| blob | c88e4732d0bd80c8546931c188ca53e77bf87e62 |
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 # Do checks for resource limit functions.
636 GLIBCXX_CHECK_SETRLIMIT
638 if $GLIBCXX_IS_NATIVE ; then
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, $glibcxx_cv_stdio_seek_end,
2146 [Define to the value of the SEEK_END integer constant.])
2147 ])
2149 dnl
2150 dnl Check whether required C++ overloads are present in <stdio.h>.
2151 dnl
2152 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
2154 AC_LANG_SAVE
2155 AC_LANG_CPLUSPLUS
2156 # Use C++11 because a conforming <stdio.h> won't define gets for C++14,
2157 # and we don't need a declaration for C++14 anyway.
2158 ac_save_CXXFLAGS="$CXXFLAGS"
2159 CXXFLAGS="$CXXFLAGS -std=gnu++11"
2161 AC_MSG_CHECKING([for gets declaration])
2162 AC_CACHE_VAL(glibcxx_cv_gets, [
2163 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2164 [#include <stdio.h>
2165 namespace test
2166 {
2167 using ::gets;
2168 }
2169 ])],
2170 [glibcxx_cv_gets=yes],
2171 [glibcxx_cv_gets=no]
2172 )])
2174 if test $glibcxx_cv_gets = yes; then
2175 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.])
2176 fi
2177 AC_MSG_RESULT($glibcxx_cv_gets)
2179 CXXFLAGS="$ac_save_CXXFLAGS"
2180 AC_LANG_RESTORE
2181 ])
2183 dnl
2184 dnl Check whether required C++11 overloads for floating point and integral
2185 dnl types are present in <math.h>.
2186 dnl
2187 AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
2189 AC_LANG_SAVE
2190 AC_LANG_CPLUSPLUS
2191 ac_save_CXXFLAGS="$CXXFLAGS"
2192 CXXFLAGS="$CXXFLAGS -std=c++11"
2194 case "$host" in
2195 *-*-solaris2.*)
2196 # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch
2197 # 11996[67]-02 introduced the C++11 <math.h> floating point overloads.
2198 AC_MSG_CHECKING([for C++11 <math.h> floating point overloads])
2199 AC_CACHE_VAL(glibcxx_cv_math11_fp_overload, [
2200 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2201 [#include <math.h>
2202 #undef isfinite
2203 namespace std {
2204 inline bool isfinite(float __x)
2205 { return __builtin_isfinite(__x); }
2206 }
2207 ])],
2208 [glibcxx_cv_math11_fp_overload=no],
2209 [glibcxx_cv_math11_fp_overload=yes]
2210 )])
2212 # autoheader cannot handle indented templates.
2213 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP],
2214 [/* Define if all C++11 floating point overloads are available in <math.h>. */
2215 #if __cplusplus >= 201103L
2216 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP
2217 #endif])
2219 if test $glibcxx_cv_math11_fp_overload = yes; then
2220 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP)
2221 fi
2222 AC_MSG_RESULT([$glibcxx_cv_math11_fp_overload])
2224 # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch
2225 # 11996[67]-02 introduced the C++11 <math.h> integral type overloads.
2226 AC_MSG_CHECKING([for C++11 <math.h> integral type overloads])
2227 AC_CACHE_VAL(glibcxx_cv_math11_int_overload, [
2228 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2229 [#include <math.h>
2230 namespace std {
2231 template<typename _Tp>
2232 struct __is_integer;
2233 template<>
2234 struct __is_integer<int>
2235 {
2236 enum { __value = 1 };
2237 };
2238 }
2239 namespace __gnu_cxx {
2240 template<bool, typename>
2241 struct __enable_if;
2242 template<typename _Tp>
2243 struct __enable_if<true, _Tp>
2244 { typedef _Tp __type; };
2245 }
2246 namespace std {
2247 template<typename _Tp>
2248 constexpr typename __gnu_cxx::__enable_if
2249 <__is_integer<_Tp>::__value, double>::__type
2250 log2(_Tp __x)
2251 { return __builtin_log2(__x); }
2252 }
2253 int
2254 main (void)
2255 {
2256 int i = 1000;
2257 return std::log2(i);
2258 }
2259 ])],
2260 [glibcxx_cv_math11_int_overload=no],
2261 [glibcxx_cv_math11_int_overload=yes]
2262 )])
2264 # autoheader cannot handle indented templates.
2265 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT],
2266 [/* Define if all C++11 integral type overloads are available in <math.h>. */
2267 #if __cplusplus >= 201103L
2268 #undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT
2269 #endif])
2271 if test $glibcxx_cv_math11_int_overload = yes; then
2272 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT)
2273 fi
2274 AC_MSG_RESULT([$glibcxx_cv_math11_int_overload])
2275 ;;
2276 *)
2277 # If <math.h> defines the obsolete isinf(double) and isnan(double)
2278 # functions (instead of or as well as the C99 generic macros) then we
2279 # can't define std::isinf(double) and std::isnan(double) in <cmath>
2280 # and must use the ones from <math.h> instead.
2281 AC_MSG_CHECKING([for obsolete isinf function in <math.h>])
2282 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf, [
2283 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2284 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2285 #include <math.h>
2286 #undef isinf
2287 namespace std {
2288 using ::isinf;
2289 bool isinf(float);
2290 bool isinf(long double);
2291 }
2292 using std::isinf;
2293 bool b = isinf(0.0);
2294 ])],
2295 [glibcxx_cv_obsolete_isinf=yes],
2296 [glibcxx_cv_obsolete_isinf=no]
2297 )])
2298 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf])
2299 if test $glibcxx_cv_obsolete_isinf = yes; then
2300 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1,
2301 [Define if <math.h> defines obsolete isinf function.])
2302 fi
2304 AC_MSG_CHECKING([for obsolete isnan function in <math.h>])
2305 AC_CACHE_VAL(glibcxx_cv_obsolete_isnan, [
2306 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2307 [#include <math.h>
2308 #undef isnan
2309 namespace std {
2310 using ::isnan;
2311 bool isnan(float);
2312 bool isnan(long double);
2313 }
2314 using std::isnan;
2315 bool b = isnan(0.0);
2316 ])],
2317 [glibcxx_cv_obsolete_isnan=yes],
2318 [glibcxx_cv_obsolete_isnan=no]
2319 )])
2320 AC_MSG_RESULT([$glibcxx_cv_obsolete_isnan])
2321 if test $glibcxx_cv_obsolete_isnan = yes; then
2322 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1,
2323 [Define if <math.h> defines obsolete isnan function.])
2324 fi
2325 ;;
2326 esac
2328 CXXFLAGS="$ac_save_CXXFLAGS"
2329 AC_LANG_RESTORE
2330 ])
2332 dnl
2333 dnl Check whether macros, etc are present for <system_error>
2334 dnl
2335 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
2337 m4_pushdef([n_syserr], [1])dnl
2338 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
2339 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
2340 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
2341 ECHILD, ENOSPC, EPERM,
2342 ETIMEDOUT, EWOULDBLOCK],
2343 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
2344 AC_MSG_CHECKING([for syserr])
2345 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
2346 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
2347 [int i = syserr;])],
2348 [glibcxx_cv_system_error[]n_syserr=yes],
2349 [glibcxx_cv_system_error[]n_syserr=no])
2350 ])
2351 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
2352 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
2353 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
2354 fi
2355 m4_define([n_syserr], m4_incr(n_syserr))dnl
2356 m4_popdef([SYSERR])dnl
2357 ])
2358 m4_popdef([n_syserr])dnl
2359 ])
2361 dnl
2362 dnl Check for what type of C headers to use.
2363 dnl
2364 dnl --enable-cheaders= [does stuff].
2365 dnl --disable-cheaders [does not do anything, really].
2366 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
2367 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
2368 dnl
2369 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
2370 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
2371 [construct "C" headers for g++], [permit c|c_std|c_global])
2372 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2374 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2376 # Allow overrides to configure.host here.
2377 if test $enable_cheaders = c_global; then
2378 c_compatibility=yes
2379 fi
2381 AC_SUBST(C_INCLUDE_DIR)
2382 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2383 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
2384 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
2385 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
2386 ])
2389 dnl
2390 dnl Check for which locale library to use. The choice is mapped to
2391 dnl a subdirectory of config/locale.
2392 dnl
2393 dnl Default is generic.
2394 dnl
2395 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
2396 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
2397 [use MODEL for target locale package],
2398 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
2400 # Deal with gettext issues. Default to not using it (=no) until we detect
2401 # support for it later. Let the user turn it off via --e/d, but let that
2402 # default to on for easier handling.
2403 USE_NLS=no
2404 AC_ARG_ENABLE(nls,
2405 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2406 [],
2407 [enable_nls=yes])
2409 # Either a known package, or "auto"
2410 if test $enable_clocale = no || test $enable_clocale = yes; then
2411 enable_clocale=auto
2412 fi
2413 enable_clocale_flag=$enable_clocale
2415 # Probe for locale model to use if none specified.
