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++, 2.91)
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, $CCC c++ g++ gcc CC cxx cc++, gcc)
100 test -z "$glibcpp_CXX" && AC_MSG_ERROR([no acceptable c++ found in \$PATH])
104 if test $ac_cv_prog_gxx = yes; then
106 dnl Check whether -g works, even if CXXFLAGS is set, in case the package
107 dnl plays around with CXXFLAGS (such as to build both debugging and
108 dnl normal versions of a library), tasteless as that idea is.
109 ac_test_CXXFLAGS="${CXXFLAGS+set}"
110 ac_save_CXXFLAGS="$CXXFLAGS"
113 if test "$ac_test_CXXFLAGS" = set; then
114 CXXFLAGS="$ac_save_CXXFLAGS"
115 elif test $ac_cv_prog_cxx_g = yes; then
122 test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
128 AC_CHECK_TOOL(AS, as)
129 AC_CHECK_TOOL(AR, ar)
130 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
131 AC_CHECK_TOOL(glibcpp_expect, expect, expect-not-found-in-path-error)
132 AC_CHECK_TOOL(glibcpp_runtest, runtest, runtest-not-found-in-path-error)
133 AC_SUBST(glibcpp_expect)
134 AC_SUBST(glibcpp_runtest)
139 # We need AC_EXEEXT to keep automake happy in cygnus mode. However,
140 # at least currently, we never actually build a program, so we never
141 # need to use $(EXEEXT). Moreover, the test for EXEEXT normally
142 # fails, because we are probably configuring with a cross compiler
143 # which cant create executables. So we include AC_EXEEXT to keep
144 # automake happy, but we dont execute it, since we dont care about
150 . [$]{glibcpp_basedir}/configure.host
152 case [$]{glibcpp_basedir} in
153 /* | [A-Za-z]:[\\/]*) libgcj_flagbasedir=[$]{glibcpp_basedir} ;;
154 *) glibcpp_flagbasedir='[$](top_builddir)/'[$]{glibcpp_basedir} ;;
157 # This does for the target what configure.host does for the host. In
158 # addition to possibly modifying the same flags, it also sets up symlinks.
164 dnl Check to see if g++ can compile this library, and if so, if any version-
165 dnl specific precautions need to be taken.
167 dnl GLIBCPP_CHECK_COMPILER_VERSION
168 AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [
169 if test ! -f stamp-sanity-compiler; then
170 AC_MSG_CHECKING([for g++ that will successfully compile libstdc++-v3])
177 ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to GCC 3.0 or above]))
179 AC_MSG_RESULT($gpp_satisfactory)
180 touch stamp-sanity-compiler
186 dnl Test for newer compiler features, or features that are present in newer
187 dnl compiler version but not older compiler versions should be placed
190 dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the
191 dnl new inlining code or the new system_header pragma will die on -Werror.
192 dnl Leave it out by default and use maint-mode to use it.
194 dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if
195 dnl compiler supports it and the user has not requested debug mode.
197 dnl GLIBCPP_CHECK_COMPILER_FEATURES
198 AC_DEFUN(GLIBCPP_CHECK_COMPILER_FEATURES, [
199 # All these tests are for C++; save the language and the compiler flags.
200 # The CXXFLAGS thing is suspicious, but based on similar bits
201 # found in GLIBCPP_CONFIGURE.
204 ac_test_CXXFLAGS="${CXXFLAGS+set}"
205 ac_save_CXXFLAGS="$CXXFLAGS"
207 # Check for maintainer-mode bits.
208 if test x"$USE_MAINTAINER_MODE" = xno; then
214 # Check for -ffunction-sections -fdata-sections
215 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
216 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
217 AC_TRY_COMPILE(, [int foo;
218 ], [ac_fdsections=yes], [ac_fdsections=no])
219 if test "$ac_test_CXXFLAGS" = set; then
220 CXXFLAGS="$ac_save_CXXFLAGS"
222 # this is the suspicious part
225 if test x"$ac_fdsections" = x"yes" && test x"$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"$ac_cv_prog_gnu_ld" = x"yes" && test x"$enable_debug" = x"no"; then
293 OPT_LDFLAGS='-Wl,-O1'
296 AC_SUBST(SECTION_LDFLAGS)
297 AC_SUBST(OPT_LDFLAGS)
302 dnl Check to see if the (math function) argument passed is
303 dnl declared when using the c++ compiler
304 dnl ASSUMES argument is a math function with ONE parameter
306 dnl GLIBCPP_CHECK_MATH_DECL_1
307 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_1, [
308 AC_MSG_CHECKING([for $1 declaration])
309 if test x${glibcpp_cv_func_$1_use+set} != xset; then
310 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
313 AC_TRY_COMPILE([#include <math.h>
319 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
323 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
327 dnl Check to see if the (math function) argument passed is
328 dnl 1) declared when using the c++ compiler
329 dnl 2) has "C" linkage
330 dnl 3) if not, see if 1) and 2) for argument prepended with '_'
332 dnl Define HAVE_CARGF etc if "cargf" is declared and links
334 dnl argument 1 is name of function to check
336 dnl ASSUMES argument is a math function with ONE parameter
338 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1
339 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, [
340 GLIBCPP_CHECK_MATH_DECL_1($1)
341 if test x$glibcpp_cv_func_$1_use = x"yes"; then
344 GLIBCPP_CHECK_MATH_DECL_1(_$1)
345 if test x$glibcpp_cv_func__$1_use = x"yes"; then
353 dnl Like GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, but does a bunch of
354 dnl of functions at once. It's an all-or-nothing check -- either
355 dnl HAVE_XYZ is defined for each of the functions, or for none of them.
356 dnl Doing it this way saves significant configure time.
