| blob | a1e301fdaa9bad7347aeaf693cc1357689c053c4 |
1 dnl
2 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
3 dnl
4 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
5 dnl end of configure. This lets tested variables be reassigned, and the
6 dnl conditional will depend on the final state of the variable. For a simple
7 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
8 dnl
9 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
10 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
11 m4_divert_text([glibcxx_diversion],dnl
12 AM_CONDITIONAL([$1],[$2])
13 )dnl
14 ])dnl
15 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
18 dnl
19 dnl Check to see what architecture and operating system we are compiling
20 dnl for. Also, if architecture- or OS-specific flags are required for
21 dnl compilation, pick them up here.
22 dnl
23 AC_DEFUN([GLIBCXX_CHECK_HOST], [
24 . $glibcxx_srcdir/configure.host
25 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
26 AC_MSG_NOTICE([OS config directory is $os_include_dir])
27 ])
29 dnl
30 dnl Initialize the rest of the library configury. At this point we have
31 dnl variables like $host.
32 dnl
33 dnl Sets:
34 dnl SUBDIRS
35 dnl Substs:
36 dnl glibcxx_builddir (absolute path)
37 dnl glibcxx_srcdir (absolute path)
38 dnl toplevel_builddir (absolute path)
39 dnl toplevel_srcdir (absolute path)
40 dnl with_cross_host
41 dnl with_newlib
42 dnl with_target_subdir
43 dnl plus
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
47 dnl
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libsupc++ python src src/c++98 src/c++11 doc po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
59 case $srcdir in
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
62 esac
63 toplevel_builddir=${glibcxx_builddir}/..
64 toplevel_srcdir=${glibcxx_srcdir}/..
65 AC_SUBST(glibcxx_builddir)
66 AC_SUBST(glibcxx_srcdir)
67 AC_SUBST(toplevel_builddir)
68 AC_SUBST(toplevel_srcdir)
70 # We use these options to decide which functions to include. They are
71 # set from the top level.
72 AC_ARG_WITH([target-subdir],
73 AC_HELP_STRING([--with-target-subdir=SUBDIR],
74 [configuring in a subdirectory]))
76 AC_ARG_WITH([cross-host],
77 AC_HELP_STRING([--with-cross-host=HOST],
78 [configuring with a cross compiler]))
80 AC_ARG_WITH([newlib],
81 AC_HELP_STRING([--with-newlib],
82 [assume newlib as a system C library]))
84 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
85 # available). Uncomment the next line to force a particular method.
86 AC_PROG_LN_S
87 #LN_S='cp -p'
89 AC_CHECK_TOOL(AS, as)
90 AC_CHECK_TOOL(AR, ar)
91 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
93 AM_MAINTAINER_MODE
95 # Set up safe default values for all subsequent AM_CONDITIONAL tests
96 # which are themselves conditionally expanded.
97 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
98 ## other macros from doing the same. This should be automated.) -pme
100 # Check for C library flavor since GNU/Linux platforms use different
101 # configuration directories depending on the C library in use.
102 AC_EGREP_CPP([_using_uclibc], [
103 #include <stdio.h>
104 #if __UCLIBC__
105 _using_uclibc
106 #endif
107 ], uclibc=yes, uclibc=no)
109 AC_EGREP_CPP([_using_bionic], [
110 #include <stdio.h>
111 #if __BIONIC__
112 _using_bionic
113 #endif
114 ], bionic=yes, bionic=no)
116 # Find platform-specific directories containing configuration info.
117 # Also possibly modify flags used elsewhere, as needed by the platform.
118 GLIBCXX_CHECK_HOST
119 ])
122 dnl
123 dnl Tests for newer compiler features, or features that are present in newer
124 dnl compiler versions but not older compiler versions still in use, should
125 dnl be placed here.
126 dnl
127 dnl Defines:
128 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
129 dnl new inlining code or the new system_header pragma will die on -Werror.
130 dnl Leave it out by default and use maint-mode to use it.
131 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
132 dnl compiler supports it and the user has not requested debug mode.
133 dnl
134 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
135 # All these tests are for C++; save the language and the compiler flags.
136 # The CXXFLAGS thing is suspicious, but based on similar bits previously
137 # found in GLIBCXX_CONFIGURE.
138 AC_LANG_SAVE
139 AC_LANG_CPLUSPLUS
140 ac_test_CXXFLAGS="${CXXFLAGS+set}"
141 ac_save_CXXFLAGS="$CXXFLAGS"
143 # Check for maintainer-mode bits.
144 if test x"$USE_MAINTAINER_MODE" = xno; then
145 WERROR=''
146 else
147 WERROR='-Werror'
148 fi
150 # Check for -ffunction-sections -fdata-sections
151 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
152 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
153 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
154 if test "$ac_test_CXXFLAGS" = set; then
155 CXXFLAGS="$ac_save_CXXFLAGS"
156 else
157 # this is the suspicious part
158 CXXFLAGS=''
159 fi
160 if test x"$ac_fdsections" = x"yes"; then
161 SECTION_FLAGS='-ffunction-sections -fdata-sections'
162 fi
163 AC_MSG_RESULT($ac_fdsections)
165 AC_LANG_RESTORE
166 AC_SUBST(WERROR)
167 AC_SUBST(SECTION_FLAGS)
168 ])
171 dnl
172 dnl Check if the assembler used supports disabling generation of hardware
173 dnl capabilities. This is only supported by Sun as at the moment.
174 dnl
175 dnl Defines:
176 dnl HWCAP_FLAGS='-Wa,-nH' if possible.
177 dnl
178 AC_DEFUN([GLIBCXX_CHECK_ASSEMBLER_HWCAP], [
179 test -z "$HWCAP_FLAGS" && HWCAP_FLAGS=''
181 # Restrict the test to Solaris, other assemblers (e.g. AIX as) have -nH
182 # with a different meaning.
183 case ${target_os} in
184 solaris2*)
185 ac_save_CFLAGS="$CFLAGS"
186 CFLAGS="$CFLAGS -Wa,-nH"
188 AC_MSG_CHECKING([for as that supports -Wa,-nH])
189 AC_TRY_COMPILE([], [return 0;], [ac_hwcap_flags=yes],[ac_hwcap_flags=no])
190 if test "$ac_hwcap_flags" = "yes"; then
191 HWCAP_FLAGS="-Wa,-nH $HWCAP_FLAGS"
192 fi
193 AC_MSG_RESULT($ac_hwcap_flags)
195 CFLAGS="$ac_save_CFLAGS"
196 ;;
197 esac
199 AC_SUBST(HWCAP_FLAGS)
200 ])
203 dnl
204 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
205 dnl the native linker is in use, all variables will be defined to something
206 dnl safe (like an empty string).
207 dnl
208 dnl Defines:
209 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
210 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
211 dnl LD (as a side effect of testing)
212 dnl Sets:
213 dnl with_gnu_ld
214 dnl glibcxx_ld_is_gold (set to "no" or "yes")
215 dnl glibcxx_gnu_ld_version (possibly)
216 dnl
217 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
218 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
219 dnl
220 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
221 # If we're not using GNU ld, then there's no point in even trying these
222 # tests. Check for that first. We should have already tested for gld
223 # by now (in libtool), but require it now just to be safe...
224 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
225 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
226 AC_REQUIRE([AC_PROG_LD])
227 AC_REQUIRE([AC_PROG_AWK])
229 # The name set by libtool depends on the version of libtool. Shame on us
230 # for depending on an impl detail, but c'est la vie. Older versions used
231 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
232 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
233 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
234 # set (hence we're using an older libtool), then set it.
235 if test x${with_gnu_ld+set} != xset; then
236 if test x${ac_cv_prog_gnu_ld+set} != xset; then
237 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
238 with_gnu_ld=no
239 else
240 with_gnu_ld=$ac_cv_prog_gnu_ld
241 fi
242 fi
244 # Start by getting the version number. I think the libtool test already
245 # does some of this, but throws away the result.
246 glibcxx_ld_is_gold=no
247 if test x"$with_gnu_ld" = x"yes"; then
248 AC_MSG_CHECKING([for ld version])
249 changequote(,)
250 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
251 glibcxx_ld_is_gold=yes
252 fi
253 ldver=`$LD --version 2>/dev/null |
254 sed -e 's/GNU gold /GNU ld /;s/GNU ld version /GNU ld /;s/GNU ld ([^)]*) /GNU ld /;s/GNU ld \([0-9.][0-9.]*\).*/\1/; q'`
255 changequote([,])
256 glibcxx_gnu_ld_version=`echo $ldver | \
257 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
258 AC_MSG_RESULT($glibcxx_gnu_ld_version)
259 fi
261 # Set --gc-sections.
262 glibcxx_have_gc_sections=no
263 if test "$glibcxx_ld_is_gold" = "yes"; then
264 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
265 glibcxx_have_gc_sections=yes
266 fi
267 else
268 glibcxx_gcsections_min_ld=21602
269 if test x"$with_gnu_ld" = x"yes" &&
270 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
271 glibcxx_have_gc_sections=yes
272 fi
273 fi
274 if test "$glibcxx_have_gc_sections" = "yes"; then
275 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
276 # NB: This flag only works reliably after 2.16.1. Configure tests
277 # for this are difficult, so hard wire a value that should work.
279 ac_test_CFLAGS="${CFLAGS+set}"
280 ac_save_CFLAGS="$CFLAGS"
281 CFLAGS='-Wl,--gc-sections'
283 # Check for -Wl,--gc-sections
284 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
285 AC_TRY_LINK([ int one(void) { return 1; }
286 int two(void) { return 2; }
287 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
288 if test "$ac_gcsections" = "yes"; then
289 rm -f conftest.c
290 touch conftest.c
291 if $CC -c conftest.c; then
292 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
293 grep "Warning: gc-sections option ignored" > /dev/null; then
294 ac_gcsections=no
295 fi
296 fi
297 rm -f conftest.c conftest.o conftest
298 fi
299 if test "$ac_gcsections" = "yes"; then
300 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
301 fi
302 AC_MSG_RESULT($ac_gcsections)
304 if test "$ac_test_CFLAGS" = set; then
305 CFLAGS="$ac_save_CFLAGS"
306 else
307 # this is the suspicious part
308 CFLAGS=''
309 fi
310 fi
312 # Set -z,relro.
313 # Note this is only for shared objects.
314 ac_ld_relro=no
315 if test x"$with_gnu_ld" = x"yes"; then
316 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
317 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
318 if test -n "$cxx_z_relo"; then
319 OPT_LDFLAGS="-Wl,-z,relro"
320 ac_ld_relro=yes
321 fi
322 AC_MSG_RESULT($ac_ld_relro)
323 fi
325 # Set linker optimization flags.
326 if test x"$with_gnu_ld" = x"yes"; then
327 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
328 fi
330 AC_SUBST(SECTION_LDFLAGS)
331 AC_SUBST(OPT_LDFLAGS)
332 ])
335 dnl
336 dnl Check for headers for, and arguments to, the setrlimit() function.
337 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
338 dnl
339 dnl Defines:
340 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
341 dnl various HAVE_LIMIT_* for individual limit names
342 dnl
343 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
344 AC_MSG_CHECKING([for RLIMIT_$1])
345 AC_TRY_COMPILE(
346 [#include <unistd.h>
347 #include <sys/time.h>
348 #include <sys/resource.h>
349 ],
350 [ int f = RLIMIT_$1 ; ],
351 [glibcxx_mresult=1], [glibcxx_mresult=0])
352 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
353 [Only used in build directory testsuite_hooks.h.])
354 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
355 AC_MSG_RESULT($res)
356 ])
358 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
359 setrlimit_have_headers=yes
360 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
361 [],
362 [setrlimit_have_headers=no])
363 # If don't have the headers, then we can't run the tests now, and we
364 # won't be seeing any of these during testsuite compilation.
365 if test $setrlimit_have_headers = yes; then
366 # Can't do these in a loop, else the resulting syntax is wrong.
367 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
368 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
369 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
370 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
371 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
373 # Check for rlimit, setrlimit.
374 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
375 AC_TRY_COMPILE(
376 [#include <unistd.h>
377 #include <sys/time.h>
378 #include <sys/resource.h>
379 ],
380 [struct rlimit r;
381 setrlimit(0, &r);],
382 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
383 ])
384 fi
386 AC_MSG_CHECKING([for testsuite resource limits support])
387 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
388 ac_res_limits=yes
389 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
390 [Define if using setrlimit to set resource limits during
391 "make check"])
392 else
393 ac_res_limits=no
394 fi
395 AC_MSG_RESULT($ac_res_limits)
396 ])
399 dnl
400 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
401 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
402 dnl
403 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
405 AC_LANG_SAVE
406 AC_LANG_CPLUSPLUS
407 ac_save_CXXFLAGS="$CXXFLAGS"
408 CXXFLAGS="$CXXFLAGS -fno-exceptions"
410 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
411 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
412 GCC_TRY_COMPILE_OR_LINK(
413 [#include <sys/stat.h>],
414 [struct stat buffer;
415 fstat(0, &buffer);
416 S_ISREG(buffer.st_mode);],
417 [glibcxx_cv_S_ISREG=yes],
418 [glibcxx_cv_S_ISREG=no])
419 ])
420 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
421 GCC_TRY_COMPILE_OR_LINK(
422 [#include <sys/stat.h>],
423 [struct stat buffer;
424 fstat(0, &buffer);
425 S_IFREG & buffer.st_mode;],
426 [glibcxx_cv_S_IFREG=yes],
427 [glibcxx_cv_S_IFREG=no])
428 ])
429 res=no
430 if test $glibcxx_cv_S_ISREG = yes; then
431 AC_DEFINE(HAVE_S_ISREG, 1,
432 [Define if S_IFREG is available in <sys/stat.h>.])
433 res=S_ISREG
434 elif test $glibcxx_cv_S_IFREG = yes; then
435 AC_DEFINE(HAVE_S_IFREG, 1,
436 [Define if S_IFREG is available in <sys/stat.h>.])
437 res=S_IFREG
438 fi
439 AC_MSG_RESULT($res)
441 CXXFLAGS="$ac_save_CXXFLAGS"
442 AC_LANG_RESTORE
443 ])
446 dnl
447 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
448 dnl
449 AC_DEFUN([GLIBCXX_CHECK_POLL], [
451 AC_LANG_SAVE
452 AC_LANG_CPLUSPLUS
453 ac_save_CXXFLAGS="$CXXFLAGS"
454 CXXFLAGS="$CXXFLAGS -fno-exceptions"
456 AC_MSG_CHECKING([for poll])
457 AC_CACHE_VAL(glibcxx_cv_POLL, [
458 GCC_TRY_COMPILE_OR_LINK(
459 [#include <poll.h>],
460 [struct pollfd pfd[1];
461 pfd[0].events = POLLIN;
462 poll(pfd, 1, 0);],
463 [glibcxx_cv_POLL=yes],
464 [glibcxx_cv_POLL=no])
465 ])
466 if test $glibcxx_cv_POLL = yes; then
467 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
468 fi
469 AC_MSG_RESULT($glibcxx_cv_POLL)
471 CXXFLAGS="$ac_save_CXXFLAGS"
472 AC_LANG_RESTORE
473 ])
476 dnl
477 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
478 dnl
479 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
481 AC_LANG_SAVE
482 AC_LANG_CPLUSPLUS
483 ac_save_CXXFLAGS="$CXXFLAGS"
484 CXXFLAGS="$CXXFLAGS -fno-exceptions"
486 AC_MSG_CHECKING([for writev])
487 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
488 GCC_TRY_COMPILE_OR_LINK(
489 [#include <sys/uio.h>],
490 [struct iovec iov[2];
491 writev(0, iov, 0);],
492 [glibcxx_cv_WRITEV=yes],
493 [glibcxx_cv_WRITEV=no])
494 ])
495 if test $glibcxx_cv_WRITEV = yes; then
496 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
497 fi
498 AC_MSG_RESULT($glibcxx_cv_WRITEV)
500 CXXFLAGS="$ac_save_CXXFLAGS"
501 AC_LANG_RESTORE
502 ])
505 dnl
506 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
507 dnl Also check whether int64_t is actually a typedef to long or long long.
