| blob | 0824243ced9c5a73676974359f355dbb7bc35713 |
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 <stdlib.h> of lldiv_t, et. al.
1063 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++98])
1064 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx98, [
1065 GCC_TRY_COMPILE_OR_LINK(
1066 [#include <stdlib.h>
1067 volatile float f;
1068 volatile long double ld;
1069 volatile unsigned long long ll;
1070 lldiv_t mydivt;],
1071 [char* tmp;
1072 f = strtof("gnu", &tmp);
1073 ld = strtold("gnu", &tmp);
1074 ll = strtoll("gnu", &tmp, 10);
1075 ll = strtoull("gnu", &tmp, 10);
1076 ll = llabs(10);
1077 mydivt = lldiv(10,1);
1078 ll = mydivt.quot;
1079 ll = mydivt.rem;
1080 ll = atoll("10");
1081 _Exit(0);
1082 ], [glibcxx_cv_c99_stdlib_cxx98=yes], [glibcxx_cv_c99_stdlib_cxx98=no])
1083 ])
1084 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx98)
1085 if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then
1086 AC_DEFINE(_GLIBCXX98_USE_C99_STDLIB, 1,
1087 [Define if C99 functions or macros in <stdlib.h> should be imported
1088 in <cstdlib> in namespace std for C++98.])
1089 fi
1091 # Check for the existence in <wchar.h> of wcstold, etc.
1092 if test x"$ac_has_wchar_h" = xyes &&
1093 test x"$ac_has_wctype_h" = xyes; then
1094 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++98])
1095 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx98, [
1096 AC_TRY_COMPILE([#include <wchar.h>
1097 namespace test
1098 {
1099 using ::wcstold;
1100 using ::wcstoll;
1101 using ::wcstoull;
1102 }
1103 ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no])
1104 ])
1106 # Checks for wide character functions that may not be present.
1107 # Injection of these is wrapped with guard macros.
1108 # NB: only put functions here, instead of immediately above, if
1109 # absolutely necessary.
1110 AC_TRY_COMPILE([#include <wchar.h>
1111 namespace test { using ::vfwscanf; }], [],
1112 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1114 AC_TRY_COMPILE([#include <wchar.h>
1115 namespace test { using ::vswscanf; }], [],
1116 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1118 AC_TRY_COMPILE([#include <wchar.h>
1119 namespace test { using ::vwscanf; }], [],
1120 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1122 AC_TRY_COMPILE([#include <wchar.h>
1123 namespace test { using ::wcstof; }], [],
1124 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1126 AC_TRY_COMPILE([#include <wctype.h>],
1127 [wint_t t; int i = iswblank(t);],
1128 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1130 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx98)
1131 if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then
1132 AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1,
1133 [Define if C99 functions or macros in <wchar.h> should be imported
1134 in <cwchar> in namespace std for C++98.])
1135 fi
1136 fi
1138 # Option parsed, now set things appropriately.
1139 if test x"$glibcxx_cv_c99_math_cxx98" = x"no" ||
1140 test x"$glibcxx_cv_c99_complex_cxx98" = x"no" ||
1141 test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" ||
1142 test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" ||
1143 test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then
1144 enable_c99=no;
1145 else
1146 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1147 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1148 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1149 fi
1151 gcc_no_link="$ac_save_gcc_no_link"
1152 LIBS="$ac_save_LIBS"
1153 CXXFLAGS="$ac_save_CXXFLAGS"
1154 AC_LANG_RESTORE
1156 AC_LANG_SAVE
1157 AC_LANG_CPLUSPLUS
1159 # Use -std=c++11 and test again for C99 library feature in C++11 mode.
1160 # For the reasons given above we use -std=c++11 not -std=gnu++11.
1161 ac_save_CXXFLAGS="$CXXFLAGS"
1162 CXXFLAGS="$CXXFLAGS -std=c++11"
1163 ac_save_LIBS="$LIBS"
1164 ac_save_gcc_no_link="$gcc_no_link"
1166 if test x$gcc_no_link != xyes; then
1167 # Use -fno-exceptions to that the C driver can link these tests without
1168 # hitting undefined references to personality routines.
1169 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1170 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
1171 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
1172 gcc_no_link=yes
1173 ])
1174 fi
1176 # Check for the existence of <math.h> functions used if C99 is enabled.
1177 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++11])
1178 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx11, [
1179 GCC_TRY_COMPILE_OR_LINK(
1180 [#include <math.h>
1181 volatile double d1, d2;
1182 volatile int i;],
1183 [i = fpclassify(d1);
1184 i = isfinite(d1);
1185 i = isinf(d1);
1186 i = isnan(d1);
1187 i = isnormal(d1);
1188 i = signbit(d1);
1189 i = isgreater(d1, d2);
1190 i = isgreaterequal(d1, d2);
1191 i = isless(d1, d2);
1192 i = islessequal(d1, d2);
1193 i = islessgreater(d1, d2);
1194 i = islessgreater(d1, d2);
1195 i = isunordered(d1, d2);
1196 ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no])
1197 ])
1198 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx11)
1199 if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then
1200 AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1,
1201 [Define if C99 functions or macros in <math.h> should be imported
1202 in <cmath> in namespace std for C++11.])
1203 fi
1205 # Check for the existence of <complex.h> complex math functions.
1206 # This is necessary even though libstdc++ uses the builtin versions
1207 # of these functions, because if the builtin cannot be used, a reference
1208 # to the library function is emitted.
1209 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
1210 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1211 if test x"$ac_has_complex_h" = x"yes"; then
1212 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++11])
1213 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx11, [
1214 GCC_TRY_COMPILE_OR_LINK(
1215 [#include <complex.h>
1216 typedef __complex__ float float_type;
1217 typedef __complex__ double double_type;
1218 typedef __complex__ long double ld_type;
1219 volatile float_type tmpf;
1220 volatile double_type tmpd;
1221 volatile ld_type tmpld;
1222 volatile float f;
1223 volatile double d;
1224 volatile long double ld;],
1225 [f = cabsf(tmpf);
1226 f = cargf(tmpf);
1227 tmpf = ccosf(tmpf);
1228 tmpf = ccoshf(tmpf);
1229 tmpf = cexpf(tmpf);
1230 tmpf = clogf(tmpf);
1231 tmpf = csinf(tmpf);
1232 tmpf = csinhf(tmpf);
1233 tmpf = csqrtf(tmpf);
1234 tmpf = ctanf(tmpf);
1235 tmpf = ctanhf(tmpf);
1236 tmpf = cpowf(tmpf, tmpf);
1237 tmpf = cprojf(tmpf);
1238 d = cabs(tmpd);
1239 d = carg(tmpd);
1240 tmpd = ccos(tmpd);
1241 tmpd = ccosh(tmpd);
1242 tmpd = cexp(tmpd);
1243 tmpd = clog(tmpd);
1244 tmpd = csin(tmpd);
1245 tmpd = csinh(tmpd);
1246 tmpd = csqrt(tmpd);
1247 tmpd = ctan(tmpd);
1248 tmpd = ctanh(tmpd);
1249 tmpd = cpow(tmpd, tmpd);
1250 tmpd = cproj(tmpd);
1251 ld = cabsl(tmpld);
1252 ld = cargl(tmpld);
1253 tmpld = ccosl(tmpld);
1254 tmpld = ccoshl(tmpld);
1255 tmpld = cexpl(tmpld);
1256 tmpld = clogl(tmpld);
1257 tmpld = csinl(tmpld);
1258 tmpld = csinhl(tmpld);
1259 tmpld = csqrtl(tmpld);
1260 tmpld = ctanl(tmpld);
1261 tmpld = ctanhl(tmpld);
1262 tmpld = cpowl(tmpld, tmpld);
1263 tmpld = cprojl(tmpld);
1264 ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no])
1265 ])
1266 fi
1267 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx11)
1268 if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then
1269 AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1,
1270 [Define if C99 functions in <complex.h> should be used in
1271 <complex> for C++11. Using compiler builtins for these functions
1272 requires corresponding C99 library functions to be present.])
1273 fi
1275 # Check for the existence in <stdio.h> of vscanf, et. al.
1276 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++11])
1277 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx11, [
1278 GCC_TRY_COMPILE_OR_LINK(
1279 [#include <stdio.h>
1280 #include <stdarg.h>
1281 void foo(char* fmt, ...)
1282 {
1283 va_list args; va_start(args, fmt);
1284 vfscanf(stderr, "%i", args);
1285 vscanf("%i", args);
1286 vsnprintf(fmt, 0, "%i", args);
1287 vsscanf(fmt, "%i", args);
1288 snprintf(fmt, 0, "%i");
1289 }], [],
1290 [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no])
1291 ])
1292 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx11)
1293 if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then
1294 AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1,
1295 [Define if C99 functions or macros in <stdio.h> should be imported
1296 in <cstdio> in namespace std for C++11.])
1297 fi
1299 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1300 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++11])
1301 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx11, [
1302 GCC_TRY_COMPILE_OR_LINK(
1303 [#include <stdlib.h>
1304 volatile float f;
1305 volatile long double ld;
1306 volatile unsigned long long ll;
1307 lldiv_t mydivt;],
1308 [char* tmp;
1309 f = strtof("gnu", &tmp);
1310 ld = strtold("gnu", &tmp);
1311 ll = strtoll("gnu", &tmp, 10);
1312 ll = strtoull("gnu", &tmp, 10);
1313 ll = llabs(10);
1314 mydivt = lldiv(10,1);
1315 ll = mydivt.quot;
1316 ll = mydivt.rem;
1317 ll = atoll("10");
1318 _Exit(0);
1319 ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no])
1320 ])
1321 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx11)
1322 if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then
1323 AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1,
1324 [Define if C99 functions or macros in <stdlib.h> should be imported
1325 in <cstdlib> in namespace std for C++11.])
1326 fi
1328 # Check for the existence in <wchar.h> of wcstold, etc.
1329 if test x"$ac_has_wchar_h" = xyes &&
1330 test x"$ac_has_wctype_h" = xyes; then
1331 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++11])
1332 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx11, [
1333 AC_TRY_COMPILE([#include <wchar.h>
1334 namespace test
1335 {
1336 using ::wcstold;
1337 using ::wcstoll;
1338 using ::wcstoull;
1339 }
1340 ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no])
1341 ])
1343 # Checks for wide character functions that may not be present.
1344 # Injection of these is wrapped with guard macros.
1345 # NB: only put functions here, instead of immediately above, if
1346 # absolutely necessary.
1347 AC_TRY_COMPILE([#include <wchar.h>
1348 namespace test { using ::vfwscanf; }], [],
1349 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1351 AC_TRY_COMPILE([#include <wchar.h>
1352 namespace test { using ::vswscanf; }], [],
1353 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1355 AC_TRY_COMPILE([#include <wchar.h>
1356 namespace test { using ::vwscanf; }], [],
1357 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1359 AC_TRY_COMPILE([#include <wchar.h>
1360 namespace test { using ::wcstof; }], [],
1361 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1363 AC_TRY_COMPILE([#include <wctype.h>],
1364 [wint_t t; int i = iswblank(t);],
1365 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1367 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx11)
1368 if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then
1369 AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1,
1370 [Define if C99 functions or macros in <wchar.h> should be imported
1371 in <cwchar> in namespace std for C++11.])
1372 fi
1373 fi
1375 gcc_no_link="$ac_save_gcc_no_link"
1376 LIBS="$ac_save_LIBS"
1377 CXXFLAGS="$ac_save_CXXFLAGS"
1378 AC_LANG_RESTORE
1379 fi
1381 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1382 AC_MSG_RESULT($enable_c99)
1383 ])
1386 dnl
1387 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1388 dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1389 dnl in the C++11 standard.
1390 dnl
1391 dnl --enable-libstdcxx-time
1392 dnl --enable-libstdcxx-time=yes
1393 dnl checks for the availability of monotonic and realtime clocks,
1394 dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
1395 dnl links in the latter.
1396 dnl --enable-libstdcxx-time=rt
1397 dnl also searches (and, if needed, links) librt. Note that this is
1398 dnl not always desirable because, in glibc 2.16 and earlier, for
1399 dnl example, in turn it triggers the linking of libpthread too,
1400 dnl which activates locking,
1401 dnl a large overhead for single-thread programs.
