2 dnl Initialize configure bits.
4 dnl Define OPTLEVEL='-O2' if new inlining code present.
7 AC_DEFUN(GLIBCPP_CONFIGURE, [
8 dnl Default to --enable-multilib
9 AC_ARG_ENABLE(multilib,
10 [ --enable-multilib build hella library versions (default)],
11 [case "${enableval}" in
14 *) AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
15 esac], [multilib=yes])dnl
17 dnl We may get other options which we dont document:
18 dnl --with-target-subdir, --with-multisrctop, --with-multisubdir
19 if test "[$]{srcdir}" = "."; then
20 if test "[$]{with_target_subdir}" != "."; then
21 glibcpp_basedir="[$]{srcdir}/[$]{with_multisrctop}../$1"
23 glibcpp_basedir="[$]{srcdir}/[$]{with_multisrctop}$1"
26 glibcpp_basedir="[$]{srcdir}/$1"
28 AC_SUBST(glibcpp_basedir)
30 AM_INIT_AUTOMAKE(libstdc++, 2.90.8)
32 # Never versions of autoconf add an underscore to these functions.
33 # Prevent future problems ...
34 ifdef([AC_PROG_CC_G],[],[define([AC_PROG_CC_G],defn([_AC_PROG_CC_G]))])
35 ifdef([AC_PROG_CC_GNU],[],[define([AC_PROG_CC_GNU],defn([_AC_PROG_CC_GNU]))])
36 ifdef([AC_PROG_CXX_G],[],[define([AC_PROG_CXX_G],defn([_AC_PROG_CXX_G]))])
37 ifdef([AC_PROG_CXX_GNU],[],[define([AC_PROG_CXX_GNU],defn([_AC_PROG_CXX_GNU]))])
41 # FIXME: We temporarily define our own version of AC_PROG_CC. This is
42 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS. We
43 # are probably using a cross compiler, which will not be able to fully
44 # link an executable. This should really be fixed in autoconf
47 AC_DEFUN(LIB_AC_PROG_CC,
48 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
49 dnl Fool anybody using AC_PROG_CC.
50 AC_PROVIDE([AC_PROG_CC])
51 AC_CHECK_PROG(CC, gcc, gcc)
52 if test -z "$CC"; then
53 AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
54 test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
59 if test $ac_cv_prog_gcc = yes; then
61 dnl Check whether -g works, even if CFLAGS is set, in case the package
62 dnl plays around with CFLAGS (such as to build both debugging and
63 dnl normal versions of a library), tasteless as that idea is.
64 ac_test_CFLAGS="${CFLAGS+set}"
65 ac_save_CFLAGS="$CFLAGS"
68 if test "$ac_test_CFLAGS" = set; then
69 CFLAGS="$ac_save_CFLAGS"
70 elif test $ac_cv_prog_cc_g = yes; then
77 test "${CFLAGS+set}" = set || CFLAGS="-g"
83 # Can't just call these here as g++ requires libstc++ to be built....
86 # Likewise for AC_PROG_CXX.
87 AC_DEFUN(LIB_AC_PROG_CXX,
88 [AC_BEFORE([$0], [AC_PROG_CXXCPP])dnl
89 dnl Fool anybody using AC_PROG_CXX.
90 AC_PROVIDE([AC_PROG_CXX])
91 # Use CXX_libstdcxx so that we do not cause CXX to be cached with the
92 # flags that come in CXX while configuring libstdc++. They're different
93 # from those used for all other target libraries. If CXX is set in
94 # the environment, respect that here.
96 AC_CHECK_PROGS(CXX_libstdcxx, $CCC c++ g++ gcc CC cxx cc++, gcc)
99 test -z "$CXX" && AC_MSG_ERROR([no acceptable c++ found in \$PATH])
103 if test $ac_cv_prog_gxx = yes; then
105 dnl Check whether -g works, even if CXXFLAGS is set, in case the package
106 dnl plays around with CXXFLAGS (such as to build both debugging and
107 dnl normal versions of a library), tasteless as that idea is.
108 ac_test_CXXFLAGS="${CXXFLAGS+set}"
109 ac_save_CXXFLAGS="$CXXFLAGS"
112 if test "$ac_test_CXXFLAGS" = set; then
113 CXXFLAGS="$ac_save_CXXFLAGS"
114 elif test $ac_cv_prog_cxx_g = yes; then
121 test "${CXXFLAGS+set}" = set || CXXFLAGS="-g"
127 AC_CHECK_TOOL(AS, as)
128 AC_CHECK_TOOL(AR, ar)
129 AC_CHECK_TOOL(RANLIB, ranlib, :)
135 # We need AC_EXEEXT to keep automake happy in cygnus mode. However,
136 # at least currently, we never actually build a program, so we never
137 # need to use $(EXEEXT). Moreover, the test for EXEEXT normally
138 # fails, because we are probably configuring with a cross compiler
139 # which cant create executables. So we include AC_EXEEXT to keep
140 # automake happy, but we dont execute it, since we dont care about
146 # configure.host sets the following important variables
147 # glibcpp_cflags - host specific C compiler flags
148 # glibcpp_cxxflags - host specific C++ compiler flags
152 . [$]{glibcpp_basedir}/configure.host
154 case [$]{glibcpp_basedir} in
155 /* | [A-Za-z]:[/\\]*) libgcj_flagbasedir=[$]{glibcpp_basedir} ;;
156 *) glibcpp_flagbasedir='[$](top_builddir)/'[$]{glibcpp_basedir} ;;
159 # This does for the target what configure.host does for the host. In
160 # addition to modifying the same flags, it also sets up symlinks.
163 GLIBCPP_CFLAGS="[$]{glibcpp_cflags}"
164 GLIBCPP_CXXFLAGS="[$]{glibcpp_cxxflags}"
165 AC_SUBST(GLIBCPP_CFLAGS)
166 AC_SUBST(GLIBCPP_CXXFLAGS)
171 dnl Check to see if g++ can compile this library, and if so, if any version-
172 dnl specific precautions need to be taken.
174 dnl GLIBCPP_CHECK_COMPILER_VERSION
175 AC_DEFUN(GLIBCPP_CHECK_COMPILER_VERSION, [
176 # Sanity check that g++ is capable of dealing with v-3.
177 AC_MSG_CHECKING([for g++ that will successfully compile this code])
179 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
182 ], gpp_satisfactory=yes, AC_MSG_ERROR([please upgrade to gcc-2.95 or above]))
183 AC_MSG_RESULT($gpp_satisfactory)
188 dnl Test for newer compiler features, or features that are present in newer
189 dnl compiler version but not older compiler versions should be placed
192 dnl Define WFMT_FLAGS='-fdiagnostics-show-location=once' if possible
194 dnl Define WERROR='-Werror' if requested and possible; g++'s that lack the
195 dnl new inlining code or the new system_header pragma will die on -Werror.
196 dnl Leave it out by default and use maint-mode to use it.
198 dnl Define SECTION_FLAGS='-ffunction-sections -fdata-sections' if
199 dnl compiler supports it.
200 dnl GLIBCPP_CHECK_COMPILER_FEATURES
201 AC_DEFUN(GLIBCPP_CHECK_COMPILER_FEATURES, [
202 # All these tests are for C++; save the language and the compiler flags.
203 # The CXXFLAGS thing is suspicious, but based on similar bits
204 # found in GLIBCPP_CONFIGURE.
207 ac_test_CXXFLAGS="${CXXFLAGS+set}"
208 ac_save_CXXFLAGS="$CXXFLAGS"
210 # Check for maintainer-mode bits.
211 if test x"$USE_MAINTAINER_MODE" = xno; then
217 # Check for more sophisticated diagnostic control.
