| blob | 75e46671faf2b316d600fb2beb00d5c8a26ab80d |
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 $host.
32 dnl
33 dnl Sets:
34 dnl SUBDIRS
35 dnl Substs:
36 dnl glibcxx_builddir (absolute path)
37 dnl glibcxx_srcdir (absolute path)
38 dnl toplevel_builddir (absolute path)
39 dnl toplevel_srcdir (absolute path)
40 dnl with_cross_host
41 dnl with_newlib
42 dnl with_target_subdir
43 dnl plus
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
47 dnl
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/filesystem doc po testsuite python])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${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
918 AC_LANG_SAVE
919 AC_LANG_CPLUSPLUS
921 # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__
922 # undefined may cause fake C99 facilities, like pre-standard snprintf,
923 # to be spuriously enabled.
924 ac_save_CXXFLAGS="$CXXFLAGS"
925 CXXFLAGS="$CXXFLAGS -std=c++98"
926 ac_save_LIBS="$LIBS"
927 ac_save_gcc_no_link="$gcc_no_link"
929 if test x$gcc_no_link != xyes; then
930 # Use -fno-exceptions to that the C driver can link these tests without
931 # hitting undefined references to personality routines.
932 CXXFLAGS="$CXXFLAGS -fno-exceptions"
933 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
934 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
935 gcc_no_link=yes
936 ])
937 fi
939 # Check for the existence of <math.h> functions used if C99 is enabled.
940 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++98])
941 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx98, [
942 GCC_TRY_COMPILE_OR_LINK(
943 [#include <math.h>
944 volatile double d1, d2;
945 volatile int i;],
946 [i = fpclassify(d1);
947 i = isfinite(d1);
948 i = isinf(d1);
949 i = isnan(d1);
950 i = isnormal(d1);
951 i = signbit(d1);
952 i = isgreater(d1, d2);
953 i = isgreaterequal(d1, d2);
954 i = isless(d1, d2);
955 i = islessequal(d1, d2);
956 i = islessgreater(d1, d2);
957 i = islessgreater(d1, d2);
958 i = isunordered(d1, d2);
959 ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no])
960 ])
961 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx98)
962 if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then
963 AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1,
964 [Define if C99 functions or macros in <math.h> should be imported
965 in <cmath> in namespace std for C++98.])
966 fi
968 # Check for the existence of <complex.h> complex math functions.
969 # This is necessary even though libstdc++ uses the builtin versions
970 # of these functions, because if the builtin cannot be used, a reference
971 # to the library function is emitted.
972 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
973 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
974 if test x"$ac_has_complex_h" = x"yes"; then
975 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++98])
976 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx98, [
977 GCC_TRY_COMPILE_OR_LINK(
978 [#include <complex.h>
979 typedef __complex__ float float_type;
980 typedef __complex__ double double_type;
981 typedef __complex__ long double ld_type;
982 volatile float_type tmpf;
983 volatile double_type tmpd;
984 volatile ld_type tmpld;
985 volatile float f;
986 volatile double d;
987 volatile long double ld;],
988 [f = cabsf(tmpf);
989 f = cargf(tmpf);
990 tmpf = ccosf(tmpf);
991 tmpf = ccoshf(tmpf);
992 tmpf = cexpf(tmpf);
993 tmpf = clogf(tmpf);
994 tmpf = csinf(tmpf);
995 tmpf = csinhf(tmpf);
996 tmpf = csqrtf(tmpf);
997 tmpf = ctanf(tmpf);
998 tmpf = ctanhf(tmpf);
999 tmpf = cpowf(tmpf, tmpf);
1000 tmpf = cprojf(tmpf);
1001 d = cabs(tmpd);
1002 d = carg(tmpd);
1003 tmpd = ccos(tmpd);
1004 tmpd = ccosh(tmpd);
1005 tmpd = cexp(tmpd);
1006 tmpd = clog(tmpd);
1007 tmpd = csin(tmpd);
1008 tmpd = csinh(tmpd);
1009 tmpd = csqrt(tmpd);
1010 tmpd = ctan(tmpd);
1011 tmpd = ctanh(tmpd);
1012 tmpd = cpow(tmpd, tmpd);
1013 tmpd = cproj(tmpd);
1014 ld = cabsl(tmpld);
1015 ld = cargl(tmpld);
1016 tmpld = ccosl(tmpld);
1017 tmpld = ccoshl(tmpld);
1018 tmpld = cexpl(tmpld);
1019 tmpld = clogl(tmpld);
1020 tmpld = csinl(tmpld);
1021 tmpld = csinhl(tmpld);
1022 tmpld = csqrtl(tmpld);
1023 tmpld = ctanl(tmpld);
1024 tmpld = ctanhl(tmpld);
1025 tmpld = cpowl(tmpld, tmpld);
1026 tmpld = cprojl(tmpld);
1027 ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no])
1028 ])
1029 fi
1030 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx98)
1031 if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then
1032 AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1,
1033 [Define if C99 functions in <complex.h> should be used in
1034 <complex> for C++98. Using compiler builtins for these functions
1035 requires corresponding C99 library functions to be present.])
1036 fi
1038 # Check for the existence in <stdio.h> of vscanf, et. al.
1039 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++98])
1040 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx98, [
1041 GCC_TRY_COMPILE_OR_LINK(
1042 [#include <stdio.h>
1043 #include <stdarg.h>
1044 void foo(char* fmt, ...)
1045 {
1046 va_list args; va_start(args, fmt);
1047 vfscanf(stderr, "%i", args);
1048 vscanf("%i", args);
1049 vsnprintf(fmt, 0, "%i", args);
1050 vsscanf(fmt, "%i", args);
1051 snprintf(fmt, 0, "%i");
1052 }], [],
1053 [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no])
1054 ])
1055 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx98)
1056 if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then
1057 AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1,
1058 [Define if C99 functions or macros in <stdio.h> should be imported
1059 in <cstdio> in namespace std for C++98.])
1060 fi
1062 # Check for the existence in <wchar.h> of wcstold, etc.
1063 if test x"$ac_has_wchar_h" = xyes &&
1064 test x"$ac_has_wctype_h" = xyes; then
1065 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++98])
1066 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx98, [
1067 AC_TRY_COMPILE([#include <wchar.h>
1068 namespace test
1069 {
1070 using ::wcstold;
1071 using ::wcstoll;
1072 using ::wcstoull;
1073 }
1074 ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no])
1075 ])
1077 # Checks for wide character functions that may not be present.
1078 # Injection of these is wrapped with guard macros.
1079 # NB: only put functions here, instead of immediately above, if
1080 # absolutely necessary.
1081 AC_TRY_COMPILE([#include <wchar.h>
1082 namespace test { using ::vfwscanf; }], [],
1083 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1085 AC_TRY_COMPILE([#include <wchar.h>
1086 namespace test { using ::vswscanf; }], [],
1087 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1089 AC_TRY_COMPILE([#include <wchar.h>
1090 namespace test { using ::vwscanf; }], [],
1091 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1093 AC_TRY_COMPILE([#include <wchar.h>
1094 namespace test { using ::wcstof; }], [],
1095 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1097 AC_TRY_COMPILE([#include <wctype.h>],
1098 [wint_t t; int i = iswblank(t);],
1099 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1101 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx98)
1102 if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then
1103 AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1,
1104 [Define if C99 functions or macros in <wchar.h> should be imported
1105 in <cwchar> in namespace std for C++98.])
1106 fi
1107 fi
1109 # Option parsed, now set things appropriately.
1110 if test x"$glibcxx_cv_c99_math_cxx98" = x"no" ||
1111 test x"$glibcxx_cv_c99_complex_cxx98" = x"no" ||
1112 test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" ||
1113 test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" ||
1114 test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then
1115 enable_c99=no;
1116 else
1117 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1118 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1119 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1120 fi
1122 gcc_no_link="$ac_save_gcc_no_link"
1123 LIBS="$ac_save_LIBS"
1124 CXXFLAGS="$ac_save_CXXFLAGS"
1125 AC_LANG_RESTORE
1127 AC_LANG_SAVE
1128 AC_LANG_CPLUSPLUS
1130 # Use -std=c++11 and test again for C99 library feature in C++11 mode.
1131 # For the reasons given above we use -std=c++11 not -std=gnu++11.
1132 ac_save_CXXFLAGS="$CXXFLAGS"
1133 CXXFLAGS="$CXXFLAGS -std=c++11"
1134 ac_save_LIBS="$LIBS"
1135 ac_save_gcc_no_link="$gcc_no_link"
1137 if test x$gcc_no_link != xyes; then
1138 # Use -fno-exceptions to that the C driver can link these tests without
1139 # hitting undefined references to personality routines.
1140 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1141 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
1142 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
1143 gcc_no_link=yes
1144 ])
1145 fi
1147 # Check for the existence of <math.h> functions used if C99 is enabled.
1148 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++11])
1149 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx11, [
1150 GCC_TRY_COMPILE_OR_LINK(
1151 [#include <math.h>
1152 volatile double d1, d2;
1153 volatile int i;],
1154 [i = fpclassify(d1);
1155 i = isfinite(d1);
1156 i = isinf(d1);
1157 i = isnan(d1);
1158 i = isnormal(d1);
1159 i = signbit(d1);
1160 i = isgreater(d1, d2);
1161 i = isgreaterequal(d1, d2);
1162 i = isless(d1, d2);
1163 i = islessequal(d1, d2);
1164 i = islessgreater(d1, d2);
1165 i = islessgreater(d1, d2);
1166 i = isunordered(d1, d2);
1167 ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no])
1168 ])
1169 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx11)
1170 if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then
1171 AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1,
1172 [Define if C99 functions or macros in <math.h> should be imported
1173 in <cmath> in namespace std for C++11.])
1174 fi
1176 # Check for the existence of <complex.h> complex math functions.
1177 # This is necessary even though libstdc++ uses the builtin versions
1178 # of these functions, because if the builtin cannot be used, a reference
1179 # to the library function is emitted.
1180 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
1181 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1182 if test x"$ac_has_complex_h" = x"yes"; then
1183 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++11])
1184 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx11, [
1185 GCC_TRY_COMPILE_OR_LINK(
1186 [#include <complex.h>
1187 typedef __complex__ float float_type;
1188 typedef __complex__ double double_type;
1189 typedef __complex__ long double ld_type;
1190 volatile float_type tmpf;
1191 volatile double_type tmpd;
1192 volatile ld_type tmpld;
1193 volatile float f;
1194 volatile double d;
1195 volatile long double ld;],
1196 [f = cabsf(tmpf);
1197 f = cargf(tmpf);
1198 tmpf = ccosf(tmpf);
1199 tmpf = ccoshf(tmpf);
1200 tmpf = cexpf(tmpf);
1201 tmpf = clogf(tmpf);
1202 tmpf = csinf(tmpf);
1203 tmpf = csinhf(tmpf);
1204 tmpf = csqrtf(tmpf);
1205 tmpf = ctanf(tmpf);
1206 tmpf = ctanhf(tmpf);
1207 tmpf = cpowf(tmpf, tmpf);
1208 tmpf = cprojf(tmpf);
1209 d = cabs(tmpd);
1210 d = carg(tmpd);
1211 tmpd = ccos(tmpd);
1212 tmpd = ccosh(tmpd);
1213 tmpd = cexp(tmpd);
1214 tmpd = clog(tmpd);
1215 tmpd = csin(tmpd);
1216 tmpd = csinh(tmpd);
1217 tmpd = csqrt(tmpd);
1218 tmpd = ctan(tmpd);
1219 tmpd = ctanh(tmpd);
1220 tmpd = cpow(tmpd, tmpd);
1221 tmpd = cproj(tmpd);
1222 ld = cabsl(tmpld);
1223 ld = cargl(tmpld);
1224 tmpld = ccosl(tmpld);
1225 tmpld = ccoshl(tmpld);
1226 tmpld = cexpl(tmpld);
1227 tmpld = clogl(tmpld);
1228 tmpld = csinl(tmpld);
1229 tmpld = csinhl(tmpld);
1230 tmpld = csqrtl(tmpld);
1231 tmpld = ctanl(tmpld);
1232 tmpld = ctanhl(tmpld);
1233 tmpld = cpowl(tmpld, tmpld);
1234 tmpld = cprojl(tmpld);
1235 ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no])
1236 ])
1237 fi
1238 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx11)
1239 if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then
1240 AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1,
1241 [Define if C99 functions in <complex.h> should be used in
1242 <complex> for C++11. Using compiler builtins for these functions
1243 requires corresponding C99 library functions to be present.])
1244 fi
1246 # Check for the existence in <stdio.h> of vscanf, et. al.
1247 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++11])
1248 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx11, [
1249 GCC_TRY_COMPILE_OR_LINK(
1250 [#include <stdio.h>
1251 #include <stdarg.h>
1252 void foo(char* fmt, ...)
1253 {
1254 va_list args; va_start(args, fmt);
1255 vfscanf(stderr, "%i", args);
1256 vscanf("%i", args);
1257 vsnprintf(fmt, 0, "%i", args);
1258 vsscanf(fmt, "%i", args);
1259 snprintf(fmt, 0, "%i");
1260 }], [],
1261 [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no])
1262 ])
1263 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx11)
1264 if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then
1265 AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1,
1266 [Define if C99 functions or macros in <stdio.h> should be imported
1267 in <cstdio> in namespace std for C++11.])