2416 # Default to "generic".
2417 if test $enable_clocale_flag = auto; then
2418 case ${target_os} in
2419 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2420 enable_clocale_flag=gnu
2421 ;;
2422 darwin*)
2423 enable_clocale_flag=darwin
2424 ;;
2425 dragonfly* | freebsd*)
2426 enable_clocale_flag=dragonfly
2427 ;;
2428 openbsd*)
2429 enable_clocale_flag=newlib
2430 ;;
2431 *)
2432 if test x"$with_newlib" = x"yes"; then
2433 enable_clocale_flag=newlib
2434 else
2435 enable_clocale_flag=generic
2436 fi
2437 ;;
2438 esac
2439 fi
2441 # Sanity check model, and test for special functionality.
2442 if test $enable_clocale_flag = gnu; then
2443 AC_EGREP_CPP([_GLIBCXX_ok], [
2444 #include <features.h>
2445 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
2446 _GLIBCXX_ok
2447 #endif
2448 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2450 # Set it to scream when it hurts.
2451 ac_save_CFLAGS="$CFLAGS"
2452 CFLAGS="-Wimplicit-function-declaration -Werror"
2454 # Use strxfrm_l if available.
2455 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2456 #include <string.h>
2457 #include <locale.h>],
2458 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2459 AC_DEFINE(HAVE_STRXFRM_L, 1,
2460 [Define if strxfrm_l is available in <string.h>.]),)
2462 # Use strerror_l if available.
2463 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2464 #include <string.h>
2465 #include <locale.h>],
2466 [__locale_t loc; strerror_l(5, loc);],
2467 AC_DEFINE(HAVE_STRERROR_L, 1,
2468 [Define if strerror_l is available in <string.h>.]),)
2470 CFLAGS="$ac_save_CFLAGS"
2471 fi
2473 # Perhaps use strerror_r if available, and strerror_l isn't.
2474 ac_save_CFLAGS="$CFLAGS"
2475 CFLAGS="-Wimplicit-function-declaration -Werror"
2476 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2477 #include <string.h>
2478 #include <locale.h>],
2479 [char s[128]; strerror_r(5, s, 128);],
2480 AC_DEFINE(HAVE_STRERROR_R, 1,
2481 [Define if strerror_r is available in <string.h>.]),)
2482 CFLAGS="$ac_save_CFLAGS"
2484 # Set configure bits for specified locale package
2485 AC_MSG_CHECKING([for C locale to use])
2486 case ${enable_clocale_flag} in
2487 generic)
2488 AC_MSG_RESULT(generic)
2490 CLOCALE_H=config/locale/generic/c_locale.h
2491 CLOCALE_CC=config/locale/generic/c_locale.cc
2492 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2493 CCOLLATE_CC=config/locale/generic/collate_members.cc
2494 CCTYPE_CC=config/locale/generic/ctype_members.cc
2495 CMESSAGES_H=config/locale/generic/messages_members.h
2496 CMESSAGES_CC=config/locale/generic/messages_members.cc
2497 CMONEY_CC=config/locale/generic/monetary_members.cc
2498 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2499 CTIME_H=config/locale/generic/time_members.h
2500 CTIME_CC=config/locale/generic/time_members.cc
2501 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2502 ;;
2503 darwin)
2504 AC_MSG_RESULT(darwin)
2506 CLOCALE_H=config/locale/generic/c_locale.h
2507 CLOCALE_CC=config/locale/generic/c_locale.cc
2508 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2509 CCOLLATE_CC=config/locale/generic/collate_members.cc
2510 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2511 CMESSAGES_H=config/locale/generic/messages_members.h
2512 CMESSAGES_CC=config/locale/generic/messages_members.cc
2513 CMONEY_CC=config/locale/generic/monetary_members.cc
2514 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2515 CTIME_H=config/locale/generic/time_members.h
2516 CTIME_CC=config/locale/generic/time_members.cc
2517 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2518 ;;
2520 dragonfly)
2521 AC_MSG_RESULT(dragonfly or freebsd)
2523 CLOCALE_H=config/locale/dragonfly/c_locale.h
2524 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
2525 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2526 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
2527 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2528 CMESSAGES_H=config/locale/generic/messages_members.h
2529 CMESSAGES_CC=config/locale/generic/messages_members.cc
2530 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2531 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2532 CTIME_H=config/locale/dragonfly/time_members.h
2533 CTIME_CC=config/locale/dragonfly/time_members.cc
2534 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2535 ;;
2537 gnu)
2538 AC_MSG_RESULT(gnu)
2540 # Declare intention to use gettext, and add support for specific
2541 # languages.
2542 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2543 ALL_LINGUAS="de fr"
2545 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2546 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2547 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2548 USE_NLS=yes
2549 fi
2550 # Export the build objects.
2551 for ling in $ALL_LINGUAS; do \
2552 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2553 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2554 done
2555 AC_SUBST(glibcxx_MOFILES)
2556 AC_SUBST(glibcxx_POFILES)
2558 CLOCALE_H=config/locale/gnu/c_locale.h
2559 CLOCALE_CC=config/locale/gnu/c_locale.cc
2560 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2561 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2562 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2563 CMESSAGES_H=config/locale/gnu/messages_members.h
2564 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2565 CMONEY_CC=config/locale/gnu/monetary_members.cc
2566 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2567 CTIME_H=config/locale/gnu/time_members.h
2568 CTIME_CC=config/locale/gnu/time_members.cc
2569 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2570 ;;
2571 ieee_1003.1-2001)
2572 AC_MSG_RESULT(IEEE 1003.1)
2574 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2575 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2576 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2577 CCOLLATE_CC=config/locale/generic/collate_members.cc
2578 CCTYPE_CC=config/locale/generic/ctype_members.cc
2579 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2580 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2581 CMONEY_CC=config/locale/generic/monetary_members.cc
2582 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2583 CTIME_H=config/locale/generic/time_members.h
2584 CTIME_CC=config/locale/generic/time_members.cc
2585 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2586 ;;
2587 newlib)
2588 AC_MSG_RESULT(newlib)
2590 CLOCALE_H=config/locale/generic/c_locale.h
2591 CLOCALE_CC=config/locale/generic/c_locale.cc
2592 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2593 CCOLLATE_CC=config/locale/generic/collate_members.cc
2594 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2595 CMESSAGES_H=config/locale/generic/messages_members.h
2596 CMESSAGES_CC=config/locale/generic/messages_members.cc
2597 CMONEY_CC=config/locale/generic/monetary_members.cc
2598 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2599 CTIME_H=config/locale/generic/time_members.h
2600 CTIME_CC=config/locale/generic/time_members.cc
2601 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2602 ;;
2603 esac
2605 # This is where the testsuite looks for locale catalogs, using the
2606 # -DLOCALEDIR define during testsuite compilation.
2607 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2608 AC_SUBST(glibcxx_localedir)
2610 # A standalone libintl (e.g., GNU libintl) may be in use.
2611 if test $USE_NLS = yes; then
2612 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2613 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2614 fi
2615 if test $USE_NLS = yes; then
2616 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2617 [Define if NLS translations are to be used.])
2618 fi
2620 AC_SUBST(USE_NLS)
2621 AC_SUBST(CLOCALE_H)
2622 AC_SUBST(CMESSAGES_H)
2623 AC_SUBST(CCODECVT_CC)
2624 AC_SUBST(CCOLLATE_CC)
2625 AC_SUBST(CCTYPE_CC)
2626 AC_SUBST(CMESSAGES_CC)
2627 AC_SUBST(CMONEY_CC)
2628 AC_SUBST(CNUMERIC_CC)
2629 AC_SUBST(CTIME_H)
2630 AC_SUBST(CTIME_CC)
2631 AC_SUBST(CLOCALE_CC)
2632 AC_SUBST(CLOCALE_INTERNAL_H)
2633 ])
2636 dnl
2637 dnl Check for which std::allocator base class to use. The choice is
2638 dnl mapped from a subdirectory of include/ext.
2639 dnl
2640 dnl Default is new.
2641 dnl
2642 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2643 AC_MSG_CHECKING([for std::allocator base class])
2644 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2645 [use KIND for target std::allocator base],
2646 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2648 # If they didn't use this option switch, or if they specified --enable
2649 # with no specific model, we'll have to look for one. If they
2650 # specified --disable (???), do likewise.
2651 if test $enable_libstdcxx_allocator = no ||
2652 test $enable_libstdcxx_allocator = yes;
2653 then
2654 enable_libstdcxx_allocator=auto
2655 fi
2657 # Either a known package, or "auto". Auto implies the default choice
2658 # for a particular platform.
2659 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2661 # Probe for host-specific support if no specific model is specified.
2662 # Default to "new".