218 AC_MSG_CHECKING([for g++ that supports -fdiagnostics-show-location=once])
219 CXXFLAGS='-Werror -fdiagnostics-show-location=once'
220 AC_TRY_COMPILE(, [int foo;
221 ], [ac_gabydiags=yes], [ac_gabydiags=no])
222 if test "$ac_test_CXXFLAGS" = set; then
223 CXXFLAGS="$ac_save_CXXFLAGS"
225 # this is the suspicious part
228 if test "$ac_gabydiags" = "yes"; then
229 WFMT_FLAGS='-fdiagnostics-show-location=once'
231 AC_MSG_RESULT($ac_gabydiags)
233 # Check for -ffunction-sections -fdata-sections
234 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
235 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
236 AC_TRY_COMPILE(, [int foo;
237 ], [ac_fdsections=yes], [ac_fdsections=no])
238 if test "$ac_test_CXXFLAGS" = set; then
239 CXXFLAGS="$ac_save_CXXFLAGS"
241 # this is the suspicious part
244 if test "$ac_fdsections" = "yes"; then
245 SECTION_FLAGS='-ffunction-sections -fdata-sections'
247 AC_MSG_RESULT($ac_fdsections)
252 AC_SUBST(SECTION_FLAGS)
257 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
258 dnl the native linker is in use, all variables will be defined to something
259 dnl safe (like an empty string).
261 dnl Define SECTION_LDFLAGS='-Wl,--gc-sections' if possible.
262 dnl Define OPT_LDFLAGS='-Wl,-O1' if possible.
264 dnl GLIBCPP_CHECK_LINKER_FEATURES
265 AC_DEFUN(GLIBCPP_CHECK_LINKER_FEATURES, [
266 # If we're not using GNU ld, then there's no point in even trying these
267 # tests. Check for that first. We should have already tested for gld
268 # by now (in libtool), but require it now just to be safe...
271 AC_REQUIRE([AC_PROG_LD])
274 if test "$ac_cv_prog_gnu_ld" = "broken"; then
275 # GNU ld it is! Joy and bunny rabbits!
277 # All these tests are for C++; save the language and the compiler flags.
278 # Need to do this so that g++ won't try to link in libstdc++
279 ac_test_CFLAGS="${CFLAGS+set}"
280 ac_save_CFLAGS="$CFLAGS"
281 CFLAGS='-x c++ -Wl,--gc-sections'
283 # Check for -Wl,--gc-sections
284 # XXX This test is broken at the moment, as symbols required for
285 # linking are now in libsupc++ (not built yet.....). In addition,
286 # this test has cored on solaris in the past. In addition,
287 # --gc-sections doesn't really work at the moment (keeps on discarding
288 # used sections, first .eh_frame and now some of the glibc sections for
289 # iconv). Bzzzzt. Thanks for playing, maybe next time.
290 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
298 ], [ac_sectionLDflags=yes],[ac_sectionLFflags=no], [ac_sectionLDflags=yes])
299 if test "$ac_test_CFLAGS" = set; then
300 CFLAGS="$ac_save_CFLAGS"
302 # this is the suspicious part
305 if test "$ac_sectionLDflags" = "yes"; then
306 SECTION_LDFLAGS='-Wl,--gc-sections'
308 AC_MSG_RESULT($ac_sectionLDflags)
311 # Set linker optimization flags.
312 if test "$ac_cv_prog_gnu_ld" = "yes"; then
313 OPT_LDFLAGS='-Wl,-O1'
316 AC_SUBST(SECTION_LDFLAGS)
317 AC_SUBST(OPT_LDFLAGS)
322 dnl Check to see if the (math function) argument passed is
323 dnl 1) declared when using the c++ compiler
324 dnl 2) has "C" linkage
326 dnl Define HAVE_CARGF etc if "cargf" is declared and links
328 dnl argument 1 is name of function to check
330 dnl ASSUMES argument is a math function with ONE parameter
332 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1
333 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1, [
334 AC_MSG_CHECKING([for $1 declaration])
335 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
338 AC_TRY_COMPILE([#include <math.h>],
340 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
343 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
344 if test x$glibcpp_cv_func_$1_use = x"yes"; then
351 dnl Check to see if the (math function) argument passed is
352 dnl 1) declared when using the c++ compiler
353 dnl 2) has "C" linkage
355 dnl Define HAVE_CARGF etc if "cargf" is declared and links
357 dnl argument 1 is name of function to check
359 dnl ASSUMES argument is a math function with TWO parameters
361 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2
362 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2, [
363 AC_MSG_CHECKING([for $1 declaration])
364 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
367 AC_TRY_COMPILE([#include <math.h>],
369 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
372 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
373 if test x$glibcpp_cv_func_$1_use = x"yes"; then
380 dnl Check to see if the (math function) argument passed is
381 dnl 1) declared when using the c++ compiler
382 dnl 2) has "C" linkage
384 dnl Define HAVE_CARGF etc if "cargf" is declared and links
386 dnl argument 1 is name of function to check
388 dnl ASSUMES argument is a math function with THREE parameters
390 dnl GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3
391 AC_DEFUN(GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3, [
392 AC_MSG_CHECKING([for $1 declaration])
393 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
396 AC_TRY_COMPILE([#include <math.h>],
398 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
401 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
402 if test x$glibcpp_cv_func_$1_use = x"yes"; then
409 dnl Check to see if the (stdlib function) argument passed is
410 dnl 1) declared when using the c++ compiler
411 dnl 2) has "C" linkage
413 dnl Define HAVE_STRTOLD if "strtold" is declared and links
414 dnl Define HAVE_STRTOF if "strtof" is declared and links
416 dnl argument 1 is name of function to check
418 dnl ASSUMES argument is a math function with TWO parameters
420 dnl GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2
421 AC_DEFUN(GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
422 AC_MSG_CHECKING([for $1 declaration])
423 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
426 AC_TRY_COMPILE([#include <stdlib.h>],
428 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
431 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
432 if test x$glibcpp_cv_func_$1_use = x"yes"; then
439 dnl Because the builtins are picky picky picky about the arguments they take,
440 dnl do an explict linkage tests here.
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 ONE parameter
451 dnl GLIBCPP_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
452 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
453 AC_MSG_CHECKING([for $1 declaration])
454 AC_CACHE_VAL(glibcpp_cv_func_$1_use, [
457 AC_TRY_COMPILE([#include <math.h>],
459 [glibcpp_cv_func_$1_use=yes], [glibcpp_cv_func_$1_use=no])
462 AC_MSG_RESULT($glibcpp_cv_func_$1_use)
463 if test x$glibcpp_cv_func_$1_use = x"yes"; then
464 AC_MSG_CHECKING([for $1 linkage])
465 AC_CACHE_VAL(glibcpp_cv_func_$1_link, [
466 AC_TRY_LINK([#include <math.h>],
468 [glibcpp_cv_func_$1_link=yes], [glibcpp_cv_func_$1_link=no])
470 AC_MSG_RESULT($glibcpp_cv_func_$1_link)
471 if test x$glibcpp_cv_func_$1_link = x"yes"; then
472 ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
473 AC_DEFINE_UNQUOTED(${ac_tr_func})
480 dnl Check to see what builtin math functions are supported
482 dnl check for __builtin_abs
483 dnl check for __builtin_fabsf
484 dnl check for __builtin_fabs
485 dnl check for __builtin_fabl
486 dnl check for __builtin_labs
487 dnl check for __builtin_sqrtf
488 dnl check for __builtin_sqrtl
489 dnl check for __builtin_fsqrt
490 dnl check for __builtin_sinf
491 dnl check for __builtin_sin
492 dnl check for __builtin_sinl
493 dnl check for __builtin_cosf
494 dnl check for __builtin_cos
495 dnl check for __builtin_cosl
497 dnl GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT
498 AC_DEFUN(GLIBCPP_CHECK_BUILTIN_MATH_SUPPORT, [
499 dnl Test for builtin math functions.
