 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
652 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
653 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
654 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
655 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
656 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
657 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
659 dnl Check to see if basic C math functions have float versions.
660 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
665 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
668 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
669 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
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(ldexpf)
674 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
675 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
676 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
677 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
678 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
679 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
680 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
682 dnl Check to see if basic C math functions have long double versions.
683 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
688 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
691 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
692 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
693 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
694 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
695 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
696 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
697 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
698 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
699 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
700 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
701 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
702 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
703 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
704 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
705 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
706 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
708 dnl Some runtimes have these functions with a preceding underscore. Please
709 dnl keep this sync'd with the one above. And if you add any new symbol,
710 dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
711 dnl Check to see if certain C math functions exist.
713 dnl Check to see if basic C math functions have float versions.
714 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig,
716 _acosf _asinf _atanf \
718 _coshf _sinhf _tanhf)
719 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round,
723 dnl Check to see if basic C math functions have long double versions.
724 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig,
726 _acosl _asinl _atanl \
728 _coshl _sinhl _tanhl)
729 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round,
734 CXXFLAGS="$ac_save_CXXFLAGS"
739 dnl Check to see if there is native support for complex
741 dnl Don't compile bits in math/* if native support exits.
743 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "atan2l/copysignl" is found.
745 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
746 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
747 dnl Check for complex versions of math functions of platform.
748 AC_CHECK_LIB(m, main)
749 AC_REPLACE_MATHFUNCS(nan hypot hypotf atan2f expf copysignf)
751 dnl Compile the long double complex functions only if the function
752 dnl provides the non-complex long double functions that are needed.
753 dnl Currently this includes copysignl and atan2l, which should be
754 dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
755 USE_COMPLEX_LONG_DOUBLE=no
756 if test x$ac_cv_func_atan2l = x"yes" &&
757 test x$ac_cv_func_copysignl = x"yes"; then
758 USE_COMPLEX_LONG_DOUBLE=yes
759 AC_REPLACE_MATHFUNCS(hypotl signbitl)
762 AC_SUBST(USE_COMPLEX_LONG_DOUBLE)
766 dnl Check to see what architecture and operating system we are compiling
767 dnl for. Also, if architecture- or OS-specific flags are required for
768 dnl compilation, pick them up here.
770 dnl GLIBCPP_CHECK_TARGET
771 AC_DEFUN(GLIBCPP_CHECK_TARGET, [
772 . [$]{glibcpp_basedir}/configure.target
773 AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
774 AC_MSG_RESULT(OS config directory is $os_include_dir)
775 AC_LINK_FILES($os_include_dir/bits/os_defines.h, include/bits/os_defines.h)
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"$ac_has_wchar_h" = xyes &&
807 test x"$ac_has_wctype_h" = xyes &&
808 test x"$enable_c_mbchar" != xno; then
810 dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
811 dnl numeric_limits can instantiate type_traits<wchar_t>
812 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
813 AC_TRY_COMPILE([#include <wchar.h>],
814 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
815 has_wchar_minmax=yes, has_wchar_minmax=no)
816 AC_MSG_RESULT($has_wchar_minmax)
818 dnl Test wchar.h for WEOF, which is what we use to determine whether
819 dnl to specialize for char_traits<wchar_t> or not.
820 AC_MSG_CHECKING([for WEOF])
823 #include <stddef.h>],
825 has_weof=yes, has_weof=no)
826 AC_MSG_RESULT($has_weof)
828 dnl Tests for wide character functions used in char_traits<wchar_t>.
830 AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset,, \
833 dnl Checks for names injected into std:: by the c_std headers.
834 AC_CHECK_FUNCS(btowc wctob fgetwc fgetwc fgetws fputwc fputws fwide \
835 fwprintf fwscanf swprintf swscanf vfwprintf vfwscanf vswprintf vswscanf \
836 vwprintf vwscanf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
837 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstof wcstol \
838 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
839 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr,, \
842 AC_MSG_CHECKING([for ISO C99 wchar_t support])
843 if test x"$has_weof" = xyes &&
844 test x"$has_wchar_minmax" = xyes &&
845 test x"$ac_wfuncs" = xyes; then
846 ac_isoC99_wchar_t=yes
850 AC_MSG_RESULT($ac_isoC99_wchar_t)
852 dnl Use iconv for wchar_t to char conversions. As such, check for
853 dnl X/Open Portability Guide, version 2 features (XPG2).
854 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
855 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
857 dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
858 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
860 LIBS="$LIBS $libiconv"
862 AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
863 ac_XPG2funcs=yes, ac_XPG2funcs=no)
867 AC_MSG_CHECKING([for XPG2 wchar_t support])
868 if test x"$ac_has_iconv_h" = xyes &&
869 test x"$ac_has_langinfo_h" = xyes &&
870 test x"$ac_XPG2funcs" = xyes; then
875 AC_MSG_RESULT($ac_XPG2_wchar_t)
877 dnl At the moment, only enable wchar_t specializations if all the
878 dnl above support is present.