2663 if test $enable_libstdcxx_allocator_flag = auto; then
2664 case ${target_os} in
2665 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2666 enable_libstdcxx_allocator_flag=new
2667 ;;
2668 *)
2669 enable_libstdcxx_allocator_flag=new
2670 ;;
2671 esac
2672 fi
2673 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2676 # Set configure bits for specified locale package
2677 case ${enable_libstdcxx_allocator_flag} in
2678 bitmap)
2679 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2680 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2681 ;;
2682 malloc)
2683 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2684 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2685 ;;
2686 mt)
2687 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2688 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2689 ;;
2690 new)
2691 ALLOCATOR_H=config/allocator/new_allocator_base.h
2692 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2693 ;;
2694 pool)
2695 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2696 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2697 ;;
2698 esac
2700 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW,
2701 test $enable_libstdcxx_allocator_flag = new)
2702 AC_SUBST(ALLOCATOR_H)
2703 AC_SUBST(ALLOCATOR_NAME)
2704 ])
2707 dnl
2708 dnl Check for whether the Boost-derived checks should be turned on.
2709 dnl
2710 dnl --enable-concept-checks turns them on.
2711 dnl --disable-concept-checks leaves them off.
2712 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2713 dnl Where DEFAULT is either `yes' or `no'.
2714 dnl
2715 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2716 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2717 if test $enable_concept_checks = yes; then
2718 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2719 [Define to use concept checking code from the boost libraries.])
2720 fi
2721 ])
2723 dnl
2724 dnl Use extern templates.
2725 dnl
2726 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2727 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2729 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2730 dnl Where DEFAULT is `yes' or `no'.
2731 dnl
2732 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2734 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2736 AC_MSG_CHECKING([for extern template support])
2737 AC_MSG_RESULT([$enable_extern_template])
2739 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2740 ])
2742 dnl
2743 dnl Use vtable verification.
2744 dnl
2745 dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2746 dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2748 dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2749 dnl Where DEFAULT is `yes' or `no'.
2750 dnl
2751 AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2753 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2755 AC_MSG_CHECKING([for vtable verify support])
2756 AC_MSG_RESULT([$enable_vtable_verify])
2758 vtv_cygmin=no
2759 if test $enable_vtable_verify = yes; then
2760 case ${target_os} in
2761 cygwin*|mingw32*)
2762 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2763 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2764 vtv_cygmin=yes
2765 ;;
2766 darwin*)
2767 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2768 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2769 ;;
2770 solaris2*)
2771 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2772 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2773 ;;
2774 *)
2775 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2776 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
2777 ;;
2778 esac
2779 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2780 else
2781 VTV_CXXFLAGS=
2782 VTV_PCH_CXXFLAGS=
2783 VTV_CXXLINKFLAGS=
2784 fi
2786 AC_SUBST(VTV_CXXFLAGS)
2787 AC_SUBST(VTV_PCH_CXXFLAGS)
2788 AC_SUBST(VTV_CXXLINKFLAGS)
2789 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2790 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2791 ])
2793 dnl
2794 dnl Check for parallel mode pre-requisites, including OpenMP support.
2795 dnl
2796 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2797 dnl
2798 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2800 enable_parallel=no;
2802 # See if configured libgomp/omp.h exists. (libgomp may be in
2803 # noconfigdirs but not explicitly disabled.)
2804 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2805 enable_parallel=yes;
2806 else
2807 AC_MSG_NOTICE([target-libgomp not built])
2808 fi
2810 AC_MSG_CHECKING([for parallel mode support])
2811 AC_MSG_RESULT([$enable_parallel])
2812 ])
2815 dnl
2816 dnl Check for which I/O library to use: stdio, or something specific.
2817 dnl
2818 dnl Default is stdio.
2819 dnl
2820 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2821 AC_MSG_CHECKING([for underlying I/O to use])
2822 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2823 [use target-specific I/O package], [permit stdio])
2825 # Now that libio has been removed, you can have any color you want as long
2826 # as it's black. This is one big no-op until other packages are added, but
2827 # showing the framework never hurts.
2828 case ${enable_cstdio} in
2829 stdio)
2830 CSTDIO_H=config/io/c_io_stdio.h
2831 BASIC_FILE_H=config/io/basic_file_stdio.h
2832 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2833 AC_MSG_RESULT(stdio)
2834 ;;
2835 esac
2837 AC_SUBST(CSTDIO_H)
2838 AC_SUBST(BASIC_FILE_H)
2839 AC_SUBST(BASIC_FILE_CC)
2840 ])
2843 dnl
2844 dnl Check for "unusual" flags to pass to the compiler while building.
2845 dnl
2846 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2847 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2848 dnl --disable-cxx-flags passes nothing.
2849 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2850 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2851 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2852 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2853 dnl If "default flags" is an empty string, the effect is the same
2854 dnl as --disable or --enable=no.
2855 dnl
2856 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2857 AC_MSG_CHECKING([for extra compiler flags for building])
2858 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2859 [pass compiler FLAGS when building library],
2860 [case "x$enable_cxx_flags" in
2861 xno | x) enable_cxx_flags= ;;
2862 x-*) ;;
2863 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2864 esac])
2866 # Run through flags (either default or command-line) and set anything
2867 # extra (e.g., #defines) that must accompany particular g++ options.
2868 if test -n "$enable_cxx_flags"; then
2869 for f in $enable_cxx_flags; do
2870 case "$f" in
2871 -fhonor-std) ;;
2872 -*) ;;
2873 *) # and we're trying to pass /what/ exactly?
2874 AC_MSG_ERROR([compiler flags start with a -]) ;;
2875 esac
2876 done
2877 fi
2879 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2880 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2881 AC_SUBST(EXTRA_CXX_FLAGS)
2882 ])
2885 dnl
2886 dnl Check to see if debugging libraries are to be built.
2887 dnl
2888 dnl --enable-libstdcxx-debug
2889 dnl builds a separate set of debugging libraries in addition to the
2890 dnl normal (shared, static) libstdc++ binaries.
2891 dnl
2892 dnl --disable-libstdcxx-debug
2893 dnl builds only one (non-debug) version of libstdc++.
2894 dnl
2895 dnl --enable-libstdcxx-debug-flags=FLAGS
2896 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2897 dnl
2898 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2899 dnl Where DEFAULT is either `yes' or `no'.
2900 dnl
2901 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2902 AC_MSG_CHECKING([for additional debug build])
2903 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2904 AC_MSG_RESULT($enable_libstdcxx_debug)
2905 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2906 ])
2909 dnl
2910 dnl Check for explicit debug flags.
2911 dnl
2912 dnl --enable-libstdcxx-debug-flags='-O1'
2913 dnl is a general method for passing flags to be used when
2914 dnl building debug libraries with --enable-libstdcxx-debug.
2915 dnl
2916 dnl --disable-libstdcxx-debug-flags does nothing.
2917 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2918 dnl If "default flags" is an empty string, the effect is the same
2919 dnl as --disable or --enable=no.
2920 dnl
2921 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2922 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2923 [pass compiler FLAGS when building debug library],
2924 [case "x$enable_libstdcxx_debug_flags" in
2925 xno | x) enable_libstdcxx_debug_flags= ;;
2926 x-*) ;;
2927 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2928 esac])
2930 # Option parsed, now set things appropriately
2931 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2932 AC_SUBST(DEBUG_FLAGS)
2934 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2935 ])
2938 dnl
2939 dnl Check if the user only wants a freestanding library implementation.
2940 dnl
2941 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2942 dnl installing only the headers required by [17.4.1.3] and the language
2943 dnl support library. More than that will be built (to keep the Makefiles
2944 dnl conveniently clean), but not installed.
2945 dnl
2946 dnl Sets:
2947 dnl is_hosted (yes/no)
2948 dnl
2949 dnl Defines:
2950 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2951 dnl
2952 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2953 AC_ARG_ENABLE([hosted-libstdcxx],
2954 AC_HELP_STRING([--disable-hosted-libstdcxx],
2955 [only build freestanding C++ runtime support]),,
2956 [case "$host" in
2957 arm*-*-symbianelf*)
2958 enable_hosted_libstdcxx=no
2959 ;;
2960 *)
2961 enable_hosted_libstdcxx=yes
2962 ;;
2963 esac])
2964 if test "$enable_hosted_libstdcxx" = no; then
2965 AC_MSG_NOTICE([Only freestanding libraries will be built])
2966 is_hosted=no
2967 hosted_define=0
2968 enable_abi_check=no
2969 enable_libstdcxx_pch=no
2970 else
2971 is_hosted=yes
2972 hosted_define=1
2973 fi
2974 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2975 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2976 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2977 ])
2980 dnl
2981 dnl Check if the user wants a non-verbose library implementation.
2982 dnl
2983 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2984 dnl standard error on termination.
2985 dnl
2986 dnl Defines:
2987 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2988 dnl
2989 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2990 AC_ARG_ENABLE([libstdcxx-verbose],
2991 AC_HELP_STRING([--disable-libstdcxx-verbose],
2992 [disable termination messages to standard error]),,
2993 [enable_libstdcxx_verbose=yes])
2994 if test x"$enable_libstdcxx_verbose" = xyes; then
2995 verbose_define=1
2996 else
2997 AC_MSG_NOTICE([verbose termination messages are disabled])
2998 verbose_define=0
2999 fi
3000 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
3001 [Define to 1 if a verbose library is built, or 0 otherwise.])
