| blob | b76e8d51b960beffa4fba96b5715c0024fe87211 |
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*)
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 and isnan functions in <math.h>])
2195 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf_isnan, [
2196 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2197 [#include <math.h>
2198 #undef isinf
2199 #undef isnan
2200 namespace std {
2201 using ::isinf;
2202 bool isinf(float);
2203 bool isinf(long double);
2204 using ::isnan;
2205 bool isnan(float);
2206 bool isnan(long double);
2207 }
2208 using std::isinf;
2209 using std::isnan;
2210 bool b = isinf(0.0) || isnan(0.0);
2211 ])],
2212 [glibcxx_cv_obsolete_isinf_isnan=yes],
2213 [glibcxx_cv_obsolete_isinf_isnan=no]
2214 )])
2217 if test $glibcxx_cv_obsolete_isinf_isnan = yes; then
2218 AC_DEFINE(HAVE_OBSOLETE_ISINF_ISNAN, 1,
2219 [Define if <math.h> defines obsolete isinf and isnan functions.])
2220 fi
2221 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf_isnan])
2222 ;;
2223 esac
2225 CXXFLAGS="$ac_save_CXXFLAGS"
2226 AC_LANG_RESTORE
2227 ])
2229 dnl
2230 dnl Check whether macros, etc are present for <system_error>
2231 dnl
2232 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
2234 m4_pushdef([n_syserr], [1])dnl
2235 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
2236 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
2237 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
2238 ECHILD, ENOSPC, EPERM,
2239 ETIMEDOUT, EWOULDBLOCK],
2240 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
2241 AC_MSG_CHECKING([for syserr])
2242 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
2243 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
2244 [int i = syserr;])],
2245 [glibcxx_cv_system_error[]n_syserr=yes],
2246 [glibcxx_cv_system_error[]n_syserr=no])
2247 ])
2248 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
2249 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
2250 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
2251 fi
2252 m4_define([n_syserr], m4_incr(n_syserr))dnl
2253 m4_popdef([SYSERR])dnl
2254 ])
2255 m4_popdef([n_syserr])dnl
2256 ])
2258 dnl
2259 dnl Check for what type of C headers to use.
2260 dnl
2261 dnl --enable-cheaders= [does stuff].
2262 dnl --disable-cheaders [does not do anything, really].
2263 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
2264 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
2265 dnl
2266 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
2267 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
2268 [construct "C" headers for g++], [permit c|c_std|c_global])
2269 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2271 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2273 # Allow overrides to configure.host here.
2274 if test $enable_cheaders = c_global; then
2275 c_compatibility=yes
2276 fi
2278 AC_SUBST(C_INCLUDE_DIR)
2279 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2280 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
2281 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
2282 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
2283 ])
2286 dnl
2287 dnl Check for which locale library to use. The choice is mapped to
2288 dnl a subdirectory of config/locale.
2289 dnl
2290 dnl Default is generic.
2291 dnl
2292 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
2293 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
2294 [use MODEL for target locale package],
2295 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
2297 # Deal with gettext issues. Default to not using it (=no) until we detect
2298 # support for it later. Let the user turn it off via --e/d, but let that
2299 # default to on for easier handling.
2300 USE_NLS=no
2301 AC_ARG_ENABLE(nls,
2302 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2303 [],
2304 [enable_nls=yes])
2306 # Either a known package, or "auto"
2307 if test $enable_clocale = no || test $enable_clocale = yes; then
2308 enable_clocale=auto
2309 fi
2310 enable_clocale_flag=$enable_clocale
2312 # Probe for locale model to use if none specified.
2313 # Default to "generic".
2314 if test $enable_clocale_flag = auto; then
2315 case ${target_os} in
2316 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2317 enable_clocale_flag=gnu
2318 ;;
2319 darwin*)
2320 enable_clocale_flag=darwin
2321 ;;
2322 dragonfly* | freebsd*)
2323 enable_clocale_flag=dragonfly
2324 ;;
2325 openbsd*)
2326 enable_clocale_flag=newlib
2327 ;;
2328 *)
2329 if test x"$with_newlib" = x"yes"; then
2330 enable_clocale_flag=newlib
2331 else
2332 enable_clocale_flag=generic
2333 fi
2334 ;;
2335 esac
2336 fi
2338 # Sanity check model, and test for special functionality.
2339 if test $enable_clocale_flag = gnu; then
2340 AC_EGREP_CPP([_GLIBCXX_ok], [
2341 #include <features.h>
2342 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
2343 _GLIBCXX_ok
2344 #endif
2345 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2347 # Set it to scream when it hurts.
2348 ac_save_CFLAGS="$CFLAGS"
2349 CFLAGS="-Wimplicit-function-declaration -Werror"
2351 # Use strxfrm_l if available.
2352 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2353 #include <string.h>
2354 #include <locale.h>],
2355 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2356 AC_DEFINE(HAVE_STRXFRM_L, 1,
2357 [Define if strxfrm_l is available in <string.h>.]),)
2359 # Use strerror_l if available.
2360 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2361 #include <string.h>
2362 #include <locale.h>],
2363 [__locale_t loc; strerror_l(5, loc);],
2364 AC_DEFINE(HAVE_STRERROR_L, 1,
2365 [Define if strerror_l is available in <string.h>.]),)
2367 CFLAGS="$ac_save_CFLAGS"
2368 fi
2370 # Perhaps use strerror_r if available, and strerror_l isn't.
2371 ac_save_CFLAGS="$CFLAGS"
2372 CFLAGS="-Wimplicit-function-declaration -Werror"
2373 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2374 #include <string.h>
2375 #include <locale.h>],
2376 [char s[128]; strerror_r(5, s, 128);],
2377 AC_DEFINE(HAVE_STRERROR_R, 1,
2378 [Define if strerror_r is available in <string.h>.]),)
2379 CFLAGS="$ac_save_CFLAGS"
2381 # Set configure bits for specified locale package
2382 AC_MSG_CHECKING([for C locale to use])
2383 case ${enable_clocale_flag} in
2384 generic)
2385 AC_MSG_RESULT(generic)
2387 CLOCALE_H=config/locale/generic/c_locale.h
2388 CLOCALE_CC=config/locale/generic/c_locale.cc
2389 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2390 CCOLLATE_CC=config/locale/generic/collate_members.cc
2391 CCTYPE_CC=config/locale/generic/ctype_members.cc
2392 CMESSAGES_H=config/locale/generic/messages_members.h
2393 CMESSAGES_CC=config/locale/generic/messages_members.cc
2394 CMONEY_CC=config/locale/generic/monetary_members.cc
2395 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2396 CTIME_H=config/locale/generic/time_members.h
2397 CTIME_CC=config/locale/generic/time_members.cc
2398 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2399 ;;
2400 darwin)
2401 AC_MSG_RESULT(darwin)
2403 CLOCALE_H=config/locale/generic/c_locale.h
2404 CLOCALE_CC=config/locale/generic/c_locale.cc
2405 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2406 CCOLLATE_CC=config/locale/generic/collate_members.cc
2407 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2408 CMESSAGES_H=config/locale/generic/messages_members.h
2409 CMESSAGES_CC=config/locale/generic/messages_members.cc
2410 CMONEY_CC=config/locale/generic/monetary_members.cc
2411 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2412 CTIME_H=config/locale/generic/time_members.h
2413 CTIME_CC=config/locale/generic/time_members.cc
2414 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2415 ;;
2417 dragonfly)
2418 AC_MSG_RESULT(dragonfly or freebsd)
2420 CLOCALE_H=config/locale/dragonfly/c_locale.h
2421 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
2422 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2423 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
2424 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2425 CMESSAGES_H=config/locale/generic/messages_members.h
2426 CMESSAGES_CC=config/locale/generic/messages_members.cc
2427 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2428 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2429 CTIME_H=config/locale/dragonfly/time_members.h
2430 CTIME_CC=config/locale/dragonfly/time_members.cc
2431 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2432 ;;
2434 gnu)
2435 AC_MSG_RESULT(gnu)
2437 # Declare intention to use gettext, and add support for specific
2438 # languages.