879 AC_MSG_CHECKING([for enabled wchar_t specializations])
880 if test x"$ac_isoC99_wchar_t" = xyes &&
881 test x"$ac_XPG2_wchar_t" = xyes; then
882 AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
888 dnl Wide characters disabled by the user.
889 AC_MSG_WARN([wchar_t support disabled.])
895 dnl Check for special debugging mode; not for production use.
897 dnl GLIBCPP_ENABLE_DEBUG
898 dnl --enable-debug sets '-ggdb3 -O0'.
899 dnl --disable-debug sets '-g' and whatever optimization options the
900 dnl compiler can handle.
901 dnl + --enable-maintainer-mode automatically defaults this to on.
902 dnl + Perhaps -D/-U of NDEBUG, DEBUG, DEBUG_ASSERT, ...?
903 dnl + Usage: GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
904 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
905 dnl defaults to `no'.
906 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
907 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
909 changequote(<<, >>)dnl
910 << --enable-debug extra debugging, turn off optimization [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
912 [case "${enableval}" in
913 yes) enable_debug=yes ;;
914 no) enable_debug=no ;;
915 *) AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
917 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
919 dnl Option parsed, now set things appropriately
920 case "${enable_debug}" in
922 DEBUG_FLAGS='-O0 -ggdb3'
928 AC_SUBST(DEBUG_FLAGS)
933 dnl Check for "unusual" flags to pass to the compiler while building.
935 dnl GLIBCPP_ENABLE_CXX_FLAGS
936 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
937 dnl experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
938 dnl Somehow this same set of flags must be passed when [re]building
940 dnl --disable-cxx-flags passes nothing.
941 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
942 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
943 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
944 dnl + Usage: GLIBCPP_ENABLE_CXX_FLAGS(default flags)
945 dnl If "default flags" is an empty string (or "none"), the effect is
946 dnl the same as --disable or --enable=no.
947 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
948 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
949 AC_ARG_ENABLE(cxx-flags,
950 changequote(<<, >>)dnl
951 << --enable-cxx-flags=FLAGS pass compiler FLAGS when building library;
952 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
954 [case "x$enableval" in
956 AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
958 enable_cxx_flags='' ;;
960 enable_cxx_flags="$enableval" ;;
962 enable_cxx_flags='GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT')
964 dnl Thinko on my part during design. This kludge is the workaround.
965 if test "$enable_cxx_flags" = "none"; then
969 dnl Run through flags (either default or command-line) and set anything
970 dnl extra (e.g., #defines) that must accompany particular g++ options.
971 if test -n "$enable_cxx_flags"; then
972 for f in $enable_cxx_flags; do
976 *) # and we're trying to pass /what/ exactly?
977 AC_MSG_ERROR([compiler flags start with a -]) ;;
981 EXTRA_CXX_FLAGS="$enable_cxx_flags"
982 AC_SUBST(EXTRA_CXX_FLAGS)
987 dnl Check for which locale library to use: gnu or generic.
989 dnl GLIBCPP_ENABLE_CLOCALE
990 dnl --enable-clocale=gnu sets config/c_locale_gnu.cc and friends
991 dnl --enable-clocale=generic sets config/c_locale_generic.cc and friends
993 dnl default is generic
995 AC_DEFUN(GLIBCPP_ENABLE_CLOCALE, [
996 AC_MSG_CHECKING([for clocale to use])
997 AC_ARG_ENABLE(clocale,
998 [ --enable-clocale enable model for target locale package.
999 --enable-clocale=MODEL use MODEL target-speific locale package. [default=generic]
1001 if test x$enable_clocale = xno; then
1002 enable_clocale=generic
1004 enable_clocale=generic)
1006 enable_clocale_flag=$enable_clocale
1008 dnl Check if a valid locale package
1009 case x${enable_clocale_flag} in
1011 CLOCALE_H=config/c_locale_gnu.h
1012 CLOCALE_CC=config/c_locale_gnu.cc
1016 CLOCALE_H=config/c_locale_generic.h
1017 CLOCALE_CC=config/c_locale_generic.cc
1018 AC_MSG_RESULT(generic)
1021 echo "$enable_clocale is an unknown locale package" 1>&2
1026 AC_LINK_FILES($CLOCALE_H, include/bits/c++locale.h)
1027 AC_LINK_FILES($CLOCALE_CC, src/c++locale.cc)
1032 dnl Check for which I/O library to use: libio, or something specific.
1034 dnl GLIBCPP_ENABLE_CSTDIO
1035 dnl --enable-cstdio=libio sets config/c_io_libio.h and friends
1037 dnl default is stdio
1039 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1040 AC_MSG_CHECKING([for cstdio to use])
1041 AC_ARG_ENABLE(cstdio,
1042 [ --enable-cstdio enable stdio for target io package.