500 dnl These are made in gcc/c-common.c
501 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
502 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
503 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
504 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
505 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
507 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
508 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fsqrt)
509 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
511 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
512 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
513 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
515 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
516 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
517 GLIBCPP_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
519 dnl There is, without a doubt, a more elegant way to have these
520 dnl names exported so that they won't be stripped out of acconfig.h by
521 dnl autoheader. I leave this as an exercise to somebody less frustrated
522 dnl than I.... please email the libstdc++ list if you can figure out a
523 dnl more elegant approach (see autoconf/acgen.m4 and specifically
524 dnl AC_CHECK_FUNC for things to steal.)
526 if test x$dummyvar = x"yes"; then
527 AC_DEFINE(HAVE___BUILTIN_ABS)
528 AC_DEFINE(HAVE___BUILTIN_LABS)
529 AC_DEFINE(HAVE___BUILTIN_COS)
530 AC_DEFINE(HAVE___BUILTIN_COSF)
531 AC_DEFINE(HAVE___BUILTIN_COSL)
532 AC_DEFINE(HAVE___BUILTIN_FABS)
533 AC_DEFINE(HAVE___BUILTIN_FABSF)
534 AC_DEFINE(HAVE___BUILTIN_FABSL)
535 AC_DEFINE(HAVE___BUILTIN_SIN)
536 AC_DEFINE(HAVE___BUILTIN_SINF)
537 AC_DEFINE(HAVE___BUILTIN_SINL)
538 AC_DEFINE(HAVE___BUILTIN_FSQRT)
539 AC_DEFINE(HAVE___BUILTIN_SQRTF)
540 AC_DEFINE(HAVE___BUILTIN_SQRTL)
546 dnl Check to see what the underlying c library
547 dnl These checks need to do two things:
548 dnl 1) make sure the name is declared when using the c++ compiler
549 dnl 2) make sure the name has "C" linkage
550 dnl This might seem like overkill but experience has shown that it's not...
552 dnl Define HAVE_STRTOF etc if "strtof" is found.
553 dnl Define HAVE_STRTOLD etc if "strtold" is found.
555 dnl GLIBCPP_CHECK_STDLIB_SUPPORT
556 AC_DEFUN(GLIBCPP_CHECK_STDLIB_SUPPORT, [
557 ac_test_CXXFLAGS="${CXXFLAGS+set}"
558 ac_save_CXXFLAGS="$CXXFLAGS"
559 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
561 AC_CHECK_FUNCS(strtof)
562 GLIBCPP_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
564 CXXFLAGS="$ac_save_CXXFLAGS"
569 dnl Check to see what the underlying c library or math library is like.
570 dnl These checks need to do two things:
571 dnl 1) make sure the name is declared when using the c++ compiler
572 dnl 2) make sure the name has "C" linkage
573 dnl This might seem like overkill but experience has shown that it's not...
575 dnl Define HAVE_CARGF etc if "cargf" is found.
577 dnl GLIBCPP_CHECK_MATH_SUPPORT
578 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
579 ac_test_CXXFLAGS="${CXXFLAGS+set}"
580 ac_save_CXXFLAGS="$CXXFLAGS"
581 CXXFLAGS='-fno-builtins -D_GNU_SOURCE'
584 AC_CHECK_LIB(m, sin, libm="-lm")
588 dnl Check to see if certain C math functions exist.
589 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
590 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
591 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
592 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
593 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
594 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
595 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
597 dnl Check to see if basic C math functions have float versions.
598 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
599 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
600 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(acosf)
601 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(asinf)
602 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(atanf)
603 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2f)
604 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(ceilf)
605 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(cosf)
606 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(coshf)
607 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expf)
608 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
609 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(floorf)
610 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
611 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
612 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
613 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
614 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
615 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
616 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
617 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sinf)
618 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sinhf)
619 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
620 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(tanf)
621 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(tanhf)
622 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
623 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
625 dnl Check to see if basic C math functions have long double versions.
626 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
627 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
628 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
629 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(acosl)
630 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(asinl)
631 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(atanl)
632 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
633 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(ceill)
634 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(cosl)
635 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(coshl)
636 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
637 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
638 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(floorl)
639 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
640 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
641 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
642 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
643 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
644 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
645 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
646 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sinl)
647 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sinhl)
648 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
649 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(tanl)
650 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(tanhl)
651 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
652 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
654 dnl Some runtimes have these functions with a preceding underscore. Please
655 dnl keep this sync'd with the one above. And if you add any new symbol,
656 dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
657 dnl Check to see if certain C math functions exist.
658 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isinf)
659 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isnan)
660 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_finite)
661 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_copysign)
662 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(_sincos)
663 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_fpclass)
664 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_qfpclass)
666 dnl Check to see if basic C math functions have float versions.
667 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isnanf)
668 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isinff)
669 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_acosf)
670 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_asinf)
671 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_atanf)
672 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_atan2f)
673 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_ceilf)
674 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_cosf)
675 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_coshf)
676 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_expf)
677 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_fabsf)
678 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_floorf)
679 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_fmodf)
680 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_frexpf)
681 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_ldexpf)
682 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_logf)
683 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_log10f)
684 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_modff)
685 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_powf)
686 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sinf)
687 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sinhf)
688 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sqrtf)
689 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_tanf)
690 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_tanhf)
691 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(_sincosf)
692 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_finitef)
694 dnl Check to see if basic C math functions have long double versions.
695 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isnanl)
696 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_isinfl)
697 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_copysignl)
698 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_acosl)
699 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_asinl)
700 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_atanl)
701 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_atan2l)
702 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_ceill)
703 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_cosl)
704 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_coshl)
705 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_expl)
706 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_fabsl)
707 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_floorl)
708 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_fmodl)
709 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_frexpl)
710 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_ldexpl)
711 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_logl)
712 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_log10l)
713 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_modfl)
714 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_2(_powl)
715 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sinl)
716 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sinhl)
717 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_sqrtl)
718 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_tanl)
719 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_tanhl)
720 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_3(_sincosl)
721 GLIBCPP_CHECK_MATH_DECL_AND_LINKAGE_1(_finitel)
724 CXXFLAGS="$ac_save_CXXFLAGS"
729 dnl Check to see if there is native support for complex
731 dnl Don't compile bits in math/* if native support exits.
733 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "atan2l/copysignl" is found.
735 dnl GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT
736 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_SUPPORT, [
737 dnl Check for complex versions of math functions of platform.
738 AC_CHECK_HEADERS([complex.h])
739 AC_CHECK_LIB(m, main)
740 AC_REPLACE_MATHFUNCS(cabs cabsf ccos ccosf ccosh ccoshf cexp cexpf \
741 c_log c_logf clog10 clog10f cpow cpowf csin csinf csinh csinhf csqrt \
742 csqrtf ctan ctanf ctanh ctanhf carg cargf nan hypot hypotf atan2f expf \
745 dnl Compile the long double complex functions only if the function
746 dnl provides the non-complex long double functions that are needed.
747 dnl Currently this includes copysignl and atan2l, which should be
748 dnl cached from the GLIBCPP_CHECK_MATH_SUPPORT macro, above.
