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.
16 dnl Define OPTLEVEL='-O2' if new inlining code present.
19 AC_DEFUN(GLIBCPP_CONFIGURE, [
20 dnl Default to --enable-multilib
21 AC_ARG_ENABLE(multilib,
22 [ --enable-multilib build hella library versions (default)],
23 [case "${enableval}" in
26 *) AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
27 esac], [multilib=yes])dnl
29 glibcpp_basedir=$auxdir/$1/libstdc++-v3
30 AC_SUBST(glibcpp_basedir)
32 AM_INIT_AUTOMAKE(libstdc++, 2.92)
34 # Never versions of autoconf add an underscore to these functions.
35 # Prevent future problems ...
36 ifdef([AC_PROG_CC_G],[],[define([AC_PROG_CC_G],defn([_AC_PROG_CC_G]))])
37 ifdef([AC_PROG_CC_GNU],[],[define([AC_PROG_CC_GNU],defn([_AC_PROG_CC_GNU]))])
38 ifdef([AC_PROG_CXX_G],[],[define([AC_PROG_CXX_G],defn([_AC_PROG_CXX_G]))])
39 ifdef([AC_PROG_CXX_GNU],[],[define([AC_PROG_CXX_GNU],defn([_AC_PROG_CXX_GNU]))])
43 # FIXME: We temporarily define our own version of AC_PROG_CC. This is
44 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS. We
45 # are probably using a cross compiler, which will not be able to fully
46 # link an executable. This should really be fixed in autoconf
49 AC_DEFUN(LIB_AC_PROG_CC,
50 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
51 dnl Fool anybody using AC_PROG_CC.
52 AC_PROVIDE([AC_PROG_CC])
53 AC_CHECK_PROG(CC, gcc, gcc)
54 if test -z "$CC"; then
55 AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
56 test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
61 if test $ac_cv_prog_gcc = yes; then
63 dnl Check whether -g works, even if CFLAGS is set, in case the package
64 dnl plays around with CFLAGS (such as to build both debugging and
65 dnl normal versions of a library), tasteless as that idea is.
66 ac_test_CFLAGS="${CFLAGS+set}"
67 ac_save_CFLAGS="$CFLAGS"
70 if test "$ac_test_CFLAGS" = set; then
71 CFLAGS="$ac_save_CFLAGS"
72 elif test $ac_cv_prog_cc_g = yes; then
79 test "${CFLAGS+set}" = set || CFLAGS="-g"
85 # Can't just call these here as g++ requires libstc++ to be built....
88 # Likewise for AC_PROG_CXX.
89 AC_DEFUN(LIB_AC_PROG_CXX,
90 [AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
91 dnl Fool anybody using AC_PROG_CXX.
92 AC_PROVIDE([AC_PROG_CXX])
93 # Use glibcpp_CXX so that we do not cause CXX to be cached with the
94 # flags that come in CXX while configuring libstdc++. They're different
95 # from those used for all other target libraries. If CXX is set in
96 # the environment, respect that here.
98 AC_CHECK_PROGS(glibcpp_CXX, $CCC c++ g++ gcc CC cxx cc++, gcc)
101 test -z "$glibcpp_CXX" && AC_MSG_ERROR([no acceptable c++ found in \$PATH])
105 if test $ac_cv_prog_gxx = yes; then
107 dnl Check whether -g works, even if CXXFLAGS is set, in case the package
108 dnl plays around with CXXFLAGS (such as to build both debugging and
109 dnl normal versions of a library), tasteless as that idea is.
110 ac_test_CXXFLAGS="${CXXFLAGS+set}"
111 ac_save_CXXFLAGS="$CXXFLAGS"
114 if test "$ac_test_CXXFLAGS" = set; then
115 CXXFLAGS="$ac_save_CXXFLAGS"
116 elif test $ac_cv_prog_cxx_g = yes; then
123 test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
129 AC_CHECK_TOOL(AS, as)
130 AC_CHECK_TOOL(AR, ar)
131 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
136 # We need AC_EXEEXT to keep automake happy in cygnus mode. However,
137 # at least currently, we never actually build a program, so we never
138 # need to use $(EXEEXT). Moreover, the test for EXEEXT normally
139 # fails, because we are probably configuring with a cross compiler
140 # which cant create executables. So we include AC_EXEEXT to keep
141 # automake happy, but we dont execute it, since we dont care about
144 # autoconf 2.50 runs AC_EXEEXT by default, and the macro expands
145 # to nothing, so nothing would remain between `then' and `fi' if it
146 # were not for the `:' below.
151 . [$]{glibcpp_basedir}/configure.host
153 case [$]{glibcpp_basedir} in
154 /* | [A-Za-z]:[\\/]*) libgcj_flagbasedir=[$]{glibcpp_basedir} ;;
155 *) glibcpp_flagbasedir='[$](top_builddir)/'[$]{glibcpp_basedir} ;;
158 # This does for the target what configure.host does for the host. In
159 # addition to possibly modifying the same flags, it also sets up symlinks.
165 dnl Check to see if g++ can compile this library, and if so, if any version-
166 dnl specific precautions need to be taken.