1043 --enable-cstdio=LIB use LIB target-speific io package. [default=stdio]
1045 if test x$enable_cstdio = xno; then
1048 enable_cstdio=stdio)
1050 enable_cstdio_flag=$enable_cstdio
1052 dnl Check if a valid I/O package
1053 case x${enable_cstdio_flag} in
1055 CSTDIO_H=config/c_io_libio.h
1056 BASIC_FILE_H=config/basic_file_libio.h
1057 BASIC_FILE_CC=config/basic_file_libio.cc
1058 AC_MSG_RESULT(libio)
1060 # see if we are on a system with libio native (ie, linux)
1061 AC_CHECK_HEADER(libio.h, has_libio=yes, has_libio=no)
1063 # Need to check and see what version of glibc is being used. If
1064 # it's not glibc-2.2 or higher, then we'll need to go ahead and
1065 # compile most of libio for linux systems.
1066 if test x$has_libio = x"yes"; then
1069 AC_MSG_CHECKING([for glibc version >= 2.2])
1070 AC_EGREP_CPP([ok], [
1071 #include <features.h>
1072 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1075 ], glibc_satisfactory=yes, glibc_satisfactory=no)
1076 AC_MSG_RESULT($glibc_satisfactory)
1080 # XXX at the moment, admit defeat and force the recompilation
1081 # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1082 glibc_satisfactory=no
1084 if test x$glibc_satisfactory = x"yes"; then
1089 # bkoz XXX need to add checks to enable this
1090 # pme XXX here's a first pass at such a check
1091 if test x$enable_c_mbchar != xno; then
1099 # Using libio, but <libio.h> doesn't exist on the target system. . .
1101 # bkoz XXX need to add checks to enable this
1102 # pme XXX here's a first pass at such a check
1103 if test x$enable_c_mbchar != xno; then
1110 xstdio | x | xno | xnone | xyes)
1112 CSTDIO_H=config/c_io_stdio.h
1113 BASIC_FILE_H=config/basic_file_stdio.h
1114 BASIC_FILE_CC=config/basic_file_stdio.cc
1115 AC_MSG_RESULT(stdio)
1117 # We're not using stdio.
1122 echo "$enable_cstdio is an unknown io package" 1>&2
1126 AC_LINK_FILES($CSTDIO_H, include/bits/c++io.h)
1127 AC_LINK_FILES($BASIC_FILE_H, include/bits/basic_file_model.h)
1128 AC_LINK_FILES($BASIC_FILE_CC, src/basic_file.cc)
1130 # 2000-08-04 bkoz hack
1131 CCODECVT_C=config/c_io_libio_codecvt.c
1132 AC_LINK_FILES($CCODECVT_C, libio/c_codecvt.c)
1133 # 2000-08-04 bkoz hack
1135 AM_CONDITIONAL(GLIBCPP_BUILD_LIBIO,
1136 test "$need_libio" = yes || test "$need_wlibio" = yes)
1137 AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1138 AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1139 if test "$need_libio" = yes || test "$need_wlibio" = yes; then
1140 libio_la=../libio/libio.la
1149 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1150 dnl We must stage the required headers so that they will be installed
1151 dnl with the library (unlike libgcc, the STL implementation is provided
1152 dnl solely within headers). Since we must not inject random user-space
1153 dnl macro names into user-provided C++ code, we first stage into <file>-in
1154 dnl and process to <file> with an output command. The reason for a two-
1155 dnl stage process here is to correctly handle $srcdir!=$objdir without
1156 dnl having to write complex code (the sed commands to clean the macro
1157 dnl namespace are complex and fragile enough as it is).
1159 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1160 AC_MSG_CHECKING([for thread model used by GCC])
1161 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
1162 AC_MSG_RESULT([$target_thread_file])
1164 AC_LINK_FILES($toprel/gcc/gthr.h, include/bits/gthr.h-in)
1165 AC_LINK_FILES($toprel/gcc/gthr-single.h,
1166 include/bits/gthr-single.h-in)
1167 AC_LINK_FILES($toprel/gcc/gthr-$target_thread_file.h,
1168 include/bits/gthr-default.h-in)
1169 if test $target_thread_file != single; then
1170 AC_DEFINE(HAVE_GTHR_DEFAULT)
1171 AC_DEFINE(_GLIBCPP_SUPPORTS_WEAK, __GXX_WEAK__)
1173 AC_OUTPUT_COMMANDS([d=include/bits
1174 rm -f $d/gthr.h $d/gthr-single.h $d/gthr-default.h
1175 sed '/^#/s/\([A-Z_][A-Z_]*\)/_GLIBCPP_\1/g' <$d/gthr.h-in >$d/gthr.h
1176 sed 's/\(UNUSED\)/_GLIBCPP_\1/g' <$d/gthr-single.h-in \
1177 | sed 's/\(GCC[A-Z_]*_H\)/_GLIBCPP_\1/g' >$d/gthr-single.h
1178 sed 's/\(UNUSED\)/_GLIBCPP_\1/g' <$d/gthr-default.h-in \
1179 | sed 's/\(GCC[A-Z_]*_H\)/_GLIBCPP_\1/g' \
1180 | sed 's/\([A-Z_]*WEAK\)/_GLIBCPP_\1/g' >$d/gthr-default.h])
1185 dnl Check for exception handling support. If an explicit enable/disable
1186 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1187 dnl target may or may not support call frame exceptions.