508 dnl
509 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
511 AC_LANG_SAVE
512 AC_LANG_CPLUSPLUS
514 AC_MSG_CHECKING([for int64_t])
515 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
516 AC_TRY_COMPILE(
517 [#include <stdint.h>],
518 [int64_t var;],
519 [glibcxx_cv_INT64_T=yes],
520 [glibcxx_cv_INT64_T=no])
521 ])
523 if test $glibcxx_cv_INT64_T = yes; then
524 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
525 AC_MSG_RESULT($glibcxx_cv_INT64_T)
527 AC_MSG_CHECKING([for int64_t as long])
528 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
529 AC_TRY_COMPILE(
530 [#include <stdint.h>
531 template<typename, typename> struct same { enum { value = -1 }; };
532 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
533 int array[same<int64_t, long>::value];], [],
534 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
535 ])
537 if test $glibcxx_cv_int64_t_long = yes; then
538 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
539 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
540 fi
542 AC_MSG_CHECKING([for int64_t as long long])
543 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
544 AC_TRY_COMPILE(
545 [#include <stdint.h>
546 template<typename, typename> struct same { enum { value = -1 }; };
547 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
548 int array[same<int64_t, long long>::value];], [],
549 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
550 ])
552 if test $glibcxx_cv_int64_t_long_long = yes; then
553 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
554 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
555 fi
556 fi
558 AC_LANG_RESTORE
559 ])
562 dnl
563 dnl Check whether LFS support is available.
564 dnl
565 AC_DEFUN([GLIBCXX_CHECK_LFS], [
566 AC_LANG_SAVE
567 AC_LANG_CPLUSPLUS
568 ac_save_CXXFLAGS="$CXXFLAGS"
569 CXXFLAGS="$CXXFLAGS -fno-exceptions"
570 AC_MSG_CHECKING([for LFS support])
571 AC_CACHE_VAL(glibcxx_cv_LFS, [
572 GCC_TRY_COMPILE_OR_LINK(
573 [#include <unistd.h>
574 #include <stdio.h>
575 #include <sys/stat.h>
576 ],
577 [FILE* fp;
578 fopen64("t", "w");
579 fseeko64(fp, 0, SEEK_CUR);
580 ftello64(fp);
581 lseek64(1, 0, SEEK_CUR);
582 struct stat64 buf;
583 fstat64(1, &buf);],
584 [glibcxx_cv_LFS=yes],
585 [glibcxx_cv_LFS=no])
586 ])
587 if test $glibcxx_cv_LFS = yes; then
588 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
589 fi
590 AC_MSG_RESULT($glibcxx_cv_LFS)
591 CXXFLAGS="$ac_save_CXXFLAGS"
592 AC_LANG_RESTORE
593 ])
596 dnl
597 dnl Check for whether a fully dynamic basic_string implementation should
598 dnl be turned on, that does not put empty objects in per-process static
599 dnl memory (mostly useful together with shared memory allocators, see PR
600 dnl libstdc++/16612 for details).
601 dnl
602 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
603 dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
604 dnl otherwise undefined
605 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
606 dnl Where DEFAULT is either `yes' or `no'.
607 dnl
608 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
609 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
610 if test $enable_fully_dynamic_string = yes; then
611 enable_fully_dynamic_string_def=1
612 else
613 enable_fully_dynamic_string_def=0
614 fi
615 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
616 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
617 ])
620 dnl
621 dnl Does any necessary configuration of the testsuite directory. Generates
622 dnl the testsuite_hooks.h header.
623 dnl
624 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
625 dnl
626 dnl Sets:
627 dnl enable_abi_check
628 dnl GLIBCXX_TEST_WCHAR_T
629 dnl GLIBCXX_TEST_THREAD
630 dnl Substs:
631 dnl baseline_dir
632 dnl baseline_subdir_switch
633 dnl
634 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
635 if $GLIBCXX_IS_NATIVE ; then
636 # Do checks for resource limit functions.
637 GLIBCXX_CHECK_SETRLIMIT
639 # Look for setenv, so that extended locale tests can be performed.
640 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
641 fi
643 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
644 test $enable_symvers != no; then
645 case "$host" in
646 *-*-cygwin*)
647 enable_abi_check=no ;;
648 *)
649 enable_abi_check=yes ;;
650 esac
651 else
652 # Only build this as native, since automake does not understand
653 # CXX_FOR_BUILD.
654 enable_abi_check=no
655 fi
657 # Export file names for ABI checking.
658 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
659 AC_SUBST(baseline_dir)
660 baseline_subdir_switch="$abi_baseline_subdir_switch"
661 AC_SUBST(baseline_subdir_switch)
662 ])
665 dnl
666 dnl Does any necessary configuration for docbook in the docs directory.
667 dnl
668 dnl XSLTPROC must be set before this
669 dnl
670 dnl Sets:
671 dnl glibcxx_stylesheets
672 dnl Substs:
673 dnl XSL_STYLE_DIR
674 dnl
675 AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
677 AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
678 glibcxx_stylesheets=no
679 if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude http://docbook.sourceforge.net/release/xsl-ns/current/xhtml-1_1/docbook.xsl - 2>/dev/null; then
680 glibcxx_stylesheets=yes
681 fi
682 AC_MSG_RESULT($glibcxx_stylesheets)
684 AC_MSG_CHECKING([for local stylesheet directory])
685 glibcxx_local_stylesheets=no
686 if test x"$glibcxx_stylesheets" = x"yes"; then
687 if test -d /usr/share/sgml/docbook/xsl-ns-stylesheets; then
688 glibcxx_local_stylesheets=yes
689 XSL_STYLE_DIR=/usr/share/sgml/docbook/xsl-ns-stylesheets
690 fi
691 if test -d /usr/share/xml/docbook/stylesheet/docbook-xsl-ns; then
692 glibcxx_local_stylesheets=yes
693 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/docbook-xsl-ns
694 fi
695 if test -d /usr/share/xml/docbook/stylesheet/nwalsh5/current; then
696 glibcxx_local_stylesheets=yes
697 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/nwalsh5/current
698 fi
699 fi
700 AC_MSG_RESULT($glibcxx_local_stylesheets)
702 if test x"$glibcxx_local_stylesheets" = x"yes"; then
703 AC_SUBST(XSL_STYLE_DIR)
704 AC_MSG_NOTICE($XSL_STYLE_DIR)
705 else
706 glibcxx_stylesheets=no
707 fi
709 # Check for epub3 dependencies.
710 AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
711 glibcxx_epub_stylesheets=no
712 if test x"$glibcxx_local_stylesheets" = x"yes"; then
713 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
714 glibcxx_epub_stylesheets=yes
715 fi
716 fi
717 AC_MSG_RESULT($glibcxx_epub_stylesheets)
718 AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
720 ])
723 dnl
724 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
725 dnl
726 dnl Substs:
727 dnl GLIBCXX_INCLUDES
728 dnl TOPLEVEL_INCLUDES
729 dnl
730 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
731 # Used for every C++ compile we perform.
732 GLIBCXX_INCLUDES="\
733 -I$glibcxx_builddir/include/$host_alias \
734 -I$glibcxx_builddir/include \
735 -I$glibcxx_srcdir/libsupc++"
737 # For Canadian crosses, pick this up too.
738 if test $CANADIAN = yes; then
739 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
740 fi
742 # Stuff in the actual top level. Currently only used by libsupc++ to
743 # get unwind* headers from the libgcc dir.
744 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
745 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
747 # Now, export this to all the little Makefiles....
748 AC_SUBST(GLIBCXX_INCLUDES)
749 AC_SUBST(TOPLEVEL_INCLUDES)
750 ])
753 dnl
754 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
755 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
756 dnl
757 dnl Substs:
758 dnl OPTIMIZE_CXXFLAGS
759 dnl WARN_FLAGS
760 dnl
761 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
762 # Optimization flags that are probably a good idea for thrill-seekers. Just
763 # uncomment the lines below and make, everything else is ready to go...
764 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
765 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
766 AC_SUBST(OPTIMIZE_CXXFLAGS)
768 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi'
769 AC_SUBST(WARN_FLAGS)
770 ])
773 dnl
774 dnl All installation directory information is determined here.
775 dnl
776 dnl Substs:
777 dnl gxx_install_dir
778 dnl glibcxx_prefixdir
779 dnl glibcxx_toolexecdir
780 dnl glibcxx_toolexeclibdir
781 dnl
782 dnl Assumes cross_compiling bits already done, and with_cross_host in
783 dnl particular.
784 dnl
785 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
786 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
787 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
788 glibcxx_toolexecdir=no
789 glibcxx_toolexeclibdir=no
790 glibcxx_prefixdir=$prefix
792 AC_MSG_CHECKING([for gxx-include-dir])
793 AC_ARG_WITH([gxx-include-dir],
794 AC_HELP_STRING([--with-gxx-include-dir=DIR],
795 [installation directory for include files]),
796 [case "$withval" in
797 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
798 no) gxx_include_dir=no ;;
799 *) gxx_include_dir=$withval ;;
800 esac],
801 [gxx_include_dir=no])
802 AC_MSG_RESULT($gxx_include_dir)
804 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
805 AC_ARG_ENABLE([version-specific-runtime-libs],
806 AC_HELP_STRING([--enable-version-specific-runtime-libs],
807 [Specify that runtime libraries should be installed in a compiler-specific directory]),
808 [case "$enableval" in
809 yes) version_specific_libs=yes ;;
810 no) version_specific_libs=no ;;
811 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
812 esac],
813 [version_specific_libs=no])
814 AC_MSG_RESULT($version_specific_libs)
816 # Default case for install directory for include files.
817 if test $version_specific_libs = no && test $gxx_include_dir = no; then
818 gxx_include_dir='include/c++/${gcc_version}'
819 if test -n "$with_cross_host" &&
820 test x"$with_cross_host" != x"no"; then
821 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
822 else
823 gxx_include_dir='${prefix}/'"$gxx_include_dir"
824 fi
825 fi
827 # Version-specific runtime libs processing.
828 if test $version_specific_libs = yes; then
829 # Need the gcc compiler version to know where to install libraries
830 # and header files if --enable-version-specific-runtime-libs option
831 # is selected. FIXME: these variables are misnamed, there are
832 # no executables installed in _toolexecdir or _toolexeclibdir.
833 if test x"$gxx_include_dir" = x"no"; then
834 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
835 fi
836 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
837 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
838 fi
840 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
841 # Install a library built with a cross compiler in tooldir, not libdir.
842 if test x"$glibcxx_toolexecdir" = x"no"; then
843 if test -n "$with_cross_host" &&
844 test x"$with_cross_host" != x"no"; then
845 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
846 glibcxx_toolexeclibdir='${toolexecdir}/lib'
847 else
848 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
849 glibcxx_toolexeclibdir='${libdir}'
850 fi
851 multi_os_directory=`$CXX -print-multi-os-directory`
852 case $multi_os_directory in
853 .) ;; # Avoid trailing /.
854 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
855 esac
856 fi
858 AC_MSG_CHECKING([for install location])
859 AC_MSG_RESULT($gxx_include_dir)
861 AC_SUBST(glibcxx_prefixdir)
862 AC_SUBST(gxx_include_dir)
863 AC_SUBST(glibcxx_toolexecdir)
864 AC_SUBST(glibcxx_toolexeclibdir)
865 ])
868 dnl
869 dnl GLIBCXX_ENABLE
870 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
871 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
872 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
873 dnl
874 dnl See manual/appendix_porting.html#appendix.porting.build_hacking for
875 dnl documentation.
876 dnl
877 m4_define([GLIBCXX_ENABLE],[dnl
878 m4_define([_g_switch],[--enable-$1])dnl
879 m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
880 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
881 m4_bmatch([$5],
882 [^permit ],
883 [[
884 case "$enableval" in
885 m4_bpatsubst([$5],[permit ])) ;;
886 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
887 dnl Idea for future: generate a URL pointing to
888 dnl "onlinedocs/configopts.html#whatever"
889 esac
890 ]],
891 [^$],
892 [[
893 case "$enableval" in
894 yes|no) ;;
895 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
896 esac
897 ]],
898 [[$5]]),
899 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
900 m4_undefine([_g_switch])dnl
901 m4_undefine([_g_help])dnl
902 ])
905 dnl
906 dnl Check for ISO/IEC 9899:1999 "C99" support.
907 dnl
908 dnl --enable-c99 defines _GLIBCXX_USE_C99
909 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
910 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
911 dnl Where DEFAULT is either `yes' or `no'.
912 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
913 dnl
914 AC_DEFUN([GLIBCXX_ENABLE_C99], [
915 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
917 if test x"$enable_c99" = x"yes"; then
919 AC_LANG_SAVE
920 AC_LANG_CPLUSPLUS
922 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
923 # undefined and fake C99 facilities - like pre-standard snprintf - may be
924 # spuriously enabled.
925 # Long term, -std=c++0x could be even better, could manage to explicitly
926 # request C99 facilities to the underlying C headers.
927 ac_save_CXXFLAGS="$CXXFLAGS"
928 CXXFLAGS="$CXXFLAGS -std=c++98"
929 ac_save_LIBS="$LIBS"
930 ac_save_gcc_no_link="$gcc_no_link"
932 if test x$gcc_no_link != xyes; then
933 # Use -fno-exceptions to that the C driver can link these tests without
934 # hitting undefined references to personality routines.
935 CXXFLAGS="$CXXFLAGS -fno-exceptions"
936 AC_CHECK_LIB(m, sin, [
937 LIBS="$LIBS -lm"
938 ], [
939 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
940 gcc_no_link=yes
941 ])
942 fi
944 # Check for the existence of <math.h> functions used if C99 is enabled.
945 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
946 AC_CACHE_VAL(glibcxx_cv_c99_math, [
947 GCC_TRY_COMPILE_OR_LINK(
948 [#include <math.h>
949 volatile double d1, d2;
950 volatile int i;],
951 [i = fpclassify(d1);
952 i = isfinite(d1);
953 i = isinf(d1);
954 i = isnan(d1);
955 i = isnormal(d1);
956 i = signbit(d1);
957 i = isgreater(d1, d2);
958 i = isgreaterequal(d1, d2);
959 i = isless(d1, d2);
960 i = islessequal(d1, d2);
961 i = islessgreater(d1, d2);
962 i = islessgreater(d1, d2);
963 i = isunordered(d1, d2);
964 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
965 ])
966 AC_MSG_RESULT($glibcxx_cv_c99_math)
967 if test x"$glibcxx_cv_c99_math" = x"yes"; then
968 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
969 [Define if C99 functions or macros in <math.h> should be imported
970 in <cmath> in namespace std.])
