| blob | 619fff02bf708685fe62b7bc6439a865a15cb7cd |
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 $host.
32 dnl
33 dnl Sets:
34 dnl SUBDIRS
35 dnl Substs:
36 dnl glibcxx_builddir (absolute path)
37 dnl glibcxx_srcdir (absolute path)
38 dnl toplevel_builddir (absolute path)
39 dnl toplevel_srcdir (absolute path)
40 dnl with_cross_host
41 dnl with_newlib
42 dnl with_target_subdir
43 dnl plus
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
47 dnl
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libsupc++ python src src/c++98 src/c++11 doc po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
59 case $srcdir in
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
62 esac
63 toplevel_builddir=${glibcxx_builddir}/..
64 toplevel_srcdir=${glibcxx_srcdir}/..
65 AC_SUBST(glibcxx_builddir)
66 AC_SUBST(glibcxx_srcdir)
67 AC_SUBST(toplevel_builddir)
68 AC_SUBST(toplevel_srcdir)
70 # We use these options to decide which functions to include. They are
71 # set from the top level.
72 AC_ARG_WITH([target-subdir],
73 AC_HELP_STRING([--with-target-subdir=SUBDIR],
74 [configuring in a subdirectory]))
76 AC_ARG_WITH([cross-host],
77 AC_HELP_STRING([--with-cross-host=HOST],
78 [configuring with a cross compiler]))
80 AC_ARG_WITH([newlib],
81 AC_HELP_STRING([--with-newlib],
82 [assume newlib as a system C library]))
84 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
85 # available). Uncomment the next line to force a particular method.
86 AC_PROG_LN_S
87 #LN_S='cp -p'
89 AC_CHECK_TOOL(AS, as)
90 AC_CHECK_TOOL(AR, ar)
91 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
93 AM_MAINTAINER_MODE
95 # Set up safe default values for all subsequent AM_CONDITIONAL tests
96 # which are themselves conditionally expanded.
97 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
98 ## other macros from doing the same. This should be automated.) -pme
100 # Check for C library flavor since GNU/Linux platforms use different
101 # configuration directories depending on the C library in use.
102 AC_EGREP_CPP([_using_uclibc], [
103 #include <stdio.h>
104 #if __UCLIBC__
105 _using_uclibc
106 #endif
107 ], uclibc=yes, uclibc=no)
109 AC_EGREP_CPP([_using_bionic], [
110 #include <stdio.h>
111 #if __BIONIC__
112 _using_bionic
113 #endif
114 ], bionic=yes, bionic=no)
116 # Find platform-specific directories containing configuration info.
117 # Also possibly modify flags used elsewhere, as needed by the platform.
118 GLIBCXX_CHECK_HOST
119 ])
122 dnl
123 dnl Tests for newer compiler features, or features that are present in newer
124 dnl compiler versions but not older compiler versions still in use, should
125 dnl be placed here.
126 dnl
127 dnl Defines:
128 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
129 dnl new inlining code or the new system_header pragma will die on -Werror.
130 dnl Leave it out by default and use maint-mode to use it.
131 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
132 dnl compiler supports it and the user has not requested debug mode.
133 dnl
134 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
135 # All these tests are for C++; save the language and the compiler flags.
136 # The CXXFLAGS thing is suspicious, but based on similar bits previously
137 # found in GLIBCXX_CONFIGURE.
138 AC_LANG_SAVE
139 AC_LANG_CPLUSPLUS
140 ac_test_CXXFLAGS="${CXXFLAGS+set}"
141 ac_save_CXXFLAGS="$CXXFLAGS"
143 # Check for maintainer-mode bits.
144 if test x"$USE_MAINTAINER_MODE" = xno; then
145 WERROR=''
146 else
147 WERROR='-Werror'
148 fi
150 # Check for -ffunction-sections -fdata-sections
151 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
152 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
153 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
154 if test "$ac_test_CXXFLAGS" = set; then
155 CXXFLAGS="$ac_save_CXXFLAGS"
156 else
157 # this is the suspicious part
158 CXXFLAGS=''
159 fi
160 if test x"$ac_fdsections" = x"yes"; then
161 SECTION_FLAGS='-ffunction-sections -fdata-sections'
162 fi
163 AC_MSG_RESULT($ac_fdsections)
165 AC_LANG_RESTORE
166 AC_SUBST(WERROR)
167 AC_SUBST(SECTION_FLAGS)
168 ])
171 dnl
172 dnl Check if the assembler used supports disabling generation of hardware
173 dnl capabilities. This is only supported by Sun as at the moment.
174 dnl
175 dnl Defines:
176 dnl HWCAP_FLAGS='-Wa,-nH' if possible.
177 dnl
178 AC_DEFUN([GLIBCXX_CHECK_ASSEMBLER_HWCAP], [
179 test -z "$HWCAP_FLAGS" && HWCAP_FLAGS=''
181 # Restrict the test to Solaris, other assemblers (e.g. AIX as) have -nH
182 # with a different meaning.
183 case ${target_os} in
184 solaris2*)
185 ac_save_CFLAGS="$CFLAGS"
186 CFLAGS="$CFLAGS -Wa,-nH"
188 AC_MSG_CHECKING([for as that supports -Wa,-nH])
189 AC_TRY_COMPILE([], [return 0;], [ac_hwcap_flags=yes],[ac_hwcap_flags=no])
190 if test "$ac_hwcap_flags" = "yes"; then
191 HWCAP_FLAGS="-Wa,-nH $HWCAP_FLAGS"
192 fi
193 AC_MSG_RESULT($ac_hwcap_flags)
195 CFLAGS="$ac_save_CFLAGS"
196 ;;
197 esac
199 AC_SUBST(HWCAP_FLAGS)
200 ])
203 dnl
204 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
205 dnl the native linker is in use, all variables will be defined to something
206 dnl safe (like an empty string).