1189 dnl GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
1190 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1191 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1193 dnl Define _GLIBCPP_SJLJ_EXCEPTIONS if the compiler is configured for it.
1195 AC_DEFUN(GLIBCPP_ENABLE_SJLJ_EXCEPTIONS, [
1196 AC_MSG_CHECKING([for exception model to use])
1199 AC_ARG_ENABLE(sjlj-exceptions,
1200 [ --enable-sjlj-exceptions force use of builtin_setjmp for exceptions],
1202 [dnl Botheration. Now we've got to detect the exception model.
1203 dnl Link tests against libgcc.a are problematic since -- at least
1204 dnl as of this writing -- we've not been given proper -L bits for
1205 dnl single-tree newlib and libgloss.
1207 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
1208 dnl conftest files before we got a change to grep them first.
1209 cat > conftest.$ac_ext << EOF
1210 [#]line __oline__ "configure"
1219 old_CXXFLAGS="$CXXFLAGS"
1221 if AC_TRY_EVAL(ac_compile); then
1222 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1223 enable_sjlj_exceptions=yes
1224 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1225 enable_sjlj_exceptions=no
1228 CXXFLAGS="$old_CXXFLAGS"
1230 if test x$enable_sjlj_exceptions = xyes; then
1231 AC_DEFINE(_GLIBCPP_SJLJ_EXCEPTIONS, 1,
1232 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1233 ac_exception_model_name=sjlj
1234 elif test x$enable_sjlj_exceptions = xno; then
1235 ac_exception_model_name="call frame"
1237 AC_MSG_ERROR([unable to detect exception model])
1240 AC_MSG_RESULT($ac_exception_model_name)
1245 dnl Check for ISO/IEC 9899:1999 "C99" support.
1247 dnl GLIBCPP_ENABLE_C99
1248 dnl --enable-c99 defines _GLIBCPP_USE_C99
1249 dnl --disable-c99 leaves _GLIBCPP_USE_C99 undefined
1250 dnl + Usage: GLIBCPP_ENABLE_C99[(DEFAULT)]
1251 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1252 dnl defaults to `no'.
1253 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
1255 dnl GLIBCPP_ENABLE_C99
1256 AC_DEFUN(GLIBCPP_ENABLE_C99, [dnl
1257 define([GLIBCPP_ENABLE_C99_DEFAULT], ifelse($1, yes, yes, no))dnl
1260 changequote(<<, >>)dnl
1261 <<--enable-c99 turns on 'ISO/IEC 9899:1999 support' [default=>>GLIBCPP_ENABLE_C99_DEFAULT],
1262 changequote([, ])dnl
1263 [case "$enableval" in
1264 yes) enable_c99=yes ;;
1265 no) enable_c99=no ;;
1266 *) AC_MSG_ERROR([Unknown argument to enable/disable C99]) ;;
1268 enable_c99=GLIBCPP_ENABLE_C99_DEFAULT)dnl
1273 # Check for the existence of <math.h> functions used if C99 is enabled.
1275 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
1276 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
1277 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
1278 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
1279 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
1280 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
1281 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
1282 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
1283 AC_TRY_COMPILE([#include <math.h>],
1284 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
1285 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
1286 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
1287 AC_TRY_COMPILE([#include <math.h>],
1288 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
1289 AC_TRY_COMPILE([#include <math.h>],
1290 [isunordered(0.0,0.0);],, [ac_c99_math=no])
1291 AC_MSG_RESULT($ac_c99_math)
1293 # Check for the existence in <stdio.h> of vscanf, et. al.
1295 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1296 AC_TRY_COMPILE([#include <stdio.h>],
1297 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
1298 AC_TRY_COMPILE([#include <stdio.h>
1300 void foo(char* fmt, ...)
1301 {va_list args; va_start(args, fmt);
1302 vfscanf(stderr, "%i", args);}],
1303 [],, [ac_c99_stdio=no])
1304 AC_TRY_COMPILE([#include <stdio.h>
1306 void foo(char* fmt, ...)
1307 {va_list args; va_start(args, fmt);
1308 vscanf("%i", args);}],
1309 [],, [ac_c99_stdio=no])
1310 AC_TRY_COMPILE([#include <stdio.h>
1312 void foo(char* fmt, ...)
1313 {va_list args; va_start(args, fmt);
1314 vsnprintf(fmt, 0, "%i", args);}],
1315 [],, [ac_c99_stdio=no])
1316 AC_TRY_COMPILE([#include <stdio.h>
1318 void foo(char* fmt, ...)