971 fi
973 # Check for the existence of <complex.h> complex math functions.
974 # This is necessary even though libstdc++ uses the builtin versions
975 # of these functions, because if the builtin cannot be used, a reference
976 # to the library function is emitted.
977 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
978 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
979 glibcxx_cv_c99_complex=no;
980 if test x"$ac_has_complex_h" = x"yes"; then
981 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
982 GCC_TRY_COMPILE_OR_LINK(
983 [#include <complex.h>
984 typedef __complex__ float float_type;
985 typedef __complex__ double double_type;
986 typedef __complex__ long double ld_type;
987 volatile float_type tmpf;
988 volatile double_type tmpd;
989 volatile ld_type tmpld;
990 volatile float f;
991 volatile double d;
992 volatile long double ld;],
993 [f = cabsf(tmpf);
994 f = cargf(tmpf);
995 tmpf = ccosf(tmpf);
996 tmpf = ccoshf(tmpf);
997 tmpf = cexpf(tmpf);
998 tmpf = clogf(tmpf);
999 tmpf = csinf(tmpf);
1000 tmpf = csinhf(tmpf);
1001 tmpf = csqrtf(tmpf);
1002 tmpf = ctanf(tmpf);
1003 tmpf = ctanhf(tmpf);
1004 tmpf = cpowf(tmpf, tmpf);
1005 tmpf = cprojf(tmpf);
1006 d = cabs(tmpd);
1007 d = carg(tmpd);
1008 tmpd = ccos(tmpd);
1009 tmpd = ccosh(tmpd);
1010 tmpd = cexp(tmpd);
1011 tmpd = clog(tmpd);
1012 tmpd = csin(tmpd);
1013 tmpd = csinh(tmpd);
1014 tmpd = csqrt(tmpd);
1015 tmpd = ctan(tmpd);
1016 tmpd = ctanh(tmpd);
1017 tmpd = cpow(tmpd, tmpd);
1018 tmpd = cproj(tmpd);
1019 ld = cabsl(tmpld);
1020 ld = cargl(tmpld);
1021 tmpld = ccosl(tmpld);
1022 tmpld = ccoshl(tmpld);
1023 tmpld = cexpl(tmpld);
1024 tmpld = clogl(tmpld);
1025 tmpld = csinl(tmpld);
1026 tmpld = csinhl(tmpld);
1027 tmpld = csqrtl(tmpld);
1028 tmpld = ctanl(tmpld);
1029 tmpld = ctanhl(tmpld);
1030 tmpld = cpowl(tmpld, tmpld);
1031 tmpld = cprojl(tmpld);
1032 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
1033 fi
1034 AC_MSG_RESULT($glibcxx_cv_c99_complex)
1035 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
1036 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
1037 [Define if C99 functions in <complex.h> should be used in
1038 <complex>. Using compiler builtins for these functions requires
1039 corresponding C99 library functions to be present.])
1040 fi
1042 # Check for the existence in <stdio.h> of vscanf, et. al.
1043 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1044 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
1045 GCC_TRY_COMPILE_OR_LINK(
1046 [#include <stdio.h>
1047 #include <stdarg.h>
1048 void foo(char* fmt, ...)
1049 {
1050 va_list args; va_start(args, fmt);
1051 vfscanf(stderr, "%i", args);
1052 vscanf("%i", args);
1053 vsnprintf(fmt, 0, "%i", args);
1054 vsscanf(fmt, "%i", args);
1055 snprintf(fmt, 0, "%i");
1056 }], [],
1057 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
1058 ])
1059 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
1061 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1062 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1063 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
1064 GCC_TRY_COMPILE_OR_LINK(
1065 [#include <stdlib.h>
1066 volatile float f;
1067 volatile long double ld;
1068 volatile unsigned long long ll;
1069 lldiv_t mydivt;],
1070 [char* tmp;
1071 f = strtof("gnu", &tmp);
1072 ld = strtold("gnu", &tmp);
1073 ll = strtoll("gnu", &tmp, 10);
1074 ll = strtoull("gnu", &tmp, 10);
1075 ll = llabs(10);
1076 mydivt = lldiv(10,1);
1077 ll = mydivt.quot;
1078 ll = mydivt.rem;
1079 ll = atoll("10");
1080 _Exit(0);
1081 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
1082 ])
1083 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
1085 # Check for the existence in <wchar.h> of wcstold, etc.
1086 glibcxx_cv_c99_wchar=no;
1087 if test x"$ac_has_wchar_h" = xyes &&
1088 test x"$ac_has_wctype_h" = xyes; then
1089 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1090 AC_TRY_COMPILE([#include <wchar.h>
1091 namespace test
1092 {
1093 using ::wcstold;
1094 using ::wcstoll;
1095 using ::wcstoull;
1096 }
1097 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
1099 # Checks for wide character functions that may not be present.
1100 # Injection of these is wrapped with guard macros.
1101 # NB: only put functions here, instead of immediately above, if
1102 # absolutely necessary.
1103 AC_TRY_COMPILE([#include <wchar.h>
1104 namespace test { using ::vfwscanf; } ], [],
1105 [AC_DEFINE(HAVE_VFWSCANF,1,
1106 [Defined if vfwscanf exists.])],[])
1108 AC_TRY_COMPILE([#include <wchar.h>
1109 namespace test { using ::vswscanf; } ], [],
1110 [AC_DEFINE(HAVE_VSWSCANF,1,
1111 [Defined if vswscanf exists.])],[])
1113 AC_TRY_COMPILE([#include <wchar.h>
1114 namespace test { using ::vwscanf; } ], [],
1115 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1117 AC_TRY_COMPILE([#include <wchar.h>
1118 namespace test { using ::wcstof; } ], [],
1119 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1121 AC_TRY_COMPILE([#include <wctype.h>],
1122 [ wint_t t; int i = iswblank(t);],
1123 [AC_DEFINE(HAVE_ISWBLANK,1,
1124 [Defined if iswblank exists.])],[])
1126 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
1127 fi
1129 # Option parsed, now set things appropriately.
1130 if test x"$glibcxx_cv_c99_math" = x"no" ||
1131 test x"$glibcxx_cv_c99_complex" = x"no" ||
1132 test x"$glibcxx_cv_c99_stdio" = x"no" ||
1133 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
1134 test x"$glibcxx_cv_c99_wchar" = x"no"; then
1135 enable_c99=no;
1136 else
1137 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1138 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1139 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1140 fi
1142 gcc_no_link="$ac_save_gcc_no_link"
1143 LIBS="$ac_save_LIBS"
1144 CXXFLAGS="$ac_save_CXXFLAGS"
1145 AC_LANG_RESTORE
1146 fi
1148 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1149 AC_MSG_RESULT($enable_c99)
1150 ])
1153 dnl
1154 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1155 dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1156 dnl in the C++11 standard.
1157 dnl
1158 dnl --enable-libstdcxx-time
1159 dnl --enable-libstdcxx-time=yes
1160 dnl checks for the availability of monotonic and realtime clocks,
1161 dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
1162 dnl links in the latter.
1163 dnl --enable-libstdcxx-time=rt
1164 dnl also searches (and, if needed, links) librt. Note that this is
1165 dnl not always desirable because, in glibc 2.16 and earlier, for
1166 dnl example, in turn it triggers the linking of libpthread too,
1167 dnl which activates locking,
1168 dnl a large overhead for single-thread programs.
1169 dnl --enable-libstdcxx-time=no
1170 dnl --disable-libstdcxx-time
1171 dnl disables the checks completely
1172 dnl
1173 dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1174 dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1175 dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1176 dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1177 dnl
1178 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1180 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
1181 [use KIND for check type],
1182 [permit yes|no|rt])
1184 AC_LANG_SAVE
1185 AC_LANG_CPLUSPLUS
1186 ac_save_CXXFLAGS="$CXXFLAGS"
1187 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1188 ac_save_LIBS="$LIBS"
1190 ac_has_clock_monotonic=no
1191 ac_has_clock_realtime=no
1192 ac_has_nanosleep=no
1193 ac_has_sched_yield=no
1195 if test x"$enable_libstdcxx_time" = x"auto"; then
1197 case "${target_os}" in
1198 cygwin*)
1199 ac_has_nanosleep=yes
1200 ;;
1201 darwin*)
1202 ac_has_nanosleep=yes
1203 ac_has_sched_yield=yes
1204 ;;
1205 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
1206 AC_MSG_CHECKING([for at least GNU libc 2.17])
1207 AC_TRY_COMPILE(
1208 [#include <features.h>],
1209 [
1210 #if ! __GLIBC_PREREQ(2, 17)
1211 #error
1212 #endif
1213 ],
1214 [glibcxx_glibc217=yes], [glibcxx_glibc217=no])
1215 AC_MSG_RESULT($glibcxx_glibc217)
1217 if test x"$glibcxx_glibc217" = x"yes"; then
1218 ac_has_clock_monotonic=yes
1219 ac_has_clock_realtime=yes
1220 fi
1221 ac_has_nanosleep=yes
1222 ac_has_sched_yield=yes
1223 ;;
1224 freebsd*|netbsd*|dragonfly*)
1225 ac_has_clock_monotonic=yes
1226 ac_has_clock_realtime=yes
1227 ac_has_nanosleep=yes
1228 ac_has_sched_yield=yes
1229 ;;
1230 openbsd*)
1231 ac_has_clock_monotonic=yes
1232 ac_has_clock_realtime=yes
1233 ac_has_nanosleep=yes
1234 ;;
1235 solaris*)
1236 GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt"
1237 ac_has_clock_monotonic=yes
1238 ac_has_clock_realtime=yes
1239 ac_has_nanosleep=yes
1240 ac_has_sched_yield=yes
1241 ;;
1242 esac
1244 elif test x"$enable_libstdcxx_time" != x"no"; then
1246 if test x"$enable_libstdcxx_time" = x"rt"; then
1247 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1248 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1249 else
1250 AC_SEARCH_LIBS(clock_gettime, [posix4])
1251 AC_SEARCH_LIBS(nanosleep, [posix4])
1252 fi
1254 case "$ac_cv_search_clock_gettime" in
1255 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1256 ;;
1257 esac
1258 case "$ac_cv_search_nanosleep" in
1259 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1260 ;;
1261 esac
1263 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1265 case "$ac_cv_search_sched_yield" in
1266 -lposix4*)
1267 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1268 ac_has_sched_yield=yes
1269 ;;
1270 -lrt*)
1271 if test x"$enable_libstdcxx_time" = x"rt"; then
1272 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1273 ac_has_sched_yield=yes
1274 fi
1275 ;;
1276 *)
1277 ac_has_sched_yield=yes
1278 ;;
1279 esac
1281 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1283 if test x"$ac_has_unistd_h" = x"yes"; then
1284 AC_MSG_CHECKING([for monotonic clock])
1285 AC_TRY_LINK(
1286 [#include <unistd.h>
1287 #include <time.h>
1288 ],
1289 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1290 timespec tp;
1291 #endif
1292 clock_gettime(CLOCK_MONOTONIC, &tp);
1293 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1295 AC_MSG_RESULT($ac_has_clock_monotonic)
1297 AC_MSG_CHECKING([for realtime clock])
1298 AC_TRY_LINK(
1299 [#include <unistd.h>
1300 #include <time.h>
1301 ],
1302 [#if _POSIX_TIMERS > 0
1303 timespec tp;
1304 #endif
1305 clock_gettime(CLOCK_REALTIME, &tp);
1306 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1308 AC_MSG_RESULT($ac_has_clock_realtime)
1310 AC_MSG_CHECKING([for nanosleep])
1311 AC_TRY_LINK(
1312 [#include <unistd.h>
1313 #include <time.h>
1314 ],
1315 [#if _POSIX_TIMERS > 0
1316 timespec tp;
1317 #endif
1318 nanosleep(&tp, 0);
1319 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1321 AC_MSG_RESULT($ac_has_nanosleep)
1322 fi
1323 fi
1325 if test x"$ac_has_clock_monotonic" != x"yes"; then
1326 case ${target_os} in
1327 linux*)
1328 AC_MSG_CHECKING([for clock_gettime syscall])
1329 AC_TRY_COMPILE(
1330 [#include <unistd.h>
1331 #include <time.h>
1332 #include <sys/syscall.h>
1333 ],
1334 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1335 timespec tp;
1336 #endif
1337 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
1338 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
1339 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no])
1340 AC_MSG_RESULT($ac_has_clock_monotonic_syscall)
1341 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then
1342 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
1343 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ])
1344 ac_has_clock_monotonic=yes
1345 ac_has_clock_realtime=yes
1346 fi;;
1347 esac
1348 fi
1350 if test x"$ac_has_clock_monotonic" = x"yes"; then
1351 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1352 [ Defined if clock_gettime has monotonic clock support. ])
1353 fi
1355 if test x"$ac_has_clock_realtime" = x"yes"; then
1356 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1357 [ Defined if clock_gettime has realtime clock support. ])
1358 fi
1360 if test x"$ac_has_sched_yield" = x"yes"; then
1361 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1362 [ Defined if sched_yield is available. ])
1363 fi
1365 if test x"$ac_has_nanosleep" = x"yes"; then
1366 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1367 [ Defined if nanosleep is available. ])
1368 else
1369 AC_MSG_CHECKING([for sleep])
1370 AC_TRY_COMPILE([#include <unistd.h>],
1371 [sleep(1)],
1372 [ac_has_sleep=yes],[ac_has_sleep=no])
1373 if test x"$ac_has_sleep" = x"yes"; then
1374 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1375 fi
1376 AC_MSG_RESULT($ac_has_sleep)
1377 AC_MSG_CHECKING([for usleep])
1378 AC_TRY_COMPILE([#include <unistd.h>],
1379 [sleep(1);
1380 usleep(100);],
1381 [ac_has_usleep=yes],[ac_has_usleep=no])
1382 if test x"$ac_has_usleep" = x"yes"; then
1383 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1384 fi
1385 AC_MSG_RESULT($ac_has_usleep)
1386 fi
1388 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1389 AC_MSG_CHECKING([for Sleep])
1390 AC_TRY_COMPILE([#include <windows.h>],
1391 [Sleep(1)],
1392 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1393 if test x"$ac_has_win32_sleep" = x"yes"; then
1394 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1395 fi
1396 AC_MSG_RESULT($ac_has_win32_sleep)
1397 fi
1399 AC_SUBST(GLIBCXX_LIBS)
1401 CXXFLAGS="$ac_save_CXXFLAGS"
1402 LIBS="$ac_save_LIBS"
1403 AC_LANG_RESTORE
1404 ])
1406 dnl
1407 dnl Check for gettimeofday, used in the implementation of 20.11.7
1408 dnl [time.clock] in the C++11 standard.
1409 dnl
1410 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1412 AC_MSG_CHECKING([for gettimeofday])
1414 AC_LANG_SAVE
1415 AC_LANG_CPLUSPLUS
1416 ac_save_CXXFLAGS="$CXXFLAGS"
1417 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1419 ac_has_gettimeofday=no;
1420 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1421 if test x"$ac_has_sys_time_h" = x"yes"; then
1422 AC_MSG_CHECKING([for gettimeofday])
1423 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1424 [timeval tv; gettimeofday(&tv, 0);],
1425 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1427 AC_MSG_RESULT($ac_has_gettimeofday)
1428 fi
1430 if test x"$ac_has_gettimeofday" = x"yes"; then
1431 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1432 [ Defined if gettimeofday is available. ])
1433 fi
1435 CXXFLAGS="$ac_save_CXXFLAGS"
1436 AC_LANG_RESTORE
1437 ])
1439 dnl
1440 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1441 dnl facilities in Chapter 8, "C compatibility".