3002 ])
3005 dnl
3006 dnl Check for template specializations for the 'long long' type.
3007 dnl The result determines only whether 'long long' I/O is enabled; things
3008 dnl like numeric_limits<> specializations are always available.
3009 dnl
3010 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
3011 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
3012 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
3013 dnl Where DEFAULT is either `yes' or `no'.
3014 dnl
3015 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
3016 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
3017 if test $enable_long_long = yes; then
3018 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
3019 [Define if code specialized for long long should be used.])
3020 fi
3021 AC_MSG_CHECKING([for enabled long long specializations])
3022 AC_MSG_RESULT([$enable_long_long])
3023 ])
3026 dnl
3027 dnl Check for decimal floating point.
3028 dnl See:
3029 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
3030 dnl
3031 dnl This checks to see if the host supports decimal floating point types.
3032 dnl
3033 dnl Defines:
3034 dnl _GLIBCXX_USE_DECIMAL_FLOAT
3035 dnl
3036 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
3038 # Fake what AC_TRY_COMPILE does, without linking as this is
3039 # unnecessary for this test.
3041 cat > conftest.$ac_ext << EOF
3042 [#]line __oline__ "configure"
3043 int main()
3044 {
3045 _Decimal32 d1;
3046 _Decimal64 d2;
3047 _Decimal128 d3;
3048 return 0;
3049 }
3050 EOF
3052 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
3053 if AC_TRY_EVAL(ac_compile); then
3054 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
3055 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
3056 enable_dfp=yes
3057 else
3058 enable_dfp=no
3059 fi
3060 AC_MSG_RESULT($enable_dfp)
3061 rm -f conftest*
3062 ])
3064 dnl
3065 dnl Check for GNU 128-bit integer and floating point types.
3066 dnl
3067 dnl Note: also checks that the types aren't standard types.
3068 dnl
3069 dnl Defines:
3070 dnl _GLIBCXX_USE_INT128
3071 dnl _GLIBCXX_USE_FLOAT128
3072 dnl
3073 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
3075 AC_LANG_SAVE
3076 AC_LANG_CPLUSPLUS
3078 # Fake what AC_TRY_COMPILE does, without linking as this is
3079 # unnecessary for this test.
3081 cat > conftest.$ac_ext << EOF
3082 [#]line __oline__ "configure"
3083 template<typename T1, typename T2>
3084 struct same
3085 { typedef T2 type; };
3087 template<typename T>
3088 struct same<T, T>;
3090 int main()
3091 {
3092 typename same<long, __int128>::type i1;
3093 typename same<long long, __int128>::type i2;
3094 }
3095 EOF
3097 AC_MSG_CHECKING([for __int128])
3098 if AC_TRY_EVAL(ac_compile); then
3099 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
3100 [Define if __int128 is supported on this host.])
3101 enable_int128=yes
3102 else
3103 enable_int128=no
3104 fi
3105 AC_MSG_RESULT($enable_int128)
3106 rm -f conftest*
3108 cat > conftest.$ac_ext << EOF
3109 [#]line __oline__ "configure"
3110 template<typename T1, typename T2>
3111 struct same
3112 { typedef T2 type; };
3114 template<typename T>
3115 struct same<T, T>;
3117 int main()
3118 {
3119 typename same<double, __float128>::type f1;
3120 typename same<long double, __float128>::type f2;
3121 }
3122 EOF
3124 AC_MSG_CHECKING([for __float128])
3125 if AC_TRY_EVAL(ac_compile); then
3126 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
3127 [Define if __float128 is supported on this host.])
3128 enable_float128=yes
3129 else
3130 enable_float128=no
3131 fi
3132 AC_MSG_RESULT($enable_float128)
3133 rm -f conftest*
3135 AC_LANG_RESTORE
3136 ])
3138 dnl
3139 dnl Check for template specializations for the 'wchar_t' type.
3140 dnl
3141 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3142 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3143 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3144 dnl Where DEFAULT is either `yes' or `no'.
3145 dnl
3146 dnl Necessary support must also be present.
3147 dnl
3148 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3149 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
3151 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3152 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3153 AC_MSG_CHECKING([for mbstate_t])
3154 AC_TRY_COMPILE([#include <wchar.h>],
3155 [mbstate_t teststate;],
3156 have_mbstate_t=yes, have_mbstate_t=no)
3157 AC_MSG_RESULT($have_mbstate_t)
3158 if test x"$have_mbstate_t" = xyes; then
3159 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3160 fi
3162 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3163 # ac_has_wchar_h.
3164 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
3166 if test x"$enable_wchar_t" = x"yes"; then
3168 AC_LANG_SAVE
3169 AC_LANG_CPLUSPLUS
3171 if test x"$ac_has_wchar_h" = xyes &&
3172 test x"$ac_has_wctype_h" = xyes; then
3173 AC_TRY_COMPILE([#include <wchar.h>
3174 #include <stddef.h>
3175 wint_t i;
3176 long l = WEOF;
3177 long j = WCHAR_MIN;
3178 long k = WCHAR_MAX;
3179 namespace test
3180 {
3181 using ::btowc;
3182 using ::fgetwc;
3183 using ::fgetws;
3184 using ::fputwc;
3185 using ::fputws;
3186 using ::fwide;
3187 using ::fwprintf;
3188 using ::fwscanf;
3189 using ::getwc;
3190 using ::getwchar;
3191 using ::mbrlen;
3192 using ::mbrtowc;
3193 using ::mbsinit;
3194 using ::mbsrtowcs;
3195 using ::putwc;
3196 using ::putwchar;
3197 using ::swprintf;
3198 using ::swscanf;
3199 using ::ungetwc;
3200 using ::vfwprintf;
3201 using ::vswprintf;
3202 using ::vwprintf;
3203 using ::wcrtomb;
3204 using ::wcscat;
3205 using ::wcschr;
3206 using ::wcscmp;
3207 using ::wcscoll;
3208 using ::wcscpy;
3209 using ::wcscspn;
3210 using ::wcsftime;
3211 using ::wcslen;
3212 using ::wcsncat;
3213 using ::wcsncmp;
3214 using ::wcsncpy;
3215 using ::wcspbrk;
3216 using ::wcsrchr;
3217 using ::wcsrtombs;
3218 using ::wcsspn;
3219 using ::wcsstr;
3220 using ::wcstod;
3221 using ::wcstok;
3222 using ::wcstol;
3223 using ::wcstoul;
3224 using ::wcsxfrm;
3225 using ::wctob;
3226 using ::wmemchr;
3227 using ::wmemcmp;
3228 using ::wmemcpy;
3229 using ::wmemmove;
3230 using ::wmemset;
3231 using ::wprintf;
3232 using ::wscanf;
3233 }
3234 ],[],[], [enable_wchar_t=no])
3235 else
3236 enable_wchar_t=no
3237 fi
3239 AC_LANG_RESTORE
3240 fi
3242 if test x"$enable_wchar_t" = x"yes"; then
3243 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
3244 [Define if code specialized for wchar_t should be used.])
3245 fi
3247 AC_MSG_CHECKING([for enabled wchar_t specializations])
3248 AC_MSG_RESULT([$enable_wchar_t])
3249 ])
3252 dnl
3253 dnl Check to see if building and using a C++ precompiled header can be done.
3254 dnl
3255 dnl --enable-libstdcxx-pch=yes
3256 dnl default, this shows intent to use stdc++.h.gch If it looks like it
3257 dnl may work, after some light-hearted attempts to puzzle out compiler
3258 dnl support, flip bits on in include/Makefile.am
3259 dnl
3260 dnl --disable-libstdcxx-pch
3261 dnl turns off attempts to use or build stdc++.h.gch.
3262 dnl
3263 dnl Substs:
3264 dnl glibcxx_PCHFLAGS
3265 dnl
3266 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
3267 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
3268 if test $enable_libstdcxx_pch = yes; then
3269 AC_CACHE_CHECK([for compiler with PCH support],
3270 [glibcxx_cv_prog_CXX_pch],
3271 [ac_save_CXXFLAGS="$CXXFLAGS"
3272 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3273 AC_LANG_SAVE
3274 AC_LANG_CPLUSPLUS
3275 echo '#include <math.h>' > conftest.h
3276 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
3277 -o conftest.h.gch 1>&5 2>&1 &&
3278 echo '#error "pch failed"' > conftest.h &&
3279 echo '#include "conftest.h"' > conftest.cc &&
3280 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3281 then
3282 glibcxx_cv_prog_CXX_pch=yes
3283 else
3284 glibcxx_cv_prog_CXX_pch=no
3285 fi
3286 rm -f conftest*
3287 CXXFLAGS=$ac_save_CXXFLAGS
3288 AC_LANG_RESTORE
3289 ])
3290 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
3291 fi
3293 AC_MSG_CHECKING([for enabled PCH])
3294 AC_MSG_RESULT([$enable_libstdcxx_pch])
3296 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
3297 if test $enable_libstdcxx_pch = yes; then
3298 glibcxx_PCHFLAGS="-include bits/stdc++.h"
3299 else
3300 glibcxx_PCHFLAGS=""
3301 fi
3302 AC_SUBST(glibcxx_PCHFLAGS)
3303 ])
3306 dnl
3307 dnl Check for atomic builtins.