1319 {va_list args; va_start(args, fmt);
1320 vsscanf(fmt, "%i", args);}],
1321 [],, [ac_c99_stdio=no])
1322 AC_MSG_RESULT($ac_c99_stdio)
1324 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1326 AC_MSG_CHECKING([for lldiv_t declaration])
1327 AC_CACHE_VAL(ac_c99_lldiv_t, [
1328 AC_TRY_COMPILE([#include <stdlib.h>],
1330 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
1332 AC_MSG_RESULT($ac_c99_lldiv_t)
1334 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1335 AC_TRY_COMPILE([#include <stdlib.h>],
1336 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
1337 AC_TRY_COMPILE([#include <stdlib.h>],
1338 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
1339 AC_TRY_COMPILE([#include <stdlib.h>],
1340 [char* tmp; strtoll("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1341 AC_TRY_COMPILE([#include <stdlib.h>],
1342 [char* tmp; strtoull("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1343 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
1344 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
1345 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
1346 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
1347 if test x"$ac_c99_lldiv_t" = x"no"; then
1350 AC_MSG_RESULT($ac_c99_stdlib)
1352 # Check for the existence of <wchar.h> functions used if C99 is enabled.
1353 # XXX the wchar.h checks should be rolled into the general C99 bits.
1355 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
1356 AC_TRY_COMPILE([#include <wchar.h>],
1357 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
1358 AC_TRY_COMPILE([#include <wchar.h>],
1359 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
1360 AC_TRY_COMPILE([#include <wchar.h>],
1361 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
1362 AC_MSG_RESULT($ac_c99_wchar)
1364 AC_MSG_CHECKING([for enabled ISO C99 support])
1365 if test x"$ac_c99_math" = x"no" ||
1366 test x"$ac_c99_stdio" = x"no" ||
1367 test x"$ac_c99_stdlib" = x"no" ||
1368 test x"$ac_c99_wchar" = x"no"; then
1371 AC_MSG_RESULT($enable_c99)
1373 # Option parsed, now set things appropriately
1374 if test x"$enable_c99" = x"yes"; then
1375 AC_DEFINE(_GLIBCPP_USE_C99)
1383 dnl Check for template specializations for the 'long long' type extension.
1384 dnl NB: Must check for C99 support before calling _GLIBCPP_ENABLE_LONG_LONG
1386 dnl GLIBCPP_ENABLE_LONG_LONG
1387 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1388 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1389 dnl + Usage: GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1390 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1391 dnl defaults to `no'.
1392 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1394 dnl GLIBCPP_ENABLE_LONG_LONG
1395 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1396 define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1398 AC_ARG_ENABLE(long-long,
1399 changequote(<<, >>)dnl
1400 <<--enable-long-long turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1401 changequote([, ])dnl
1402 [case "$enableval" in
1403 yes) enable_long_long=yes ;;
1404 no) enable_long_long=no ;;
1405 *) AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1407 enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1409 # iostreams require strtoll, strtoull to compile. If the
1410 # GLIBCPP_ENABLE_C99 tests found these, and if C99 support is enabled,
1411 # go ahead and allow long long to be used.
1412 if test x"$enable_c99" = x"no"; then
1413 enable_long_long=no;
1416 # Option parsed, now set things appropriately
1417 AC_MSG_CHECKING([for enabled long long support])
1418 if test x"$enable_long_long" = xyes; then
1419 AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1421 AC_MSG_RESULT($enable_long_long)
1426 dnl Check for what kind of C headers to use.
1428 dnl GLIBCPP_ENABLE_CHEADERS
1429 dnl --enable-cheaders= [does stuff].
1430 dnl --disable-cheaders [does not do anything, really].
1431 dnl + This will eventually need to be 'c_shadow' by default.
1432 dnl + Usage: GLIBCPP_ENABLE_CHEADERS[(DEFAULT)]
1433 dnl Where DEFAULT is either `c' or `c_std' or 'c_shadow'.
1434 dnl If ommitted, it defaults to `c_std'.
1435 AC_DEFUN(GLIBCPP_ENABLE_CHEADERS, [dnl
1436 define([GLIBCPP_ENABLE_CHEADERS_DEFAULT], ifelse($1, c_std, c_std, c_std))dnl
1437 AC_MSG_CHECKING([for c header strategy to use])
1438 AC_ARG_ENABLE(cheaders,
1439 changequote(<<, >>)dnl
1440 << --enable-cheaders construct "C" header files for g++ [default=>>GLIBCPP_ENABLE_CHEADERS_DEFAULT],
1442 [case "$enableval" in
1447 enable_cheaders=c_std
1450 enable_cheaders=c_shadow
1452 *) AC_MSG_ERROR([Unknown argument to enable/disable "C" headers])
1455 enable_cheaders=GLIBCPP_ENABLE_CHEADERS_DEFAULT)
1456 AC_MSG_RESULT($enable_cheaders)
1458 dnl Option parsed, now set things appropriately
1459 case "$enable_cheaders" in
1461 CSHADOW_FLAGS="-fno-builtin"
1462 C_INCLUDE_DIR='${top_srcdir}/include/c_shadow'
1463 AC_DEFINE(_GLIBCPP_USE_SHADOW_HEADERS)
1467 C_INCLUDE_DIR='${top_srcdir}/include/c_std'
1471 C_INCLUDE_DIR='${top_srcdir}/include/c'
1475 AC_SUBST(CSHADOW_FLAGS)
1476 AC_SUBST(C_INCLUDE_DIR)
1477 AM_CONDITIONAL(GLIBCPP_USE_CSHADOW, test "$enable_cheaders" = c_shadow)
1482 dnl Check for wide character support. Has the same effect as the option
1483 dnl in gcc's configure, but in a form that autoconf can mess with.
