| blob | 2d066701aece05e6ef41420c4552a7532867079e |
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 *-*-*gnu* | *-*-aix* | *-*-hpux*)
2190 # If <math.h> defines the obsolete isinf(double) and isnan(double)
2191 # functions (instead of or as well as the C99 generic macros) then we
2192 # can't define std::isinf(double) and std::isnan(double) in <cmath>
2193 # and must use the ones from <math.h> instead.
2194 AC_MSG_CHECKING([for obsolete isinf function in <math.h>])
2195 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf, [
2196 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2197 [#include <math.h>
2198 #undef isinf
2199 namespace std {
2200 using ::isinf;
2201 bool isinf(float);
2202 bool isinf(long double);
2203 }
2204 using std::isinf;
2205 bool b = isinf(0.0);
2206 ])],
2207 [glibcxx_cv_obsolete_isinf=yes],
2208 [glibcxx_cv_obsolete_isinf=no]
2209 )])
2210 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf])
2211 if test $glibcxx_cv_obsolete_isinf = yes; then
2212 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1,
2213 [Define if <math.h> defines obsolete isinf function.])
2214 fi
2216 AC_MSG_CHECKING([for obsolete isnan function in <math.h>])
2217 AC_CACHE_VAL(glibcxx_cv_obsolete_isnan, [
2218 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2219 [#include <math.h>
2220 #undef isnan
2221 namespace std {
2222 using ::isnan;
2223 bool isnan(float);
2224 bool isnan(long double);
2225 }
2226 using std::isnan;
2227 bool b = isnan(0.0);
2228 ])],
2229 [glibcxx_cv_obsolete_isnan=yes],
2230 [glibcxx_cv_obsolete_isnan=no]
2231 )])
2232 AC_MSG_RESULT([$glibcxx_cv_obsolete_isnan])
2233 if test $glibcxx_cv_obsolete_isnan = yes; then
2234 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1,
2235 [Define if <math.h> defines obsolete isnan function.])
2236 fi
2237 ;;
2238 esac
2240 CXXFLAGS="$ac_save_CXXFLAGS"
2241 AC_LANG_RESTORE
2242 ])
2244 dnl
2245 dnl Check whether macros, etc are present for <system_error>
2246 dnl
2247 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
2249 m4_pushdef([n_syserr], [1])dnl
2250 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
2251 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
2252 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
2253 ECHILD, ENOSPC, EPERM,
2254 ETIMEDOUT, EWOULDBLOCK],
2255 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
2256 AC_MSG_CHECKING([for syserr])
2257 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
2258 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
2259 [int i = syserr;])],
2260 [glibcxx_cv_system_error[]n_syserr=yes],
2261 [glibcxx_cv_system_error[]n_syserr=no])
2262 ])
2263 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
2264 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
2265 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
2266 fi
2267 m4_define([n_syserr], m4_incr(n_syserr))dnl
2268 m4_popdef([SYSERR])dnl
2269 ])
2270 m4_popdef([n_syserr])dnl
2271 ])
2273 dnl
2274 dnl Check for what type of C headers to use.
2275 dnl
2276 dnl --enable-cheaders= [does stuff].
2277 dnl --disable-cheaders [does not do anything, really].
2278 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
2279 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
2280 dnl
2281 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
2282 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
2283 [construct "C" headers for g++], [permit c|c_std|c_global])
2284 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2286 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2288 # Allow overrides to configure.host here.
2289 if test $enable_cheaders = c_global; then
2290 c_compatibility=yes
2291 fi
2293 AC_SUBST(C_INCLUDE_DIR)
2294 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2295 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
2296 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
2297 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
2298 ])
2301 dnl
2302 dnl Check for which locale library to use. The choice is mapped to
2303 dnl a subdirectory of config/locale.
2304 dnl
2305 dnl Default is generic.
2306 dnl
2307 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
2308 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
2309 [use MODEL for target locale package],
2310 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
2312 # Deal with gettext issues. Default to not using it (=no) until we detect
2313 # support for it later. Let the user turn it off via --e/d, but let that
2314 # default to on for easier handling.
2315 USE_NLS=no
2316 AC_ARG_ENABLE(nls,
2317 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2318 [],
2319 [enable_nls=yes])
2321 # Either a known package, or "auto"
2322 if test $enable_clocale = no || test $enable_clocale = yes; then
2323 enable_clocale=auto
2324 fi
2325 enable_clocale_flag=$enable_clocale
2327 # Probe for locale model to use if none specified.
2328 # Default to "generic".
2329 if test $enable_clocale_flag = auto; then
2330 case ${target_os} in
2331 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2332 enable_clocale_flag=gnu
2333 ;;
2334 darwin*)
2335 enable_clocale_flag=darwin
2336 ;;
2337 dragonfly* | freebsd*)
2338 enable_clocale_flag=dragonfly
2339 ;;
2340 openbsd*)
2341 enable_clocale_flag=newlib
2342 ;;
2343 *)
2344 if test x"$with_newlib" = x"yes"; then
2345 enable_clocale_flag=newlib
2346 else
2347 enable_clocale_flag=generic
2348 fi
2349 ;;
2350 esac
2351 fi
2353 # Sanity check model, and test for special functionality.
2354 if test $enable_clocale_flag = gnu; then
2355 AC_EGREP_CPP([_GLIBCXX_ok], [
2356 #include <features.h>
2357 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
2358 _GLIBCXX_ok
2359 #endif
2360 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2362 # Set it to scream when it hurts.
2363 ac_save_CFLAGS="$CFLAGS"
2364 CFLAGS="-Wimplicit-function-declaration -Werror"
2366 # Use strxfrm_l if available.
2367 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2368 #include <string.h>
2369 #include <locale.h>],
2370 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2371 AC_DEFINE(HAVE_STRXFRM_L, 1,
2372 [Define if strxfrm_l is available in <string.h>.]),)
2374 # Use strerror_l if available.
2375 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2376 #include <string.h>
2377 #include <locale.h>],
2378 [__locale_t loc; strerror_l(5, loc);],
2379 AC_DEFINE(HAVE_STRERROR_L, 1,
2380 [Define if strerror_l is available in <string.h>.]),)
2382 CFLAGS="$ac_save_CFLAGS"
2383 fi
2385 # Perhaps use strerror_r if available, and strerror_l isn't.
2386 ac_save_CFLAGS="$CFLAGS"
2387 CFLAGS="-Wimplicit-function-declaration -Werror"
2388 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2389 #include <string.h>
2390 #include <locale.h>],
2391 [char s[128]; strerror_r(5, s, 128);],
2392 AC_DEFINE(HAVE_STRERROR_R, 1,
2393 [Define if strerror_r is available in <string.h>.]),)
2394 CFLAGS="$ac_save_CFLAGS"
2396 # Set configure bits for specified locale package
2397 AC_MSG_CHECKING([for C locale to use])
2398 case ${enable_clocale_flag} in
2399 generic)
2400 AC_MSG_RESULT(generic)
2402 CLOCALE_H=config/locale/generic/c_locale.h
2403 CLOCALE_CC=config/locale/generic/c_locale.cc
2404 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2405 CCOLLATE_CC=config/locale/generic/collate_members.cc
2406 CCTYPE_CC=config/locale/generic/ctype_members.cc
2407 CMESSAGES_H=config/locale/generic/messages_members.h
2408 CMESSAGES_CC=config/locale/generic/messages_members.cc
2409 CMONEY_CC=config/locale/generic/monetary_members.cc
2410 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2411 CTIME_H=config/locale/generic/time_members.h
2412 CTIME_CC=config/locale/generic/time_members.cc
2413 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2414 ;;
2415 darwin)
2416 AC_MSG_RESULT(darwin)
2418 CLOCALE_H=config/locale/generic/c_locale.h
2419 CLOCALE_CC=config/locale/generic/c_locale.cc
2420 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2421 CCOLLATE_CC=config/locale/generic/collate_members.cc
2422 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2423 CMESSAGES_H=config/locale/generic/messages_members.h
2424 CMESSAGES_CC=config/locale/generic/messages_members.cc
2425 CMONEY_CC=config/locale/generic/monetary_members.cc
2426 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2427 CTIME_H=config/locale/generic/time_members.h
2428 CTIME_CC=config/locale/generic/time_members.cc
2429 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2430 ;;
2432 dragonfly)
2433 AC_MSG_RESULT(dragonfly or freebsd)
2435 CLOCALE_H=config/locale/dragonfly/c_locale.h
2436 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
2437 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2438 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
2439 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2440 CMESSAGES_H=config/locale/generic/messages_members.h
2441 CMESSAGES_CC=config/locale/generic/messages_members.cc
2442 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2443 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2444 CTIME_H=config/locale/dragonfly/time_members.h
2445 CTIME_CC=config/locale/dragonfly/time_members.cc
2446 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2447 ;;
2449 gnu)
2450 AC_MSG_RESULT(gnu)
2452 # Declare intention to use gettext, and add support for specific
2453 # languages.