1442 dnl
1443 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1445 AC_LANG_SAVE
1446 AC_LANG_CPLUSPLUS
1448 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1449 # undefined and fake C99 facilities may be spuriously enabled.
1450 ac_save_CXXFLAGS="$CXXFLAGS"
1451 CXXFLAGS="$CXXFLAGS -std=c++98"
1453 # Check for the existence of <complex.h> complex math functions used
1454 # by tr1/complex.
1455 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1456 ac_c99_complex_tr1=no;
1457 if test x"$ac_has_complex_h" = x"yes"; then
1458 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1459 AC_TRY_COMPILE([#include <complex.h>],
1460 [typedef __complex__ float float_type; float_type tmpf;
1461 cacosf(tmpf);
1462 casinf(tmpf);
1463 catanf(tmpf);
1464 cacoshf(tmpf);
1465 casinhf(tmpf);
1466 catanhf(tmpf);
1467 typedef __complex__ double double_type; double_type tmpd;
1468 cacos(tmpd);
1469 casin(tmpd);
1470 catan(tmpd);
1471 cacosh(tmpd);
1472 casinh(tmpd);
1473 catanh(tmpd);
1474 typedef __complex__ long double ld_type; ld_type tmpld;
1475 cacosl(tmpld);
1476 casinl(tmpld);
1477 catanl(tmpld);
1478 cacoshl(tmpld);
1479 casinhl(tmpld);
1480 catanhl(tmpld);
1481 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1482 fi
1483 AC_MSG_RESULT($ac_c99_complex_tr1)
1484 if test x"$ac_c99_complex_tr1" = x"yes"; then
1485 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1486 [Define if C99 functions in <complex.h> should be used in
1487 <tr1/complex>. Using compiler builtins for these functions
1488 requires corresponding C99 library functions to be present.])
1489 fi
1491 # Check for the existence of <ctype.h> functions.
1492 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1493 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1494 AC_TRY_COMPILE([#include <ctype.h>],
1495 [int ch;
1496 int ret;
1497 ret = isblank(ch);
1498 ],[glibcxx_cv_c99_ctype_tr1=yes],
1499 [glibcxx_cv_c99_ctype_tr1=no])
1500 ])
1501 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1502 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1503 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1504 [Define if C99 functions in <ctype.h> should be imported in
1505 <tr1/cctype> in namespace std::tr1.])
1506 fi
1508 # Check for the existence of <fenv.h> functions.
1509 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1510 ac_c99_fenv_tr1=no;
1511 if test x"$ac_has_fenv_h" = x"yes"; then
1512 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1513 AC_TRY_COMPILE([#include <fenv.h>],
1514 [int except, mode;
1515 fexcept_t* pflag;
1516 fenv_t* penv;
1517 int ret;
1518 ret = feclearexcept(except);
1519 ret = fegetexceptflag(pflag, except);
1520 ret = feraiseexcept(except);
1521 ret = fesetexceptflag(pflag, except);
1522 ret = fetestexcept(except);
1523 ret = fegetround();
1524 ret = fesetround(mode);
1525 ret = fegetenv(penv);
1526 ret = feholdexcept(penv);
1527 ret = fesetenv(penv);
1528 ret = feupdateenv(penv);
1529 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1530 fi
1531 AC_MSG_RESULT($ac_c99_fenv_tr1)
1532 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1533 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1534 [Define if C99 functions in <fenv.h> should be imported in
1535 <tr1/cfenv> in namespace std::tr1.])
1536 fi
1538 # Check for the existence of <stdint.h> types.
1539 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1540 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1541 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1542 #define __STDC_CONSTANT_MACROS
1543 #include <stdint.h>],
1544 [typedef int8_t my_int8_t;
1545 my_int8_t i8 = INT8_MIN;
1546 i8 = INT8_MAX;
1547 typedef int16_t my_int16_t;
1548 my_int16_t i16 = INT16_MIN;
1549 i16 = INT16_MAX;
1550 typedef int32_t my_int32_t;
1551 my_int32_t i32 = INT32_MIN;
1552 i32 = INT32_MAX;
1553 typedef int64_t my_int64_t;
1554 my_int64_t i64 = INT64_MIN;
1555 i64 = INT64_MAX;
1556 typedef int_fast8_t my_int_fast8_t;
1557 my_int_fast8_t if8 = INT_FAST8_MIN;
1558 if8 = INT_FAST8_MAX;
1559 typedef int_fast16_t my_int_fast16_t;
1560 my_int_fast16_t if16 = INT_FAST16_MIN;
1561 if16 = INT_FAST16_MAX;
1562 typedef int_fast32_t my_int_fast32_t;
1563 my_int_fast32_t if32 = INT_FAST32_MIN;
1564 if32 = INT_FAST32_MAX;
1565 typedef int_fast64_t my_int_fast64_t;
1566 my_int_fast64_t if64 = INT_FAST64_MIN;
1567 if64 = INT_FAST64_MAX;
1568 typedef int_least8_t my_int_least8_t;
1569 my_int_least8_t il8 = INT_LEAST8_MIN;
1570 il8 = INT_LEAST8_MAX;
1571 typedef int_least16_t my_int_least16_t;
1572 my_int_least16_t il16 = INT_LEAST16_MIN;
1573 il16 = INT_LEAST16_MAX;
1574 typedef int_least32_t my_int_least32_t;
1575 my_int_least32_t il32 = INT_LEAST32_MIN;
1576 il32 = INT_LEAST32_MAX;
1577 typedef int_least64_t my_int_least64_t;
1578 my_int_least64_t il64 = INT_LEAST64_MIN;
1579 il64 = INT_LEAST64_MAX;
1580 typedef intmax_t my_intmax_t;
1581 my_intmax_t im = INTMAX_MAX;
1582 im = INTMAX_MIN;
1583 typedef intptr_t my_intptr_t;
1584 my_intptr_t ip = INTPTR_MAX;
1585 ip = INTPTR_MIN;
1586 typedef uint8_t my_uint8_t;
1587 my_uint8_t ui8 = UINT8_MAX;
1588 ui8 = UINT8_MAX;
1589 typedef uint16_t my_uint16_t;
1590 my_uint16_t ui16 = UINT16_MAX;
1591 ui16 = UINT16_MAX;
1592 typedef uint32_t my_uint32_t;
1593 my_uint32_t ui32 = UINT32_MAX;
1594 ui32 = UINT32_MAX;
1595 typedef uint64_t my_uint64_t;
1596 my_uint64_t ui64 = UINT64_MAX;
1597 ui64 = UINT64_MAX;
1598 typedef uint_fast8_t my_uint_fast8_t;
1599 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1600 uif8 = UINT_FAST8_MAX;
1601 typedef uint_fast16_t my_uint_fast16_t;
1602 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1603 uif16 = UINT_FAST16_MAX;
1604 typedef uint_fast32_t my_uint_fast32_t;
1605 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1606 uif32 = UINT_FAST32_MAX;
1607 typedef uint_fast64_t my_uint_fast64_t;
1608 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1609 uif64 = UINT_FAST64_MAX;
1610 typedef uint_least8_t my_uint_least8_t;
1611 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1612 uil8 = UINT_LEAST8_MAX;
1613 typedef uint_least16_t my_uint_least16_t;
1614 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1615 uil16 = UINT_LEAST16_MAX;
1616 typedef uint_least32_t my_uint_least32_t;
1617 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1618 uil32 = UINT_LEAST32_MAX;
1619 typedef uint_least64_t my_uint_least64_t;
1620 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1621 uil64 = UINT_LEAST64_MAX;
1622 typedef uintmax_t my_uintmax_t;
1623 my_uintmax_t uim = UINTMAX_MAX;
1624 uim = UINTMAX_MAX;
1625 typedef uintptr_t my_uintptr_t;
1626 my_uintptr_t uip = UINTPTR_MAX;
1627 uip = UINTPTR_MAX;
1628 ],[glibcxx_cv_c99_stdint_tr1=yes],
1629 [glibcxx_cv_c99_stdint_tr1=no])
1630 ])
1631 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1632 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1633 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1634 [Define if C99 types in <stdint.h> should be imported in
1635 <tr1/cstdint> in namespace std::tr1.])
1636 fi
1638 # Check for the existence of <math.h> functions.
1639 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1640 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1641 AC_TRY_COMPILE([#include <math.h>],
1642 [typedef double_t my_double_t;
1643 typedef float_t my_float_t;
1644 acosh(0.0);
1645 acoshf(0.0f);
1646 acoshl(0.0l);
1647 asinh(0.0);
1648 asinhf(0.0f);
1649 asinhl(0.0l);
1650 atanh(0.0);
1651 atanhf(0.0f);
1652 atanhl(0.0l);
1653 cbrt(0.0);
1654 cbrtf(0.0f);
1655 cbrtl(0.0l);
1656 copysign(0.0, 0.0);
1657 copysignf(0.0f, 0.0f);
1658 copysignl(0.0l, 0.0l);
1659 erf(0.0);
1660 erff(0.0f);
1661 erfl(0.0l);
1662 erfc(0.0);
1663 erfcf(0.0f);
1664 erfcl(0.0l);
1665 exp2(0.0);
1666 exp2f(0.0f);
1667 exp2l(0.0l);
1668 expm1(0.0);
1669 expm1f(0.0f);
1670 expm1l(0.0l);
1671 fdim(0.0, 0.0);
1672 fdimf(0.0f, 0.0f);
1673 fdiml(0.0l, 0.0l);
1674 fma(0.0, 0.0, 0.0);
1675 fmaf(0.0f, 0.0f, 0.0f);
1676 fmal(0.0l, 0.0l, 0.0l);
1677 fmax(0.0, 0.0);
1678 fmaxf(0.0f, 0.0f);
1679 fmaxl(0.0l, 0.0l);
1680 fmin(0.0, 0.0);
1681 fminf(0.0f, 0.0f);
1682 fminl(0.0l, 0.0l);
1683 hypot(0.0, 0.0);
1684 hypotf(0.0f, 0.0f);
1685 hypotl(0.0l, 0.0l);
1686 ilogb(0.0);
1687 ilogbf(0.0f);
1688 ilogbl(0.0l);
1689 lgamma(0.0);
1690 lgammaf(0.0f);
1691 lgammal(0.0l);
1692 llrint(0.0);
1693 llrintf(0.0f);
1694 llrintl(0.0l);
1695 llround(0.0);
1696 llroundf(0.0f);
1697 llroundl(0.0l);
1698 log1p(0.0);
1699 log1pf(0.0f);
1700 log1pl(0.0l);
1701 log2(0.0);
1702 log2f(0.0f);
1703 log2l(0.0l);
1704 logb(0.0);
1705 logbf(0.0f);
1706 logbl(0.0l);
1707 lrint(0.0);
1708 lrintf(0.0f);
1709 lrintl(0.0l);
1710 lround(0.0);
1711 lroundf(0.0f);
1712 lroundl(0.0l);
1713 nan(0);
1714 nanf(0);
1715 nanl(0);
1716 nearbyint(0.0);
1717 nearbyintf(0.0f);
1718 nearbyintl(0.0l);
1719 nextafter(0.0, 0.0);
1720 nextafterf(0.0f, 0.0f);
1721 nextafterl(0.0l, 0.0l);
1722 nexttoward(0.0, 0.0);
1723 nexttowardf(0.0f, 0.0f);
1724 nexttowardl(0.0l, 0.0l);
1725 remainder(0.0, 0.0);
1726 remainderf(0.0f, 0.0f);
1727 remainderl(0.0l, 0.0l);
1728 remquo(0.0, 0.0, 0);
1729 remquof(0.0f, 0.0f, 0);
1730 remquol(0.0l, 0.0l, 0);
1731 rint(0.0);
1732 rintf(0.0f);
1733 rintl(0.0l);
1734 round(0.0);
1735 roundf(0.0f);
1736 roundl(0.0l);
1737 scalbln(0.0, 0l);
1738 scalblnf(0.0f, 0l);
1739 scalblnl(0.0l, 0l);
1740 scalbn(0.0, 0);
1741 scalbnf(0.0f, 0);
1742 scalbnl(0.0l, 0);
1743 tgamma(0.0);
1744 tgammaf(0.0f);
1745 tgammal(0.0l);
1746 trunc(0.0);
1747 truncf(0.0f);
1748 truncl(0.0l);
1749 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1750 ])
1751 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1752 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1753 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1754 [Define if C99 functions or macros in <math.h> should be imported
1755 in <tr1/cmath> in namespace std::tr1.])
1756 fi
1758 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1759 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1760 ac_c99_inttypes_tr1=no;
1761 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1762 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1763 AC_TRY_COMPILE([#include <inttypes.h>],
1764 [intmax_t i, numer, denom, base;
1765 const char* s;
1766 char** endptr;
1767 intmax_t ret = imaxabs(i);
1768 imaxdiv_t dret = imaxdiv(numer, denom);
1769 ret = strtoimax(s, endptr, base);
1770 uintmax_t uret = strtoumax(s, endptr, base);
1771 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1772 fi
1773 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1774 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1775 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1776 [Define if C99 functions in <inttypes.h> should be imported in
1777 <tr1/cinttypes> in namespace std::tr1.])
1778 fi
1780 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
1781 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1782 ac_c99_inttypes_wchar_t_tr1=no;
1783 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1784 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1785 AC_TRY_COMPILE([#include <inttypes.h>],
1786 [intmax_t base;
1787 const wchar_t* s;
1788 wchar_t** endptr;
1789 intmax_t ret = wcstoimax(s, endptr, base);
1790 uintmax_t uret = wcstoumax(s, endptr, base);
1791 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1792 [ac_c99_inttypes_wchar_t_tr1=no])
1793 fi
1794 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1795 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
1796 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
1797 [Define if wchar_t C99 functions in <inttypes.h> should be
1798 imported in <tr1/cinttypes> in namespace std::tr1.])
1799 fi
1801 # Check for the existence of the <stdbool.h> header.
1802 AC_CHECK_HEADERS(stdbool.h)
1804 # Check for the existence of the <stdalign.h> header.
1805 AC_CHECK_HEADERS(stdalign.h)
1807 CXXFLAGS="$ac_save_CXXFLAGS"
1808 AC_LANG_RESTORE
1809 ])
1811 dnl
1812 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
1813 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1814 dnl
1815 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1817 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
1818 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1819 if test -r /dev/random && test -r /dev/urandom; then
1820 ## For MSys environment the test above is detect as false-positive
1821 ## on mingw-targets. So disable it explicit for them.
1822 case ${target_os} in
1823 *mingw*) glibcxx_cv_random_tr1=no ;;
1824 *) glibcxx_cv_random_tr1=yes ;;
1825 esac
1826 else
1827 glibcxx_cv_random_tr1=no;
1828 fi
1829 ])
1830 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1832 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1833 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1834 [Define if /dev/random and /dev/urandom are available for
1835 the random_device of TR1 (Chapter 5.1).])