749 USE_COMPLEX_LONG_DOUBLE=no
750 if test x$ac_cv_func_atan2l = x"yes" \
751 && test x$ac_cv_func_copysignl = x"yes"; then
752 USE_COMPLEX_LONG_DOUBLE=yes
753 AC_REPLACE_MATHFUNCS(cabsl ccoshl ccosl cexpl cpowl csinhl csinl \
754 csqrtl ctanhl ctanl cargl hypotl signbitl c_logl clog10l)
757 AC_SUBST(USE_COMPLEX_LONG_DOUBLE)
761 dnl Check to see what architecture and operating system we are compiling
762 dnl for. Also, if architecture- or OS-specific flags are required for
763 dnl compilation, pick them up here.
765 dnl GLIBCPP_CHECK_TARGET
766 AC_DEFUN(GLIBCPP_CHECK_TARGET, [
767 . [$]{glibcpp_basedir}/configure.target
768 AC_MSG_RESULT(CPU config directory is $cpu_include_dir)
769 AC_MSG_RESULT(OS config directory is $os_include_dir)
770 AC_LINK_FILES($os_include_dir/bits/os_defines.h, include/bits/os_defines.h)
775 dnl Check to see what the underlying c library's interface to ctype looks
776 dnl like. Bits of locale rely on things like isspace, toupper, etc. This
777 dnl stuff makes sure the right bits from the clibrary get called.
779 dnl Depending on what is found, select various configure/*/bits/ctype_base.h
780 dnl Depending on what is found, select various configure/*/ctype.cc
782 dnl GLIBCPP_CHECK_CTYPE_SUPPORT
783 AC_DEFUN(GLIBCPP_CHECK_CTYPE_SUPPORT, [
784 AC_CHECK_HEADER(ctype.h, [
786 dnl If doesn't match any specified, go with defaults.
789 dnl Test for <ctype> functionality -- GNU/Linux
790 AC_MSG_CHECKING([<ctype> for GNU/Linux])
791 AC_TRY_COMPILE([#include <ctype.h>],
794 { return _ISspace + _ISprint + _IScntrl + _ISupper + _ISlower + _ISalpha \
795 + _ISdigit + _ISpunct + _ISxdigit + _ISalnum + _ISgraph \
796 + __ctype_tolower[a] + __ctype_toupper[a] + __ctype_b[a];}], \
797 ctype_linux=yes, ctype_linux=no)
798 AC_MSG_RESULT($ctype_linux)
799 if test $ctype_linux = "yes"; then
800 ctype_include_dir="config/os/gnu-linux"
804 dnl Test for <ctype> functionality -- FreeBSD 4.0
805 if test $ctype_default = "yes"; then
806 AC_MSG_CHECKING([<ctype> for FreeBSD 4.0])
807 AC_TRY_COMPILE([#include <ctype.h>],
810 { return _CTYPE_S + _CTYPE_R + _CTYPE_C + _CTYPE_U + _CTYPE_L + _CTYPE_A \
811 + _CTYPE_D + _CTYPE_P + _CTYPE_X + _CTYPE_G ;}], \
812 ctype_bsd=yes, ctype_bsd=no)
813 AC_MSG_RESULT($ctype_bsd)
814 if test $ctype_bsd = "yes"; then
815 ctype_include_dir="config/os/bsd"
820 dnl Test for <ctype> functionality -- FreeBSD 3.4
821 if test $ctype_default = "yes"; then
822 AC_MSG_CHECKING([<ctype> for FreeBSD 3.4])
823 AC_TRY_COMPILE([#include <ctype.h>],
826 { return _S + _R + _C + _U + _L + _A \
827 + _D + _P + _X + _G + __istype (a, 0);}], \
828 ctype_freebsd34=yes, ctype_freebsd34=no)
829 AC_MSG_RESULT($ctype_freebsd34)
830 if test $ctype_freebsd34 = "yes"; then
831 ctype_include_dir="config/os/bsd"
836 dnl Test for <ctype> functionality -- Solaris 2.6 and up
837 if test $ctype_default = "yes"; then
838 AC_MSG_CHECKING([<ctype> for Solaris 2.6,7,8])
839 AC_TRY_COMPILE([#include <ctype.h>],
842 { return _ISSPACE + _ISPRINT + _ISCNTRL + _ISUPPER + _ISLOWER + _ISALPHA \
843 + _ISDIGIT + _ISPUNCT + _ISXDIGIT + _ISALNUM + _ISGRAPH \
844 + __trans_lower[a] + __trans_upper[a] + __ctype_mask[a];}], \
845 ctype_solaris=yes, ctype_solaris=no)
846 AC_MSG_RESULT($ctype_solaris)
848 if test $ctype_solaris = "yes"; then
849 AC_MSG_CHECKING([ for version])
851 AC_TRY_COMPILE([#include <ctype.h>],
852 [typedef long* __to_type; __to_type const& _M_toupper = __trans_upper;],\
853 ctype_solaris26=yes, ctype_solaris26=no)
855 if test $ctype_solaris26 = "yes"; then
856 ctype_include_dir="config/os/solaris/solaris2.6"
857 AC_MSG_RESULT([Solaris 2.6])
860 ctype_include_dir="config/os/solaris/solaris2.7"
861 AC_MSG_RESULT([Solaris 7,8])
867 dnl Test for <ctype> functionality -- Solaris 2.5.1
868 if test $ctype_default = "yes"; then
869 AC_MSG_CHECKING([<ctype> for Solaris 2.5.1])
870 AC_TRY_COMPILE([#include <ctype.h>],
873 { return _U + _L + _N + _S + _P + _C + _X + _B \
875 ctype_solaris25=yes, ctype_solaris25=no)
876 AC_MSG_RESULT($ctype_solaris25)
877 if test $ctype_solaris25 = "yes"; then
878 ctype_include_dir="config/os/solaris/solaris2.5"
883 dnl Test for <ctype> functionality -- AIX
884 if test $ctype_default = "yes"; then
885 AC_MSG_CHECKING([<ctype> for AIX])
886 AC_TRY_COMPILE([#include <ctype.h>],
889 { return _ISSPACE + _ISPRINT + _ISCNTRL + _ISUPPER + _ISLOWER + _ISALPHA \
890 + _ISDIGIT + _ISPUNCT + _ISXDIGIT + _ISALNUM + _ISGRAPH \
891 + _VALC('a') + _IS('c', 0);}], \
892 ctype_aix=yes, ctype_aix=no)
893 AC_MSG_RESULT($ctype_aix)
894 if test $ctype_aix = "yes"; then
895 ctype_include_dir="config/os/aix"
900 dnl Test for <ctype> functionality -- IRIX
901 if test $ctype_default = "yes"; then
902 AC_MSG_CHECKING([<ctype> for IRIX])
903 AC_TRY_COMPILE([#include <ctype.h>],
906 { return _U + _L + _N + _S + _P + _C + _B + _X + \
907 _A + _PR + _G + _BL;}], \
908 ctype_irix=yes, ctype_irix=no)
909 AC_MSG_RESULT($ctype_irix)
910 if test $ctype_irix = "yes"; then
911 ctype_include_dir="config/os/irix"
916 dnl Test for <ctype> functionality -- newlib
917 if test $ctype_default = "yes"; then
918 AC_MSG_CHECKING([<ctype> for newlib])
919 AC_TRY_COMPILE([#include <ctype.h>],
922 { return _U + _L + _N + _S + _P + _C + _X + _B \
924 ctype_newlib=yes, ctype_newlib=no)
925 AC_MSG_RESULT($ctype_newlib)
926 if test $ctype_newlib = "yes"; then
927 ctype_include_dir="config/newlib"
932 if test $ctype_default = "yes"; then
933 ctype_include_dir="config/os/generic"
934 AC_MSG_WARN("Using default ctype headers.")
937 AC_LINK_FILES($ctype_include_dir/bits/ctype_base.h,
938 include/bits/ctype_base.h)
939 AC_LINK_FILES($ctype_include_dir/bits/ctype_inline.h,
940 include/bits/ctype_inline.h)
941 AC_LINK_FILES($ctype_include_dir/bits/ctype_noninline.h, \
942 include/bits/ctype_noninline.h)
948 dnl Check to see if this target can enable the wchar_t parts of libstdc++.