1268 fi
1270 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1271 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++11])
1272 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx11, [
1273 GCC_TRY_COMPILE_OR_LINK(
1274 [#include <stdlib.h>
1275 volatile float f;
1276 volatile long double ld;
1277 volatile unsigned long long ll;
1278 lldiv_t mydivt;],
1279 [char* tmp;
1280 f = strtof("gnu", &tmp);
1281 ld = strtold("gnu", &tmp);
1282 ll = strtoll("gnu", &tmp, 10);
1283 ll = strtoull("gnu", &tmp, 10);
1284 ll = llabs(10);
1285 mydivt = lldiv(10,1);
1286 ll = mydivt.quot;
1287 ll = mydivt.rem;
1288 ll = atoll("10");
1289 _Exit(0);
1290 ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no])
1291 ])
1292 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx11)
1293 if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then
1294 AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1,
1295 [Define if C99 functions or macros in <stdlib.h> should be imported
1296 in <cstdlib> in namespace std for C++11.])
1297 fi
1299 # Check for the existence in <wchar.h> of wcstold, etc.
1300 if test x"$ac_has_wchar_h" = xyes &&
1301 test x"$ac_has_wctype_h" = xyes; then
1302 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++11])
1303 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx11, [
1304 AC_TRY_COMPILE([#include <wchar.h>
1305 namespace test
1306 {
1307 using ::wcstold;
1308 using ::wcstoll;
1309 using ::wcstoull;
1310 }
1311 ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no])
1312 ])
1314 # Checks for wide character functions that may not be present.
1315 # Injection of these is wrapped with guard macros.
1316 # NB: only put functions here, instead of immediately above, if
1317 # absolutely necessary.
1318 AC_TRY_COMPILE([#include <wchar.h>
1319 namespace test { using ::vfwscanf; }], [],
1320 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1322 AC_TRY_COMPILE([#include <wchar.h>
1323 namespace test { using ::vswscanf; }], [],
1324 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1326 AC_TRY_COMPILE([#include <wchar.h>
1327 namespace test { using ::vwscanf; }], [],
1328 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1330 AC_TRY_COMPILE([#include <wchar.h>
1331 namespace test { using ::wcstof; }], [],
1332 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1334 AC_TRY_COMPILE([#include <wctype.h>],
1335 [wint_t t; int i = iswblank(t);],
1336 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1338 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx11)
1339 if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then
1340 AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1,
1341 [Define if C99 functions or macros in <wchar.h> should be imported
1342 in <cwchar> in namespace std for C++11.])
1343 fi
1344 fi
1346 gcc_no_link="$ac_save_gcc_no_link"
1347 LIBS="$ac_save_LIBS"
1348 CXXFLAGS="$ac_save_CXXFLAGS"
1349 AC_LANG_RESTORE
1350 fi
1352 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1353 AC_MSG_RESULT($enable_c99)
1354 ])
1357 dnl
1358 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1359 dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1360 dnl in the C++11 standard.
1361 dnl
1362 dnl --enable-libstdcxx-time
1363 dnl --enable-libstdcxx-time=yes
1364 dnl checks for the availability of monotonic and realtime clocks,
1365 dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
1366 dnl links in the latter.
1367 dnl --enable-libstdcxx-time=rt
1368 dnl also searches (and, if needed, links) librt. Note that this is
1369 dnl not always desirable because, in glibc 2.16 and earlier, for
1370 dnl example, in turn it triggers the linking of libpthread too,
1371 dnl which activates locking,
1372 dnl a large overhead for single-thread programs.
1373 dnl --enable-libstdcxx-time=no
1374 dnl --disable-libstdcxx-time
1375 dnl disables the checks completely
1376 dnl
1377 dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1378 dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1379 dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1380 dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1381 dnl
1382 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1384 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
1385 [use KIND for check type],
1386 [permit yes|no|rt])
1388 AC_LANG_SAVE
1389 AC_LANG_CPLUSPLUS
1390 ac_save_CXXFLAGS="$CXXFLAGS"
1391 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1392 ac_save_LIBS="$LIBS"
1394 ac_has_clock_monotonic=no
1395 ac_has_clock_realtime=no
1396 ac_has_nanosleep=no
1397 ac_has_sched_yield=no
1399 if test x"$enable_libstdcxx_time" = x"auto"; then
1401 case "${target_os}" in
1402 cygwin*)
1403 ac_has_nanosleep=yes
1404 ;;
1405 darwin*)
1406 ac_has_nanosleep=yes
1407 ac_has_sched_yield=yes
1408 ;;
1409 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
1410 AC_MSG_CHECKING([for at least GNU libc 2.17])
1411 AC_TRY_COMPILE(
1412 [#include <features.h>],
1413 [
1414 #if ! __GLIBC_PREREQ(2, 17)
1415 #error
1416 #endif
1417 ],
1418 [glibcxx_glibc217=yes], [glibcxx_glibc217=no])
1419 AC_MSG_RESULT($glibcxx_glibc217)
1421 if test x"$glibcxx_glibc217" = x"yes"; then
1422 ac_has_clock_monotonic=yes
1423 ac_has_clock_realtime=yes
1424 fi
1425 ac_has_nanosleep=yes
1426 ac_has_sched_yield=yes
1427 ;;
1428 freebsd*|netbsd*|dragonfly*)
1429 ac_has_clock_monotonic=yes
1430 ac_has_clock_realtime=yes
1431 ac_has_nanosleep=yes
1432 ac_has_sched_yield=yes
1433 ;;
1434 openbsd*)
1435 ac_has_clock_monotonic=yes
1436 ac_has_clock_realtime=yes
1437 ac_has_nanosleep=yes
1438 ;;
1439 solaris*)
1440 GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt"
1441 ac_has_clock_monotonic=yes
1442 ac_has_clock_realtime=yes
1443 ac_has_nanosleep=yes
1444 ac_has_sched_yield=yes
1445 ;;
1446 esac
1448 elif test x"$enable_libstdcxx_time" != x"no"; then
1450 if test x"$enable_libstdcxx_time" = x"rt"; then
1451 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1452 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1453 else
1454 AC_SEARCH_LIBS(clock_gettime, [posix4])
1455 AC_SEARCH_LIBS(nanosleep, [posix4])
1456 fi
1458 case "$ac_cv_search_clock_gettime" in
1459 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1460 ;;
1461 esac
1462 case "$ac_cv_search_nanosleep" in
1463 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1464 ;;
1465 esac
1467 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1469 case "$ac_cv_search_sched_yield" in
1470 -lposix4*)
1471 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1472 ac_has_sched_yield=yes
1473 ;;
1474 -lrt*)
1475 if test x"$enable_libstdcxx_time" = x"rt"; then
1476 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1477 ac_has_sched_yield=yes
1478 fi
1479 ;;
1480 *)
1481 ac_has_sched_yield=yes
1482 ;;
1483 esac
1485 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1487 if test x"$ac_has_unistd_h" = x"yes"; then
1488 AC_MSG_CHECKING([for monotonic clock])
1489 AC_TRY_LINK(
1490 [#include <unistd.h>
1491 #include <time.h>
1492 ],
1493 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1494 timespec tp;
1495 #endif
1496 clock_gettime(CLOCK_MONOTONIC, &tp);
1497 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1499 AC_MSG_RESULT($ac_has_clock_monotonic)
1501 AC_MSG_CHECKING([for realtime clock])
1502 AC_TRY_LINK(
1503 [#include <unistd.h>
1504 #include <time.h>
1505 ],
1506 [#if _POSIX_TIMERS > 0
1507 timespec tp;
1508 #endif
1509 clock_gettime(CLOCK_REALTIME, &tp);
1510 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1512 AC_MSG_RESULT($ac_has_clock_realtime)
1514 AC_MSG_CHECKING([for nanosleep])
1515 AC_TRY_LINK(
1516 [#include <unistd.h>
1517 #include <time.h>
1518 ],
1519 [#if _POSIX_TIMERS > 0
1520 timespec tp;
1521 #endif
1522 nanosleep(&tp, 0);
1523 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1525 AC_MSG_RESULT($ac_has_nanosleep)
1526 fi
1527 fi
1529 if test x"$ac_has_clock_monotonic" != x"yes"; then
1530 case ${target_os} in
1531 linux*)
1532 AC_MSG_CHECKING([for clock_gettime syscall])
1533 AC_TRY_COMPILE(
1534 [#include <unistd.h>
1535 #include <time.h>
1536 #include <sys/syscall.h>
1537 ],
1538 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1539 timespec tp;
1540 #endif
1541 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
1542 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
1543 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no])
1544 AC_MSG_RESULT($ac_has_clock_monotonic_syscall)
1545 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then
1546 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
1547 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ])
1548 ac_has_clock_monotonic=yes
1549 ac_has_clock_realtime=yes
1550 fi;;
1551 esac
1552 fi
1554 if test x"$ac_has_clock_monotonic" = x"yes"; then
1555 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1556 [ Defined if clock_gettime has monotonic clock support. ])
1557 fi
1559 if test x"$ac_has_clock_realtime" = x"yes"; then
1560 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1561 [ Defined if clock_gettime has realtime clock support. ])
1562 fi
1564 if test x"$ac_has_sched_yield" = x"yes"; then
1565 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1566 [ Defined if sched_yield is available. ])
1567 fi
1569 if test x"$ac_has_nanosleep" = x"yes"; then
1570 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1571 [ Defined if nanosleep is available. ])
1572 else
1573 AC_MSG_CHECKING([for sleep])
1574 AC_TRY_COMPILE([#include <unistd.h>],
1575 [sleep(1)],
1576 [ac_has_sleep=yes],[ac_has_sleep=no])
1577 if test x"$ac_has_sleep" = x"yes"; then
1578 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1579 fi
1580 AC_MSG_RESULT($ac_has_sleep)
1581 AC_MSG_CHECKING([for usleep])
1582 AC_TRY_COMPILE([#include <unistd.h>],
1583 [sleep(1);
1584 usleep(100);],
1585 [ac_has_usleep=yes],[ac_has_usleep=no])
1586 if test x"$ac_has_usleep" = x"yes"; then
1587 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1588 fi
1589 AC_MSG_RESULT($ac_has_usleep)
1590 fi
1592 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1593 AC_MSG_CHECKING([for Sleep])
1594 AC_TRY_COMPILE([#include <windows.h>],
1595 [Sleep(1)],
1596 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1597 if test x"$ac_has_win32_sleep" = x"yes"; then
1598 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1599 fi
1600 AC_MSG_RESULT($ac_has_win32_sleep)
1601 fi
1603 AC_SUBST(GLIBCXX_LIBS)
1605 CXXFLAGS="$ac_save_CXXFLAGS"
1606 LIBS="$ac_save_LIBS"
1607 AC_LANG_RESTORE
1608 ])
1610 dnl
1611 dnl Check for gettimeofday, used in the implementation of 20.11.7
1612 dnl [time.clock] in the C++11 standard.
1613 dnl
1614 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1616 AC_MSG_CHECKING([for gettimeofday])
1618 AC_LANG_SAVE
1619 AC_LANG_CPLUSPLUS
1620 ac_save_CXXFLAGS="$CXXFLAGS"
1621 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1623 ac_has_gettimeofday=no;
1624 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1625 if test x"$ac_has_sys_time_h" = x"yes"; then
1626 AC_MSG_CHECKING([for gettimeofday])
1627 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1628 [timeval tv; gettimeofday(&tv, 0);],
1629 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1631 AC_MSG_RESULT($ac_has_gettimeofday)
1632 fi
1634 if test x"$ac_has_gettimeofday" = x"yes"; then
1635 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1636 [ Defined if gettimeofday is available. ])
1637 fi
1639 CXXFLAGS="$ac_save_CXXFLAGS"
1640 AC_LANG_RESTORE
1641 ])
1643 dnl
1644 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1645 dnl facilities in Chapter 8, "C compatibility".
1646 dnl
1647 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1649 AC_LANG_SAVE
1650 AC_LANG_CPLUSPLUS
1652 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1653 # undefined and fake C99 facilities may be spuriously enabled.
1654 ac_save_CXXFLAGS="$CXXFLAGS"
1655 CXXFLAGS="$CXXFLAGS -std=c++98"
1657 # Check for the existence of <complex.h> complex math functions used
1658 # by tr1/complex.
1659 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1660 ac_c99_complex_tr1=no;
1661 if test x"$ac_has_complex_h" = x"yes"; then
1662 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1663 AC_TRY_COMPILE([#include <complex.h>],
1664 [typedef __complex__ float float_type; float_type tmpf;
1665 cacosf(tmpf);
1666 casinf(tmpf);
1667 catanf(tmpf);
1668 cacoshf(tmpf);
1669 casinhf(tmpf);
1670 catanhf(tmpf);
1671 typedef __complex__ double double_type; double_type tmpd;
1672 cacos(tmpd);
1673 casin(tmpd);
1674 catan(tmpd);
1675 cacosh(tmpd);
1676 casinh(tmpd);
1677 catanh(tmpd);
1678 typedef __complex__ long double ld_type; ld_type tmpld;
1679 cacosl(tmpld);
1680 casinl(tmpld);
1681 catanl(tmpld);
1682 cacoshl(tmpld);
1683 casinhl(tmpld);
1684 catanhl(tmpld);
1685 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1686 fi
1687 AC_MSG_RESULT($ac_c99_complex_tr1)
1688 if test x"$ac_c99_complex_tr1" = x"yes"; then
1689 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1690 [Define if C99 functions in <complex.h> should be used in
1691 <tr1/complex>. Using compiler builtins for these functions
1692 requires corresponding C99 library functions to be present.])