2454 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2455 ALL_LINGUAS="de fr"
2457 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2458 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2459 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2460 USE_NLS=yes
2461 fi
2462 # Export the build objects.
2463 for ling in $ALL_LINGUAS; do \
2464 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2465 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2466 done
2467 AC_SUBST(glibcxx_MOFILES)
2468 AC_SUBST(glibcxx_POFILES)
2470 CLOCALE_H=config/locale/gnu/c_locale.h
2471 CLOCALE_CC=config/locale/gnu/c_locale.cc
2472 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2473 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2474 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2475 CMESSAGES_H=config/locale/gnu/messages_members.h
2476 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2477 CMONEY_CC=config/locale/gnu/monetary_members.cc
2478 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2479 CTIME_H=config/locale/gnu/time_members.h
2480 CTIME_CC=config/locale/gnu/time_members.cc
2481 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2482 ;;
2483 ieee_1003.1-2001)
2484 AC_MSG_RESULT(IEEE 1003.1)
2486 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2487 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2488 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2489 CCOLLATE_CC=config/locale/generic/collate_members.cc
2490 CCTYPE_CC=config/locale/generic/ctype_members.cc
2491 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2492 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2493 CMONEY_CC=config/locale/generic/monetary_members.cc
2494 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2495 CTIME_H=config/locale/generic/time_members.h
2496 CTIME_CC=config/locale/generic/time_members.cc
2497 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2498 ;;
2499 newlib)
2500 AC_MSG_RESULT(newlib)
2502 CLOCALE_H=config/locale/generic/c_locale.h
2503 CLOCALE_CC=config/locale/generic/c_locale.cc
2504 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2505 CCOLLATE_CC=config/locale/generic/collate_members.cc
2506 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2507 CMESSAGES_H=config/locale/generic/messages_members.h
2508 CMESSAGES_CC=config/locale/generic/messages_members.cc
2509 CMONEY_CC=config/locale/generic/monetary_members.cc
2510 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2511 CTIME_H=config/locale/generic/time_members.h
2512 CTIME_CC=config/locale/generic/time_members.cc
2513 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2514 ;;
2515 esac
2517 # This is where the testsuite looks for locale catalogs, using the
2518 # -DLOCALEDIR define during testsuite compilation.
2519 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2520 AC_SUBST(glibcxx_localedir)
2522 # A standalone libintl (e.g., GNU libintl) may be in use.
2523 if test $USE_NLS = yes; then
2524 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2525 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2526 fi
2527 if test $USE_NLS = yes; then
2528 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2529 [Define if NLS translations are to be used.])
2530 fi
2532 AC_SUBST(USE_NLS)
2533 AC_SUBST(CLOCALE_H)
2534 AC_SUBST(CMESSAGES_H)
2535 AC_SUBST(CCODECVT_CC)
2536 AC_SUBST(CCOLLATE_CC)
2537 AC_SUBST(CCTYPE_CC)
2538 AC_SUBST(CMESSAGES_CC)
2539 AC_SUBST(CMONEY_CC)
2540 AC_SUBST(CNUMERIC_CC)
2541 AC_SUBST(CTIME_H)
2542 AC_SUBST(CTIME_CC)
2543 AC_SUBST(CLOCALE_CC)
2544 AC_SUBST(CLOCALE_INTERNAL_H)
2545 ])
2548 dnl
2549 dnl Check for which std::allocator base class to use. The choice is
2550 dnl mapped from a subdirectory of include/ext.
2551 dnl
2552 dnl Default is new.
2553 dnl
2554 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2555 AC_MSG_CHECKING([for std::allocator base class])
2556 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2557 [use KIND for target std::allocator base],
2558 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2560 # If they didn't use this option switch, or if they specified --enable
2561 # with no specific model, we'll have to look for one. If they
2562 # specified --disable (???), do likewise.
2563 if test $enable_libstdcxx_allocator = no ||
2564 test $enable_libstdcxx_allocator = yes;
2565 then
2566 enable_libstdcxx_allocator=auto
2567 fi
2569 # Either a known package, or "auto". Auto implies the default choice
2570 # for a particular platform.
2571 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2573 # Probe for host-specific support if no specific model is specified.
2574 # Default to "new".
2575 if test $enable_libstdcxx_allocator_flag = auto; then
2576 case ${target_os} in
2577 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2578 enable_libstdcxx_allocator_flag=new
2579 ;;
2580 *)
2581 enable_libstdcxx_allocator_flag=new
2582 ;;
2583 esac
2584 fi
2585 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2588 # Set configure bits for specified locale package
2589 case ${enable_libstdcxx_allocator_flag} in
2590 bitmap)
2591 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2592 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2593 ;;
2594 malloc)
2595 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2596 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2597 ;;
2598 mt)
2599 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2600 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2601 ;;
2602 new)
2603 ALLOCATOR_H=config/allocator/new_allocator_base.h
2604 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2605 ;;
2606 pool)
2607 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2608 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2609 ;;
2610 esac
2612 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW,
2613 test $enable_libstdcxx_allocator_flag = new)
2614 AC_SUBST(ALLOCATOR_H)
2615 AC_SUBST(ALLOCATOR_NAME)
2616 ])
2619 dnl
2620 dnl Check for whether the Boost-derived checks should be turned on.
2621 dnl
2622 dnl --enable-concept-checks turns them on.
2623 dnl --disable-concept-checks leaves them off.
2624 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2625 dnl Where DEFAULT is either `yes' or `no'.
2626 dnl
2627 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2628 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2629 if test $enable_concept_checks = yes; then
2630 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2631 [Define to use concept checking code from the boost libraries.])
2632 fi
2633 ])
2635 dnl
2636 dnl Use extern templates.
2637 dnl
2638 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2639 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2641 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2642 dnl Where DEFAULT is `yes' or `no'.
2643 dnl
2644 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2646 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2648 AC_MSG_CHECKING([for extern template support])
2649 AC_MSG_RESULT([$enable_extern_template])
2651 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2652 ])
2654 dnl
2655 dnl Use vtable verification.
2656 dnl
2657 dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2658 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2660 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2661 dnl Where DEFAULT is `yes' or `no'.
2662 dnl
2663 AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2665 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2667 AC_MSG_CHECKING([for vtable verify support])
2668 AC_MSG_RESULT([$enable_vtable_verify])
2670 vtv_cygmin=no
2671 if test $enable_vtable_verify = yes; then
2672 case ${target_os} in
2673 cygwin*|mingw32*)
2674 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2675 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2676 vtv_cygmin=yes
2677 ;;
2678 darwin*)
2679 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2680 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2681 ;;
2682 solaris2*)
2683 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2684 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2685 ;;
2686 *)
2687 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2688 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2689 ;;
2690 esac
2691 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2692 else
2693 VTV_CXXFLAGS=
2694 VTV_PCH_CXXFLAGS=
2695 VTV_CXXLINKFLAGS=
2696 fi
2698 AC_SUBST(VTV_CXXFLAGS)
2699 AC_SUBST(VTV_PCH_CXXFLAGS)
2700 AC_SUBST(VTV_CXXLINKFLAGS)
2701 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2702 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2703 ])
2705 dnl
2706 dnl Check for parallel mode pre-requisites, including OpenMP support.
2707 dnl
2708 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2709 dnl
2710 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2712 enable_parallel=no;
2714 # See if configured libgomp/omp.h exists. (libgomp may be in
2715 # noconfigdirs but not explicitly disabled.)
2716 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2717 enable_parallel=yes;
2718 else
2719 AC_MSG_NOTICE([target-libgomp not built])
2720 fi
2722 AC_MSG_CHECKING([for parallel mode support])
2723 AC_MSG_RESULT([$enable_parallel])
2724 ])
2727 dnl
2728 dnl Check for which I/O library to use: stdio, or something specific.