3308 dnl See:
3309 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
3310 dnl
3311 dnl This checks to see if the host supports the compiler-generated
3312 dnl builtins for atomic operations for various integral sizes. Note, this
3313 dnl is intended to be an all-or-nothing switch, so all the atomic operations
3314 dnl that are used should be checked.
3315 dnl
3316 dnl Note:
3317 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
3318 dnl
3319 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
3320 AC_LANG_SAVE
3321 AC_LANG_CPLUSPLUS
3322 old_CXXFLAGS="$CXXFLAGS"
3324 # Do link tests if possible, instead asm tests, limited to some platforms
3325 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3326 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3327 atomic_builtins_link_tests=no
3328 if test x$gcc_no_link != xyes; then
3329 # Can do link tests. Limit to some tested platforms
3330 case "$host" in
3331 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3332 atomic_builtins_link_tests=yes
3333 ;;
3334 esac
3335 fi
3337 if test x$atomic_builtins_link_tests = xyes; then
3339 # Do link tests.
3341 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3343 AC_MSG_CHECKING([for atomic builtins for bool])
3344 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
3345 AC_TRY_LINK(
3346 [ ],
3347 [typedef bool atomic_type;
3348 atomic_type c1;
3349 atomic_type c2;
3350 atomic_type c3(0);
3351 // N.B. __atomic_fetch_add is not supported for bool.
3352 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3353 __ATOMIC_RELAXED);
3354 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3355 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3356 ],
3357 [glibcxx_cv_atomic_bool=yes],
3358 [glibcxx_cv_atomic_bool=no])
3359 ])
3360 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3362 AC_MSG_CHECKING([for atomic builtins for short])
3363 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
3364 AC_TRY_LINK(
3365 [ ],
3366 [typedef short atomic_type;
3367 atomic_type c1;
3368 atomic_type c2;
3369 atomic_type c3(0);
3370 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3371 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3372 __ATOMIC_RELAXED);
3373 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3374 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3375 ],
3376 [glibcxx_cv_atomic_short=yes],
3377 [glibcxx_cv_atomic_short=no])
3378 ])
3379 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3381 AC_MSG_CHECKING([for atomic builtins for int])
3382 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
3383 AC_TRY_LINK(
3384 [ ],
3385 [typedef int atomic_type;
3386 atomic_type c1;
3387 atomic_type c2;
3388 atomic_type c3(0);
3389 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3390 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3391 __ATOMIC_RELAXED);
3392 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3393 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3394 ],
3395 [glibcxx_cv_atomic_int=yes],
3396 [glibcxx_cv_atomic_int=no])
3397 ])
3398 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3400 AC_MSG_CHECKING([for atomic builtins for long long])
3401 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
3402 AC_TRY_LINK(
3403 [ ],
3404 [typedef long long atomic_type;
3405 atomic_type c1;
3406 atomic_type c2;
3407 atomic_type c3(0);
3408 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3409 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3410 __ATOMIC_RELAXED);
3411 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3412 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3413 ],
3414 [glibcxx_cv_atomic_long_long=yes],
3415 [glibcxx_cv_atomic_long_long=no])
3416 ])
3417 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3419 else
3421 # Do asm tests.
3423 # Compile unoptimized.
3424 CXXFLAGS='-O0 -S'
3426 # Fake what AC_TRY_COMPILE does.
3428 cat > conftest.$ac_ext << EOF
3429 [#]line __oline__ "configure"
3430 int main()
3431 {
3432 typedef bool atomic_type;
3433 atomic_type c1;
3434 atomic_type c2;
3435 atomic_type c3(0);
3436 // N.B. __atomic_fetch_add is not supported for bool.
3437 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3438 __ATOMIC_RELAXED);
3439 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3440 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3442 return 0;
3443 }
3444 EOF
3446 AC_MSG_CHECKING([for atomic builtins for bool])
3447 if AC_TRY_EVAL(ac_compile); then
3448 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3449 glibcxx_cv_atomic_bool=no
3450 else
3451 glibcxx_cv_atomic_bool=yes
3452 fi
3453 fi
3454 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3455 rm -f conftest*
3457 cat > conftest.$ac_ext << EOF
3458 [#]line __oline__ "configure"
3459 int main()
3460 {
3461 typedef short atomic_type;
3462 atomic_type c1;
3463 atomic_type c2;
3464 atomic_type c3(0);
3465 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3466 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3467 __ATOMIC_RELAXED);
3468 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3469 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3471 return 0;
3472 }
3473 EOF
3475 AC_MSG_CHECKING([for atomic builtins for short])
3476 if AC_TRY_EVAL(ac_compile); then
3477 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3478 glibcxx_cv_atomic_short=no
3479 else
3480 glibcxx_cv_atomic_short=yes
3481 fi
3482 fi
3483 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3484 rm -f conftest*
3486 cat > conftest.$ac_ext << EOF
3487 [#]line __oline__ "configure"
3488 int main()
3489 {
3490 // NB: _Atomic_word not necessarily int.
3491 typedef int atomic_type;
3492 atomic_type c1;
3493 atomic_type c2;
3494 atomic_type c3(0);
3495 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3496 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3497 __ATOMIC_RELAXED);
3498 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3499 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3501 return 0;
3502 }
3503 EOF
3505 AC_MSG_CHECKING([for atomic builtins for int])
3506 if AC_TRY_EVAL(ac_compile); then
3507 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3508 glibcxx_cv_atomic_int=no
3509 else
3510 glibcxx_cv_atomic_int=yes
3511 fi
3512 fi
3513 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3514 rm -f conftest*
3516 cat > conftest.$ac_ext << EOF
3517 [#]line __oline__ "configure"
3518 int main()
3519 {
3520 typedef long long atomic_type;
3521 atomic_type c1;
3522 atomic_type c2;
3523 atomic_type c3(0);
3524 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3525 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
3526 __ATOMIC_RELAXED);
3527 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3528 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3530 return 0;
3531 }
3532 EOF
3534 AC_MSG_CHECKING([for atomic builtins for long long])
3535 if AC_TRY_EVAL(ac_compile); then
3536 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
3537 glibcxx_cv_atomic_long_long=no
3538 else
3539 glibcxx_cv_atomic_long_long=yes
3540 fi
3541 fi
3542 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3543 rm -f conftest*
3545 fi
3547 CXXFLAGS="$old_CXXFLAGS"
3548 AC_LANG_RESTORE
3550 # Set atomicity_dir to builtins if all but the long long test above passes,
3551 # or if the builtins were already chosen (e.g. by configure.host).
3552 if { test "$glibcxx_cv_atomic_bool" = yes \
3553 && test "$glibcxx_cv_atomic_short" = yes \
3554 && test "$glibcxx_cv_atomic_int" = yes; } \
3555 || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then
3556 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3557 [Define if the compiler supports C++11 atomics.])
3558 atomicity_dir=cpu/generic/atomicity_builtins
3559 fi
3561 # If still generic, set to mutex.
3562 if test $atomicity_dir = "cpu/generic" ; then
3563 atomicity_dir=cpu/generic/atomicity_mutex
3564 AC_MSG_WARN([No native atomic operations are provided for this platform.])
3565 if test "x$target_thread_file" = xsingle; then
3566 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3567 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
3568 else
3569 AC_MSG_WARN([They will be faked using a mutex.])
3570 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
3571 fi
3572 fi
3574 ])
3577 dnl
3578 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3579 dnl
3580 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3581 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3582 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3583 dnl Where DEFAULT is 'yes'.
3584 dnl
3585 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3586 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3588 if test x$enable_libstdcxx_visibility = xyes ; then
3589 dnl all hail libgfortran
3590 dnl Check whether the target supports hidden visibility.
3591 AC_CACHE_CHECK([whether the target supports hidden visibility],
3592 glibcxx_cv_have_attribute_visibility, [
3593 save_CFLAGS="$CFLAGS"
3594 CFLAGS="$CFLAGS -Werror"
3595 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3596 [], glibcxx_cv_have_attribute_visibility=yes,
3597 glibcxx_cv_have_attribute_visibility=no)
3598 CFLAGS="$save_CFLAGS"])
3599 if test $glibcxx_cv_have_attribute_visibility = no; then
3600 enable_libstdcxx_visibility=no
3601 fi
3602 fi
3604 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3605 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3606 ])
3609 dnl
3610 dnl Add version tags to symbols in shared library (or not), additionally
3611 dnl marking other symbols as private/local (or not).
3612 dnl
3613 dnl Sets libtool_VERSION, and determines shared library SONAME.