207 dnl
208 dnl Defines:
209 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
210 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
211 dnl LD (as a side effect of testing)
212 dnl Sets:
213 dnl with_gnu_ld
214 dnl glibcxx_ld_is_gold (set to "no" or "yes")
215 dnl glibcxx_gnu_ld_version (possibly)
216 dnl
217 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
218 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
219 dnl
220 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
221 # If we're not using GNU ld, then there's no point in even trying these
222 # tests. Check for that first. We should have already tested for gld
223 # by now (in libtool), but require it now just to be safe...
224 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
225 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
226 AC_REQUIRE([AC_PROG_LD])
227 AC_REQUIRE([AC_PROG_AWK])
229 # The name set by libtool depends on the version of libtool. Shame on us
230 # for depending on an impl detail, but c'est la vie. Older versions used
231 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
232 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
233 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
234 # set (hence we're using an older libtool), then set it.
235 if test x${with_gnu_ld+set} != xset; then
236 if test x${ac_cv_prog_gnu_ld+set} != xset; then
237 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
238 with_gnu_ld=no
239 else
240 with_gnu_ld=$ac_cv_prog_gnu_ld
241 fi
242 fi
244 # Start by getting the version number. I think the libtool test already
245 # does some of this, but throws away the result.
246 glibcxx_ld_is_gold=no
247 if test x"$with_gnu_ld" = x"yes"; then
248 AC_MSG_CHECKING([for ld version])
249 changequote(,)
250 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
251 glibcxx_ld_is_gold=yes
252 fi
253 ldver=`$LD --version 2>/dev/null |
254 sed -e 's/GNU gold /GNU ld /;s/GNU ld version /GNU ld /;s/GNU ld ([^)]*) /GNU ld /;s/GNU ld \([0-9.][0-9.]*\).*/\1/; q'`
255 changequote([,])
256 glibcxx_gnu_ld_version=`echo $ldver | \
257 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
258 AC_MSG_RESULT($glibcxx_gnu_ld_version)
259 fi
261 # Set --gc-sections.
262 glibcxx_have_gc_sections=no
263 if test "$glibcxx_ld_is_gold" = "yes"; then
264 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
265 glibcxx_have_gc_sections=yes
266 fi
267 else
268 glibcxx_gcsections_min_ld=21602
269 if test x"$with_gnu_ld" = x"yes" &&
270 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
271 glibcxx_have_gc_sections=yes
272 fi
273 fi
274 if test "$glibcxx_have_gc_sections" = "yes"; then
275 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
276 # NB: This flag only works reliably after 2.16.1. Configure tests
277 # for this are difficult, so hard wire a value that should work.
279 ac_test_CFLAGS="${CFLAGS+set}"
280 ac_save_CFLAGS="$CFLAGS"
281 CFLAGS='-Wl,--gc-sections'
283 # Check for -Wl,--gc-sections
284 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
285 AC_TRY_LINK([ int one(void) { return 1; }
286 int two(void) { return 2; }
287 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
288 if test "$ac_gcsections" = "yes"; then
289 rm -f conftest.c
290 touch conftest.c
291 if $CC -c conftest.c; then
292 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
293 grep "Warning: gc-sections option ignored" > /dev/null; then
294 ac_gcsections=no
295 fi
296 fi
297 rm -f conftest.c conftest.o conftest
298 fi
299 if test "$ac_gcsections" = "yes"; then
300 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
301 fi
302 AC_MSG_RESULT($ac_gcsections)
304 if test "$ac_test_CFLAGS" = set; then
305 CFLAGS="$ac_save_CFLAGS"
306 else
307 # this is the suspicious part
308 CFLAGS=''
309 fi
310 fi
312 # Set -z,relro.
313 # Note this is only for shared objects.
314 ac_ld_relro=no
315 if test x"$with_gnu_ld" = x"yes"; then
316 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
317 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
318 if test -n "$cxx_z_relo"; then
319 OPT_LDFLAGS="-Wl,-z,relro"
320 ac_ld_relro=yes
321 fi
322 AC_MSG_RESULT($ac_ld_relro)
323 fi
325 # Set linker optimization flags.
326 if test x"$with_gnu_ld" = x"yes"; then
327 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
328 fi
330 AC_SUBST(SECTION_LDFLAGS)
331 AC_SUBST(OPT_LDFLAGS)
332 ])
335 dnl
336 dnl Check for headers for, and arguments to, the setrlimit() function.
337 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
338 dnl
339 dnl Defines:
340 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
341 dnl various HAVE_LIMIT_* for individual limit names
342 dnl
343 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
344 AC_MSG_CHECKING([for RLIMIT_$1])
345 AC_TRY_COMPILE(
346 [#include <unistd.h>
347 #include <sys/time.h>
348 #include <sys/resource.h>
349 ],
350 [ int f = RLIMIT_$1 ; ],
351 [glibcxx_mresult=1], [glibcxx_mresult=0])
352 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
353 [Only used in build directory testsuite_hooks.h.])
354 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
355 AC_MSG_RESULT($res)
356 ])
358 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
359 setrlimit_have_headers=yes
360 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
361 [],
362 [setrlimit_have_headers=no])
363 # If don't have the headers, then we can't run the tests now, and we
364 # won't be seeing any of these during testsuite compilation.
365 if test $setrlimit_have_headers = yes; then
366 # Can't do these in a loop, else the resulting syntax is wrong.
367 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
368 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
369 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
370 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
371 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
373 # Check for rlimit, setrlimit.