357 AC_DEFUN(GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1, [
358 AC_MSG_CHECKING([for $1 functions])
359 AC_CACHE_VAL(glibcpp_cv_func_$2_use, [
362 AC_TRY_COMPILE([#include <math.h>],
363 [ `for x in $3; do echo "$x (0);"; done` ],
364 [glibcpp_cv_func_$2_use=yes],
365 [glibcpp_cv_func_$2_use=no])
367 AC_MSG_RESULT($glibcpp_cv_func_$2_use)
368 if test x$glibcpp_cv_func_$2_use = x"yes"; then
374 dnl Check to see if the (math function) argument passed is
375 dnl declared when using the c++ compiler
376 dnl ASSUMES argument is a math function with ONE parameter
378 dnl GLIBCPP_CHECK_MATH_DECL_2
379 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_2, [
380 AC_MSG_CHECKING([for $1 declaration])
381 if test x${glibcpp_cv_func_$1_use+set} != xset; then
382 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
385 AC_TRY_COMPILE([#include <math.h>],
387 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
391 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
395 dnl Check to see if the (math function) argument passed is
396 dnl 1) declared when using the c++ compiler
397 dnl 2) has "C" linkage
399 dnl Define HAVE_CARGF etc if "cargf" is declared and links
401 dnl argument 1 is name of function to check
403 dnl ASSUMES argument is a math function with TWO parameters
405 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2
406 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2, [
407 GLIBCPP_CHECK_MATH_DECL_2($1)
408 if test x$glibcpp_cv_func_$1_use = x"yes"; then
411 GLIBCPP_CHECK_MATH_DECL_2(_$1)
412 if test x$glibcpp_cv_func__$1_use = x"yes"; then
420 dnl Check to see if the (math function) argument passed is
421 dnl declared when using the c++ compiler
422 dnl ASSUMES argument is a math function with ONE parameter
424 dnl GLIBCPP_CHECK_MATH_DECL_3
425 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_3, [
426 AC_MSG_CHECKING([for $1 declaration])
427 if test x${glibcpp_cv_func_$1_use+set} != xset; then
428 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
431 AC_TRY_COMPILE([#include <math.h>],
433 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
437 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
441 dnl Check to see if the (math function) argument passed is
442 dnl 1) declared when using the c++ compiler
443 dnl 2) has "C" linkage
445 dnl Define HAVE_CARGF etc if "cargf" is declared and links
447 dnl argument 1 is name of function to check
449 dnl ASSUMES argument is a math function with THREE parameters
451 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3
452 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3, [
453 GLIBCPP_CHECK_MATH_DECL_3($1)
454 if test x$glibcpp_cv_func_$1_use = x"yes"; then
457 GLIBCPP_CHECK_MATH_DECL_3(_$1)
458 if test x$glibcpp_cv_func__$1_use = x"yes"; then
466 dnl Check to see if the (stdlib function) argument passed is
467 dnl 1) declared when using the c++ compiler
468 dnl 2) has "C" linkage
470 dnl Define HAVE_STRTOLD if "strtold" is declared and links
471 dnl Define HAVE_STRTOF if "strtof" is declared and links
473 dnl argument 1 is name of function to check
475 dnl ASSUMES argument is a math function with TWO parameters
477 dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2
478 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
479 AC_MSG_CHECKING([for $1 declaration])
480 if test x${glibcpp_cv_func_$1_use+set} != xset; then
481 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
484 AC_TRY_COMPILE([#include <stdlib.h>],
486 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
490 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
491 if test x$glibcpp_cv_func_$1_use = x"yes"; then
498 dnl Because the builtins are picky picky picky about the arguments they take,
499 dnl do an explict linkage tests here.
500 dnl Check to see if the (math function) argument passed is
501 dnl 1) declared when using the c++ compiler
502 dnl 2) has "C" linkage
504 dnl Define HAVE_CARGF etc if "cargf" is declared and links
506 dnl argument 1 is name of function to check
508 dnl ASSUMES argument is a math function with ONE parameter
510 dnl GLIBCPP_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
511 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
512 AC_MSG_CHECKING([for $1 declaration])
513 if test x${glibcpp_cv_func_$1_use+set} != xset; then
514 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
517 AC_TRY_COMPILE([#include <math.h>],
519 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
523 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
524 if test x$glibcpp_cv_func_$1_use = x"yes"; then
525 AC_MSG_CHECKING([for $1 linkage])
526 if test x${glibcpp_cv_func_$1_link+set} != xset; then
527 AC_CACHE_VAL(glibcpp_cv_func_$1_link, [
528 AC_TRY_LINK([#include <math.h>],
530 [glibcpp_cv_func_$1_link=yes], [glibcpp_cv_func_$1_link=no])
533 AC_MSG_RESULT($glibcpp_cv_func_$1_link)
534 if test x$glibcpp_cv_func_$1_link = x"yes"; then
535 ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
536 AC_DEFINE_UNQUOTED(${ac_tr_func})
543 dnl Check to see what builtin math functions are supported
545 dnl check for __builtin_abs
546 dnl check for __builtin_fabsf
547 dnl check for __builtin_fabs
548 dnl check for __builtin_fabl
549 dnl check for __builtin_labs
550 dnl check for __builtin_sqrtf
551 dnl check for __builtin_sqrtl
552 dnl check for __builtin_fsqrt
553 dnl check for __builtin_sinf
554 dnl check for __builtin_sin
555 dnl check for __builtin_sinl
556 dnl check for __builtin_cosf
557 dnl check for __builtin_cos
558 dnl check for __builtin_cosl
560 dnl GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
561 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT, [
562 dnl Test for builtin math functions.
563 dnl These are made in gcc/c-common.c
564 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
565 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
566 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
567 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
568 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
570 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
571 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fsqrt)
572 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
574 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
575 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
576 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
578 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
579 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
580 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
582 dnl There is, without a doubt, a more elegant way to have these
583 dnl names exported so that they won't be stripped out of acconfig.h by
584 dnl autoheader. I leave this as an exercise to somebody less frustrated
585 dnl than I.... please email the libstdc++ list if you can figure out a
586 dnl more elegant approach (see autoconf/acgen.m4 and specifically
587 dnl AC_CHECK_FUNC for things to steal.)
589 if test x$dummyvar = x"yes"; then
590 AC_DEFINE(HAVE___BUILTIN_ABS)
591 AC_DEFINE(HAVE___BUILTIN_LABS)
592 AC_DEFINE(HAVE___BUILTIN_COS)
593 AC_DEFINE(HAVE___BUILTIN_COSF)
594 AC_DEFINE(HAVE___BUILTIN_COSL)
595 AC_DEFINE(HAVE___BUILTIN_FABS)
596 AC_DEFINE(HAVE___BUILTIN_FABSF)
597 AC_DEFINE(HAVE___BUILTIN_FABSL)
598 AC_DEFINE(HAVE___BUILTIN_SIN)
599 AC_DEFINE(HAVE___BUILTIN_SINF)
600 AC_DEFINE(HAVE___BUILTIN_SINL)
601 AC_DEFINE(HAVE___BUILTIN_FSQRT)
602 AC_DEFINE(HAVE___BUILTIN_SQRTF)
603 AC_DEFINE(HAVE___BUILTIN_SQRTL)
609 dnl Check to see what the underlying c library
610 dnl These checks need to do two things:
611 dnl 1) make sure the name is declared when using the c++ compiler
612 dnl 2) make sure the name has "C" linkage
613 dnl This might seem like overkill but experience has shown that it's not...