1693 fi
1695 # Check for the existence of <ctype.h> functions.
1696 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1697 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1698 AC_TRY_COMPILE([#include <ctype.h>],
1699 [int ch;
1700 int ret;
1701 ret = isblank(ch);
1702 ],[glibcxx_cv_c99_ctype_tr1=yes],
1703 [glibcxx_cv_c99_ctype_tr1=no])
1704 ])
1705 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1706 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1707 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1708 [Define if C99 functions in <ctype.h> should be imported in
1709 <tr1/cctype> in namespace std::tr1.])
1710 fi
1712 # Check for the existence of <fenv.h> functions.
1713 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1714 ac_c99_fenv_tr1=no;
1715 if test x"$ac_has_fenv_h" = x"yes"; then
1716 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1717 AC_TRY_COMPILE([#include <fenv.h>],
1718 [int except, mode;
1719 fexcept_t* pflag;
1720 fenv_t* penv;
1721 int ret;
1722 ret = feclearexcept(except);
1723 ret = fegetexceptflag(pflag, except);
1724 ret = feraiseexcept(except);
1725 ret = fesetexceptflag(pflag, except);
1726 ret = fetestexcept(except);
1727 ret = fegetround();
1728 ret = fesetround(mode);
1729 ret = fegetenv(penv);
1730 ret = feholdexcept(penv);
1731 ret = fesetenv(penv);
1732 ret = feupdateenv(penv);
1733 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1734 fi
1735 AC_MSG_RESULT($ac_c99_fenv_tr1)
1736 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1737 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1738 [Define if C99 functions in <fenv.h> should be imported in
1739 <tr1/cfenv> in namespace std::tr1.])
1740 fi
1742 # Check for the existence of <stdint.h> types.
1743 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1744 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1745 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1746 #define __STDC_CONSTANT_MACROS
1747 #include <stdint.h>],
1748 [typedef int8_t my_int8_t;
1749 my_int8_t i8 = INT8_MIN;
1750 i8 = INT8_MAX;
1751 typedef int16_t my_int16_t;
1752 my_int16_t i16 = INT16_MIN;
1753 i16 = INT16_MAX;
1754 typedef int32_t my_int32_t;
1755 my_int32_t i32 = INT32_MIN;
1756 i32 = INT32_MAX;
1757 typedef int64_t my_int64_t;
1758 my_int64_t i64 = INT64_MIN;
1759 i64 = INT64_MAX;
1760 typedef int_fast8_t my_int_fast8_t;
1761 my_int_fast8_t if8 = INT_FAST8_MIN;
1762 if8 = INT_FAST8_MAX;
1763 typedef int_fast16_t my_int_fast16_t;
1764 my_int_fast16_t if16 = INT_FAST16_MIN;
1765 if16 = INT_FAST16_MAX;
1766 typedef int_fast32_t my_int_fast32_t;
1767 my_int_fast32_t if32 = INT_FAST32_MIN;
1768 if32 = INT_FAST32_MAX;
1769 typedef int_fast64_t my_int_fast64_t;
1770 my_int_fast64_t if64 = INT_FAST64_MIN;
1771 if64 = INT_FAST64_MAX;
1772 typedef int_least8_t my_int_least8_t;
1773 my_int_least8_t il8 = INT_LEAST8_MIN;
1774 il8 = INT_LEAST8_MAX;
1775 typedef int_least16_t my_int_least16_t;
1776 my_int_least16_t il16 = INT_LEAST16_MIN;
1777 il16 = INT_LEAST16_MAX;
1778 typedef int_least32_t my_int_least32_t;
1779 my_int_least32_t il32 = INT_LEAST32_MIN;
1780 il32 = INT_LEAST32_MAX;
1781 typedef int_least64_t my_int_least64_t;
1782 my_int_least64_t il64 = INT_LEAST64_MIN;
1783 il64 = INT_LEAST64_MAX;
1784 typedef intmax_t my_intmax_t;
1785 my_intmax_t im = INTMAX_MAX;
1786 im = INTMAX_MIN;
1787 typedef intptr_t my_intptr_t;
1788 my_intptr_t ip = INTPTR_MAX;
1789 ip = INTPTR_MIN;
1790 typedef uint8_t my_uint8_t;
1791 my_uint8_t ui8 = UINT8_MAX;
1792 ui8 = UINT8_MAX;
1793 typedef uint16_t my_uint16_t;
1794 my_uint16_t ui16 = UINT16_MAX;
1795 ui16 = UINT16_MAX;
1796 typedef uint32_t my_uint32_t;
1797 my_uint32_t ui32 = UINT32_MAX;
1798 ui32 = UINT32_MAX;
1799 typedef uint64_t my_uint64_t;
1800 my_uint64_t ui64 = UINT64_MAX;
1801 ui64 = UINT64_MAX;
1802 typedef uint_fast8_t my_uint_fast8_t;
1803 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1804 uif8 = UINT_FAST8_MAX;
1805 typedef uint_fast16_t my_uint_fast16_t;
1806 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1807 uif16 = UINT_FAST16_MAX;
1808 typedef uint_fast32_t my_uint_fast32_t;
1809 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1810 uif32 = UINT_FAST32_MAX;
1811 typedef uint_fast64_t my_uint_fast64_t;
1812 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1813 uif64 = UINT_FAST64_MAX;
1814 typedef uint_least8_t my_uint_least8_t;
1815 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1816 uil8 = UINT_LEAST8_MAX;
1817 typedef uint_least16_t my_uint_least16_t;
1818 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1819 uil16 = UINT_LEAST16_MAX;
1820 typedef uint_least32_t my_uint_least32_t;
1821 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1822 uil32 = UINT_LEAST32_MAX;
1823 typedef uint_least64_t my_uint_least64_t;
1824 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1825 uil64 = UINT_LEAST64_MAX;
1826 typedef uintmax_t my_uintmax_t;
1827 my_uintmax_t uim = UINTMAX_MAX;
1828 uim = UINTMAX_MAX;
1829 typedef uintptr_t my_uintptr_t;
1830 my_uintptr_t uip = UINTPTR_MAX;
1831 uip = UINTPTR_MAX;
1832 ],[glibcxx_cv_c99_stdint_tr1=yes],
1833 [glibcxx_cv_c99_stdint_tr1=no])
1834 ])
1835 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1836 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1837 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1838 [Define if C99 types in <stdint.h> should be imported in
1839 <tr1/cstdint> in namespace std::tr1.])
1840 fi
1842 # Check for the existence of <math.h> functions.
1843 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1844 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1845 AC_TRY_COMPILE([#include <math.h>],
1846 [typedef double_t my_double_t;
1847 typedef float_t my_float_t;
1848 acosh(0.0);
1849 acoshf(0.0f);
1850 acoshl(0.0l);
1851 asinh(0.0);
1852 asinhf(0.0f);
1853 asinhl(0.0l);
1854 atanh(0.0);
1855 atanhf(0.0f);
1856 atanhl(0.0l);
1857 cbrt(0.0);
1858 cbrtf(0.0f);
1859 cbrtl(0.0l);
1860 copysign(0.0, 0.0);
1861 copysignf(0.0f, 0.0f);
1862 copysignl(0.0l, 0.0l);
1863 erf(0.0);
1864 erff(0.0f);
1865 erfl(0.0l);
1866 erfc(0.0);
1867 erfcf(0.0f);
1868 erfcl(0.0l);
1869 exp2(0.0);
1870 exp2f(0.0f);
1871 exp2l(0.0l);
1872 expm1(0.0);
1873 expm1f(0.0f);
1874 expm1l(0.0l);
1875 fdim(0.0, 0.0);
1876 fdimf(0.0f, 0.0f);
1877 fdiml(0.0l, 0.0l);
1878 fma(0.0, 0.0, 0.0);
1879 fmaf(0.0f, 0.0f, 0.0f);
1880 fmal(0.0l, 0.0l, 0.0l);
1881 fmax(0.0, 0.0);
1882 fmaxf(0.0f, 0.0f);
1883 fmaxl(0.0l, 0.0l);
1884 fmin(0.0, 0.0);
1885 fminf(0.0f, 0.0f);
1886 fminl(0.0l, 0.0l);
1887 hypot(0.0, 0.0);
1888 hypotf(0.0f, 0.0f);
1889 hypotl(0.0l, 0.0l);
1890 ilogb(0.0);
1891 ilogbf(0.0f);
1892 ilogbl(0.0l);
1893 lgamma(0.0);
1894 lgammaf(0.0f);
1895 lgammal(0.0l);
1896 llrint(0.0);
1897 llrintf(0.0f);
1898 llrintl(0.0l);
1899 llround(0.0);
1900 llroundf(0.0f);
1901 llroundl(0.0l);
1902 log1p(0.0);
1903 log1pf(0.0f);
1904 log1pl(0.0l);
1905 log2(0.0);
1906 log2f(0.0f);
1907 log2l(0.0l);
1908 logb(0.0);
1909 logbf(0.0f);
1910 logbl(0.0l);
1911 lrint(0.0);
1912 lrintf(0.0f);
1913 lrintl(0.0l);
1914 lround(0.0);
1915 lroundf(0.0f);
1916 lroundl(0.0l);
1917 nan(0);
1918 nanf(0);
1919 nanl(0);
1920 nearbyint(0.0);
1921 nearbyintf(0.0f);
1922 nearbyintl(0.0l);
1923 nextafter(0.0, 0.0);
1924 nextafterf(0.0f, 0.0f);
1925 nextafterl(0.0l, 0.0l);
1926 nexttoward(0.0, 0.0);
1927 nexttowardf(0.0f, 0.0f);
1928 nexttowardl(0.0l, 0.0l);
1929 remainder(0.0, 0.0);
1930 remainderf(0.0f, 0.0f);
1931 remainderl(0.0l, 0.0l);
1932 remquo(0.0, 0.0, 0);
1933 remquof(0.0f, 0.0f, 0);
1934 remquol(0.0l, 0.0l, 0);
1935 rint(0.0);
1936 rintf(0.0f);
1937 rintl(0.0l);
1938 round(0.0);
1939 roundf(0.0f);
1940 roundl(0.0l);
1941 scalbln(0.0, 0l);
1942 scalblnf(0.0f, 0l);
1943 scalblnl(0.0l, 0l);
1944 scalbn(0.0, 0);
1945 scalbnf(0.0f, 0);
1946 scalbnl(0.0l, 0);
1947 tgamma(0.0);
1948 tgammaf(0.0f);
1949 tgammal(0.0l);
1950 trunc(0.0);
1951 truncf(0.0f);
1952 truncl(0.0l);
1953 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1954 ])
1955 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1956 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1957 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1958 [Define if C99 functions or macros in <math.h> should be imported
1959 in <tr1/cmath> in namespace std::tr1.])
1960 fi
1962 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1963 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1964 ac_c99_inttypes_tr1=no;
1965 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1966 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1967 AC_TRY_COMPILE([#include <inttypes.h>],
1968 [intmax_t i, numer, denom, base;
1969 const char* s;
1970 char** endptr;
1971 intmax_t ret = imaxabs(i);
1972 imaxdiv_t dret = imaxdiv(numer, denom);
1973 ret = strtoimax(s, endptr, base);
1974 uintmax_t uret = strtoumax(s, endptr, base);
1975 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1976 fi
1977 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1978 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1979 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1980 [Define if C99 functions in <inttypes.h> should be imported in
1981 <tr1/cinttypes> in namespace std::tr1.])
1982 fi
1984 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
1985 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1986 ac_c99_inttypes_wchar_t_tr1=no;
1987 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1988 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1989 AC_TRY_COMPILE([#include <inttypes.h>],
1990 [intmax_t base;
1991 const wchar_t* s;
1992 wchar_t** endptr;
1993 intmax_t ret = wcstoimax(s, endptr, base);
1994 uintmax_t uret = wcstoumax(s, endptr, base);
1995 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1996 [ac_c99_inttypes_wchar_t_tr1=no])
1997 fi
1998 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1999 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
2000 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
2001 [Define if wchar_t C99 functions in <inttypes.h> should be
2002 imported in <tr1/cinttypes> in namespace std::tr1.])
2003 fi
2005 # Check for the existence of the <stdbool.h> header.
2006 AC_CHECK_HEADERS(stdbool.h)
2008 # Check for the existence of the <stdalign.h> header.
2009 AC_CHECK_HEADERS(stdalign.h)
2011 CXXFLAGS="$ac_save_CXXFLAGS"
2012 AC_LANG_RESTORE
2013 ])
2015 dnl
2016 dnl Check for uchar.h and usability.
2017 dnl
2018 AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [
2020 # Test uchar.h.
2021 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no)
2023 AC_LANG_SAVE
2024 AC_LANG_CPLUSPLUS
2025 ac_save_CXXFLAGS="$CXXFLAGS"
2026 CXXFLAGS="$CXXFLAGS -std=c++11"
2028 if test x"$ac_has_uchar_h" = x"yes"; then
2029 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>])
2030 AC_TRY_COMPILE([#include <uchar.h>
2031 #ifdef __STDC_UTF_16__
2032 long i = __STDC_UTF_16__;
2033 #endif
2034 #ifdef __STDC_UTF_32__
2035 long j = __STDC_UTF_32__;
2036 #endif
2037 namespace test
2038 {
2039 using ::c16rtomb;
2040 using ::c32rtomb;
2041 using ::mbrtoc16;
2042 using ::mbrtoc32;
2043 }
2044 ],
2045 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no])
2046 else
2047 ac_c11_uchar_cxx11=no
2048 fi
2049 AC_MSG_RESULT($ac_c11_uchar_cxx11)
2050 if test x"$ac_c11_uchar_cxx11" = x"yes"; then
2051 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1,
2052 [Define if C11 functions in <uchar.h> should be imported into
2053 namespace std in <cuchar>.])