2439 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2440 ALL_LINGUAS="de fr"
2442 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2443 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2444 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2445 USE_NLS=yes
2446 fi
2447 # Export the build objects.
2448 for ling in $ALL_LINGUAS; do \
2449 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2450 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2451 done
2452 AC_SUBST(glibcxx_MOFILES)
2453 AC_SUBST(glibcxx_POFILES)
2455 CLOCALE_H=config/locale/gnu/c_locale.h
2456 CLOCALE_CC=config/locale/gnu/c_locale.cc
2457 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2458 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2459 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2460 CMESSAGES_H=config/locale/gnu/messages_members.h
2461 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2462 CMONEY_CC=config/locale/gnu/monetary_members.cc
2463 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2464 CTIME_H=config/locale/gnu/time_members.h
2465 CTIME_CC=config/locale/gnu/time_members.cc
2466 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2467 ;;
2468 ieee_1003.1-2001)
2469 AC_MSG_RESULT(IEEE 1003.1)
2471 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2472 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2473 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2474 CCOLLATE_CC=config/locale/generic/collate_members.cc
2475 CCTYPE_CC=config/locale/generic/ctype_members.cc
2476 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2477 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2478 CMONEY_CC=config/locale/generic/monetary_members.cc
2479 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2480 CTIME_H=config/locale/generic/time_members.h
2481 CTIME_CC=config/locale/generic/time_members.cc
2482 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2483 ;;
2484 newlib)
2485 AC_MSG_RESULT(newlib)
2487 CLOCALE_H=config/locale/generic/c_locale.h
2488 CLOCALE_CC=config/locale/generic/c_locale.cc
2489 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2490 CCOLLATE_CC=config/locale/generic/collate_members.cc
2491 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2492 CMESSAGES_H=config/locale/generic/messages_members.h
2493 CMESSAGES_CC=config/locale/generic/messages_members.cc
2494 CMONEY_CC=config/locale/generic/monetary_members.cc
2495 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2496 CTIME_H=config/locale/generic/time_members.h
2497 CTIME_CC=config/locale/generic/time_members.cc
2498 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2499 ;;
2500 esac
2502 # This is where the testsuite looks for locale catalogs, using the
2503 # -DLOCALEDIR define during testsuite compilation.
2504 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2505 AC_SUBST(glibcxx_localedir)
2507 # A standalone libintl (e.g., GNU libintl) may be in use.
2508 if test $USE_NLS = yes; then
2509 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2510 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2511 fi
2512 if test $USE_NLS = yes; then
2513 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2514 [Define if NLS translations are to be used.])
2515 fi
2517 AC_SUBST(USE_NLS)
2518 AC_SUBST(CLOCALE_H)
2519 AC_SUBST(CMESSAGES_H)
2520 AC_SUBST(CCODECVT_CC)
2521 AC_SUBST(CCOLLATE_CC)
2522 AC_SUBST(CCTYPE_CC)
2523 AC_SUBST(CMESSAGES_CC)
2524 AC_SUBST(CMONEY_CC)
2525 AC_SUBST(CNUMERIC_CC)
2526 AC_SUBST(CTIME_H)
2527 AC_SUBST(CTIME_CC)
2528 AC_SUBST(CLOCALE_CC)
2529 AC_SUBST(CLOCALE_INTERNAL_H)
2530 ])
2533 dnl
2534 dnl Check for which std::allocator base class to use. The choice is
2535 dnl mapped from a subdirectory of include/ext.
2536 dnl
2537 dnl Default is new.
2538 dnl
2539 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2540 AC_MSG_CHECKING([for std::allocator base class])
2541 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2542 [use KIND for target std::allocator base],
2543 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2545 # If they didn't use this option switch, or if they specified --enable
2546 # with no specific model, we'll have to look for one. If they
2547 # specified --disable (???), do likewise.
2548 if test $enable_libstdcxx_allocator = no ||
2549 test $enable_libstdcxx_allocator = yes;
2550 then
2551 enable_libstdcxx_allocator=auto
2552 fi
2554 # Either a known package, or "auto". Auto implies the default choice
2555 # for a particular platform.
2556 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2558 # Probe for host-specific support if no specific model is specified.
2559 # Default to "new".
2560 if test $enable_libstdcxx_allocator_flag = auto; then
2561 case ${target_os} in
2562 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2563 enable_libstdcxx_allocator_flag=new
2564 ;;
2565 *)
2566 enable_libstdcxx_allocator_flag=new
2567 ;;
2568 esac
2569 fi
2570 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2573 # Set configure bits for specified locale package
2574 case ${enable_libstdcxx_allocator_flag} in
2575 bitmap)
2576 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2577 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2578 ;;
2579 malloc)
2580 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2581 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2582 ;;
2583 mt)
2584 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2585 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2586 ;;
2587 new)
2588 ALLOCATOR_H=config/allocator/new_allocator_base.h
2589 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2590 ;;
2591 pool)
2592 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2593 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2594 ;;
2595 esac
2597 AC_SUBST(ALLOCATOR_H)
2598 AC_SUBST(ALLOCATOR_NAME)
2599 ])
2602 dnl
2603 dnl Check for whether the Boost-derived checks should be turned on.
2604 dnl
2605 dnl --enable-concept-checks turns them on.
2606 dnl --disable-concept-checks leaves them off.
2607 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2608 dnl Where DEFAULT is either `yes' or `no'.
2609 dnl
2610 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2611 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2612 if test $enable_concept_checks = yes; then
2613 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2614 [Define to use concept checking code from the boost libraries.])
2615 fi
2616 ])
2618 dnl
2619 dnl Use extern templates.
2620 dnl
2621 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2622 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2624 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2625 dnl Where DEFAULT is `yes' or `no'.
2626 dnl
2627 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2629 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2631 AC_MSG_CHECKING([for extern template support])
2632 AC_MSG_RESULT([$enable_extern_template])
2634 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2635 ])
2637 dnl
2638 dnl Use vtable verification.
2639 dnl
2640 dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2641 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2643 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2644 dnl Where DEFAULT is `yes' or `no'.
2645 dnl
2646 AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2648 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2650 AC_MSG_CHECKING([for vtable verify support])
2651 AC_MSG_RESULT([$enable_vtable_verify])
2653 vtv_cygmin=no
2654 if test $enable_vtable_verify = yes; then
2655 case ${target_os} in
2656 cygwin*|mingw32*)
2657 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2658 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2659 vtv_cygmin=yes
2660 ;;
2661 darwin*)
2662 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2663 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2664 ;;
2665 solaris2*)
2666 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2667 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2668 ;;
2669 *)
2670 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2671 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2672 ;;
2673 esac
2674 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2675 else
2676 VTV_CXXFLAGS=
2677 VTV_PCH_CXXFLAGS=
2678 VTV_CXXLINKFLAGS=
2679 fi
2681 AC_SUBST(VTV_CXXFLAGS)
2682 AC_SUBST(VTV_PCH_CXXFLAGS)
2683 AC_SUBST(VTV_CXXLINKFLAGS)
2684 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2685 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2686 ])
2688 dnl
2689 dnl Check for parallel mode pre-requisites, including OpenMP support.
2690 dnl
2691 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2692 dnl
2693 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2695 enable_parallel=no;
2697 # See if configured libgomp/omp.h exists. (libgomp may be in
2698 # noconfigdirs but not explicitly disabled.)
2699 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2700 enable_parallel=yes;
2701 else
2702 AC_MSG_NOTICE([target-libgomp not built])
2703 fi
2705 AC_MSG_CHECKING([for parallel mode support])
2706 AC_MSG_RESULT([$enable_parallel])
2707 ])
2710 dnl
2711 dnl Check for which I/O library to use: stdio, or something specific.
2712 dnl
2713 dnl Default is stdio.
2714 dnl
2715 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2716 AC_MSG_CHECKING([for underlying I/O to use])
2717 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2718 [use target-specific I/O package], [permit stdio])
2720 # Now that libio has been removed, you can have any color you want as long
2721 # as it's black. This is one big no-op until other packages are added, but
2722 # showing the framework never hurts.