1836 fi
1838 ])
1840 dnl
1841 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
1842 dnl
1843 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
1845 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
1846 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
1847 [#include <stdio.h>],
1848 [AC_MSG_ERROR([computing EOF failed])])
1849 ])
1850 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
1851 [Define to the value of the EOF integer constant.])
1853 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
1854 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
1855 [#include <stdio.h>],
1856 [AC_MSG_ERROR([computing SEEK_CUR failed])])
1857 ])
1858 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
1859 [Define to the value of the SEEK_CUR integer constant.])
1861 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
1862 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
1863 [#include <stdio.h>],
1864 [AC_MSG_ERROR([computing SEEK_END failed])])
1865 ])
1866 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
1867 [Define to the value of the SEEK_END integer constant.])
1868 ])
1870 dnl
1871 dnl Check whether required C++ overloads are present in <stdio.h>.
1872 dnl
1873 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
1875 AC_LANG_SAVE
1876 AC_LANG_CPLUSPLUS
1878 AC_MSG_CHECKING([for gets declaration])
1879 AC_CACHE_VAL(glibcxx_cv_gets, [
1880 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
1881 [#include <stdio.h>
1882 namespace test
1883 {
1884 using ::gets;
1885 }
1886 ])],
1887 [glibcxx_cv_gets=yes],
1888 [glibcxx_cv_gets=no]
1889 )])
1891 if test $glibcxx_cv_gets = yes; then
1892 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h>.])
1893 fi
1894 AC_MSG_RESULT($glibcxx_cv_gets)
1896 AC_LANG_RESTORE
1897 ])
1899 dnl
1900 dnl Check whether macros, etc are present for <system_error>
1901 dnl
1902 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1904 m4_pushdef([n_syserr], [1])dnl
1905 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1906 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1907 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
1908 ECHILD, ENOSPC, EPERM,
1909 ETIMEDOUT, EWOULDBLOCK],
1910 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1911 AC_MSG_CHECKING([for syserr])
1912 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1913 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1914 [int i = syserr;])],
1915 [glibcxx_cv_system_error[]n_syserr=yes],
1916 [glibcxx_cv_system_error[]n_syserr=no])
1917 ])
1918 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1919 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1920 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1921 fi
1922 m4_define([n_syserr], m4_incr(n_syserr))dnl
1923 m4_popdef([SYSERR])dnl
1924 ])
1925 m4_popdef([n_syserr])dnl
1926 ])
1928 dnl
1929 dnl Check for what type of C headers to use.
1930 dnl
1931 dnl --enable-cheaders= [does stuff].
1932 dnl --disable-cheaders [does not do anything, really].
1933 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1934 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1935 dnl
1936 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1937 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
1938 [construct "C" headers for g++], [permit c|c_std|c_global])
1939 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1941 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1943 # Allow overrides to configure.host here.
1944 if test $enable_cheaders = c_global; then
1945 c_compatibility=yes
1946 fi
1948 AC_SUBST(C_INCLUDE_DIR)
1949 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1950 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1951 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1952 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1953 ])
1956 dnl
1957 dnl Check for which locale library to use. The choice is mapped to
1958 dnl a subdirectory of config/locale.
1959 dnl
1960 dnl Default is generic.
1961 dnl
1962 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1963 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
1964 [use MODEL for target locale package],
1965 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
1967 # Deal with gettext issues. Default to not using it (=no) until we detect
1968 # support for it later. Let the user turn it off via --e/d, but let that
1969 # default to on for easier handling.
1970 USE_NLS=no
1971 AC_ARG_ENABLE(nls,
1972 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1973 [],
1974 [enable_nls=yes])
1976 # Either a known package, or "auto"
1977 if test $enable_clocale = no || test $enable_clocale = yes; then
1978 enable_clocale=auto
1979 fi
1980 enable_clocale_flag=$enable_clocale
1982 # Probe for locale model to use if none specified.
1983 # Default to "generic".
1984 if test $enable_clocale_flag = auto; then
1985 case ${target_os} in
1986 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1987 enable_clocale_flag=gnu
1988 ;;
1989 darwin* | freebsd*)
1990 enable_clocale_flag=darwin
1991 ;;
1992 dragonfly*)
1993 enable_clocale_flag=dragonfly
1994 ;;
1995 openbsd*)
1996 enable_clocale_flag=newlib
1997 ;;
1998 *)
1999 if test x"$with_newlib" = x"yes"; then
2000 enable_clocale_flag=newlib
2001 else
2002 enable_clocale_flag=generic
2003 fi
2004 ;;
2005 esac
2006 fi
2008 # Sanity check model, and test for special functionality.
2009 if test $enable_clocale_flag = gnu; then
2010 AC_EGREP_CPP([_GLIBCXX_ok], [
2011 #include <features.h>
2012 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
2013 _GLIBCXX_ok
2014 #endif
2015 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2017 # Set it to scream when it hurts.
2018 ac_save_CFLAGS="$CFLAGS"
2019 CFLAGS="-Wimplicit-function-declaration -Werror"
2021 # Use strxfrm_l if available.
2022 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2023 #include <string.h>
2024 #include <locale.h>],
2025 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2026 AC_DEFINE(HAVE_STRXFRM_L, 1,
2027 [Define if strxfrm_l is available in <string.h>.]),)
2029 # Use strerror_l if available.
2030 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2031 #include <string.h>
2032 #include <locale.h>],
2033 [__locale_t loc; strerror_l(5, loc);],
2034 AC_DEFINE(HAVE_STRERROR_L, 1,
2035 [Define if strerror_l is available in <string.h>.]),)
2037 CFLAGS="$ac_save_CFLAGS"
2038 fi
2040 # Perhaps use strerror_r if available, and strerror_l isn't.
2041 ac_save_CFLAGS="$CFLAGS"
2042 CFLAGS="-Wimplicit-function-declaration -Werror"
2043 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2044 #include <string.h>
2045 #include <locale.h>],
2046 [char s[128]; strerror_r(5, s, 128);],
2047 AC_DEFINE(HAVE_STRERROR_R, 1,
2048 [Define if strerror_r is available in <string.h>.]),)
2049 CFLAGS="$ac_save_CFLAGS"
2051 # Set configure bits for specified locale package
2052 AC_MSG_CHECKING([for C locale to use])
2053 case ${enable_clocale_flag} in
2054 generic)
2055 AC_MSG_RESULT(generic)
2057 CLOCALE_H=config/locale/generic/c_locale.h
2058 CLOCALE_CC=config/locale/generic/c_locale.cc
2059 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2060 CCOLLATE_CC=config/locale/generic/collate_members.cc
2061 CCTYPE_CC=config/locale/generic/ctype_members.cc
2062 CMESSAGES_H=config/locale/generic/messages_members.h
2063 CMESSAGES_CC=config/locale/generic/messages_members.cc
2064 CMONEY_CC=config/locale/generic/monetary_members.cc
2065 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2066 CTIME_H=config/locale/generic/time_members.h
2067 CTIME_CC=config/locale/generic/time_members.cc
2068 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2069 ;;
2070 darwin)
2071 AC_MSG_RESULT(darwin or freebsd)
2073 CLOCALE_H=config/locale/generic/c_locale.h
2074 CLOCALE_CC=config/locale/generic/c_locale.cc
2075 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2076 CCOLLATE_CC=config/locale/generic/collate_members.cc
2077 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2078 CMESSAGES_H=config/locale/generic/messages_members.h
2079 CMESSAGES_CC=config/locale/generic/messages_members.cc
2080 CMONEY_CC=config/locale/generic/monetary_members.cc
2081 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2082 CTIME_H=config/locale/generic/time_members.h
2083 CTIME_CC=config/locale/generic/time_members.cc
2084 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2085 ;;
2087 dragonfly)
2088 AC_MSG_RESULT(dragonfly)
2090 CLOCALE_H=config/locale/generic/c_locale.h
2091 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
2092 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2093 CCOLLATE_CC=config/locale/generic/collate_members.cc
2094 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2095 CMESSAGES_H=config/locale/generic/messages_members.h
2096 CMESSAGES_CC=config/locale/generic/messages_members.cc
2097 CMONEY_CC=config/locale/generic/monetary_members.cc
2098 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2099 CTIME_H=config/locale/generic/time_members.h
2100 CTIME_CC=config/locale/generic/time_members.cc
2101 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2102 ;;
2104 gnu)
2105 AC_MSG_RESULT(gnu)
2107 # Declare intention to use gettext, and add support for specific
2108 # languages.
2109 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2110 ALL_LINGUAS="de fr"
2112 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2113 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2114 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2115 USE_NLS=yes
2116 fi
2117 # Export the build objects.
2118 for ling in $ALL_LINGUAS; do \
2119 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2120 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2121 done
2122 AC_SUBST(glibcxx_MOFILES)
2123 AC_SUBST(glibcxx_POFILES)
2125 CLOCALE_H=config/locale/gnu/c_locale.h
2126 CLOCALE_CC=config/locale/gnu/c_locale.cc
2127 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2128 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2129 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2130 CMESSAGES_H=config/locale/gnu/messages_members.h
2131 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2132 CMONEY_CC=config/locale/gnu/monetary_members.cc
2133 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2134 CTIME_H=config/locale/gnu/time_members.h
2135 CTIME_CC=config/locale/gnu/time_members.cc
2136 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2137 ;;
2138 ieee_1003.1-2001)
2139 AC_MSG_RESULT(IEEE 1003.1)
2141 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2142 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2143 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2144 CCOLLATE_CC=config/locale/generic/collate_members.cc
2145 CCTYPE_CC=config/locale/generic/ctype_members.cc
2146 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2147 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2148 CMONEY_CC=config/locale/generic/monetary_members.cc
2149 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2150 CTIME_H=config/locale/generic/time_members.h
2151 CTIME_CC=config/locale/generic/time_members.cc
2152 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2153 ;;
2154 newlib)
2155 AC_MSG_RESULT(newlib)
2157 CLOCALE_H=config/locale/generic/c_locale.h
2158 CLOCALE_CC=config/locale/generic/c_locale.cc
2159 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2160 CCOLLATE_CC=config/locale/generic/collate_members.cc
2161 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2162 CMESSAGES_H=config/locale/generic/messages_members.h
2163 CMESSAGES_CC=config/locale/generic/messages_members.cc
2164 CMONEY_CC=config/locale/generic/monetary_members.cc
2165 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2166 CTIME_H=config/locale/generic/time_members.h
2167 CTIME_CC=config/locale/generic/time_members.cc
2168 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2169 ;;
2170 esac
2172 # This is where the testsuite looks for locale catalogs, using the
2173 # -DLOCALEDIR define during testsuite compilation.
2174 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2175 AC_SUBST(glibcxx_localedir)
2177 # A standalone libintl (e.g., GNU libintl) may be in use.
2178 if test $USE_NLS = yes; then
2179 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2180 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2181 fi
2182 if test $USE_NLS = yes; then
2183 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2184 [Define if NLS translations are to be used.])
2185 fi
2187 AC_SUBST(USE_NLS)
2188 AC_SUBST(CLOCALE_H)
2189 AC_SUBST(CMESSAGES_H)
2190 AC_SUBST(CCODECVT_CC)
2191 AC_SUBST(CCOLLATE_CC)
2192 AC_SUBST(CCTYPE_CC)
2193 AC_SUBST(CMESSAGES_CC)
2194 AC_SUBST(CMONEY_CC)
2195 AC_SUBST(CNUMERIC_CC)
2196 AC_SUBST(CTIME_H)
2197 AC_SUBST(CTIME_CC)
2198 AC_SUBST(CLOCALE_CC)
2199 AC_SUBST(CLOCALE_INTERNAL_H)
2200 ])
2203 dnl
2204 dnl Check for which std::allocator base class to use. The choice is
2205 dnl mapped from a subdirectory of include/ext.
2206 dnl
2207 dnl Default is new.
2208 dnl
2209 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2210 AC_MSG_CHECKING([for std::allocator base class])
2211 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2212 [use KIND for target std::allocator base],
2213 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2215 # If they didn't use this option switch, or if they specified --enable
2216 # with no specific model, we'll have to look for one. If they
2217 # specified --disable (???), do likewise.
2218 if test $enable_libstdcxx_allocator = no ||
2219 test $enable_libstdcxx_allocator = yes;
2220 then
2221 enable_libstdcxx_allocator=auto
2222 fi
2224 # Either a known package, or "auto". Auto implies the default choice
2225 # for a particular platform.
2226 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2228 # Probe for host-specific support if no specific model is specified.
2229 # Default to "new".
2230 if test $enable_libstdcxx_allocator_flag = auto; then
2231 case ${target_os} in
2232 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2233 enable_libstdcxx_allocator_flag=new
2234 ;;
2235 *)
2236 enable_libstdcxx_allocator_flag=new
2237 ;;
2238 esac
2239 fi
2240 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2243 # Set configure bits for specified locale package
2244 case ${enable_libstdcxx_allocator_flag} in
2245 bitmap)
2246 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2247 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2248 ;;
2249 malloc)
2250 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2251 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2252 ;;
2253 mt)
2254 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2255 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2256 ;;
2257 new)
2258 ALLOCATOR_H=config/allocator/new_allocator_base.h
2259 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2260 ;;
2261 pool)
2262 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2263 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2264 ;;
2265 esac
2267 AC_SUBST(ALLOCATOR_H)
2268 AC_SUBST(ALLOCATOR_NAME)
2269 ])
2272 dnl
2273 dnl Check for whether the Boost-derived checks should be turned on.
2274 dnl
2275 dnl --enable-concept-checks turns them on.
2276 dnl --disable-concept-checks leaves them off.
2277 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2278 dnl Where DEFAULT is either `yes' or `no'.
2279 dnl
2280 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2281 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2282 if test $enable_concept_checks = yes; then
2283 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2284 [Define to use concept checking code from the boost libraries.])
2285 fi
2286 ])
2288 dnl
2289 dnl Use extern templates.
2290 dnl
2291 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2292 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2294 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2295 dnl Where DEFAULT is `yes' or `no'.
2296 dnl
2297 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2299 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2301 AC_MSG_CHECKING([for extern template support])
2302 AC_MSG_RESULT([$enable_extern_template])
2304 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2305 ])
2307 dnl
2308 dnl Use vtable verification.
2309 dnl
2310 dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2311 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2313 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2314 dnl Where DEFAULT is `yes' or `no'.
2315 dnl
2316 AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2318 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2320 AC_MSG_CHECKING([for vtable verify support])
2321 AC_MSG_RESULT([$enable_vtable_verify])
2323 vtv_cygmin=no
2324 if test $enable_vtable_verify = yes; then
2325 case ${target_os} in
2326 cygwin*|mingw32*)
2327 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2328 vtv_cygmin=yes
2329 ;;
2330 *)
2331 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2332 ;;
2333 esac
2334 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2335 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2336 else
2337 VTV_CXXFLAGS=
2338 VTV_PCH_CXXFLAGS=
2339 VTV_CXXLINKFLAGS=
2340 fi
2342 AC_SUBST(VTV_CXXFLAGS)
2343 AC_SUBST(VTV_PCH_CXXFLAGS)
2344 AC_SUBST(VTV_CXXLINKFLAGS)
2345 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2346 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2347 ])
2349 dnl
2350 dnl Check for parallel mode pre-requisites, including OpenMP support.