949 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
950 dnl must have been previously checked.)
952 dnl Define _GLIBCPP_USE_WCHAR_T if all the bits are found
953 dnl Define _GLIBCPP_NEED_MBSTATE_T if mbstate_t is not in wchar.h
955 dnl GLIBCPP_CHECK_WCHAR_T_SUPPORT
956 AC_DEFUN(GLIBCPP_CHECK_WCHAR_T_SUPPORT, [
957 if test x$enable_c_mbchar != xno; then
959 dnl Sanity check for existence of ISO C9X headers for extended encoding.
960 AC_CHECK_HEADER(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
961 AC_CHECK_HEADER(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
963 dnl Only continue checking if the ISO C9X headers exist.
964 if test x"$ac_has_wchar_h" = xyes && test x"$ac_has_wctype_h" = xyes; then
966 dnl Test wchar.h for mbstate_t, which is needed for char_traits
968 AC_MSG_CHECKING([for mbstate_t])
969 AC_TRY_COMPILE([#include <wchar.h>],
970 [mbstate_t teststate;],
971 use_native_mbstatet=yes, use_native_mbstatet=no)
972 AC_MSG_RESULT($use_native_mbstatet)
973 if test x"$use_native_mbstatet" = xno; then
974 AC_DEFINE(_GLIBCPP_NEED_MBSTATE_T)
977 dnl Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
978 dnl numeric_limits can instantiate type_traits<wchar_t>
979 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
980 AC_TRY_COMPILE([#include <wchar.h>],
981 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
982 has_wchar_minmax=yes, has_wchar_minmax=no)
983 AC_MSG_RESULT($has_wchar_minmax)
985 dnl Test wchar.h for WEOF, which is what we use to determine whether
986 dnl to specialize for char_traits<wchar_t> or not.
987 AC_MSG_CHECKING([for WEOF])
990 #include <stddef.h>],
992 has_weof=yes, has_weof=no)
993 AC_MSG_RESULT($has_weof)
995 dnl Tests for wide character functions used in char_traits<wchar_t>.
996 AC_CHECK_FUNCS(wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset \
997 wcsrtombs mbsrtowcs, ac_wfuncs=yes, ac_wfuncs=no)
999 AC_MSG_CHECKING([for ISO C9X wchar_t support])
1000 if test x"$has_weof" = xyes && test x"$has_wchar_minmax" = xyes \
1001 && test x"$ac_wfuncs" = xyes; then
1002 ac_isoC9X_wchar_t=yes
1004 ac_isoC9X_wchar_t=no
1006 AC_MSG_RESULT($ac_isoC9X_wchar_t)
1008 dnl Use iconv for wchar_t to char conversions. As such, check for
1009 dnl X/Open Portability Guide, version 2 features (XPG2).
1010 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
1011 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
1013 dnl Check for existence of libiconv.a providing XPG2 wchar_t support.
1014 AC_CHECK_LIB(iconv, iconv, libiconv="-liconv")
1015 ac_save_LIBS="$LIBS"
1016 LIBS="$LIBS $libiconv"
1018 AC_CHECK_FUNCS(iconv_open iconv_close iconv nl_langinfo, \
1019 ac_XPG2funcs=yes, ac_XPG2funcs=no)
1021 LIBS="$ac_save_LIBS"
1023 AC_MSG_CHECKING([for XPG2 wchar_t support])
1024 if test x"$ac_has_iconv_h" = xyes && test x"$ac_has_langinfo_h" = xyes \
1025 && test x"$ac_XPG2funcs" = xyes; then
1030 AC_MSG_RESULT($ac_XPG2_wchar_t)
1032 dnl At the moment, only enable wchar_t specializations if all the
1033 dnl above support is present.
1034 AC_MSG_CHECKING([for enabled wchar_t specializations])
1035 if test x"$ac_isoC9X_wchar_t" = xyes \
1036 && test x"$ac_XPG2_wchar_t" = xyes; then
1037 libinst_wstring_la="libinst-wstring.la"
1038 AC_DEFINE(_GLIBCPP_USE_WCHAR_T)
1039 AC_MSG_RESULT("yes")
1041 libinst_wstring_la=""
1044 AC_SUBST(libinst_wstring_la)
1047 AC_MSG_WARN([<wchar.h> not found])
1048 AC_DEFINE(_GLIBCPP_NEED_MBSTATE_T)
1052 dnl Wide characters disabled by the user. Maybe print a warning?
1059 dnl Check to see if this version of GNU C++ is afflicted by bugs in
1060 dnl __complex__ float support.
1062 dnl Define _GLIBCPP_BUGGY_FLOAT_COMPLEX if buggy.
1064 dnl Check to see if this version of GNU C++ is afflicted by bugs in
1065 dnl __complex__ support.Check for buggy __complex__ that will cause ICE in
1066 dnl gcc-2.95.x when using the library, unless we define the default copy
1067 dnl ctor in the specializations of complex<>.
1069 dnl Define _GLIBCPP_BUGGY_COMPLEX if buggy.
1070 dnl GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT
1071 AC_DEFUN(GLIBCPP_CHECK_COMPLEX_MATH_COMPILER_SUPPORT, [
1072 AC_REQUIRE([AC_PROG_CXX])
1074 AC_MSG_CHECKING([for GNU C++ __complex__ support])
1075 AC_CACHE_VAL(glibcpp_cv_complex, [
1078 AC_TRY_COMPILE([struct dcomplex { __complex__ double x; }; \
1079 dcomplex f(const dcomplex& x) { return dcomplex(x); }], \
1080 [ dcomplex x; f(x); ],
1081 glibcpp_cv_complex=ok,
1082 glibcpp_cv_complex=buggy
1086 AC_MSG_RESULT($glibcpp_cv_complex)
1087 if test $glibcpp_cv_complex = buggy; then
1088 AC_DEFINE(_GLIBCPP_BUGGY_COMPLEX)
1091 AC_MSG_CHECKING([for GNU C++ __complex__ float support])
1092 AC_CACHE_VAL(glibcpp_cv_float_complex, [
1096 cat > conftest.h <<EOB
1098 // Check for buggy __complex__ that causes ICE in most versions of egcs
1099 // and gcc-2.95.x on certain platforms (eg., x86-win32).
1101 // See http://gcc.gnu.org/ml/gcc-bugs/1999-07n/msg00845.html for
1102 // more info on the bug itself.
1107 __complex__ float m_value;
1108 float_complex (float = 0.0f, float = 0.0f);
1109 float_complex (__complex__ float val) : m_value (val) {}
1110 float_complex foo (const float_complex &val)
1111 { return float_complex (~val.m_value); }
1114 AC_TRY_COMPILE([#include "conftest.h"], ,
1115 glibcpp_cv_float_complex=ok,
1116 glibcpp_cv_float_complex=buggy
1120 AC_MSG_RESULT($glibcpp_cv_float_complex)
1121 if test $glibcpp_cv_float_complex = buggy; then
1122 AC_DEFINE(_GLIBCPP_BUGGY_FLOAT_COMPLEX)
1128 dnl Check for special debugging mode; not for production use.