615 dnl Define HAVE_STRTOF etc if "strtof" is found.
616 dnl Define HAVE_STRTOLD etc if "strtold" is found.
618 dnl GLIBCPP_CHECK_STDLIB_SUPPORT
619 AC_DEFUN(GLIBCPP_CHECK_STDLIB_SUPPORT, [
620 ac_test_CXXFLAGS="${CXXFLAGS+set}"
621 ac_save_CXXFLAGS="$CXXFLAGS"
622 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
624 AC_CHECK_FUNCS(strtof)
625 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
627 CXXFLAGS="$ac_save_CXXFLAGS"
632 dnl Check to see what the underlying c library or math library is like.
633 dnl These checks need to do two things:
634 dnl 1) make sure the name is declared when using the c++ compiler
635 dnl 2) make sure the name has "C" linkage
636 dnl This might seem like overkill but experience has shown that it's not...
638 dnl Define HAVE_CARGF etc if "cargf" is found.
640 dnl GLIBCPP_CHECK_MATH_SUPPORT
641 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
642 ac_test_CXXFLAGS="${CXXFLAGS+set}"
643 ac_save_CXXFLAGS="$CXXFLAGS"
644 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
647 AC_CHECK_LIB(m, sin, libm="-lm")
651 dnl Check to see if certain C math functions exist.
652 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
653 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
654 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
655 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
656 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
657 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
658 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
660 dnl Check to see if basic C math functions have float versions.
661 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
666 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
669 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
670 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
671 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
672 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
673 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
674 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
675 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
676 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
677 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
678 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
679 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
680 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
681 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
683 dnl Check to see if basic C math functions have long double versions.
684 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
689 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
692 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
693 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
694 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
695 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
696 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
697 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
698 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
699 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
700 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
701 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
702 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
703 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
704 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
705 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
706 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
707 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
709 dnl Some runtimes have these functions with a preceding underscore. Please
710 dnl keep this sync'd with the one above. And if you add any new symbol,
711 dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
712 dnl Check to see if certain C math functions exist.
714 dnl Check to see if basic C math functions have float versions.
715 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig,
717 _acosf _asinf _atanf \
719 _coshf _sinhf _tanhf)
720 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round,
724 dnl Check to see if basic C math functions have long double versions.
725 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig,
727 _acosl _asinl _atanl \
729 _coshl _sinhl _tanhl)
730 GLIBCPP_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round,
735 CXXFLAGS="$ac_save_CXXFLAGS"
740 dnl Check to see if there is native support for complex
742 dnl Don't compile bits in math/* if native support exits.
744 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "atan2l/copysignl" is found.
746 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
747 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
748 dnl Check for complex versions of math functions of platform.
749 AC_CHECK_LIB(m, main)
750 AC_REPLACE_MATHFUNCS(nan hypot hypotf atan2f expf copysignf)
752 dnl Compile the long double complex functions only if the function
753 dnl provides the non-complex long double functions that are needed.
754 dnl Currently this includes copysignl and atan2l, which should be
755 dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
756 USE_COMPLEX_LONG_DOUBLE=no
757 if test x$ac_cv_func_atan2l = x"yes" \
758 && test x$ac_cv_func_copysignl = x"yes"; then
759 USE_COMPLEX_LONG_DOUBLE=yes
760 AC_REPLACE_MATHFUNCS(hypotl signbitl)
763 AC_SUBST(USE_COMPLEX_LONG_DOUBLE)
767 dnl Check to see what architecture and operating system we are compiling
768 dnl for. Also, if architecture- or OS-specific flags are required for
769 dnl compilation, pick them up here.
771 dnl GLIBCPP_CHECK_TARGET
772 AC_DEFUN(GLIBCPP_CHECK_TARGET, [
773 . [$]{glibcpp_basedir}/configure.target
774 AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
775 AC_MSG_RESULT(OS config directory is $os_include_dir)
776 AC_LINK_FILES($os_include_dir/bits/os_defines.h, include/bits/os_defines.h)
781 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
782 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
783 dnl must have been previously checked.)
785 dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found
786 dnl Define HAVE_MBSTATE_T if mbstate_t is not in wchar.h
788 dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT
789 AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [
791 dnl Test wchar.h for mbstate_t, which is needed for char_traits and
792 dnl others even if wchar_t support is not on.
793 AC_MSG_CHECKING([for mbstate_t])
794 AC_TRY_COMPILE([#include <wchar.h>],
795 [mbstate_t teststate;],
796 have_mbstate_t=yes, have_mbstate_t=no)
797 AC_MSG_RESULT($have_mbstate_t)
798 if test x"$have_mbstate_t" = xyes; then
799 AC_DEFINE(HAVE_MBSTATE_T)
802 dnl Sanity check for existence of ISO C99 headers for extended encoding.
803 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
804 AC_CHECK_HEADER(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
806 dnl Only continue checking if the ISO C99 headers exist and support is on.
807 if test x"$ac_has_wchar_h" = xyes && test x"$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($has_weof)
828 dnl Tests for wide character functions used in char_traits<wchar_t>.
829 AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset \
830 wcsrtombs mbsrtowcs, ac_wfuncs=yes, ac_wfuncs=no)
832 AC_MSG_CHECKING([for ISO C99 wchar_t support])
833 if test x"$has_weof" = xyes && test x"$has_wchar_minmax" = xyes \
834 && test x"$ac_wfuncs" = xyes; then
835 ac_isoC99_wchar_t=yes
839 AC_MSG_RESULT($ac_isoC99_wchar_t)
841 dnl Use iconv for wchar_t to char conversions. As such, check for
842 dnl X/Open Portability Guide, version 2 features (XPG2).
843 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
844 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
846 dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
847 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
849 LIBS="$LIBS $libiconv"
851 AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
852 ac_XPG2funcs=yes, ac_XPG2funcs=no)
856 AC_MSG_CHECKING([for XPG2 wchar_t support])
857 if test x"$ac_has_iconv_h" = xyes && test x"$ac_has_langinfo_h" = xyes \
858 && test x"$ac_XPG2funcs" = xyes; then
863 AC_MSG_RESULT($ac_XPG2_wchar_t)
865 dnl At the moment, only enable wchar_t specializations if all the
866 dnl above support is present.
867 AC_MSG_CHECKING([for enabled wchar_t specializations])
868 if test x"$ac_isoC99_wchar_t" = xyes \
869 && test x"$ac_XPG2_wchar_t" = xyes; then
870 AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
876 dnl Wide characters disabled by the user.