2729 dnl
2730 dnl Default is stdio.
2731 dnl
2732 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2733 AC_MSG_CHECKING([for underlying I/O to use])
2734 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2735 [use target-specific I/O package], [permit stdio])
2737 # Now that libio has been removed, you can have any color you want as long
2738 # as it's black. This is one big no-op until other packages are added, but
2739 # showing the framework never hurts.
2740 case ${enable_cstdio} in
2741 stdio)
2742 CSTDIO_H=config/io/c_io_stdio.h
2743 BASIC_FILE_H=config/io/basic_file_stdio.h
2744 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2745 AC_MSG_RESULT(stdio)
2746 ;;
2747 esac
2749 AC_SUBST(CSTDIO_H)
2750 AC_SUBST(BASIC_FILE_H)
2751 AC_SUBST(BASIC_FILE_CC)
2752 ])
2755 dnl
2756 dnl Check for "unusual" flags to pass to the compiler while building.
2757 dnl
2758 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2759 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2760 dnl --disable-cxx-flags passes nothing.
2761 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2762 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2763 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2764 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2765 dnl If "default flags" is an empty string, the effect is the same
2766 dnl as --disable or --enable=no.
2767 dnl
2768 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2769 AC_MSG_CHECKING([for extra compiler flags for building])
2770 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2771 [pass compiler FLAGS when building library],
2772 [case "x$enable_cxx_flags" in
2773 xno | x) enable_cxx_flags= ;;
2774 x-*) ;;
2775 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2776 esac])
2778 # Run through flags (either default or command-line) and set anything
2779 # extra (e.g., #defines) that must accompany particular g++ options.
2780 if test -n "$enable_cxx_flags"; then
2781 for f in $enable_cxx_flags; do
2782 case "$f" in
2783 -fhonor-std) ;;
2784 -*) ;;
2785 *) # and we're trying to pass /what/ exactly?
2786 AC_MSG_ERROR([compiler flags start with a -]) ;;
2787 esac
2788 done
2789 fi
2791 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2792 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2793 AC_SUBST(EXTRA_CXX_FLAGS)
2794 ])
2797 dnl
2798 dnl Check to see if debugging libraries are to be built.
2799 dnl
2800 dnl --enable-libstdcxx-debug
2801 dnl builds a separate set of debugging libraries in addition to the
2802 dnl normal (shared, static) libstdc++ binaries.
2803 dnl
2804 dnl --disable-libstdcxx-debug
2805 dnl builds only one (non-debug) version of libstdc++.
2806 dnl
2807 dnl --enable-libstdcxx-debug-flags=FLAGS
2808 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2809 dnl
2810 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2811 dnl Where DEFAULT is either `yes' or `no'.
2812 dnl
2813 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2814 AC_MSG_CHECKING([for additional debug build])
2815 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2816 AC_MSG_RESULT($enable_libstdcxx_debug)
2817 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2818 ])
2821 dnl
2822 dnl Check for explicit debug flags.
2823 dnl
2824 dnl --enable-libstdcxx-debug-flags='-O1'
2825 dnl is a general method for passing flags to be used when
2826 dnl building debug libraries with --enable-libstdcxx-debug.
2827 dnl
2828 dnl --disable-libstdcxx-debug-flags does nothing.
2829 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2830 dnl If "default flags" is an empty string, the effect is the same
2831 dnl as --disable or --enable=no.
2832 dnl
2833 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2834 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2835 [pass compiler FLAGS when building debug library],
2836 [case "x$enable_libstdcxx_debug_flags" in
2837 xno | x) enable_libstdcxx_debug_flags= ;;
2838 x-*) ;;
2839 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2840 esac])
2842 # Option parsed, now set things appropriately
2843 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2844 AC_SUBST(DEBUG_FLAGS)
2846 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2847 ])
2850 dnl
2851 dnl Check if the user only wants a freestanding library implementation.
2852 dnl
2853 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2854 dnl installing only the headers required by [17.4.1.3] and the language
2855 dnl support library. More than that will be built (to keep the Makefiles
2856 dnl conveniently clean), but not installed.
2857 dnl
2858 dnl Sets:
2859 dnl is_hosted (yes/no)
2860 dnl
2861 dnl Defines:
2862 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2863 dnl
2864 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2865 AC_ARG_ENABLE([hosted-libstdcxx],
2866 AC_HELP_STRING([--disable-hosted-libstdcxx],
2867 [only build freestanding C++ runtime support]),,
2868 [case "$host" in
2869 arm*-*-symbianelf*)
2870 enable_hosted_libstdcxx=no
2871 ;;
2872 *)
2873 enable_hosted_libstdcxx=yes
2874 ;;
2875 esac])
2876 if test "$enable_hosted_libstdcxx" = no; then
2877 AC_MSG_NOTICE([Only freestanding libraries will be built])
2878 is_hosted=no
2879 hosted_define=0
2880 enable_abi_check=no
2881 enable_libstdcxx_pch=no
2882 else
2883 is_hosted=yes
2884 hosted_define=1
2885 fi
2886 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2887 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2888 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2889 ])
2892 dnl
2893 dnl Check if the user wants a non-verbose library implementation.
2894 dnl
2895 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2896 dnl standard error on termination.
2897 dnl
2898 dnl Defines:
2899 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2900 dnl
2901 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2902 AC_ARG_ENABLE([libstdcxx-verbose],
2903 AC_HELP_STRING([--disable-libstdcxx-verbose],
2904 [disable termination messages to standard error]),,
2905 [enable_libstdcxx_verbose=yes])
2906 if test x"$enable_libstdcxx_verbose" = xyes; then
2907 verbose_define=1
2908 else
2909 AC_MSG_NOTICE([verbose termination messages are disabled])
2910 verbose_define=0
2911 fi
2912 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
2913 [Define to 1 if a verbose library is built, or 0 otherwise.])
2914 ])
2917 dnl
2918 dnl Check for template specializations for the 'long long' type.
2919 dnl The result determines only whether 'long long' I/O is enabled; things
2920 dnl like numeric_limits<> specializations are always available.
2921 dnl
2922 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2923 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2924 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2925 dnl Where DEFAULT is either `yes' or `no'.
2926 dnl
2927 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2928 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2929 if test $enable_long_long = yes; then
2930 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2931 [Define if code specialized for long long should be used.])
2932 fi
2933 AC_MSG_CHECKING([for enabled long long specializations])
2934 AC_MSG_RESULT([$enable_long_long])
2935 ])
2938 dnl
2939 dnl Check for decimal floating point.
2940 dnl See:
2941 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2942 dnl
2943 dnl This checks to see if the host supports decimal floating point types.
2944 dnl
2945 dnl Defines:
2946 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2947 dnl
2948 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2950 # Fake what AC_TRY_COMPILE does, without linking as this is
2951 # unnecessary for this test.
2953 cat > conftest.$ac_ext << EOF
2954 [#]line __oline__ "configure"
2955 int main()
2956 {
2957 _Decimal32 d1;
2958 _Decimal64 d2;
2959 _Decimal128 d3;
2960 return 0;
2961 }
2962 EOF
2964 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2965 if AC_TRY_EVAL(ac_compile); then
2966 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2967 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2968 enable_dfp=yes
2969 else
2970 enable_dfp=no
2971 fi
2972 AC_MSG_RESULT($enable_dfp)
2973 rm -f conftest*
2974 ])
2976 dnl
2977 dnl Check for GNU 128-bit integer and floating point types.
2978 dnl
2979 dnl Note: also checks that the types aren't standard types.
2980 dnl
2981 dnl Defines:
2982 dnl _GLIBCXX_USE_INT128
2983 dnl _GLIBCXX_USE_FLOAT128
2984 dnl
2985 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
2987 AC_LANG_SAVE
2988 AC_LANG_CPLUSPLUS
2990 # Fake what AC_TRY_COMPILE does, without linking as this is
2991 # unnecessary for this test.
2993 cat > conftest.$ac_ext << EOF
2994 [#]line __oline__ "configure"
2995 template<typename T1, typename T2>
2996 struct same
2997 { typedef T2 type; };
2999 template<typename T>
3000 struct same<T, T>;
3002 int main()
3003 {
3004 typename same<long, __int128>::type i1;
3005 typename same<long long, __int128>::type i2;
3006 }
3007 EOF
3009 AC_MSG_CHECKING([for __int128])
3010 if AC_TRY_EVAL(ac_compile); then
3011 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
3012 [Define if __int128 is supported on this host.])