1130 dnl GLIBCPP_ENABLE_DEBUG
1131 dnl --enable-debug sets '-ggdb3 -O0'.
1132 dnl --disable-debug sets '-g' and whatever optimization options the
1133 dnl compiler can handle.
1134 dnl + --enable-maintainer-mode automatically defaults this to on.
1135 dnl + Perhaps -D/-U of NDEBUG, DEBUG, DEBUG_ASSERT, ...?
1136 dnl + Usage: GLIBCPP_ENABLE_DEBUG[(DEFAULT)]
1137 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1138 dnl defaults to `no'.
1139 AC_DEFUN(GLIBCPP_ENABLE_DEBUG, [dnl
1140 define([GLIBCPP_ENABLE_DEBUG_DEFAULT], ifelse($1, yes, yes, no))dnl
1141 AC_ARG_ENABLE(debug,
1142 changequote(<<, >>)dnl
1143 << --enable-debug extra debugging, turn off optimization [default=>>GLIBCPP_ENABLE_DEBUG_DEFAULT],
1144 changequote([, ])dnl
1145 [case "${enableval}" in
1146 yes) enable_debug=yes ;;
1147 no) enable_debug=no ;;
1148 *) AC_MSG_ERROR([Unknown argument to enable/disable extra debugging]) ;;
1150 enable_debug=GLIBCPP_ENABLE_DEBUG_DEFAULT)dnl
1152 dnl Option parsed, now set things appropriately
1153 case "${enable_debug}" in
1155 DEBUG_FLAGS='-O0 -ggdb3'
1161 AC_SUBST(DEBUG_FLAGS)
1166 dnl Check for "unusual" flags to pass to the compiler while building.
1168 dnl GLIBCPP_ENABLE_CXX_FLAGS
1169 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1170 dnl experimental flags such as -fhonor-std, -fsquangle, -Dfloat=char, etc.
1171 dnl Somehow this same set of flags must be passed when [re]building
1173 dnl --disable-cxx-flags passes nothing.
1174 dnl + See http://sourceware.cygnus.com/ml/libstdc++/2000-q2/msg00131.html
1175 dnl http://sourceware.cygnus.com/ml/libstdc++/2000-q2/msg00284.html
1176 dnl http://sourceware.cygnus.com/ml/libstdc++/2000-q1/msg00035.html
1177 dnl + Usage: GLIBCPP_ENABLE_CXX_FLAGS(default flags)
1178 dnl If "default flags" is an empty string (or "none"), the effect is
1179 dnl the same as --disable or --enable=no.
1180 AC_DEFUN(GLIBCPP_ENABLE_CXX_FLAGS, [dnl
1181 define([GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT], ifelse($1,,, $1))dnl
1182 AC_ARG_ENABLE(cxx-flags,
1183 changequote(<<, >>)dnl
1184 << --enable-cxx-flags=FLAGS pass compiler FLAGS when building library;
1185 [default=>>GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT],
1186 changequote([, ])dnl
1187 [case "x$enableval" in
1189 AC_MSG_ERROR([--enable-cxx-flags needs compiler flags as arguments]) ;;
1191 enable_cxx_flags='' ;;
1193 enable_cxx_flags="$enableval" ;;
1195 enable_cxx_flags='GLIBCPP_ENABLE_CXX_FLAGS_DEFAULT')
1197 dnl Thinko on my part during design. This kludge is the workaround.
1198 if test "$enable_cxx_flags" = "none"; then
1199 enable_cxx_flags='';
1202 dnl Run through flags (either default or command-line) and set anything
1203 dnl extra (e.g., #defines) that must accompany particular g++ options.
1204 if test -n "$enable_cxx_flags"; then
1205 for f in $enable_cxx_flags; do
1209 *) # and we're trying to pass /what/ exactly?
1210 AC_MSG_ERROR([compiler flags start with a -]) ;;
1214 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1215 AC_SUBST(EXTRA_CXX_FLAGS)
1220 dnl Check for which I/O library to use: libio, or something specific.
1222 dnl GLIBCPP_ENABLE_CSTDIO
1223 dnl --enable-cstdio=libio sets config/c_io_libio.h and friends
1225 dnl default is libio
1227 AC_DEFUN(GLIBCPP_ENABLE_CSTDIO, [
1228 AC_MSG_CHECKING([for cstdio to use])
1229 AC_ARG_ENABLE(cstdio,
1230 [ --enable-cstdio enable GNU libio for target io package. (default)
1231 --enable-cstdio=LIB use LIB target-speific io package.],
1232 if test x$enable_cstdio = xno; then
1235 enable_cstdio=libio)
1237 enable_cstdio_flag=$enable_cstdio
1239 dnl Check if a valid I/O package
1240 case x${enable_cstdio_flag} in
1241 xlibio | x | xno | xnone | xyes)
1243 CSTDIO_H=config/c_io_libio.h
1244 CSTDIO_CC=config/c_io_libio.cc
1245 AC_MSG_RESULT(libio)
1247 # see if we are on a system with libio native (ie, linux)
1248 AC_CHECK_HEADER(libio.h, has_libio=yes, has_libio=no)
1250 # Need to check and see what version of glibc is being used. If
1251 # it's not glibc-2.2 or higher, then we'll need to go ahead and
1252 # compile most of libio for linux systems.
1253 if test x$has_libio = x"yes"; then
1256 AC_MSG_CHECKING([for glibc version >= 2.2])
1257 AC_EGREP_CPP([ok], [
1258 #include <features.h>
1259 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1262 ], glibc_satisfactory=yes, glibc_satisfactory=no)
1263 AC_MSG_RESULT($glibc_satisfactory)
1267 # XXX at the moment, admit defeat and force the recompilation
1268 # XXX of glibc even on glibc-2.2 systems, because libio is not synched.
1269 glibc_satisfactory=no
1271 if test x$glibc_satisfactory = x"yes"; then
1276 # bkoz XXX need to add checks to enable this
1277 # pme XXX here's a first pass at such a check
1278 if test x$enable_c_mbchar != xno; then
1286 # Using libio, but <libio.h> doesn't exist on the target system. . .
1288 # bkoz XXX need to add checks to enable this
1289 # pme XXX here's a first pass at such a check
1290 if test x$enable_c_mbchar != xno; then
1298 CSTDIO_H=config/c_io_stdio.h
1299 CSTDIO_CC=config/c_io_stdio.cc
1300 AC_MSG_RESULT(stdio)
1305 echo "$enable_cstdio is an unknown io package" 1>&2
1309 AC_LINK_FILES($CSTDIO_H, include/bits/c++io.h)
1310 AC_LINK_FILES($CSTDIO_CC, src/c++io.cc)
1312 # 2000-08-04 bkoz hack
1313 CCODECVT_C=config/c_io_libio_codecvt.c
1314 AC_LINK_FILES($CCODECVT_C, libio/c_codecvt.c)
1315 # 2000-08-04 bkoz hack
1317 AM_CONDITIONAL(GLIBCPP_NEED_LIBIO, test "$need_libio" = yes)
1318 AM_CONDITIONAL(GLIBCPP_NEED_WLIBIO, test "$need_wlibio" = yes)
1323 dnl Check for which threading library to use.
1325 dnl GLIBCPP_ENABLE_THREADS
1326 dnl --enable-threads=posix sets config/threads-posix.h et. al.
1328 dnl Default is no threads, which also disables _IO_MTSAFE_IO in
1329 dnl libio. Any actual thread package will enable it.
1331 AC_DEFUN(GLIBCPP_ENABLE_THREADS, [
1332 dnl Note this comes from the gcc/config.in and libjava/config.in
1333 dnl Efforts should be made to keep this in sync.