2723 case ${enable_cstdio} in
2724 stdio)
2725 CSTDIO_H=config/io/c_io_stdio.h
2726 BASIC_FILE_H=config/io/basic_file_stdio.h
2727 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2728 AC_MSG_RESULT(stdio)
2729 ;;
2730 esac
2732 AC_SUBST(CSTDIO_H)
2733 AC_SUBST(BASIC_FILE_H)
2734 AC_SUBST(BASIC_FILE_CC)
2735 ])
2738 dnl
2739 dnl Check for "unusual" flags to pass to the compiler while building.
2740 dnl
2741 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2742 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2743 dnl --disable-cxx-flags passes nothing.
2744 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2745 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2746 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2747 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2748 dnl If "default flags" is an empty string, the effect is the same
2749 dnl as --disable or --enable=no.
2750 dnl
2751 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2752 AC_MSG_CHECKING([for extra compiler flags for building])
2753 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2754 [pass compiler FLAGS when building library],
2755 [case "x$enable_cxx_flags" in
2756 xno | x) enable_cxx_flags= ;;
2757 x-*) ;;
2758 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2759 esac])
2761 # Run through flags (either default or command-line) and set anything
2762 # extra (e.g., #defines) that must accompany particular g++ options.
2763 if test -n "$enable_cxx_flags"; then
2764 for f in $enable_cxx_flags; do
2765 case "$f" in
2766 -fhonor-std) ;;
2767 -*) ;;
2768 *) # and we're trying to pass /what/ exactly?
2769 AC_MSG_ERROR([compiler flags start with a -]) ;;
2770 esac
2771 done
2772 fi
2774 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2775 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2776 AC_SUBST(EXTRA_CXX_FLAGS)
2777 ])
2780 dnl
2781 dnl Check to see if debugging libraries are to be built.
2782 dnl
2783 dnl --enable-libstdcxx-debug
2784 dnl builds a separate set of debugging libraries in addition to the
2785 dnl normal (shared, static) libstdc++ binaries.
2786 dnl
2787 dnl --disable-libstdcxx-debug
2788 dnl builds only one (non-debug) version of libstdc++.
2789 dnl
2790 dnl --enable-libstdcxx-debug-flags=FLAGS
2791 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2792 dnl
2793 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2794 dnl Where DEFAULT is either `yes' or `no'.
2795 dnl
2796 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2797 AC_MSG_CHECKING([for additional debug build])
2798 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2799 AC_MSG_RESULT($enable_libstdcxx_debug)
2800 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2801 ])
2804 dnl
2805 dnl Check for explicit debug flags.
2806 dnl
2807 dnl --enable-libstdcxx-debug-flags='-O1'
2808 dnl is a general method for passing flags to be used when
2809 dnl building debug libraries with --enable-libstdcxx-debug.
2810 dnl
2811 dnl --disable-libstdcxx-debug-flags does nothing.
2812 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2813 dnl If "default flags" is an empty string, the effect is the same
2814 dnl as --disable or --enable=no.
2815 dnl
2816 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2817 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2818 [pass compiler FLAGS when building debug library],
2819 [case "x$enable_libstdcxx_debug_flags" in
2820 xno | x) enable_libstdcxx_debug_flags= ;;
2821 x-*) ;;
2822 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2823 esac])
2825 # Option parsed, now set things appropriately
2826 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2827 AC_SUBST(DEBUG_FLAGS)
2829 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2830 ])
2833 dnl
2834 dnl Check if the user only wants a freestanding library implementation.
2835 dnl
2836 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2837 dnl installing only the headers required by [17.4.1.3] and the language
2838 dnl support library. More than that will be built (to keep the Makefiles
2839 dnl conveniently clean), but not installed.
2840 dnl
2841 dnl Sets:
2842 dnl is_hosted (yes/no)
2843 dnl
2844 dnl Defines:
2845 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2846 dnl
2847 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2848 AC_ARG_ENABLE([hosted-libstdcxx],
2849 AC_HELP_STRING([--disable-hosted-libstdcxx],
2850 [only build freestanding C++ runtime support]),,
2851 [case "$host" in
2852 arm*-*-symbianelf*)
2853 enable_hosted_libstdcxx=no
2854 ;;
2855 *)
2856 enable_hosted_libstdcxx=yes
2857 ;;
2858 esac])
2859 if test "$enable_hosted_libstdcxx" = no; then
2860 AC_MSG_NOTICE([Only freestanding libraries will be built])
2861 is_hosted=no
2862 hosted_define=0
2863 enable_abi_check=no
2864 enable_libstdcxx_pch=no
2865 else
2866 is_hosted=yes
2867 hosted_define=1
2868 fi
2869 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2870 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2871 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2872 ])
2875 dnl
2876 dnl Check if the user wants a non-verbose library implementation.
2877 dnl
2878 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2879 dnl standard error on termination.
2880 dnl
2881 dnl Defines:
2882 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2883 dnl
2884 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2885 AC_ARG_ENABLE([libstdcxx-verbose],
2886 AC_HELP_STRING([--disable-libstdcxx-verbose],
2887 [disable termination messages to standard error]),,
2888 [enable_libstdcxx_verbose=yes])
2889 if test x"$enable_libstdcxx_verbose" = xyes; then
2890 verbose_define=1
2891 else
2892 AC_MSG_NOTICE([verbose termination messages are disabled])
2893 verbose_define=0
2894 fi
2895 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
2896 [Define to 1 if a verbose library is built, or 0 otherwise.])
2897 ])
2900 dnl
2901 dnl Check for template specializations for the 'long long' type.
2902 dnl The result determines only whether 'long long' I/O is enabled; things
2903 dnl like numeric_limits<> specializations are always available.
2904 dnl
2905 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2906 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2907 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2908 dnl Where DEFAULT is either `yes' or `no'.
2909 dnl
2910 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2911 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2912 if test $enable_long_long = yes; then
2913 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2914 [Define if code specialized for long long should be used.])
2915 fi
2916 AC_MSG_CHECKING([for enabled long long specializations])
2917 AC_MSG_RESULT([$enable_long_long])
2918 ])
2921 dnl
2922 dnl Check for decimal floating point.
2923 dnl See:
2924 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2925 dnl
2926 dnl This checks to see if the host supports decimal floating point types.
2927 dnl
2928 dnl Defines:
2929 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2930 dnl
2931 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2933 # Fake what AC_TRY_COMPILE does, without linking as this is
2934 # unnecessary for this test.
2936 cat > conftest.$ac_ext << EOF
2937 [#]line __oline__ "configure"
2938 int main()
2939 {
2940 _Decimal32 d1;
2941 _Decimal64 d2;
2942 _Decimal128 d3;
2943 return 0;
2944 }
2945 EOF
2947 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2948 if AC_TRY_EVAL(ac_compile); then
2949 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2950 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2951 enable_dfp=yes
2952 else
2953 enable_dfp=no
2954 fi
2955 AC_MSG_RESULT($enable_dfp)
2956 rm -f conftest*
2957 ])
2959 dnl
2960 dnl Check for GNU 128-bit integer and floating point types.
2961 dnl
2962 dnl Note: also checks that the types aren't standard types.
2963 dnl
2964 dnl Defines:
2965 dnl _GLIBCXX_USE_INT128
2966 dnl _GLIBCXX_USE_FLOAT128
2967 dnl
2968 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
2970 AC_LANG_SAVE
2971 AC_LANG_CPLUSPLUS
2973 # Fake what AC_TRY_COMPILE does, without linking as this is
2974 # unnecessary for this test.
2976 cat > conftest.$ac_ext << EOF
2977 [#]line __oline__ "configure"
2978 template<typename T1, typename T2>
2979 struct same
2980 { typedef T2 type; };
2982 template<typename T>
2983 struct same<T, T>;
2985 int main()
2986 {
2987 typename same<long, __int128>::type i1;
2988 typename same<long long, __int128>::type i2;
2989 }
2990 EOF
2992 AC_MSG_CHECKING([for __int128])
2993 if AC_TRY_EVAL(ac_compile); then
2994 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
2995 [Define if __int128 is supported on this host.])