1485 dnl GLIBCPP_ENABLE_C_MBCHAR
1486 dnl --enable-c-mbchar requests all the wchar_t stuff.
1487 dnl --disable-c-mbchar doesn't.
1488 dnl + Usage: GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1489 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1490 dnl defaults to `no'.
1491 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1492 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1493 AC_ARG_ENABLE(c-mbchar,
1494 changequote(<<, >>)dnl
1495 << --enable-c-mbchar enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1496 changequote([, ])dnl
1497 [case "$enableval" in
1498 yes) enable_c_mbchar=yes ;;
1499 no) enable_c_mbchar=no ;;
1500 *) AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1502 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1503 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1508 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1510 dnl GLIBCPP_INCLUDE_DIR
1512 dnl TOPLEVEL_INCLUDES
1513 dnl LIBMATH_INCLUDES
1514 dnl LIBSUPCXX_INCLUDES
1516 dnl CSHADOW_INCLUDES
1518 dnl GLIBCPP_EXPORT_INCLUDE
1519 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1520 # Root level of the include sources.
1521 GLIBCPP_INCLUDE_DIR='$(top_srcdir)/include'
1523 # Can either use include/c or include/c_std to grab "C" headers. This
1524 # variable is set to the include directory currently in use.
1525 # set with C_INCLUDE_DIR in GLIBCPP_ENABLE_CHEADERS
1527 # Passed down for canadian crosses.
1528 if test x"$CANADIAN" = xyes; then
1529 TOPLEVEL_INCLUDES='-I$(includedir)'
1532 LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1534 LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1536 #if GLIBCPP_NEED_LIBIO
1537 LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1539 #LIBIO_INCLUDES='-I$(top_srcdir)/libio'
1542 #if GLIBCPP_USE_CSHADOW
1543 # CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR) \
1544 # -I$(top_blddir)/cshadow'
1546 CSTD_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR)'
1549 # Now, export this to all the little Makefiles....
1550 AC_SUBST(GLIBCPP_INCLUDE_DIR)
1551 AC_SUBST(TOPLEVEL_INCLUDES)
1552 AC_SUBST(LIBMATH_INCLUDES)
1553 AC_SUBST(LIBSUPCXX_INCLUDES)
1554 AC_SUBST(LIBIO_INCLUDES)
1555 AC_SUBST(CSTD_INCLUDES)
1560 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1562 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1563 # Optimization flags that are probably a good idea for thrill-seekers. Just
1564 # uncomment the lines below and make, everything else is ready to go...
1565 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1567 AC_SUBST(OPTIMIZE_CXXFLAGS)
1569 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings -Winline'
1570 AC_SUBST(WARN_FLAGS)
1574 dnl GLIBCPP_EXPORT_INSTALL_INFO
1575 dnl calculates gxx_install_dir
1576 dnl exports glibcpp_toolexecdir
1577 dnl exports glibcpp_toolexeclibdir
1578 dnl exports glibcpp_builddir
1579 dnl exports glibcpp_srcdir
1580 dnl exports glibcpp_prefixdir
1582 dnl Assumes cross_compiling bits already done, and with_cross_host in
1585 dnl GLIBCPP_EXPORT_INSTALL_INFO
1586 AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [
1588 glibcpp_toolexecdir=no
1589 glibcpp_toolexeclibdir=no
1591 # Export build and source directories.
1592 # These need to be absolute paths, yet at the same time need to
1593 # canonicalize only relative paths, because then amd will not unmount
1594 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
1595 glibcpp_builddir=`pwd`
1597 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
1598 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
1600 glibcpp_prefixdir=${prefix}
1602 AC_MSG_CHECKING([for interface version number])
1603 libstdcxx_interface=$INTERFACE
1604 AC_MSG_RESULT($libstdcxx_interface)
1606 # Process the option --with-gxx-include-dir=<path to include-files directory>
1607 AC_MSG_CHECKING([for --with-gxx-include-dir])
1608 AC_ARG_WITH(gxx-include-dir,
1609 [ --with-gxx-include-dir the installation directory for include files],
1610 [case "${withval}" in
1612 AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
1619 gxx_include_dir=${withval}
1621 esac], [gxx_include_dir=no])
1622 AC_MSG_RESULT($gxx_include_dir)
1624 # Process the option "--enable-version-specific-runtime-libs"
1625 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
1626 AC_ARG_ENABLE(version-specific-runtime-libs,
1627 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
1628 [ version_specific_libs=yes
1629 # Need the gcc compiler version to know where to install libraries
1630 # and header files if --enable-version-specific-runtime-libs option
1633 gcc_version_trigger=${srcdir}/../gcc/version.c
1634 gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([^\"]*\)\".*/\1/'`
1635 gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
1636 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/g++
1637 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1638 glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)'
1640 ],version_specific_libs=no)
1641 AC_MSG_RESULT($version_specific_libs)
1643 # Default case for install directory for include files.