2054 fi
2056 CXXFLAGS="$ac_save_CXXFLAGS"
2057 AC_LANG_RESTORE
2058 ])
2061 dnl
2062 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
2063 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
2064 dnl
2065 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
2067 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
2068 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
2069 if test -r /dev/random && test -r /dev/urandom; then
2070 ## For MSys environment the test above is detect as false-positive
2071 ## on mingw-targets. So disable it explicit for them.
2072 case ${target_os} in
2073 *mingw*) glibcxx_cv_random_tr1=no ;;
2074 *) glibcxx_cv_random_tr1=yes ;;
2075 esac
2076 else
2077 glibcxx_cv_random_tr1=no;
2078 fi
2079 ])
2080 AC_MSG_RESULT($glibcxx_cv_random_tr1)
2082 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
2083 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
2084 [Define if /dev/random and /dev/urandom are available for
2085 the random_device of TR1 (Chapter 5.1).])
2086 fi
2088 ])
2090 dnl
2091 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
2092 dnl
2093 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
2095 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
2096 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
2097 [#include <stdio.h>],
2098 [AC_MSG_ERROR([computing EOF failed])])
2099 ])
2100 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
2101 [Define to the value of the EOF integer constant.])
2103 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
2104 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
2105 [#include <stdio.h>],
2106 [AC_MSG_ERROR([computing SEEK_CUR failed])])
2107 ])
2108 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
2109 [Define to the value of the SEEK_CUR integer constant.])
2111 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
2112 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
2113 [#include <stdio.h>],
2114 [AC_MSG_ERROR([computing SEEK_END failed])])
2115 ])
2116 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
2117 [Define to the value of the SEEK_END integer constant.])
2118 ])
2120 dnl
2121 dnl Check whether required C++ overloads are present in <stdio.h>.
2122 dnl
2123 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
2125 AC_LANG_SAVE
2126 AC_LANG_CPLUSPLUS
2128 AC_MSG_CHECKING([for gets declaration])
2129 AC_CACHE_VAL(glibcxx_cv_gets, [
2130 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2131 [#include <stdio.h>
2132 namespace test
2133 {
2134 using ::gets;
2135 }
2136 ])],
2137 [glibcxx_cv_gets=yes],
2138 [glibcxx_cv_gets=no]
2139 )])
2141 if test $glibcxx_cv_gets = yes; then
2142 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h>.])
2143 fi
2144 AC_MSG_RESULT($glibcxx_cv_gets)
2146 AC_LANG_RESTORE
2147 ])
2149 dnl
2150 dnl Check whether required C++11 overloads are present in <math.h>.
2151 dnl
2152 AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
2154 AC_LANG_SAVE
2155 AC_LANG_CPLUSPLUS
2156 ac_save_CXXFLAGS="$CXXFLAGS"
2157 CXXFLAGS="$CXXFLAGS -std=c++11"
2159 case "$host" in
2160 *-*-solaris2.*)
2161 # Solaris 12 introduced the C++11 <math.h> overloads. A backport to
2162 # a Solaris 11.3 SRU is likely, maybe even a Solaris 10 patch.
2163 AC_MSG_CHECKING([for C++11 <math.h> overloads])
2164 AC_CACHE_VAL(glibcxx_cv_math11_overload, [
2165 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2166 [#include <math.h>
2167 #undef isfinite
2168 namespace std {
2169 inline bool isfinite(float __x)
2170 { return __builtin_isfinite(__x); }
2171 }
2172 ])],
2173 [glibcxx_cv_math11_overload=no],
2174 [glibcxx_cv_math11_overload=yes]
2175 )])
2177 # autoheader cannot handle indented templates.
2178 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO],
2179 [/* Define if all C++11 overloads are available in <math.h>. */
2180 #if __cplusplus >= 201103L
2181 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO
2182 #endif])
2184 if test $glibcxx_cv_math11_overload = yes; then
2185 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO)
2186 fi
2187 AC_MSG_RESULT([$glibcxx_cv_math11_overload])
2188 ;;
2189 esac
2191 CXXFLAGS="$ac_save_CXXFLAGS"
2192 AC_LANG_RESTORE
2193 ])
2195 dnl
2196 dnl Check whether macros, etc are present for <system_error>
2197 dnl
2198 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
2200 m4_pushdef([n_syserr], [1])dnl
2201 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
2202 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
2203 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
2204 ECHILD, ENOSPC, EPERM,
2205 ETIMEDOUT, EWOULDBLOCK],
2206 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
2207 AC_MSG_CHECKING([for syserr])
2208 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
2209 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
2210 [int i = syserr;])],
2211 [glibcxx_cv_system_error[]n_syserr=yes],
2212 [glibcxx_cv_system_error[]n_syserr=no])
2213 ])
2214 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
2215 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
2216 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
2217 fi
2218 m4_define([n_syserr], m4_incr(n_syserr))dnl
2219 m4_popdef([SYSERR])dnl
2220 ])
2221 m4_popdef([n_syserr])dnl
2222 ])
2224 dnl
2225 dnl Check for what type of C headers to use.
2226 dnl
2227 dnl --enable-cheaders= [does stuff].
2228 dnl --disable-cheaders [does not do anything, really].
2229 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
2230 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
2231 dnl
2232 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
2233 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
2234 [construct "C" headers for g++], [permit c|c_std|c_global])
2235 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2237 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2239 # Allow overrides to configure.host here.
2240 if test $enable_cheaders = c_global; then
2241 c_compatibility=yes
2242 fi
2244 AC_SUBST(C_INCLUDE_DIR)
2245 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2246 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
2247 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
2248 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
2249 ])
2252 dnl
2253 dnl Check for which locale library to use. The choice is mapped to
2254 dnl a subdirectory of config/locale.
2255 dnl
2256 dnl Default is generic.
2257 dnl
2258 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
2259 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
2260 [use MODEL for target locale package],
2261 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
2263 # Deal with gettext issues. Default to not using it (=no) until we detect
2264 # support for it later. Let the user turn it off via --e/d, but let that
2265 # default to on for easier handling.
2266 USE_NLS=no
2267 AC_ARG_ENABLE(nls,
2268 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2269 [],
2270 [enable_nls=yes])
2272 # Either a known package, or "auto"
2273 if test $enable_clocale = no || test $enable_clocale = yes; then
2274 enable_clocale=auto
2275 fi
2276 enable_clocale_flag=$enable_clocale
2278 # Probe for locale model to use if none specified.
2279 # Default to "generic".
2280 if test $enable_clocale_flag = auto; then
2281 case ${target_os} in
2282 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2283 enable_clocale_flag=gnu
2284 ;;
2285 darwin*)
2286 enable_clocale_flag=darwin
2287 ;;
2288 dragonfly* | freebsd*)
2289 enable_clocale_flag=dragonfly
2290 ;;
2291 openbsd*)
2292 enable_clocale_flag=newlib
2293 ;;
2294 *)
2295 if test x"$with_newlib" = x"yes"; then
2296 enable_clocale_flag=newlib
2297 else
2298 enable_clocale_flag=generic
2299 fi
2300 ;;
2301 esac
2302 fi
2304 # Sanity check model, and test for special functionality.
2305 if test $enable_clocale_flag = gnu; then
2306 AC_EGREP_CPP([_GLIBCXX_ok], [
2307 #include <features.h>
2308 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
2309 _GLIBCXX_ok
2310 #endif
2311 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2313 # Set it to scream when it hurts.
2314 ac_save_CFLAGS="$CFLAGS"
2315 CFLAGS="-Wimplicit-function-declaration -Werror"
2317 # Use strxfrm_l if available.
2318 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2319 #include <string.h>
2320 #include <locale.h>],
2321 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2322 AC_DEFINE(HAVE_STRXFRM_L, 1,
2323 [Define if strxfrm_l is available in <string.h>.]),)
2325 # Use strerror_l if available.
2326 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2327 #include <string.h>
2328 #include <locale.h>],
2329 [__locale_t loc; strerror_l(5, loc);],
2330 AC_DEFINE(HAVE_STRERROR_L, 1,
2331 [Define if strerror_l is available in <string.h>.]),)
2333 CFLAGS="$ac_save_CFLAGS"
2334 fi
2336 # Perhaps use strerror_r if available, and strerror_l isn't.
2337 ac_save_CFLAGS="$CFLAGS"
2338 CFLAGS="-Wimplicit-function-declaration -Werror"
2339 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2340 #include <string.h>
2341 #include <locale.h>],
2342 [char s[128]; strerror_r(5, s, 128);],
2343 AC_DEFINE(HAVE_STRERROR_R, 1,
2344 [Define if strerror_r is available in <string.h>.]),)
2345 CFLAGS="$ac_save_CFLAGS"
2347 # Set configure bits for specified locale package
2348 AC_MSG_CHECKING([for C locale to use])
2349 case ${enable_clocale_flag} in
2350 generic)
2351 AC_MSG_RESULT(generic)
2353 CLOCALE_H=config/locale/generic/c_locale.h
2354 CLOCALE_CC=config/locale/generic/c_locale.cc
2355 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2356 CCOLLATE_CC=config/locale/generic/collate_members.cc
2357 CCTYPE_CC=config/locale/generic/ctype_members.cc
2358 CMESSAGES_H=config/locale/generic/messages_members.h
2359 CMESSAGES_CC=config/locale/generic/messages_members.cc
2360 CMONEY_CC=config/locale/generic/monetary_members.cc
2361 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2362 CTIME_H=config/locale/generic/time_members.h
2363 CTIME_CC=config/locale/generic/time_members.cc
2364 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2365 ;;
2366 darwin)
2367 AC_MSG_RESULT(darwin)
2369 CLOCALE_H=config/locale/generic/c_locale.h
2370 CLOCALE_CC=config/locale/generic/c_locale.cc
2371 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2372 CCOLLATE_CC=config/locale/generic/collate_members.cc
2373 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2374 CMESSAGES_H=config/locale/generic/messages_members.h
2375 CMESSAGES_CC=config/locale/generic/messages_members.cc
2376 CMONEY_CC=config/locale/generic/monetary_members.cc
2377 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2378 CTIME_H=config/locale/generic/time_members.h
2379 CTIME_CC=config/locale/generic/time_members.cc
2380 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2381 ;;
2383 dragonfly)
2384 AC_MSG_RESULT(dragonfly or freebsd)
2386 CLOCALE_H=config/locale/dragonfly/c_locale.h
2387 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
2388 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2389 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
2390 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2391 CMESSAGES_H=config/locale/generic/messages_members.h
2392 CMESSAGES_CC=config/locale/generic/messages_members.cc
2393 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2394 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2395 CTIME_H=config/locale/dragonfly/time_members.h
2396 CTIME_CC=config/locale/dragonfly/time_members.cc
2397 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2398 ;;
2400 gnu)
2401 AC_MSG_RESULT(gnu)
2403 # Declare intention to use gettext, and add support for specific
2404 # languages.
2405 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2406 ALL_LINGUAS="de fr"
2408 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2409 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2410 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2411 USE_NLS=yes
2412 fi
2413 # Export the build objects.
2414 for ling in $ALL_LINGUAS; do \
2415 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2416 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2417 done
2418 AC_SUBST(glibcxx_MOFILES)
2419 AC_SUBST(glibcxx_POFILES)
2421 CLOCALE_H=config/locale/gnu/c_locale.h
2422 CLOCALE_CC=config/locale/gnu/c_locale.cc
2423 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2424 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2425 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2426 CMESSAGES_H=config/locale/gnu/messages_members.h
2427 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2428 CMONEY_CC=config/locale/gnu/monetary_members.cc
2429 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2430 CTIME_H=config/locale/gnu/time_members.h
2431 CTIME_CC=config/locale/gnu/time_members.cc
2432 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2433 ;;
2434 ieee_1003.1-2001)
2435 AC_MSG_RESULT(IEEE 1003.1)
2437 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2438 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2439 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2440 CCOLLATE_CC=config/locale/generic/collate_members.cc
2441 CCTYPE_CC=config/locale/generic/ctype_members.cc
2442 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2443 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2444 CMONEY_CC=config/locale/generic/monetary_members.cc
2445 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2446 CTIME_H=config/locale/generic/time_members.h
2447 CTIME_CC=config/locale/generic/time_members.cc
2448 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2449 ;;
2450 newlib)
2451 AC_MSG_RESULT(newlib)
2453 CLOCALE_H=config/locale/generic/c_locale.h
2454 CLOCALE_CC=config/locale/generic/c_locale.cc
2455 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2456 CCOLLATE_CC=config/locale/generic/collate_members.cc
2457 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2458 CMESSAGES_H=config/locale/generic/messages_members.h
2459 CMESSAGES_CC=config/locale/generic/messages_members.cc
2460 CMONEY_CC=config/locale/generic/monetary_members.cc
2461 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2462 CTIME_H=config/locale/generic/time_members.h
2463 CTIME_CC=config/locale/generic/time_members.cc
2464 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2465 ;;
2466 esac
2468 # This is where the testsuite looks for locale catalogs, using the
2469 # -DLOCALEDIR define during testsuite compilation.
2470 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2471 AC_SUBST(glibcxx_localedir)
2473 # A standalone libintl (e.g., GNU libintl) may be in use.