2996 enable_int128=yes
2997 else
2998 enable_int128=no
2999 fi
3000 AC_MSG_RESULT($enable_int128)
3001 rm -f conftest*
3003 cat > conftest.$ac_ext << EOF
3004 [#]line __oline__ "configure"
3005 template<typename T1, typename T2>
3006 struct same
3007 { typedef T2 type; };
3009 template<typename T>
3010 struct same<T, T>;
3012 int main()
3013 {
3014 typename same<double, __float128>::type f1;
3015 typename same<long double, __float128>::type f2;
3016 }
3017 EOF
3019 AC_MSG_CHECKING([for __float128])
3020 if AC_TRY_EVAL(ac_compile); then
3021 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
3022 [Define if __float128 is supported on this host.])
3023 enable_float128=yes
3024 else
3025 enable_float128=no
3026 fi
3027 AC_MSG_RESULT($enable_float128)
3028 rm -f conftest*
3030 AC_LANG_RESTORE
3031 ])
3033 dnl
3034 dnl Check for template specializations for the 'wchar_t' type.
3035 dnl
3036 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3037 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3038 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3039 dnl Where DEFAULT is either `yes' or `no'.
3040 dnl
3041 dnl Necessary support must also be present.
3042 dnl
3043 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3044 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
3046 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3047 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3048 AC_MSG_CHECKING([for mbstate_t])
3049 AC_TRY_COMPILE([#include <wchar.h>],
3050 [mbstate_t teststate;],
3051 have_mbstate_t=yes, have_mbstate_t=no)
3052 AC_MSG_RESULT($have_mbstate_t)
3053 if test x"$have_mbstate_t" = xyes; then
3054 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3055 fi
3057 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3058 # ac_has_wchar_h.
3059 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
3061 if test x"$enable_wchar_t" = x"yes"; then
3063 AC_LANG_SAVE
3064 AC_LANG_CPLUSPLUS
3066 if test x"$ac_has_wchar_h" = xyes &&
3067 test x"$ac_has_wctype_h" = xyes; then
3068 AC_TRY_COMPILE([#include <wchar.h>
3069 #include <stddef.h>
3070 wint_t i;
3071 long l = WEOF;
3072 long j = WCHAR_MIN;
3073 long k = WCHAR_MAX;
3074 namespace test
3075 {
3076 using ::btowc;
3077 using ::fgetwc;
3078 using ::fgetws;
3079 using ::fputwc;
3080 using ::fputws;
3081 using ::fwide;
3082 using ::fwprintf;
3083 using ::fwscanf;
3084 using ::getwc;
3085 using ::getwchar;
3086 using ::mbrlen;
3087 using ::mbrtowc;
3088 using ::mbsinit;
3089 using ::mbsrtowcs;
3090 using ::putwc;
3091 using ::putwchar;
3092 using ::swprintf;
3093 using ::swscanf;
3094 using ::ungetwc;
3095 using ::vfwprintf;
3096 using ::vswprintf;
3097 using ::vwprintf;
3098 using ::wcrtomb;
3099 using ::wcscat;
3100 using ::wcschr;
3101 using ::wcscmp;
3102 using ::wcscoll;
3103 using ::wcscpy;
3104 using ::wcscspn;
3105 using ::wcsftime;
3106 using ::wcslen;
3107 using ::wcsncat;
3108 using ::wcsncmp;
3109 using ::wcsncpy;
3110 using ::wcspbrk;
3111 using ::wcsrchr;
3112 using ::wcsrtombs;
3113 using ::wcsspn;
3114 using ::wcsstr;
3115 using ::wcstod;
3116 using ::wcstok;
3117 using ::wcstol;
3118 using ::wcstoul;
3119 using ::wcsxfrm;
3120 using ::wctob;
3121 using ::wmemchr;
3122 using ::wmemcmp;
3123 using ::wmemcpy;
3124 using ::wmemmove;
3125 using ::wmemset;
3126 using ::wprintf;
3127 using ::wscanf;
3128 }
3129 ],[],[], [enable_wchar_t=no])
3130 else
3131 enable_wchar_t=no
3132 fi
3134 AC_LANG_RESTORE
3135 fi
3137 if test x"$enable_wchar_t" = x"yes"; then
3138 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
3139 [Define if code specialized for wchar_t should be used.])
3140 fi
3142 AC_MSG_CHECKING([for enabled wchar_t specializations])
3143 AC_MSG_RESULT([$enable_wchar_t])
3144 ])
3147 dnl
3148 dnl Check to see if building and using a C++ precompiled header can be done.
3149 dnl
3150 dnl --enable-libstdcxx-pch=yes
3151 dnl default, this shows intent to use stdc++.h.gch If it looks like it
3152 dnl may work, after some light-hearted attempts to puzzle out compiler
3153 dnl support, flip bits on in include/Makefile.am
3154 dnl
3155 dnl --disable-libstdcxx-pch
3156 dnl turns off attempts to use or build stdc++.h.gch.
3157 dnl
3158 dnl Substs:
3159 dnl glibcxx_PCHFLAGS
3160 dnl
3161 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
3162 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
3163 if test $enable_libstdcxx_pch = yes; then
3164 AC_CACHE_CHECK([for compiler with PCH support],
3165 [glibcxx_cv_prog_CXX_pch],
3166 [ac_save_CXXFLAGS="$CXXFLAGS"
3167 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3168 AC_LANG_SAVE
3169 AC_LANG_CPLUSPLUS
3170 echo '#include <math.h>' > conftest.h
3171 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
3172 -o conftest.h.gch 1>&5 2>&1 &&
3173 echo '#error "pch failed"' > conftest.h &&
3174 echo '#include "conftest.h"' > conftest.cc &&
3175 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3176 then
3177 glibcxx_cv_prog_CXX_pch=yes
3178 else
3179 glibcxx_cv_prog_CXX_pch=no
3180 fi
3181 rm -f conftest*
3182 CXXFLAGS=$ac_save_CXXFLAGS
3183 AC_LANG_RESTORE
3184 ])
3185 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
3186 fi
3188 AC_MSG_CHECKING([for enabled PCH])
3189 AC_MSG_RESULT([$enable_libstdcxx_pch])
3191 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
3192 if test $enable_libstdcxx_pch = yes; then
3193 glibcxx_PCHFLAGS="-include bits/stdc++.h"
3194 else
3195 glibcxx_PCHFLAGS=""
3196 fi
3197 AC_SUBST(glibcxx_PCHFLAGS)
3198 ])
3201 dnl
3202 dnl Check for atomic builtins.
3203 dnl See:
3204 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
3205 dnl
3206 dnl This checks to see if the host supports the compiler-generated
3207 dnl builtins for atomic operations for various integral sizes. Note, this
3208 dnl is intended to be an all-or-nothing switch, so all the atomic operations
3209 dnl that are used should be checked.
3210 dnl
3211 dnl Note:
3212 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
3213 dnl
3214 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
3215 AC_LANG_SAVE
3216 AC_LANG_CPLUSPLUS
3217 old_CXXFLAGS="$CXXFLAGS"
3219 # Do link tests if possible, instead asm tests, limited to some platforms
3220 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3221 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3222 atomic_builtins_link_tests=no
3223 if test x$gcc_no_link != xyes; then
3224 # Can do link tests. Limit to some tested platforms
3225 case "$host" in
3226 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3227 atomic_builtins_link_tests=yes
3228 ;;
3229 esac
3230 fi
3232 if test x$atomic_builtins_link_tests = xyes; then
3234 # Do link tests.