1402 dnl --enable-libstdcxx-time=no
1403 dnl --disable-libstdcxx-time
1404 dnl disables the checks completely
1405 dnl
1406 dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1407 dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1408 dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1409 dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1410 dnl
1411 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1413 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
1414 [use KIND for check type],
1415 [permit yes|no|rt])
1417 AC_LANG_SAVE
1418 AC_LANG_CPLUSPLUS
1419 ac_save_CXXFLAGS="$CXXFLAGS"
1420 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1421 ac_save_LIBS="$LIBS"
1423 ac_has_clock_monotonic=no
1424 ac_has_clock_realtime=no
1425 ac_has_nanosleep=no
1426 ac_has_sched_yield=no
1428 if test x"$enable_libstdcxx_time" = x"auto"; then
1430 case "${target_os}" in
1431 cygwin*)
1432 ac_has_nanosleep=yes
1433 ;;
1434 darwin*)
1435 ac_has_nanosleep=yes
1436 ac_has_sched_yield=yes
1437 ;;
1438 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
1439 AC_MSG_CHECKING([for at least GNU libc 2.17])
1440 AC_TRY_COMPILE(
1441 [#include <features.h>],
1442 [
1443 #if ! __GLIBC_PREREQ(2, 17)
1444 #error
1445 #endif
1446 ],
1447 [glibcxx_glibc217=yes], [glibcxx_glibc217=no])
1448 AC_MSG_RESULT($glibcxx_glibc217)
1450 if test x"$glibcxx_glibc217" = x"yes"; then
1451 ac_has_clock_monotonic=yes
1452 ac_has_clock_realtime=yes
1453 fi
1454 ac_has_nanosleep=yes
1455 ac_has_sched_yield=yes
1456 ;;
1457 freebsd*|netbsd*|dragonfly*)
1458 ac_has_clock_monotonic=yes
1459 ac_has_clock_realtime=yes
1460 ac_has_nanosleep=yes
1461 ac_has_sched_yield=yes
1462 ;;
1463 openbsd*)
1464 ac_has_clock_monotonic=yes
1465 ac_has_clock_realtime=yes
1466 ac_has_nanosleep=yes
1467 ;;
1468 solaris*)
1469 GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt"
1470 ac_has_clock_monotonic=yes
1471 ac_has_clock_realtime=yes
1472 ac_has_nanosleep=yes
1473 ac_has_sched_yield=yes
1474 ;;
1475 esac
1477 elif test x"$enable_libstdcxx_time" != x"no"; then
1479 if test x"$enable_libstdcxx_time" = x"rt"; then
1480 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1481 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1482 else
1483 AC_SEARCH_LIBS(clock_gettime, [posix4])
1484 AC_SEARCH_LIBS(nanosleep, [posix4])
1485 fi
1487 case "$ac_cv_search_clock_gettime" in
1488 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1489 ;;
1490 esac
1491 case "$ac_cv_search_nanosleep" in
1492 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1493 ;;
1494 esac
1496 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1498 case "$ac_cv_search_sched_yield" in
1499 -lposix4*)
1500 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1501 ac_has_sched_yield=yes
1502 ;;
1503 -lrt*)
1504 if test x"$enable_libstdcxx_time" = x"rt"; then
1505 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1506 ac_has_sched_yield=yes
1507 fi
1508 ;;
1509 *)
1510 ac_has_sched_yield=yes
1511 ;;
1512 esac
1514 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1516 if test x"$ac_has_unistd_h" = x"yes"; then
1517 AC_MSG_CHECKING([for monotonic clock])
1518 AC_TRY_LINK(
1519 [#include <unistd.h>
1520 #include <time.h>
1521 ],
1522 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1523 timespec tp;
1524 #endif
1525 clock_gettime(CLOCK_MONOTONIC, &tp);
1526 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1528 AC_MSG_RESULT($ac_has_clock_monotonic)
1530 AC_MSG_CHECKING([for realtime clock])
1531 AC_TRY_LINK(
1532 [#include <unistd.h>
1533 #include <time.h>
1534 ],
1535 [#if _POSIX_TIMERS > 0
1536 timespec tp;
1537 #endif
1538 clock_gettime(CLOCK_REALTIME, &tp);
1539 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1541 AC_MSG_RESULT($ac_has_clock_realtime)
1543 AC_MSG_CHECKING([for nanosleep])
1544 AC_TRY_LINK(
1545 [#include <unistd.h>
1546 #include <time.h>
1547 ],
1548 [#if _POSIX_TIMERS > 0
1549 timespec tp;
1550 #endif
1551 nanosleep(&tp, 0);
1552 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1554 AC_MSG_RESULT($ac_has_nanosleep)
1555 fi
1556 fi
1558 if test x"$ac_has_clock_monotonic" != x"yes"; then
1559 case ${target_os} in
1560 linux*)
1561 AC_MSG_CHECKING([for clock_gettime syscall])
1562 AC_TRY_COMPILE(
1563 [#include <unistd.h>
1564 #include <time.h>
1565 #include <sys/syscall.h>
1566 ],
1567 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1568 timespec tp;
1569 #endif
1570 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
1571 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
1572 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no])
1573 AC_MSG_RESULT($ac_has_clock_monotonic_syscall)
1574 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then
1575 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
1576 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ])
1577 ac_has_clock_monotonic=yes
1578 ac_has_clock_realtime=yes
1579 fi;;
1580 esac
1581 fi
1583 if test x"$ac_has_clock_monotonic" = x"yes"; then
1584 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1585 [ Defined if clock_gettime has monotonic clock support. ])
1586 fi
1588 if test x"$ac_has_clock_realtime" = x"yes"; then
1589 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1590 [ Defined if clock_gettime has realtime clock support. ])
1591 fi
1593 if test x"$ac_has_sched_yield" = x"yes"; then
1594 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1595 [ Defined if sched_yield is available. ])
1596 fi
1598 if test x"$ac_has_nanosleep" = x"yes"; then
1599 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1600 [ Defined if nanosleep is available. ])
1601 else
1602 AC_MSG_CHECKING([for sleep])
1603 AC_TRY_COMPILE([#include <unistd.h>],
1604 [sleep(1)],
1605 [ac_has_sleep=yes],[ac_has_sleep=no])
1606 if test x"$ac_has_sleep" = x"yes"; then
1607 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1608 fi
1609 AC_MSG_RESULT($ac_has_sleep)
1610 AC_MSG_CHECKING([for usleep])
1611 AC_TRY_COMPILE([#include <unistd.h>],
1612 [sleep(1);
1613 usleep(100);],
1614 [ac_has_usleep=yes],[ac_has_usleep=no])
1615 if test x"$ac_has_usleep" = x"yes"; then
1616 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1617 fi
1618 AC_MSG_RESULT($ac_has_usleep)
1619 fi
1621 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1622 AC_MSG_CHECKING([for Sleep])
1623 AC_TRY_COMPILE([#include <windows.h>],
1624 [Sleep(1)],
1625 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1626 if test x"$ac_has_win32_sleep" = x"yes"; then
1627 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1628 fi
1629 AC_MSG_RESULT($ac_has_win32_sleep)
1630 fi
1632 AC_SUBST(GLIBCXX_LIBS)
1634 CXXFLAGS="$ac_save_CXXFLAGS"
1635 LIBS="$ac_save_LIBS"
1636 AC_LANG_RESTORE
1637 ])
1639 dnl
1640 dnl Check for gettimeofday, used in the implementation of 20.11.7
1641 dnl [time.clock] in the C++11 standard.
1642 dnl
1643 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1645 AC_MSG_CHECKING([for gettimeofday])
1647 AC_LANG_SAVE
1648 AC_LANG_CPLUSPLUS
1649 ac_save_CXXFLAGS="$CXXFLAGS"
1650 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1652 ac_has_gettimeofday=no;
1653 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1654 if test x"$ac_has_sys_time_h" = x"yes"; then
1655 AC_MSG_CHECKING([for gettimeofday])
1656 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1657 [timeval tv; gettimeofday(&tv, 0);],
1658 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1660 AC_MSG_RESULT($ac_has_gettimeofday)
1661 fi
1663 if test x"$ac_has_gettimeofday" = x"yes"; then
1664 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1665 [ Defined if gettimeofday is available. ])
1666 fi
1668 CXXFLAGS="$ac_save_CXXFLAGS"
1669 AC_LANG_RESTORE
1670 ])
1672 dnl
1673 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1674 dnl facilities in Chapter 8, "C compatibility".
1675 dnl
1676 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1678 AC_LANG_SAVE
1679 AC_LANG_CPLUSPLUS
1681 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1682 # undefined and fake C99 facilities may be spuriously enabled.
1683 ac_save_CXXFLAGS="$CXXFLAGS"
1684 CXXFLAGS="$CXXFLAGS -std=c++98"
1686 # Check for the existence of <complex.h> complex math functions used
1687 # by tr1/complex.
1688 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1689 ac_c99_complex_tr1=no;
1690 if test x"$ac_has_complex_h" = x"yes"; then
1691 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1692 AC_TRY_COMPILE([#include <complex.h>],
1693 [typedef __complex__ float float_type; float_type tmpf;
1694 cacosf(tmpf);
1695 casinf(tmpf);
1696 catanf(tmpf);
1697 cacoshf(tmpf);
1698 casinhf(tmpf);
1699 catanhf(tmpf);
1700 typedef __complex__ double double_type; double_type tmpd;
1701 cacos(tmpd);
1702 casin(tmpd);
1703 catan(tmpd);
1704 cacosh(tmpd);
1705 casinh(tmpd);
1706 catanh(tmpd);
1707 typedef __complex__ long double ld_type; ld_type tmpld;
1708 cacosl(tmpld);
1709 casinl(tmpld);
1710 catanl(tmpld);
1711 cacoshl(tmpld);
1712 casinhl(tmpld);
1713 catanhl(tmpld);
1714 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1715 fi
1716 AC_MSG_RESULT($ac_c99_complex_tr1)
1717 if test x"$ac_c99_complex_tr1" = x"yes"; then
1718 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1719 [Define if C99 functions in <complex.h> should be used in
1720 <tr1/complex>. Using compiler builtins for these functions
1721 requires corresponding C99 library functions to be present.])
1722 fi
1724 # Check for the existence of <ctype.h> functions.
1725 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1726 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1727 AC_TRY_COMPILE([#include <ctype.h>],
1728 [int ch;
1729 int ret;
1730 ret = isblank(ch);
1731 ],[glibcxx_cv_c99_ctype_tr1=yes],
1732 [glibcxx_cv_c99_ctype_tr1=no])
1733 ])
1734 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1735 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1736 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1737 [Define if C99 functions in <ctype.h> should be imported in
1738 <tr1/cctype> in namespace std::tr1.])
1739 fi
1741 # Check for the existence of <fenv.h> functions.
1742 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1743 ac_c99_fenv_tr1=no;
1744 if test x"$ac_has_fenv_h" = x"yes"; then
1745 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1746 AC_TRY_COMPILE([#include <fenv.h>],
1747 [int except, mode;
1748 fexcept_t* pflag;
1749 fenv_t* penv;
1750 int ret;
1751 ret = feclearexcept(except);
1752 ret = fegetexceptflag(pflag, except);
1753 ret = feraiseexcept(except);
1754 ret = fesetexceptflag(pflag, except);
1755 ret = fetestexcept(except);
1756 ret = fegetround();
1757 ret = fesetround(mode);
1758 ret = fegetenv(penv);
1759 ret = feholdexcept(penv);
1760 ret = fesetenv(penv);
1761 ret = feupdateenv(penv);
1762 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1763 fi
1764 AC_MSG_RESULT($ac_c99_fenv_tr1)
1765 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1766 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1767 [Define if C99 functions in <fenv.h> should be imported in
1768 <tr1/cfenv> in namespace std::tr1.])
1769 fi
1771 # Check for the existence of <stdint.h> types.
1772 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1773 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1774 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1775 #define __STDC_CONSTANT_MACROS
1776 #include <stdint.h>],
1777 [typedef int8_t my_int8_t;
1778 my_int8_t i8 = INT8_MIN;
1779 i8 = INT8_MAX;
1780 typedef int16_t my_int16_t;
1781 my_int16_t i16 = INT16_MIN;
1782 i16 = INT16_MAX;
1783 typedef int32_t my_int32_t;
1784 my_int32_t i32 = INT32_MIN;
1785 i32 = INT32_MAX;
1786 typedef int64_t my_int64_t;
1787 my_int64_t i64 = INT64_MIN;
1788 i64 = INT64_MAX;
1789 typedef int_fast8_t my_int_fast8_t;
1790 my_int_fast8_t if8 = INT_FAST8_MIN;
1791 if8 = INT_FAST8_MAX;
1792 typedef int_fast16_t my_int_fast16_t;
1793 my_int_fast16_t if16 = INT_FAST16_MIN;
1794 if16 = INT_FAST16_MAX;
1795 typedef int_fast32_t my_int_fast32_t;
1796 my_int_fast32_t if32 = INT_FAST32_MIN;
1797 if32 = INT_FAST32_MAX;
1798 typedef int_fast64_t my_int_fast64_t;
1799 my_int_fast64_t if64 = INT_FAST64_MIN;
1800 if64 = INT_FAST64_MAX;
1801 typedef int_least8_t my_int_least8_t;
1802 my_int_least8_t il8 = INT_LEAST8_MIN;
1803 il8 = INT_LEAST8_MAX;
1804 typedef int_least16_t my_int_least16_t;
1805 my_int_least16_t il16 = INT_LEAST16_MIN;
1806 il16 = INT_LEAST16_MAX;
1807 typedef int_least32_t my_int_least32_t;
1808 my_int_least32_t il32 = INT_LEAST32_MIN;
1809 il32 = INT_LEAST32_MAX;
1810 typedef int_least64_t my_int_least64_t;
1811 my_int_least64_t il64 = INT_LEAST64_MIN;
1812 il64 = INT_LEAST64_MAX;
1813 typedef intmax_t my_intmax_t;
1814 my_intmax_t im = INTMAX_MAX;
1815 im = INTMAX_MIN;
1816 typedef intptr_t my_intptr_t;
1817 my_intptr_t ip = INTPTR_MAX;
1818 ip = INTPTR_MIN;
1819 typedef uint8_t my_uint8_t;
1820 my_uint8_t ui8 = UINT8_MAX;
1821 ui8 = UINT8_MAX;
1822 typedef uint16_t my_uint16_t;
1823 my_uint16_t ui16 = UINT16_MAX;
1824 ui16 = UINT16_MAX;
1825 typedef uint32_t my_uint32_t;
1826 my_uint32_t ui32 = UINT32_MAX;
1827 ui32 = UINT32_MAX;
1828 typedef uint64_t my_uint64_t;
1829 my_uint64_t ui64 = UINT64_MAX;
1830 ui64 = UINT64_MAX;
1831 typedef uint_fast8_t my_uint_fast8_t;
1832 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1833 uif8 = UINT_FAST8_MAX;
1834 typedef uint_fast16_t my_uint_fast16_t;
1835 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1836 uif16 = UINT_FAST16_MAX;
1837 typedef uint_fast32_t my_uint_fast32_t;
1838 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1839 uif32 = UINT_FAST32_MAX;
1840 typedef uint_fast64_t my_uint_fast64_t;
1841 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1842 uif64 = UINT_FAST64_MAX;
1843 typedef uint_least8_t my_uint_least8_t;
1844 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1845 uil8 = UINT_LEAST8_MAX;
1846 typedef uint_least16_t my_uint_least16_t;
1847 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1848 uil16 = UINT_LEAST16_MAX;
1849 typedef uint_least32_t my_uint_least32_t;
1850 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1851 uil32 = UINT_LEAST32_MAX;
1852 typedef uint_least64_t my_uint_least64_t;
1853 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1854 uil64 = UINT_LEAST64_MAX;
1855 typedef uintmax_t my_uintmax_t;
1856 my_uintmax_t uim = UINTMAX_MAX;
1857 uim = UINTMAX_MAX;
1858 typedef uintptr_t my_uintptr_t;
1859 my_uintptr_t uip = UINTPTR_MAX;
1860 uip = UINTPTR_MAX;
1861 ],[glibcxx_cv_c99_stdint_tr1=yes],
1862 [glibcxx_cv_c99_stdint_tr1=no])
1863 ])
1864 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1865 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1866 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1867 [Define if C99 types in <stdint.h> should be imported in
1868 <tr1/cstdint> in namespace std::tr1.])