2474 if test $USE_NLS = yes; then
2475 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2476 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2477 fi
2478 if test $USE_NLS = yes; then
2479 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2480 [Define if NLS translations are to be used.])
2481 fi
2483 AC_SUBST(USE_NLS)
2484 AC_SUBST(CLOCALE_H)
2485 AC_SUBST(CMESSAGES_H)
2486 AC_SUBST(CCODECVT_CC)
2487 AC_SUBST(CCOLLATE_CC)
2488 AC_SUBST(CCTYPE_CC)
2489 AC_SUBST(CMESSAGES_CC)
2490 AC_SUBST(CMONEY_CC)
2491 AC_SUBST(CNUMERIC_CC)
2492 AC_SUBST(CTIME_H)
2493 AC_SUBST(CTIME_CC)
2494 AC_SUBST(CLOCALE_CC)
2495 AC_SUBST(CLOCALE_INTERNAL_H)
2496 ])
2499 dnl
2500 dnl Check for which std::allocator base class to use. The choice is
2501 dnl mapped from a subdirectory of include/ext.
2502 dnl
2503 dnl Default is new.
2504 dnl
2505 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2506 AC_MSG_CHECKING([for std::allocator base class])
2507 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2508 [use KIND for target std::allocator base],
2509 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2511 # If they didn't use this option switch, or if they specified --enable
2512 # with no specific model, we'll have to look for one. If they
2513 # specified --disable (???), do likewise.
2514 if test $enable_libstdcxx_allocator = no ||
2515 test $enable_libstdcxx_allocator = yes;
2516 then
2517 enable_libstdcxx_allocator=auto
2518 fi
2520 # Either a known package, or "auto". Auto implies the default choice
2521 # for a particular platform.
2522 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2524 # Probe for host-specific support if no specific model is specified.
2525 # Default to "new".
2526 if test $enable_libstdcxx_allocator_flag = auto; then
2527 case ${target_os} in
2528 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2529 enable_libstdcxx_allocator_flag=new
2530 ;;
2531 *)
2532 enable_libstdcxx_allocator_flag=new
2533 ;;
2534 esac
2535 fi
2536 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2539 # Set configure bits for specified locale package
2540 case ${enable_libstdcxx_allocator_flag} in
2541 bitmap)
2542 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2543 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2544 ;;
2545 malloc)
2546 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2547 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2548 ;;
2549 mt)
2550 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2551 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2552 ;;
2553 new)
2554 ALLOCATOR_H=config/allocator/new_allocator_base.h
2555 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2556 ;;
2557 pool)
2558 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2559 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2560 ;;
2561 esac
2563 AC_SUBST(ALLOCATOR_H)
2564 AC_SUBST(ALLOCATOR_NAME)
2565 ])
2568 dnl
2569 dnl Check for whether the Boost-derived checks should be turned on.
2570 dnl
2571 dnl --enable-concept-checks turns them on.
2572 dnl --disable-concept-checks leaves them off.
2573 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2574 dnl Where DEFAULT is either `yes' or `no'.
2575 dnl
2576 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2577 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2578 if test $enable_concept_checks = yes; then
2579 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2580 [Define to use concept checking code from the boost libraries.])
2581 fi
2582 ])
2584 dnl
2585 dnl Use extern templates.
2586 dnl
2587 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2588 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2590 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2591 dnl Where DEFAULT is `yes' or `no'.
2592 dnl
2593 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2595 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2597 AC_MSG_CHECKING([for extern template support])
2598 AC_MSG_RESULT([$enable_extern_template])
2600 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2601 ])
2603 dnl
2604 dnl Use vtable verification.
2605 dnl
2606 dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2607 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2609 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2610 dnl Where DEFAULT is `yes' or `no'.
2611 dnl
2612 AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2614 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2616 AC_MSG_CHECKING([for vtable verify support])
2617 AC_MSG_RESULT([$enable_vtable_verify])
2619 vtv_cygmin=no
2620 if test $enable_vtable_verify = yes; then
2621 case ${target_os} in
2622 cygwin*|mingw32*)
2623 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2624 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2625 vtv_cygmin=yes
2626 ;;
2627 darwin*)
2628 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2629 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2630 ;;
2631 solaris2*)
2632 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2633 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2634 ;;
2635 *)
2636 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2637 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2638 ;;
2639 esac
2640 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2641 else
2642 VTV_CXXFLAGS=
2643 VTV_PCH_CXXFLAGS=
2644 VTV_CXXLINKFLAGS=
2645 fi
2647 AC_SUBST(VTV_CXXFLAGS)
2648 AC_SUBST(VTV_PCH_CXXFLAGS)
2649 AC_SUBST(VTV_CXXLINKFLAGS)
2650 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2651 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2652 ])
2654 dnl
2655 dnl Check for parallel mode pre-requisites, including OpenMP support.
2656 dnl
2657 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2658 dnl
2659 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2661 enable_parallel=no;
2663 # See if configured libgomp/omp.h exists. (libgomp may be in
2664 # noconfigdirs but not explicitly disabled.)
2665 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2666 enable_parallel=yes;
2667 else
2668 AC_MSG_NOTICE([target-libgomp not built])
2669 fi
2671 AC_MSG_CHECKING([for parallel mode support])
2672 AC_MSG_RESULT([$enable_parallel])
2673 ])
2676 dnl
2677 dnl Check for which I/O library to use: stdio, or something specific.
2678 dnl
2679 dnl Default is stdio.
2680 dnl
2681 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2682 AC_MSG_CHECKING([for underlying I/O to use])
2683 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2684 [use target-specific I/O package], [permit stdio])
2686 # Now that libio has been removed, you can have any color you want as long
2687 # as it's black. This is one big no-op until other packages are added, but
2688 # showing the framework never hurts.
2689 case ${enable_cstdio} in
2690 stdio)
2691 CSTDIO_H=config/io/c_io_stdio.h
2692 BASIC_FILE_H=config/io/basic_file_stdio.h
2693 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2694 AC_MSG_RESULT(stdio)
2695 ;;
2696 esac
2698 AC_SUBST(CSTDIO_H)
2699 AC_SUBST(BASIC_FILE_H)
2700 AC_SUBST(BASIC_FILE_CC)
2701 ])
2704 dnl
2705 dnl Check for "unusual" flags to pass to the compiler while building.
2706 dnl
2707 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2708 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2709 dnl --disable-cxx-flags passes nothing.
2710 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2711 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2712 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2713 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2714 dnl If "default flags" is an empty string, the effect is the same
2715 dnl as --disable or --enable=no.
2716 dnl
2717 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2718 AC_MSG_CHECKING([for extra compiler flags for building])
2719 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2720 [pass compiler FLAGS when building library],
2721 [case "x$enable_cxx_flags" in
2722 xno | x) enable_cxx_flags= ;;
2723 x-*) ;;
2724 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2725 esac])
2727 # Run through flags (either default or command-line) and set anything
2728 # extra (e.g., #defines) that must accompany particular g++ options.
2729 if test -n "$enable_cxx_flags"; then
2730 for f in $enable_cxx_flags; do
2731 case "$f" in
2732 -fhonor-std) ;;
2733 -*) ;;
2734 *) # and we're trying to pass /what/ exactly?
2735 AC_MSG_ERROR([compiler flags start with a -]) ;;
2736 esac
2737 done
2738 fi
2740 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2741 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2742 AC_SUBST(EXTRA_CXX_FLAGS)
2743 ])
2746 dnl
2747 dnl Check to see if debugging libraries are to be built.
2748 dnl
2749 dnl --enable-libstdcxx-debug
2750 dnl builds a separate set of debugging libraries in addition to the
2751 dnl normal (shared, static) libstdc++ binaries.
2752 dnl
2753 dnl --disable-libstdcxx-debug
2754 dnl builds only one (non-debug) version of libstdc++.
2755 dnl
2756 dnl --enable-libstdcxx-debug-flags=FLAGS
2757 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2758 dnl
2759 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2760 dnl Where DEFAULT is either `yes' or `no'.
2761 dnl
2762 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2763 AC_MSG_CHECKING([for additional debug build])
2764 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2765 AC_MSG_RESULT($enable_libstdcxx_debug)
2766 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2767 ])
2770 dnl
2771 dnl Check for explicit debug flags.
2772 dnl
2773 dnl --enable-libstdcxx-debug-flags='-O1'
2774 dnl is a general method for passing flags to be used when
2775 dnl building debug libraries with --enable-libstdcxx-debug.
2776 dnl
2777 dnl --disable-libstdcxx-debug-flags does nothing.
2778 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2779 dnl If "default flags" is an empty string, the effect is the same
2780 dnl as --disable or --enable=no.
2781 dnl
2782 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2783 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2784 [pass compiler FLAGS when building debug library],
2785 [case "x$enable_libstdcxx_debug_flags" in
2786 xno | x) enable_libstdcxx_debug_flags= ;;
2787 x-*) ;;
2788 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2789 esac])
2791 # Option parsed, now set things appropriately
2792 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2793 AC_SUBST(DEBUG_FLAGS)
2795 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2796 ])
2799 dnl
2800 dnl Check if the user only wants a freestanding library implementation.
2801 dnl
2802 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2803 dnl installing only the headers required by [17.4.1.3] and the language
2804 dnl support library. More than that will be built (to keep the Makefiles
2805 dnl conveniently clean), but not installed.
2806 dnl
2807 dnl Sets:
2808 dnl is_hosted (yes/no)
2809 dnl
2810 dnl Defines:
2811 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2812 dnl
2813 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2814 AC_ARG_ENABLE([hosted-libstdcxx],
2815 AC_HELP_STRING([--disable-hosted-libstdcxx],
2816 [only build freestanding C++ runtime support]),,
2817 [case "$host" in
2818 arm*-*-symbianelf*)
2819 enable_hosted_libstdcxx=no
2820 ;;
2821 *)
2822 enable_hosted_libstdcxx=yes
2823 ;;
2824 esac])
2825 if test "$enable_hosted_libstdcxx" = no; then
2826 AC_MSG_NOTICE([Only freestanding libraries will be built])
2827 is_hosted=no
2828 hosted_define=0
2829 enable_abi_check=no
2830 enable_libstdcxx_pch=no
2831 else
2832 is_hosted=yes
2833 hosted_define=1
2834 fi
2835 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2836 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2837 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2838 ])
2841 dnl
2842 dnl Check if the user wants a non-verbose library implementation.
2843 dnl
2844 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2845 dnl standard error on termination.
2846 dnl
2847 dnl Defines:
2848 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2849 dnl
2850 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2851 AC_ARG_ENABLE([libstdcxx-verbose],
2852 AC_HELP_STRING([--disable-libstdcxx-verbose],
2853 [disable termination messages to standard error]),,
2854 [enable_libstdcxx_verbose=yes])
2855 if test x"$enable_libstdcxx_verbose" = xyes; then
2856 verbose_define=1
2857 else
2858 AC_MSG_NOTICE([verbose termination messages are disabled])
2859 verbose_define=0
2860 fi
2861 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
2862 [Define to 1 if a verbose library is built, or 0 otherwise.])
2863 ])
2866 dnl
2867 dnl Check for template specializations for the 'long long' type.
2868 dnl The result determines only whether 'long long' I/O is enabled; things
2869 dnl like numeric_limits<> specializations are always available.
2870 dnl
2871 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2872 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2873 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2874 dnl Where DEFAULT is either `yes' or `no'.
2875 dnl
2876 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2877 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2878 if test $enable_long_long = yes; then
2879 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2880 [Define if code specialized for long long should be used.])
2881 fi
2882 AC_MSG_CHECKING([for enabled long long specializations])
2883 AC_MSG_RESULT([$enable_long_long])
2884 ])
2887 dnl
2888 dnl Check for decimal floating point.
2889 dnl See:
2890 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2891 dnl
2892 dnl This checks to see if the host supports decimal floating point types.
2893 dnl
2894 dnl Defines:
2895 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2896 dnl
2897 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2899 # Fake what AC_TRY_COMPILE does, without linking as this is
2900 # unnecessary for this test.
2902 cat > conftest.$ac_ext << EOF
2903 [#]line __oline__ "configure"
2904 int main()
2905 {
2906 _Decimal32 d1;
2907 _Decimal64 d2;
2908 _Decimal128 d3;
2909 return 0;
2910 }
2911 EOF
2913 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2914 if AC_TRY_EVAL(ac_compile); then
2915 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2916 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2917 enable_dfp=yes
2918 else
2919 enable_dfp=no
2920 fi
2921 AC_MSG_RESULT($enable_dfp)
2922 rm -f conftest*
2923 ])
2925 dnl
2926 dnl Check for GNU 128-bit integer and floating point types.
2927 dnl
2928 dnl Note: also checks that the types aren't standard types.
2929 dnl
2930 dnl Defines:
2931 dnl _GLIBCXX_USE_INT128
2932 dnl _GLIBCXX_USE_FLOAT128
2933 dnl
2934 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
2936 AC_LANG_SAVE
2937 AC_LANG_CPLUSPLUS
2939 # Fake what AC_TRY_COMPILE does, without linking as this is
2940 # unnecessary for this test.
2942 cat > conftest.$ac_ext << EOF
2943 [#]line __oline__ "configure"
2944 template<typename T1, typename T2>
2945 struct same
2946 { typedef T2 type; };
2948 template<typename T>
2949 struct same<T, T>;
2951 int main()
2952 {
2953 typename same<long, __int128>::type i1;
2954 typename same<long long, __int128>::type i2;
2955 }
2956 EOF
2958 AC_MSG_CHECKING([for __int128])
2959 if AC_TRY_EVAL(ac_compile); then
2960 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
2961 [Define if __int128 is supported on this host.])