2351 dnl
2352 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2353 dnl
2354 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2356 enable_parallel=no;
2358 # See if configured libgomp/omp.h exists. (libgomp may be in
2359 # noconfigdirs but not explicitly disabled.)
2360 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2361 enable_parallel=yes;
2362 else
2363 AC_MSG_NOTICE([target-libgomp not built])
2364 fi
2366 AC_MSG_CHECKING([for parallel mode support])
2367 AC_MSG_RESULT([$enable_parallel])
2368 ])
2371 dnl
2372 dnl Check for which I/O library to use: stdio, or something specific.
2373 dnl
2374 dnl Default is stdio.
2375 dnl
2376 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2377 AC_MSG_CHECKING([for underlying I/O to use])
2378 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2379 [use target-specific I/O package], [permit stdio])
2381 # Now that libio has been removed, you can have any color you want as long
2382 # as it's black. This is one big no-op until other packages are added, but
2383 # showing the framework never hurts.
2384 case ${enable_cstdio} in
2385 stdio)
2386 CSTDIO_H=config/io/c_io_stdio.h
2387 BASIC_FILE_H=config/io/basic_file_stdio.h
2388 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2389 AC_MSG_RESULT(stdio)
2390 ;;
2391 esac
2393 AC_SUBST(CSTDIO_H)
2394 AC_SUBST(BASIC_FILE_H)
2395 AC_SUBST(BASIC_FILE_CC)
2396 ])
2399 dnl
2400 dnl Check for "unusual" flags to pass to the compiler while building.
2401 dnl
2402 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2403 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2404 dnl --disable-cxx-flags passes nothing.
2405 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2406 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2407 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2408 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2409 dnl If "default flags" is an empty string, the effect is the same
2410 dnl as --disable or --enable=no.
2411 dnl
2412 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2413 AC_MSG_CHECKING([for extra compiler flags for building])
2414 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2415 [pass compiler FLAGS when building library],
2416 [case "x$enable_cxx_flags" in
2417 xno | x) enable_cxx_flags= ;;
2418 x-*) ;;
2419 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2420 esac])
2422 # Run through flags (either default or command-line) and set anything
2423 # extra (e.g., #defines) that must accompany particular g++ options.
2424 if test -n "$enable_cxx_flags"; then
2425 for f in $enable_cxx_flags; do
2426 case "$f" in
2427 -fhonor-std) ;;
2428 -*) ;;
2429 *) # and we're trying to pass /what/ exactly?
2430 AC_MSG_ERROR([compiler flags start with a -]) ;;
2431 esac
2432 done
2433 fi
2435 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2436 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2437 AC_SUBST(EXTRA_CXX_FLAGS)
2438 ])
2441 dnl
2442 dnl Check to see if debugging libraries are to be built.
2443 dnl
2444 dnl --enable-libstdcxx-debug
2445 dnl builds a separate set of debugging libraries in addition to the
2446 dnl normal (shared, static) libstdc++ binaries.
2447 dnl
2448 dnl --disable-libstdcxx-debug
2449 dnl builds only one (non-debug) version of libstdc++.
2450 dnl
2451 dnl --enable-libstdcxx-debug-flags=FLAGS
2452 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2453 dnl
2454 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2455 dnl Where DEFAULT is either `yes' or `no'.
2456 dnl
2457 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2458 AC_MSG_CHECKING([for additional debug build])
2459 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2460 AC_MSG_RESULT($enable_libstdcxx_debug)
2461 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2462 ])
2465 dnl
2466 dnl Check for explicit debug flags.
2467 dnl
2468 dnl --enable-libstdcxx-debug-flags='-O1'
2469 dnl is a general method for passing flags to be used when
2470 dnl building debug libraries with --enable-debug.
2471 dnl
2472 dnl --disable-libstdcxx-debug-flags does nothing.
2473 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2474 dnl If "default flags" is an empty string, the effect is the same
2475 dnl as --disable or --enable=no.
2476 dnl
2477 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2478 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2479 [pass compiler FLAGS when building debug library],
2480 [case "x$enable_libstdcxx_debug_flags" in
2481 xno | x) enable_libstdcxx_debug_flags= ;;
2482 x-*) ;;
2483 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2484 esac])
2486 # Option parsed, now set things appropriately
2487 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2488 AC_SUBST(DEBUG_FLAGS)
2490 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2491 ])
2494 dnl
2495 dnl Check if the user only wants a freestanding library implementation.
2496 dnl
2497 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2498 dnl installing only the headers required by [17.4.1.3] and the language
2499 dnl support library. More than that will be built (to keep the Makefiles
2500 dnl conveniently clean), but not installed.
2501 dnl
2502 dnl Sets:
2503 dnl is_hosted (yes/no)
2504 dnl
2505 dnl Defines:
2506 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2507 dnl
2508 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2509 AC_ARG_ENABLE([hosted-libstdcxx],
2510 AC_HELP_STRING([--disable-hosted-libstdcxx],
2511 [only build freestanding C++ runtime support]),,
2512 [case "$host" in
2513 arm*-*-symbianelf*)
2514 enable_hosted_libstdcxx=no
2515 ;;
2516 *)
2517 enable_hosted_libstdcxx=yes
2518 ;;
2519 esac])
2520 if test "$enable_hosted_libstdcxx" = no; then
2521 AC_MSG_NOTICE([Only freestanding libraries will be built])
2522 is_hosted=no
2523 hosted_define=0
2524 enable_abi_check=no
2525 enable_libstdcxx_pch=no
2526 else
2527 is_hosted=yes
2528 hosted_define=1
2529 fi
2530 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2531 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2532 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2533 ])
2536 dnl
2537 dnl Check if the user wants a non-verbose library implementation.
2538 dnl
2539 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2540 dnl standard error on termination.
2541 dnl
2542 dnl Defines:
2543 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2544 dnl
2545 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2546 AC_ARG_ENABLE([libstdcxx-verbose],
2547 AC_HELP_STRING([--disable-libstdcxx-verbose],
2548 [disable termination messages to standard error]),,
2549 [enable_libstdcxx_verbose=yes])
2550 if test x"$enable_libstdcxx_verbose" = xyes; then
2551 verbose_define=1
2552 else
2553 AC_MSG_NOTICE([verbose termination messages are disabled])
2554 verbose_define=0
2555 fi
2556 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
2557 [Define to 1 if a verbose library is built, or 0 otherwise.])
2558 ])
2561 dnl
2562 dnl Check for template specializations for the 'long long' type.
2563 dnl The result determines only whether 'long long' I/O is enabled; things
2564 dnl like numeric_limits<> specializations are always available.
2565 dnl
2566 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2567 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2568 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2569 dnl Where DEFAULT is either `yes' or `no'.
2570 dnl
2571 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2572 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2573 if test $enable_long_long = yes; then
2574 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2575 [Define if code specialized for long long should be used.])
2576 fi
2577 AC_MSG_CHECKING([for enabled long long specializations])
2578 AC_MSG_RESULT([$enable_long_long])
2579 ])
2582 dnl
2583 dnl Check for decimal floating point.
2584 dnl See:
2585 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2586 dnl
2587 dnl This checks to see if the host supports decimal floating point types.
2588 dnl
2589 dnl Defines:
2590 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2591 dnl
2592 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2594 # Fake what AC_TRY_COMPILE does, without linking as this is
2595 # unnecessary for this test.
2597 cat > conftest.$ac_ext << EOF
2598 [#]line __oline__ "configure"
2599 int main()
2600 {
2601 _Decimal32 d1;
2602 _Decimal64 d2;
2603 _Decimal128 d3;
2604 return 0;
2605 }
2606 EOF
2608 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2609 if AC_TRY_EVAL(ac_compile); then
2610 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2611 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2612 enable_dfp=yes
2613 else
2614 enable_dfp=no
2615 fi
2616 AC_MSG_RESULT($enable_dfp)
2617 rm -f conftest*
2618 ])
2620 dnl
2621 dnl Check for GNU 128-bit integer and floating point types.
2622 dnl
2623 dnl Note: also checks that the types aren't standard types.
2624 dnl
2625 dnl Defines:
2626 dnl _GLIBCXX_USE_INT128
2627 dnl _GLIBCXX_USE_FLOAT128
2628 dnl
2629 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
2631 AC_LANG_SAVE
2632 AC_LANG_CPLUSPLUS
2634 # Fake what AC_TRY_COMPILE does, without linking as this is
2635 # unnecessary for this test.
2637 cat > conftest.$ac_ext << EOF
2638 [#]line __oline__ "configure"
2639 template<typename T1, typename T2>
2640 struct same
2641 { typedef T2 type; };
2643 template<typename T>
2644 struct same<T, T>;
2646 int main()
2647 {
2648 typename same<long, __int128>::type i1;
2649 typename same<long long, __int128>::type i2;
2650 }
2651 EOF
2653 AC_MSG_CHECKING([for __int128])
2654 if AC_TRY_EVAL(ac_compile); then
2655 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
2656 [Define if __int128 is supported on this host.])
2657 enable_int128=yes
2658 else
2659 enable_int128=no
2660 fi
2661 AC_MSG_RESULT($enable_int128)
2662 rm -f conftest*
2664 cat > conftest.$ac_ext << EOF
2665 [#]line __oline__ "configure"
2666 template<typename T1, typename T2>
2667 struct same
2668 { typedef T2 type; };
2670 template<typename T>
2671 struct same<T, T>;
2673 int main()
2674 {
2675 typename same<double, __float128>::type f1;
2676 typename same<long double, __float128>::type f2;
2677 }
2678 EOF
2680 AC_MSG_CHECKING([for __float128])
2681 if AC_TRY_EVAL(ac_compile); then
2682 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
2683 [Define if __float128 is supported on this host.])
2684 enable_float128=yes
2685 else
2686 enable_float128=no
2687 fi
2688 AC_MSG_RESULT($enable_float128)
2689 rm -f conftest*
2691 AC_LANG_RESTORE
2692 ])
2694 dnl
2695 dnl Check for template specializations for the 'wchar_t' type.
2696 dnl
2697 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2698 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2699 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2700 dnl Where DEFAULT is either `yes' or `no'.
2701 dnl
2702 dnl Necessary support must also be present.
2703 dnl
2704 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2705 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2707 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2708 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2709 AC_MSG_CHECKING([for mbstate_t])
2710 AC_TRY_COMPILE([#include <wchar.h>],
2711 [mbstate_t teststate;],
2712 have_mbstate_t=yes, have_mbstate_t=no)
2713 AC_MSG_RESULT($have_mbstate_t)
2714 if test x"$have_mbstate_t" = xyes; then
2715 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2716 fi
2718 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2719 # ac_has_wchar_h.
2720 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2722 if test x"$enable_wchar_t" = x"yes"; then
2724 AC_LANG_SAVE
2725 AC_LANG_CPLUSPLUS
2727 if test x"$ac_has_wchar_h" = xyes &&
2728 test x"$ac_has_wctype_h" = xyes; then
2729 AC_TRY_COMPILE([#include <wchar.h>
2730 #include <stddef.h>
2731 wint_t i;
2732 long l = WEOF;
2733 long j = WCHAR_MIN;
2734 long k = WCHAR_MAX;
2735 namespace test
2736 {
2737 using ::btowc;
2738 using ::fgetwc;
2739 using ::fgetws;
2740 using ::fputwc;
2741 using ::fputws;
2742 using ::fwide;
2743 using ::fwprintf;
2744 using ::fwscanf;
2745 using ::getwc;
2746 using ::getwchar;
2747 using ::mbrlen;
2748 using ::mbrtowc;
2749 using ::mbsinit;
2750 using ::mbsrtowcs;
2751 using ::putwc;
2752 using ::putwchar;
2753 using ::swprintf;
2754 using ::swscanf;
2755 using ::ungetwc;
2756 using ::vfwprintf;
2757 using ::vswprintf;
2758 using ::vwprintf;
2759 using ::wcrtomb;
2760 using ::wcscat;
2761 using ::wcschr;
2762 using ::wcscmp;
2763 using ::wcscoll;
2764 using ::wcscpy;
2765 using ::wcscspn;
2766 using ::wcsftime;
2767 using ::wcslen;
2768 using ::wcsncat;
2769 using ::wcsncmp;
2770 using ::wcsncpy;
2771 using ::wcspbrk;
2772 using ::wcsrchr;
2773 using ::wcsrtombs;
2774 using ::wcsspn;
2775 using ::wcsstr;
2776 using ::wcstod;
2777 using ::wcstok;
2778 using ::wcstol;
2779 using ::wcstoul;
2780 using ::wcsxfrm;
2781 using ::wctob;
2782 using ::wmemchr;
2783 using ::wmemcmp;
2784 using ::wmemcpy;
2785 using ::wmemmove;
2786 using ::wmemset;
2787 using ::wprintf;
2788 using ::wscanf;
2789 }
2790 ],[],[], [enable_wchar_t=no])
2791 else
2792 enable_wchar_t=no
2793 fi
2795 AC_LANG_RESTORE
2796 fi
2798 if test x"$enable_wchar_t" = x"yes"; then
2799 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2800 [Define if code specialized for wchar_t should be used.])
2801 fi
2803 AC_MSG_CHECKING([for enabled wchar_t specializations])
2804 AC_MSG_RESULT([$enable_wchar_t])
2805 ])
2808 dnl
2809 dnl Check to see if building and using a C++ precompiled header can be done.
2810 dnl
2811 dnl --enable-libstdcxx-pch=yes
2812 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2813 dnl may work, after some light-hearted attempts to puzzle out compiler
2814 dnl support, flip bits on in include/Makefile.am
2815 dnl
2816 dnl --disable-libstdcxx-pch
2817 dnl turns off attempts to use or build stdc++.h.gch.
2818 dnl
2819 dnl Substs:
2820 dnl glibcxx_PCHFLAGS
2821 dnl
2822 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2823 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2824 if test $enable_libstdcxx_pch = yes; then
2825 AC_CACHE_CHECK([for compiler with PCH support],
2826 [glibcxx_cv_prog_CXX_pch],
2827 [ac_save_CXXFLAGS="$CXXFLAGS"
2828 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2829 AC_LANG_SAVE
2830 AC_LANG_CPLUSPLUS
2831 echo '#include <math.h>' > conftest.h
2832 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2833 -o conftest.h.gch 1>&5 2>&1 &&
2834 echo '#error "pch failed"' > conftest.h &&
2835 echo '#include "conftest.h"' > conftest.cc &&
2836 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2837 then
2838 glibcxx_cv_prog_CXX_pch=yes
2839 else
2840 glibcxx_cv_prog_CXX_pch=no
2841 fi
2842 rm -f conftest*
2843 CXXFLAGS=$ac_save_CXXFLAGS
2844 AC_LANG_RESTORE
2845 ])
2846 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2847 fi
2849 AC_MSG_CHECKING([for enabled PCH])
2850 AC_MSG_RESULT([$enable_libstdcxx_pch])
2852 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2853 if test $enable_libstdcxx_pch = yes; then
2854 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2855 else
2856 glibcxx_PCHFLAGS=""
2857 fi
2858 AC_SUBST(glibcxx_PCHFLAGS)
2859 ])
2862 dnl
2863 dnl Check for atomic builtins.