1869 fi
1871 # Check for the existence of <math.h> functions.
1872 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1873 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1874 AC_TRY_COMPILE([#include <math.h>],
1875 [typedef double_t my_double_t;
1876 typedef float_t my_float_t;
1877 acosh(0.0);
1878 acoshf(0.0f);
1879 acoshl(0.0l);
1880 asinh(0.0);
1881 asinhf(0.0f);
1882 asinhl(0.0l);
1883 atanh(0.0);
1884 atanhf(0.0f);
1885 atanhl(0.0l);
1886 cbrt(0.0);
1887 cbrtf(0.0f);
1888 cbrtl(0.0l);
1889 copysign(0.0, 0.0);
1890 copysignf(0.0f, 0.0f);
1891 copysignl(0.0l, 0.0l);
1892 erf(0.0);
1893 erff(0.0f);
1894 erfl(0.0l);
1895 erfc(0.0);
1896 erfcf(0.0f);
1897 erfcl(0.0l);
1898 exp2(0.0);
1899 exp2f(0.0f);
1900 exp2l(0.0l);
1901 expm1(0.0);
1902 expm1f(0.0f);
1903 expm1l(0.0l);
1904 fdim(0.0, 0.0);
1905 fdimf(0.0f, 0.0f);
1906 fdiml(0.0l, 0.0l);
1907 fma(0.0, 0.0, 0.0);
1908 fmaf(0.0f, 0.0f, 0.0f);
1909 fmal(0.0l, 0.0l, 0.0l);
1910 fmax(0.0, 0.0);
1911 fmaxf(0.0f, 0.0f);
1912 fmaxl(0.0l, 0.0l);
1913 fmin(0.0, 0.0);
1914 fminf(0.0f, 0.0f);
1915 fminl(0.0l, 0.0l);
1916 hypot(0.0, 0.0);
1917 hypotf(0.0f, 0.0f);
1918 hypotl(0.0l, 0.0l);
1919 ilogb(0.0);
1920 ilogbf(0.0f);
1921 ilogbl(0.0l);
1922 lgamma(0.0);
1923 lgammaf(0.0f);
1924 lgammal(0.0l);
1925 llrint(0.0);
1926 llrintf(0.0f);
1927 llrintl(0.0l);
1928 llround(0.0);
1929 llroundf(0.0f);
1930 llroundl(0.0l);
1931 log1p(0.0);
1932 log1pf(0.0f);
1933 log1pl(0.0l);
1934 log2(0.0);
1935 log2f(0.0f);
1936 log2l(0.0l);
1937 logb(0.0);
1938 logbf(0.0f);
1939 logbl(0.0l);
1940 lrint(0.0);
1941 lrintf(0.0f);
1942 lrintl(0.0l);
1943 lround(0.0);
1944 lroundf(0.0f);
1945 lroundl(0.0l);
1946 nan(0);
1947 nanf(0);
1948 nanl(0);
1949 nearbyint(0.0);
1950 nearbyintf(0.0f);
1951 nearbyintl(0.0l);
1952 nextafter(0.0, 0.0);
1953 nextafterf(0.0f, 0.0f);
1954 nextafterl(0.0l, 0.0l);
1955 nexttoward(0.0, 0.0);
1956 nexttowardf(0.0f, 0.0f);
1957 nexttowardl(0.0l, 0.0l);
1958 remainder(0.0, 0.0);
1959 remainderf(0.0f, 0.0f);
1960 remainderl(0.0l, 0.0l);
1961 remquo(0.0, 0.0, 0);
1962 remquof(0.0f, 0.0f, 0);
1963 remquol(0.0l, 0.0l, 0);
1964 rint(0.0);
1965 rintf(0.0f);
1966 rintl(0.0l);
1967 round(0.0);
1968 roundf(0.0f);
1969 roundl(0.0l);
1970 scalbln(0.0, 0l);
1971 scalblnf(0.0f, 0l);
1972 scalblnl(0.0l, 0l);
1973 scalbn(0.0, 0);
1974 scalbnf(0.0f, 0);
1975 scalbnl(0.0l, 0);
1976 tgamma(0.0);
1977 tgammaf(0.0f);
1978 tgammal(0.0l);
1979 trunc(0.0);
1980 truncf(0.0f);
1981 truncl(0.0l);
1982 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1983 ])
1984 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1985 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1986 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1987 [Define if C99 functions or macros in <math.h> should be imported
1988 in <tr1/cmath> in namespace std::tr1.])
1989 fi
1991 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1992 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1993 ac_c99_inttypes_tr1=no;
1994 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1995 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1996 AC_TRY_COMPILE([#include <inttypes.h>],
1997 [intmax_t i, numer, denom, base;
1998 const char* s;
1999 char** endptr;
2000 intmax_t ret = imaxabs(i);
2001 imaxdiv_t dret = imaxdiv(numer, denom);
2002 ret = strtoimax(s, endptr, base);
2003 uintmax_t uret = strtoumax(s, endptr, base);
2004 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
2005 fi
2006 AC_MSG_RESULT($ac_c99_inttypes_tr1)
2007 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
2008 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
2009 [Define if C99 functions in <inttypes.h> should be imported in
2010 <tr1/cinttypes> in namespace std::tr1.])
2011 fi
2013 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
2014 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
2015 ac_c99_inttypes_wchar_t_tr1=no;
2016 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
2017 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
2018 AC_TRY_COMPILE([#include <inttypes.h>],
2019 [intmax_t base;
2020 const wchar_t* s;
2021 wchar_t** endptr;
2022 intmax_t ret = wcstoimax(s, endptr, base);
2023 uintmax_t uret = wcstoumax(s, endptr, base);
2024 ],[ac_c99_inttypes_wchar_t_tr1=yes],
2025 [ac_c99_inttypes_wchar_t_tr1=no])
2026 fi
2027 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
2028 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
2029 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
2030 [Define if wchar_t C99 functions in <inttypes.h> should be
2031 imported in <tr1/cinttypes> in namespace std::tr1.])
2032 fi
2034 # Check for the existence of the <stdbool.h> header.
2035 AC_CHECK_HEADERS(stdbool.h)
2037 # Check for the existence of the <stdalign.h> header.
2038 AC_CHECK_HEADERS(stdalign.h)
2040 CXXFLAGS="$ac_save_CXXFLAGS"
2041 AC_LANG_RESTORE
2042 ])
2044 dnl
2045 dnl Check for uchar.h and usability.
2046 dnl
2047 AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [
2049 # Test uchar.h.
2050 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no)
2052 AC_LANG_SAVE
2053 AC_LANG_CPLUSPLUS
2054 ac_save_CXXFLAGS="$CXXFLAGS"
2055 CXXFLAGS="$CXXFLAGS -std=c++11"
2057 if test x"$ac_has_uchar_h" = x"yes"; then
2058 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>])
2059 AC_TRY_COMPILE([#include <uchar.h>
2060 #ifdef __STDC_UTF_16__
2061 long i = __STDC_UTF_16__;
2062 #endif
2063 #ifdef __STDC_UTF_32__
2064 long j = __STDC_UTF_32__;
2065 #endif
2066 namespace test
2067 {
2068 using ::c16rtomb;
2069 using ::c32rtomb;
2070 using ::mbrtoc16;
2071 using ::mbrtoc32;
2072 }
2073 ],
2074 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no])
2075 else
2076 ac_c11_uchar_cxx11=no
2077 fi
2078 AC_MSG_RESULT($ac_c11_uchar_cxx11)
2079 if test x"$ac_c11_uchar_cxx11" = x"yes"; then
2080 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1,
2081 [Define if C11 functions in <uchar.h> should be imported into
2082 namespace std in <cuchar>.])
2083 fi
2085 CXXFLAGS="$ac_save_CXXFLAGS"
2086 AC_LANG_RESTORE
2087 ])
2090 dnl
2091 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
2092 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
2093 dnl
2094 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
2096 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
2097 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
2098 if test -r /dev/random && test -r /dev/urandom; then
2099 ## For MSys environment the test above is detect as false-positive
2100 ## on mingw-targets. So disable it explicit for them.
2101 case ${target_os} in
2102 *mingw*) glibcxx_cv_random_tr1=no ;;
2103 *) glibcxx_cv_random_tr1=yes ;;
2104 esac
2105 else
2106 glibcxx_cv_random_tr1=no;
2107 fi
2108 ])
2109 AC_MSG_RESULT($glibcxx_cv_random_tr1)
2111 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
2112 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
2113 [Define if /dev/random and /dev/urandom are available for
2114 the random_device of TR1 (Chapter 5.1).])
2115 fi
2117 ])
2119 dnl
2120 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
2121 dnl
2122 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
2124 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
2125 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
2126 [#include <stdio.h>],
2127 [AC_MSG_ERROR([computing EOF failed])])
2128 ])
2129 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
2130 [Define to the value of the EOF integer constant.])
2132 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
2133 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
2134 [#include <stdio.h>],
2135 [AC_MSG_ERROR([computing SEEK_CUR failed])])
2136 ])
2137 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
2138 [Define to the value of the SEEK_CUR integer constant.])
2140 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
2141 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
2142 [#include <stdio.h>],
2143 [AC_MSG_ERROR([computing SEEK_END failed])])
2144 ])
2145 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
2146 [Define to the value of the SEEK_END integer constant.])
2147 ])
2149 dnl
2150 dnl Check whether required C++ overloads are present in <stdio.h>.
2151 dnl
2152 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
2154 AC_LANG_SAVE
2155 AC_LANG_CPLUSPLUS
2157 AC_MSG_CHECKING([for gets declaration])
2158 AC_CACHE_VAL(glibcxx_cv_gets, [
2159 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2160 [#include <stdio.h>
2161 namespace test
2162 {
2163 using ::gets;
2164 }
2165 ])],
2166 [glibcxx_cv_gets=yes],
2167 [glibcxx_cv_gets=no]
2168 )])
2170 if test $glibcxx_cv_gets = yes; then
2171 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h>.])
2172 fi
2173 AC_MSG_RESULT($glibcxx_cv_gets)
2175 AC_LANG_RESTORE
2176 ])
2178 dnl
2179 dnl Check whether required C++11 overloads are present in <math.h>.
2180 dnl
2181 AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
2183 AC_LANG_SAVE
2184 AC_LANG_CPLUSPLUS
2185 ac_save_CXXFLAGS="$CXXFLAGS"
2186 CXXFLAGS="$CXXFLAGS -std=c++11"
2188 case "$host" in
2189 *-*-solaris2.*)
2190 # Solaris 12 introduced the C++11 <math.h> overloads. A backport to
2191 # a Solaris 11.3 SRU is likely, maybe even a Solaris 10 patch.
2192 AC_MSG_CHECKING([for C++11 <math.h> overloads])
2193 AC_CACHE_VAL(glibcxx_cv_math11_overload, [
2194 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2195 [#include <math.h>
2196 #undef isfinite
2197 namespace std {
2198 inline bool isfinite(float __x)
2199 { return __builtin_isfinite(__x); }
2200 }
2201 ])],
2202 [glibcxx_cv_math11_overload=no],
2203 [glibcxx_cv_math11_overload=yes]
2204 )])
2206 # autoheader cannot handle indented templates.