877 AC_MSG_WARN([wchar_t support disabled.])
883 dnl Check to see if this version of GNU C++ is afflicted by bugs in
884 dnl __complex__ float support.
886 dnl Define _GLIBCPP_BUGGY_FLOAT_COMPLEX if buggy.
888 dnl Check to see if this version of GNU C++ is afflicted by bugs in
889 dnl __complex__ support.Check for buggy __complex__ that will cause ICE in
890 dnl gcc-2.95.x when using the library, unless we define the default copy
891 dnl ctor in the specializations of complex<>.
893 dnl Define _GLIBCPP_BUGGY_COMPLEX if buggy.
894 dnl GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT
895 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT, [
896 AC_REQUIRE([AC_PROG_CXX])
898 AC_MSG_CHECKING([for GNU C++ __complex__ support])
899 AC_CACHE_VAL(glibcpp_cv_complex, [
902 AC_TRY_COMPILE([struct dcomplex { __complex__ double x; }; \
903 dcomplex f(const dcomplex& x) { return dcomplex(x); }], \
904 [ dcomplex x; f(x); ],
905 glibcpp_cv_complex=ok,
906 glibcpp_cv_complex=buggy
910 AC_MSG_RESULT($glibcpp_cv_complex)
911 if test $glibcpp_cv_complex = buggy; then
912 AC_DEFINE(_GLIBCPP_BUGGY_COMPLEX)
915 AC_MSG_CHECKING([for GNU C++ __complex__ float support])
916 AC_CACHE_VAL(glibcpp_cv_float_complex, [
920 cat > conftest.h <<EOB
922 // Check for buggy __complex__ that causes ICE in most versions of egcs
923 // and gcc-2.95.x on certain platforms (eg., x86-win32).
925 // See http://gcc.gnu.org/ml/gcc-bugs/1999-07n/msg00845.html for
926 // more info on the bug itself.
931 __complex__ float m_value;
932 float_complex (float = 0.0f, float = 0.0f);
933 float_complex (__complex__ float val) : m_value (val) {}
934 float_complex foo (const float_complex &val)
935 { return float_complex (~val.m_value); }
938 AC_TRY_COMPILE([#include "conftest.h"], ,
939 glibcpp_cv_float_complex=ok,
940 glibcpp_cv_float_complex=buggy
944 AC_MSG_RESULT($glibcpp_cv_float_complex)
945 if test $glibcpp_cv_float_complex = buggy; then
946 AC_DEFINE(_GLIBCPP_BUGGY_FLOAT_COMPLEX)
952 dnl Check for special debugging mode; not for production use.
954 dnl GLIBCPP_ENABLE_DEBUG
955 dnl --enable-debug sets '-ggdb3 -O0'.
956 dnl --disable-debug sets '-g' and whatever optimization options the
957 dnl compiler can handle.
958 dnl + --enable-maintainer-mode automatically defaults this to on.
959 dnl + Perhaps -D/-U of NDEBUG, DEBUG, DEBUG_ASSERT, ...?
960 dnl + Usage: GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
961 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
962 dnl defaults to `no'.
963 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
964 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
966 changequote(<<, >>)dnl
967 << --enable-debug extra debugging, turn off optimization [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
969 [case "${enableval}" in
970 yes) enable_debug=yes ;;
971 no) enable_debug=no ;;
972 *) AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
974 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
976 dnl Option parsed, now set things appropriately
977 case "${enable_debug}" in
979 DEBUG_FLAGS='-O0 -ggdb3'
985 AC_SUBST(DEBUG_FLAGS)
990 dnl Check for "unusual" flags to pass to the compiler while building.
992 dnl GLIBCPP_ENABLE_CXX_FLAGS
993 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
994 dnl experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
995 dnl Somehow this same set of flags must be passed when [re]building
997 dnl --disable-cxx-flags passes nothing.
998 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
999 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1000 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1001 dnl + Usage: GLIBCPP_ENABLE_CXX_FLAGS(default flags)
1002 dnl If "default flags" is an empty string (or "none"), the effect is
1003 dnl the same as --disable or --enable=no.
1004 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
1005 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
1006 AC_ARG_ENABLE(cxx-flags,
1007 changequote(<<, >>)dnl
1008 << --enable-cxx-flags=FLAGS pass compiler FLAGS when building library;
1009 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
1010 changequote([, ])dnl
1011 [case "x$enableval" in
1013 AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
1015 enable_cxx_flags='' ;;
1017 enable_cxx_flags="$enableval" ;;
1019 enable_cxx_flags='GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT')
1021 dnl Thinko on my part during design. This kludge is the workaround.
1022 if test "$enable_cxx_flags" = "none"; then
1023 enable_cxx_flags='';
1026 dnl Run through flags (either default or command-line) and set anything
1027 dnl extra (e.g., #defines) that must accompany particular g++ options.
1028 if test -n "$enable_cxx_flags"; then
1029 for f in $enable_cxx_flags; do
1033 *) # and we're trying to pass /what/ exactly?
1034 AC_MSG_ERROR([compiler flags start with a -]) ;;
1038 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1039 AC_SUBST(EXTRA_CXX_FLAGS)
1044 dnl Check for which locale library to use: gnu or generic.
1046 dnl GLIBCPP_ENABLE_CLOCALE
1047 dnl --enable-clocale=gnu sets config/c_locale_gnu.cc and friends
1048 dnl --enable-clocale=generic sets config/c_locale_generic.cc and friends
1050 dnl default is generic
1052 AC_DEFUN(GLIBCPP_ENABLE_CLOCALE, [
1053 AC_MSG_CHECKING([for clocale to use])
1054 AC_ARG_ENABLE(clocale,
1055 [ --enable-clocale enable model for target locale package.
1056 --enable-clocale=MODEL use MODEL target-speific locale package. [default=generic]
1058 if test x$enable_clocale = xno; then
1059 enable_clocale=generic
1061 enable_clocale=generic)
1063 enable_clocale_flag=$enable_clocale
1065 dnl Check if a valid locale package
1066 case x${enable_clocale_flag} in
1068 CLOCALE_H=config/c_locale_gnu.h
1069 CLOCALE_CC=config/c_locale_gnu.cc
1073 CLOCALE_H=config/c_locale_generic.h
1074 CLOCALE_CC=config/c_locale_generic.cc
1075 AC_MSG_RESULT(generic)
1078 echo "$enable_clocale is an unknown locale package" 1>&2
1083 AC_LINK_FILES($CLOCALE_H, include/bits/c++locale.h)
1084 AC_LINK_FILES($CLOCALE_CC, src/c++locale.cc)
1089 dnl Check for which I/O library to use: libio, or something specific.