2962 enable_int128=yes
2963 else
2964 enable_int128=no
2965 fi
2966 AC_MSG_RESULT($enable_int128)
2967 rm -f conftest*
2969 cat > conftest.$ac_ext << EOF
2970 [#]line __oline__ "configure"
2971 template<typename T1, typename T2>
2972 struct same
2973 { typedef T2 type; };
2975 template<typename T>
2976 struct same<T, T>;
2978 int main()
2979 {
2980 typename same<double, __float128>::type f1;
2981 typename same<long double, __float128>::type f2;
2982 }
2983 EOF
2985 AC_MSG_CHECKING([for __float128])
2986 if AC_TRY_EVAL(ac_compile); then
2987 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
2988 [Define if __float128 is supported on this host.])
2989 enable_float128=yes
2990 else
2991 enable_float128=no
2992 fi
2993 AC_MSG_RESULT($enable_float128)
2994 rm -f conftest*
2996 AC_LANG_RESTORE
2997 ])
2999 dnl
3000 dnl Check for template specializations for the 'wchar_t' type.
3001 dnl
3002 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3003 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3004 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3005 dnl Where DEFAULT is either `yes' or `no'.
3006 dnl
3007 dnl Necessary support must also be present.
3008 dnl
3009 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3010 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
3012 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3013 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3014 AC_MSG_CHECKING([for mbstate_t])
3015 AC_TRY_COMPILE([#include <wchar.h>],
3016 [mbstate_t teststate;],
3017 have_mbstate_t=yes, have_mbstate_t=no)
3018 AC_MSG_RESULT($have_mbstate_t)
3019 if test x"$have_mbstate_t" = xyes; then
3020 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3021 fi
3023 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3024 # ac_has_wchar_h.
3025 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
3027 if test x"$enable_wchar_t" = x"yes"; then
3029 AC_LANG_SAVE
3030 AC_LANG_CPLUSPLUS
3032 if test x"$ac_has_wchar_h" = xyes &&
3033 test x"$ac_has_wctype_h" = xyes; then
3034 AC_TRY_COMPILE([#include <wchar.h>
3035 #include <stddef.h>
3036 wint_t i;
3037 long l = WEOF;
3038 long j = WCHAR_MIN;
3039 long k = WCHAR_MAX;
3040 namespace test
3041 {
3042 using ::btowc;
3043 using ::fgetwc;
3044 using ::fgetws;
3045 using ::fputwc;
3046 using ::fputws;
3047 using ::fwide;
3048 using ::fwprintf;
3049 using ::fwscanf;
3050 using ::getwc;
3051 using ::getwchar;
3052 using ::mbrlen;
3053 using ::mbrtowc;
3054 using ::mbsinit;
3055 using ::mbsrtowcs;
3056 using ::putwc;
3057 using ::putwchar;
3058 using ::swprintf;
3059 using ::swscanf;
3060 using ::ungetwc;
3061 using ::vfwprintf;
3062 using ::vswprintf;
3063 using ::vwprintf;
3064 using ::wcrtomb;
3065 using ::wcscat;
3066 using ::wcschr;
3067 using ::wcscmp;
3068 using ::wcscoll;
3069 using ::wcscpy;
3070 using ::wcscspn;
3071 using ::wcsftime;
3072 using ::wcslen;
3073 using ::wcsncat;
3074 using ::wcsncmp;
3075 using ::wcsncpy;
3076 using ::wcspbrk;
3077 using ::wcsrchr;
3078 using ::wcsrtombs;
3079 using ::wcsspn;
3080 using ::wcsstr;
3081 using ::wcstod;
3082 using ::wcstok;
3083 using ::wcstol;
3084 using ::wcstoul;
3085 using ::wcsxfrm;
3086 using ::wctob;
3087 using ::wmemchr;
3088 using ::wmemcmp;
3089 using ::wmemcpy;
3090 using ::wmemmove;
3091 using ::wmemset;
3092 using ::wprintf;
3093 using ::wscanf;
3094 }
3095 ],[],[], [enable_wchar_t=no])
3096 else
3097 enable_wchar_t=no
3098 fi
3100 AC_LANG_RESTORE
3101 fi
3103 if test x"$enable_wchar_t" = x"yes"; then
3104 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
3105 [Define if code specialized for wchar_t should be used.])
3106 fi
3108 AC_MSG_CHECKING([for enabled wchar_t specializations])
3109 AC_MSG_RESULT([$enable_wchar_t])
3110 ])
3113 dnl
3114 dnl Check to see if building and using a C++ precompiled header can be done.
3115 dnl
3116 dnl --enable-libstdcxx-pch=yes
3117 dnl default, this shows intent to use stdc++.h.gch If it looks like it
3118 dnl may work, after some light-hearted attempts to puzzle out compiler
3119 dnl support, flip bits on in include/Makefile.am
3120 dnl
3121 dnl --disable-libstdcxx-pch
3122 dnl turns off attempts to use or build stdc++.h.gch.
3123 dnl
3124 dnl Substs:
3125 dnl glibcxx_PCHFLAGS
3126 dnl
3127 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
3128 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
3129 if test $enable_libstdcxx_pch = yes; then
3130 AC_CACHE_CHECK([for compiler with PCH support],
3131 [glibcxx_cv_prog_CXX_pch],
3132 [ac_save_CXXFLAGS="$CXXFLAGS"
3133 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3134 AC_LANG_SAVE
3135 AC_LANG_CPLUSPLUS
3136 echo '#include <math.h>' > conftest.h
3137 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
3138 -o conftest.h.gch 1>&5 2>&1 &&
3139 echo '#error "pch failed"' > conftest.h &&
3140 echo '#include "conftest.h"' > conftest.cc &&
3141 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3142 then
3143 glibcxx_cv_prog_CXX_pch=yes
3144 else
3145 glibcxx_cv_prog_CXX_pch=no
3146 fi
3147 rm -f conftest*
3148 CXXFLAGS=$ac_save_CXXFLAGS
3149 AC_LANG_RESTORE
3150 ])
3151 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
3152 fi
3154 AC_MSG_CHECKING([for enabled PCH])
3155 AC_MSG_RESULT([$enable_libstdcxx_pch])
3157 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
3158 if test $enable_libstdcxx_pch = yes; then
3159 glibcxx_PCHFLAGS="-include bits/stdc++.h"
3160 else
3161 glibcxx_PCHFLAGS=""
3162 fi
3163 AC_SUBST(glibcxx_PCHFLAGS)
3164 ])
3167 dnl
3168 dnl Check for atomic builtins.
3169 dnl See:
3170 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
3171 dnl
3172 dnl This checks to see if the host supports the compiler-generated
3173 dnl builtins for atomic operations for various integral sizes. Note, this
3174 dnl is intended to be an all-or-nothing switch, so all the atomic operations
3175 dnl that are used should be checked.
3176 dnl
3177 dnl Note:
3178 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
3179 dnl
3180 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
3181 AC_LANG_SAVE
3182 AC_LANG_CPLUSPLUS
3183 old_CXXFLAGS="$CXXFLAGS"
3185 # Do link tests if possible, instead asm tests, limited to some platforms
3186 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3187 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3188 atomic_builtins_link_tests=no
3189 if test x$gcc_no_link != xyes; then
3190 # Can do link tests. Limit to some tested platforms
3191 case "$host" in
3192 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3193 atomic_builtins_link_tests=yes
3194 ;;
3195 esac
3196 fi
3198 if test x$atomic_builtins_link_tests = xyes; then
3200 # Do link tests.
3202 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3204 AC_MSG_CHECKING([for atomic builtins for bool])
3205 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
3206 AC_TRY_LINK(
3207 [ ],
3208 [typedef bool atomic_type;
3209 atomic_type c1;
3210 atomic_type c2;
3211 atomic_type c3(0);
3212 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3213 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3214 __ATOMIC_RELAXED);
3215 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3216 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3217 ],
3218 [glibcxx_cv_atomic_bool=yes],
3219 [glibcxx_cv_atomic_bool=no])
3220 ])
3221 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3223 AC_MSG_CHECKING([for atomic builtins for short])
3224 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
3225 AC_TRY_LINK(
3226 [ ],
3227 [typedef short atomic_type;
3228 atomic_type c1;
3229 atomic_type c2;
3230 atomic_type c3(0);
3231 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3232 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3233 __ATOMIC_RELAXED);
3234 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3235 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3236 ],
3237 [glibcxx_cv_atomic_short=yes],
3238 [glibcxx_cv_atomic_short=no])
3239 ])
3240 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3242 AC_MSG_CHECKING([for atomic builtins for int])
3243 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
3244 AC_TRY_LINK(
3245 [ ],
3246 [typedef int atomic_type;
3247 atomic_type c1;
3248 atomic_type c2;
3249 atomic_type c3(0);
3250 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3251 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3252 __ATOMIC_RELAXED);
3253 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3254 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3255 ],
3256 [glibcxx_cv_atomic_int=yes],
3257 [glibcxx_cv_atomic_int=no])
3258 ])
3259 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3261 AC_MSG_CHECKING([for atomic builtins for long long])
3262 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
3263 AC_TRY_LINK(
3264 [ ],
3265 [typedef long long atomic_type;
3266 atomic_type c1;
3267 atomic_type c2;
3268 atomic_type c3(0);
3269 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3270 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3271 __ATOMIC_RELAXED);
3272 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3273 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3274 ],
3275 [glibcxx_cv_atomic_long_long=yes],
3276 [glibcxx_cv_atomic_long_long=no])
3277 ])
3278 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3280 else
3282 # Do asm tests.
3284 # Compile unoptimized.
3285 CXXFLAGS='-O0 -S'
3287 # Fake what AC_TRY_COMPILE does.
3289 cat > conftest.$ac_ext << EOF
3290 [#]line __oline__ "configure"
3291 int main()
3292 {
3293 typedef bool atomic_type;
3294 atomic_type c1;
3295 atomic_type c2;
3296 atomic_type c3(0);
3297 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3298 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3299 __ATOMIC_RELAXED);
3300 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3301 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3303 return 0;
3304 }
3305 EOF
3307 AC_MSG_CHECKING([for atomic builtins for bool])
3308 if AC_TRY_EVAL(ac_compile); then
3309 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3310 glibcxx_cv_atomic_bool=no
3311 else
3312 glibcxx_cv_atomic_bool=yes
3313 fi
3314 fi
3315 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3316 rm -f conftest*
3318 cat > conftest.$ac_ext << EOF
3319 [#]line __oline__ "configure"
3320 int main()
3321 {
3322 typedef short atomic_type;
3323 atomic_type c1;
3324 atomic_type c2;
3325 atomic_type c3(0);
3326 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3327 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3328 __ATOMIC_RELAXED);
3329 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3330 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3332 return 0;
3333 }
3334 EOF
3336 AC_MSG_CHECKING([for atomic builtins for short])
3337 if AC_TRY_EVAL(ac_compile); then
3338 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3339 glibcxx_cv_atomic_short=no
3340 else
3341 glibcxx_cv_atomic_short=yes
3342 fi
3343 fi
3344 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3345 rm -f conftest*
3347 cat > conftest.$ac_ext << EOF
3348 [#]line __oline__ "configure"
3349 int main()
3350 {
3351 // NB: _Atomic_word not necessarily int.
3352 typedef int atomic_type;
3353 atomic_type c1;
3354 atomic_type c2;
3355 atomic_type c3(0);
3356 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3357 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3358 __ATOMIC_RELAXED);
3359 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3360 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3362 return 0;
3363 }
3364 EOF
3366 AC_MSG_CHECKING([for atomic builtins for int])
3367 if AC_TRY_EVAL(ac_compile); then
3368 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3369 glibcxx_cv_atomic_int=no
3370 else
3371 glibcxx_cv_atomic_int=yes
3372 fi
3373 fi
3374 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3375 rm -f conftest*
3377 cat > conftest.$ac_ext << EOF
3378 [#]line __oline__ "configure"
3379 int main()
3380 {
3381 typedef long long atomic_type;
3382 atomic_type c1;
3383 atomic_type c2;
3384 atomic_type c3(0);
3385 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3386 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3387 __ATOMIC_RELAXED);
3388 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3389 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3391 return 0;
3392 }
3393 EOF
3395 AC_MSG_CHECKING([for atomic builtins for long long])
3396 if AC_TRY_EVAL(ac_compile); then
3397 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3398 glibcxx_cv_atomic_long_long=no
3399 else
3400 glibcxx_cv_atomic_long_long=yes
3401 fi
3402 fi
3403 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3404 rm -f conftest*
3406 fi
3408 CXXFLAGS="$old_CXXFLAGS"
3409 AC_LANG_RESTORE
3411 # Set atomicity_dir to builtins if all but the long long test above passes.
3412 if test $glibcxx_cv_atomic_bool = yes \
3413 && test $glibcxx_cv_atomic_short = yes \
3414 && test $glibcxx_cv_atomic_int = yes; then
3415 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3416 [Define if the compiler supports C++11 atomics.])
3417 atomicity_dir=cpu/generic/atomicity_builtins
3418 fi
3420 # If still generic, set to mutex.