2207 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO],
2208 [/* Define if all C++11 overloads are available in <math.h>. */
2209 #if __cplusplus >= 201103L
2210 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO
2211 #endif])
2213 if test $glibcxx_cv_math11_overload = yes; then
2214 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO)
2215 fi
2216 AC_MSG_RESULT([$glibcxx_cv_math11_overload])
2217 ;;
2218 *)
2219 # If <math.h> defines the obsolete isinf(double) and isnan(double)
2220 # functions (instead of or as well as the C99 generic macros) then we
2221 # can't define std::isinf(double) and std::isnan(double) in <cmath>
2222 # and must use the ones from <math.h> instead.
2223 AC_MSG_CHECKING([for obsolete isinf function in <math.h>])
2224 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf, [
2225 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2226 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2227 #include <math.h>
2228 #undef isinf
2229 namespace std {
2230 using ::isinf;
2231 bool isinf(float);
2232 bool isinf(long double);
2233 }
2234 using std::isinf;
2235 bool b = isinf(0.0);
2236 ])],
2237 [glibcxx_cv_obsolete_isinf=yes],
2238 [glibcxx_cv_obsolete_isinf=no]
2239 )])
2240 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf])
2241 if test $glibcxx_cv_obsolete_isinf = yes; then
2242 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1,
2243 [Define if <math.h> defines obsolete isinf function.])
2244 fi
2246 AC_MSG_CHECKING([for obsolete isnan function in <math.h>])
2247 AC_CACHE_VAL(glibcxx_cv_obsolete_isnan, [
2248 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2249 [#include <math.h>
2250 #undef isnan
2251 namespace std {
2252 using ::isnan;
2253 bool isnan(float);
2254 bool isnan(long double);
2255 }
2256 using std::isnan;
2257 bool b = isnan(0.0);
2258 ])],
2259 [glibcxx_cv_obsolete_isnan=yes],
2260 [glibcxx_cv_obsolete_isnan=no]
2261 )])
2262 AC_MSG_RESULT([$glibcxx_cv_obsolete_isnan])
2263 if test $glibcxx_cv_obsolete_isnan = yes; then
2264 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1,
2265 [Define if <math.h> defines obsolete isnan function.])
2266 fi
2267 ;;
2268 esac
2270 CXXFLAGS="$ac_save_CXXFLAGS"
2271 AC_LANG_RESTORE
2272 ])
2274 dnl
2275 dnl Check whether macros, etc are present for <system_error>
2276 dnl
2277 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
2279 m4_pushdef([n_syserr], [1])dnl
2280 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
2281 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
2282 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
2283 ECHILD, ENOSPC, EPERM,
2284 ETIMEDOUT, EWOULDBLOCK],
2285 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
2286 AC_MSG_CHECKING([for syserr])
2287 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
2288 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
2289 [int i = syserr;])],
2290 [glibcxx_cv_system_error[]n_syserr=yes],
2291 [glibcxx_cv_system_error[]n_syserr=no])
2292 ])
2293 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
2294 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
2295 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
2296 fi
2297 m4_define([n_syserr], m4_incr(n_syserr))dnl
2298 m4_popdef([SYSERR])dnl
2299 ])
2300 m4_popdef([n_syserr])dnl
2301 ])
2303 dnl
2304 dnl Check for what type of C headers to use.
2305 dnl
2306 dnl --enable-cheaders= [does stuff].
2307 dnl --disable-cheaders [does not do anything, really].
2308 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
2309 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
2310 dnl
2311 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
2312 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
2313 [construct "C" headers for g++], [permit c|c_std|c_global])
2314 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2316 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2318 # Allow overrides to configure.host here.
2319 if test $enable_cheaders = c_global; then
2320 c_compatibility=yes
2321 fi
2323 AC_SUBST(C_INCLUDE_DIR)
2324 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2325 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
2326 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
2327 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
2328 ])
2331 dnl
2332 dnl Check for which locale library to use. The choice is mapped to
2333 dnl a subdirectory of config/locale.
2334 dnl
2335 dnl Default is generic.
2336 dnl
2337 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
2338 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
2339 [use MODEL for target locale package],
2340 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
2342 # Deal with gettext issues. Default to not using it (=no) until we detect
2343 # support for it later. Let the user turn it off via --e/d, but let that
2344 # default to on for easier handling.
2345 USE_NLS=no
2346 AC_ARG_ENABLE(nls,
2347 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2348 [],
2349 [enable_nls=yes])
2351 # Either a known package, or "auto"
2352 if test $enable_clocale = no || test $enable_clocale = yes; then
2353 enable_clocale=auto
2354 fi
2355 enable_clocale_flag=$enable_clocale
2357 # Probe for locale model to use if none specified.
2358 # Default to "generic".
2359 if test $enable_clocale_flag = auto; then
2360 case ${target_os} in
2361 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2362 enable_clocale_flag=gnu
2363 ;;
2364 darwin*)
2365 enable_clocale_flag=darwin
2366 ;;
2367 dragonfly* | freebsd*)
2368 enable_clocale_flag=dragonfly
2369 ;;
2370 openbsd*)
2371 enable_clocale_flag=newlib
2372 ;;
2373 *)
2374 if test x"$with_newlib" = x"yes"; then
2375 enable_clocale_flag=newlib
2376 else
2377 enable_clocale_flag=generic
2378 fi
2379 ;;
2380 esac
2381 fi
2383 # Sanity check model, and test for special functionality.
2384 if test $enable_clocale_flag = gnu; then
2385 AC_EGREP_CPP([_GLIBCXX_ok], [
2386 #include <features.h>
2387 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
2388 _GLIBCXX_ok
2389 #endif
2390 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2392 # Set it to scream when it hurts.
2393 ac_save_CFLAGS="$CFLAGS"
2394 CFLAGS="-Wimplicit-function-declaration -Werror"
2396 # Use strxfrm_l if available.
2397 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2398 #include <string.h>
2399 #include <locale.h>],
2400 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2401 AC_DEFINE(HAVE_STRXFRM_L, 1,
2402 [Define if strxfrm_l is available in <string.h>.]),)
2404 # Use strerror_l if available.
2405 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2406 #include <string.h>
2407 #include <locale.h>],
2408 [__locale_t loc; strerror_l(5, loc);],
2409 AC_DEFINE(HAVE_STRERROR_L, 1,
2410 [Define if strerror_l is available in <string.h>.]),)
2412 CFLAGS="$ac_save_CFLAGS"
2413 fi
2415 # Perhaps use strerror_r if available, and strerror_l isn't.
2416 ac_save_CFLAGS="$CFLAGS"
2417 CFLAGS="-Wimplicit-function-declaration -Werror"
2418 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2419 #include <string.h>
2420 #include <locale.h>],
2421 [char s[128]; strerror_r(5, s, 128);],
2422 AC_DEFINE(HAVE_STRERROR_R, 1,
2423 [Define if strerror_r is available in <string.h>.]),)
2424 CFLAGS="$ac_save_CFLAGS"
2426 # Set configure bits for specified locale package
2427 AC_MSG_CHECKING([for C locale to use])
2428 case ${enable_clocale_flag} in
2429 generic)
2430 AC_MSG_RESULT(generic)
2432 CLOCALE_H=config/locale/generic/c_locale.h
2433 CLOCALE_CC=config/locale/generic/c_locale.cc
2434 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2435 CCOLLATE_CC=config/locale/generic/collate_members.cc
2436 CCTYPE_CC=config/locale/generic/ctype_members.cc
2437 CMESSAGES_H=config/locale/generic/messages_members.h
2438 CMESSAGES_CC=config/locale/generic/messages_members.cc
2439 CMONEY_CC=config/locale/generic/monetary_members.cc
2440 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2441 CTIME_H=config/locale/generic/time_members.h
2442 CTIME_CC=config/locale/generic/time_members.cc
2443 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2444 ;;
2445 darwin)
2446 AC_MSG_RESULT(darwin)
2448 CLOCALE_H=config/locale/generic/c_locale.h
2449 CLOCALE_CC=config/locale/generic/c_locale.cc
2450 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2451 CCOLLATE_CC=config/locale/generic/collate_members.cc
2452 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2453 CMESSAGES_H=config/locale/generic/messages_members.h
2454 CMESSAGES_CC=config/locale/generic/messages_members.cc
2455 CMONEY_CC=config/locale/generic/monetary_members.cc
2456 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2457 CTIME_H=config/locale/generic/time_members.h
2458 CTIME_CC=config/locale/generic/time_members.cc
2459 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2460 ;;
2462 dragonfly)
2463 AC_MSG_RESULT(dragonfly or freebsd)
2465 CLOCALE_H=config/locale/dragonfly/c_locale.h
2466 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
2467 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2468 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
2469 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2470 CMESSAGES_H=config/locale/generic/messages_members.h
2471 CMESSAGES_CC=config/locale/generic/messages_members.cc
2472 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2473 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2474 CTIME_H=config/locale/dragonfly/time_members.h
2475 CTIME_CC=config/locale/dragonfly/time_members.cc
2476 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2477 ;;
2479 gnu)
2480 AC_MSG_RESULT(gnu)
2482 # Declare intention to use gettext, and add support for specific
2483 # languages.
2484 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2485 ALL_LINGUAS="de fr"
2487 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2488 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2489 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2490 USE_NLS=yes
2491 fi
2492 # Export the build objects.
2493 for ling in $ALL_LINGUAS; do \
2494 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2495 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2496 done
2497 AC_SUBST(glibcxx_MOFILES)
2498 AC_SUBST(glibcxx_POFILES)
2500 CLOCALE_H=config/locale/gnu/c_locale.h
2501 CLOCALE_CC=config/locale/gnu/c_locale.cc
2502 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2503 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2504 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2505 CMESSAGES_H=config/locale/gnu/messages_members.h
2506 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2507 CMONEY_CC=config/locale/gnu/monetary_members.cc
2508 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2509 CTIME_H=config/locale/gnu/time_members.h
2510 CTIME_CC=config/locale/gnu/time_members.cc
2511 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2512 ;;
2513 ieee_1003.1-2001)
2514 AC_MSG_RESULT(IEEE 1003.1)
2516 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2517 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2518 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2519 CCOLLATE_CC=config/locale/generic/collate_members.cc
2520 CCTYPE_CC=config/locale/generic/ctype_members.cc
2521 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2522 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2523 CMONEY_CC=config/locale/generic/monetary_members.cc
2524 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2525 CTIME_H=config/locale/generic/time_members.h
2526 CTIME_CC=config/locale/generic/time_members.cc
2527 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2528 ;;
2529 newlib)
2530 AC_MSG_RESULT(newlib)
2532 CLOCALE_H=config/locale/generic/c_locale.h
2533 CLOCALE_CC=config/locale/generic/c_locale.cc
2534 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2535 CCOLLATE_CC=config/locale/generic/collate_members.cc
2536 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2537 CMESSAGES_H=config/locale/generic/messages_members.h
2538 CMESSAGES_CC=config/locale/generic/messages_members.cc
2539 CMONEY_CC=config/locale/generic/monetary_members.cc
2540 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2541 CTIME_H=config/locale/generic/time_members.h
2542 CTIME_CC=config/locale/generic/time_members.cc
2543 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2544 ;;
2545 esac
2547 # This is where the testsuite looks for locale catalogs, using the
2548 # -DLOCALEDIR define during testsuite compilation.
2549 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2550 AC_SUBST(glibcxx_localedir)
2552 # A standalone libintl (e.g., GNU libintl) may be in use.
2553 if test $USE_NLS = yes; then
2554 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2555 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2556 fi
2557 if test $USE_NLS = yes; then
2558 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2559 [Define if NLS translations are to be used.])
2560 fi
2562 AC_SUBST(USE_NLS)
2563 AC_SUBST(CLOCALE_H)
2564 AC_SUBST(CMESSAGES_H)
2565 AC_SUBST(CCODECVT_CC)
2566 AC_SUBST(CCOLLATE_CC)
2567 AC_SUBST(CCTYPE_CC)
2568 AC_SUBST(CMESSAGES_CC)
2569 AC_SUBST(CMONEY_CC)
2570 AC_SUBST(CNUMERIC_CC)
2571 AC_SUBST(CTIME_H)
2572 AC_SUBST(CTIME_CC)
2573 AC_SUBST(CLOCALE_CC)
2574 AC_SUBST(CLOCALE_INTERNAL_H)
2575 ])
2578 dnl
2579 dnl Check for which std::allocator base class to use. The choice is
2580 dnl mapped from a subdirectory of include/ext.
2581 dnl
2582 dnl Default is new.
2583 dnl
2584 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2585 AC_MSG_CHECKING([for std::allocator base class])
2586 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2587 [use KIND for target std::allocator base],
2588 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2590 # If they didn't use this option switch, or if they specified --enable
2591 # with no specific model, we'll have to look for one. If they
2592 # specified --disable (???), do likewise.
2593 if test $enable_libstdcxx_allocator = no ||
2594 test $enable_libstdcxx_allocator = yes;
2595 then
2596 enable_libstdcxx_allocator=auto
2597 fi
2599 # Either a known package, or "auto". Auto implies the default choice
2600 # for a particular platform.
2601 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2603 # Probe for host-specific support if no specific model is specified.
2604 # Default to "new".