168 dnl GLIBCPP_CHECK_COMPILER_VERSION
169 AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [
170 if test ! -f stamp-sanity-compiler; then
171 AC_MSG_CHECKING([for g++ that will successfully compile libstdc++-v3])
178 ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to GCC 3.0 or above]))
180 AC_MSG_RESULT($gpp_satisfactory)
181 touch stamp-sanity-compiler
187 dnl Test for newer compiler features, or features that are present in newer
188 dnl compiler version but not older compiler versions should be placed
191 dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the
192 dnl new inlining code or the new system_header pragma will die on -Werror.
193 dnl Leave it out by default and use maint-mode to use it.
195 dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if
196 dnl compiler supports it and the user has not requested debug mode.
198 dnl GLIBCPP_CHECK_COMPILER_FEATURES
199 AC_DEFUN(GLIBCPP_CHECK_COMPILER_FEATURES, [
200 # All these tests are for C++; save the language and the compiler flags.
201 # The CXXFLAGS thing is suspicious, but based on similar bits
202 # found in GLIBCPP_CONFIGURE.
205 ac_test_CXXFLAGS="${CXXFLAGS+set}"
206 ac_save_CXXFLAGS="$CXXFLAGS"
208 # Check for maintainer-mode bits.
209 if test x"$USE_MAINTAINER_MODE" = xno; then
215 # Check for -ffunction-sections -fdata-sections
216 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
217 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
218 AC_TRY_COMPILE(, [int foo;
219 ], [ac_fdsections=yes], [ac_fdsections=no])
220 if test "$ac_test_CXXFLAGS" = set; then
221 CXXFLAGS="$ac_save_CXXFLAGS"
223 # this is the suspicious part
226 if test x"$ac_fdsections" = x"yes" && test x"$enable_debug" = x"no"; then
227 SECTION_FLAGS='-ffunction-sections -fdata-sections'
229 AC_MSG_RESULT($ac_fdsections)
233 AC_SUBST(SECTION_FLAGS)
238 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
239 dnl the native linker is in use, all variables will be defined to something
240 dnl safe (like an empty string).
242 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
243 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
245 dnl GLIBCPP_CHECK_LINKER_FEATURES
246 AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [
247 # If we're not using GNU ld, then there's no point in even trying these
248 # tests. Check for that first. We should have already tested for gld
249 # by now (in libtool), but require it now just to be safe...
252 AC_REQUIRE([AC_PROG_LD])
255 if test "$ac_cv_prog_gnu_ld" = "notbroken"; then
256 # GNU ld it is! Joy and bunny rabbits!
258 # All these tests are for C++; save the language and the compiler flags.
259 # Need to do this so that g++ won't try to link in libstdc++
260 ac_test_CFLAGS="${CFLAGS+set}"
261 ac_save_CFLAGS="$CFLAGS"
262 CFLAGS='-x c++ -Wl,--gc-sections'
264 # Check for -Wl,--gc-sections
265 # XXX This test is broken at the moment, as symbols required for
266 # linking are now in libsupc++ (not built yet.....). In addition,
267 # this test has cored on solaris in the past. In addition,
268 # --gc-sections doesn't really work at the moment (keeps on discarding
269 # used sections, first .eh_frame and now some of the glibc sections for
270 # iconv). Bzzzzt. Thanks for playing, maybe next time.
271 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
279 ], [ac_sectionLDflags=yes],[ac_sectionLFflags=no], [ac_sectionLDflags=yes])
280 if test "$ac_test_CFLAGS" = set; then
281 CFLAGS="$ac_save_CFLAGS"
283 # this is the suspicious part
286 if test "$ac_sectionLDflags" = "yes"; then
287 SECTION_LDFLAGS='-Wl,--gc-sections'
289 AC_MSG_RESULT($ac_sectionLDflags)
292 # Set linker optimization flags.
293 if test x"$ac_cv_prog_gnu_ld" = x"yes" && test x"$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 ONE parameter
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 ONE parameter
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"$ac_has_wchar_h" = xyes && test x"$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($has_weof)
827 dnl Tests for wide character functions used in char_traits<wchar_t>.
828 AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset \
829 wcsrtombs mbsrtowcs, ac_wfuncs=yes, ac_wfuncs=no)
831 dnl Do quick checks for things injected into std:: by the c_std headers.
832 AC_CHECK_FUNCS(fgetwc, fgetws)
834 AC_MSG_CHECKING([for ISO C99 wchar_t support])
835 if test x"$has_weof" = xyes && test x"$has_wchar_minmax" = xyes \
836 && test x"$ac_wfuncs" = xyes; then
837 ac_isoC99_wchar_t=yes
841 AC_MSG_RESULT($ac_isoC99_wchar_t)
843 dnl Use iconv for wchar_t to char conversions. As such, check for
844 dnl X/Open Portability Guide, version 2 features (XPG2).
845 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
846 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
848 dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
849 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
851 LIBS="$LIBS $libiconv"
853 AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
854 ac_XPG2funcs=yes, ac_XPG2funcs=no)
858 AC_MSG_CHECKING([for XPG2 wchar_t support])
859 if test x"$ac_has_iconv_h" = xyes && test x"$ac_has_langinfo_h" = xyes \
860 && test x"$ac_XPG2funcs" = xyes; then
865 AC_MSG_RESULT($ac_XPG2_wchar_t)
867 dnl At the moment, only enable wchar_t specializations if all the
868 dnl above support is present.