3013 enable_int128=yes
3014 else
3015 enable_int128=no
3016 fi
3017 AC_MSG_RESULT($enable_int128)
3018 rm -f conftest*
3020 cat > conftest.$ac_ext << EOF
3021 [#]line __oline__ "configure"
3022 template<typename T1, typename T2>
3023 struct same
3024 { typedef T2 type; };
3026 template<typename T>
3027 struct same<T, T>;
3029 int main()
3030 {
3031 typename same<double, __float128>::type f1;
3032 typename same<long double, __float128>::type f2;
3033 }
3034 EOF
3036 AC_MSG_CHECKING([for __float128])
3037 if AC_TRY_EVAL(ac_compile); then
3038 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
3039 [Define if __float128 is supported on this host.])
3040 enable_float128=yes
3041 else
3042 enable_float128=no
3043 fi
3044 AC_MSG_RESULT($enable_float128)
3045 rm -f conftest*
3047 AC_LANG_RESTORE
3048 ])
3050 dnl
3051 dnl Check for template specializations for the 'wchar_t' type.
3052 dnl
3053 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3054 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3055 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3056 dnl Where DEFAULT is either `yes' or `no'.
3057 dnl
3058 dnl Necessary support must also be present.
3059 dnl
3060 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3061 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
3063 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3064 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3065 AC_MSG_CHECKING([for mbstate_t])
3066 AC_TRY_COMPILE([#include <wchar.h>],
3067 [mbstate_t teststate;],
3068 have_mbstate_t=yes, have_mbstate_t=no)
3069 AC_MSG_RESULT($have_mbstate_t)
3070 if test x"$have_mbstate_t" = xyes; then
3071 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3072 fi
3074 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3075 # ac_has_wchar_h.
3076 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
3078 if test x"$enable_wchar_t" = x"yes"; then
3080 AC_LANG_SAVE
3081 AC_LANG_CPLUSPLUS
3083 if test x"$ac_has_wchar_h" = xyes &&
3084 test x"$ac_has_wctype_h" = xyes; then
3085 AC_TRY_COMPILE([#include <wchar.h>
3086 #include <stddef.h>
3087 wint_t i;
3088 long l = WEOF;
3089 long j = WCHAR_MIN;
3090 long k = WCHAR_MAX;
3091 namespace test
3092 {
3093 using ::btowc;
3094 using ::fgetwc;
3095 using ::fgetws;
3096 using ::fputwc;
3097 using ::fputws;
3098 using ::fwide;
3099 using ::fwprintf;
3100 using ::fwscanf;
3101 using ::getwc;
3102 using ::getwchar;
3103 using ::mbrlen;
3104 using ::mbrtowc;
3105 using ::mbsinit;
3106 using ::mbsrtowcs;
3107 using ::putwc;
3108 using ::putwchar;
3109 using ::swprintf;
3110 using ::swscanf;
3111 using ::ungetwc;
3112 using ::vfwprintf;
3113 using ::vswprintf;
3114 using ::vwprintf;
3115 using ::wcrtomb;
3116 using ::wcscat;
3117 using ::wcschr;
3118 using ::wcscmp;
3119 using ::wcscoll;
3120 using ::wcscpy;
3121 using ::wcscspn;
3122 using ::wcsftime;
3123 using ::wcslen;
3124 using ::wcsncat;
3125 using ::wcsncmp;
3126 using ::wcsncpy;
3127 using ::wcspbrk;
3128 using ::wcsrchr;
3129 using ::wcsrtombs;
3130 using ::wcsspn;
3131 using ::wcsstr;
3132 using ::wcstod;
3133 using ::wcstok;
3134 using ::wcstol;
3135 using ::wcstoul;
3136 using ::wcsxfrm;
3137 using ::wctob;
3138 using ::wmemchr;
3139 using ::wmemcmp;
3140 using ::wmemcpy;
3141 using ::wmemmove;
3142 using ::wmemset;
3143 using ::wprintf;
3144 using ::wscanf;
3145 }
3146 ],[],[], [enable_wchar_t=no])
3147 else
3148 enable_wchar_t=no
3149 fi
3151 AC_LANG_RESTORE
3152 fi
3154 if test x"$enable_wchar_t" = x"yes"; then
3155 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
3156 [Define if code specialized for wchar_t should be used.])
3157 fi
3159 AC_MSG_CHECKING([for enabled wchar_t specializations])
3160 AC_MSG_RESULT([$enable_wchar_t])
3161 ])
3164 dnl
3165 dnl Check to see if building and using a C++ precompiled header can be done.
3166 dnl
3167 dnl --enable-libstdcxx-pch=yes
3168 dnl default, this shows intent to use stdc++.h.gch If it looks like it
3169 dnl may work, after some light-hearted attempts to puzzle out compiler
3170 dnl support, flip bits on in include/Makefile.am
3171 dnl
3172 dnl --disable-libstdcxx-pch
3173 dnl turns off attempts to use or build stdc++.h.gch.
3174 dnl
3175 dnl Substs:
3176 dnl glibcxx_PCHFLAGS
3177 dnl
3178 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
3179 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
3180 if test $enable_libstdcxx_pch = yes; then
3181 AC_CACHE_CHECK([for compiler with PCH support],
3182 [glibcxx_cv_prog_CXX_pch],
3183 [ac_save_CXXFLAGS="$CXXFLAGS"
3184 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3185 AC_LANG_SAVE
3186 AC_LANG_CPLUSPLUS
3187 echo '#include <math.h>' > conftest.h
3188 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
3189 -o conftest.h.gch 1>&5 2>&1 &&
3190 echo '#error "pch failed"' > conftest.h &&
3191 echo '#include "conftest.h"' > conftest.cc &&
3192 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3193 then
3194 glibcxx_cv_prog_CXX_pch=yes
3195 else
3196 glibcxx_cv_prog_CXX_pch=no
3197 fi
3198 rm -f conftest*
3199 CXXFLAGS=$ac_save_CXXFLAGS
3200 AC_LANG_RESTORE
3201 ])
3202 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
3203 fi
3205 AC_MSG_CHECKING([for enabled PCH])
3206 AC_MSG_RESULT([$enable_libstdcxx_pch])
3208 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
3209 if test $enable_libstdcxx_pch = yes; then
3210 glibcxx_PCHFLAGS="-include bits/stdc++.h"
3211 else
3212 glibcxx_PCHFLAGS=""
3213 fi
3214 AC_SUBST(glibcxx_PCHFLAGS)
3215 ])
3218 dnl
3219 dnl Check for atomic builtins.
3220 dnl See:
3221 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
3222 dnl
3223 dnl This checks to see if the host supports the compiler-generated
3224 dnl builtins for atomic operations for various integral sizes. Note, this
3225 dnl is intended to be an all-or-nothing switch, so all the atomic operations
3226 dnl that are used should be checked.
3227 dnl
3228 dnl Note:
3229 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
3230 dnl
3231 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
3232 AC_LANG_SAVE
3233 AC_LANG_CPLUSPLUS
3234 old_CXXFLAGS="$CXXFLAGS"
3236 # Do link tests if possible, instead asm tests, limited to some platforms
3237 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3238 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3239 atomic_builtins_link_tests=no
3240 if test x$gcc_no_link != xyes; then
3241 # Can do link tests. Limit to some tested platforms
3242 case "$host" in
3243 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3244 atomic_builtins_link_tests=yes
3245 ;;
3246 esac
3247 fi
3249 if test x$atomic_builtins_link_tests = xyes; then
3251 # Do link tests.