374 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
375 AC_TRY_COMPILE(
376 [#include <unistd.h>
377 #include <sys/time.h>
378 #include <sys/resource.h>
379 ],
380 [struct rlimit r;
381 setrlimit(0, &r);],
382 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
383 ])
384 fi
386 AC_MSG_CHECKING([for testsuite resource limits support])
387 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
388 ac_res_limits=yes
389 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
390 [Define if using setrlimit to set resource limits during
391 "make check"])
392 else
393 ac_res_limits=no
394 fi
395 AC_MSG_RESULT($ac_res_limits)
396 ])
399 dnl
400 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
401 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
402 dnl
403 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
405 AC_LANG_SAVE
406 AC_LANG_CPLUSPLUS
407 ac_save_CXXFLAGS="$CXXFLAGS"
408 CXXFLAGS="$CXXFLAGS -fno-exceptions"
410 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
411 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
412 GCC_TRY_COMPILE_OR_LINK(
413 [#include <sys/stat.h>],
414 [struct stat buffer;
415 fstat(0, &buffer);
416 S_ISREG(buffer.st_mode);],
417 [glibcxx_cv_S_ISREG=yes],
418 [glibcxx_cv_S_ISREG=no])
419 ])
420 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
421 GCC_TRY_COMPILE_OR_LINK(
422 [#include <sys/stat.h>],
423 [struct stat buffer;
424 fstat(0, &buffer);
425 S_IFREG & buffer.st_mode;],
426 [glibcxx_cv_S_IFREG=yes],
427 [glibcxx_cv_S_IFREG=no])
428 ])
429 res=no
430 if test $glibcxx_cv_S_ISREG = yes; then
431 AC_DEFINE(HAVE_S_ISREG, 1,
432 [Define if S_IFREG is available in <sys/stat.h>.])
433 res=S_ISREG
434 elif test $glibcxx_cv_S_IFREG = yes; then
435 AC_DEFINE(HAVE_S_IFREG, 1,
436 [Define if S_IFREG is available in <sys/stat.h>.])
437 res=S_IFREG
438 fi
439 AC_MSG_RESULT($res)
441 CXXFLAGS="$ac_save_CXXFLAGS"
442 AC_LANG_RESTORE
443 ])
446 dnl
447 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
448 dnl
449 AC_DEFUN([GLIBCXX_CHECK_POLL], [
451 AC_LANG_SAVE
452 AC_LANG_CPLUSPLUS
453 ac_save_CXXFLAGS="$CXXFLAGS"
454 CXXFLAGS="$CXXFLAGS -fno-exceptions"
456 AC_MSG_CHECKING([for poll])
457 AC_CACHE_VAL(glibcxx_cv_POLL, [
458 GCC_TRY_COMPILE_OR_LINK(
459 [#include <poll.h>],
460 [struct pollfd pfd[1];
461 pfd[0].events = POLLIN;
462 poll(pfd, 1, 0);],
463 [glibcxx_cv_POLL=yes],
464 [glibcxx_cv_POLL=no])
465 ])
466 if test $glibcxx_cv_POLL = yes; then
467 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
468 fi
469 AC_MSG_RESULT($glibcxx_cv_POLL)
471 CXXFLAGS="$ac_save_CXXFLAGS"
472 AC_LANG_RESTORE
473 ])
476 dnl
477 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
478 dnl
479 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
481 AC_LANG_SAVE
482 AC_LANG_CPLUSPLUS
483 ac_save_CXXFLAGS="$CXXFLAGS"
484 CXXFLAGS="$CXXFLAGS -fno-exceptions"
486 AC_MSG_CHECKING([for writev])
487 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
488 GCC_TRY_COMPILE_OR_LINK(
489 [#include <sys/uio.h>],
490 [struct iovec iov[2];
491 writev(0, iov, 0);],
492 [glibcxx_cv_WRITEV=yes],
493 [glibcxx_cv_WRITEV=no])
494 ])
495 if test $glibcxx_cv_WRITEV = yes; then
496 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
497 fi
498 AC_MSG_RESULT($glibcxx_cv_WRITEV)
500 CXXFLAGS="$ac_save_CXXFLAGS"
501 AC_LANG_RESTORE
502 ])
505 dnl
506 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
507 dnl Also check whether int64_t is actually a typedef to long or long long.
508 dnl
509 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
511 AC_LANG_SAVE
512 AC_LANG_CPLUSPLUS
514 AC_MSG_CHECKING([for int64_t])
515 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
516 AC_TRY_COMPILE(
517 [#include <stdint.h>],
518 [int64_t var;],
519 [glibcxx_cv_INT64_T=yes],
520 [glibcxx_cv_INT64_T=no])
521 ])
523 if test $glibcxx_cv_INT64_T = yes; then
524 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
525 AC_MSG_RESULT($glibcxx_cv_INT64_T)
527 AC_MSG_CHECKING([for int64_t as long])
528 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
529 AC_TRY_COMPILE(
530 [#include <stdint.h>
531 template<typename, typename> struct same { enum { value = -1 }; };
532 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
533 int array[same<int64_t, long>::value];], [],
534 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
535 ])
537 if test $glibcxx_cv_int64_t_long = yes; then
538 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
539 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
540 fi
542 AC_MSG_CHECKING([for int64_t as long long])
543 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
544 AC_TRY_COMPILE(
545 [#include <stdint.h>
546 template<typename, typename> struct same { enum { value = -1 }; };
547 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
548 int array[same<int64_t, long long>::value];], [],
549 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
550 ])
552 if test $glibcxx_cv_int64_t_long_long = yes; then
553 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
554 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
555 fi
556 fi
558 AC_LANG_RESTORE
559 ])
562 dnl
563 dnl Check whether LFS support is available.