3236 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3238 AC_MSG_CHECKING([for atomic builtins for bool])
3239 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
3240 AC_TRY_LINK(
3241 [ ],
3242 [typedef bool atomic_type;
3243 atomic_type c1;
3244 atomic_type c2;
3245 atomic_type c3(0);
3246 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3247 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3248 __ATOMIC_RELAXED);
3249 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3250 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3251 ],
3252 [glibcxx_cv_atomic_bool=yes],
3253 [glibcxx_cv_atomic_bool=no])
3254 ])
3255 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3257 AC_MSG_CHECKING([for atomic builtins for short])
3258 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
3259 AC_TRY_LINK(
3260 [ ],
3261 [typedef short atomic_type;
3262 atomic_type c1;
3263 atomic_type c2;
3264 atomic_type c3(0);
3265 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3266 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3267 __ATOMIC_RELAXED);
3268 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3269 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3270 ],
3271 [glibcxx_cv_atomic_short=yes],
3272 [glibcxx_cv_atomic_short=no])
3273 ])
3274 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3276 AC_MSG_CHECKING([for atomic builtins for int])
3277 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
3278 AC_TRY_LINK(
3279 [ ],
3280 [typedef int atomic_type;
3281 atomic_type c1;
3282 atomic_type c2;
3283 atomic_type c3(0);
3284 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3285 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3286 __ATOMIC_RELAXED);
3287 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3288 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3289 ],
3290 [glibcxx_cv_atomic_int=yes],
3291 [glibcxx_cv_atomic_int=no])
3292 ])
3293 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3295 AC_MSG_CHECKING([for atomic builtins for long long])
3296 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
3297 AC_TRY_LINK(
3298 [ ],
3299 [typedef long long atomic_type;
3300 atomic_type c1;
3301 atomic_type c2;
3302 atomic_type c3(0);
3303 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3304 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3305 __ATOMIC_RELAXED);
3306 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3307 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3308 ],
3309 [glibcxx_cv_atomic_long_long=yes],
3310 [glibcxx_cv_atomic_long_long=no])
3311 ])
3312 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3314 else
3316 # Do asm tests.
3318 # Compile unoptimized.
3319 CXXFLAGS='-O0 -S'
3321 # Fake what AC_TRY_COMPILE does.
3323 cat > conftest.$ac_ext << EOF
3324 [#]line __oline__ "configure"
3325 int main()
3326 {
3327 typedef bool atomic_type;
3328 atomic_type c1;
3329 atomic_type c2;
3330 atomic_type c3(0);
3331 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3332 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3333 __ATOMIC_RELAXED);
3334 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3335 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3337 return 0;
3338 }
3339 EOF
3341 AC_MSG_CHECKING([for atomic builtins for bool])
3342 if AC_TRY_EVAL(ac_compile); then
3343 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3344 glibcxx_cv_atomic_bool=no
3345 else
3346 glibcxx_cv_atomic_bool=yes
3347 fi
3348 fi
3349 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3350 rm -f conftest*
3352 cat > conftest.$ac_ext << EOF
3353 [#]line __oline__ "configure"
3354 int main()
3355 {
3356 typedef short atomic_type;
3357 atomic_type c1;
3358 atomic_type c2;
3359 atomic_type c3(0);
3360 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3361 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3362 __ATOMIC_RELAXED);
3363 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3364 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3366 return 0;
3367 }
3368 EOF
3370 AC_MSG_CHECKING([for atomic builtins for short])
3371 if AC_TRY_EVAL(ac_compile); then
3372 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3373 glibcxx_cv_atomic_short=no
3374 else
3375 glibcxx_cv_atomic_short=yes
3376 fi
3377 fi
3378 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3379 rm -f conftest*
3381 cat > conftest.$ac_ext << EOF
3382 [#]line __oline__ "configure"
3383 int main()
3384 {
3385 // NB: _Atomic_word not necessarily int.
3386 typedef int atomic_type;
3387 atomic_type c1;
3388 atomic_type c2;
3389 atomic_type c3(0);
3390 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3391 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3392 __ATOMIC_RELAXED);
3393 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3394 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3396 return 0;
3397 }
3398 EOF
3400 AC_MSG_CHECKING([for atomic builtins for int])
3401 if AC_TRY_EVAL(ac_compile); then
3402 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3403 glibcxx_cv_atomic_int=no
3404 else
3405 glibcxx_cv_atomic_int=yes
3406 fi
3407 fi
3408 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3409 rm -f conftest*
3411 cat > conftest.$ac_ext << EOF
3412 [#]line __oline__ "configure"
3413 int main()
3414 {
3415 typedef long long atomic_type;
3416 atomic_type c1;
3417 atomic_type c2;
3418 atomic_type c3(0);
3419 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3420 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3421 __ATOMIC_RELAXED);
3422 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3423 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3425 return 0;
3426 }
3427 EOF
3429 AC_MSG_CHECKING([for atomic builtins for long long])
3430 if AC_TRY_EVAL(ac_compile); then
3431 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3432 glibcxx_cv_atomic_long_long=no
3433 else
3434 glibcxx_cv_atomic_long_long=yes
3435 fi
3436 fi
3437 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3438 rm -f conftest*
3440 fi
3442 CXXFLAGS="$old_CXXFLAGS"
3443 AC_LANG_RESTORE
3445 # Set atomicity_dir to builtins if all but the long long test above passes.
3446 if test $glibcxx_cv_atomic_bool = yes \
3447 && test $glibcxx_cv_atomic_short = yes \
3448 && test $glibcxx_cv_atomic_int = yes; then
3449 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3450 [Define if the compiler supports C++11 atomics.])
3451 atomicity_dir=cpu/generic/atomicity_builtins
3452 fi
3454 # If still generic, set to mutex.
3455 if test $atomicity_dir = "cpu/generic" ; then
3456 atomicity_dir=cpu/generic/atomicity_mutex
3457 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3458 if test "x$target_thread_file" = xsingle; then
3459 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3460 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3461 else
3462 AC_MSG_WARN([They will be faked using a mutex.])
3463 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3464 fi
3465 fi
3467 ])
3470 dnl
3471 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3472 dnl
3473 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3474 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3475 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3476 dnl Where DEFAULT is 'yes'.
3477 dnl
3478 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3479 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3481 if test x$enable_libstdcxx_visibility = xyes ; then
3482 dnl all hail libgfortran
3483 dnl Check whether the target supports hidden visibility.
3484 AC_CACHE_CHECK([whether the target supports hidden visibility],
3485 glibcxx_cv_have_attribute_visibility, [
3486 save_CFLAGS="$CFLAGS"
3487 CFLAGS="$CFLAGS -Werror"
3488 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3489 [], glibcxx_cv_have_attribute_visibility=yes,
3490 glibcxx_cv_have_attribute_visibility=no)
3491 CFLAGS="$save_CFLAGS"])
3492 if test $glibcxx_cv_have_attribute_visibility = no; then
3493 enable_libstdcxx_visibility=no
3494 fi
3495 fi
3497 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3498 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3499 ])
3502 dnl
3503 dnl Add version tags to symbols in shared library (or not), additionally
3504 dnl marking other symbols as private/local (or not).
3505 dnl
3506 dnl Sets libtool_VERSION, and determines shared library SONAME.
3507 dnl
3508 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3509 dnl
3510 dnl --enable-symvers=style adds a version script to the linker call when
3511 dnl creating the shared library. The choice of version script is
3512 dnl controlled by 'style'.
3513 dnl --disable-symvers does not.
3514 dnl
3515 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3516 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3517 dnl choose a default style based on linker characteristics. Passing
3518 dnl 'no' disables versioning.
3519 dnl
3520 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3522 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3523 [enables symbol versioning of the shared library],
3524 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3526 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3527 # don't know enough about $LD to do tricks...
3528 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3529 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3530 # with extern "C++" in version scripts.
3531 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3533 # Turn a 'yes' into a suitable default.
3534 if test x$enable_symvers = xyes ; then
3535 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3536 enable_symvers=no
3537 else
3538 if test $with_gnu_ld = yes ; then
3539 case ${target_os} in
3540 hpux*)
3541 enable_symvers=no ;;
3542 *)
3543 enable_symvers=gnu ;;
3544 esac
3545 else
3546 case ${target_os} in
3547 darwin*)
3548 enable_symvers=darwin ;;
3549 # Sun symbol versioning exists since Solaris 2.5.
3550 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3551 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3552 # version scripts, so disable symbol versioning if none can be
3553 # found.
3554 if test -z "$ac_cv_path_CXXFILT"; then
3555 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3556 AC_MSG_WARN([=== no GNU c++filt could be found.])
3557 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3558 enable_symvers=no
3559 else
3560 enable_symvers=sun
3561 fi
3562 ;;
3563 *)
3564 enable_symvers=no ;;
3565 esac
3566 fi
3567 fi
3568 fi
3570 # Check to see if 'darwin' or 'darwin-export' can win.