1334 AC_MSG_CHECKING([for threads package to use])
1335 AC_ARG_ENABLE(threads,
1336 [ --enable-threads enable thread usage for target GCC.
1337 --enable-threads=LIB use LIB thread package for target GCC.],
1338 if test x$enable_threads = xno; then
1343 enable_threads_flag=$enable_threads
1345 dnl Check if a valid thread package
1346 case x${enable_threads_flag} in
1349 target_thread_file='single'
1353 target_thread_file='posix'
1355 xdecosf1 | xirix | xmach | xos2 | xposix | xpthreads | xsingle | \
1356 xsolaris | xwin32 | xdce | xvxworks)
1357 target_thread_file=$enable_threads_flag
1360 echo "$enable_threads is an unknown thread package" 1>&2
1365 dnl Check for thread package actually supported in libstdc++
1367 case "$target_thread_file" in
1369 THREADH=threads-no.h
1372 THREADH=threads-posix.h
1374 decosf1 | irix | mach | os2 | solaris | win32 | dce | vxworks)
1375 AC_MSG_ERROR(thread package $THREADS not yet supported)
1378 AC_MSG_ERROR($THREADS is an unsupported/unknown thread package)
1381 AC_MSG_RESULT($THREADH)
1383 AC_LINK_FILES(config/$THREADH, include/bits/c++threads.h)
1384 if test $THREADH != threads-no.h; then
1385 AC_DEFINE(_GLIBCPP_USE_THREADS)
1390 dnl Enable atomic locking
1391 dnl GLIBCPP_ENABLE_ATOMICITY
1392 AC_DEFUN(GLIBCPP_ENABLE_ATOMICITY, [
1393 AC_MSG_CHECKING([for atomicity.h])
1395 *-*-linux* | sparc*-*-* | *-*-freebsd*)
1396 ATOMICITYH=$cpu_include_dir
1398 *-*-aix* | *-*-irix*)
1399 ATOMICITYH=$os_include_dir
1402 # bit of overkill on this text...
1403 AC_MSG_ERROR([Atomic locking requested, but $enable_threads is an unknown thread package and atomic operations are not present in the CPU])
1406 AC_MSG_RESULT($ATOMICITYH/bits/atomicity.h)
1407 AC_LINK_FILES($ATOMICITYH/bits/atomicity.h, include/bits/atomicity.h)
1412 dnl Check for template specializations for the 'long long' type extension.
1414 dnl GLIBCPP_ENABLE_LONG_LONG
1415 dnl --enable-long-long defines _GLIBCPP_USE_LONG_LONG
1416 dnl --disable-long-long leaves _GLIBCPP_USE_LONG_LONG undefined
1417 dnl + Usage: GLIBCPP_ENABLE_LONG_LONG[(DEFAULT)]
1418 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1419 dnl defaults to `no'.
1420 dnl + If 'long long' stuff is not available, ignores DEFAULT and sets `no'.
1422 dnl GLIBCPP_ENABLE_LONG_LONG
1423 AC_DEFUN(GLIBCPP_ENABLE_LONG_LONG, [dnl
1424 define([GLIBCPP_ENABLE_LONG_LONG_DEFAULT], ifelse($1, yes, yes, no))dnl
1426 AC_ARG_ENABLE(long-long,
1427 changequote(<<, >>)dnl
1428 <<--enable-long-long turns on 'long long' [default=>>GLIBCPP_ENABLE_LONG_LONG_DEFAULT],
1429 changequote([, ])dnl
1430 [case "$enableval" in
1431 yes) enable_long_long=yes ;;
1432 no) enable_long_long=no ;;
1433 *) AC_MSG_ERROR([Unknown argument to enable/disable long long]) ;;
1435 enable_long_long=GLIBCPP_ENABLE_LONG_LONG_DEFAULT)dnl
1437 # Check for the existance of functions used if long long is enabled.
1438 AC_CHECK_FUNC(strtoll,,ac_strtoll=no)
1439 AC_CHECK_FUNC(strtoull,,ac_strtoull=no)
1441 AC_MSG_CHECKING([for enabled long long])
1442 if test x"$ac_strtoll" = xno || test x"$ac_strtoull" = xno; then
1443 enable_long_long=no;
1445 AC_MSG_RESULT($enable_long_long)
1447 dnl Option parsed, now set things appropriately
1448 if test x"$enable_long_long" = xyes; then
1449 AC_DEFINE(_GLIBCPP_USE_LONG_LONG)
1455 dnl Check for whether or not to do shadowed C headers.
1457 dnl GLIBCPP_ENABLE_SHADOW
1458 dnl --enable-cshadow-headers [does stuff].
1459 dnl --disable-cshadow-headers [does not do stuff].
1460 dnl + This will eventually need to be on by default.
1461 dnl + Usage: GLIBCPP_ENABLE_SHADOW[(DEFAULT)]
1462 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1463 dnl defaults to `no'.
1464 AC_DEFUN(GLIBCPP_ENABLE_SHADOW, [dnl
1465 define([GLIBCPP_ENABLE_SHADOW_DEFAULT], ifelse($1, yes, yes, no))dnl
1466 AC_MSG_CHECKING([for enabled cshadow headers])
1467 AC_ARG_ENABLE(cshadow-headers,
1468 changequote(<<, >>)dnl
1469 << --enable-cshadow-headers construct "shadowed" C header files for
1470 g++ [default=>>GLIBCPP_ENABLE_SHADOW_DEFAULT],
1472 [case "$enableval" in
1473 yes) enable_cshadow_headers=yes
1475 no) enable_cshadow_headers=no
1477 *) AC_MSG_ERROR([Unknown argument to enable/disable shadowed C headers])
1480 enable_cshadow_headers=GLIBCPP_ENABLE_SHADOW_DEFAULT)
1481 AC_MSG_RESULT($enable_cshadow_headers)
1483 dnl Option parsed, now set things appropriately
1484 dnl NB: these things may be duplicated in c++config.h as well.
1485 case "$enable_cshadow_headers" in
1487 CSHADOW_FLAGS="-fno-builtin"
1488 C_INCLUDE_DIR='${top_srcdir}/include/c_std'
1489 AC_DEFINE(_GLIBCPP_USE_SHADOW_HEADERS)
1493 C_INCLUDE_DIR='${top_srcdir}/include/c'
1497 AC_SUBST(CSHADOW_FLAGS)
1498 AC_SUBST(C_INCLUDE_DIR)
1499 AM_CONDITIONAL(GLIBCPP_USE_CSHADOW, test "$enable_cshadow_headers" = yes)
1504 dnl Check for wide character support. Has the same effect as the option
1505 dnl in gcc's configure, but in a form that autoconf can mess with.
1507 dnl GLIBCPP_ENABLE_C_MBCHAR
1508 dnl --enable-c-mbchar requests all the wchar_t stuff.
1509 dnl --disable-c-mbchar doesn't.
1510 dnl + Usage: GLIBCPP_ENABLE_C_MBCHAR[(DEFAULT)]
1511 dnl Where DEFAULT is either `yes' or `no'. If ommitted, it
1512 dnl defaults to `no'.
1513 AC_DEFUN(GLIBCPP_ENABLE_C_MBCHAR, [dnl
1514 define([GLIBCPP_ENABLE_C_MBCHAR_DEFAULT], ifelse($1, yes, yes, no))dnl
1515 AC_ARG_ENABLE(c-mbchar,
1516 changequote(<<, >>)dnl
1517 << --enable-c-mbchar enable multibyte (wide) characters [default=>>GLIBCPP_ENABLE_C_MBCHAR_DEFAULT],
1518 changequote([, ])dnl
1519 [case "$enableval" in
1520 yes) enable_c_mbchar=yes ;;
1521 no) enable_c_mbchar=no ;;
1522 *) AC_MSG_ERROR([Unknown argument to enable/disable c-mbchar]) ;;
1524 enable_c_mbchar=GLIBCPP_ENABLE_C_MBCHAR_DEFAULT)dnl
1525 dnl Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1530 dnl Set up *_INCLUDES and *_INCLUDE_DIR variables for all sundry Makefile.am's.