564 dnl
565 AC_DEFUN([GLIBCXX_CHECK_LFS], [
566 AC_LANG_SAVE
567 AC_LANG_CPLUSPLUS
568 ac_save_CXXFLAGS="$CXXFLAGS"
569 CXXFLAGS="$CXXFLAGS -fno-exceptions"
570 AC_MSG_CHECKING([for LFS support])
571 AC_CACHE_VAL(glibcxx_cv_LFS, [
572 GCC_TRY_COMPILE_OR_LINK(
573 [#include <unistd.h>
574 #include <stdio.h>
575 #include <sys/stat.h>
576 ],
577 [FILE* fp;
578 fopen64("t", "w");
579 fseeko64(fp, 0, SEEK_CUR);
580 ftello64(fp);
581 lseek64(1, 0, SEEK_CUR);
582 struct stat64 buf;
583 fstat64(1, &buf);],
584 [glibcxx_cv_LFS=yes],
585 [glibcxx_cv_LFS=no])
586 ])
587 if test $glibcxx_cv_LFS = yes; then
588 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
589 fi
590 AC_MSG_RESULT($glibcxx_cv_LFS)
591 CXXFLAGS="$ac_save_CXXFLAGS"
592 AC_LANG_RESTORE
593 ])
596 dnl
597 dnl Check for whether a fully dynamic basic_string implementation should
598 dnl be turned on, that does not put empty objects in per-process static
599 dnl memory (mostly useful together with shared memory allocators, see PR
600 dnl libstdc++/16612 for details).
601 dnl
602 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
603 dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
604 dnl otherwise undefined
605 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
606 dnl Where DEFAULT is either `yes' or `no'.
607 dnl
608 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
609 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
610 if test $enable_fully_dynamic_string = yes; then
611 enable_fully_dynamic_string_def=1
612 else
613 enable_fully_dynamic_string_def=0
614 fi
615 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
616 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
617 ])
620 dnl
621 dnl Does any necessary configuration of the testsuite directory. Generates
622 dnl the testsuite_hooks.h header.
623 dnl
624 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
625 dnl
626 dnl Sets:
627 dnl enable_abi_check
628 dnl GLIBCXX_TEST_WCHAR_T
629 dnl GLIBCXX_TEST_THREAD
630 dnl Substs:
631 dnl baseline_dir
632 dnl baseline_subdir_switch
633 dnl
634 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
635 if $GLIBCXX_IS_NATIVE ; then
636 # Do checks for resource limit functions.
637 GLIBCXX_CHECK_SETRLIMIT
639 # Look for setenv, so that extended locale tests can be performed.
640 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
641 fi
643 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
644 test $enable_symvers != no; then
645 case "$host" in
646 *-*-cygwin*)
647 enable_abi_check=no ;;
648 *)
649 enable_abi_check=yes ;;
650 esac
651 else
652 # Only build this as native, since automake does not understand
653 # CXX_FOR_BUILD.
654 enable_abi_check=no
655 fi
657 # Export file names for ABI checking.
658 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
659 AC_SUBST(baseline_dir)
660 baseline_subdir_switch="$abi_baseline_subdir_switch"
661 AC_SUBST(baseline_subdir_switch)
662 ])
665 dnl
666 dnl Does any necessary configuration for docbook in the docs directory.
667 dnl
668 dnl XSLTPROC must be set before this
669 dnl
670 dnl Sets:
671 dnl glibcxx_stylesheets
672 dnl Substs:
673 dnl XSL_STYLE_DIR
674 dnl
675 AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
677 AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
678 glibcxx_stylesheets=no
679 if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude http://docbook.sourceforge.net/release/xsl-ns/current/xhtml-1_1/docbook.xsl - 2>/dev/null; then
680 glibcxx_stylesheets=yes
681 fi
682 AC_MSG_RESULT($glibcxx_stylesheets)
684 AC_MSG_CHECKING([for local stylesheet directory])
685 glibcxx_local_stylesheets=no
686 if test x"$glibcxx_stylesheets" = x"yes"; then
687 if test -d /usr/share/sgml/docbook/xsl-ns-stylesheets; then
688 glibcxx_local_stylesheets=yes
689 XSL_STYLE_DIR=/usr/share/sgml/docbook/xsl-ns-stylesheets
690 fi
691 if test -d /usr/share/xml/docbook/stylesheet/docbook-xsl-ns; then
692 glibcxx_local_stylesheets=yes
693 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/docbook-xsl-ns
694 fi
695 if test -d /usr/share/xml/docbook/stylesheet/nwalsh5/current; then
696 glibcxx_local_stylesheets=yes
697 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/nwalsh5/current
698 fi
699 fi
700 AC_MSG_RESULT($glibcxx_local_stylesheets)
702 if test x"$glibcxx_local_stylesheets" = x"yes"; then
703 AC_SUBST(XSL_STYLE_DIR)
704 AC_MSG_NOTICE($XSL_STYLE_DIR)
705 else
706 glibcxx_stylesheets=no
707 fi
709 # Check for epub3 dependencies.
710 AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
711 glibcxx_epub_stylesheets=no
712 if test x"$glibcxx_local_stylesheets" = x"yes"; then
713 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
714 glibcxx_epub_stylesheets=yes
715 fi
716 fi
717 AC_MSG_RESULT($glibcxx_epub_stylesheets)
718 AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
720 ])
723 dnl
724 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
725 dnl
726 dnl Substs:
727 dnl GLIBCXX_INCLUDES
728 dnl TOPLEVEL_INCLUDES
729 dnl
730 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
731 # Used for every C++ compile we perform.
732 GLIBCXX_INCLUDES="\
733 -I$glibcxx_builddir/include/$host_alias \
734 -I$glibcxx_builddir/include \
735 -I$glibcxx_srcdir/libsupc++"
737 # For Canadian crosses, pick this up too.
738 if test $CANADIAN = yes; then
739 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
740 fi
742 # Stuff in the actual top level. Currently only used by libsupc++ to
743 # get unwind* headers from the libgcc dir.
744 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
745 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
747 # Now, export this to all the little Makefiles....
748 AC_SUBST(GLIBCXX_INCLUDES)
749 AC_SUBST(TOPLEVEL_INCLUDES)
750 ])
753 dnl
754 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
755 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
756 dnl
757 dnl Substs:
758 dnl OPTIMIZE_CXXFLAGS
759 dnl WARN_FLAGS
760 dnl
761 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
762 # Optimization flags that are probably a good idea for thrill-seekers. Just
763 # uncomment the lines below and make, everything else is ready to go...