1091 dnl GLIBCPP_ENABLE_CSTDIO
1092 dnl --enable-cstdio=libio sets config/c_io_libio.h and friends
1094 dnl default is stdio
1096 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1097 AC_MSG_CHECKING([for cstdio to use])
1098 AC_ARG_ENABLE(cstdio,
1099 [ --enable-cstdio enable stdio for target io package.
1100 --enable-cstdio=LIB use LIB target-speific io package. [default=stdio]
1102 if test x$enable_cstdio = xno; then
1105 enable_cstdio=stdio)
1107 enable_cstdio_flag=$enable_cstdio
1109 dnl Check if a valid I/O package
1110 case x${enable_cstdio_flag} in
1112 CSTDIO_H=config/c_io_libio.h
1113 BASIC_FILE_H=config/basic_file_libio.h
1114 BASIC_FILE_CC=config/basic_file_libio.cc
1115 AC_MSG_RESULT(libio)
1117 # see if we are on a system with libio native (ie, linux)
1118 AC_CHECK_HEADER(libio.h, has_libio=yes, has_libio=no)
1120 # Need to check and see what version of glibc is being used. If
1121 # it's not glibc-2.2 or higher, then we'll need to go ahead and
1122 # compile most of libio for linux systems.
1123 if test x$has_libio = x"yes"; then
1126 AC_MSG_CHECKING([for glibc version >= 2.2])
1127 AC_EGREP_CPP([ok], [
1128 #include <features.h>
1129 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1132 ], glibc_satisfactory=yes, glibc_satisfactory=no)
1133 AC_MSG_RESULT($glibc_satisfactory)
1137 # XXX at the moment, admit defeat and force the recompilation
1138 # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1139 glibc_satisfactory=no
1141 if test x$glibc_satisfactory = x"yes"; then
1146 # bkoz XXX need to add checks to enable this
1147 # pme XXX here's a first pass at such a check
1148 if test x$enable_c_mbchar != xno; then
1156 # Using libio, but <libio.h> doesn't exist on the target system. . .
1158 # bkoz XXX need to add checks to enable this
1159 # pme XXX here's a first pass at such a check
1160 if test x$enable_c_mbchar != xno; then
1167 xstdio | x | xno | xnone | xyes)
1169 CSTDIO_H=config/c_io_stdio.h
1170 BASIC_FILE_H=config/basic_file_stdio.h
1171 BASIC_FILE_CC=config/basic_file_stdio.cc
1172 AC_MSG_RESULT(stdio)
1174 # We're not using stdio.
1179 echo "$enable_cstdio is an unknown io package" 1>&2
1183 AC_LINK_FILES($CSTDIO_H, include/bits/c++io.h)
1184 AC_LINK_FILES($BASIC_FILE_H, include/bits/basic_file_model.h)
1185 AC_LINK_FILES($BASIC_FILE_CC, src/basic_file.cc)
1187 # 2000-08-04 bkoz hack
1188 CCODECVT_C=config/c_io_libio_codecvt.c
1189 AC_LINK_FILES($CCODECVT_C, libio/c_codecvt.c)
1190 # 2000-08-04 bkoz hack
1192 AM_CONDITIONAL(GLIBCPP_BUILD_LIBIO,
1193 test "$need_libio" = yes || test "$need_wlibio" = yes)
1194 AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1195 AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1196 if test "$need_libio" = yes || test "$need_wlibio" = yes; then
1197 libio_la=../libio/libio.la
1206 dnl Check for which threading library to use.
1208 dnl GLIBCPP_ENABLE_THREADS
1209 dnl --enable-threads=posix sets config/threads-posix.h et. al.
1211 dnl Default is no threads, which also disables _IO_MTSAFE_IO in
1212 dnl libio. Any actual thread package will enable it.
1214 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1215 dnl Note this comes from the gcc/config.in and libjava/config.in
1216 dnl Efforts should be made to keep this in sync.
1217 AC_MSG_CHECKING([for threads package to use])
1218 AC_ARG_ENABLE(threads,
1219 [ --enable-threads enable thread usage for target GCC.
1220 --enable-threads=LIB use LIB thread package for target GCC. [default=no]
1222 if test x$enable_threads = xno; then
1227 enable_threads_flag=$enable_threads
1229 dnl Check if a valid thread package
1230 case x${enable_threads_flag} in
1233 target_thread_file='single'
1237 target_thread_file='posix'
1239 xdecosf1 | xirix | xmach | xos2 | xposix | xpthreads | xsingle | \
1240 xsolaris | xwin32 | xdce | xvxworks)
1241 target_thread_file=$enable_threads_flag
1244 echo "$enable_threads is an unknown thread package" 1>&2
1249 dnl Check for thread package actually supported in libstdc++
1251 case "$target_thread_file" in
1253 THREADH=threads-no.h
1256 THREADH=threads-posix.h
1258 decosf1 | irix | mach | os2 | solaris | win32 | dce | vxworks)
1259 AC_MSG_ERROR(thread package $THREADS not yet supported)
1262 AC_MSG_ERROR($THREADS is an unsupported/unknown thread package)
1265 AC_MSG_RESULT($THREADH)
1267 AC_LINK_FILES(config/$THREADH, include/bits/c++threads.h)
1268 if test $THREADH != threads-no.h; then
1269 AC_DEFINE(_GLIBCPP_USE_THREADS)
1275 dnl Check for exception handling support. If an explicit enable/disable
1276 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1277 dnl target may or may not support call frame exceptions.
1279 dnl GLIBCPP_ENABLE_SJLJ_EXCEPTIONS
1280 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1281 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1283 dnl Define _GLIBCPP_SJLJ_EXCEPTIONS if the compiler is configured for it.
1285 AC_DEFUN(GLIBCPP_ENABLE_SJLJ_EXCEPTIONS, [
1286 AC_MSG_CHECKING([for exception model to use])
1289 AC_ARG_ENABLE(sjlj-exceptions,
1290 [ --enable-sjlj-exceptions force use of builtin_setjmp for exceptions],
1292 [dnl Botheration. Now we've got to detect the exception model.
1293 dnl Link tests against libgcc.a are problematic since -- at least
1294 dnl as of this writing -- we've not been given proper -L bits for
1295 dnl single-tree newlib and libgloss.
1297 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
1298 dnl conftest files before we got a change to grep them first.