3571 if test x$enable_symvers = xdarwin-export ; then
3572 enable_symvers=darwin
3573 fi
3575 # Check if 'sun' was requested on non-Solaris 2 platforms.
3576 if test x$enable_symvers = xsun ; then
3577 case ${target_os} in
3578 solaris2*)
3579 # All fine.
3580 ;;
3581 *)
3582 # Unlikely to work.
3583 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3584 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3585 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3586 enable_symvers=no
3587 ;;
3588 esac
3589 fi
3591 # Check to see if 'gnu' can win.
3592 if test $enable_symvers = gnu ||
3593 test $enable_symvers = gnu-versioned-namespace ||
3594 test $enable_symvers = sun; then
3595 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3596 AC_MSG_CHECKING([for shared libgcc])
3597 ac_save_CFLAGS="$CFLAGS"
3598 CFLAGS=' -lgcc_s'
3599 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3600 CFLAGS="$ac_save_CFLAGS"
3601 if test $glibcxx_shared_libgcc = no; then
3602 cat > conftest.c <<EOF
3603 int main (void) { return 0; }
3604 EOF
3605 changequote(,)dnl
3606 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3607 -shared -shared-libgcc -o conftest.so \
3608 conftest.c -v 2>&1 >/dev/null \
3609 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3610 changequote([,])dnl
3611 rm -f conftest.c conftest.so
3612 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3613 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3614 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3615 CFLAGS="$ac_save_CFLAGS"
3616 fi
3617 fi
3618 AC_MSG_RESULT($glibcxx_shared_libgcc)
3620 # For GNU ld, we need at least this version. The format is described in
3621 # GLIBCXX_CHECK_LINKER_FEATURES above.
3622 glibcxx_min_gnu_ld_version=21400
3624 # If no shared libgcc, can't win.
3625 if test $glibcxx_shared_libgcc != yes; then
3626 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3627 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3628 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3629 enable_symvers=no
3630 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3631 : All interesting versions of Sun ld support sun style symbol versioning.
3632 elif test $with_gnu_ld != yes ; then
3633 # just fail for now
3634 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3635 AC_MSG_WARN([=== you are not using the GNU linker.])
3636 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3637 enable_symvers=no
3638 elif test $glibcxx_ld_is_gold = yes ; then
3639 : All versions of gold support symbol versioning.
3640 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3641 # The right tools, the right setup, but too old. Fallbacks?
3642 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3643 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3644 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3645 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3646 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3647 enable_symvers=no
3648 fi
3649 fi
3651 # For libtool versioning info, format is CURRENT:REVISION:AGE
3652 libtool_VERSION=6:22:0
3654 # Everything parsed; figure out what files and settings to use.
3655 case $enable_symvers in
3656 no)
3657 SYMVER_FILE=config/abi/pre/none.ver
3658 ;;
3659 gnu)
3660 SYMVER_FILE=config/abi/pre/gnu.ver
3661 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3662 [Define to use GNU versioning in the shared library.])
3663 ;;
3664 gnu-versioned-namespace)
3665 libtool_VERSION=7:0:0
3666 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3667 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3668 [Define to use GNU namespace versioning in the shared library.])
3669 ;;
3670 darwin)
3671 SYMVER_FILE=config/abi/pre/gnu.ver
3672 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3673 [Define to use darwin versioning in the shared library.])
3674 ;;
3675 sun)
3676 SYMVER_FILE=config/abi/pre/gnu.ver
3677 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3678 [Define to use Sun versioning in the shared library.])
3679 ;;
3680 esac
3682 if test x$enable_symvers != xno ; then
3683 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3684 [Define to use symbol versioning in the shared library.])
3685 fi
3687 AC_CACHE_CHECK([whether the target supports .symver directive],
3688 glibcxx_cv_have_as_symver_directive, [
3689 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3690 [], glibcxx_cv_have_as_symver_directive=yes,
3691 glibcxx_cv_have_as_symver_directive=no)])
3692 if test $glibcxx_cv_have_as_symver_directive = yes; then
3693 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3694 [Define to 1 if the target assembler supports .symver directive.])
3695 fi
3697 AC_SUBST(SYMVER_FILE)
3698 AC_SUBST(port_specific_symbol_files)
3699 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3700 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3701 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3702 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3703 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3704 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3706 if test $enable_symvers != no ; then
3707 case ${target_os} in
3708 # The Solaris 2 runtime linker doesn't support the GNU extension of
3709 # binding the same symbol to different versions
3710 solaris2*)
3711 ;;
3712 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3713 *)
3714 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3715 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3716 ;;
3717 esac
3718 fi
3720 # Now, set up compatibility support, if any.
3721 # In addition, need this to deal with std::size_t mangling in
3722 # src/compatibility.cc. In a perfect world, could use
3723 # typeid(std::size_t).name()[0] to do direct substitution.
3724 AC_MSG_CHECKING([for size_t as unsigned int])
3725 ac_save_CFLAGS="$CFLAGS"
3726 CFLAGS="-Werror"
3727 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3728 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3729 CFLAGS=$ac_save_CFLAGS
3730 if test "$glibcxx_size_t_is_i" = yes; then
3731 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3732 fi
3733 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3735 AC_MSG_CHECKING([for ptrdiff_t as int])
3736 ac_save_CFLAGS="$CFLAGS"
3737 CFLAGS="-Werror"
3738 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3739 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3740 CFLAGS=$ac_save_CFLAGS
3741 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3742 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3743 fi
3744 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3745 ])
3748 dnl
3749 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3750 dnl We must stage the required headers so that they will be installed
3751 dnl with the library (unlike libgcc, the STL implementation is provided
3752 dnl solely within headers). Since we must not inject random user-space
3753 dnl macro names into user-provided C++ code, we first stage into <file>-in
3754 dnl and process to <file> with an output command. The reason for a two-
3755 dnl stage process here is to correctly handle $srcdir!=$objdir without
3756 dnl having to write complex code (the sed commands to clean the macro
3757 dnl namespace are complex and fragile enough as it is). We must also
3758 dnl add a relative path so that -I- is supported properly.
3759 dnl
3760 dnl Substs:
3761 dnl thread_header
3762 dnl
3763 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3764 AC_MSG_CHECKING([for thread model used by GCC])
3765 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3766 AC_MSG_RESULT([$target_thread_file])
3767 GCC_AC_THREAD_HEADER([$target_thread_file])
3768 ])
3771 dnl
3772 dnl Check if gthread implementation defines the types and functions
3773 dnl required by the c++0x thread library. Conforming gthread
3774 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3775 dnl
3776 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3777 dnl
3778 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3779 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3781 if test x$enable_libstdcxx_threads = xauto ||
3782 test x$enable_libstdcxx_threads = xyes; then
3784 AC_LANG_SAVE
3785 AC_LANG_CPLUSPLUS
3787 ac_save_CXXFLAGS="$CXXFLAGS"
3788 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3789 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3791 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3792 case $target_thread_file in
3793 posix)
3794 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3795 esac
3797 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3799 AC_TRY_COMPILE([#include <unistd.h>],
3800 [
3801 // In case of POSIX threads check _POSIX_TIMEOUTS.
3802 #if (defined(_PTHREADS) \
3803 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3804 #error
3805 #endif
3806 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3808 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3809 [Define to 1 if mutex_timedlock is available.])
3811 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3812 else res_mutex_timedlock=no ; fi
3813 AC_MSG_RESULT([$res_mutex_timedlock])
3815 AC_MSG_CHECKING([for gthreads library])
3817 AC_TRY_COMPILE([#include "gthr.h"],
3818 [
3819 #ifndef __GTHREADS_CXX0X
3820 #error
3821 #endif
3822 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3823 else
3824 ac_has_gthreads=no
3825 fi
3827 AC_MSG_RESULT([$ac_has_gthreads])
3829 if test x"$ac_has_gthreads" = x"yes"; then
3830 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3831 [Define if gthreads library is available.])