869 AC_MSG_CHECKING([for enabled wchar_t specializations])
870 if test x"$ac_isoC99_wchar_t" = xyes \
871 && test x"$ac_XPG2_wchar_t" = xyes; then
872 AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
878 dnl Wide characters disabled by the user.
879 AC_MSG_WARN([wchar_t support disabled.])
885 dnl Check for special debugging mode; not for production use.
887 dnl GLIBCPP_ENABLE_DEBUG
888 dnl --enable-debug sets '-ggdb3 -O0'.
889 dnl --disable-debug sets '-g' and whatever optimization options the
890 dnl compiler can handle.
891 dnl + --enable-maintainer-mode automatically defaults this to on.
892 dnl + Perhaps -D/-U of NDEBUG, DEBUG, DEBUG_ASSERT, ...?
893 dnl + Usage: GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
894 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
895 dnl defaults to `no'.
896 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
897 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
899 changequote(<<, >>)dnl
900 << --enable-debug extra debugging, turn off optimization [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
902 [case "${enableval}" in
903 yes) enable_debug=yes ;;
904 no) enable_debug=no ;;
905 *) AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
907 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
909 dnl Option parsed, now set things appropriately
910 case "${enable_debug}" in
912 DEBUG_FLAGS='-O0 -ggdb3'
918 AC_SUBST(DEBUG_FLAGS)
923 dnl Check for "unusual" flags to pass to the compiler while building.
925 dnl GLIBCPP_ENABLE_CXX_FLAGS
926 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
927 dnl experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
928 dnl Somehow this same set of flags must be passed when [re]building
930 dnl --disable-cxx-flags passes nothing.
931 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
932 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
933 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
934 dnl + Usage: GLIBCPP_ENABLE_CXX_FLAGS(default flags)
935 dnl If "default flags" is an empty string (or "none"), the effect is
936 dnl the same as --disable or --enable=no.
937 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
938 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
939 AC_ARG_ENABLE(cxx-flags,
940 changequote(<<, >>)dnl
941 << --enable-cxx-flags=FLAGS pass compiler FLAGS when building library;
942 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
944 [case "x$enableval" in
946 AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
948 enable_cxx_flags='' ;;
950 enable_cxx_flags="$enableval" ;;
952 enable_cxx_flags='GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT')
954 dnl Thinko on my part during design. This kludge is the workaround.
955 if test "$enable_cxx_flags" = "none"; then
959 dnl Run through flags (either default or command-line) and set anything
960 dnl extra (e.g., #defines) that must accompany particular g++ options.
961 if test -n "$enable_cxx_flags"; then
962 for f in $enable_cxx_flags; do
966 *) # and we're trying to pass /what/ exactly?
967 AC_MSG_ERROR([compiler flags start with a -]) ;;
971 EXTRA_CXX_FLAGS="$enable_cxx_flags"
972 AC_SUBST(EXTRA_CXX_FLAGS)
977 dnl Check for which locale library to use: gnu or generic.
979 dnl GLIBCPP_ENABLE_CLOCALE
980 dnl --enable-clocale=gnu sets config/c_locale_gnu.cc and friends
981 dnl --enable-clocale=generic sets config/c_locale_generic.cc and friends
983 dnl default is generic
985 AC_DEFUN(GLIBCPP_ENABLE_CLOCALE, [
986 AC_MSG_CHECKING([for clocale to use])
987 AC_ARG_ENABLE(clocale,
988 [ --enable-clocale enable model for target locale package.
989 --enable-clocale=MODEL use MODEL target-speific locale package. [default=generic]
991 if test x$enable_clocale = xno; then
992 enable_clocale=generic
994 enable_clocale=generic)
996 enable_clocale_flag=$enable_clocale
998 dnl Check if a valid locale package
999 case x${enable_clocale_flag} in
1001 CLOCALE_H=config/c_locale_gnu.h
1002 CLOCALE_CC=config/c_locale_gnu.cc
1006 CLOCALE_H=config/c_locale_generic.h
1007 CLOCALE_CC=config/c_locale_generic.cc
1008 AC_MSG_RESULT(generic)
1011 echo "$enable_clocale is an unknown locale package" 1>&2
1016 AC_LINK_FILES($CLOCALE_H, include/bits/c++locale.h)
1017 AC_LINK_FILES($CLOCALE_CC, src/c++locale.cc)
1022 dnl Check for which I/O library to use: libio, or something specific.
1024 dnl GLIBCPP_ENABLE_CSTDIO
1025 dnl --enable-cstdio=libio sets config/c_io_libio.h and friends
1027 dnl default is stdio
1029 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1030 AC_MSG_CHECKING([for cstdio to use])
1031 AC_ARG_ENABLE(cstdio,
1032 [ --enable-cstdio enable stdio for target io package.