2605 if test $enable_libstdcxx_allocator_flag = auto; then
2606 case ${target_os} in
2607 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2608 enable_libstdcxx_allocator_flag=new
2609 ;;
2610 *)
2611 enable_libstdcxx_allocator_flag=new
2612 ;;
2613 esac
2614 fi
2615 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2618 # Set configure bits for specified locale package
2619 case ${enable_libstdcxx_allocator_flag} in
2620 bitmap)
2621 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2622 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2623 ;;
2624 malloc)
2625 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2626 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2627 ;;
2628 mt)
2629 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2630 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2631 ;;
2632 new)
2633 ALLOCATOR_H=config/allocator/new_allocator_base.h
2634 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2635 ;;
2636 pool)
2637 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2638 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2639 ;;
2640 esac
2642 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW,
2643 test $enable_libstdcxx_allocator_flag = new)
2644 AC_SUBST(ALLOCATOR_H)
2645 AC_SUBST(ALLOCATOR_NAME)
2646 ])
2649 dnl
2650 dnl Check for whether the Boost-derived checks should be turned on.
2651 dnl
2652 dnl --enable-concept-checks turns them on.
2653 dnl --disable-concept-checks leaves them off.
2654 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2655 dnl Where DEFAULT is either `yes' or `no'.
2656 dnl
2657 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2658 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2659 if test $enable_concept_checks = yes; then
2660 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2661 [Define to use concept checking code from the boost libraries.])
2662 fi
2663 ])
2665 dnl
2666 dnl Use extern templates.
2667 dnl
2668 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2669 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2671 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2672 dnl Where DEFAULT is `yes' or `no'.
2673 dnl
2674 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2676 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2678 AC_MSG_CHECKING([for extern template support])
2679 AC_MSG_RESULT([$enable_extern_template])
2681 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2682 ])
2684 dnl
2685 dnl Use vtable verification.
2686 dnl
2687 dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2688 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2690 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2691 dnl Where DEFAULT is `yes' or `no'.
2692 dnl
2693 AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2695 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2697 AC_MSG_CHECKING([for vtable verify support])
2698 AC_MSG_RESULT([$enable_vtable_verify])
2700 vtv_cygmin=no
2701 if test $enable_vtable_verify = yes; then
2702 case ${target_os} in
2703 cygwin*|mingw32*)
2704 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2705 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2706 vtv_cygmin=yes
2707 ;;
2708 darwin*)
2709 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2710 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2711 ;;
2712 solaris2*)
2713 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2714 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2715 ;;
2716 *)
2717 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2718 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2719 ;;
2720 esac
2721 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2722 else
2723 VTV_CXXFLAGS=
2724 VTV_PCH_CXXFLAGS=
2725 VTV_CXXLINKFLAGS=
2726 fi
2728 AC_SUBST(VTV_CXXFLAGS)
2729 AC_SUBST(VTV_PCH_CXXFLAGS)
2730 AC_SUBST(VTV_CXXLINKFLAGS)
2731 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2732 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2733 ])
2735 dnl
2736 dnl Check for parallel mode pre-requisites, including OpenMP support.
2737 dnl
2738 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2739 dnl
2740 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2742 enable_parallel=no;
2744 # See if configured libgomp/omp.h exists. (libgomp may be in
2745 # noconfigdirs but not explicitly disabled.)
2746 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2747 enable_parallel=yes;
2748 else
2749 AC_MSG_NOTICE([target-libgomp not built])
2750 fi
2752 AC_MSG_CHECKING([for parallel mode support])
2753 AC_MSG_RESULT([$enable_parallel])
2754 ])
2757 dnl
2758 dnl Check for which I/O library to use: stdio, or something specific.
2759 dnl
2760 dnl Default is stdio.
2761 dnl
2762 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2763 AC_MSG_CHECKING([for underlying I/O to use])
2764 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2765 [use target-specific I/O package], [permit stdio])
2767 # Now that libio has been removed, you can have any color you want as long
2768 # as it's black. This is one big no-op until other packages are added, but
2769 # showing the framework never hurts.
2770 case ${enable_cstdio} in
2771 stdio)
2772 CSTDIO_H=config/io/c_io_stdio.h
2773 BASIC_FILE_H=config/io/basic_file_stdio.h
2774 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2775 AC_MSG_RESULT(stdio)
2776 ;;
2777 esac
2779 AC_SUBST(CSTDIO_H)
2780 AC_SUBST(BASIC_FILE_H)
2781 AC_SUBST(BASIC_FILE_CC)
2782 ])
2785 dnl
2786 dnl Check for "unusual" flags to pass to the compiler while building.
2787 dnl
2788 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2789 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2790 dnl --disable-cxx-flags passes nothing.
2791 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2792 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2793 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2794 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2795 dnl If "default flags" is an empty string, the effect is the same
2796 dnl as --disable or --enable=no.
2797 dnl
2798 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2799 AC_MSG_CHECKING([for extra compiler flags for building])
2800 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2801 [pass compiler FLAGS when building library],
2802 [case "x$enable_cxx_flags" in
2803 xno | x) enable_cxx_flags= ;;
2804 x-*) ;;
2805 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2806 esac])
2808 # Run through flags (either default or command-line) and set anything
2809 # extra (e.g., #defines) that must accompany particular g++ options.
2810 if test -n "$enable_cxx_flags"; then
2811 for f in $enable_cxx_flags; do
2812 case "$f" in
2813 -fhonor-std) ;;
2814 -*) ;;
2815 *) # and we're trying to pass /what/ exactly?
2816 AC_MSG_ERROR([compiler flags start with a -]) ;;
2817 esac
2818 done
2819 fi
2821 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2822 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2823 AC_SUBST(EXTRA_CXX_FLAGS)
2824 ])
2827 dnl
2828 dnl Check to see if debugging libraries are to be built.
2829 dnl
2830 dnl --enable-libstdcxx-debug
2831 dnl builds a separate set of debugging libraries in addition to the
2832 dnl normal (shared, static) libstdc++ binaries.
2833 dnl
2834 dnl --disable-libstdcxx-debug
2835 dnl builds only one (non-debug) version of libstdc++.
2836 dnl
2837 dnl --enable-libstdcxx-debug-flags=FLAGS
2838 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2839 dnl
2840 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2841 dnl Where DEFAULT is either `yes' or `no'.
2842 dnl
2843 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2844 AC_MSG_CHECKING([for additional debug build])
2845 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2846 AC_MSG_RESULT($enable_libstdcxx_debug)
2847 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2848 ])
2851 dnl
2852 dnl Check for explicit debug flags.
2853 dnl
2854 dnl --enable-libstdcxx-debug-flags='-O1'
2855 dnl is a general method for passing flags to be used when
2856 dnl building debug libraries with --enable-libstdcxx-debug.
2857 dnl
2858 dnl --disable-libstdcxx-debug-flags does nothing.
2859 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2860 dnl If "default flags" is an empty string, the effect is the same
2861 dnl as --disable or --enable=no.
2862 dnl
2863 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2864 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2865 [pass compiler FLAGS when building debug library],
2866 [case "x$enable_libstdcxx_debug_flags" in
2867 xno | x) enable_libstdcxx_debug_flags= ;;
2868 x-*) ;;
2869 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2870 esac])
2872 # Option parsed, now set things appropriately
2873 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2874 AC_SUBST(DEBUG_FLAGS)
2876 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2877 ])
2880 dnl
2881 dnl Check if the user only wants a freestanding library implementation.
2882 dnl
2883 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2884 dnl installing only the headers required by [17.4.1.3] and the language
2885 dnl support library. More than that will be built (to keep the Makefiles
2886 dnl conveniently clean), but not installed.
2887 dnl
2888 dnl Sets:
2889 dnl is_hosted (yes/no)
2890 dnl
2891 dnl Defines:
2892 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2893 dnl
2894 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2895 AC_ARG_ENABLE([hosted-libstdcxx],
2896 AC_HELP_STRING([--disable-hosted-libstdcxx],
2897 [only build freestanding C++ runtime support]),,
2898 [case "$host" in
2899 arm*-*-symbianelf*)
2900 enable_hosted_libstdcxx=no
2901 ;;
2902 *)
2903 enable_hosted_libstdcxx=yes
2904 ;;
2905 esac])
2906 if test "$enable_hosted_libstdcxx" = no; then
2907 AC_MSG_NOTICE([Only freestanding libraries will be built])
2908 is_hosted=no
2909 hosted_define=0
2910 enable_abi_check=no
2911 enable_libstdcxx_pch=no
2912 else
2913 is_hosted=yes
2914 hosted_define=1
2915 fi
2916 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2917 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2918 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2919 ])
2922 dnl
2923 dnl Check if the user wants a non-verbose library implementation.
2924 dnl
2925 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2926 dnl standard error on termination.
2927 dnl
2928 dnl Defines:
2929 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2930 dnl
2931 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2932 AC_ARG_ENABLE([libstdcxx-verbose],
2933 AC_HELP_STRING([--disable-libstdcxx-verbose],
2934 [disable termination messages to standard error]),,
2935 [enable_libstdcxx_verbose=yes])
2936 if test x"$enable_libstdcxx_verbose" = xyes; then
2937 verbose_define=1
2938 else
2939 AC_MSG_NOTICE([verbose termination messages are disabled])
2940 verbose_define=0
2941 fi
2942 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
2943 [Define to 1 if a verbose library is built, or 0 otherwise.])
2944 ])
2947 dnl
2948 dnl Check for template specializations for the 'long long' type.
2949 dnl The result determines only whether 'long long' I/O is enabled; things
2950 dnl like numeric_limits<> specializations are always available.
2951 dnl
2952 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2953 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2954 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2955 dnl Where DEFAULT is either `yes' or `no'.
2956 dnl
2957 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2958 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2959 if test $enable_long_long = yes; then
2960 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2961 [Define if code specialized for long long should be used.])
2962 fi
2963 AC_MSG_CHECKING([for enabled long long specializations])
2964 AC_MSG_RESULT([$enable_long_long])
2965 ])
2968 dnl
2969 dnl Check for decimal floating point.
2970 dnl See:
2971 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2972 dnl
2973 dnl This checks to see if the host supports decimal floating point types.
2974 dnl
2975 dnl Defines:
2976 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2977 dnl
2978 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2980 # Fake what AC_TRY_COMPILE does, without linking as this is
2981 # unnecessary for this test.
2983 cat > conftest.$ac_ext << EOF
2984 [#]line __oline__ "configure"
2985 int main()
2986 {
2987 _Decimal32 d1;
2988 _Decimal64 d2;
2989 _Decimal128 d3;
2990 return 0;
2991 }
2992 EOF
2994 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2995 if AC_TRY_EVAL(ac_compile); then
2996 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2997 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2998 enable_dfp=yes
2999 else
3000 enable_dfp=no
3001 fi
3002 AC_MSG_RESULT($enable_dfp)
3003 rm -f conftest*
3004 ])
3006 dnl
3007 dnl Check for GNU 128-bit integer and floating point types.
3008 dnl
3009 dnl Note: also checks that the types aren't standard types.
3010 dnl
3011 dnl Defines:
3012 dnl _GLIBCXX_USE_INT128
3013 dnl _GLIBCXX_USE_FLOAT128
3014 dnl
3015 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
3017 AC_LANG_SAVE
3018 AC_LANG_CPLUSPLUS
3020 # Fake what AC_TRY_COMPILE does, without linking as this is
3021 # unnecessary for this test.
3023 cat > conftest.$ac_ext << EOF
3024 [#]line __oline__ "configure"
3025 template<typename T1, typename T2>
3026 struct same
3027 { typedef T2 type; };
3029 template<typename T>
3030 struct same<T, T>;
3032 int main()
3033 {
3034 typename same<long, __int128>::type i1;
3035 typename same<long long, __int128>::type i2;
3036 }
3037 EOF
3039 AC_MSG_CHECKING([for __int128])
3040 if AC_TRY_EVAL(ac_compile); then
3041 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
3042 [Define if __int128 is supported on this host.])
3043 enable_int128=yes
3044 else
3045 enable_int128=no
3046 fi
3047 AC_MSG_RESULT($enable_int128)
3048 rm -f conftest*
3050 cat > conftest.$ac_ext << EOF
3051 [#]line __oline__ "configure"
3052 template<typename T1, typename T2>
3053 struct same
3054 { typedef T2 type; };
3056 template<typename T>
3057 struct same<T, T>;
3059 int main()
3060 {
3061 typename same<double, __float128>::type f1;
3062 typename same<long double, __float128>::type f2;
3063 }
3064 EOF
3066 AC_MSG_CHECKING([for __float128])
3067 if AC_TRY_EVAL(ac_compile); then
3068 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
3069 [Define if __float128 is supported on this host.])
3070 enable_float128=yes
3071 else
3072 enable_float128=no
3073 fi
3074 AC_MSG_RESULT($enable_float128)
3075 rm -f conftest*
3077 AC_LANG_RESTORE
3078 ])
3080 dnl
3081 dnl Check for template specializations for the 'wchar_t' type.
3082 dnl
3083 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3084 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3085 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3086 dnl Where DEFAULT is either `yes' or `no'.
3087 dnl
3088 dnl Necessary support must also be present.