3614 dnl
3615 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3616 dnl
3617 dnl --enable-symvers=style adds a version script to the linker call when
3618 dnl creating the shared library. The choice of version script is
3619 dnl controlled by 'style'.
3620 dnl --disable-symvers does not.
3621 dnl
3622 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3623 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3624 dnl choose a default style based on linker characteristics. Passing
3625 dnl 'no' disables versioning.
3626 dnl
3627 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3629 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3630 [enables symbol versioning of the shared library],
3631 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3633 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3634 # don't know enough about $LD to do tricks...
3635 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3636 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3637 # with extern "C++" in version scripts.
3638 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3640 # Turn a 'yes' into a suitable default.
3641 if test x$enable_symvers = xyes ; then
3642 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3643 enable_symvers=no
3644 else
3645 if test $with_gnu_ld = yes ; then
3646 case ${target_os} in
3647 hpux*)
3648 enable_symvers=no ;;
3649 *)
3650 enable_symvers=gnu ;;
3651 esac
3652 else
3653 case ${target_os} in
3654 darwin*)
3655 enable_symvers=darwin ;;
3656 # Sun symbol versioning exists since Solaris 2.5.
3657 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3658 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3659 # version scripts, so disable symbol versioning if none can be
3660 # found.
3661 if test -z "$ac_cv_path_CXXFILT"; then
3662 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3663 AC_MSG_WARN([=== no GNU c++filt could be found.])
3664 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3665 enable_symvers=no
3666 else
3667 enable_symvers=sun
3668 fi
3669 ;;
3670 *)
3671 enable_symvers=no ;;
3672 esac
3673 fi
3674 fi
3675 fi
3677 # Check to see if 'darwin' or 'darwin-export' can win.
3678 if test x$enable_symvers = xdarwin-export ; then
3679 enable_symvers=darwin
3680 fi
3682 # Check if 'sun' was requested on non-Solaris 2 platforms.
3683 if test x$enable_symvers = xsun ; then
3684 case ${target_os} in
3685 solaris2*)
3686 # All fine.
3687 ;;
3688 *)
3689 # Unlikely to work.
3690 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3691 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3692 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3693 enable_symvers=no
3694 ;;
3695 esac
3696 fi
3698 # Check to see if 'gnu' can win.
3699 if test $enable_symvers = gnu ||
3700 test $enable_symvers = gnu-versioned-namespace ||
3701 test $enable_symvers = sun; then
3702 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3703 AC_MSG_CHECKING([for shared libgcc])
3704 ac_save_CFLAGS="$CFLAGS"
3705 CFLAGS=' -lgcc_s'
3706 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3707 CFLAGS="$ac_save_CFLAGS"
3708 if test $glibcxx_shared_libgcc = no; then
3709 cat > conftest.c <<EOF
3710 int main (void) { return 0; }
3711 EOF
3712 changequote(,)dnl
3713 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3714 -shared -shared-libgcc -o conftest.so \
3715 conftest.c -v 2>&1 >/dev/null \
3716 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3717 changequote([,])dnl
3718 rm -f conftest.c conftest.so
3719 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3720 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3721 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3722 CFLAGS="$ac_save_CFLAGS"
3723 fi
3724 fi
3725 AC_MSG_RESULT($glibcxx_shared_libgcc)
3727 # For GNU ld, we need at least this version. The format is described in
3728 # GLIBCXX_CHECK_LINKER_FEATURES above.
3729 glibcxx_min_gnu_ld_version=21400
3731 # If no shared libgcc, can't win.
3732 if test $glibcxx_shared_libgcc != yes; then
3733 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3734 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3735 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3736 enable_symvers=no
3737 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3738 : All interesting versions of Sun ld support sun style symbol versioning.
3739 elif test $with_gnu_ld != yes ; then
3740 # just fail for now
3741 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3742 AC_MSG_WARN([=== you are not using the GNU linker.])
3743 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3744 enable_symvers=no
3745 elif test $glibcxx_ld_is_gold = yes ; then
3746 : All versions of gold support symbol versioning.
3747 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3748 # The right tools, the right setup, but too old. Fallbacks?
3749 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3750 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3751 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3752 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3753 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3754 enable_symvers=no
3755 fi
3756 fi
3758 # For libtool versioning info, format is CURRENT:REVISION:AGE
3759 libtool_VERSION=6:23:0
3761 # Everything parsed; figure out what files and settings to use.
3762 case $enable_symvers in
3763 no)
3764 SYMVER_FILE=config/abi/pre/none.ver
3765 ;;
3766 gnu)
3767 SYMVER_FILE=config/abi/pre/gnu.ver
3768 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3769 [Define to use GNU versioning in the shared library.])
3770 ;;
3771 gnu-versioned-namespace)
3772 libtool_VERSION=7:0:0
3773 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3774 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3775 [Define to use GNU namespace versioning in the shared library.])
3776 ;;
3777 darwin)
3778 SYMVER_FILE=config/abi/pre/gnu.ver
3779 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3780 [Define to use darwin versioning in the shared library.])
3781 ;;
3782 sun)
3783 SYMVER_FILE=config/abi/pre/gnu.ver
3784 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3785 [Define to use Sun versioning in the shared library.])
3786 ;;
3787 esac
3789 if test x$enable_symvers != xno ; then
3790 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3791 [Define to use symbol versioning in the shared library.])
3792 fi
3794 AC_CACHE_CHECK([whether the target supports .symver directive],
3795 glibcxx_cv_have_as_symver_directive, [
3796 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3797 [], glibcxx_cv_have_as_symver_directive=yes,
3798 glibcxx_cv_have_as_symver_directive=no)])
3799 if test $glibcxx_cv_have_as_symver_directive = yes; then
3800 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3801 [Define to 1 if the target assembler supports .symver directive.])
3802 fi
3804 AC_SUBST(SYMVER_FILE)
3805 AC_SUBST(port_specific_symbol_files)
3806 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3807 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3808 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3809 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3810 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3811 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3813 if test $enable_symvers != no ; then
3814 case ${target_os} in
3815 # The Solaris 2 runtime linker doesn't support the GNU extension of
3816 # binding the same symbol to different versions
3817 solaris2*)
3818 ;;
3819 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3820 *)
3821 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3822 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3823 ;;
3824 esac
3825 fi
3827 # Now, set up compatibility support, if any.
3828 # In addition, need this to deal with std::size_t mangling in
3829 # src/compatibility.cc. In a perfect world, could use
3830 # typeid(std::size_t).name()[0] to do direct substitution.
3831 AC_MSG_CHECKING([for size_t as unsigned int])
3832 ac_save_CFLAGS="$CFLAGS"
3833 CFLAGS="-Werror"
3834 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3835 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3836 CFLAGS=$ac_save_CFLAGS
3837 if test "$glibcxx_size_t_is_i" = yes; then
3838 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3839 fi
3840 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3842 AC_MSG_CHECKING([for ptrdiff_t as int])
3843 ac_save_CFLAGS="$CFLAGS"
3844 CFLAGS="-Werror"
3845 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3846 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3847 CFLAGS=$ac_save_CFLAGS
3848 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3849 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3850 fi
3851 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3852 ])
3855 dnl
3856 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3857 dnl We must stage the required headers so that they will be installed
3858 dnl with the library (unlike libgcc, the STL implementation is provided
3859 dnl solely within headers). Since we must not inject random user-space
3860 dnl macro names into user-provided C++ code, we first stage into <file>-in
3861 dnl and process to <file> with an output command. The reason for a two-
3862 dnl stage process here is to correctly handle $srcdir!=$objdir without
3863 dnl having to write complex code (the sed commands to clean the macro
3864 dnl namespace are complex and fragile enough as it is). We must also
3865 dnl add a relative path so that -I- is supported properly.
3866 dnl
3867 dnl Substs:
3868 dnl thread_header
3869 dnl
3870 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3871 AC_MSG_CHECKING([for thread model used by GCC])
3872 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3873 AC_MSG_RESULT([$target_thread_file])
3874 GCC_AC_THREAD_HEADER([$target_thread_file])
3875 ])
3878 dnl
3879 dnl Check if gthread implementation defines the types and functions
3880 dnl required by the c++0x thread library. Conforming gthread
3881 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3882 dnl
3883 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3884 dnl
3885 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3886 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3888 if test x$enable_libstdcxx_threads = xauto ||
3889 test x$enable_libstdcxx_threads = xyes; then
3891 AC_LANG_SAVE
3892 AC_LANG_CPLUSPLUS
3894 ac_save_CXXFLAGS="$CXXFLAGS"
3895 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3896 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3898 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3899 case $target_thread_file in
3900 posix)
3901 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3902 esac
3904 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3906 AC_TRY_COMPILE([#include <unistd.h>],
3907 [
3908 // In case of POSIX threads check _POSIX_TIMEOUTS.
3909 #if (defined(_PTHREADS) \
3910 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3911 #error
3912 #endif
3913 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3915 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3916 [Define to 1 if mutex_timedlock is available.])