2864 dnl See:
2865 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
2866 dnl
2867 dnl This checks to see if the host supports the compiler-generated
2868 dnl builtins for atomic operations for various integral sizes. Note, this
2869 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2870 dnl that are used should be checked.
2871 dnl
2872 dnl Note:
2873 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
2874 dnl
2875 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2876 AC_LANG_SAVE
2877 AC_LANG_CPLUSPLUS
2878 old_CXXFLAGS="$CXXFLAGS"
2880 # Do link tests if possible, instead asm tests, limited to some platforms
2881 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
2882 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
2883 atomic_builtins_link_tests=no
2884 if test x$gcc_no_link != xyes; then
2885 # Can do link tests. Limit to some tested platforms
2886 case "$host" in
2887 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
2888 atomic_builtins_link_tests=yes
2889 ;;
2890 esac
2891 fi
2893 if test x$atomic_builtins_link_tests = xyes; then
2895 # Do link tests.
2897 CXXFLAGS="$CXXFLAGS -fno-exceptions"
2899 AC_MSG_CHECKING([for atomic builtins for bool])
2900 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
2901 AC_TRY_LINK(
2902 [ ],
2903 [typedef bool atomic_type;
2904 atomic_type c1;
2905 atomic_type c2;
2906 atomic_type c3(0);
2907 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2908 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2909 __ATOMIC_RELAXED);
2910 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2911 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2912 ],
2913 [glibcxx_cv_atomic_bool=yes],
2914 [glibcxx_cv_atomic_bool=no])
2915 ])
2916 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2918 AC_MSG_CHECKING([for atomic builtins for short])
2919 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
2920 AC_TRY_LINK(
2921 [ ],
2922 [typedef short atomic_type;
2923 atomic_type c1;
2924 atomic_type c2;
2925 atomic_type c3(0);
2926 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2927 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2928 __ATOMIC_RELAXED);
2929 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2930 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2931 ],
2932 [glibcxx_cv_atomic_short=yes],
2933 [glibcxx_cv_atomic_short=no])
2934 ])
2935 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2937 AC_MSG_CHECKING([for atomic builtins for int])
2938 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
2939 AC_TRY_LINK(
2940 [ ],
2941 [typedef int atomic_type;
2942 atomic_type c1;
2943 atomic_type c2;
2944 atomic_type c3(0);
2945 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2946 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2947 __ATOMIC_RELAXED);
2948 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2949 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2950 ],
2951 [glibcxx_cv_atomic_int=yes],
2952 [glibcxx_cv_atomic_int=no])
2953 ])
2954 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2956 AC_MSG_CHECKING([for atomic builtins for long long])
2957 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
2958 AC_TRY_LINK(
2959 [ ],
2960 [typedef long long atomic_type;
2961 atomic_type c1;
2962 atomic_type c2;
2963 atomic_type c3(0);
2964 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2965 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2966 __ATOMIC_RELAXED);
2967 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2968 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2969 ],
2970 [glibcxx_cv_atomic_long_long=yes],
2971 [glibcxx_cv_atomic_long_long=no])
2972 ])
2973 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2975 else
2977 # Do asm tests.
2979 # Compile unoptimized.
2980 CXXFLAGS='-O0 -S'
2982 # Fake what AC_TRY_COMPILE does.
2984 cat > conftest.$ac_ext << EOF
2985 [#]line __oline__ "configure"
2986 int main()
2987 {
2988 typedef bool atomic_type;
2989 atomic_type c1;
2990 atomic_type c2;
2991 atomic_type c3(0);
2992 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2993 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2994 __ATOMIC_RELAXED);
2995 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2996 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2998 return 0;
2999 }
3000 EOF
3002 AC_MSG_CHECKING([for atomic builtins for bool])
3003 if AC_TRY_EVAL(ac_compile); then
3004 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3005 glibcxx_cv_atomic_bool=no
3006 else
3007 glibcxx_cv_atomic_bool=yes
3008 fi
3009 fi
3010 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3011 rm -f conftest*
3013 cat > conftest.$ac_ext << EOF
3014 [#]line __oline__ "configure"
3015 int main()
3016 {
3017 typedef short atomic_type;
3018 atomic_type c1;
3019 atomic_type c2;
3020 atomic_type c3(0);
3021 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3022 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3023 __ATOMIC_RELAXED);
3024 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3025 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3027 return 0;
3028 }
3029 EOF
3031 AC_MSG_CHECKING([for atomic builtins for short])
3032 if AC_TRY_EVAL(ac_compile); then
3033 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3034 glibcxx_cv_atomic_short=no
3035 else
3036 glibcxx_cv_atomic_short=yes
3037 fi
3038 fi
3039 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3040 rm -f conftest*
3042 cat > conftest.$ac_ext << EOF
3043 [#]line __oline__ "configure"
3044 int main()
3045 {
3046 // NB: _Atomic_word not necessarily int.
3047 typedef int atomic_type;
3048 atomic_type c1;
3049 atomic_type c2;
3050 atomic_type c3(0);
3051 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3052 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3053 __ATOMIC_RELAXED);
3054 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3055 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3057 return 0;
3058 }
3059 EOF
3061 AC_MSG_CHECKING([for atomic builtins for int])
3062 if AC_TRY_EVAL(ac_compile); then
3063 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3064 glibcxx_cv_atomic_int=no
3065 else
3066 glibcxx_cv_atomic_int=yes
3067 fi
3068 fi
3069 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3070 rm -f conftest*
3072 cat > conftest.$ac_ext << EOF
3073 [#]line __oline__ "configure"
3074 int main()
3075 {
3076 typedef long long atomic_type;
3077 atomic_type c1;
3078 atomic_type c2;
3079 atomic_type c3(0);
3080 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3081 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3082 __ATOMIC_RELAXED);
3083 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3084 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3086 return 0;
3087 }
3088 EOF
3090 AC_MSG_CHECKING([for atomic builtins for long long])
3091 if AC_TRY_EVAL(ac_compile); then
3092 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3093 glibcxx_cv_atomic_long_long=no
3094 else
3095 glibcxx_cv_atomic_long_long=yes
3096 fi
3097 fi
3098 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3099 rm -f conftest*
3101 fi
3103 CXXFLAGS="$old_CXXFLAGS"
3104 AC_LANG_RESTORE
3106 # Set atomicity_dir to builtins if all but the long long test above passes.
3107 if test $glibcxx_cv_atomic_bool = yes \
3108 && test $glibcxx_cv_atomic_short = yes \
3109 && test $glibcxx_cv_atomic_int = yes; then
3110 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3111 [Define if the compiler supports C++11 atomics.])
3112 atomicity_dir=cpu/generic/atomicity_builtins
3113 fi
3115 # If still generic, set to mutex.
3116 if test $atomicity_dir = "cpu/generic" ; then
3117 atomicity_dir=cpu/generic/atomicity_mutex
3118 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3119 if test "x$target_thread_file" = xsingle; then
3120 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3121 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3122 else
3123 AC_MSG_WARN([They will be faked using a mutex.])
3124 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3125 fi
3126 fi
3128 ])
3131 dnl
3132 dnl Check for exception handling support. If an explicit enable/disable
3133 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
3134 dnl target may or may not support call frame exceptions.
3135 dnl
3136 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
3137 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
3138 dnl Neither one forces an attempt at detection.
3139 dnl
3140 dnl Defines:
3141 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
3142 dnl
3143 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
3144 AC_MSG_CHECKING([for exception model to use])
3145 AC_LANG_SAVE
3146 AC_LANG_CPLUSPLUS
3147 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
3148 [force use of builtin_setjmp for exceptions],
3149 [permit yes|no|auto])
3151 if test $enable_sjlj_exceptions = auto; then
3152 # Botheration. Now we've got to detect the exception model. Link tests
3153 # against libgcc.a are problematic since we've not been given proper -L
3154 # bits for single-tree newlib and libgloss.
3155 #
3156 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
3157 cat > conftest.$ac_ext << EOF
3158 [#]line __oline__ "configure"
3159 struct S { ~S(); };
3160 void bar();
3161 void foo()
3162 {
3163 S s;
3164 bar();
3165 }
3166 EOF
3167 old_CXXFLAGS="$CXXFLAGS"
3168 CXXFLAGS=-S
3169 if AC_TRY_EVAL(ac_compile); then
3170 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
3171 enable_sjlj_exceptions=yes
3172 elif grep _Unwind_SjLj_Register conftest.s >/dev/null 2>&1 ; then
3173 enable_sjlj_exceptions=yes
3174 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
3175 enable_sjlj_exceptions=no
3176 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
3177 enable_sjlj_exceptions=no
3178 fi
3179 fi
3180 CXXFLAGS="$old_CXXFLAGS"
3181 rm -f conftest*
3182 fi
3184 # This is a tad weird, for hysterical raisins. We have to map
3185 # enable/disable to two different models.
3186 case $enable_sjlj_exceptions in
3187 yes)
3188 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
3189 [Define if the compiler is configured for setjmp/longjmp exceptions.])
3190 ac_exception_model_name=sjlj
3191 ;;
3192 no)
3193 ac_exception_model_name="call frame"
3194 ;;
3195 *)
3196 AC_MSG_ERROR([unable to detect exception model])
3197 ;;
3198 esac
3199 AC_LANG_RESTORE
3200 AC_MSG_RESULT($ac_exception_model_name)
3201 ])
3204 dnl
3205 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3206 dnl
3207 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3208 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3209 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3210 dnl Where DEFAULT is 'yes'.
3211 dnl
3212 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3213 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3215 if test x$enable_libstdcxx_visibility = xyes ; then
3216 dnl all hail libgfortran
3217 dnl Check whether the target supports hidden visibility.
3218 AC_CACHE_CHECK([whether the target supports hidden visibility],
3219 glibcxx_cv_have_attribute_visibility, [
3220 save_CFLAGS="$CFLAGS"
3221 CFLAGS="$CFLAGS -Werror"
3222 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3223 [], glibcxx_cv_have_attribute_visibility=yes,
3224 glibcxx_cv_have_attribute_visibility=no)
3225 CFLAGS="$save_CFLAGS"])
3226 if test $glibcxx_cv_have_attribute_visibility = no; then
3227 enable_libstdcxx_visibility=no
3228 fi
3229 fi
3231 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3232 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3233 ])
3236 dnl
3237 dnl Add version tags to symbols in shared library (or not), additionally
3238 dnl marking other symbols as private/local (or not).
3239 dnl
3240 dnl Sets libtool_VERSION, and determines shared library SONAME.
3241 dnl
3242 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3243 dnl
3244 dnl --enable-symvers=style adds a version script to the linker call when
3245 dnl creating the shared library. The choice of version script is
3246 dnl controlled by 'style'.
3247 dnl --disable-symvers does not.
3248 dnl
3249 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3250 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3251 dnl choose a default style based on linker characteristics. Passing
3252 dnl 'no' disables versioning.
3253 dnl
3254 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3256 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3257 [enables symbol versioning of the shared library],
3258 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3260 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3261 # don't know enough about $LD to do tricks...
3262 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3263 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3264 # with extern "C++" in version scripts.
3265 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3267 # Turn a 'yes' into a suitable default.
3268 if test x$enable_symvers = xyes ; then
3269 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3270 enable_symvers=no
3271 else
3272 if test $with_gnu_ld = yes ; then
3273 case ${target_os} in
3274 hpux*)
3275 enable_symvers=no ;;
3276 *)
3277 enable_symvers=gnu ;;
3278 esac
3279 else
3280 case ${target_os} in
3281 darwin*)
3282 enable_symvers=darwin ;;
3283 # Sun symbol versioning exists since Solaris 2.5.
3284 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3285 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3286 # version scripts, so disable symbol versioning if none can be
3287 # found.
3288 if test -z "$ac_cv_path_CXXFILT"; then
3289 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3290 AC_MSG_WARN([=== no GNU c++filt could be found.])
3291 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3292 enable_symvers=no
3293 else
3294 enable_symvers=sun
3295 fi
3296 ;;
3297 *)
3298 enable_symvers=no ;;
3299 esac
3300 fi
3301 fi
3302 fi
3304 # Check to see if 'darwin' or 'darwin-export' can win.
3305 if test x$enable_symvers = xdarwin-export ; then
3306 enable_symvers=darwin
3307 fi
3309 # Check if 'sun' was requested on non-Solaris 2 platforms.
3310 if test x$enable_symvers = xsun ; then
3311 case ${target_os} in
3312 solaris2*)
3313 # All fine.
3314 ;;
3315 *)
3316 # Unlikely to work.
3317 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3318 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3319 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3320 enable_symvers=no
3321 ;;
3322 esac
3323 fi
3325 # Check to see if 'gnu' can win.
3326 if test $enable_symvers = gnu ||
3327 test $enable_symvers = gnu-versioned-namespace ||
3328 test $enable_symvers = sun; then
3329 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3330 AC_MSG_CHECKING([for shared libgcc])
3331 ac_save_CFLAGS="$CFLAGS"
3332 CFLAGS=' -lgcc_s'
3333 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3334 CFLAGS="$ac_save_CFLAGS"
3335 if test $glibcxx_shared_libgcc = no; then
3336 cat > conftest.c <<EOF
3337 int main (void) { return 0; }
3338 EOF
3339 changequote(,)dnl
3340 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3341 -shared -shared-libgcc -o conftest.so \
3342 conftest.c -v 2>&1 >/dev/null \
3343 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3344 changequote([,])dnl
3345 rm -f conftest.c conftest.so
3346 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3347 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3348 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3349 CFLAGS="$ac_save_CFLAGS"
3350 fi
3351 fi
3352 AC_MSG_RESULT($glibcxx_shared_libgcc)
3354 # For GNU ld, we need at least this version. The format is described in
3355 # GLIBCXX_CHECK_LINKER_FEATURES above.
3356 glibcxx_min_gnu_ld_version=21400
3358 # If no shared libgcc, can't win.
3359 if test $glibcxx_shared_libgcc != yes; then
3360 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3361 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3362 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3363 enable_symvers=no
3364 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3365 : All interesting versions of Sun ld support sun style symbol versioning.
3366 elif test $with_gnu_ld != yes ; then
3367 # just fail for now
3368 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3369 AC_MSG_WARN([=== you are not using the GNU linker.])
3370 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3371 enable_symvers=no
3372 elif test $glibcxx_ld_is_gold = yes ; then
3373 : All versions of gold support symbol versioning.
3374 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3375 # The right tools, the right setup, but too old. Fallbacks?
3376 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3377 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3378 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3379 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3380 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3381 enable_symvers=no
3382 fi
3383 fi
3385 # For libtool versioning info, format is CURRENT:REVISION:AGE
3386 libtool_VERSION=6:21:0
3388 # Everything parsed; figure out what files and settings to use.
3389 case $enable_symvers in
3390 no)
3391 SYMVER_FILE=config/abi/pre/none.ver
3392 ;;
3393 gnu)
3394 SYMVER_FILE=config/abi/pre/gnu.ver
3395 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3396 [Define to use GNU versioning in the shared library.])
3397 ;;
3398 gnu-versioned-namespace)
3399 libtool_VERSION=7:0:0
3400 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3401 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3402 [Define to use GNU namespace versioning in the shared library.])
3403 ;;
3404 darwin)
3405 SYMVER_FILE=config/abi/pre/gnu.ver
3406 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3407 [Define to use darwin versioning in the shared library.])