3089 dnl
3090 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3091 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
3093 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3094 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3095 AC_MSG_CHECKING([for mbstate_t])
3096 AC_TRY_COMPILE([#include <wchar.h>],
3097 [mbstate_t teststate;],
3098 have_mbstate_t=yes, have_mbstate_t=no)
3099 AC_MSG_RESULT($have_mbstate_t)
3100 if test x"$have_mbstate_t" = xyes; then
3101 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3102 fi
3104 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3105 # ac_has_wchar_h.
3106 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
3108 if test x"$enable_wchar_t" = x"yes"; then
3110 AC_LANG_SAVE
3111 AC_LANG_CPLUSPLUS
3113 if test x"$ac_has_wchar_h" = xyes &&
3114 test x"$ac_has_wctype_h" = xyes; then
3115 AC_TRY_COMPILE([#include <wchar.h>
3116 #include <stddef.h>
3117 wint_t i;
3118 long l = WEOF;
3119 long j = WCHAR_MIN;
3120 long k = WCHAR_MAX;
3121 namespace test
3122 {
3123 using ::btowc;
3124 using ::fgetwc;
3125 using ::fgetws;
3126 using ::fputwc;
3127 using ::fputws;
3128 using ::fwide;
3129 using ::fwprintf;
3130 using ::fwscanf;
3131 using ::getwc;
3132 using ::getwchar;
3133 using ::mbrlen;
3134 using ::mbrtowc;
3135 using ::mbsinit;
3136 using ::mbsrtowcs;
3137 using ::putwc;
3138 using ::putwchar;
3139 using ::swprintf;
3140 using ::swscanf;
3141 using ::ungetwc;
3142 using ::vfwprintf;
3143 using ::vswprintf;
3144 using ::vwprintf;
3145 using ::wcrtomb;
3146 using ::wcscat;
3147 using ::wcschr;
3148 using ::wcscmp;
3149 using ::wcscoll;
3150 using ::wcscpy;
3151 using ::wcscspn;
3152 using ::wcsftime;
3153 using ::wcslen;
3154 using ::wcsncat;
3155 using ::wcsncmp;
3156 using ::wcsncpy;
3157 using ::wcspbrk;
3158 using ::wcsrchr;
3159 using ::wcsrtombs;
3160 using ::wcsspn;
3161 using ::wcsstr;
3162 using ::wcstod;
3163 using ::wcstok;
3164 using ::wcstol;
3165 using ::wcstoul;
3166 using ::wcsxfrm;
3167 using ::wctob;
3168 using ::wmemchr;
3169 using ::wmemcmp;
3170 using ::wmemcpy;
3171 using ::wmemmove;
3172 using ::wmemset;
3173 using ::wprintf;
3174 using ::wscanf;
3175 }
3176 ],[],[], [enable_wchar_t=no])
3177 else
3178 enable_wchar_t=no
3179 fi
3181 AC_LANG_RESTORE
3182 fi
3184 if test x"$enable_wchar_t" = x"yes"; then
3185 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
3186 [Define if code specialized for wchar_t should be used.])
3187 fi
3189 AC_MSG_CHECKING([for enabled wchar_t specializations])
3190 AC_MSG_RESULT([$enable_wchar_t])
3191 ])
3194 dnl
3195 dnl Check to see if building and using a C++ precompiled header can be done.
3196 dnl
3197 dnl --enable-libstdcxx-pch=yes
3198 dnl default, this shows intent to use stdc++.h.gch If it looks like it
3199 dnl may work, after some light-hearted attempts to puzzle out compiler
3200 dnl support, flip bits on in include/Makefile.am
3201 dnl
3202 dnl --disable-libstdcxx-pch
3203 dnl turns off attempts to use or build stdc++.h.gch.
3204 dnl
3205 dnl Substs:
3206 dnl glibcxx_PCHFLAGS
3207 dnl
3208 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
3209 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
3210 if test $enable_libstdcxx_pch = yes; then
3211 AC_CACHE_CHECK([for compiler with PCH support],
3212 [glibcxx_cv_prog_CXX_pch],
3213 [ac_save_CXXFLAGS="$CXXFLAGS"
3214 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3215 AC_LANG_SAVE
3216 AC_LANG_CPLUSPLUS
3217 echo '#include <math.h>' > conftest.h
3218 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
3219 -o conftest.h.gch 1>&5 2>&1 &&
3220 echo '#error "pch failed"' > conftest.h &&
3221 echo '#include "conftest.h"' > conftest.cc &&
3222 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3223 then
3224 glibcxx_cv_prog_CXX_pch=yes
3225 else
3226 glibcxx_cv_prog_CXX_pch=no
3227 fi
3228 rm -f conftest*
3229 CXXFLAGS=$ac_save_CXXFLAGS
3230 AC_LANG_RESTORE
3231 ])
3232 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
3233 fi
3235 AC_MSG_CHECKING([for enabled PCH])
3236 AC_MSG_RESULT([$enable_libstdcxx_pch])
3238 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
3239 if test $enable_libstdcxx_pch = yes; then
3240 glibcxx_PCHFLAGS="-include bits/stdc++.h"
3241 else
3242 glibcxx_PCHFLAGS=""
3243 fi
3244 AC_SUBST(glibcxx_PCHFLAGS)
3245 ])
3248 dnl
3249 dnl Check for atomic builtins.
3250 dnl See:
3251 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
3252 dnl
3253 dnl This checks to see if the host supports the compiler-generated
3254 dnl builtins for atomic operations for various integral sizes. Note, this
3255 dnl is intended to be an all-or-nothing switch, so all the atomic operations
3256 dnl that are used should be checked.
3257 dnl
3258 dnl Note:
3259 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
3260 dnl
3261 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
3262 AC_LANG_SAVE
3263 AC_LANG_CPLUSPLUS
3264 old_CXXFLAGS="$CXXFLAGS"
3266 # Do link tests if possible, instead asm tests, limited to some platforms
3267 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3268 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3269 atomic_builtins_link_tests=no
3270 if test x$gcc_no_link != xyes; then
3271 # Can do link tests. Limit to some tested platforms
3272 case "$host" in
3273 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3274 atomic_builtins_link_tests=yes
3275 ;;
3276 esac
3277 fi
3279 if test x$atomic_builtins_link_tests = xyes; then
3281 # Do link tests.
3283 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3285 AC_MSG_CHECKING([for atomic builtins for bool])
3286 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
3287 AC_TRY_LINK(
3288 [ ],
3289 [typedef bool atomic_type;
3290 atomic_type c1;
3291 atomic_type c2;
3292 atomic_type c3(0);
3293 // N.B. __atomic_fetch_add is not supported for bool.
3294 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3295 __ATOMIC_RELAXED);
3296 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3297 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3298 ],
3299 [glibcxx_cv_atomic_bool=yes],
3300 [glibcxx_cv_atomic_bool=no])
3301 ])
3302 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3304 AC_MSG_CHECKING([for atomic builtins for short])
3305 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
3306 AC_TRY_LINK(
3307 [ ],
3308 [typedef short atomic_type;
3309 atomic_type c1;
3310 atomic_type c2;
3311 atomic_type c3(0);
3312 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3313 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3314 __ATOMIC_RELAXED);
3315 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3316 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3317 ],
3318 [glibcxx_cv_atomic_short=yes],
3319 [glibcxx_cv_atomic_short=no])
3320 ])
3321 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3323 AC_MSG_CHECKING([for atomic builtins for int])
3324 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
3325 AC_TRY_LINK(
3326 [ ],
3327 [typedef int 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);
3336 ],
3337 [glibcxx_cv_atomic_int=yes],
3338 [glibcxx_cv_atomic_int=no])
3339 ])
3340 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3342 AC_MSG_CHECKING([for atomic builtins for long long])
3343 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
3344 AC_TRY_LINK(
3345 [ ],
3346 [typedef long long atomic_type;
3347 atomic_type c1;
3348 atomic_type c2;
3349 atomic_type c3(0);
3350 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3351 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3352 __ATOMIC_RELAXED);
3353 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3354 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3355 ],
3356 [glibcxx_cv_atomic_long_long=yes],
3357 [glibcxx_cv_atomic_long_long=no])
3358 ])
3359 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3361 else
3363 # Do asm tests.
3365 # Compile unoptimized.
3366 CXXFLAGS='-O0 -S'
3368 # Fake what AC_TRY_COMPILE does.
3370 cat > conftest.$ac_ext << EOF
3371 [#]line __oline__ "configure"
3372 int main()
3373 {
3374 typedef bool atomic_type;
3375 atomic_type c1;
3376 atomic_type c2;
3377 atomic_type c3(0);
3378 // N.B. __atomic_fetch_add is not supported for bool.
3379 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3380 __ATOMIC_RELAXED);
3381 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3382 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3384 return 0;
3385 }
3386 EOF
3388 AC_MSG_CHECKING([for atomic builtins for bool])
3389 if AC_TRY_EVAL(ac_compile); then
3390 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3391 glibcxx_cv_atomic_bool=no
3392 else
3393 glibcxx_cv_atomic_bool=yes
3394 fi
3395 fi
3396 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3397 rm -f conftest*
3399 cat > conftest.$ac_ext << EOF
3400 [#]line __oline__ "configure"
3401 int main()
3402 {
3403 typedef short atomic_type;
3404 atomic_type c1;
3405 atomic_type c2;
3406 atomic_type c3(0);
3407 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3408 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3409 __ATOMIC_RELAXED);
3410 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3411 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3413 return 0;
3414 }
3415 EOF
3417 AC_MSG_CHECKING([for atomic builtins for short])
3418 if AC_TRY_EVAL(ac_compile); then
3419 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3420 glibcxx_cv_atomic_short=no
3421 else
3422 glibcxx_cv_atomic_short=yes
3423 fi
3424 fi
3425 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3426 rm -f conftest*
3428 cat > conftest.$ac_ext << EOF
3429 [#]line __oline__ "configure"
3430 int main()
3431 {
3432 // NB: _Atomic_word not necessarily int.
3433 typedef int atomic_type;
3434 atomic_type c1;
3435 atomic_type c2;
3436 atomic_type c3(0);
3437 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3438 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3439 __ATOMIC_RELAXED);
3440 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3441 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3443 return 0;
3444 }
3445 EOF
3447 AC_MSG_CHECKING([for atomic builtins for int])
3448 if AC_TRY_EVAL(ac_compile); then
3449 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3450 glibcxx_cv_atomic_int=no
3451 else
3452 glibcxx_cv_atomic_int=yes
3453 fi
3454 fi
3455 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3456 rm -f conftest*
3458 cat > conftest.$ac_ext << EOF
3459 [#]line __oline__ "configure"
3460 int main()
3461 {
3462 typedef long long atomic_type;
3463 atomic_type c1;
3464 atomic_type c2;
3465 atomic_type c3(0);
3466 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3467 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3468 __ATOMIC_RELAXED);
3469 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3470 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3472 return 0;
3473 }
3474 EOF
3476 AC_MSG_CHECKING([for atomic builtins for long long])
3477 if AC_TRY_EVAL(ac_compile); then
3478 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3479 glibcxx_cv_atomic_long_long=no
3480 else
3481 glibcxx_cv_atomic_long_long=yes
3482 fi
3483 fi
3484 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3485 rm -f conftest*
3487 fi
3489 CXXFLAGS="$old_CXXFLAGS"
3490 AC_LANG_RESTORE
3492 # Set atomicity_dir to builtins if all but the long long test above passes.
3493 if test "$glibcxx_cv_atomic_bool" = yes \
3494 && test "$glibcxx_cv_atomic_short" = yes \
3495 && test "$glibcxx_cv_atomic_int" = yes; then
3496 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3497 [Define if the compiler supports C++11 atomics.])
3498 atomicity_dir=cpu/generic/atomicity_builtins
3499 fi
3501 # If still generic, set to mutex.
3502 if test $atomicity_dir = "cpu/generic" ; then
3503 atomicity_dir=cpu/generic/atomicity_mutex
3504 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3505 if test "x$target_thread_file" = xsingle; then
3506 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3507 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3508 else
3509 AC_MSG_WARN([They will be faked using a mutex.])
3510 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3511 fi
3512 fi
3514 ])
3517 dnl
3518 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3519 dnl
3520 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3521 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3522 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3523 dnl Where DEFAULT is 'yes'.
3524 dnl
3525 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3526 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3528 if test x$enable_libstdcxx_visibility = xyes ; then
3529 dnl all hail libgfortran
3530 dnl Check whether the target supports hidden visibility.
3531 AC_CACHE_CHECK([whether the target supports hidden visibility],
3532 glibcxx_cv_have_attribute_visibility, [
3533 save_CFLAGS="$CFLAGS"
3534 CFLAGS="$CFLAGS -Werror"
3535 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3536 [], glibcxx_cv_have_attribute_visibility=yes,
3537 glibcxx_cv_have_attribute_visibility=no)
3538 CFLAGS="$save_CFLAGS"])
3539 if test $glibcxx_cv_have_attribute_visibility = no; then
3540 enable_libstdcxx_visibility=no
3541 fi
3542 fi
3544 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3545 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3546 ])
3549 dnl
3550 dnl Add version tags to symbols in shared library (or not), additionally
3551 dnl marking other symbols as private/local (or not).
3552 dnl
3553 dnl Sets libtool_VERSION, and determines shared library SONAME.
3554 dnl
3555 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3556 dnl
3557 dnl --enable-symvers=style adds a version script to the linker call when
3558 dnl creating the shared library. The choice of version script is
3559 dnl controlled by 'style'.