3421 if test $atomicity_dir = "cpu/generic" ; then
3422 atomicity_dir=cpu/generic/atomicity_mutex
3423 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3424 if test "x$target_thread_file" = xsingle; then
3425 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3426 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3427 else
3428 AC_MSG_WARN([They will be faked using a mutex.])
3429 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3430 fi
3431 fi
3433 ])
3436 dnl
3437 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3438 dnl
3439 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3440 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3441 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3442 dnl Where DEFAULT is 'yes'.
3443 dnl
3444 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3445 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3447 if test x$enable_libstdcxx_visibility = xyes ; then
3448 dnl all hail libgfortran
3449 dnl Check whether the target supports hidden visibility.
3450 AC_CACHE_CHECK([whether the target supports hidden visibility],
3451 glibcxx_cv_have_attribute_visibility, [
3452 save_CFLAGS="$CFLAGS"
3453 CFLAGS="$CFLAGS -Werror"
3454 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3455 [], glibcxx_cv_have_attribute_visibility=yes,
3456 glibcxx_cv_have_attribute_visibility=no)
3457 CFLAGS="$save_CFLAGS"])
3458 if test $glibcxx_cv_have_attribute_visibility = no; then
3459 enable_libstdcxx_visibility=no
3460 fi
3461 fi
3463 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3464 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3465 ])
3468 dnl
3469 dnl Add version tags to symbols in shared library (or not), additionally
3470 dnl marking other symbols as private/local (or not).
3471 dnl
3472 dnl Sets libtool_VERSION, and determines shared library SONAME.
3473 dnl
3474 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3475 dnl
3476 dnl --enable-symvers=style adds a version script to the linker call when
3477 dnl creating the shared library. The choice of version script is
3478 dnl controlled by 'style'.
3479 dnl --disable-symvers does not.
3480 dnl
3481 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3482 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3483 dnl choose a default style based on linker characteristics. Passing
3484 dnl 'no' disables versioning.
3485 dnl
3486 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3488 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3489 [enables symbol versioning of the shared library],
3490 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3492 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3493 # don't know enough about $LD to do tricks...
3494 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3495 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3496 # with extern "C++" in version scripts.
3497 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3499 # Turn a 'yes' into a suitable default.
3500 if test x$enable_symvers = xyes ; then
3501 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3502 enable_symvers=no
3503 else
3504 if test $with_gnu_ld = yes ; then
3505 case ${target_os} in
3506 hpux*)
3507 enable_symvers=no ;;
3508 *)
3509 enable_symvers=gnu ;;
3510 esac
3511 else
3512 case ${target_os} in
3513 darwin*)
3514 enable_symvers=darwin ;;
3515 # Sun symbol versioning exists since Solaris 2.5.
3516 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3517 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3518 # version scripts, so disable symbol versioning if none can be
3519 # found.
3520 if test -z "$ac_cv_path_CXXFILT"; then
3521 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3522 AC_MSG_WARN([=== no GNU c++filt could be found.])
3523 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3524 enable_symvers=no
3525 else
3526 enable_symvers=sun
3527 fi
3528 ;;
3529 *)
3530 enable_symvers=no ;;
3531 esac
3532 fi
3533 fi
3534 fi
3536 # Check to see if 'darwin' or 'darwin-export' can win.
3537 if test x$enable_symvers = xdarwin-export ; then
3538 enable_symvers=darwin
3539 fi
3541 # Check if 'sun' was requested on non-Solaris 2 platforms.
3542 if test x$enable_symvers = xsun ; then
3543 case ${target_os} in
3544 solaris2*)
3545 # All fine.
3546 ;;
3547 *)
3548 # Unlikely to work.
3549 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3550 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3551 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3552 enable_symvers=no
3553 ;;
3554 esac
3555 fi
3557 # Check to see if 'gnu' can win.
3558 if test $enable_symvers = gnu ||
3559 test $enable_symvers = gnu-versioned-namespace ||
3560 test $enable_symvers = sun; then
3561 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3562 AC_MSG_CHECKING([for shared libgcc])
3563 ac_save_CFLAGS="$CFLAGS"
3564 CFLAGS=' -lgcc_s'
3565 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3566 CFLAGS="$ac_save_CFLAGS"
3567 if test $glibcxx_shared_libgcc = no; then
3568 cat > conftest.c <<EOF
3569 int main (void) { return 0; }
3570 EOF
3571 changequote(,)dnl
3572 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3573 -shared -shared-libgcc -o conftest.so \
3574 conftest.c -v 2>&1 >/dev/null \
3575 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3576 changequote([,])dnl
3577 rm -f conftest.c conftest.so
3578 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3579 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3580 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3581 CFLAGS="$ac_save_CFLAGS"
3582 fi
3583 fi
3584 AC_MSG_RESULT($glibcxx_shared_libgcc)
3586 # For GNU ld, we need at least this version. The format is described in
3587 # GLIBCXX_CHECK_LINKER_FEATURES above.
3588 glibcxx_min_gnu_ld_version=21400
3590 # If no shared libgcc, can't win.
3591 if test $glibcxx_shared_libgcc != yes; then
3592 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3593 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3594 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3595 enable_symvers=no
3596 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3597 : All interesting versions of Sun ld support sun style symbol versioning.
3598 elif test $with_gnu_ld != yes ; then
3599 # just fail for now
3600 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3601 AC_MSG_WARN([=== you are not using the GNU linker.])
3602 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3603 enable_symvers=no
3604 elif test $glibcxx_ld_is_gold = yes ; then
3605 : All versions of gold support symbol versioning.
3606 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3607 # The right tools, the right setup, but too old. Fallbacks?
3608 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3609 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3610 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3611 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3612 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3613 enable_symvers=no
3614 fi
3615 fi
3617 # For libtool versioning info, format is CURRENT:REVISION:AGE
3618 libtool_VERSION=6:22:0
3620 # Everything parsed; figure out what files and settings to use.
3621 case $enable_symvers in
3622 no)
3623 SYMVER_FILE=config/abi/pre/none.ver
3624 ;;
3625 gnu)
3626 SYMVER_FILE=config/abi/pre/gnu.ver
3627 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3628 [Define to use GNU versioning in the shared library.])
3629 ;;
3630 gnu-versioned-namespace)
3631 libtool_VERSION=7:0:0
3632 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3633 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3634 [Define to use GNU namespace versioning in the shared library.])
3635 ;;
3636 darwin)
3637 SYMVER_FILE=config/abi/pre/gnu.ver
3638 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3639 [Define to use darwin versioning in the shared library.])
3640 ;;
3641 sun)
3642 SYMVER_FILE=config/abi/pre/gnu.ver
3643 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3644 [Define to use Sun versioning in the shared library.])
3645 ;;
3646 esac
3648 if test x$enable_symvers != xno ; then
3649 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3650 [Define to use symbol versioning in the shared library.])
3651 fi
3653 AC_CACHE_CHECK([whether the target supports .symver directive],
3654 glibcxx_cv_have_as_symver_directive, [
3655 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3656 [], glibcxx_cv_have_as_symver_directive=yes,
3657 glibcxx_cv_have_as_symver_directive=no)])
3658 if test $glibcxx_cv_have_as_symver_directive = yes; then
3659 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3660 [Define to 1 if the target assembler supports .symver directive.])
3661 fi
3663 AC_SUBST(SYMVER_FILE)
3664 AC_SUBST(port_specific_symbol_files)
3665 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3666 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3667 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3668 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3669 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3670 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3672 if test $enable_symvers != no ; then
3673 case ${target_os} in
3674 # The Solaris 2 runtime linker doesn't support the GNU extension of
3675 # binding the same symbol to different versions
3676 solaris2*)
3677 ;;
3678 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3679 *)
3680 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3681 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3682 ;;
3683 esac
3684 fi
3686 # Now, set up compatibility support, if any.
3687 # In addition, need this to deal with std::size_t mangling in
3688 # src/compatibility.cc. In a perfect world, could use
3689 # typeid(std::size_t).name()[0] to do direct substitution.
3690 AC_MSG_CHECKING([for size_t as unsigned int])
3691 ac_save_CFLAGS="$CFLAGS"
3692 CFLAGS="-Werror"
3693 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3694 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3695 CFLAGS=$ac_save_CFLAGS
3696 if test "$glibcxx_size_t_is_i" = yes; then
3697 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3698 fi
3699 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3701 AC_MSG_CHECKING([for ptrdiff_t as int])
3702 ac_save_CFLAGS="$CFLAGS"
3703 CFLAGS="-Werror"
3704 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3705 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3706 CFLAGS=$ac_save_CFLAGS
3707 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3708 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3709 fi
3710 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3711 ])
3714 dnl
3715 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3716 dnl We must stage the required headers so that they will be installed
3717 dnl with the library (unlike libgcc, the STL implementation is provided
3718 dnl solely within headers). Since we must not inject random user-space
3719 dnl macro names into user-provided C++ code, we first stage into <file>-in
3720 dnl and process to <file> with an output command. The reason for a two-
3721 dnl stage process here is to correctly handle $srcdir!=$objdir without
3722 dnl having to write complex code (the sed commands to clean the macro
3723 dnl namespace are complex and fragile enough as it is). We must also
3724 dnl add a relative path so that -I- is supported properly.
3725 dnl
3726 dnl Substs:
3727 dnl thread_header
3728 dnl
3729 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3730 AC_MSG_CHECKING([for thread model used by GCC])
3731 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3732 AC_MSG_RESULT([$target_thread_file])
3733 GCC_AC_THREAD_HEADER([$target_thread_file])
3734 ])
3737 dnl
3738 dnl Check if gthread implementation defines the types and functions
3739 dnl required by the c++0x thread library. Conforming gthread
3740 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3741 dnl
3742 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3743 dnl
3744 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3745 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3747 if test x$enable_libstdcxx_threads = xauto ||
3748 test x$enable_libstdcxx_threads = xyes; then
3750 AC_LANG_SAVE
3751 AC_LANG_CPLUSPLUS
3753 ac_save_CXXFLAGS="$CXXFLAGS"
3754 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3755 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3757 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3758 case $target_thread_file in
3759 posix)
3760 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3761 esac
3763 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3765 AC_TRY_COMPILE([#include <unistd.h>],
3766 [
3767 // In case of POSIX threads check _POSIX_TIMEOUTS.
3768 #if (defined(_PTHREADS) \
3769 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3770 #error
3771 #endif
3772 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3774 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3775 [Define to 1 if mutex_timedlock is available.])
3777 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3778 else res_mutex_timedlock=no ; fi
3779 AC_MSG_RESULT([$res_mutex_timedlock])
3781 AC_MSG_CHECKING([for gthreads library])
3783 AC_TRY_COMPILE([#include "gthr.h"],
3784 [
3785 #ifndef __GTHREADS_CXX0X
3786 #error
3787 #endif
3788 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3789 else
3790 ac_has_gthreads=no
3791 fi
3793 AC_MSG_RESULT([$ac_has_gthreads])
3795 if test x"$ac_has_gthreads" = x"yes"; then
3796 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3797 [Define if gthreads library is available.])
3799 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
3800 AC_CHECK_TYPE([pthread_rwlock_t],
3801 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
3802 [Define if POSIX read/write locks are available in <gthr.h>.])],
3803 [],
3804 [#include "gthr.h"])
3805 fi
3807 CXXFLAGS="$ac_save_CXXFLAGS"
3808 AC_LANG_RESTORE
3809 ])
3812 # Check whether LC_MESSAGES is available in <locale.h>.
3813 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3814 #
3815 # This file file be copied and used freely without restrictions. It can
3816 # be used in projects which are not available under the GNU Public License
3817 # but which still want to provide support for the GNU gettext functionality.
3818 # Please note that the actual code is *not* freely available.
3819 AC_DEFUN([AC_LC_MESSAGES], [
3820 AC_CHECK_HEADER(locale.h, [
3821 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3822 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3823 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3824 if test $ac_cv_val_LC_MESSAGES = yes; then
3825 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3826 [Define if LC_MESSAGES is available in <locale.h>.])
3827 fi
3828 ])
3829 ])
3831 dnl
3832 dnl Check whether rdrand is supported in the assembler.