764 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
765 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
766 AC_SUBST(OPTIMIZE_CXXFLAGS)
768 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi'
769 AC_SUBST(WARN_FLAGS)
770 ])
773 dnl
774 dnl All installation directory information is determined here.
775 dnl
776 dnl Substs:
777 dnl gxx_install_dir
778 dnl glibcxx_prefixdir
779 dnl glibcxx_toolexecdir
780 dnl glibcxx_toolexeclibdir
781 dnl
782 dnl Assumes cross_compiling bits already done, and with_cross_host in
783 dnl particular.
784 dnl
785 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
786 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
787 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
788 glibcxx_toolexecdir=no
789 glibcxx_toolexeclibdir=no
790 glibcxx_prefixdir=$prefix
792 AC_MSG_CHECKING([for gxx-include-dir])
793 AC_ARG_WITH([gxx-include-dir],
794 AC_HELP_STRING([--with-gxx-include-dir=DIR],
795 [installation directory for include files]),
796 [case "$withval" in
797 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
798 no) gxx_include_dir=no ;;
799 *) gxx_include_dir=$withval ;;
800 esac],
801 [gxx_include_dir=no])
802 AC_MSG_RESULT($gxx_include_dir)
804 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
805 AC_ARG_ENABLE([version-specific-runtime-libs],
806 AC_HELP_STRING([--enable-version-specific-runtime-libs],
807 [Specify that runtime libraries should be installed in a compiler-specific directory]),
808 [case "$enableval" in
809 yes) version_specific_libs=yes ;;
810 no) version_specific_libs=no ;;
811 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
812 esac],
813 [version_specific_libs=no])
814 AC_MSG_RESULT($version_specific_libs)
816 # Default case for install directory for include files.
817 if test $version_specific_libs = no && test $gxx_include_dir = no; then
818 gxx_include_dir='include/c++/${gcc_version}'
819 if test -n "$with_cross_host" &&
820 test x"$with_cross_host" != x"no"; then
821 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
822 else
823 gxx_include_dir='${prefix}/'"$gxx_include_dir"
824 fi
825 fi
827 # Version-specific runtime libs processing.
828 if test $version_specific_libs = yes; then
829 # Need the gcc compiler version to know where to install libraries
830 # and header files if --enable-version-specific-runtime-libs option
831 # is selected. FIXME: these variables are misnamed, there are
832 # no executables installed in _toolexecdir or _toolexeclibdir.
833 if test x"$gxx_include_dir" = x"no"; then
834 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
835 fi
836 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
837 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
838 fi
840 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
841 # Install a library built with a cross compiler in tooldir, not libdir.
842 if test x"$glibcxx_toolexecdir" = x"no"; then
843 if test -n "$with_cross_host" &&
844 test x"$with_cross_host" != x"no"; then
845 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
846 glibcxx_toolexeclibdir='${toolexecdir}/lib'
847 else
848 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
849 glibcxx_toolexeclibdir='${libdir}'
850 fi
851 multi_os_directory=`$CXX -print-multi-os-directory`
852 case $multi_os_directory in
853 .) ;; # Avoid trailing /.
854 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
855 esac
856 fi
858 AC_MSG_CHECKING([for install location])
859 AC_MSG_RESULT($gxx_include_dir)
861 AC_SUBST(glibcxx_prefixdir)
862 AC_SUBST(gxx_include_dir)
863 AC_SUBST(glibcxx_toolexecdir)
864 AC_SUBST(glibcxx_toolexeclibdir)
865 ])
868 dnl
869 dnl GLIBCXX_ENABLE
870 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
871 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
872 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
873 dnl
874 dnl See docs/html/17_intro/configury.html#enable for documentation.
875 dnl
876 m4_define([GLIBCXX_ENABLE],[dnl
877 m4_define([_g_switch],[--enable-$1])dnl
878 m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
879 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
880 m4_bmatch([$5],
881 [^permit ],
882 [[
883 case "$enableval" in
884 m4_bpatsubst([$5],[permit ])) ;;
885 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
886 dnl Idea for future: generate a URL pointing to
887 dnl "onlinedocs/configopts.html#whatever"
888 esac
889 ]],
890 [^$],
891 [[
892 case "$enableval" in
893 yes|no) ;;
894 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
895 esac
896 ]],
897 [[$5]]),
898 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
899 m4_undefine([_g_switch])dnl
900 m4_undefine([_g_help])dnl
901 ])
904 dnl
905 dnl Check for ISO/IEC 9899:1999 "C99" support.
906 dnl
907 dnl --enable-c99 defines _GLIBCXX_USE_C99
908 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
909 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
910 dnl Where DEFAULT is either `yes' or `no'.
911 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
912 dnl
913 AC_DEFUN([GLIBCXX_ENABLE_C99], [
914 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
916 if test x"$enable_c99" = x"yes"; then
918 AC_LANG_SAVE
919 AC_LANG_CPLUSPLUS
921 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
922 # undefined and fake C99 facilities - like pre-standard snprintf - may be
923 # spuriously enabled.
924 # Long term, -std=c++0x could be even better, could manage to explicitely
925 # request C99 facilities to the underlying C headers.
926 ac_save_CXXFLAGS="$CXXFLAGS"
927 CXXFLAGS="$CXXFLAGS -std=c++98"
928 ac_save_LIBS="$LIBS"
929 ac_save_gcc_no_link="$gcc_no_link"
931 if test x$gcc_no_link != xyes; then
932 # Use -fno-exceptions to that the C driver can link these tests without
933 # hitting undefined references to personality routines.