1299 cat > conftest.$ac_ext << EOF
1300 [#]line __oline__ "configure"
1309 old_CXXFLAGS="$CXXFLAGS"
1311 if AC_TRY_EVAL(ac_compile); then
1312 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1313 enable_sjlj_exceptions=yes
1314 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1315 enable_sjlj_exceptions=no
1318 CXXFLAGS="$old_CXXFLAGS"
1320 if test x$enable_sjlj_exceptions = xyes; then
1321 AC_DEFINE(_GLIBCPP_SJLJ_EXCEPTIONS, 1,
1322 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1323 ac_exception_model_name=sjlj
1324 elif test x$enable_sjlj_exceptions = xno; then
1325 ac_exception_model_name="call frame"
1327 AC_MSG_ERROR([unable to detect exception model])
1330 AC_MSG_RESULT($ac_exception_model_name)
1335 dnl Check for template specializations for the 'long long' type extension.
1337 dnl GLIBCPP_ENABLE_LONG_LONG
1338 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1339 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1340 dnl + Usage: GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1341 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1342 dnl defaults to `no'.
1343 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1345 dnl GLIBCPP_ENABLE_LONG_LONG
1346 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1347 define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1349 AC_ARG_ENABLE(long-long,
1350 changequote(<<, >>)dnl
1351 <<--enable-long-long turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1352 changequote([, ])dnl
1353 [case "$enableval" in
1354 yes) enable_long_long=yes ;;
1355 no) enable_long_long=no ;;
1356 *) AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1358 enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1360 # Allow use of os-dependent settings, so that macros that turn on
1361 # C99 capabilities can be defined and used in a consistent way.
1362 OS_INC_PATH=${srcdir}/$os_include_dir
1363 ac_test_CFLAGS="${CFLAGS+set}"
1364 ac_save_CFLAGS="$CFLAGS"
1365 CFLAGS="-I$OS_INC_PATH"
1367 # Check for the existence of functions used if long long is enabled.
1368 AC_CHECK_FUNC(strtoll,,ac_strtoll=no)
1369 AC_CHECK_FUNC(strtoull,,ac_strtoull=no)
1371 # Check for lldiv_t, et. al.
1372 AC_MSG_CHECKING([for lldiv_t declaration])
1373 AC_CACHE_VAL(glibcpp_lldiv_t_use, [
1374 AC_TRY_COMPILE([#include <bits/os_defines.h>
1375 #include <stdlib.h>],
1377 [glibcpp_lldiv_t_use=yes], [glibcpp_lldiv_t_use=no])
1379 AC_MSG_RESULT($glibcpp_lldiv_t_use)
1380 if test x$glibcpp_lldiv_t_use = x"yes"; then
1381 AC_DEFINE(HAVE_LLDIV_T)
1384 AC_MSG_CHECKING([for enabled long long])
1385 if test x"$ac_strtoll" = xno || test x"$ac_strtoull" = xno; then
1386 enable_long_long=no;
1388 AC_MSG_RESULT($enable_long_long)
1390 # Option parsed, now set things appropriately
1391 if test x"$enable_long_long" = xyes; then
1392 AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1396 CFLAGS="$ac_save_CFLAGS"
1401 dnl Check for what kind of C headers to use.
1403 dnl GLIBCPP_ENABLE_CHEADERS
1404 dnl --enable-cheaders= [does stuff].
1405 dnl --disable-cheaders [does not do anything, really].
1406 dnl + This will eventually need to be 'c_shadow' by default.
1407 dnl + Usage: GLIBCPP_ENABLE_CHEADERS[(DEFAULT)]
1408 dnl Where DEFAULT is either `c' or `c_std' or 'c_shadow'.
1409 dnl If ommitted, it defaults to `c_std'.
1410 AC_DEFUN(GLIBCPP_ENABLE_CHEADERS, [dnl
1411 define([GLIBCPP_ENABLE_CHEADERS_DEFAULT], ifelse($1, c_std, c_std, c_std))dnl
1412 AC_MSG_CHECKING([for c header strategy to use])
1413 AC_ARG_ENABLE(cheaders,
1414 changequote(<<, >>)dnl
1415 << --enable-cheaders construct "C" header files for
1416 g++ [default=>>GLIBCPP_ENABLE_CHEADERS_DEFAULT],
1418 [case "$enableval" in
1423 enable_cheaders=c_std
1426 enable_cheaders=c_shadow
1428 *) AC_MSG_ERROR([Unknown argument to enable/disable "C" headers])
1431 enable_cheaders=GLIBCPP_ENABLE_CHEADERS_DEFAULT)
1432 AC_MSG_RESULT($enable_cheaders)
1434 dnl Option parsed, now set things appropriately
1435 case "$enable_cheaders" in
1437 CSHADOW_FLAGS="-fno-builtin"
1438 C_INCLUDE_DIR='${top_srcdir}/include/c_shadow'
1439 AC_DEFINE(_GLIBCPP_USE_SHADOW_HEADERS)
1443 C_INCLUDE_DIR='${top_srcdir}/include/c_std'
1447 C_INCLUDE_DIR='${top_srcdir}/include/c'
1451 AC_SUBST(CSHADOW_FLAGS)
1452 AC_SUBST(C_INCLUDE_DIR)
1453 AM_CONDITIONAL(GLIBCPP_USE_CSHADOW, test "$enable_cheaders" = c_shadow)
1458 dnl Check for wide character support. Has the same effect as the option
1459 dnl in gcc's configure, but in a form that autoconf can mess with.
1461 dnl GLIBCPP_ENABLE_C_MBCHAR
1462 dnl --enable-c-mbchar requests all the wchar_t stuff.
1463 dnl --disable-c-mbchar doesn't.
1464 dnl + Usage: GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1465 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1466 dnl defaults to `no'.
1467 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1468 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1469 AC_ARG_ENABLE(c-mbchar,
1470 changequote(<<, >>)dnl
1471 << --enable-c-mbchar enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1472 changequote([, ])dnl
1473 [case "$enableval" in
1474 yes) enable_c_mbchar=yes ;;
1475 no) enable_c_mbchar=no ;;
1476 *) AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1478 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1479 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1484 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1486 dnl GLIBCPP_INCLUDE_DIR
1488 dnl TOPLEVEL_INCLUDES
1489 dnl LIBMATH_INCLUDES
1490 dnl LIBSUPCXX_INCLUDES
1492 dnl CSHADOW_INCLUDES
1494 dnl GLIBCPP_EXPORT_INCLUDE
1495 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1496 # Root level of the include sources.
1497 GLIBCPP_INCLUDE_DIR='$(top_srcdir)/include'
1499 # Can either use include/c or include/c_std to grab "C" headers. This
1500 # variable is set to the include directory currently in use.