3833 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
3834 AC_CHECK_TYPE([pthread_rwlock_t],
3835 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
3836 [Define if POSIX read/write locks are available in <gthr.h>.])],
3837 [],
3838 [#include "gthr.h"])
3839 fi
3841 CXXFLAGS="$ac_save_CXXFLAGS"
3842 AC_LANG_RESTORE
3843 ])
3846 # Check whether LC_MESSAGES is available in <locale.h>.
3847 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3848 #
3849 # This file file be copied and used freely without restrictions. It can
3850 # be used in projects which are not available under the GNU Public License
3851 # but which still want to provide support for the GNU gettext functionality.
3852 # Please note that the actual code is *not* freely available.
3853 AC_DEFUN([AC_LC_MESSAGES], [
3854 AC_CHECK_HEADER(locale.h, [
3855 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3856 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3857 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3858 if test $ac_cv_val_LC_MESSAGES = yes; then
3859 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3860 [Define if LC_MESSAGES is available in <locale.h>.])
3861 fi
3862 ])
3863 ])
3865 dnl
3866 dnl Check whether rdrand is supported in the assembler.
3867 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3868 AC_MSG_CHECKING([for rdrand support in assembler])
3869 AC_CACHE_VAL(ac_cv_x86_rdrand, [
3870 ac_cv_x86_rdrand=no
3871 case "$target" in
3872 i?86-*-* | \
3873 x86_64-*-*)
3874 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3875 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3876 esac
3877 ])
3878 if test $ac_cv_x86_rdrand = yes; then
3879 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3880 [ Defined if as can handle rdrand. ])
3881 fi
3882 AC_MSG_RESULT($ac_cv_x86_rdrand)
3883 ])
3885 dnl
3886 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3887 dnl
3888 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3890 AC_LANG_SAVE
3891 AC_LANG_CPLUSPLUS
3892 ac_save_CXXFLAGS="$CXXFLAGS"
3893 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3895 AC_MSG_CHECKING([for get_nprocs])
3896 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3897 GCC_TRY_COMPILE_OR_LINK(
3898 [#include <sys/sysinfo.h>],
3899 [int n = get_nprocs();],
3900 [glibcxx_cv_GET_NPROCS=yes],
3901 [glibcxx_cv_GET_NPROCS=no])
3902 ])
3903 if test $glibcxx_cv_GET_NPROCS = yes; then
3904 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3905 fi
3906 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3908 CXXFLAGS="$ac_save_CXXFLAGS"
3909 AC_LANG_RESTORE
3910 ])
3912 dnl
3913 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3914 dnl
3915 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3917 AC_LANG_SAVE
3918 AC_LANG_CPLUSPLUS
3919 ac_save_CXXFLAGS="$CXXFLAGS"
3920 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3922 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3923 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3924 GCC_TRY_COMPILE_OR_LINK(
3925 [#include <unistd.h>],
3926 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3927 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3928 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3929 ])
3930 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3931 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3932 fi
3933 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3935 CXXFLAGS="$ac_save_CXXFLAGS"
3936 AC_LANG_RESTORE
3937 ])
3939 dnl
3940 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
3941 dnl
3942 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
3944 AC_LANG_SAVE
3945 AC_LANG_CPLUSPLUS
3946 ac_save_CXXFLAGS="$CXXFLAGS"
3947 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3949 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
3950 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
3951 GCC_TRY_COMPILE_OR_LINK(
3952 [#include <unistd.h>],
3953 [int n = sysconf(_SC_NPROC_ONLN);],
3954 [glibcxx_cv_SC_NPROC_ONLN=yes],
3955 [glibcxx_cv_SC_NPROC_ONLN=no])
3956 ])
3957 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
3958 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
3959 fi
3960 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
3962 CXXFLAGS="$ac_save_CXXFLAGS"
3963 AC_LANG_RESTORE
3964 ])
3966 dnl
3967 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
3968 dnl
3969 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
3971 AC_LANG_SAVE
3972 AC_LANG_CPLUSPLUS
3973 ac_save_CXXFLAGS="$CXXFLAGS"
3974 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3976 AC_MSG_CHECKING([for pthreads_num_processors_np])
3977 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
3978 GCC_TRY_COMPILE_OR_LINK(
3979 [#include <pthread.h>],
3980 [int n = pthread_num_processors_np();],
3981 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
3982 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
3983 ])
3984 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
3985 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
3986 fi
3987 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
3989 CXXFLAGS="$ac_save_CXXFLAGS"
3990 AC_LANG_RESTORE
3991 ])
3993 dnl
3994 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
3995 dnl
3996 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
3998 AC_LANG_SAVE
3999 AC_LANG_CPLUSPLUS
4000 ac_save_CXXFLAGS="$CXXFLAGS"
4001 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4003 AC_MSG_CHECKING([for hw.ncpu sysctl])
4004 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
4005 GCC_TRY_COMPILE_OR_LINK(
4006 [
4007 #include <stddef.h>
4008 #include <sys/sysctl.h>
4009 ],
4010 [
4011 int count;
4012 size_t size = sizeof(count);
4013 int mib[] = { CTL_HW, HW_NCPU };
4014 sysctl(mib, 2, &count, &size, NULL, 0);
4015 ],
4016 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
4017 [glibcxx_cv_SYSCTL_HW_NCPU=no])
4018 ])
4019 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
4020 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
4021 fi
4022 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
4024 CXXFLAGS="$ac_save_CXXFLAGS"
4025 AC_LANG_RESTORE
4026 ])
4028 dnl
4029 dnl Check to see if python pretty printing can be activated.
4030 dnl
4031 dnl --with-python-dir=dir
4032 dnl installs directory into $prefix/dir
4033 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4035 AC_MSG_CHECKING([for custom python install directory])
4036 AC_ARG_WITH([python-dir],
4037 AS_HELP_STRING([--with-python-dir],
4038 [the location to install Python modules. This path is relative starting from the prefix.]),
4039 [with_python_dir=$withval], [with_python_dir="no"])
4040 AC_MSG_RESULT(${with_python_dir})
4042 # Needed for installing Python modules during make install.
4043 python_mod_dir="${with_python_dir}"
4044 AC_SUBST(python_mod_dir)
4045 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4046 ])
4048 dnl
4049 dnl Check to see if -Werror is disabled.
4050 dnl
4051 dnl --enable-werror/--disable-werror
4052 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4053 AC_MSG_CHECKING([for -Werror])
4054 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4055 AC_MSG_RESULT($enable_werror)
4056 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4057 ])
4059 dnl
4060 dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4061 dnl and define _GLIBCXX_USE_TMPNAM.
4062 dnl
4063 AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4064 dnl
4065 AC_LANG_SAVE
4066 AC_LANG_CPLUSPLUS
4067 ac_save_CXXFLAGS="$CXXFLAGS"
4068 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4069 dnl
4070 AC_MSG_CHECKING([for tmpnam])
4071 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
4072 GCC_TRY_COMPILE_OR_LINK(
4073 [#include <stdio.h>],
4074 [char *tmp = tmpnam(NULL);],
4075 [glibcxx_cv_TMPNAM=yes],
4076 [glibcxx_cv_TMPNAM=no])
4077 ])
4078 if test $glibcxx_cv_TMPNAM = yes; then
4079 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4080 fi
4081 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
4082 dnl
4083 CXXFLAGS="$ac_save_CXXFLAGS"
4084 AC_LANG_RESTORE
4085 ])
4087 dnl
4088 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4089 dnl Some versions of sdt.h were not compatible with C++11.
4090 dnl
4091 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
4092 AC_MSG_CHECKING([for suitable sys/sdt.h])
4093 # Note that this test has to be run with the C language.
4094 # Otherwise, sdt.h will try to include some headers from
4095 # libstdc++ itself.
4096 AC_LANG_SAVE
4097 AC_LANG_C
4098 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
4099 # Because we have to run the test in C, we use grep rather
4100 # than the compiler to check for the bug. The bug is that
4101 # were strings without trailing whitespace, causing g++
4102 # to look for operator"". The pattern searches for the fixed
4103 # output.