934 CXXFLAGS="$CXXFLAGS -fno-exceptions"
935 AC_CHECK_LIB(m, sin, [
936 LIBS="$LIBS -lm"
937 ], [
938 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
939 gcc_no_link=yes
940 ])
941 fi
943 # Check for the existence of <math.h> functions used if C99 is enabled.
944 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
945 AC_CACHE_VAL(glibcxx_cv_c99_math, [
946 GCC_TRY_COMPILE_OR_LINK(
947 [#include <math.h>
948 volatile double d1, d2;
949 volatile int i;],
950 [i = fpclassify(d1);
951 i = isfinite(d1);
952 i = isinf(d1);
953 i = isnan(d1);
954 i = isnormal(d1);
955 i = signbit(d1);
956 i = isgreater(d1, d2);
957 i = isgreaterequal(d1, d2);
958 i = isless(d1, d2);
959 i = islessequal(d1, d2);
960 i = islessgreater(d1, d2);
961 i = islessgreater(d1, d2);
962 i = isunordered(d1, d2);
963 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
964 ])
965 AC_MSG_RESULT($glibcxx_cv_c99_math)
966 if test x"$glibcxx_cv_c99_math" = x"yes"; then
967 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
968 [Define if C99 functions or macros in <math.h> should be imported
969 in <cmath> in namespace std.])
970 fi
972 # Check for the existence of <complex.h> complex math functions.
973 # This is necessary even though libstdc++ uses the builtin versions
974 # of these functions, because if the builtin cannot be used, a reference
975 # to the library function is emitted.
976 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
977 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
978 glibcxx_cv_c99_complex=no;
979 if test x"$ac_has_complex_h" = x"yes"; then
980 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
981 GCC_TRY_COMPILE_OR_LINK(
982 [#include <complex.h>
983 typedef __complex__ float float_type;
984 typedef __complex__ double double_type;
985 typedef __complex__ long double ld_type;
986 volatile float_type tmpf;
987 volatile double_type tmpd;
988 volatile ld_type tmpld;
989 volatile float f;
990 volatile double d;
991 volatile long double ld;],
992 [f = cabsf(tmpf);
993 f = cargf(tmpf);
994 tmpf = ccosf(tmpf);
995 tmpf = ccoshf(tmpf);
996 tmpf = cexpf(tmpf);
997 tmpf = clogf(tmpf);
998 tmpf = csinf(tmpf);
999 tmpf = csinhf(tmpf);
1000 tmpf = csqrtf(tmpf);
1001 tmpf = ctanf(tmpf);
1002 tmpf = ctanhf(tmpf);
1003 tmpf = cpowf(tmpf, tmpf);
1004 tmpf = cprojf(tmpf);
1005 d = cabs(tmpd);
1006 d = carg(tmpd);
1007 tmpd = ccos(tmpd);
1008 tmpd = ccosh(tmpd);
1009 tmpd = cexp(tmpd);
1010 tmpd = clog(tmpd);
1011 tmpd = csin(tmpd);
1012 tmpd = csinh(tmpd);
1013 tmpd = csqrt(tmpd);
1014 tmpd = ctan(tmpd);
1015 tmpd = ctanh(tmpd);
1016 tmpd = cpow(tmpd, tmpd);
1017 tmpd = cproj(tmpd);
1018 ld = cabsl(tmpld);
1019 ld = cargl(tmpld);
1020 tmpld = ccosl(tmpld);
1021 tmpld = ccoshl(tmpld);
1022 tmpld = cexpl(tmpld);
1023 tmpld = clogl(tmpld);
1024 tmpld = csinl(tmpld);
1025 tmpld = csinhl(tmpld);
1026 tmpld = csqrtl(tmpld);
1027 tmpld = ctanl(tmpld);
1028 tmpld = ctanhl(tmpld);
1029 tmpld = cpowl(tmpld, tmpld);
1030 tmpld = cprojl(tmpld);
1031 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
1032 fi
1033 AC_MSG_RESULT($glibcxx_cv_c99_complex)
1034 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
1035 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
1036 [Define if C99 functions in <complex.h> should be used in
1037 <complex>. Using compiler builtins for these functions requires
1038 corresponding C99 library functions to be present.])
1039 fi
1041 # Check for the existence in <stdio.h> of vscanf, et. al.
1042 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1043 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
1044 GCC_TRY_COMPILE_OR_LINK(
1045 [#include <stdio.h>
1046 #include <stdarg.h>
1047 void foo(char* fmt, ...)
1048 {
1049 va_list args; va_start(args, fmt);
1050 vfscanf(stderr, "%i", args);
1051 vscanf("%i", args);
1052 vsnprintf(fmt, 0, "%i", args);
1053 vsscanf(fmt, "%i", args);
1054 }],
1055 [snprintf("12", 0, "%i");],
1056 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
1057 ])
1058 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
1060 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1061 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1062 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
1063 GCC_TRY_COMPILE_OR_LINK(
1064 [#include <stdlib.h>
1065 volatile float f;
1066 volatile long double ld;
1067 volatile unsigned long long ll;
1068 lldiv_t mydivt;],
1069 [char* tmp;
1070 f = strtof("gnu", &tmp);
1071 ld = strtold("gnu", &tmp);
1072 ll = strtoll("gnu", &tmp, 10);
1073 ll = strtoull("gnu", &tmp, 10);
1074 ll = llabs(10);
1075 mydivt = lldiv(10,1);
1076 ll = mydivt.quot;
1077 ll = mydivt.rem;
1078 ll = atoll("10");
1079 _Exit(0);
1080 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
1081 ])
1082 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
1084 # Check for the existence in <wchar.h> of wcstold, etc.
1085 glibcxx_cv_c99_wchar=no;
1086 if test x"$ac_has_wchar_h" = xyes &&
1087 test x"$ac_has_wctype_h" = xyes; then
1088 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1089 AC_TRY_COMPILE([#include <wchar.h>
1090 namespace test
1091 {
1092 using ::wcstold;
1093 using ::wcstoll;
1094 using ::wcstoull;
1095 }
1096 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
1098 # Checks for wide character functions that may not be present.