3253 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3255 AC_MSG_CHECKING([for atomic builtins for bool])
3256 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
3257 AC_TRY_LINK(
3258 [ ],
3259 [typedef bool atomic_type;
3260 atomic_type c1;
3261 atomic_type c2;
3262 atomic_type c3(0);
3263 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3264 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3265 __ATOMIC_RELAXED);
3266 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3267 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3268 ],
3269 [glibcxx_cv_atomic_bool=yes],
3270 [glibcxx_cv_atomic_bool=no])
3271 ])
3272 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3274 AC_MSG_CHECKING([for atomic builtins for short])
3275 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
3276 AC_TRY_LINK(
3277 [ ],
3278 [typedef short atomic_type;
3279 atomic_type c1;
3280 atomic_type c2;
3281 atomic_type c3(0);
3282 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3283 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3284 __ATOMIC_RELAXED);
3285 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3286 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3287 ],
3288 [glibcxx_cv_atomic_short=yes],
3289 [glibcxx_cv_atomic_short=no])
3290 ])
3291 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3293 AC_MSG_CHECKING([for atomic builtins for int])
3294 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
3295 AC_TRY_LINK(
3296 [ ],
3297 [typedef int atomic_type;
3298 atomic_type c1;
3299 atomic_type c2;
3300 atomic_type c3(0);
3301 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3302 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3303 __ATOMIC_RELAXED);
3304 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3305 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3306 ],
3307 [glibcxx_cv_atomic_int=yes],
3308 [glibcxx_cv_atomic_int=no])
3309 ])
3310 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3312 AC_MSG_CHECKING([for atomic builtins for long long])
3313 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
3314 AC_TRY_LINK(
3315 [ ],
3316 [typedef long long atomic_type;
3317 atomic_type c1;
3318 atomic_type c2;
3319 atomic_type c3(0);
3320 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3321 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3322 __ATOMIC_RELAXED);
3323 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3324 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3325 ],
3326 [glibcxx_cv_atomic_long_long=yes],
3327 [glibcxx_cv_atomic_long_long=no])
3328 ])
3329 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3331 else
3333 # Do asm tests.
3335 # Compile unoptimized.
3336 CXXFLAGS='-O0 -S'
3338 # Fake what AC_TRY_COMPILE does.
3340 cat > conftest.$ac_ext << EOF
3341 [#]line __oline__ "configure"
3342 int main()
3343 {
3344 typedef bool atomic_type;
3345 atomic_type c1;
3346 atomic_type c2;
3347 atomic_type c3(0);
3348 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3349 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3350 __ATOMIC_RELAXED);
3351 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3352 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3354 return 0;
3355 }
3356 EOF
3358 AC_MSG_CHECKING([for atomic builtins for bool])
3359 if AC_TRY_EVAL(ac_compile); then
3360 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3361 glibcxx_cv_atomic_bool=no
3362 else
3363 glibcxx_cv_atomic_bool=yes
3364 fi
3365 fi
3366 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3367 rm -f conftest*
3369 cat > conftest.$ac_ext << EOF
3370 [#]line __oline__ "configure"
3371 int main()
3372 {
3373 typedef short atomic_type;
3374 atomic_type c1;
3375 atomic_type c2;
3376 atomic_type c3(0);
3377 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3378 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3379 __ATOMIC_RELAXED);
3380 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3381 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3383 return 0;
3384 }
3385 EOF
3387 AC_MSG_CHECKING([for atomic builtins for short])
3388 if AC_TRY_EVAL(ac_compile); then
3389 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3390 glibcxx_cv_atomic_short=no
3391 else
3392 glibcxx_cv_atomic_short=yes
3393 fi
3394 fi
3395 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3396 rm -f conftest*
3398 cat > conftest.$ac_ext << EOF
3399 [#]line __oline__ "configure"
3400 int main()
3401 {
3402 // NB: _Atomic_word not necessarily int.
3403 typedef int atomic_type;
3404 atomic_type c1;
3405 atomic_type c2;
3406 atomic_type c3(0);
3407 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3408 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3409 __ATOMIC_RELAXED);
3410 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3411 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3413 return 0;
3414 }
3415 EOF
3417 AC_MSG_CHECKING([for atomic builtins for int])
3418 if AC_TRY_EVAL(ac_compile); then
3419 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3420 glibcxx_cv_atomic_int=no
3421 else
3422 glibcxx_cv_atomic_int=yes
3423 fi
3424 fi
3425 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3426 rm -f conftest*
3428 cat > conftest.$ac_ext << EOF
3429 [#]line __oline__ "configure"
3430 int main()
3431 {
3432 typedef long long atomic_type;
3433 atomic_type c1;
3434 atomic_type c2;
3435 atomic_type c3(0);
3436 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3437 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3438 __ATOMIC_RELAXED);
3439 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3440 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3442 return 0;
3443 }
3444 EOF
3446 AC_MSG_CHECKING([for atomic builtins for long long])
3447 if AC_TRY_EVAL(ac_compile); then
3448 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3449 glibcxx_cv_atomic_long_long=no
3450 else
3451 glibcxx_cv_atomic_long_long=yes
3452 fi
3453 fi
3454 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3455 rm -f conftest*
3457 fi
3459 CXXFLAGS="$old_CXXFLAGS"
3460 AC_LANG_RESTORE
3462 # Set atomicity_dir to builtins if all but the long long test above passes.
3463 if test "$glibcxx_cv_atomic_bool" = yes \
3464 && test "$glibcxx_cv_atomic_short" = yes \
3465 && test "$glibcxx_cv_atomic_int" = yes; then
3466 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3467 [Define if the compiler supports C++11 atomics.])
3468 atomicity_dir=cpu/generic/atomicity_builtins
3469 fi
3471 # If still generic, set to mutex.
3472 if test $atomicity_dir = "cpu/generic" ; then
3473 atomicity_dir=cpu/generic/atomicity_mutex
3474 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3475 if test "x$target_thread_file" = xsingle; then
3476 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3477 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3478 else
3479 AC_MSG_WARN([They will be faked using a mutex.])
3480 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3481 fi
3482 fi
3484 ])
3487 dnl
3488 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3489 dnl
3490 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3491 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3492 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3493 dnl Where DEFAULT is 'yes'.
3494 dnl
3495 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3496 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3498 if test x$enable_libstdcxx_visibility = xyes ; then
3499 dnl all hail libgfortran
3500 dnl Check whether the target supports hidden visibility.
3501 AC_CACHE_CHECK([whether the target supports hidden visibility],
3502 glibcxx_cv_have_attribute_visibility, [
3503 save_CFLAGS="$CFLAGS"
3504 CFLAGS="$CFLAGS -Werror"
3505 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3506 [], glibcxx_cv_have_attribute_visibility=yes,
3507 glibcxx_cv_have_attribute_visibility=no)
3508 CFLAGS="$save_CFLAGS"])
3509 if test $glibcxx_cv_have_attribute_visibility = no; then
3510 enable_libstdcxx_visibility=no
3511 fi
3512 fi
3514 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3515 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3516 ])
3519 dnl
3520 dnl Add version tags to symbols in shared library (or not), additionally
3521 dnl marking other symbols as private/local (or not).
3522 dnl
3523 dnl Sets libtool_VERSION, and determines shared library SONAME.
3524 dnl
3525 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3526 dnl
3527 dnl --enable-symvers=style adds a version script to the linker call when
3528 dnl creating the shared library. The choice of version script is
3529 dnl controlled by 'style'.
3530 dnl --disable-symvers does not.
3531 dnl
3532 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3533 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3534 dnl choose a default style based on linker characteristics. Passing
3535 dnl 'no' disables versioning.
3536 dnl
3537 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3539 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3540 [enables symbol versioning of the shared library],
3541 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3543 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3544 # don't know enough about $LD to do tricks...
3545 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3546 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3547 # with extern "C++" in version scripts.
3548 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3550 # Turn a 'yes' into a suitable default.
3551 if test x$enable_symvers = xyes ; then
3552 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3553 enable_symvers=no
3554 else
3555 if test $with_gnu_ld = yes ; then
3556 case ${target_os} in
3557 hpux*)
3558 enable_symvers=no ;;
3559 *)
3560 enable_symvers=gnu ;;
3561 esac
3562 else
3563 case ${target_os} in
3564 darwin*)
3565 enable_symvers=darwin ;;
3566 # Sun symbol versioning exists since Solaris 2.5.
3567 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3568 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3569 # version scripts, so disable symbol versioning if none can be
3570 # found.
3571 if test -z "$ac_cv_path_CXXFILT"; then
3572 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3573 AC_MSG_WARN([=== no GNU c++filt could be found.])
3574 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3575 enable_symvers=no
3576 else
3577 enable_symvers=sun
3578 fi
3579 ;;
3580 *)
3581 enable_symvers=no ;;
3582 esac
3583 fi
3584 fi
3585 fi
3587 # Check to see if 'darwin' or 'darwin-export' can win.
3588 if test x$enable_symvers = xdarwin-export ; then
3589 enable_symvers=darwin
3590 fi
3592 # Check if 'sun' was requested on non-Solaris 2 platforms.