3918 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3919 else res_mutex_timedlock=no ; fi
3920 AC_MSG_RESULT([$res_mutex_timedlock])
3922 AC_MSG_CHECKING([for gthreads library])
3924 AC_TRY_COMPILE([#include "gthr.h"],
3925 [
3926 #ifndef __GTHREADS_CXX0X
3927 #error
3928 #endif
3929 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3930 else
3931 ac_has_gthreads=no
3932 fi
3934 AC_MSG_RESULT([$ac_has_gthreads])
3936 if test x"$ac_has_gthreads" = x"yes"; then
3937 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3938 [Define if gthreads library is available.])
3940 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
3941 AC_CHECK_TYPE([pthread_rwlock_t],
3942 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
3943 [Define if POSIX read/write locks are available in <gthr.h>.])],
3944 [],
3945 [#include "gthr.h"])
3946 fi
3948 CXXFLAGS="$ac_save_CXXFLAGS"
3949 AC_LANG_RESTORE
3950 ])
3953 # Check whether LC_MESSAGES is available in <locale.h>.
3954 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3955 #
3956 # This file file be copied and used freely without restrictions. It can
3957 # be used in projects which are not available under the GNU Public License
3958 # but which still want to provide support for the GNU gettext functionality.
3959 # Please note that the actual code is *not* freely available.
3960 AC_DEFUN([AC_LC_MESSAGES], [
3961 AC_CHECK_HEADER(locale.h, [
3962 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3963 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3964 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3965 if test $ac_cv_val_LC_MESSAGES = yes; then
3966 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3967 [Define if LC_MESSAGES is available in <locale.h>.])
3968 fi
3969 ])
3970 ])
3972 dnl
3973 dnl Check whether rdrand is supported in the assembler.
3974 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3975 AC_MSG_CHECKING([for rdrand support in assembler])
3976 AC_CACHE_VAL(ac_cv_x86_rdrand, [
3977 ac_cv_x86_rdrand=no
3978 case "$target" in
3979 i?86-*-* | \
3980 x86_64-*-*)
3981 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3982 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3983 esac
3984 ])
3985 if test $ac_cv_x86_rdrand = yes; then
3986 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3987 [ Defined if as can handle rdrand. ])
3988 fi
3989 AC_MSG_RESULT($ac_cv_x86_rdrand)
3990 ])
3992 dnl
3993 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3994 dnl
3995 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3997 AC_LANG_SAVE
3998 AC_LANG_CPLUSPLUS
3999 ac_save_CXXFLAGS="$CXXFLAGS"
4000 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4002 AC_MSG_CHECKING([for get_nprocs])
4003 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
4004 GCC_TRY_COMPILE_OR_LINK(
4005 [#include <sys/sysinfo.h>],
4006 [int n = get_nprocs();],
4007 [glibcxx_cv_GET_NPROCS=yes],
4008 [glibcxx_cv_GET_NPROCS=no])
4009 ])
4010 if test $glibcxx_cv_GET_NPROCS = yes; then
4011 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
4012 fi
4013 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
4015 CXXFLAGS="$ac_save_CXXFLAGS"
4016 AC_LANG_RESTORE
4017 ])
4019 dnl
4020 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
4021 dnl
4022 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
4024 AC_LANG_SAVE
4025 AC_LANG_CPLUSPLUS
4026 ac_save_CXXFLAGS="$CXXFLAGS"
4027 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4029 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
4030 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
4031 GCC_TRY_COMPILE_OR_LINK(
4032 [#include <unistd.h>],
4033 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
4034 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
4035 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
4036 ])
4037 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
4038 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
4039 fi
4040 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
4042 CXXFLAGS="$ac_save_CXXFLAGS"
4043 AC_LANG_RESTORE
4044 ])
4046 dnl
4047 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
4048 dnl
4049 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
4051 AC_LANG_SAVE
4052 AC_LANG_CPLUSPLUS
4053 ac_save_CXXFLAGS="$CXXFLAGS"
4054 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4056 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
4057 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
4058 GCC_TRY_COMPILE_OR_LINK(
4059 [#include <unistd.h>],
4060 [int n = sysconf(_SC_NPROC_ONLN);],
4061 [glibcxx_cv_SC_NPROC_ONLN=yes],
4062 [glibcxx_cv_SC_NPROC_ONLN=no])
4063 ])
4064 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
4065 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
4066 fi
4067 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
4069 CXXFLAGS="$ac_save_CXXFLAGS"
4070 AC_LANG_RESTORE
4071 ])
4073 dnl
4074 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
4075 dnl
4076 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
4078 AC_LANG_SAVE
4079 AC_LANG_CPLUSPLUS
4080 ac_save_CXXFLAGS="$CXXFLAGS"
4081 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4083 AC_MSG_CHECKING([for pthreads_num_processors_np])
4084 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
4085 GCC_TRY_COMPILE_OR_LINK(
4086 [#include <pthread.h>],
4087 [int n = pthread_num_processors_np();],
4088 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
4089 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
4090 ])
4091 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
4092 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
4093 fi
4094 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
4096 CXXFLAGS="$ac_save_CXXFLAGS"
4097 AC_LANG_RESTORE
4098 ])
4100 dnl
4101 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
4102 dnl
4103 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
4105 AC_LANG_SAVE
4106 AC_LANG_CPLUSPLUS
4107 ac_save_CXXFLAGS="$CXXFLAGS"
4108 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4110 AC_MSG_CHECKING([for hw.ncpu sysctl])
4111 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
4112 GCC_TRY_COMPILE_OR_LINK(
4113 [
4114 #include <stddef.h>
4115 #include <sys/sysctl.h>
4116 ],
4117 [
4118 int count;
4119 size_t size = sizeof(count);
4120 int mib[] = { CTL_HW, HW_NCPU };
4121 sysctl(mib, 2, &count, &size, NULL, 0);
4122 ],
4123 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
4124 [glibcxx_cv_SYSCTL_HW_NCPU=no])
4125 ])
4126 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
4127 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
4128 fi
4129 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
4131 CXXFLAGS="$ac_save_CXXFLAGS"
4132 AC_LANG_RESTORE
4133 ])
4135 dnl
4136 dnl Check to see if python pretty printing can be activated.
4137 dnl
4138 dnl --with-python-dir=dir
4139 dnl installs directory into $prefix/dir
4140 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4142 AC_MSG_CHECKING([for custom python install directory])
4143 AC_ARG_WITH([python-dir],
4144 AS_HELP_STRING([--with-python-dir],
4145 [the location to install Python modules. This path is relative starting from the prefix.]),
4146 [with_python_dir=$withval], [with_python_dir="no"])
4147 AC_MSG_RESULT(${with_python_dir})
4149 # Needed for installing Python modules during make install.
4150 python_mod_dir="${with_python_dir}"
4151 AC_SUBST(python_mod_dir)
4152 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4153 ])
4155 dnl
4156 dnl Check to see if -Werror is disabled.
4157 dnl
4158 dnl --enable-werror/--disable-werror
4159 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4160 AC_MSG_CHECKING([for -Werror])
4161 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4162 AC_MSG_RESULT($enable_werror)
4163 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4164 ])
4166 dnl
4167 dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4168 dnl and define _GLIBCXX_USE_TMPNAM.
4169 dnl
4170 AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4171 dnl
4172 AC_LANG_SAVE
4173 AC_LANG_CPLUSPLUS
4174 ac_save_CXXFLAGS="$CXXFLAGS"
4175 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4176 dnl
4177 AC_MSG_CHECKING([for tmpnam])
4178 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
4179 GCC_TRY_COMPILE_OR_LINK(
4180 [#include <stdio.h>],
4181 [char *tmp = tmpnam(NULL);],
4182 [glibcxx_cv_TMPNAM=yes],
4183 [glibcxx_cv_TMPNAM=no])
4184 ])
4185 if test $glibcxx_cv_TMPNAM = yes; then
4186 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4187 fi
4188 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
4189 dnl
4190 CXXFLAGS="$ac_save_CXXFLAGS"
4191 AC_LANG_RESTORE
4192 ])
4194 dnl
4195 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4196 dnl Some versions of sdt.h were not compatible with C++11.
4197 dnl
4198 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
4199 AC_MSG_CHECKING([for suitable sys/sdt.h])
4200 # Note that this test has to be run with the C language.
4201 # Otherwise, sdt.h will try to include some headers from
4202 # libstdc++ itself.
4203 AC_LANG_SAVE
4204 AC_LANG_C
4205 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
4206 # Because we have to run the test in C, we use grep rather
4207 # than the compiler to check for the bug. The bug is that
4208 # were strings without trailing whitespace, causing g++
4209 # to look for operator"". The pattern searches for the fixed
4210 # output.
4211 AC_EGREP_CPP([ \",\" ], [
4212 #include <sys/sdt.h>
4213 int f() { STAP_PROBE(hi, bob); }
4214 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4215 ])
4216 AC_LANG_RESTORE
4217 if test $glibcxx_cv_sys_sdt_h = yes; then
4218 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4219 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4220 fi
4221 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
4222 ])
4224 dnl
4225 dnl Control whether the library should define symbols for old and new ABIs.