1033 --enable-cstdio=LIB use LIB target-speific io package. [default=stdio]
1035 if test x$enable_cstdio = xno; then
1038 enable_cstdio=stdio)
1040 enable_cstdio_flag=$enable_cstdio
1042 dnl Check if a valid I/O package
1043 case x${enable_cstdio_flag} in
1045 CSTDIO_H=config/c_io_libio.h
1046 BASIC_FILE_H=config/basic_file_libio.h
1047 BASIC_FILE_CC=config/basic_file_libio.cc
1048 AC_MSG_RESULT(libio)
1050 # see if we are on a system with libio native (ie, linux)
1051 AC_CHECK_HEADER(libio.h, has_libio=yes, has_libio=no)
1053 # Need to check and see what version of glibc is being used. If
1054 # it's not glibc-2.2 or higher, then we'll need to go ahead and
1055 # compile most of libio for linux systems.
1056 if test x$has_libio = x"yes"; then
1059 AC_MSG_CHECKING([for glibc version >= 2.2])
1060 AC_EGREP_CPP([ok], [
1061 #include <features.h>
1062 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1065 ], glibc_satisfactory=yes, glibc_satisfactory=no)
1066 AC_MSG_RESULT($glibc_satisfactory)
1070 # XXX at the moment, admit defeat and force the recompilation
1071 # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1072 glibc_satisfactory=no
1074 if test x$glibc_satisfactory = x"yes"; then
1079 # bkoz XXX need to add checks to enable this
1080 # pme XXX here's a first pass at such a check
1081 if test x$enable_c_mbchar != xno; then
1089 # Using libio, but <libio.h> doesn't exist on the target system. . .
1091 # bkoz XXX need to add checks to enable this
1092 # pme XXX here's a first pass at such a check
1093 if test x$enable_c_mbchar != xno; then
1100 xstdio | x | xno | xnone | xyes)
1102 CSTDIO_H=config/c_io_stdio.h
1103 BASIC_FILE_H=config/basic_file_stdio.h
1104 BASIC_FILE_CC=config/basic_file_stdio.cc
1105 AC_MSG_RESULT(stdio)
1107 # We're not using stdio.
1112 echo "$enable_cstdio is an unknown io package" 1>&2
1116 AC_LINK_FILES($CSTDIO_H, include/bits/c++io.h)
1117 AC_LINK_FILES($BASIC_FILE_H, include/bits/basic_file_model.h)
1118 AC_LINK_FILES($BASIC_FILE_CC, src/basic_file.cc)
1120 # 2000-08-04 bkoz hack
1121 CCODECVT_C=config/c_io_libio_codecvt.c
1122 AC_LINK_FILES($CCODECVT_C, libio/c_codecvt.c)
1123 # 2000-08-04 bkoz hack
1125 AM_CONDITIONAL(GLIBCPP_BUILD_LIBIO,
1126 test "$need_libio" = yes || test "$need_wlibio" = yes)
1127 AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1128 AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1129 if test "$need_libio" = yes || test "$need_wlibio" = yes; then
1130 libio_la=../libio/libio.la
1139 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1140 dnl We must stage the required headers so that they will be installed
1141 dnl with the library (unlike libgcc, the STL implementation is provided
1142 dnl solely within headers). Since we must not inject random user-space
1143 dnl macro names into user-provided C++ code, we first stage into <file>-in
1144 dnl and process to <file> with an output command. The reason for a two-
1145 dnl stage process here is to correctly handle $srcdir!=$objdir without
1146 dnl having to write complex code (the sed commands to clean the macro
1147 dnl namespace are complex and fragile enough as it is).
1149 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1150 AC_MSG_CHECKING([for thread model used by GCC])
1151 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
1152 AC_MSG_RESULT([$target_thread_file])
1154 AC_LINK_FILES(../gcc/gthr.h, include/bits/gthr.h-in)
1155 AC_LINK_FILES(../gcc/gthr-single.h, include/bits/gthr-single.h-in)
1156 AC_LINK_FILES(../gcc/gthr-$target_thread_file.h,
1157 include/bits/gthr-default.h-in)
1158 if test $target_thread_file != single; then
1159 AC_DEFINE(HAVE_GTHR_DEFAULT)
1160 AC_DEFINE(_GLIBCPP_SUPPORTS_WEAK, __GXX_WEAK__)
1162 AC_OUTPUT_COMMANDS([d=include/bits
1163 rm -f $d/gthr.h $d/gthr-single.h $d/gthr-default.h
1164 sed '/^#/s/\([A-Z_][A-Z_]*\)/_GLIBCPP_\1/g' <$d/gthr.h-in >$d/gthr.h
1165 sed 's/\(UNUSED\)/_GLIBCPP_\1/g' <$d/gthr-single.h-in \
1166 | sed 's/\(GCC[A-Z_]*_H\)/_GLIBCPP_\1/g' >$d/gthr-single.h
1167 sed 's/\(UNUSED\)/_GLIBCPP_\1/g' <$d/gthr-default.h-in \
1168 | sed 's/\(GCC[A-Z_]*_H\)/_GLIBCPP_\1/g' \
1169 | sed 's/\([A-Z_]*WEAK\)/_GLIBCPP_\1/g' >$d/gthr-default.h])
1174 dnl Check for exception handling support. If an explicit enable/disable
1175 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1176 dnl target may or may not support call frame exceptions.