3560 dnl --disable-symvers does not.
3561 dnl
3562 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3563 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3564 dnl choose a default style based on linker characteristics. Passing
3565 dnl 'no' disables versioning.
3566 dnl
3567 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3569 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3570 [enables symbol versioning of the shared library],
3571 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3573 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3574 # don't know enough about $LD to do tricks...
3575 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3576 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3577 # with extern "C++" in version scripts.
3578 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3580 # Turn a 'yes' into a suitable default.
3581 if test x$enable_symvers = xyes ; then
3582 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3583 enable_symvers=no
3584 else
3585 if test $with_gnu_ld = yes ; then
3586 case ${target_os} in
3587 hpux*)
3588 enable_symvers=no ;;
3589 *)
3590 enable_symvers=gnu ;;
3591 esac
3592 else
3593 case ${target_os} in
3594 darwin*)
3595 enable_symvers=darwin ;;
3596 # Sun symbol versioning exists since Solaris 2.5.
3597 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3598 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3599 # version scripts, so disable symbol versioning if none can be
3600 # found.
3601 if test -z "$ac_cv_path_CXXFILT"; then
3602 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3603 AC_MSG_WARN([=== no GNU c++filt could be found.])
3604 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3605 enable_symvers=no
3606 else
3607 enable_symvers=sun
3608 fi
3609 ;;
3610 *)
3611 enable_symvers=no ;;
3612 esac
3613 fi
3614 fi
3615 fi
3617 # Check to see if 'darwin' or 'darwin-export' can win.
3618 if test x$enable_symvers = xdarwin-export ; then
3619 enable_symvers=darwin
3620 fi
3622 # Check if 'sun' was requested on non-Solaris 2 platforms.
3623 if test x$enable_symvers = xsun ; then
3624 case ${target_os} in
3625 solaris2*)
3626 # All fine.
3627 ;;
3628 *)
3629 # Unlikely to work.
3630 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3631 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3632 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3633 enable_symvers=no
3634 ;;
3635 esac
3636 fi
3638 # Check to see if 'gnu' can win.
3639 if test $enable_symvers = gnu ||
3640 test $enable_symvers = gnu-versioned-namespace ||
3641 test $enable_symvers = sun; then
3642 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3643 AC_MSG_CHECKING([for shared libgcc])
3644 ac_save_CFLAGS="$CFLAGS"
3645 CFLAGS=' -lgcc_s'
3646 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3647 CFLAGS="$ac_save_CFLAGS"
3648 if test $glibcxx_shared_libgcc = no; then
3649 cat > conftest.c <<EOF
3650 int main (void) { return 0; }
3651 EOF
3652 changequote(,)dnl
3653 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3654 -shared -shared-libgcc -o conftest.so \
3655 conftest.c -v 2>&1 >/dev/null \
3656 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3657 changequote([,])dnl
3658 rm -f conftest.c conftest.so
3659 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3660 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3661 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3662 CFLAGS="$ac_save_CFLAGS"
3663 fi
3664 fi
3665 AC_MSG_RESULT($glibcxx_shared_libgcc)
3667 # For GNU ld, we need at least this version. The format is described in
3668 # GLIBCXX_CHECK_LINKER_FEATURES above.
3669 glibcxx_min_gnu_ld_version=21400
3671 # If no shared libgcc, can't win.
3672 if test $glibcxx_shared_libgcc != yes; then
3673 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3674 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3675 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3676 enable_symvers=no
3677 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3678 : All interesting versions of Sun ld support sun style symbol versioning.
3679 elif test $with_gnu_ld != yes ; then
3680 # just fail for now
3681 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3682 AC_MSG_WARN([=== you are not using the GNU linker.])
3683 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3684 enable_symvers=no
3685 elif test $glibcxx_ld_is_gold = yes ; then
3686 : All versions of gold support symbol versioning.
3687 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3688 # The right tools, the right setup, but too old. Fallbacks?
3689 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3690 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3691 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3692 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3693 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3694 enable_symvers=no
3695 fi
3696 fi
3698 # For libtool versioning info, format is CURRENT:REVISION:AGE
3699 libtool_VERSION=6:22:0
3701 # Everything parsed; figure out what files and settings to use.
3702 case $enable_symvers in
3703 no)
3704 SYMVER_FILE=config/abi/pre/none.ver
3705 ;;
3706 gnu)
3707 SYMVER_FILE=config/abi/pre/gnu.ver
3708 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3709 [Define to use GNU versioning in the shared library.])
3710 ;;
3711 gnu-versioned-namespace)
3712 libtool_VERSION=7:0:0
3713 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3714 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3715 [Define to use GNU namespace versioning in the shared library.])
3716 ;;
3717 darwin)
3718 SYMVER_FILE=config/abi/pre/gnu.ver
3719 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3720 [Define to use darwin versioning in the shared library.])
3721 ;;
3722 sun)
3723 SYMVER_FILE=config/abi/pre/gnu.ver
3724 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3725 [Define to use Sun versioning in the shared library.])
3726 ;;
3727 esac
3729 if test x$enable_symvers != xno ; then
3730 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3731 [Define to use symbol versioning in the shared library.])
3732 fi
3734 AC_CACHE_CHECK([whether the target supports .symver directive],
3735 glibcxx_cv_have_as_symver_directive, [
3736 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3737 [], glibcxx_cv_have_as_symver_directive=yes,
3738 glibcxx_cv_have_as_symver_directive=no)])
3739 if test $glibcxx_cv_have_as_symver_directive = yes; then
3740 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3741 [Define to 1 if the target assembler supports .symver directive.])
3742 fi
3744 AC_SUBST(SYMVER_FILE)
3745 AC_SUBST(port_specific_symbol_files)
3746 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3747 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3748 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3749 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3750 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3751 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3753 if test $enable_symvers != no ; then
3754 case ${target_os} in
3755 # The Solaris 2 runtime linker doesn't support the GNU extension of
3756 # binding the same symbol to different versions
3757 solaris2*)
3758 ;;
3759 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3760 *)
3761 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3762 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3763 ;;
3764 esac
3765 fi
3767 # Now, set up compatibility support, if any.
3768 # In addition, need this to deal with std::size_t mangling in
3769 # src/compatibility.cc. In a perfect world, could use
3770 # typeid(std::size_t).name()[0] to do direct substitution.
3771 AC_MSG_CHECKING([for size_t as unsigned int])
3772 ac_save_CFLAGS="$CFLAGS"
3773 CFLAGS="-Werror"
3774 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3775 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3776 CFLAGS=$ac_save_CFLAGS
3777 if test "$glibcxx_size_t_is_i" = yes; then
3778 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3779 fi
3780 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3782 AC_MSG_CHECKING([for ptrdiff_t as int])
3783 ac_save_CFLAGS="$CFLAGS"
3784 CFLAGS="-Werror"
3785 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3786 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3787 CFLAGS=$ac_save_CFLAGS
3788 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3789 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3790 fi
3791 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3792 ])
3795 dnl
3796 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3797 dnl We must stage the required headers so that they will be installed
3798 dnl with the library (unlike libgcc, the STL implementation is provided
3799 dnl solely within headers). Since we must not inject random user-space
3800 dnl macro names into user-provided C++ code, we first stage into <file>-in
3801 dnl and process to <file> with an output command. The reason for a two-
3802 dnl stage process here is to correctly handle $srcdir!=$objdir without
3803 dnl having to write complex code (the sed commands to clean the macro
3804 dnl namespace are complex and fragile enough as it is). We must also
3805 dnl add a relative path so that -I- is supported properly.
3806 dnl
3807 dnl Substs:
3808 dnl thread_header
3809 dnl
3810 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3811 AC_MSG_CHECKING([for thread model used by GCC])
3812 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3813 AC_MSG_RESULT([$target_thread_file])
3814 GCC_AC_THREAD_HEADER([$target_thread_file])
3815 ])
3818 dnl
3819 dnl Check if gthread implementation defines the types and functions
3820 dnl required by the c++0x thread library. Conforming gthread
3821 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3822 dnl
3823 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3824 dnl
3825 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3826 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3828 if test x$enable_libstdcxx_threads = xauto ||
3829 test x$enable_libstdcxx_threads = xyes; then
3831 AC_LANG_SAVE
3832 AC_LANG_CPLUSPLUS
3834 ac_save_CXXFLAGS="$CXXFLAGS"
3835 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3836 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3838 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3839 case $target_thread_file in
3840 posix)
3841 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3842 esac
3844 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3846 AC_TRY_COMPILE([#include <unistd.h>],
3847 [
3848 // In case of POSIX threads check _POSIX_TIMEOUTS.
3849 #if (defined(_PTHREADS) \
3850 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3851 #error
3852 #endif
3853 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3855 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3856 [Define to 1 if mutex_timedlock is available.])
3858 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3859 else res_mutex_timedlock=no ; fi
3860 AC_MSG_RESULT([$res_mutex_timedlock])
3862 AC_MSG_CHECKING([for gthreads library])
3864 AC_TRY_COMPILE([#include "gthr.h"],
3865 [
3866 #ifndef __GTHREADS_CXX0X
3867 #error
3868 #endif
3869 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3870 else
3871 ac_has_gthreads=no
3872 fi
3874 AC_MSG_RESULT([$ac_has_gthreads])
3876 if test x"$ac_has_gthreads" = x"yes"; then
3877 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3878 [Define if gthreads library is available.])
3880 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
3881 AC_CHECK_TYPE([pthread_rwlock_t],
3882 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
3883 [Define if POSIX read/write locks are available in <gthr.h>.])],
3884 [],
3885 [#include "gthr.h"])
3886 fi
3888 CXXFLAGS="$ac_save_CXXFLAGS"
3889 AC_LANG_RESTORE
3890 ])
3893 # Check whether LC_MESSAGES is available in <locale.h>.
3894 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3895 #
3896 # This file file be copied and used freely without restrictions. It can
3897 # be used in projects which are not available under the GNU Public License
3898 # but which still want to provide support for the GNU gettext functionality.
3899 # Please note that the actual code is *not* freely available.
3900 AC_DEFUN([AC_LC_MESSAGES], [
3901 AC_CHECK_HEADER(locale.h, [
3902 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3903 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3904 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3905 if test $ac_cv_val_LC_MESSAGES = yes; then
3906 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3907 [Define if LC_MESSAGES is available in <locale.h>.])
3908 fi
3909 ])
3910 ])
3912 dnl
3913 dnl Check whether rdrand is supported in the assembler.
3914 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3915 AC_MSG_CHECKING([for rdrand support in assembler])
3916 AC_CACHE_VAL(ac_cv_x86_rdrand, [
3917 ac_cv_x86_rdrand=no
3918 case "$target" in
3919 i?86-*-* | \
3920 x86_64-*-*)
3921 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3922 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3923 esac
3924 ])
3925 if test $ac_cv_x86_rdrand = yes; then
3926 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3927 [ Defined if as can handle rdrand. ])
3928 fi
3929 AC_MSG_RESULT($ac_cv_x86_rdrand)
3930 ])
3932 dnl
3933 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3934 dnl
3935 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3937 AC_LANG_SAVE
3938 AC_LANG_CPLUSPLUS
3939 ac_save_CXXFLAGS="$CXXFLAGS"
3940 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3942 AC_MSG_CHECKING([for get_nprocs])
3943 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3944 GCC_TRY_COMPILE_OR_LINK(
3945 [#include <sys/sysinfo.h>],
3946 [int n = get_nprocs();],
3947 [glibcxx_cv_GET_NPROCS=yes],
3948 [glibcxx_cv_GET_NPROCS=no])
3949 ])
3950 if test $glibcxx_cv_GET_NPROCS = yes; then
3951 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3952 fi
3953 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3955 CXXFLAGS="$ac_save_CXXFLAGS"
3956 AC_LANG_RESTORE
3957 ])
3959 dnl
3960 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3961 dnl
3962 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3964 AC_LANG_SAVE
3965 AC_LANG_CPLUSPLUS
3966 ac_save_CXXFLAGS="$CXXFLAGS"
3967 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3969 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3970 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3971 GCC_TRY_COMPILE_OR_LINK(
3972 [#include <unistd.h>],
3973 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3974 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3975 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3976 ])
3977 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3978 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3979 fi
3980 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3982 CXXFLAGS="$ac_save_CXXFLAGS"
3983 AC_LANG_RESTORE
3984 ])
3986 dnl
3987 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
3988 dnl
3989 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
3991 AC_LANG_SAVE
3992 AC_LANG_CPLUSPLUS
3993 ac_save_CXXFLAGS="$CXXFLAGS"
3994 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3996 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
3997 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
3998 GCC_TRY_COMPILE_OR_LINK(
3999 [#include <unistd.h>],
4000 [int n = sysconf(_SC_NPROC_ONLN);],
4001 [glibcxx_cv_SC_NPROC_ONLN=yes],
4002 [glibcxx_cv_SC_NPROC_ONLN=no])
4003 ])
4004 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
4005 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
4006 fi
4007 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
4009 CXXFLAGS="$ac_save_CXXFLAGS"
4010 AC_LANG_RESTORE
4011 ])
4013 dnl
4014 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
4015 dnl
4016 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
4018 AC_LANG_SAVE
4019 AC_LANG_CPLUSPLUS
4020 ac_save_CXXFLAGS="$CXXFLAGS"
4021 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4023 AC_MSG_CHECKING([for pthreads_num_processors_np])
4024 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
4025 GCC_TRY_COMPILE_OR_LINK(
4026 [#include <pthread.h>],
4027 [int n = pthread_num_processors_np();],
4028 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
4029 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
4030 ])
4031 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
4032 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
4033 fi
4034 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
4036 CXXFLAGS="$ac_save_CXXFLAGS"
4037 AC_LANG_RESTORE
4038 ])
4040 dnl
4041 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
4042 dnl
4043 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
4045 AC_LANG_SAVE
4046 AC_LANG_CPLUSPLUS
4047 ac_save_CXXFLAGS="$CXXFLAGS"
4048 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4050 AC_MSG_CHECKING([for hw.ncpu sysctl])
4051 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
4052 GCC_TRY_COMPILE_OR_LINK(
4053 [
4054 #include <stddef.h>
4055 #include <sys/sysctl.h>
4056 ],
4057 [
4058 int count;
4059 size_t size = sizeof(count);
4060 int mib[] = { CTL_HW, HW_NCPU };
4061 sysctl(mib, 2, &count, &size, NULL, 0);
4062 ],
4063 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
4064 [glibcxx_cv_SYSCTL_HW_NCPU=no])
4065 ])
4066 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
4067 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
4068 fi
4069 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
4071 CXXFLAGS="$ac_save_CXXFLAGS"
4072 AC_LANG_RESTORE
4073 ])
4075 dnl
4076 dnl Check to see if python pretty printing can be activated.