3833 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3834 AC_MSG_CHECKING([for rdrand support in assembler])
3835 AC_CACHE_VAL(ac_cv_x86_rdrand, [
3836 ac_cv_x86_rdrand=no
3837 case "$target" in
3838 i?86-*-* | \
3839 x86_64-*-*)
3840 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3841 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3842 esac
3843 ])
3844 if test $ac_cv_x86_rdrand = yes; then
3845 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3846 [ Defined if as can handle rdrand. ])
3847 fi
3848 AC_MSG_RESULT($ac_cv_x86_rdrand)
3849 ])
3851 dnl
3852 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3853 dnl
3854 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3856 AC_LANG_SAVE
3857 AC_LANG_CPLUSPLUS
3858 ac_save_CXXFLAGS="$CXXFLAGS"
3859 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3861 AC_MSG_CHECKING([for get_nprocs])
3862 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3863 GCC_TRY_COMPILE_OR_LINK(
3864 [#include <sys/sysinfo.h>],
3865 [int n = get_nprocs();],
3866 [glibcxx_cv_GET_NPROCS=yes],
3867 [glibcxx_cv_GET_NPROCS=no])
3868 ])
3869 if test $glibcxx_cv_GET_NPROCS = yes; then
3870 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3871 fi
3872 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3874 CXXFLAGS="$ac_save_CXXFLAGS"
3875 AC_LANG_RESTORE
3876 ])
3878 dnl
3879 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3880 dnl
3881 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3883 AC_LANG_SAVE
3884 AC_LANG_CPLUSPLUS
3885 ac_save_CXXFLAGS="$CXXFLAGS"
3886 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3888 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3889 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3890 GCC_TRY_COMPILE_OR_LINK(
3891 [#include <unistd.h>],
3892 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3893 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3894 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3895 ])
3896 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3897 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3898 fi
3899 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3901 CXXFLAGS="$ac_save_CXXFLAGS"
3902 AC_LANG_RESTORE
3903 ])
3905 dnl
3906 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
3907 dnl
3908 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
3910 AC_LANG_SAVE
3911 AC_LANG_CPLUSPLUS
3912 ac_save_CXXFLAGS="$CXXFLAGS"
3913 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3915 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
3916 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
3917 GCC_TRY_COMPILE_OR_LINK(
3918 [#include <unistd.h>],
3919 [int n = sysconf(_SC_NPROC_ONLN);],
3920 [glibcxx_cv_SC_NPROC_ONLN=yes],
3921 [glibcxx_cv_SC_NPROC_ONLN=no])
3922 ])
3923 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
3924 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
3925 fi
3926 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
3928 CXXFLAGS="$ac_save_CXXFLAGS"
3929 AC_LANG_RESTORE
3930 ])
3932 dnl
3933 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
3934 dnl
3935 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
3937 AC_LANG_SAVE
3938 AC_LANG_CPLUSPLUS
3939 ac_save_CXXFLAGS="$CXXFLAGS"
3940 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3942 AC_MSG_CHECKING([for pthreads_num_processors_np])
3943 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
3944 GCC_TRY_COMPILE_OR_LINK(
3945 [#include <pthread.h>],
3946 [int n = pthread_num_processors_np();],
3947 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
3948 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
3949 ])
3950 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
3951 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
3952 fi
3953 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
3955 CXXFLAGS="$ac_save_CXXFLAGS"
3956 AC_LANG_RESTORE
3957 ])
3959 dnl
3960 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
3961 dnl
3962 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
3964 AC_LANG_SAVE
3965 AC_LANG_CPLUSPLUS
3966 ac_save_CXXFLAGS="$CXXFLAGS"
3967 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3969 AC_MSG_CHECKING([for hw.ncpu sysctl])
3970 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
3971 GCC_TRY_COMPILE_OR_LINK(
3972 [
3973 #include <stddef.h>
3974 #include <sys/sysctl.h>
3975 ],
3976 [
3977 int count;
3978 size_t size = sizeof(count);
3979 int mib[] = { CTL_HW, HW_NCPU };
3980 sysctl(mib, 2, &count, &size, NULL, 0);
3981 ],
3982 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
3983 [glibcxx_cv_SYSCTL_HW_NCPU=no])
3984 ])
3985 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
3986 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
3987 fi
3988 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
3990 CXXFLAGS="$ac_save_CXXFLAGS"
3991 AC_LANG_RESTORE
3992 ])
3994 dnl
3995 dnl Check to see if python pretty printing can be activated.
3996 dnl
3997 dnl --with-python-dir=dir
3998 dnl installs directory into $prefix/dir
3999 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4001 AC_MSG_CHECKING([for custom python install directory])
4002 AC_ARG_WITH([python-dir],
4003 AS_HELP_STRING([--with-python-dir],
4004 [the location to install Python modules. This path is relative starting from the prefix.]),
4005 [with_python_dir=$withval], [with_python_dir="no"])
4006 AC_MSG_RESULT(${with_python_dir})
4008 # Needed for installing Python modules during make install.
4009 python_mod_dir="${with_python_dir}"
4010 AC_SUBST(python_mod_dir)
4011 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4012 ])
4014 dnl
4015 dnl Check to see if -Werror is disabled.
4016 dnl
4017 dnl --enable-werror/--disable-werror
4018 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4019 AC_MSG_CHECKING([for -Werror])
4020 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4021 AC_MSG_RESULT($enable_werror)
4022 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4023 ])
4025 dnl
4026 dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4027 dnl and define _GLIBCXX_USE_TMPNAM.
4028 dnl
4029 AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4030 dnl
4031 AC_LANG_SAVE
4032 AC_LANG_CPLUSPLUS
4033 ac_save_CXXFLAGS="$CXXFLAGS"
4034 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4035 dnl
4036 AC_MSG_CHECKING([for tmpnam])
4037 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
4038 GCC_TRY_COMPILE_OR_LINK(
4039 [#include <stdio.h>],
4040 [char *tmp = tmpnam(NULL);],
4041 [glibcxx_cv_TMPNAM=yes],
4042 [glibcxx_cv_TMPNAM=no])
4043 ])
4044 if test $glibcxx_cv_TMPNAM = yes; then
4045 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4046 fi
4047 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
4048 dnl
4049 CXXFLAGS="$ac_save_CXXFLAGS"
4050 AC_LANG_RESTORE
4051 ])
4053 dnl
4054 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4055 dnl Some versions of sdt.h were not compatible with C++11.
4056 dnl
4057 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
4058 AC_MSG_CHECKING([for suitable sys/sdt.h])
4059 # Note that this test has to be run with the C language.
4060 # Otherwise, sdt.h will try to include some headers from
4061 # libstdc++ itself.
4062 AC_LANG_SAVE
4063 AC_LANG_C
4064 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
4065 # Because we have to run the test in C, we use grep rather
4066 # than the compiler to check for the bug. The bug is that
4067 # were strings without trailing whitespace, causing g++
4068 # to look for operator"". The pattern searches for the fixed
4069 # output.
4070 AC_EGREP_CPP([ \",\" ], [
4071 #include <sys/sdt.h>
4072 int f() { STAP_PROBE(hi, bob); }
4073 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4074 ])
4075 AC_LANG_RESTORE
4076 if test $glibcxx_cv_sys_sdt_h = yes; then
4077 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4078 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4079 fi
4080 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
4081 ])
4083 dnl
4084 dnl Control whether the library should define symbols for old and new ABIs.
4085 dnl This affects definitions of strings, stringstreams and locale facets.
4086 dnl
4087 dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
4088 dnl
4089 dnl Defines:
4090 dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
4091 dnl
4092 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4093 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
4094 if test x$enable_symvers = xgnu-versioned-namespace; then
4095 # gnu-versioned-namespace is incompatible with the dual ABI.
4096 enable_libstdcxx_dual_abi="no"
4097 fi
4098 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4099 AC_MSG_NOTICE([dual ABI is disabled])
4100 default_libstdcxx_abi="gcc4-compatible"
4101 fi
4102 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
4103 ])
4105 dnl
4106 dnl Check to see which ABI should be enabled by default.
4107 dnl
4108 dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
4109 dnl
4110 dnl Defines:
4111 dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4112 dnl
4113 AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4114 if test x$enable_libstdcxx_dual_abi = xyes; then
4115 AC_MSG_CHECKING([for default std::string ABI to use])
4116 AC_ARG_WITH([default-libstdcxx-abi],
4117 AS_HELP_STRING([--with-default-libstdcxx-abi],
4118 [set the std::string ABI to use by default]),
4119 [case "$withval" in
4120 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4121 new|cxx11) default_libstdcxx_abi="new" ;;
4122 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4123 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4124 esac
4125 ],
4126 [default_libstdcxx_abi="new"])
4127 AC_MSG_RESULT(${default_libstdcxx_abi})
4128 fi
4129 if test $default_libstdcxx_abi = "new"; then
4130 glibcxx_cxx11_abi=1
4131 glibcxx_cxx98_abi=0
4132 else
4133 glibcxx_cxx11_abi=0
4134 glibcxx_cxx98_abi=1
4135 fi
4136 AC_SUBST(glibcxx_cxx98_abi)
4137 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4138 ])
4140 dnl
4141 dnl Check to see whether to build libstdc++fs.a
4142 dnl
4143 dnl --enable-libstdcxx-filesystem-ts
4144 dnl
4145 AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4146 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4147 [turns on ISO/IEC TS 18822 support],
4148 [permit yes|no|auto])
4150 AC_MSG_CHECKING([whether to build Filesystem TS support])
4151 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4152 enable_libstdcxx_filesystem_ts=no
4153 fi
4154 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4155 case "${target_os}" in
4156 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4157 enable_libstdcxx_filesystem_ts=yes
4158 ;;
4159 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
4160 enable_libstdcxx_filesystem_ts=yes
4161 ;;
4162 solaris*)
4163 enable_libstdcxx_filesystem_ts=yes
4164 ;;
4165 *)
4166 enable_libstdcxx_filesystem_ts=no
4167 ;;
4168 esac
4169 fi
4170 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4171 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4172 ])
4174 dnl
4175 dnl Check whether the library calls required by the Filesystem TS are present
4176 dnl and define _GLIBCXX_USE_REALPATH and _GLIBCXX_USE_UTIMENSAT.
4177 dnl
4178 AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4179 dnl
4180 AC_LANG_SAVE
4181 AC_LANG_CPLUSPLUS
4182 ac_save_CXXFLAGS="$CXXFLAGS"
4183 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4184 dnl
4185 AC_MSG_CHECKING([for struct dirent.d_type])
4186 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
4187 GCC_TRY_COMPILE_OR_LINK(
4188 [#include <dirent.h>],
4189 [
4190 struct dirent d;
4191 if (sizeof d.d_type) return 0;
4192 ],
4193 [glibcxx_cv_dirent_d_type=yes],
4194 [glibcxx_cv_dirent_d_type=no])
4195 ])
4196 if test $glibcxx_cv_dirent_d_type = yes; then
4197 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
4198 fi
4199 AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
4200 dnl
4201 AC_MSG_CHECKING([for realpath])
4202 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
4203 GCC_TRY_COMPILE_OR_LINK(
4204 [
4205 #include <stdlib.h>
4206 #include <unistd.h>
4207 ],
4208 [
4209 #if _XOPEN_VERSION < 500
4210 #error
4211 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4212 char *tmp = realpath((const char*)NULL, (char*)NULL);
4213 #else
4214 #error
4215 #endif
4216 ],
4217 [glibcxx_cv_realpath=yes],
4218 [glibcxx_cv_realpath=no])
4219 ])
4220 if test $glibcxx_cv_realpath = yes; then
4221 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
4222 fi
4223 AC_MSG_RESULT($glibcxx_cv_realpath)
4224 dnl
4225 AC_MSG_CHECKING([for utimensat])
4226 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl
4227 GCC_TRY_COMPILE_OR_LINK(
4228 [
4229 #include <fcntl.h>
4230 #include <sys/stat.h>
4231 ],
4232 [
4233 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4234 int i = utimensat(AT_FDCWD, "path", ts, 0);
4235 ],
4236 [glibcxx_cv_utimensat=yes],
4237 [glibcxx_cv_utimensat=no])
4238 ])
4239 if test $glibcxx_cv_utimensat = yes; then
4240 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4241 fi
4242 AC_MSG_RESULT($glibcxx_cv_utimensat)
4243 dnl
4244 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec])
4245 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl
4246 GCC_TRY_COMPILE_OR_LINK(
4247 [ #include <sys/stat.h> ],
4248 [
4249 struct stat st;
4250 return st.st_mtim.tv_nsec;
4251 ],
4252 [glibcxx_cv_st_mtim=yes],
4253 [glibcxx_cv_st_mtim=no])
4254 ])
4255 if test $glibcxx_cv_st_mtim = yes; then
4256 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4257 fi
4258 AC_MSG_RESULT($glibcxx_cv_st_mtim)
4259 dnl
4260 AC_MSG_CHECKING([for fchmod])
4261 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl
4262 GCC_TRY_COMPILE_OR_LINK(
4263 [#include <sys/stat.h>],
4264 [fchmod(1, S_IWUSR);],
4265 [glibcxx_cv_fchmod=yes],
4266 [glibcxx_cv_fchmod=no])
4267 ])
4268 if test $glibcxx_cv_fchmod = yes; then
4269 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4270 fi
4271 AC_MSG_RESULT($glibcxx_cv_fchmod)
4272 dnl
4273 AC_MSG_CHECKING([for fchmodat])
4274 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl
4275 GCC_TRY_COMPILE_OR_LINK(
4276 [
4277 #include <fcntl.h>
4278 #include <sys/stat.h>
4279 ],
4280 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4281 [glibcxx_cv_fchmodat=yes],
4282 [glibcxx_cv_fchmodat=no])
4283 ])
4284 if test $glibcxx_cv_fchmodat = yes; then
4285 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4286 fi
4287 AC_MSG_RESULT($glibcxx_cv_fchmodat)
4288 dnl
4289 AC_MSG_CHECKING([for sendfile that can copy files])
4290 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl
4291 case "${target_os}" in
4292 gnu* | linux* | solaris*)
4293 GCC_TRY_COMPILE_OR_LINK(
4294 [#include <sys/sendfile.h>],
4295 [sendfile(1, 2, (off_t*)NULL, sizeof 1);],
4296 [glibcxx_cv_sendfile=yes],
4297 [glibcxx_cv_sendfile=no])
4298 ;;
4299 *)
4300 glibcxx_cv_sendfile=no
4301 ;;
4302 esac
4303 ])
4304 if test $glibcxx_cv_sendfile = yes; then
4305 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/stat.h>.])
4306 fi
4307 AC_MSG_RESULT($glibcxx_cv_sendfile)
4308 dnl
4309 CXXFLAGS="$ac_save_CXXFLAGS"
4310 AC_LANG_RESTORE
4311 ])
4313 # Macros from the top-level gcc directory.
4314 m4_include([../config/gc++filt.m4])
4315 m4_include([../config/tls.m4])
4316 m4_include([../config/gthr.m4])