1501 # set with C_INCLUDE_DIR in GLIBCPP_ENABLE_CHEADERS
1503 # Passed down for canadian crosses.
1504 if test x"$CANADIAN" = xyes; then
1505 TOPLEVEL_INCLUDES='-I$(includedir)'
1508 LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1510 LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1512 #if GLIBCPP_NEED_LIBIO
1513 LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1515 #LIBIO_INCLUDES='-I$(top_srcdir)/libio'
1518 #if GLIBCPP_USE_CSHADOW
1519 # CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR) \
1520 # -I$(top_blddir)/cshadow'
1522 CSTD_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR)'
1525 # Now, export this to all the little Makefiles....
1526 AC_SUBST(GLIBCPP_INCLUDE_DIR)
1527 AC_SUBST(TOPLEVEL_INCLUDES)
1528 AC_SUBST(LIBMATH_INCLUDES)
1529 AC_SUBST(LIBSUPCXX_INCLUDES)
1530 AC_SUBST(LIBIO_INCLUDES)
1531 AC_SUBST(CSTD_INCLUDES)
1536 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1538 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1539 # Optimization flags that are probably a good idea for thrill-seekers. Just
1540 # uncomment the lines below and make, everything else is ready to go...
1541 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1543 AC_SUBST(OPTIMIZE_CXXFLAGS)
1545 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings -Winline'
1546 AC_SUBST(WARN_FLAGS)
1550 dnl GLIBCPP_EXPORT_INSTALL_INFO
1551 dnl calculates gxx_install_dir
1552 dnl exports glibcpp_toolexecdir
1553 dnl exports glibcpp_toolexeclibdir
1555 dnl Assumes cross_compiling bits already done, and with_cross_host in
1558 dnl GLIBCPP_EXPORT_INSTALL_INFO
1559 AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [
1561 glibcpp_toolexecdir=no
1562 glibcpp_toolexeclibdir=no
1564 AC_MSG_CHECKING([for interface version number])
1565 libstdcxx_interface=$INTERFACE
1566 AC_MSG_RESULT($libstdcxx_interface)
1568 # Process the option --with-gxx-include-dir=<path to include-files directory>
1569 AC_MSG_CHECKING([for --with-gxx-include-dir])
1570 AC_ARG_WITH(gxx-include-dir,
1571 [ --with-gxx-include-dir the installation directory for include files],
1572 [case "${withval}" in
1574 AC_MSG_ERROR(Missing directory for --with-gxx-include-dir)
1581 gxx_include_dir=${withval}
1583 esac], [gxx_include_dir=no])
1584 AC_MSG_RESULT($gxx_include_dir)
1586 # Process the option "--enable-version-specific-runtime-libs"
1587 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
1588 AC_ARG_ENABLE(version-specific-runtime-libs,
1589 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
1590 [ version_specific_libs=yes
1591 # Need the gcc compiler version to know where to install libraries
1592 # and header files if --enable-version-specific-runtime-libs option
1595 gcc_version_trigger=${srcdir}/../gcc/version.c
1596 gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([^\"]*\)\".*/\1/'`
1597 gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
1598 gxx_include_dir='$(libdir)/gcc-lib/$(target_alias)/'${gcc_version}/include/g++
1599 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1600 glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}
1602 ],version_specific_libs=no)
1603 AC_MSG_RESULT($version_specific_libs)
1605 # Default case for install directory for include files.
1606 if test x"$version_specific_libs" = x"no" \
1607 && test x"$gxx_include_dir" = x"no"; then
1608 gxx_include_dir='$(prefix)'/include/g++-${libstdcxx_interface}
1611 # Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir
1612 # Install a library built with a cross compiler in tooldir, not libdir.
1613 if test x"$glibcpp_toolexecdir" = x"no"; then
1614 if test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
1615 glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)'
1616 glibcpp_toolexeclibdir='$(toolexecdir)/lib$(MULTISUBDIR)'
1618 glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
1619 glibcpp_toolexeclibdir='$(libdir)$(MULTISUBDIR)'
1623 AC_MSG_CHECKING([for install location])
1624 AC_MSG_RESULT($gxx_include_dir)
1626 AC_SUBST(gxx_include_dir)
1627 AC_SUBST(glibcpp_toolexecdir)
1628 AC_SUBST(glibcpp_toolexeclibdir)
1632 # Check whether LC_MESSAGES is available in <locale.h>.
1633 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1635 # This file file be copied and used freely without restrictions. It can
1636 # be used in projects which are not available under the GNU Public License
1637 # but which still want to provide support for the GNU gettext functionality.
1638 # Please note that the actual code is *not* freely available.
1642 AC_DEFUN(AC_LC_MESSAGES, [
1643 AC_CHECK_HEADER(locale.h, [
1644 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1645 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1646 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1647 if test $ac_cv_val_LC_MESSAGES = yes; then
1648 AC_DEFINE(HAVE_LC_MESSAGES)
1654 # Check for functions in math library.
1655 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1657 # This file can be copied and used freely without restrictions. It can
1658 # be used in projects which are not available under the GNU Public License
1659 # but which still want to provide support for the GNU gettext functionality.
1660 # Please note that the actual code is *not* freely available.
1664 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1665 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1666 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])
1667 AC_SUBST(LIBMATHOBJS)dnl
1671 # Check for string functions.
1672 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1674 # This file can be copied and used freely without restrictions. It can
1675 # be used in projects which are not available under the GNU Public License
1676 # but which still want to provide support for the GNU gettext functionality.
1677 # Please note that the actual code is *not* freely available.
1681 dnl AC_REPLACE_STRINGFUNCS(FUNCTION...)
1682 AC_DEFUN(AC_REPLACE_STRINGFUNCS,
1683 [AC_CHECK_FUNCS([$1], , [LIBSTRINGOBJS="$LIBSTRINGOBJS ${ac_func}.lo"])
1684 AC_SUBST(LIBSTRINGOBJS)dnl
1688 dnl This macro searches for a GNU version of make. If a match is found, the
1689 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1690 dnl set to "#". This is useful for including a special features in a Makefile,
1691 dnl which cannot be handled by other versions of make. The variable
1692 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1693 dnl the empty string otherwise.