1644 if test x"$version_specific_libs" = x"no" \
1645 && test x"$gxx_include_dir" = x"no"; then
1646 gxx_include_dir='$(prefix)'/include/g++-${libstdcxx_interface}
1649 # Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir
1650 # Install a library built with a cross compiler in tooldir, not libdir.
1651 if test x"$glibcpp_toolexecdir" = x"no"; then
1652 if test -n "$with_cross_host" &&
1653 test x"$with_cross_host" != x"no"; then
1654 glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)'
1655 glibcpp_toolexeclibdir='$(toolexecdir)/lib$(MULTISUBDIR)'
1657 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1658 glibcpp_toolexeclibdir='$(libdir)$(MULTISUBDIR)'
1662 AC_MSG_CHECKING([for install location])
1663 AC_MSG_RESULT($gxx_include_dir)
1665 AC_SUBST(glibcpp_builddir)
1666 AC_SUBST(glibcpp_srcdir)
1667 AC_SUBST(glibcpp_prefixdir)
1668 AC_SUBST(gxx_include_dir)
1669 AC_SUBST(glibcpp_toolexecdir)
1670 AC_SUBST(glibcpp_toolexeclibdir)
1674 # Check whether LC_MESSAGES is available in <locale.h>.
1675 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1677 # This file file 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 AC_DEFUN(AC_LC_MESSAGES, [
1685 AC_CHECK_HEADER(locale.h, [
1686 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1687 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1688 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1689 if test $ac_cv_val_LC_MESSAGES = yes; then
1690 AC_DEFINE(HAVE_LC_MESSAGES)
1696 # Check for functions in math library.
1697 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1699 # This file can be copied and used freely without restrictions. It can
1700 # be used in projects which are not available under the GNU Public License
1701 # but which still want to provide support for the GNU gettext functionality.
1702 # Please note that the actual code is *not* freely available.
1706 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1707 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1708 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])
1709 AC_SUBST(LIBMATHOBJS)dnl
1713 # Check for string functions.
1714 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1716 # This file can be copied and used freely without restrictions. It can
1717 # be used in projects which are not available under the GNU Public License
1718 # but which still want to provide support for the GNU gettext functionality.
1719 # Please note that the actual code is *not* freely available.
1723 dnl AC_REPLACE_STRINGFUNCS(FUNCTION...)
1724 AC_DEFUN(AC_REPLACE_STRINGFUNCS,
1725 [AC_CHECK_FUNCS([$1], , [LIBSTRINGOBJS="$LIBSTRINGOBJS ${ac_func}.lo"])
1726 AC_SUBST(LIBSTRINGOBJS)dnl
1730 dnl This macro searches for a GNU version of make. If a match is found, the
1731 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1732 dnl set to "#". This is useful for including a special features in a Makefile,
1733 dnl which cannot be handled by other versions of make. The variable
1734 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1735 dnl the empty string otherwise.
1737 dnl Here is an example of its use:
1739 dnl Makefile.in might contain:
1741 dnl # A failsafe way of putting a dependency rule into a makefile
1743 dnl $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1745 dnl @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1746 dnl @ifGNUmake@ include $(DEPEND)
1747 dnl @ifGNUmake@ endif
1749 dnl Then configure.in would normally contain:
1751 dnl CHECK_GNU_MAKE()
1752 dnl AC_OUTPUT(Makefile)
1754 dnl Then perhaps to cause gnu make to override any other make, we could do
1755 dnl something like this (note that GNU make always looks for GNUmakefile first):
1757 dnl if ! test x$_cv_gnu_make_command = x ; then
1758 dnl mv Makefile GNUmakefile
1759 dnl echo .DEFAULT: > Makefile ;
1760 dnl echo \ $_cv_gnu_make_command \$@ >> Makefile;
1763 dnl Then, if any (well almost any) other make is called, and GNU make also
1764 dnl exists, then the other make wraps the GNU make.
1766 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1767 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1769 dnl #### Changes for libstdc++-v3: reformatting and linewrapping; prepending
1770 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1771 dnl #### conditional's subshell (" --version" is not a command), using a
1772 dnl #### different option to grep(1).
1774 dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not
1775 dnl #### ${MAKE:-make}).
1778 GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
1779 _cv_gnu_make_command='' ;
1780 dnl Search all the common names for GNU make
1781 for a in "${MAKE-make}" make gmake gnumake ; do
1782 if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
1784 _cv_gnu_make_command=$a ;
1789 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
1790 dnl string, '#' otherwise
1791 if test "x$_cv_gnu_make_command" != "x" ; then
1799 sinclude(../libtool.m4)
1800 dnl The lines below arrange for aclocal not to bring an installed
1801 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1802 dnl add a definition of LIBTOOL to Makefile.in.