3593 if test x$enable_symvers = xsun ; then
3594 case ${target_os} in
3595 solaris2*)
3596 # All fine.
3597 ;;
3598 *)
3599 # Unlikely to work.
3600 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3601 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3602 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3603 enable_symvers=no
3604 ;;
3605 esac
3606 fi
3608 # Check to see if 'gnu' can win.
3609 if test $enable_symvers = gnu ||
3610 test $enable_symvers = gnu-versioned-namespace ||
3611 test $enable_symvers = sun; then
3612 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3613 AC_MSG_CHECKING([for shared libgcc])
3614 ac_save_CFLAGS="$CFLAGS"
3615 CFLAGS=' -lgcc_s'
3616 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3617 CFLAGS="$ac_save_CFLAGS"
3618 if test $glibcxx_shared_libgcc = no; then
3619 cat > conftest.c <<EOF
3620 int main (void) { return 0; }
3621 EOF
3622 changequote(,)dnl
3623 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3624 -shared -shared-libgcc -o conftest.so \
3625 conftest.c -v 2>&1 >/dev/null \
3626 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3627 changequote([,])dnl
3628 rm -f conftest.c conftest.so
3629 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3630 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3631 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3632 CFLAGS="$ac_save_CFLAGS"
3633 fi
3634 fi
3635 AC_MSG_RESULT($glibcxx_shared_libgcc)
3637 # For GNU ld, we need at least this version. The format is described in
3638 # GLIBCXX_CHECK_LINKER_FEATURES above.
3639 glibcxx_min_gnu_ld_version=21400
3641 # If no shared libgcc, can't win.
3642 if test $glibcxx_shared_libgcc != yes; then
3643 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3644 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3645 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3646 enable_symvers=no
3647 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3648 : All interesting versions of Sun ld support sun style symbol versioning.
3649 elif test $with_gnu_ld != yes ; then
3650 # just fail for now
3651 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3652 AC_MSG_WARN([=== you are not using the GNU linker.])
3653 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3654 enable_symvers=no
3655 elif test $glibcxx_ld_is_gold = yes ; then
3656 : All versions of gold support symbol versioning.
3657 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3658 # The right tools, the right setup, but too old. Fallbacks?
3659 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3660 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3661 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3662 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3663 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3664 enable_symvers=no
3665 fi
3666 fi
3668 # For libtool versioning info, format is CURRENT:REVISION:AGE
3669 libtool_VERSION=6:22:0
3671 # Everything parsed; figure out what files and settings to use.
3672 case $enable_symvers in
3673 no)
3674 SYMVER_FILE=config/abi/pre/none.ver
3675 ;;
3676 gnu)
3677 SYMVER_FILE=config/abi/pre/gnu.ver
3678 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3679 [Define to use GNU versioning in the shared library.])
3680 ;;
3681 gnu-versioned-namespace)
3682 libtool_VERSION=7:0:0
3683 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3684 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3685 [Define to use GNU namespace versioning in the shared library.])
3686 ;;
3687 darwin)
3688 SYMVER_FILE=config/abi/pre/gnu.ver
3689 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3690 [Define to use darwin versioning in the shared library.])
3691 ;;
3692 sun)
3693 SYMVER_FILE=config/abi/pre/gnu.ver
3694 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3695 [Define to use Sun versioning in the shared library.])
3696 ;;
3697 esac
3699 if test x$enable_symvers != xno ; then
3700 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3701 [Define to use symbol versioning in the shared library.])
3702 fi
3704 AC_CACHE_CHECK([whether the target supports .symver directive],
3705 glibcxx_cv_have_as_symver_directive, [
3706 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3707 [], glibcxx_cv_have_as_symver_directive=yes,
3708 glibcxx_cv_have_as_symver_directive=no)])
3709 if test $glibcxx_cv_have_as_symver_directive = yes; then
3710 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3711 [Define to 1 if the target assembler supports .symver directive.])
3712 fi
3714 AC_SUBST(SYMVER_FILE)
3715 AC_SUBST(port_specific_symbol_files)
3716 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3717 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3718 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3719 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3720 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3721 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3723 if test $enable_symvers != no ; then
3724 case ${target_os} in
3725 # The Solaris 2 runtime linker doesn't support the GNU extension of
3726 # binding the same symbol to different versions
3727 solaris2*)
3728 ;;
3729 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3730 *)
3731 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3732 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3733 ;;
3734 esac
3735 fi
3737 # Now, set up compatibility support, if any.
3738 # In addition, need this to deal with std::size_t mangling in
3739 # src/compatibility.cc. In a perfect world, could use
3740 # typeid(std::size_t).name()[0] to do direct substitution.
3741 AC_MSG_CHECKING([for size_t as unsigned int])
3742 ac_save_CFLAGS="$CFLAGS"
3743 CFLAGS="-Werror"
3744 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3745 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3746 CFLAGS=$ac_save_CFLAGS
3747 if test "$glibcxx_size_t_is_i" = yes; then
3748 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3749 fi
3750 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3752 AC_MSG_CHECKING([for ptrdiff_t as int])
3753 ac_save_CFLAGS="$CFLAGS"
3754 CFLAGS="-Werror"
3755 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3756 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3757 CFLAGS=$ac_save_CFLAGS
3758 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3759 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3760 fi
3761 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3762 ])
3765 dnl
3766 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3767 dnl We must stage the required headers so that they will be installed
3768 dnl with the library (unlike libgcc, the STL implementation is provided
3769 dnl solely within headers). Since we must not inject random user-space
3770 dnl macro names into user-provided C++ code, we first stage into <file>-in
3771 dnl and process to <file> with an output command. The reason for a two-
3772 dnl stage process here is to correctly handle $srcdir!=$objdir without
3773 dnl having to write complex code (the sed commands to clean the macro
3774 dnl namespace are complex and fragile enough as it is). We must also
3775 dnl add a relative path so that -I- is supported properly.
3776 dnl
3777 dnl Substs:
3778 dnl thread_header
3779 dnl
3780 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3781 AC_MSG_CHECKING([for thread model used by GCC])
3782 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3783 AC_MSG_RESULT([$target_thread_file])
3784 GCC_AC_THREAD_HEADER([$target_thread_file])
3785 ])
3788 dnl
3789 dnl Check if gthread implementation defines the types and functions
3790 dnl required by the c++0x thread library. Conforming gthread
3791 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3792 dnl
3793 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3794 dnl
3795 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3796 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3798 if test x$enable_libstdcxx_threads = xauto ||
3799 test x$enable_libstdcxx_threads = xyes; then
3801 AC_LANG_SAVE
3802 AC_LANG_CPLUSPLUS
3804 ac_save_CXXFLAGS="$CXXFLAGS"
3805 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3806 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3808 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3809 case $target_thread_file in
3810 posix)
3811 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3812 esac
3814 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3816 AC_TRY_COMPILE([#include <unistd.h>],
3817 [
3818 // In case of POSIX threads check _POSIX_TIMEOUTS.
3819 #if (defined(_PTHREADS) \
3820 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3821 #error
3822 #endif
3823 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3825 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3826 [Define to 1 if mutex_timedlock is available.])
3828 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3829 else res_mutex_timedlock=no ; fi
3830 AC_MSG_RESULT([$res_mutex_timedlock])
3832 AC_MSG_CHECKING([for gthreads library])
3834 AC_TRY_COMPILE([#include "gthr.h"],
3835 [
3836 #ifndef __GTHREADS_CXX0X
3837 #error
3838 #endif
3839 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3840 else
3841 ac_has_gthreads=no
3842 fi
3844 AC_MSG_RESULT([$ac_has_gthreads])
3846 if test x"$ac_has_gthreads" = x"yes"; then
3847 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3848 [Define if gthreads library is available.])
3850 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
3851 AC_CHECK_TYPE([pthread_rwlock_t],
3852 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
3853 [Define if POSIX read/write locks are available in <gthr.h>.])],
3854 [],
3855 [#include "gthr.h"])
3856 fi
3858 CXXFLAGS="$ac_save_CXXFLAGS"
3859 AC_LANG_RESTORE
3860 ])
3863 # Check whether LC_MESSAGES is available in <locale.h>.
3864 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3865 #
3866 # This file file be copied and used freely without restrictions. It can
3867 # be used in projects which are not available under the GNU Public License
3868 # but which still want to provide support for the GNU gettext functionality.
3869 # Please note that the actual code is *not* freely available.