4077 dnl
4078 dnl --with-python-dir=dir
4079 dnl installs directory into $prefix/dir
4080 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4082 AC_MSG_CHECKING([for custom python install directory])
4083 AC_ARG_WITH([python-dir],
4084 AS_HELP_STRING([--with-python-dir],
4085 [the location to install Python modules. This path is relative starting from the prefix.]),
4086 [with_python_dir=$withval], [with_python_dir="no"])
4087 AC_MSG_RESULT(${with_python_dir})
4089 # Needed for installing Python modules during make install.
4090 python_mod_dir="${with_python_dir}"
4091 AC_SUBST(python_mod_dir)
4092 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4093 ])
4095 dnl
4096 dnl Check to see if -Werror is disabled.
4097 dnl
4098 dnl --enable-werror/--disable-werror
4099 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4100 AC_MSG_CHECKING([for -Werror])
4101 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4102 AC_MSG_RESULT($enable_werror)
4103 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4104 ])
4106 dnl
4107 dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4108 dnl and define _GLIBCXX_USE_TMPNAM.
4109 dnl
4110 AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4111 dnl
4112 AC_LANG_SAVE
4113 AC_LANG_CPLUSPLUS
4114 ac_save_CXXFLAGS="$CXXFLAGS"
4115 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4116 dnl
4117 AC_MSG_CHECKING([for tmpnam])
4118 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
4119 GCC_TRY_COMPILE_OR_LINK(
4120 [#include <stdio.h>],
4121 [char *tmp = tmpnam(NULL);],
4122 [glibcxx_cv_TMPNAM=yes],
4123 [glibcxx_cv_TMPNAM=no])
4124 ])
4125 if test $glibcxx_cv_TMPNAM = yes; then
4126 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4127 fi
4128 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
4129 dnl
4130 CXXFLAGS="$ac_save_CXXFLAGS"
4131 AC_LANG_RESTORE
4132 ])
4134 dnl
4135 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4136 dnl Some versions of sdt.h were not compatible with C++11.
4137 dnl
4138 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
4139 AC_MSG_CHECKING([for suitable sys/sdt.h])
4140 # Note that this test has to be run with the C language.
4141 # Otherwise, sdt.h will try to include some headers from
4142 # libstdc++ itself.
4143 AC_LANG_SAVE
4144 AC_LANG_C
4145 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
4146 # Because we have to run the test in C, we use grep rather
4147 # than the compiler to check for the bug. The bug is that
4148 # were strings without trailing whitespace, causing g++
4149 # to look for operator"". The pattern searches for the fixed
4150 # output.
4151 AC_EGREP_CPP([ \",\" ], [
4152 #include <sys/sdt.h>
4153 int f() { STAP_PROBE(hi, bob); }
4154 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4155 ])
4156 AC_LANG_RESTORE
4157 if test $glibcxx_cv_sys_sdt_h = yes; then
4158 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4159 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4160 fi
4161 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
4162 ])
4164 dnl
4165 dnl Control whether the library should define symbols for old and new ABIs.
4166 dnl This affects definitions of strings, stringstreams and locale facets.
4167 dnl
4168 dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
4169 dnl
4170 dnl Defines:
4171 dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
4172 dnl
4173 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4174 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
4175 if test x$enable_symvers = xgnu-versioned-namespace; then
4176 # gnu-versioned-namespace is incompatible with the dual ABI.
4177 enable_libstdcxx_dual_abi="no"
4178 fi
4179 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4180 AC_MSG_NOTICE([dual ABI is disabled])
4181 default_libstdcxx_abi="gcc4-compatible"
4182 fi
4183 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
4184 ])
4186 dnl
4187 dnl Check to see which ABI should be enabled by default.
4188 dnl
4189 dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
4190 dnl
4191 dnl Defines:
4192 dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4193 dnl
4194 AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4195 if test x$enable_libstdcxx_dual_abi = xyes; then
4196 AC_MSG_CHECKING([for default std::string ABI to use])
4197 AC_ARG_WITH([default-libstdcxx-abi],
4198 AS_HELP_STRING([--with-default-libstdcxx-abi],
4199 [set the std::string ABI to use by default]),
4200 [case "$withval" in
4201 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4202 new|cxx11) default_libstdcxx_abi="new" ;;
4203 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4204 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4205 esac
4206 ],
4207 [default_libstdcxx_abi="new"])
4208 AC_MSG_RESULT(${default_libstdcxx_abi})
4209 fi
4210 if test $default_libstdcxx_abi = "new"; then
4211 glibcxx_cxx11_abi=1
4212 glibcxx_cxx98_abi=0
4213 else
4214 glibcxx_cxx11_abi=0
4215 glibcxx_cxx98_abi=1
4216 fi
4217 AC_SUBST(glibcxx_cxx98_abi)
4218 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4219 ])
4221 dnl
4222 dnl Check to see whether to build libstdc++fs.a
4223 dnl
4224 dnl --enable-libstdcxx-filesystem-ts
4225 dnl
4226 AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4227 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4228 [turns on ISO/IEC TS 18822 support],
4229 [permit yes|no|auto])
4231 AC_MSG_CHECKING([whether to build Filesystem TS support])
4232 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4233 enable_libstdcxx_filesystem_ts=no
4234 fi
4235 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4236 case "${target_os}" in
4237 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4238 enable_libstdcxx_filesystem_ts=yes
4239 ;;
4240 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
4241 enable_libstdcxx_filesystem_ts=yes
4242 ;;
4243 solaris*)
4244 enable_libstdcxx_filesystem_ts=yes
4245 ;;
4246 *)
4247 enable_libstdcxx_filesystem_ts=no
4248 ;;
4249 esac
4250 fi
4251 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4252 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4253 ])
4255 dnl
4256 dnl Check whether the library calls required by the Filesystem TS are present
4257 dnl and define _GLIBCXX_USE_REALPATH and _GLIBCXX_USE_UTIMENSAT.
4258 dnl
4259 AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4260 dnl
4261 AC_LANG_SAVE
4262 AC_LANG_CPLUSPLUS
4263 ac_save_CXXFLAGS="$CXXFLAGS"
4264 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4265 dnl
4266 AC_MSG_CHECKING([for struct dirent.d_type])
4267 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
4268 GCC_TRY_COMPILE_OR_LINK(
4269 [#include <dirent.h>],
4270 [
4271 struct dirent d;
4272 if (sizeof d.d_type) return 0;
4273 ],
4274 [glibcxx_cv_dirent_d_type=yes],
4275 [glibcxx_cv_dirent_d_type=no])
4276 ])
4277 if test $glibcxx_cv_dirent_d_type = yes; then
4278 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
4279 fi
4280 AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
4281 dnl
4282 AC_MSG_CHECKING([for realpath])
4283 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
4284 GCC_TRY_COMPILE_OR_LINK(
4285 [
4286 #include <stdlib.h>
4287 #include <unistd.h>
4288 ],
4289 [
4290 #if _XOPEN_VERSION < 500
4291 #error
4292 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4293 char *tmp = realpath((const char*)NULL, (char*)NULL);
4294 #else
4295 #error
4296 #endif
4297 ],
4298 [glibcxx_cv_realpath=yes],
4299 [glibcxx_cv_realpath=no])
4300 ])
4301 if test $glibcxx_cv_realpath = yes; then
4302 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
4303 fi
4304 AC_MSG_RESULT($glibcxx_cv_realpath)
4305 dnl
4306 AC_MSG_CHECKING([for utimensat])
4307 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl
4308 GCC_TRY_COMPILE_OR_LINK(
4309 [
4310 #include <fcntl.h>
4311 #include <sys/stat.h>
4312 ],
4313 [
4314 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4315 int i = utimensat(AT_FDCWD, "path", ts, 0);
4316 ],
4317 [glibcxx_cv_utimensat=yes],
4318 [glibcxx_cv_utimensat=no])
4319 ])
4320 if test $glibcxx_cv_utimensat = yes; then
4321 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4322 fi
4323 AC_MSG_RESULT($glibcxx_cv_utimensat)
4324 dnl
4325 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec])
4326 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl
4327 GCC_TRY_COMPILE_OR_LINK(
4328 [ #include <sys/stat.h> ],
4329 [
4330 struct stat st;
4331 return st.st_mtim.tv_nsec;
4332 ],
4333 [glibcxx_cv_st_mtim=yes],
4334 [glibcxx_cv_st_mtim=no])
4335 ])
4336 if test $glibcxx_cv_st_mtim = yes; then
4337 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4338 fi
4339 AC_MSG_RESULT($glibcxx_cv_st_mtim)
4340 dnl
4341 AC_MSG_CHECKING([for fchmod])
4342 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl
4343 GCC_TRY_COMPILE_OR_LINK(
4344 [#include <sys/stat.h>],
4345 [fchmod(1, S_IWUSR);],
4346 [glibcxx_cv_fchmod=yes],
4347 [glibcxx_cv_fchmod=no])
4348 ])
4349 if test $glibcxx_cv_fchmod = yes; then
4350 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4351 fi
4352 AC_MSG_RESULT($glibcxx_cv_fchmod)
4353 dnl
4354 AC_MSG_CHECKING([for fchmodat])
4355 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl
4356 GCC_TRY_COMPILE_OR_LINK(
4357 [
4358 #include <fcntl.h>
4359 #include <sys/stat.h>
4360 ],
4361 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4362 [glibcxx_cv_fchmodat=yes],
4363 [glibcxx_cv_fchmodat=no])
4364 ])
4365 if test $glibcxx_cv_fchmodat = yes; then
4366 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4367 fi
4368 AC_MSG_RESULT($glibcxx_cv_fchmodat)
4369 dnl
4370 AC_MSG_CHECKING([for sendfile that can copy files])
4371 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl
4372 case "${target_os}" in
4373 gnu* | linux* | solaris*)
4374 GCC_TRY_COMPILE_OR_LINK(
4375 [#include <sys/sendfile.h>],
4376 [sendfile(1, 2, (off_t*)0, sizeof 1);],
4377 [glibcxx_cv_sendfile=yes],
4378 [glibcxx_cv_sendfile=no])
4379 ;;
4380 *)
4381 glibcxx_cv_sendfile=no
4382 ;;
4383 esac
4384 ])
4385 if test $glibcxx_cv_sendfile = yes; then
4386 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.])
4387 fi
4388 AC_MSG_RESULT($glibcxx_cv_sendfile)
4389 dnl
4390 CXXFLAGS="$ac_save_CXXFLAGS"
4391 AC_LANG_RESTORE
4392 ])
4394 dnl
4395 dnl Check how size_t is mangled. Copied from libitm.
4396 dnl
4397 AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [
4398 AC_CACHE_CHECK([how size_t is mangled],
4399 glibcxx_cv_size_t_mangling, [
4400 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
4401 [glibcxx_cv_size_t_mangling=m], [
4402 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
4403 [glibcxx_cv_size_t_mangling=j], [
4404 AC_TRY_COMPILE([],
4405 [extern __SIZE_TYPE__ x; extern unsigned long long x;],
4406 [glibcxx_cv_size_t_mangling=y], [
4407 AC_TRY_COMPILE([],
4408 [extern __SIZE_TYPE__ x; extern unsigned short x;],
4409 [glibcxx_cv_size_t_mangling=t],
4410 [glibcxx_cv_size_t_mangling=x])
4411 ])
4412 ])
4413 ])
4414 ])
4415 if test $glibcxx_cv_size_t_mangling = x; then
4416 AC_MSG_ERROR([Unknown underlying type for size_t])
4417 fi
4418 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling],
4419 [Define to the letter to which size_t is mangled.])
4420 ])
4422 # Macros from the top-level gcc directory.
4423 m4_include([../config/gc++filt.m4])
4424 m4_include([../config/tls.m4])
4425 m4_include([../config/gthr.m4])