4104 AC_EGREP_CPP([ \",\" ], [
4105 #include <sys/sdt.h>
4106 int f() { STAP_PROBE(hi, bob); }
4107 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4108 ])
4109 AC_LANG_RESTORE
4110 if test $glibcxx_cv_sys_sdt_h = yes; then
4111 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4112 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4113 fi
4114 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
4115 ])
4117 dnl
4118 dnl Control whether the library should define symbols for old and new ABIs.
4119 dnl This affects definitions of strings, stringstreams and locale facets.
4120 dnl
4121 dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
4122 dnl
4123 dnl Defines:
4124 dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
4125 dnl
4126 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4127 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
4128 if test x$enable_symvers = xgnu-versioned-namespace; then
4129 # gnu-versioned-namespace is incompatible with the dual ABI.
4130 enable_libstdcxx_dual_abi="no"
4131 fi
4132 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4133 AC_MSG_NOTICE([dual ABI is disabled])
4134 default_libstdcxx_abi="gcc4-compatible"
4135 fi
4136 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
4137 ])
4139 dnl
4140 dnl Check to see which ABI should be enabled by default.
4141 dnl
4142 dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
4143 dnl
4144 dnl Defines:
4145 dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4146 dnl
4147 AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4148 if test x$enable_libstdcxx_dual_abi = xyes; then
4149 AC_MSG_CHECKING([for default std::string ABI to use])
4150 AC_ARG_WITH([default-libstdcxx-abi],
4151 AS_HELP_STRING([--with-default-libstdcxx-abi],
4152 [set the std::string ABI to use by default]),
4153 [case "$withval" in
4154 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4155 new|cxx11) default_libstdcxx_abi="new" ;;
4156 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4157 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4158 esac
4159 ],
4160 [default_libstdcxx_abi="new"])
4161 AC_MSG_RESULT(${default_libstdcxx_abi})
4162 fi
4163 if test $default_libstdcxx_abi = "new"; then
4164 glibcxx_cxx11_abi=1
4165 glibcxx_cxx98_abi=0
4166 else
4167 glibcxx_cxx11_abi=0
4168 glibcxx_cxx98_abi=1
4169 fi
4170 AC_SUBST(glibcxx_cxx98_abi)
4171 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4172 ])
4174 dnl
4175 dnl Check to see whether to build libstdc++fs.a
4176 dnl
4177 dnl --enable-libstdcxx-filesystem-ts
4178 dnl
4179 AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4180 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4181 [turns on ISO/IEC TS 18822 support],
4182 [permit yes|no|auto])
4184 AC_MSG_CHECKING([whether to build Filesystem TS support])
4185 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4186 enable_libstdcxx_filesystem_ts=no
4187 fi
4188 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4189 case "${target_os}" in
4190 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4191 enable_libstdcxx_filesystem_ts=yes
4192 ;;
4193 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
4194 enable_libstdcxx_filesystem_ts=yes
4195 ;;
4196 solaris*)
4197 enable_libstdcxx_filesystem_ts=yes
4198 ;;
4199 *)
4200 enable_libstdcxx_filesystem_ts=no
4201 ;;
4202 esac
4203 fi
4204 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4205 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4206 ])
4208 dnl
4209 dnl Check whether the library calls required by the Filesystem TS are present
4210 dnl and define _GLIBCXX_USE_REALPATH and _GLIBCXX_USE_UTIMENSAT.
4211 dnl
4212 AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4213 dnl
4214 AC_LANG_SAVE
4215 AC_LANG_CPLUSPLUS
4216 ac_save_CXXFLAGS="$CXXFLAGS"
4217 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4218 dnl
4219 AC_MSG_CHECKING([for struct dirent.d_type])
4220 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
4221 GCC_TRY_COMPILE_OR_LINK(
4222 [#include <dirent.h>],
4223 [
4224 struct dirent d;
4225 if (sizeof d.d_type) return 0;
4226 ],
4227 [glibcxx_cv_dirent_d_type=yes],
4228 [glibcxx_cv_dirent_d_type=no])
4229 ])
4230 if test $glibcxx_cv_dirent_d_type = yes; then
4231 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
4232 fi
4233 AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
4234 dnl
4235 AC_MSG_CHECKING([for realpath])
4236 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
4237 GCC_TRY_COMPILE_OR_LINK(
4238 [
4239 #include <stdlib.h>
4240 #include <unistd.h>
4241 ],
4242 [
4243 #if _XOPEN_VERSION < 500
4244 #error
4245 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4246 char *tmp = realpath((const char*)NULL, (char*)NULL);
4247 #else
4248 #error
4249 #endif
4250 ],
4251 [glibcxx_cv_realpath=yes],
4252 [glibcxx_cv_realpath=no])
4253 ])
4254 if test $glibcxx_cv_realpath = yes; then
4255 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
4256 fi
4257 AC_MSG_RESULT($glibcxx_cv_realpath)
4258 dnl
4259 AC_MSG_CHECKING([for utimensat])
4260 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl
4261 GCC_TRY_COMPILE_OR_LINK(
4262 [
4263 #include <fcntl.h>
4264 #include <sys/stat.h>
4265 ],
4266 [
4267 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4268 int i = utimensat(AT_FDCWD, "path", ts, 0);
4269 ],
4270 [glibcxx_cv_utimensat=yes],
4271 [glibcxx_cv_utimensat=no])
4272 ])
4273 if test $glibcxx_cv_utimensat = yes; then
4274 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4275 fi
4276 AC_MSG_RESULT($glibcxx_cv_utimensat)
4277 dnl
4278 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec])
4279 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl
4280 GCC_TRY_COMPILE_OR_LINK(
4281 [ #include <sys/stat.h> ],
4282 [
4283 struct stat st;
4284 return st.st_mtim.tv_nsec;
4285 ],
4286 [glibcxx_cv_st_mtim=yes],
4287 [glibcxx_cv_st_mtim=no])
4288 ])
4289 if test $glibcxx_cv_st_mtim = yes; then
4290 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4291 fi
4292 AC_MSG_RESULT($glibcxx_cv_st_mtim)
4293 dnl
4294 AC_MSG_CHECKING([for fchmod])
4295 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl
4296 GCC_TRY_COMPILE_OR_LINK(
4297 [#include <sys/stat.h>],
4298 [fchmod(1, S_IWUSR);],
4299 [glibcxx_cv_fchmod=yes],
4300 [glibcxx_cv_fchmod=no])
4301 ])
4302 if test $glibcxx_cv_fchmod = yes; then
4303 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4304 fi
4305 AC_MSG_RESULT($glibcxx_cv_fchmod)
4306 dnl
4307 AC_MSG_CHECKING([for fchmodat])
4308 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl
4309 GCC_TRY_COMPILE_OR_LINK(
4310 [
4311 #include <fcntl.h>
4312 #include <sys/stat.h>
4313 ],
4314 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4315 [glibcxx_cv_fchmodat=yes],
4316 [glibcxx_cv_fchmodat=no])
4317 ])
4318 if test $glibcxx_cv_fchmodat = yes; then
4319 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4320 fi
4321 AC_MSG_RESULT($glibcxx_cv_fchmodat)
4322 dnl
4323 AC_MSG_CHECKING([for sendfile that can copy files])
4324 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl
4325 case "${target_os}" in
4326 gnu* | linux* | solaris*)
4327 GCC_TRY_COMPILE_OR_LINK(
4328 [#include <sys/sendfile.h>],
4329 [sendfile(1, 2, (off_t*)NULL, sizeof 1);],
4330 [glibcxx_cv_sendfile=yes],
4331 [glibcxx_cv_sendfile=no])
4332 ;;
4333 *)
4334 glibcxx_cv_sendfile=no
4335 ;;
4336 esac
4337 ])
4338 if test $glibcxx_cv_sendfile = yes; then
4339 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/stat.h>.])
4340 fi
4341 AC_MSG_RESULT($glibcxx_cv_sendfile)
4342 dnl
4343 CXXFLAGS="$ac_save_CXXFLAGS"
4344 AC_LANG_RESTORE
4345 ])
4347 # Macros from the top-level gcc directory.
4348 m4_include([../config/gc++filt.m4])
4349 m4_include([../config/tls.m4])
4350 m4_include([../config/gthr.m4])