1178 dnl GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
1179 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1180 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1182 dnl Define _GLIBCPP_SJLJ_EXCEPTIONS if the compiler is configured for it.
1184 AC_DEFUN(GLIBCPP_ENABLE_SJLJ_EXCEPTIONS, [
1185 AC_MSG_CHECKING([for exception model to use])
1188 AC_ARG_ENABLE(sjlj-exceptions,
1189 [ --enable-sjlj-exceptions force use of builtin_setjmp for exceptions],
1191 [dnl Botheration. Now we've got to detect the exception model.
1192 dnl Link tests against libgcc.a are problematic since -- at least
1193 dnl as of this writing -- we've not been given proper -L bits for
1194 dnl single-tree newlib and libgloss.
1196 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
1197 dnl conftest files before we got a change to grep them first.
1198 cat > conftest.$ac_ext << EOF
1199 [#]line __oline__ "configure"
1208 old_CXXFLAGS="$CXXFLAGS"
1210 if AC_TRY_EVAL(ac_compile); then
1211 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1212 enable_sjlj_exceptions=yes
1213 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1214 enable_sjlj_exceptions=no
1217 CXXFLAGS="$old_CXXFLAGS"
1219 if test x$enable_sjlj_exceptions = xyes; then
1220 AC_DEFINE(_GLIBCPP_SJLJ_EXCEPTIONS, 1,
1221 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1222 ac_exception_model_name=sjlj
1223 elif test x$enable_sjlj_exceptions = xno; then
1224 ac_exception_model_name="call frame"
1226 AC_MSG_ERROR([unable to detect exception model])
1229 AC_MSG_RESULT($ac_exception_model_name)
1234 dnl Check for ISO/IEC 9899:1999 "C99" support.
1236 dnl GLIBCPP_ENABLE_C99
1237 dnl --enable-c99 defines _GLIBCPP_USE_C99
1238 dnl --disable-c99 leaves _GLIBCPP_USE_C99 undefined
1239 dnl + Usage: GLIBCPP_ENABLE_C99[(DEFAULT)]
1240 dnl Where DEFAULT is either `yes' or `no'. If omitted, it
1241 dnl defaults to `no'.
1242 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
1244 dnl GLIBCPP_ENABLE_C99
1245 AC_DEFUN(GLIBCPP_ENABLE_C99, [dnl
1246 define([GLIBCPP_ENABLE_C99_DEFAULT], ifelse($1, yes, yes, no))dnl
1249 changequote(<<, >>)dnl
1250 <<--enable-c99 turns on 'ISO/IEC 9899:1999 support' [default=>>GLIBCPP_ENABLE_C99_DEFAULT],
1251 changequote([, ])dnl
1252 [case "$enableval" in
1253 yes) enable_c99=yes ;;
1254 no) enable_c99=no ;;
1255 *) AC_MSG_ERROR([Unknown argument to enable/disable C99]) ;;
1257 enable_c99=GLIBCPP_ENABLE_C99_DEFAULT)dnl
1262 # Check for the existence of <math.h> functions used if C99 is enabled.
1264 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
1265 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
1266 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
1267 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
1268 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
1269 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
1270 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
1271 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
1272 AC_TRY_COMPILE([#include <math.h>],
1273 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
1274 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
1275 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
1276 AC_TRY_COMPILE([#include <math.h>],
1277 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
1278 AC_TRY_COMPILE([#include <math.h>],
1279 [isunordered(0.0,0.0);],, [ac_c99_math=no])
1280 AC_MSG_RESULT($ac_c99_math)
1282 # Check for the existence in <stdio.h> of vscanf, et. al.
1284 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1285 AC_TRY_COMPILE([#include <stdio.h>],
1286 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
1287 AC_TRY_COMPILE([#include <stdio.h>
1289 void foo(char* fmt, ...)
1290 {va_list args; va_start(args, fmt);
1291 vfscanf(stderr, "%i", args);}],
1292 [],, [ac_c99_stdio=no])
1293 AC_TRY_COMPILE([#include <stdio.h>
1295 void foo(char* fmt, ...)
1296 {va_list args; va_start(args, fmt);
1297 vscanf("%i", args);}],
1298 [],, [ac_c99_stdio=no])
1299 AC_TRY_COMPILE([#include <stdio.h>
1301 void foo(char* fmt, ...)
1302 {va_list args; va_start(args, fmt);
1303 vsnprintf(fmt, 0, "%i", args);}],
1304 [],, [ac_c99_stdio=no])
1305 AC_TRY_COMPILE([#include <stdio.h>
1307 void foo(char* fmt, ...)