1532 dnl GLIBCPP_INCLUDE_DIR
1534 dnl TOPLEVEL_INCLUDES
1535 dnl LIBMATH_INCLUDES
1536 dnl LIBSUPCXX_INCLUDES
1538 dnl CSHADOW_INCLUDES
1540 dnl GLIBCPP_EXPORT_INCLUDE
1541 AC_DEFUN(GLIBCPP_EXPORT_INCLUDES, [
1542 # Root level of the include sources.
1543 GLIBCPP_INCLUDE_DIR='$(top_srcdir)/include'
1545 # Can either use include/c or include/c_std to grab "C" headers. This
1546 # variable is set to the include directory currently in use.
1547 # set with C_INCLUDE_DIR in GLIBCPP_ENABLE_SHADOW
1549 # Passed down for cross compilers, canadian crosses.
1550 TOPLEVEL_INCLUDES='-I$(includedir)'
1552 LIBMATH_INCLUDES='-I$(top_srcdir)/libmath'
1554 LIBSUPCXX_INCLUDES='-I$(top_srcdir)/libsupc++'
1556 #if GLIBCPP_NEED_LIBIO
1557 LIBIO_INCLUDES='-I$(top_builddir)/libio -I$(top_srcdir)/libio'
1559 #LIBIO_INCLUDES='-I$(top_srcdir)/libio'
1562 #if GLIBCPP_USE_CSHADOW
1563 # CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR) \
1564 # -I$(top_blddir)/cshadow'
1566 CSHADOW_INCLUDES='-I$(GLIBCPP_INCLUDE_DIR)/std -I$(C_INCLUDE_DIR)'
1569 # Now, export this to all the little Makefiles....
1570 AC_SUBST(GLIBCPP_INCLUDE_DIR)
1571 AC_SUBST(TOPLEVEL_INCLUDES)
1572 AC_SUBST(LIBMATH_INCLUDES)
1573 AC_SUBST(LIBSUPCXX_INCLUDES)
1574 AC_SUBST(LIBIO_INCLUDES)
1575 AC_SUBST(CSHADOW_INCLUDES)
1580 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
1582 AC_DEFUN(GLIBCPP_EXPORT_FLAGS, [
1583 # Optimization flags that are probably a good idea for thrill-seekers. Just
1584 # uncomment the lines below and make, everything else is ready to go...
1585 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
1587 AC_SUBST(OPTIMIZE_CXXFLAGS)
1589 WARN_FLAGS='-Wall -Wno-format -W -Wwrite-strings -Winline'
1590 AC_SUBST(WARN_FLAGS)
1594 # Check whether LC_MESSAGES is available in <locale.h>.
1595 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1597 # This file file be copied and used freely without restrictions. It can
1598 # be used in projects which are not available under the GNU Public License
1599 # but which still want to provide support for the GNU gettext functionality.
1600 # Please note that the actual code is *not* freely available.
1604 AC_DEFUN(AC_LC_MESSAGES,
1605 [if test $ac_cv_header_locale_h = yes; then
1606 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1607 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1608 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1609 if test $ac_cv_val_LC_MESSAGES = yes; then
1610 AC_DEFINE(HAVE_LC_MESSAGES)
1615 # Check for functions in math library.
1616 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1618 # This file can be copied and used freely without restrictions. It can
1619 # be used in projects which are not available under the GNU Public License
1620 # but which still want to provide support for the GNU gettext functionality.
1621 # Please note that the actual code is *not* freely available.
1625 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
1626 AC_DEFUN(AC_REPLACE_MATHFUNCS,
1627 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])
1628 AC_SUBST(LIBMATHOBJS)dnl
1632 # Check for string functions.
1633 # Ulrich Drepper <drepper@cygnus.com>, 1998.
1635 # This file can 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 dnl AC_REPLACE_STRINGFUNCS(FUNCTION...)
1643 AC_DEFUN(AC_REPLACE_STRINGFUNCS,
1644 [AC_CHECK_FUNCS([$1], , [LIBSTRINGOBJS="$LIBSTRINGOBJS ${ac_func}.lo"])
1645 AC_SUBST(LIBSTRINGOBJS)dnl
1649 dnl This macro searches for a GNU version of make. If a match is found, the
1650 dnl makefile variable `ifGNUmake' is set to the empty string, otherwise it is
1651 dnl set to "#". This is useful for including a special features in a Makefile,
1652 dnl which cannot be handled by other versions of make. The variable
1653 dnl _cv_gnu_make_command is set to the command to invoke GNU make if it exists,
1654 dnl the empty string otherwise.
1656 dnl Here is an example of its use:
1658 dnl Makefile.in might contain:
1660 dnl # A failsafe way of putting a dependency rule into a makefile
1662 dnl $(CC) -MM $(srcdir)/*.c > $(DEPEND)
1664 dnl @ifGNUmake@ ifeq ($(DEPEND),$(wildcard $(DEPEND)))
1665 dnl @ifGNUmake@ include $(DEPEND)
1666 dnl @ifGNUmake@ endif
1668 dnl Then configure.in would normally contain:
1670 dnl CHECK_GNU_MAKE()
1671 dnl AC_OUTPUT(Makefile)
1673 dnl Then perhaps to cause gnu make to override any other make, we could do
1674 dnl something like this (note that GNU make always looks for GNUmakefile first):
1676 dnl if ! test x$_cv_gnu_make_command = x ; then
1677 dnl mv Makefile GNUmakefile
1678 dnl echo .DEFAULT: > Makefile ;
1679 dnl echo \ $_cv_gnu_make_command \$@ >> Makefile;
1682 dnl Then, if any (well almost any) other make is called, and GNU make also
1683 dnl exists, then the other make wraps the GNU make.
1685 dnl @author John Darrington <j.darrington@elvis.murdoch.edu.au>
1686 dnl @version 1.1 #### replaced Id string now that Id is for lib-v3; pme
1688 dnl #### Changes for libstdc++-v3: reformatting and linewrapping; prepending
1689 dnl #### GLIBCPP_ to the macro name; adding the :-make fallback in the
1690 dnl #### conditional's subshell (" --version" is not a command), using a
1691 dnl #### different option to grep(1).
1694 GLIBCPP_CHECK_GNU_MAKE, [AC_CACHE_CHECK( for GNU make,_cv_gnu_make_command,
1695 _cv_gnu_make_command='' ;
1696 dnl Search all the common names for GNU make
1697 for a in "${MAKE:-make}" make gmake gnumake ; do
1698 if ( $a --version 2> /dev/null | grep -c GNU > /dev/null )
1700 _cv_gnu_make_command=$a ;
1705 dnl If there was a GNU version, then set @ifGNUmake@ to the empty
1706 dnl string, '#' otherwise
1707 if test "x$_cv_gnu_make_command" != "x" ; then
1715 sinclude(../libtool.m4)
1716 dnl The lines below arrange for aclocal not to bring an installed
1717 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1718 dnl add a definition of LIBTOOL to Makefile.in.
1719 ifelse(,,,[AC_SUBST(LIBTOOL)
1720 AC_DEFUN([AM_PROG_LIBTOOL])
1721 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1722 AC_DEFUN([AC_PROG_LD])