1099 # Injection of these is wrapped with guard macros.
1100 # NB: only put functions here, instead of immediately above, if
1101 # absolutely necessary.
1102 AC_TRY_COMPILE([#include <wchar.h>
1103 namespace test { using ::vfwscanf; } ], [],
1104 [AC_DEFINE(HAVE_VFWSCANF,1,
1105 [Defined if vfwscanf exists.])],[])
1107 AC_TRY_COMPILE([#include <wchar.h>
1108 namespace test { using ::vswscanf; } ], [],
1109 [AC_DEFINE(HAVE_VSWSCANF,1,
1110 [Defined if vswscanf exists.])],[])
1112 AC_TRY_COMPILE([#include <wchar.h>
1113 namespace test { using ::vwscanf; } ], [],
1114 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1116 AC_TRY_COMPILE([#include <wchar.h>
1117 namespace test { using ::wcstof; } ], [],
1118 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1120 AC_TRY_COMPILE([#include <wctype.h>],
1121 [ wint_t t; int i = iswblank(t);],
1122 [AC_DEFINE(HAVE_ISWBLANK,1,
1123 [Defined if iswblank exists.])],[])
1125 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
1126 fi
1128 # Option parsed, now set things appropriately.
1129 if test x"$glibcxx_cv_c99_math" = x"no" ||
1130 test x"$glibcxx_cv_c99_complex" = x"no" ||
1131 test x"$glibcxx_cv_c99_stdio" = x"no" ||
1132 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
1133 test x"$glibcxx_cv_c99_wchar" = x"no"; then
1134 enable_c99=no;
1135 else
1136 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1137 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1138 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1139 fi
1141 gcc_no_link="$ac_save_gcc_no_link"
1142 LIBS="$ac_save_LIBS"
1143 CXXFLAGS="$ac_save_CXXFLAGS"
1144 AC_LANG_RESTORE
1145 fi
1147 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1148 AC_MSG_RESULT($enable_c99)
1149 ])
1152 dnl
1153 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1154 dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1155 dnl in the C++11 standard.
1156 dnl
1157 dnl --enable-libstdcxx-time
1158 dnl --enable-libstdcxx-time=yes
1159 dnl checks for the availability of monotonic and realtime clocks,
1160 dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
1161 dnl links in the latter.
1162 dnl --enable-libstdcxx-time=rt
1163 dnl also searches (and, if needed, links) librt. Note that this is
1164 dnl not always desirable because, in glibc, for example, in turn it
1165 dnl triggers the linking of libpthread too, which activates locking,
1166 dnl a large overhead for single-thread programs.
1167 dnl --enable-libstdcxx-time=no
1168 dnl --disable-libstdcxx-time
1169 dnl disables the checks completely
1170 dnl
1171 dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1172 dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1173 dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1174 dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1175 dnl
1176 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1178 AC_MSG_CHECKING([for clock_gettime, nanosleep and sched_yield])
1179 GLIBCXX_ENABLE(libstdcxx-time,$1,[[[=KIND]]],
1180 [use KIND for check type],
1181 [permit yes|no|rt])
1183 AC_LANG_SAVE
1184 AC_LANG_CPLUSPLUS
1185 ac_save_CXXFLAGS="$CXXFLAGS"
1186 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1187 ac_save_LIBS="$LIBS"
1189 ac_has_clock_monotonic=no
1190 ac_has_clock_realtime=no
1191 AC_MSG_RESULT($enable_libstdcxx_time)
1193 if test x"$enable_libstdcxx_time" != x"no"; then
1195 if test x"$enable_libstdcxx_time" = x"rt"; then
1196 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1197 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1198 else
1199 AC_SEARCH_LIBS(clock_gettime, [posix4])
1200 AC_SEARCH_LIBS(nanosleep, [posix4])
1201 fi
1203 case "$ac_cv_search_clock_gettime" in
1204 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1205 ;;
1206 esac
1207 case "$ac_cv_search_nanosleep" in
1208 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1209 ;;
1210 esac
1212 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1214 case "$ac_cv_search_sched_yield" in
1215 -lposix4*)
1216 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1217 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1218 [ Defined if sched_yield is available. ])
1219 ;;
1220 -lrt*)
1221 if test x"$enable_libstdcxx_time" = x"rt"; then
1222 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1223 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1224 [ Defined if sched_yield is available. ])
1225 fi
1226 ;;
1227 *)
1228 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1229 [ Defined if sched_yield is available. ])
1230 ;;
1231 esac
1233 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1235 if test x"$ac_has_unistd_h" = x"yes"; then
1236 AC_MSG_CHECKING([for monotonic clock])
1237 AC_TRY_LINK(
1238 [#include <unistd.h>
1239 #include <time.h>
1240 ],
1241 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1242 timespec tp;
1243 #endif
1244 clock_gettime(CLOCK_MONOTONIC, &tp);
1245 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1247 AC_MSG_RESULT($ac_has_clock_monotonic)
1249 AC_MSG_CHECKING([for realtime clock])
1250 AC_TRY_LINK(
1251 [#include <unistd.h>
1252 #include <time.h>
1253 ],
1254 [#if _POSIX_TIMERS > 0
1255 timespec tp;
1256 #endif
1257 clock_gettime(CLOCK_REALTIME, &tp);
1258 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1260 AC_MSG_RESULT($ac_has_clock_realtime)
1262 AC_MSG_CHECKING([for nanosleep])
1263 AC_TRY_LINK(
1264 [#include <unistd.h>
1265 #include <time.h>
1266 ],
1267 [#if _POSIX_TIMERS > 0
1268 timespec tp;
1269 #endif
1270 nanosleep(&tp, 0);