1308 {va_list args; va_start(args, fmt);
1309 vsscanf(fmt, "%i", args);}],
1310 [],, [ac_c99_stdio=no])
1311 AC_MSG_RESULT($ac_c99_stdio)
1313 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1315 AC_MSG_CHECKING([for lldiv_t declaration])
1316 AC_CACHE_VAL(ac_c99_lldiv_t, [
1317 AC_TRY_COMPILE([#include <stdlib.h>],
1319 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
1321 AC_MSG_RESULT($ac_c99_lldiv_t)
1323 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1324 AC_TRY_COMPILE([#include <stdlib.h>],
1325 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
1326 AC_TRY_COMPILE([#include <stdlib.h>],
1327 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
1328 AC_TRY_COMPILE([#include <stdlib.h>],
1329 [char* tmp; strtoll("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1330 AC_TRY_COMPILE([#include <stdlib.h>],
1331 [char* tmp; strtoull("gnu", &tmp, 10);],, [ac_c99_stdlib=no])
1332 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
1333 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
1334 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
1335 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
1336 if test x"$ac_c99_lldiv_t" = x"no"; then
1339 AC_MSG_RESULT($ac_c99_stdlib)
1341 # Check for the existence of <wchar.h> functions used if C99 is enabled.
1343 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1344 AC_TRY_COMPILE([#include <wchar.h>],
1345 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
1346 AC_TRY_COMPILE([#include <wchar.h>],
1347 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
1348 AC_TRY_COMPILE([#include <wchar.h>],
1349 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
1350 AC_MSG_RESULT($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='${top_srcdir}/include/c_shadow'
1450 AC_DEFINE(_GLIBCPP_USE_SHADOW_HEADERS)
1454 C_INCLUDE_DIR='${top_srcdir}/include/c_std'
1458 C_INCLUDE_DIR='${top_srcdir}/include/c'
1462 AC_SUBST(CSHADOW_FLAGS)
1463 AC_SUBST(C_INCLUDE_DIR)
1464 AM_CONDITIONAL(GLIBCPP_USE_CSHADOW, test "$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 GLIBCPP_INCLUDE_DIR
1499 dnl TOPLEVEL_INCLUDES
1500 dnl LIBMATH_INCLUDES
1501 dnl LIBSUPCXX_INCLUDES
1503 dnl CSHADOW_INCLUDES
1505 dnl GLIBCPP_EXPORT_INCLUDE
1506 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1507 # Root level of the include sources.
1508 GLIBCPP_INCLUDE_DIR='$(top_srcdir)/include'
1510 # Can either use include/c or include/c_std to grab "C" headers. This
1511 # variable is set to the include directory currently in use.
1512 # set with C_INCLUDE_DIR in GLIBCPP_ENABLE_CHEADERS
1514 # Passed down for canadian crosses.
1515 if test x"$CANADIAN" = xyes; then
1516 TOPLEVEL_INCLUDES='-I$(includedir)'
1519 LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1521 LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1523 #if GLIBCPP_NEED_LIBIO
1524 LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1526 #LIBIO_INCLUDES='-I$(top_srcdir)/libio'
1529 #if GLIBCPP_USE_CSHADOW
1530 # CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR) \
1531 # -I$(top_blddir)/cshadow'
1533 CSTD_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR)'
1536 # Now, export this to all the little Makefiles....
1537 AC_SUBST(GLIBCPP_INCLUDE_DIR)
1538 AC_SUBST(TOPLEVEL_INCLUDES)
1539 AC_SUBST(LIBMATH_INCLUDES)
1540 AC_SUBST(LIBSUPCXX_INCLUDES)
1541 AC_SUBST(LIBIO_INCLUDES)
1542 AC_SUBST(CSTD_INCLUDES)
1547 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1549 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1550 # Optimization flags that are probably a good idea for thrill-seekers. Just
1551 # uncomment the lines below and make, everything else is ready to go...
1552 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1554 AC_SUBST(OPTIMIZE_CXXFLAGS)
1556 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings -Winline'
1557 AC_SUBST(WARN_FLAGS)
1561 dnl GLIBCPP_EXPORT_INSTALL_INFO
1562 dnl calculates gxx_install_dir
1563 dnl exports glibcpp_toolexecdir
1564 dnl exports glibcpp_toolexeclibdir
1565 dnl exports glibcpp_builddir
1566 dnl exports glibcpp_srcdir
1567 dnl exports glibcpp_prefixdir
1569 dnl Assumes cross_compiling bits already done, and with_cross_host in
1572 dnl GLIBCPP_EXPORT_INSTALL_INFO
1573 AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [
1575 glibcpp_toolexecdir=no
1576 glibcpp_toolexeclibdir=no
1578 # Export build and source directories.
1579 # These need to be absolute paths, yet at the same time need to
1580 # canonicalize only relative paths, because then amd will not unmount
1581 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
1582 glibcpp_builddir=`pwd`
1584 [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
1585 *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
1587 glibcpp_prefixdir=${prefix}
1589 AC_MSG_CHECKING([for interface version number])
1590 libstdcxx_interface=$INTERFACE
1591 AC_MSG_RESULT($libstdcxx_interface)
1593 # Process the option --with-gxx-include-dir=<path to include-files directory>
1594 AC_MSG_CHECKING([for --with-gxx-include-dir])
1595 AC_ARG_WITH(gxx-include-dir,
1596 [ --with-gxx-include-dir the installation directory for include files],
1597 [case "${withval}" in
1599 AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
1606 gxx_include_dir=${withval}
1608 esac], [gxx_include_dir=no])
1609 AC_MSG_RESULT($gxx_include_dir)
1611 # Process the option "--enable-version-specific-runtime-libs"
1612 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
1613 AC_ARG_ENABLE(version-specific-runtime-libs,
1614 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
1615 [ version_specific_libs=yes
1616 # Need the gcc compiler version to know where to install libraries
1617 # and header files if --enable-version-specific-runtime-libs option
1620 gcc_version_trigger=${srcdir}/../gcc/version.c
1621 gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([^\"]*\)\".*/\1/'`
1622 gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
1623 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/g++
1624 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1625 glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}
1627 ],version_specific_libs=no)
1628 AC_MSG_RESULT($version_specific_libs)
1630 # Default case for install directory for include files.