1803 ifelse(,,,[AC_SUBST(LIBTOOL)
1804 AC_DEFUN([AM_PROG_LIBTOOL])
1805 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1806 AC_DEFUN([AC_PROG_LD])
1811 # Do all the work for Automake. This macro actually does too much --
1812 # some checks are only needed if your package does certain things.
1813 # But this isn't really a big deal.
1818 dnl AM_INIT_AUTOMAKE(package,version, [no-define])
1820 AC_DEFUN(AM_INIT_AUTOMAKE,
1821 [AC_REQUIRE([AC_PROG_INSTALL])
1826 dnl test to see if srcdir already configured
1827 if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
1828 AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
1831 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of package])
1832 AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version number of package]))
1833 AC_REQUIRE([AM_SANITY_CHECK])
1834 AC_REQUIRE([AC_ARG_PROGRAM])
1835 dnl FIXME This is truly gross.
1836 missing_dir=`cd $ac_aux_dir && pwd`
1837 AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
1838 AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
1839 AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
1840 AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
1841 AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
1842 AC_REQUIRE([AC_PROG_MAKE_SET])])
1845 # Check to make sure that the build environment is sane.
1848 AC_DEFUN(AM_SANITY_CHECK,
1849 [AC_MSG_CHECKING([whether build environment is sane])
1852 echo timestamp > conftestfile
1853 # Do `set' in a subshell so we don't clobber the current shell's
1854 # arguments. Must try -L first in case configure is actually a
1855 # symlink; some systems play weird games with the mod time of symlinks
1856 # (eg FreeBSD returns the mod time of the symlink's containing
1859 set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
1860 if test "[$]*" = "X"; then
1862 set X `ls -t $srcdir/configure conftestfile`
1864 if test "[$]*" != "X $srcdir/configure conftestfile" \
1865 && test "[$]*" != "X conftestfile $srcdir/configure"; then
1867 # If neither matched, then we have a broken ls. This can happen
1868 # if, for instance, CONFIG_SHELL is bash and it inherits a
1869 # broken ls alias from the environment. This has actually
1870 # happened. Such a system could not be considered "sane".
1871 AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
1872 alias in your environment])
1875 test "[$]2" = conftestfile
1881 AC_MSG_ERROR([newly created file is older than distributed files!
1882 Check your system clock])
1885 AC_MSG_RESULT(yes)])
1887 dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
1888 dnl The program must properly implement --version.
1889 AC_DEFUN(AM_MISSING_PROG,
1890 [AC_MSG_CHECKING(for working $2)
1891 # Run test in a subshell; some versions of sh will print an error if
1892 # an executable is not found, even if stderr is redirected.
1893 # Redirect stdin to placate older versions of autoconf. Sigh.
1894 if ($2 --version) < /dev/null > /dev/null 2>&1; then
1896 AC_MSG_RESULT(found)
1899 AC_MSG_RESULT(missing)
1903 # Add --enable-maintainer-mode option to configure.
1908 AC_DEFUN(AM_MAINTAINER_MODE,
1909 [AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
1910 dnl maintainer-mode is disabled by default
1911 AC_ARG_ENABLE(maintainer-mode,
1912 [ --enable-maintainer-mode enable make rules and dependencies not useful
1913 (and sometimes confusing) to the casual installer],
1914 USE_MAINTAINER_MODE=$enableval,
1915 USE_MAINTAINER_MODE=no)
1916 AC_MSG_RESULT($USE_MAINTAINER_MODE)
1917 AM_CONDITIONAL(MAINTAINER_MODE, test $USE_MAINTAINER_MODE = yes)
1918 MAINT=$MAINTAINER_MODE_TRUE
1923 # Define a conditional.
1925 AC_DEFUN(AM_CONDITIONAL,
1936 # Like AC_CONFIG_HEADER, but automatically create stamp file.
1938 AC_DEFUN(AM_CONFIG_HEADER,
1940 AC_CONFIG_HEADER([$1])
1941 dnl When config.status generates a header, we must update the stamp-h file.
1942 dnl This file resides in the same directory as the config header
1943 dnl that is generated. We must strip everything past the first ":",
1944 dnl and everything past the last "/".
1945 AC_OUTPUT_COMMANDS(changequote(<<,>>)dnl
1946 ifelse(patsubst(<<$1>>, <<[^ ]>>, <<>>), <<>>,
1947 <<test -z "<<$>>CONFIG_HEADERS" || echo timestamp > patsubst(<<$1>>, <<^\([^:]*/\)?.*>>, <<\1>>)stamp-h<<>>dnl>>,
1949 for am_file in <<$1>>; do
1950 case " <<$>>CONFIG_HEADERS " in
1951 *" <<$>>am_file "*<<)>>
1952 echo timestamp > `echo <<$>>am_file | sed -e 's%:.*%%' -e 's%[^/]*$%%'`stamp-h$am_indx
1955 am_indx=`expr "<<$>>am_indx" + 1`