1695 dnl Here is an example of its use:
1697 dnl Makefile.in might contain:
1699 dnl # A failsafe way of putting a dependency rule into a makefile
1701 dnl $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1703 dnl @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1704 dnl @ifGNUmake@ include $(DEPEND)
1705 dnl @ifGNUmake@ endif
1707 dnl Then configure.in would normally contain:
1709 dnl CHECK_GNU_MAKE()
1710 dnl AC_OUTPUT(Makefile)
1712 dnl Then perhaps to cause gnu make to override any other make, we could do
1713 dnl something like this (note that GNU make always looks for GNUmakefile first):
1715 dnl if ! test x$_cv_gnu_make_command = x ; then
1716 dnl mv Makefile GNUmakefile
1717 dnl echo .DEFAULT: > Makefile ;
1718 dnl echo \ $_cv_gnu_make_command \$@ >> Makefile;
1721 dnl Then, if any (well almost any) other make is called, and GNU make also
1722 dnl exists, then the other make wraps the GNU make.
1724 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1725 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1727 dnl #### Changes for libstdc++-v3: reformatting and linewrapping; prepending
1728 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1729 dnl #### conditional's subshell (" --version" is not a command), using a
1730 dnl #### different option to grep(1).
1732 dnl #### Fixed Bourne shell portability bug (use ${MAKE-make}, not
1733 dnl #### ${MAKE:-make}).
1736 GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
1737 _cv_gnu_make_command='' ;
1738 dnl Search all the common names for GNU make
1739 for a in "${MAKE-make}" make gmake gnumake ; do
1740 if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
1742 _cv_gnu_make_command=$a ;
1747 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
1748 dnl string, '#' otherwise
1749 if test "x$_cv_gnu_make_command" != "x" ; then
1757 sinclude(../libtool.m4)
1758 dnl The lines below arrange for aclocal not to bring an installed
1759 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1760 dnl add a definition of LIBTOOL to Makefile.in.
1761 ifelse(,,,[AC_SUBST(LIBTOOL)
1762 AC_DEFUN([AM_PROG_LIBTOOL])
1763 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1764 AC_DEFUN([AC_PROG_LD])
1768 # Do all the work for Automake. This macro actually does too much --
1769 # some checks are only needed if your package does certain things.
1770 # But this isn't really a big deal.
1775 dnl AM_INIT_AUTOMAKE(package,version, [no-define])
1777 AC_DEFUN(AM_INIT_AUTOMAKE,
1778 [AC_REQUIRE([AC_PROG_INSTALL])
1783 dnl test to see if srcdir already configured
1784 if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
1785 AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
1788 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of package])
1789 AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version number of package]))
1790 AC_REQUIRE([AM_SANITY_CHECK])
1791 AC_REQUIRE([AC_ARG_PROGRAM])
1792 dnl FIXME This is truly gross.
1793 missing_dir=`cd $ac_aux_dir && pwd`
1794 AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
1795 AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
1796 AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
1797 AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
1798 AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
1799 AC_REQUIRE([AC_PROG_MAKE_SET])])
1802 # Check to make sure that the build environment is sane.
1805 AC_DEFUN(AM_SANITY_CHECK,
1806 [AC_MSG_CHECKING([whether build environment is sane])
1809 echo timestamp > conftestfile
1810 # Do `set' in a subshell so we don't clobber the current shell's
1811 # arguments. Must try -L first in case configure is actually a
1812 # symlink; some systems play weird games with the mod time of symlinks
1813 # (eg FreeBSD returns the mod time of the symlink's containing
1816 set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
1817 if test "[$]*" = "X"; then
1819 set X `ls -t $srcdir/configure conftestfile`
1821 if test "[$]*" != "X $srcdir/configure conftestfile" \
1822 && test "[$]*" != "X conftestfile $srcdir/configure"; then
1824 # If neither matched, then we have a broken ls. This can happen
1825 # if, for instance, CONFIG_SHELL is bash and it inherits a
1826 # broken ls alias from the environment. This has actually
1827 # happened. Such a system could not be considered "sane".
1828 AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken
1829 alias in your environment])
1832 test "[$]2" = conftestfile
1838 AC_MSG_ERROR([newly created file is older than distributed files!
1839 Check your system clock])
1842 AC_MSG_RESULT(yes)])
1844 dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
1845 dnl The program must properly implement --version.
1846 AC_DEFUN(AM_MISSING_PROG,
1847 [AC_MSG_CHECKING(for working $2)
1848 # Run test in a subshell; some versions of sh will print an error if
1849 # an executable is not found, even if stderr is redirected.
1850 # Redirect stdin to placate older versions of autoconf. Sigh.
1851 if ($2 --version) < /dev/null > /dev/null 2>&1; then
1853 AC_MSG_RESULT(found)
1856 AC_MSG_RESULT(missing)
1860 # Add --enable-maintainer-mode option to configure.
1865 AC_DEFUN(AM_MAINTAINER_MODE,
1866 [AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
1867 dnl maintainer-mode is disabled by default
1868 AC_ARG_ENABLE(maintainer-mode,
1869 [ --enable-maintainer-mode enable make rules and dependencies not useful
1870 (and sometimes confusing) to the casual installer],
1871 USE_MAINTAINER_MODE=$enableval,
1872 USE_MAINTAINER_MODE=no)
1873 AC_MSG_RESULT($USE_MAINTAINER_MODE)
1874 AM_CONDITIONAL(MAINTAINER_MODE, test $USE_MAINTAINER_MODE = yes)
1875 MAINT=$MAINTAINER_MODE_TRUE
1880 # Define a conditional.
1882 AC_DEFUN(AM_CONDITIONAL,
1893 # Like AC_CONFIG_HEADER, but automatically create stamp file.
1895 AC_DEFUN(AM_CONFIG_HEADER,
1897 AC_CONFIG_HEADER([$1])
1898 dnl When config.status generates a header, we must update the stamp-h file.
1899 dnl This file resides in the same directory as the config header
1900 dnl that is generated. We must strip everything past the first ":",
1901 dnl and everything past the last "/".
1902 AC_OUTPUT_COMMANDS(changequote(<<,>>)dnl
1903 ifelse(patsubst(<<$1>>, <<[^ ]>>, <<>>), <<>>,
1904 <<test -z "<<$>>CONFIG_HEADERS" || echo timestamp > patsubst(<<$1>>, <<^\([^:]*/\)?.*>>, <<\1>>)stamp-h<<>>dnl>>,
1906 for am_file in <<$1>>; do
1907 case " <<$>>CONFIG_HEADERS " in
1908 *" <<$>>am_file "*<<)>>
1909 echo timestamp > `echo <<$>>am_file | sed -e 's%:.*%%' -e 's%[^/]*$%%'`stamp-h$am_indx
1912 am_indx=`expr "<<$>>am_indx" + 1`