1631 if test x"$version_specific_libs" = x"no" \
1632 && test x"$gxx_include_dir" = x"no"; then
1633 gxx_include_dir='$(prefix)'/include/g++-${libstdcxx_interface}
1636 # Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir
1637 # Install a library built with a cross compiler in tooldir, not libdir.
1638 if test x"$glibcpp_toolexecdir" = x"no"; then
1639 if test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
1640 glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)'
1641 glibcpp_toolexeclibdir='$(toolexecdir)/lib$(MULTISUBDIR)'
1643 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1644 glibcpp_toolexeclibdir='$(libdir)$(MULTISUBDIR)'
1648 AC_MSG_CHECKING([for install location])
1649 AC_MSG_RESULT($gxx_include_dir)
1651 AC_SUBST(glibcpp_builddir)
1652 AC_SUBST(glibcpp_srcdir)
1653 AC_SUBST(glibcpp_prefixdir)
1654 AC_SUBST(gxx_include_dir)
1655 AC_SUBST(glibcpp_toolexecdir)
1656 AC_SUBST(glibcpp_toolexeclibdir)
1660 # Check whether LC_MESSAGES is available in <locale.h>.
1661 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1663 # This file file be copied and used freely without restrictions. It can
1664 # be used in projects which are not available under the GNU Public License
1665 # but which still want to provide support for the GNU gettext functionality.
1666 # Please note that the actual code is *not* freely available.
1670 AC_DEFUN(AC_LC_MESSAGES, [
1671 AC_CHECK_HEADER(locale.h, [
1672 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1673 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1674 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1675 if test $ac_cv_val_LC_MESSAGES = yes; then
1676 AC_DEFINE(HAVE_LC_MESSAGES)
1682 # Check for functions in math library.
1683 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1685 # This file can be copied and used freely without restrictions. It can
1686 # be used in projects which are not available under the GNU Public License
1687 # but which still want to provide support for the GNU gettext functionality.
1688 # Please note that the actual code is *not* freely available.
1692 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1693 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1694 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])
1695 AC_SUBST(LIBMATHOBJS)dnl
1699 # Check for string functions.
1700 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1702 # This file can be copied and used freely without restrictions. It can
1703 # be used in projects which are not available under the GNU Public License
1704 # but which still want to provide support for the GNU gettext functionality.
1705 # Please note that the actual code is *not* freely available.
1709 dnl AC_REPLACE_STRINGFUNCS(FUNCTION...)
1710 AC_DEFUN(AC_REPLACE_STRINGFUNCS,
1711 [AC_CHECK_FUNCS([$1], , [LIBSTRINGOBJS="$LIBSTRINGOBJS ${ac_func}.lo"])
1712 AC_SUBST(LIBSTRINGOBJS)dnl
1716 dnl This macro searches for a GNU version of make. If a match is found, the
1717 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1718 dnl set to "#". This is useful for including a special features in a Makefile,
1719 dnl which cannot be handled by other versions of make. The variable
1720 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1721 dnl the empty string otherwise.
1723 dnl Here is an example of its use:
1725 dnl Makefile.in might contain:
1727 dnl # A failsafe way of putting a dependency rule into a makefile
1729 dnl $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1731 dnl @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1732 dnl @ifGNUmake@ include $(DEPEND)
1733 dnl @ifGNUmake@ endif
1735 dnl Then configure.in would normally contain:
1737 dnl CHECK_GNU_MAKE()
1738 dnl AC_OUTPUT(Makefile)
1740 dnl Then perhaps to cause gnu make to override any other make, we could do
1741 dnl something like this (note that GNU make always looks for GNUmakefile first):
1743 dnl if ! test x$_cv_gnu_make_command = x ; then
1744 dnl mv Makefile GNUmakefile
1745 dnl echo .DEFAULT: > Makefile ;
1746 dnl echo \ $_cv_gnu_make_command \$@ >> Makefile;
1749 dnl Then, if any (well almost any) other make is called, and GNU make also
1750 dnl exists, then the other make wraps the GNU make.
1752 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1753 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1755 dnl #### Changes for libstdc++-v3: reformatting and linewrapping; prepending
1756 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1757 dnl #### conditional's subshell (" --version" is not a command), using a
1758 dnl #### different option to grep(1).
1760 dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not
1761 dnl #### ${MAKE:-make}).
1764 GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
1765 _cv_gnu_make_command='' ;
1766 dnl Search all the common names for GNU make
1767 for a in "${MAKE-make}" make gmake gnumake ; do
1768 if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
1770 _cv_gnu_make_command=$a ;
1775 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
1776 dnl string, '#' otherwise
1777 if test "x$_cv_gnu_make_command" != "x" ; then
1785 sinclude(../libtool.m4)
1786 dnl The lines below arrange for aclocal not to bring an installed
1787 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1788 dnl add a definition of LIBTOOL to Makefile.in.