3870 AC_DEFUN([AC_LC_MESSAGES], [
3871 AC_CHECK_HEADER(locale.h, [
3872 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3873 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3874 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3875 if test $ac_cv_val_LC_MESSAGES = yes; then
3876 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3877 [Define if LC_MESSAGES is available in <locale.h>.])
3878 fi
3879 ])
3880 ])
3882 dnl
3883 dnl Check whether rdrand is supported in the assembler.
3884 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3885 AC_MSG_CHECKING([for rdrand support in assembler])
3886 AC_CACHE_VAL(ac_cv_x86_rdrand, [
3887 ac_cv_x86_rdrand=no
3888 case "$target" in
3889 i?86-*-* | \
3890 x86_64-*-*)
3891 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3892 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3893 esac
3894 ])
3895 if test $ac_cv_x86_rdrand = yes; then
3896 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3897 [ Defined if as can handle rdrand. ])
3898 fi
3899 AC_MSG_RESULT($ac_cv_x86_rdrand)
3900 ])
3902 dnl
3903 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3904 dnl
3905 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3907 AC_LANG_SAVE
3908 AC_LANG_CPLUSPLUS
3909 ac_save_CXXFLAGS="$CXXFLAGS"
3910 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3912 AC_MSG_CHECKING([for get_nprocs])
3913 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3914 GCC_TRY_COMPILE_OR_LINK(
3915 [#include <sys/sysinfo.h>],
3916 [int n = get_nprocs();],
3917 [glibcxx_cv_GET_NPROCS=yes],
3918 [glibcxx_cv_GET_NPROCS=no])
3919 ])
3920 if test $glibcxx_cv_GET_NPROCS = yes; then
3921 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3922 fi
3923 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3925 CXXFLAGS="$ac_save_CXXFLAGS"
3926 AC_LANG_RESTORE
3927 ])
3929 dnl
3930 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3931 dnl
3932 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3934 AC_LANG_SAVE
3935 AC_LANG_CPLUSPLUS
3936 ac_save_CXXFLAGS="$CXXFLAGS"
3937 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3939 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3940 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3941 GCC_TRY_COMPILE_OR_LINK(
3942 [#include <unistd.h>],
3943 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3944 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3945 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3946 ])
3947 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3948 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3949 fi
3950 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3952 CXXFLAGS="$ac_save_CXXFLAGS"
3953 AC_LANG_RESTORE
3954 ])
3956 dnl
3957 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
3958 dnl
3959 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
3961 AC_LANG_SAVE
3962 AC_LANG_CPLUSPLUS
3963 ac_save_CXXFLAGS="$CXXFLAGS"
3964 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3966 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
3967 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
3968 GCC_TRY_COMPILE_OR_LINK(
3969 [#include <unistd.h>],
3970 [int n = sysconf(_SC_NPROC_ONLN);],
3971 [glibcxx_cv_SC_NPROC_ONLN=yes],
3972 [glibcxx_cv_SC_NPROC_ONLN=no])
3973 ])
3974 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
3975 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
3976 fi
3977 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
3979 CXXFLAGS="$ac_save_CXXFLAGS"
3980 AC_LANG_RESTORE
3981 ])
3983 dnl
3984 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
3985 dnl
3986 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
3988 AC_LANG_SAVE
3989 AC_LANG_CPLUSPLUS
3990 ac_save_CXXFLAGS="$CXXFLAGS"
3991 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3993 AC_MSG_CHECKING([for pthreads_num_processors_np])
3994 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
3995 GCC_TRY_COMPILE_OR_LINK(
3996 [#include <pthread.h>],
3997 [int n = pthread_num_processors_np();],
3998 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
3999 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
4000 ])
4001 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
4002 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
4003 fi
4004 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
4006 CXXFLAGS="$ac_save_CXXFLAGS"
4007 AC_LANG_RESTORE
4008 ])
4010 dnl
4011 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
4012 dnl
4013 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
4015 AC_LANG_SAVE
4016 AC_LANG_CPLUSPLUS
4017 ac_save_CXXFLAGS="$CXXFLAGS"
4018 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4020 AC_MSG_CHECKING([for hw.ncpu sysctl])
4021 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
4022 GCC_TRY_COMPILE_OR_LINK(
4023 [
4024 #include <stddef.h>
4025 #include <sys/sysctl.h>
4026 ],
4027 [
4028 int count;
4029 size_t size = sizeof(count);
4030 int mib[] = { CTL_HW, HW_NCPU };
4031 sysctl(mib, 2, &count, &size, NULL, 0);
4032 ],
4033 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
4034 [glibcxx_cv_SYSCTL_HW_NCPU=no])
4035 ])
4036 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
4037 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
4038 fi
4039 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
4041 CXXFLAGS="$ac_save_CXXFLAGS"
4042 AC_LANG_RESTORE
4043 ])
4045 dnl
4046 dnl Check to see if python pretty printing can be activated.
4047 dnl
4048 dnl --with-python-dir=dir
4049 dnl installs directory into $prefix/dir
4050 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4052 AC_MSG_CHECKING([for custom python install directory])
4053 AC_ARG_WITH([python-dir],
4054 AS_HELP_STRING([--with-python-dir],
4055 [the location to install Python modules. This path is relative starting from the prefix.]),
4056 [with_python_dir=$withval], [with_python_dir="no"])
4057 AC_MSG_RESULT(${with_python_dir})
4059 # Needed for installing Python modules during make install.
4060 python_mod_dir="${with_python_dir}"
4061 AC_SUBST(python_mod_dir)
4062 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4063 ])
4065 dnl
4066 dnl Check to see if -Werror is disabled.
4067 dnl
4068 dnl --enable-werror/--disable-werror
4069 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4070 AC_MSG_CHECKING([for -Werror])
4071 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4072 AC_MSG_RESULT($enable_werror)
4073 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4074 ])
4076 dnl
4077 dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4078 dnl and define _GLIBCXX_USE_TMPNAM.
4079 dnl
4080 AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4081 dnl
4082 AC_LANG_SAVE
4083 AC_LANG_CPLUSPLUS
4084 ac_save_CXXFLAGS="$CXXFLAGS"
4085 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4086 dnl
4087 AC_MSG_CHECKING([for tmpnam])
4088 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
4089 GCC_TRY_COMPILE_OR_LINK(
4090 [#include <stdio.h>],
4091 [char *tmp = tmpnam(NULL);],
4092 [glibcxx_cv_TMPNAM=yes],
4093 [glibcxx_cv_TMPNAM=no])
4094 ])
4095 if test $glibcxx_cv_TMPNAM = yes; then
4096 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4097 fi
4098 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
4099 dnl
4100 CXXFLAGS="$ac_save_CXXFLAGS"
4101 AC_LANG_RESTORE
4102 ])
4104 dnl
4105 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4106 dnl Some versions of sdt.h were not compatible with C++11.
4107 dnl
4108 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
4109 AC_MSG_CHECKING([for suitable sys/sdt.h])
4110 # Note that this test has to be run with the C language.
4111 # Otherwise, sdt.h will try to include some headers from
4112 # libstdc++ itself.
4113 AC_LANG_SAVE
4114 AC_LANG_C
4115 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
4116 # Because we have to run the test in C, we use grep rather
4117 # than the compiler to check for the bug. The bug is that
4118 # were strings without trailing whitespace, causing g++
4119 # to look for operator"". The pattern searches for the fixed
4120 # output.
4121 AC_EGREP_CPP([ \",\" ], [
4122 #include <sys/sdt.h>
4123 int f() { STAP_PROBE(hi, bob); }
4124 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4125 ])
4126 AC_LANG_RESTORE
4127 if test $glibcxx_cv_sys_sdt_h = yes; then
4128 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4129 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4130 fi
4131 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
4132 ])
4134 dnl
4135 dnl Control whether the library should define symbols for old and new ABIs.
4136 dnl This affects definitions of strings, stringstreams and locale facets.
4137 dnl
4138 dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
4139 dnl
4140 dnl Defines:
4141 dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
4142 dnl
4143 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4144 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
4145 if test x$enable_symvers = xgnu-versioned-namespace; then
4146 # gnu-versioned-namespace is incompatible with the dual ABI.
4147 enable_libstdcxx_dual_abi="no"
4148 fi
4149 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4150 AC_MSG_NOTICE([dual ABI is disabled])
4151 default_libstdcxx_abi="gcc4-compatible"
4152 fi
4153 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
4154 ])
4156 dnl
4157 dnl Check to see which ABI should be enabled by default.