3408 ;;
3409 sun)
3410 SYMVER_FILE=config/abi/pre/gnu.ver
3411 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3412 [Define to use Sun versioning in the shared library.])
3413 ;;
3414 esac
3416 if test x$enable_symvers != xno ; then
3417 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3418 [Define to use symbol versioning in the shared library.])
3419 fi
3421 AC_CACHE_CHECK([whether the target supports .symver directive],
3422 glibcxx_cv_have_as_symver_directive, [
3423 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3424 [], glibcxx_cv_have_as_symver_directive=yes,
3425 glibcxx_cv_have_as_symver_directive=no)])
3426 if test $glibcxx_cv_have_as_symver_directive = yes; then
3427 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3428 [Define to 1 if the target assembler supports .symver directive.])
3429 fi
3431 AC_SUBST(SYMVER_FILE)
3432 AC_SUBST(port_specific_symbol_files)
3433 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3434 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3435 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3436 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3437 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3438 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3440 if test $enable_symvers != no ; then
3441 case ${target_os} in
3442 # The Solaris 2 runtime linker doesn't support the GNU extension of
3443 # binding the same symbol to different versions
3444 solaris2*)
3445 ;;
3446 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3447 *)
3448 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3449 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3450 ;;
3451 esac
3452 fi
3454 # Now, set up compatibility support, if any.
3455 # In addition, need this to deal with std::size_t mangling in
3456 # src/compatibility.cc. In a perfect world, could use
3457 # typeid(std::size_t).name()[0] to do direct substitution.
3458 AC_MSG_CHECKING([for size_t as unsigned int])
3459 ac_save_CFLAGS="$CFLAGS"
3460 CFLAGS="-Werror"
3461 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3462 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3463 CFLAGS=$ac_save_CFLAGS
3464 if test "$glibcxx_size_t_is_i" = yes; then
3465 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3466 fi
3467 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3469 AC_MSG_CHECKING([for ptrdiff_t as int])
3470 ac_save_CFLAGS="$CFLAGS"
3471 CFLAGS="-Werror"
3472 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3473 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3474 CFLAGS=$ac_save_CFLAGS
3475 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3476 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3477 fi
3478 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3479 ])
3482 dnl
3483 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3484 dnl We must stage the required headers so that they will be installed
3485 dnl with the library (unlike libgcc, the STL implementation is provided
3486 dnl solely within headers). Since we must not inject random user-space
3487 dnl macro names into user-provided C++ code, we first stage into <file>-in
3488 dnl and process to <file> with an output command. The reason for a two-
3489 dnl stage process here is to correctly handle $srcdir!=$objdir without
3490 dnl having to write complex code (the sed commands to clean the macro
3491 dnl namespace are complex and fragile enough as it is). We must also
3492 dnl add a relative path so that -I- is supported properly.
3493 dnl
3494 dnl Substs:
3495 dnl thread_header
3496 dnl
3497 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3498 AC_MSG_CHECKING([for thread model used by GCC])
3499 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3500 AC_MSG_RESULT([$target_thread_file])
3501 GCC_AC_THREAD_HEADER([$target_thread_file])
3502 ])
3505 dnl
3506 dnl Check if gthread implementation defines the types and functions
3507 dnl required by the c++0x thread library. Conforming gthread
3508 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3509 dnl
3510 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3511 dnl
3512 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3513 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3515 if test x$enable_libstdcxx_threads = xauto ||
3516 test x$enable_libstdcxx_threads = xyes; then
3518 AC_LANG_SAVE
3519 AC_LANG_CPLUSPLUS
3521 ac_save_CXXFLAGS="$CXXFLAGS"
3522 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3523 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3525 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3526 case $target_thread_file in
3527 posix)
3528 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3529 esac
3531 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3533 AC_TRY_COMPILE([#include <unistd.h>],
3534 [
3535 // In case of POSIX threads check _POSIX_TIMEOUTS.
3536 #if (defined(_PTHREADS) \
3537 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3538 #error
3539 #endif
3540 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3542 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3543 [Define to 1 if mutex_timedlock is available.])
3545 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3546 else res_mutex_timedlock=no ; fi
3547 AC_MSG_RESULT([$res_mutex_timedlock])
3549 AC_MSG_CHECKING([for gthreads library])
3551 AC_TRY_COMPILE([#include "gthr.h"],
3552 [
3553 #ifndef __GTHREADS_CXX0X
3554 #error
3555 #endif
3556 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3557 else
3558 ac_has_gthreads=no
3559 fi
3561 AC_MSG_RESULT([$ac_has_gthreads])
3563 if test x"$ac_has_gthreads" = x"yes"; then
3564 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3565 [Define if gthreads library is available.])
3567 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
3568 AC_CHECK_TYPE([pthread_rwlock_t],
3569 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
3570 [Define if POSIX read/write locks are available in <gthr.h>.])],
3571 [],
3572 [#include "gthr.h"])
3573 fi
3575 CXXFLAGS="$ac_save_CXXFLAGS"
3576 AC_LANG_RESTORE
3577 ])
3580 # Check whether LC_MESSAGES is available in <locale.h>.
3581 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3582 #
3583 # This file file be copied and used freely without restrictions. It can
3584 # be used in projects which are not available under the GNU Public License
3585 # but which still want to provide support for the GNU gettext functionality.
3586 # Please note that the actual code is *not* freely available.
3587 AC_DEFUN([AC_LC_MESSAGES], [
3588 AC_CHECK_HEADER(locale.h, [
3589 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3590 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3591 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3592 if test $ac_cv_val_LC_MESSAGES = yes; then
3593 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3594 [Define if LC_MESSAGES is available in <locale.h>.])
3595 fi
3596 ])
3597 ])
3599 dnl
3600 dnl Check whether rdrand is supported in the assembler.
3601 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3602 AC_MSG_CHECKING([for rdrand support in assembler])
3603 AC_CACHE_VAL(ac_cv_x86_rdrand, [
3604 ac_cv_x86_rdrand=no
3605 case "$target" in
3606 i?86-*-* | \
3607 x86_64-*-*)
3608 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3609 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3610 esac
3611 ])
3612 if test $ac_cv_x86_rdrand = yes; then
3613 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3614 [ Defined if as can handle rdrand. ])
3615 fi
3616 AC_MSG_RESULT($ac_cv_x86_rdrand)
3617 ])
3619 dnl
3620 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3621 dnl
3622 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3624 AC_LANG_SAVE
3625 AC_LANG_CPLUSPLUS
3626 ac_save_CXXFLAGS="$CXXFLAGS"
3627 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3629 AC_MSG_CHECKING([for get_nprocs])
3630 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3631 GCC_TRY_COMPILE_OR_LINK(
3632 [#include <sys/sysinfo.h>],
3633 [int n = get_nprocs();],
3634 [glibcxx_cv_GET_NPROCS=yes],
3635 [glibcxx_cv_GET_NPROCS=no])
3636 ])
3637 if test $glibcxx_cv_GET_NPROCS = yes; then
3638 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3639 fi
3640 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3642 CXXFLAGS="$ac_save_CXXFLAGS"
3643 AC_LANG_RESTORE
3644 ])
3646 dnl
3647 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3648 dnl
3649 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3651 AC_LANG_SAVE
3652 AC_LANG_CPLUSPLUS
3653 ac_save_CXXFLAGS="$CXXFLAGS"
3654 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3656 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3657 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3658 GCC_TRY_COMPILE_OR_LINK(
3659 [#include <unistd.h>],
3660 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3661 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3662 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3663 ])
3664 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3665 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3666 fi
3667 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3669 CXXFLAGS="$ac_save_CXXFLAGS"
3670 AC_LANG_RESTORE
3671 ])
3673 dnl
3674 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
3675 dnl
3676 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
3678 AC_LANG_SAVE
3679 AC_LANG_CPLUSPLUS
3680 ac_save_CXXFLAGS="$CXXFLAGS"
3681 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3683 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
3684 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
3685 GCC_TRY_COMPILE_OR_LINK(
3686 [#include <unistd.h>],
3687 [int n = sysconf(_SC_NPROC_ONLN);],
3688 [glibcxx_cv_SC_NPROC_ONLN=yes],
3689 [glibcxx_cv_SC_NPROC_ONLN=no])
3690 ])
3691 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
3692 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
3693 fi
3694 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
3696 CXXFLAGS="$ac_save_CXXFLAGS"
3697 AC_LANG_RESTORE
3698 ])
3700 dnl
3701 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
3702 dnl
3703 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
3705 AC_LANG_SAVE
3706 AC_LANG_CPLUSPLUS
3707 ac_save_CXXFLAGS="$CXXFLAGS"
3708 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3710 AC_MSG_CHECKING([for pthreads_num_processors_np])
3711 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
3712 GCC_TRY_COMPILE_OR_LINK(
3713 [#include <pthread.h>],
3714 [int n = pthread_num_processors_np();],
3715 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
3716 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
3717 ])
3718 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
3719 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
3720 fi
3721 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
3723 CXXFLAGS="$ac_save_CXXFLAGS"
3724 AC_LANG_RESTORE
3725 ])
3727 dnl
3728 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
3729 dnl
3730 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
3732 AC_LANG_SAVE
3733 AC_LANG_CPLUSPLUS
3734 ac_save_CXXFLAGS="$CXXFLAGS"
3735 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3737 AC_MSG_CHECKING([for hw.ncpu sysctl])
3738 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
3739 GCC_TRY_COMPILE_OR_LINK(
3740 [
3741 #include <stddef.h>
3742 #include <sys/sysctl.h>
3743 ],
3744 [
3745 int count;
3746 size_t size = sizeof(count);
3747 int mib[] = { CTL_HW, HW_NCPU };
3748 sysctl(mib, 2, &count, &size, NULL, 0);
3749 ],
3750 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
3751 [glibcxx_cv_SYSCTL_HW_NCPU=no])
3752 ])
3753 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
3754 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
3755 fi
3756 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
3758 CXXFLAGS="$ac_save_CXXFLAGS"
3759 AC_LANG_RESTORE
3760 ])
3762 dnl
3763 dnl Check to see if python pretty printing can be activated.
3764 dnl
3765 dnl --with-python-dir=dir
3766 dnl installs directory into $prefix/dir
3767 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
3769 AC_MSG_CHECKING([for custom python install directory])
3770 AC_ARG_WITH([python-dir],
3771 AS_HELP_STRING([--with-python-dir],
3772 [the location to install Python modules. This path is relative starting from the prefix.]),
3773 [with_python_dir=$withval], [with_python_dir="no"])
3774 AC_MSG_RESULT(${with_python_dir})
3776 # Needed for installing Python modules during make install.
3777 python_mod_dir="${with_python_dir}"
3778 AC_SUBST(python_mod_dir)
3779 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
3780 ])
3782 dnl
3783 dnl Check to see if -Werror is disabled.
3784 dnl
3785 dnl --enable-werror/--disable-werror
3786 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
3787 AC_MSG_CHECKING([for -Werror])
3788 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
3789 AC_MSG_RESULT($enable_werror)
3790 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
3791 ])
3793 dnl
3794 dnl Check whether obsolescent tmpnam is available in <stdio.h>,
3795 dnl and define _GLIBCXX_USE_TMPNAM.
3796 dnl
3797 AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
3798 dnl
3799 AC_LANG_SAVE
3800 AC_LANG_CPLUSPLUS
3801 ac_save_CXXFLAGS="$CXXFLAGS"
3802 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3803 dnl
3804 AC_MSG_CHECKING([for tmpnam])
3805 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
3806 GCC_TRY_COMPILE_OR_LINK(
3807 [#include <stdio.h>],
3808 [char *tmp = tmpnam(NULL);],
3809 [glibcxx_cv_TMPNAM=yes],
3810 [glibcxx_cv_TMPNAM=no])
3811 ])
3812 if test $glibcxx_cv_TMPNAM = yes; then
3813 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
3814 fi
3815 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
3816 dnl
3817 CXXFLAGS="$ac_save_CXXFLAGS"
3818 AC_LANG_RESTORE
3819 ])
3821 dnl
3822 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
3823 dnl Some versions of sdt.h were not compatible with C++11.
3824 dnl
3825 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
3826 AC_MSG_CHECKING([for suitable sys/sdt.h])
3827 # Note that this test has to be run with the C language.
3828 # Otherwise, sdt.h will try to include some headers from
3829 # libstdc++ itself.
3830 AC_LANG_SAVE
3831 AC_LANG_C
3832 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
3833 # Because we have to run the test in C, we use grep rather
3834 # than the compiler to check for the bug. The bug is that
3835 # were strings without trailing whitespace, causing g++
3836 # to look for operator"". The pattern searches for the fixed
3837 # output.
3838 AC_EGREP_CPP([ \",\" ], [
3839 #include <sys/sdt.h>
3840 int f() { STAP_PROBE(hi, bob); }
3841 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
3842 ])
3843 AC_LANG_RESTORE
3844 if test $glibcxx_cv_sys_sdt_h = yes; then
3845 AC_DEFINE(HAVE_SYS_SDT_H, 1,
3846 [Define to 1 if you have a suitable <sys/sdt.h> header file])
3847 fi
3848 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
3849 ])
3851 dnl
3852 dnl Control whether the library should define symbols for old and new ABIs.
3853 dnl This affects definitions of strings, stringstreams and locale facets.
3854 dnl
3855 dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
3856 dnl
3857 dnl Defines:
3858 dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
3859 dnl
3860 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
3861 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
3862 if test x$enable_symvers = xgnu-versioned-namespace; then
3863 # gnu-versioned-namespace is incompatible with the dual ABI.
3864 enable_libstdcxx_dual_abi="no"
3865 fi
3866 if test x"$enable_libstdcxx_dual_abi" != xyes; then
3867 AC_MSG_NOTICE([dual ABI is disabled])
3868 default_libstdcxx_abi="c++98"
3869 fi
3870 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
3871 ])
3873 dnl
3874 dnl Check to see which ABI should be enabled by default.
3875 dnl
3876 dnl --with-default-libstdcxx-abi={c++98,c++11}
3877 dnl
3878 dnl Defines:
3879 dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
3880 dnl
3881 AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
3882 if test x$enable_libstdcxx_dual_abi = xyes; then
3883 AC_MSG_CHECKING([for default std::string ABI to use])
3884 AC_ARG_WITH([default-libstdcxx-abi],
3885 AS_HELP_STRING([--with-default-libstdcxx-abi],
3886 [set the std::string ABI to use by default]),
3887 [case "$withval" in
3888 c++98|gnu++98|c++03|gnu++03) default_libstdcxx_abi="c++98" ;;
3889 c++1?|gnu++1?) default_libstdcxx_abi="c++11" ;;
3890 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
3891 esac],
3892 [default_libstdcxx_abi="c++11"])
3893 AC_MSG_RESULT(${default_libstdcxx_abi})
3894 fi
3895 if test $default_libstdcxx_abi = "c++11"; then
3896 glibcxx_cxx11_abi=1
3897 glibcxx_cxx98_abi=0
3898 else
3899 glibcxx_cxx11_abi=0
3900 glibcxx_cxx98_abi=1
3901 fi
3902 AC_SUBST(glibcxx_cxx98_abi)
3903 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
3904 ])
3907 # Macros from the top-level gcc directory.
3908 m4_include([../config/gc++filt.m4])
3909 m4_include([../config/tls.m4])
3910 m4_include([../config/gthr.m4])