1789 ifelse(,,,[AC_SUBST(LIBTOOL)
1790 AC_DEFUN([AM_PROG_LIBTOOL])
1791 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1792 AC_DEFUN([AC_PROG_LD])
1797 # Do all the work for Automake. This macro actually does too much --
1798 # some checks are only needed if your package does certain things.
1799 # But this isn't really a big deal.
1804 dnl AM_INIT_AUTOMAKE(package,version, [no-define])
1806 AC_DEFUN(AM_INIT_AUTOMAKE,
1807 [AC_REQUIRE([AC_PROG_INSTALL])
1812 dnl test to see if srcdir already configured
1813 if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
1814 AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
1817 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of package])
1818 AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version number of package]))
1819 AC_REQUIRE([AM_SANITY_CHECK])
1820 AC_REQUIRE([AC_ARG_PROGRAM])
1821 dnl FIXME This is truly gross.
1822 missing_dir=`cd $ac_aux_dir && pwd`
1823 AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
1824 AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
1825 AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
1826 AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
1827 AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
1828 AC_REQUIRE([AC_PROG_MAKE_SET])])
1831 # Check to make sure that the build environment is sane.
1834 AC_DEFUN(AM_SANITY_CHECK,
1835 [AC_MSG_CHECKING([whether build environment is sane])
1838 echo timestamp > conftestfile
1839 # Do `set' in a subshell so we don't clobber the current shell's
1840 # arguments. Must try -L first in case configure is actually a
1841 # symlink; some systems play weird games with the mod time of symlinks
1842 # (eg FreeBSD returns the mod time of the symlink's containing
1845 set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
1846 if test "[$]*" = "X"; then
1848 set X `ls -t $srcdir/configure conftestfile`
1850 if test "[$]*" != "X $srcdir/configure conftestfile" \
1851 && test "[$]*" != "X conftestfile $srcdir/configure"; then
1853 # If neither matched, then we have a broken ls. This can happen
1854 # if, for instance, CONFIG_SHELL is bash and it inherits a
1855 # broken ls alias from the environment. This has actually
1856 # happened. Such a system could not be considered "sane".
1857 AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
1858 alias in your environment])
1861 test "[$]2" = conftestfile
1867 AC_MSG_ERROR([newly created file is older than distributed files!
1868 Check your system clock])
1871 AC_MSG_RESULT(yes)])
1873 dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
1874 dnl The program must properly implement --version.
1875 AC_DEFUN(AM_MISSING_PROG,
1876 [AC_MSG_CHECKING(for working $2)
1877 # Run test in a subshell; some versions of sh will print an error if
1878 # an executable is not found, even if stderr is redirected.
1879 # Redirect stdin to placate older versions of autoconf. Sigh.
1880 if ($2 --version) < /dev/null > /dev/null 2>&1; then
1882 AC_MSG_RESULT(found)
1885 AC_MSG_RESULT(missing)
1889 # Add --enable-maintainer-mode option to configure.
1894 AC_DEFUN(AM_MAINTAINER_MODE,
1895 [AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
1896 dnl maintainer-mode is disabled by default
1897 AC_ARG_ENABLE(maintainer-mode,
1898 [ --enable-maintainer-mode enable make rules and dependencies not useful
1899 (and sometimes confusing) to the casual installer],
1900 USE_MAINTAINER_MODE=$enableval,
1901 USE_MAINTAINER_MODE=no)
1902 AC_MSG_RESULT($USE_MAINTAINER_MODE)
1903 AM_CONDITIONAL(MAINTAINER_MODE, test $USE_MAINTAINER_MODE = yes)
1904 MAINT=$MAINTAINER_MODE_TRUE
1909 # Define a conditional.
1911 AC_DEFUN(AM_CONDITIONAL,
1922 # Like AC_CONFIG_HEADER, but automatically create stamp file.
1924 AC_DEFUN(AM_CONFIG_HEADER,
1926 AC_CONFIG_HEADER([$1])
1927 dnl When config.status generates a header, we must update the stamp-h file.
1928 dnl This file resides in the same directory as the config header
1929 dnl that is generated. We must strip everything past the first ":",
1930 dnl and everything past the last "/".
1931 AC_OUTPUT_COMMANDS(changequote(<<,>>)dnl
1932 ifelse(patsubst(<<$1>>, <<[^ ]>>, <<>>), <<>>,
1933 <<test -z "<<$>>CONFIG_HEADERS" || echo timestamp > patsubst(<<$1>>, <<^\([^:]*/\)?.*>>, <<\1>>)stamp-h<<>>dnl>>,
1935 for am_file in <<$1>>; do
1936 case " <<$>>CONFIG_HEADERS " in
1937 *" <<$>>am_file "*<<)>>
1938 echo timestamp > `echo <<$>>am_file | sed -e 's%:.*%%' -e 's%[^/]*$%%'`stamp-h$am_indx
1941 am_indx=`expr "<<$>>am_indx" + 1`