4158 dnl
4159 dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
4160 dnl
4161 dnl Defines:
4162 dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4163 dnl
4164 AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4165 if test x$enable_libstdcxx_dual_abi = xyes; then
4166 AC_MSG_CHECKING([for default std::string ABI to use])
4167 AC_ARG_WITH([default-libstdcxx-abi],
4168 AS_HELP_STRING([--with-default-libstdcxx-abi],
4169 [set the std::string ABI to use by default]),
4170 [case "$withval" in
4171 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4172 new|cxx11) default_libstdcxx_abi="new" ;;
4173 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4174 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4175 esac
4176 ],
4177 [default_libstdcxx_abi="new"])
4178 AC_MSG_RESULT(${default_libstdcxx_abi})
4179 fi
4180 if test $default_libstdcxx_abi = "new"; then
4181 glibcxx_cxx11_abi=1
4182 glibcxx_cxx98_abi=0
4183 else
4184 glibcxx_cxx11_abi=0
4185 glibcxx_cxx98_abi=1
4186 fi
4187 AC_SUBST(glibcxx_cxx98_abi)
4188 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4189 ])
4191 dnl
4192 dnl Check to see whether to build libstdc++fs.a
4193 dnl
4194 dnl --enable-libstdcxx-filesystem-ts
4195 dnl
4196 AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4197 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4198 [turns on ISO/IEC TS 18822 support],
4199 [permit yes|no|auto])
4201 AC_MSG_CHECKING([whether to build Filesystem TS support])
4202 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4203 enable_libstdcxx_filesystem_ts=no
4204 fi
4205 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4206 case "${target_os}" in
4207 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4208 enable_libstdcxx_filesystem_ts=yes
4209 ;;
4210 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
4211 enable_libstdcxx_filesystem_ts=yes
4212 ;;
4213 solaris*)
4214 enable_libstdcxx_filesystem_ts=yes
4215 ;;
4216 *)
4217 enable_libstdcxx_filesystem_ts=no
4218 ;;
4219 esac
4220 fi
4221 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4222 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4223 ])
4225 dnl
4226 dnl Check whether the library calls required by the Filesystem TS are present
4227 dnl and define _GLIBCXX_USE_REALPATH and _GLIBCXX_USE_UTIMENSAT.
4228 dnl
4229 AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4230 dnl
4231 AC_LANG_SAVE
4232 AC_LANG_CPLUSPLUS
4233 ac_save_CXXFLAGS="$CXXFLAGS"
4234 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4235 dnl
4236 AC_MSG_CHECKING([for struct dirent.d_type])
4237 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
4238 GCC_TRY_COMPILE_OR_LINK(
4239 [#include <dirent.h>],
4240 [
4241 struct dirent d;
4242 if (sizeof d.d_type) return 0;
4243 ],
4244 [glibcxx_cv_dirent_d_type=yes],
4245 [glibcxx_cv_dirent_d_type=no])
4246 ])
4247 if test $glibcxx_cv_dirent_d_type = yes; then
4248 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
4249 fi
4250 AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
4251 dnl
4252 AC_MSG_CHECKING([for realpath])
4253 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
4254 GCC_TRY_COMPILE_OR_LINK(
4255 [
4256 #include <stdlib.h>
4257 #include <unistd.h>
4258 ],
4259 [
4260 #if _XOPEN_VERSION < 500
4261 #error
4262 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4263 char *tmp = realpath((const char*)NULL, (char*)NULL);
4264 #else
4265 #error
4266 #endif
4267 ],
4268 [glibcxx_cv_realpath=yes],
4269 [glibcxx_cv_realpath=no])
4270 ])
4271 if test $glibcxx_cv_realpath = yes; then
4272 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
4273 fi
4274 AC_MSG_RESULT($glibcxx_cv_realpath)
4275 dnl
4276 AC_MSG_CHECKING([for utimensat])
4277 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl
4278 GCC_TRY_COMPILE_OR_LINK(
4279 [
4280 #include <fcntl.h>
4281 #include <sys/stat.h>
4282 ],
4283 [
4284 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4285 int i = utimensat(AT_FDCWD, "path", ts, 0);
4286 ],
4287 [glibcxx_cv_utimensat=yes],
4288 [glibcxx_cv_utimensat=no])
4289 ])
4290 if test $glibcxx_cv_utimensat = yes; then
4291 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4292 fi
4293 AC_MSG_RESULT($glibcxx_cv_utimensat)
4294 dnl
4295 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec])
4296 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl
4297 GCC_TRY_COMPILE_OR_LINK(
4298 [ #include <sys/stat.h> ],
4299 [
4300 struct stat st;
4301 return st.st_mtim.tv_nsec;
4302 ],
4303 [glibcxx_cv_st_mtim=yes],
4304 [glibcxx_cv_st_mtim=no])
4305 ])
4306 if test $glibcxx_cv_st_mtim = yes; then
4307 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4308 fi
4309 AC_MSG_RESULT($glibcxx_cv_st_mtim)
4310 dnl
4311 AC_MSG_CHECKING([for fchmod])
4312 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl
4313 GCC_TRY_COMPILE_OR_LINK(
4314 [#include <sys/stat.h>],
4315 [fchmod(1, S_IWUSR);],
4316 [glibcxx_cv_fchmod=yes],
4317 [glibcxx_cv_fchmod=no])
4318 ])
4319 if test $glibcxx_cv_fchmod = yes; then
4320 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4321 fi
4322 AC_MSG_RESULT($glibcxx_cv_fchmod)
4323 dnl
4324 AC_MSG_CHECKING([for fchmodat])
4325 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl
4326 GCC_TRY_COMPILE_OR_LINK(
4327 [
4328 #include <fcntl.h>
4329 #include <sys/stat.h>
4330 ],
4331 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4332 [glibcxx_cv_fchmodat=yes],
4333 [glibcxx_cv_fchmodat=no])
4334 ])
4335 if test $glibcxx_cv_fchmodat = yes; then
4336 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4337 fi
4338 AC_MSG_RESULT($glibcxx_cv_fchmodat)
4339 dnl
4340 AC_MSG_CHECKING([for sendfile that can copy files])
4341 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl
4342 case "${target_os}" in
4343 gnu* | linux* | solaris*)
4344 GCC_TRY_COMPILE_OR_LINK(
4345 [#include <sys/sendfile.h>],
4346 [sendfile(1, 2, (off_t*)NULL, sizeof 1);],
4347 [glibcxx_cv_sendfile=yes],
4348 [glibcxx_cv_sendfile=no])
4349 ;;
4350 *)
4351 glibcxx_cv_sendfile=no
4352 ;;
4353 esac
4354 ])
4355 if test $glibcxx_cv_sendfile = yes; then
4356 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/stat.h>.])
4357 fi
4358 AC_MSG_RESULT($glibcxx_cv_sendfile)
4359 dnl
4360 CXXFLAGS="$ac_save_CXXFLAGS"
4361 AC_LANG_RESTORE
4362 ])
4364 dnl
4365 dnl Check how size_t is mangled. Copied from libitm.
4366 dnl
4367 AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [
4368 AC_CACHE_CHECK([how size_t is mangled],
4369 glibcxx_cv_size_t_mangling, [
4370 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
4371 [glibcxx_cv_size_t_mangling=m], [
4372 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
4373 [glibcxx_cv_size_t_mangling=j], [
4374 AC_TRY_COMPILE([],
4375 [extern __SIZE_TYPE__ x; extern unsigned long long x;],
4376 [glibcxx_cv_size_t_mangling=y], [
4377 AC_TRY_COMPILE([],
4378 [extern __SIZE_TYPE__ x; extern unsigned short x;],
4379 [glibcxx_cv_size_t_mangling=t],
4380 [glibcxx_cv_size_t_mangling=x])
4381 ])
4382 ])
4383 ])
4384 ])
4385 if test $glibcxx_cv_size_t_mangling = x; then
4386 AC_MSG_ERROR([Unknown underlying type for size_t])
4387 fi
4388 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling],
4389 [Define to the letter to which size_t is mangled.])
4390 ])
4392 # Macros from the top-level gcc directory.
4393 m4_include([../config/gc++filt.m4])
4394 m4_include([../config/tls.m4])
4395 m4_include([../config/gthr.m4])