4226 dnl This affects definitions of strings, stringstreams and locale facets.
4227 dnl
4228 dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
4229 dnl
4230 dnl Defines:
4231 dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
4232 dnl
4233 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4234 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
4235 if test x$enable_symvers = xgnu-versioned-namespace; then
4236 # gnu-versioned-namespace is incompatible with the dual ABI.
4237 enable_libstdcxx_dual_abi="no"
4238 fi
4239 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4240 AC_MSG_NOTICE([dual ABI is disabled])
4241 default_libstdcxx_abi="gcc4-compatible"
4242 fi
4243 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
4244 ])
4246 dnl
4247 dnl Check to see which ABI should be enabled by default.
4248 dnl
4249 dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
4250 dnl
4251 dnl Defines:
4252 dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4253 dnl
4254 AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4255 if test x$enable_libstdcxx_dual_abi = xyes; then
4256 AC_MSG_CHECKING([for default std::string ABI to use])
4257 AC_ARG_WITH([default-libstdcxx-abi],
4258 AS_HELP_STRING([--with-default-libstdcxx-abi],
4259 [set the std::string ABI to use by default]),
4260 [case "$withval" in
4261 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4262 new|cxx11) default_libstdcxx_abi="new" ;;
4263 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4264 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4265 esac
4266 ],
4267 [default_libstdcxx_abi="new"])
4268 AC_MSG_RESULT(${default_libstdcxx_abi})
4269 fi
4270 if test $default_libstdcxx_abi = "new"; then
4271 glibcxx_cxx11_abi=1
4272 glibcxx_cxx98_abi=0
4273 else
4274 glibcxx_cxx11_abi=0
4275 glibcxx_cxx98_abi=1
4276 fi
4277 AC_SUBST(glibcxx_cxx98_abi)
4278 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4279 ])
4281 dnl
4282 dnl Check to see whether to build libstdc++fs.a
4283 dnl
4284 dnl --enable-libstdcxx-filesystem-ts
4285 dnl
4286 AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4287 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4288 [turns on ISO/IEC TS 18822 support],
4289 [permit yes|no|auto])
4291 AC_MSG_CHECKING([whether to build Filesystem TS support])
4292 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4293 enable_libstdcxx_filesystem_ts=no
4294 fi
4295 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4296 case "${target_os}" in
4297 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4298 enable_libstdcxx_filesystem_ts=yes
4299 ;;
4300 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
4301 enable_libstdcxx_filesystem_ts=yes
4302 ;;
4303 solaris*)
4304 enable_libstdcxx_filesystem_ts=yes
4305 ;;
4306 *)
4307 enable_libstdcxx_filesystem_ts=no
4308 ;;
4309 esac
4310 fi
4311 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4312 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4313 ])
4315 dnl
4316 dnl Check whether the library calls required by the Filesystem TS are present
4317 dnl and define _GLIBCXX_USE_REALPATH and _GLIBCXX_USE_UTIMENSAT.
4318 dnl
4319 AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4320 dnl
4321 AC_LANG_SAVE
4322 AC_LANG_CPLUSPLUS
4323 ac_save_CXXFLAGS="$CXXFLAGS"
4324 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4325 dnl
4326 AC_MSG_CHECKING([for struct dirent.d_type])
4327 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
4328 GCC_TRY_COMPILE_OR_LINK(
4329 [#include <dirent.h>],
4330 [
4331 struct dirent d;
4332 if (sizeof d.d_type) return 0;
4333 ],
4334 [glibcxx_cv_dirent_d_type=yes],
4335 [glibcxx_cv_dirent_d_type=no])
4336 ])
4337 if test $glibcxx_cv_dirent_d_type = yes; then
4338 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
4339 fi
4340 AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
4341 dnl
4342 AC_MSG_CHECKING([for realpath])
4343 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
4344 GCC_TRY_COMPILE_OR_LINK(
4345 [
4346 #include <limits.h>
4347 #include <stdlib.h>
4348 #include <unistd.h>
4349 ],
4350 [
4351 #if _XOPEN_VERSION < 500
4352 #error
4353 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4354 char *tmp = realpath((const char*)NULL, (char*)NULL);
4355 #else
4356 #error
4357 #endif
4358 ],
4359 [glibcxx_cv_realpath=yes],
4360 [glibcxx_cv_realpath=no])
4361 ])
4362 if test $glibcxx_cv_realpath = yes; then
4363 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
4364 fi
4365 AC_MSG_RESULT($glibcxx_cv_realpath)
4366 dnl
4367 AC_MSG_CHECKING([for utimensat])
4368 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl
4369 GCC_TRY_COMPILE_OR_LINK(
4370 [
4371 #include <fcntl.h>
4372 #include <sys/stat.h>
4373 ],
4374 [
4375 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4376 int i = utimensat(AT_FDCWD, "path", ts, 0);
4377 ],
4378 [glibcxx_cv_utimensat=yes],
4379 [glibcxx_cv_utimensat=no])
4380 ])
4381 if test $glibcxx_cv_utimensat = yes; then
4382 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4383 fi
4384 AC_MSG_RESULT($glibcxx_cv_utimensat)
4385 dnl
4386 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec])
4387 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl
4388 GCC_TRY_COMPILE_OR_LINK(
4389 [ #include <sys/stat.h> ],
4390 [
4391 struct stat st;
4392 return st.st_mtim.tv_nsec;
4393 ],
4394 [glibcxx_cv_st_mtim=yes],
4395 [glibcxx_cv_st_mtim=no])
4396 ])
4397 if test $glibcxx_cv_st_mtim = yes; then
4398 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4399 fi
4400 AC_MSG_RESULT($glibcxx_cv_st_mtim)
4401 dnl
4402 AC_MSG_CHECKING([for fchmod])
4403 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl
4404 GCC_TRY_COMPILE_OR_LINK(
4405 [#include <sys/stat.h>],
4406 [fchmod(1, S_IWUSR);],
4407 [glibcxx_cv_fchmod=yes],
4408 [glibcxx_cv_fchmod=no])
4409 ])
4410 if test $glibcxx_cv_fchmod = yes; then
4411 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4412 fi
4413 AC_MSG_RESULT($glibcxx_cv_fchmod)
4414 dnl
4415 AC_MSG_CHECKING([for fchmodat])
4416 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl
4417 GCC_TRY_COMPILE_OR_LINK(
4418 [
4419 #include <fcntl.h>
4420 #include <sys/stat.h>
4421 ],
4422 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4423 [glibcxx_cv_fchmodat=yes],
4424 [glibcxx_cv_fchmodat=no])
4425 ])
4426 if test $glibcxx_cv_fchmodat = yes; then
4427 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4428 fi
4429 AC_MSG_RESULT($glibcxx_cv_fchmodat)
4430 dnl
4431 AC_MSG_CHECKING([for sendfile that can copy files])
4432 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl
4433 case "${target_os}" in
4434 gnu* | linux* | solaris*)
4435 GCC_TRY_COMPILE_OR_LINK(
4436 [#include <sys/sendfile.h>],
4437 [sendfile(1, 2, (off_t*)0, sizeof 1);],
4438 [glibcxx_cv_sendfile=yes],
4439 [glibcxx_cv_sendfile=no])
4440 ;;
4441 *)
4442 glibcxx_cv_sendfile=no
4443 ;;
4444 esac
4445 ])
4446 if test $glibcxx_cv_sendfile = yes; then
4447 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.])
4448 fi
4449 AC_MSG_RESULT($glibcxx_cv_sendfile)
4450 dnl
4451 CXXFLAGS="$ac_save_CXXFLAGS"
4452 AC_LANG_RESTORE
4453 ])
4455 dnl
4456 dnl Check how size_t is mangled. Copied from libitm.
4457 dnl
4458 AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [
4459 AC_CACHE_CHECK([how size_t is mangled],
4460 glibcxx_cv_size_t_mangling, [
4461 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
4462 [glibcxx_cv_size_t_mangling=m], [
4463 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
4464 [glibcxx_cv_size_t_mangling=j], [
4465 AC_TRY_COMPILE([],
4466 [extern __SIZE_TYPE__ x; extern unsigned long long x;],
4467 [glibcxx_cv_size_t_mangling=y], [
4468 AC_TRY_COMPILE([],
4469 [extern __SIZE_TYPE__ x; extern unsigned short x;],
4470 [glibcxx_cv_size_t_mangling=t],
4471 [glibcxx_cv_size_t_mangling=x])
4472 ])
4473 ])
4474 ])
4475 ])
4476 if test $glibcxx_cv_size_t_mangling = x; then
4477 AC_MSG_ERROR([Unknown underlying type for size_t])
4478 fi
4479 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling],
4480 [Define to the letter to which size_t is mangled.])
4481 ])
4483 # Macros from the top-level gcc directory.
4484 m4_include([../config/gc++filt.m4])
4485 m4_include([../config/tls.m4])
4486 m4_include([../config/gthr.m4])