1271 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1273 AC_MSG_RESULT($ac_has_nanosleep)
1274 fi
1275 fi
1277 if test x"$ac_has_clock_monotonic" = x"yes"; then
1278 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1279 [ Defined if clock_gettime has monotonic clock support. ])
1280 fi
1282 if test x"$ac_has_clock_realtime" = x"yes"; then
1283 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1284 [ Defined if clock_gettime has realtime clock support. ])
1285 fi
1287 if test x"$ac_has_nanosleep" = x"yes"; then
1288 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1289 [ Defined if nanosleep is available. ])
1290 else
1291 AC_MSG_CHECKING([for sleep])
1292 AC_TRY_COMPILE([#include <unistd.h>],
1293 [sleep(1)],
1294 [ac_has_sleep=yes],[ac_has_sleep=no])
1295 if test x"$ac_has_sleep" = x"yes"; then
1296 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1297 fi
1298 AC_MSG_RESULT($ac_has_sleep)
1299 AC_MSG_CHECKING([for usleep])
1300 AC_TRY_COMPILE([#include <unistd.h>],
1301 [sleep(1);
1302 usleep(100);],
1303 [ac_has_usleep=yes],[ac_has_usleep=no])
1304 if test x"$ac_has_usleep" = x"yes"; then
1305 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1306 fi
1307 AC_MSG_RESULT($ac_has_usleep)
1308 fi
1310 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1311 AC_MSG_CHECKING([for Sleep])
1312 AC_TRY_COMPILE([#include <windows.h>],
1313 [Sleep(1)],
1314 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1315 if test x"$ac_has_win32_sleep" = x"yes"; then
1316 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1317 fi
1318 AC_MSG_RESULT($ac_has_win32_sleep)
1319 fi
1321 AC_SUBST(GLIBCXX_LIBS)
1323 CXXFLAGS="$ac_save_CXXFLAGS"
1324 LIBS="$ac_save_LIBS"
1325 AC_LANG_RESTORE
1326 ])
1328 dnl
1329 dnl Check for gettimeofday, used in the implementation of 20.11.7
1330 dnl [time.clock] in the C++11 standard.
1331 dnl
1332 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1334 AC_MSG_CHECKING([for gettimeofday])
1336 AC_LANG_SAVE
1337 AC_LANG_CPLUSPLUS
1338 ac_save_CXXFLAGS="$CXXFLAGS"
1339 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1341 ac_has_gettimeofday=no;
1342 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1343 if test x"$ac_has_sys_time_h" = x"yes"; then
1344 AC_MSG_CHECKING([for gettimeofday])
1345 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1346 [timeval tv; gettimeofday(&tv, 0);],
1347 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1349 AC_MSG_RESULT($ac_has_gettimeofday)
1350 fi
1352 if test x"$ac_has_gettimeofday" = x"yes"; then
1353 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1354 [ Defined if gettimeofday is available. ])
1355 fi
1357 CXXFLAGS="$ac_save_CXXFLAGS"
1358 AC_LANG_RESTORE
1359 ])
1361 dnl
1362 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1363 dnl facilities in Chapter 8, "C compatibility".
1364 dnl
1365 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1367 AC_LANG_SAVE
1368 AC_LANG_CPLUSPLUS
1370 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1371 # undefined and fake C99 facilities may be spuriously enabled.
1372 ac_save_CXXFLAGS="$CXXFLAGS"
1373 CXXFLAGS="$CXXFLAGS -std=c++98"
1375 # Check for the existence of <complex.h> complex math functions used
1376 # by tr1/complex.
1377 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1378 ac_c99_complex_tr1=no;
1379 if test x"$ac_has_complex_h" = x"yes"; then
1380 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1381 AC_TRY_COMPILE([#include <complex.h>],
1382 [typedef __complex__ float float_type; float_type tmpf;
1383 cacosf(tmpf);
1384 casinf(tmpf);
1385 catanf(tmpf);
1386 cacoshf(tmpf);
1387 casinhf(tmpf);
1388 catanhf(tmpf);
1389 typedef __complex__ double double_type; double_type tmpd;
1390 cacos(tmpd);
1391 casin(tmpd);
1392 catan(tmpd);
1393 cacosh(tmpd);
1394 casinh(tmpd);
1395 catanh(tmpd);
1396 typedef __complex__ long double ld_type; ld_type tmpld;
1397 cacosl(tmpld);
1398 casinl(tmpld);
1399 catanl(tmpld);
1400 cacoshl(tmpld);
1401 casinhl(tmpld);
1402 catanhl(tmpld);
1403 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1404 fi
1405 AC_MSG_RESULT($ac_c99_complex_tr1)
1406 if test x"$ac_c99_complex_tr1" = x"yes"; then
1407 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1408 [Define if C99 functions in <complex.h> should be used in
1409 <tr1/complex>. Using compiler builtins for these functions
1410 requires corresponding C99 library functions to be present.])
1411 fi
1413 # Check for the existence of <ctype.h> functions.
1414 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1415 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1416 AC_TRY_COMPILE([#include <ctype.h>],
1417 [int ch;
1418 int ret;
1419 ret = isblank(ch);
1420 ],[glibcxx_cv_c99_ctype_tr1=yes],
1421 [glibcxx_cv_c99_ctype_tr1=no])
1422 ])
1423 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1424 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1425 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1426 [Define if C99 functions in <ctype.h> should be imported in
1427 <tr1/cctype> in namespace std::tr1.])
1428 fi
1430 # Check for the existence of <fenv.h> functions.
1431 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1432 ac_c99_fenv_tr1=no;
1433 if test x"$ac_has_fenv_h" = x"yes"; then
1434 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1435 AC_TRY_COMPILE([#include <fenv.h>],
1436 [int except, mode;
1437 fexcept_t* pflag;
1438 fenv_t* penv;
1439 int ret;
1440 ret = feclearexcept(except);
1441 ret = fegetexceptflag(pflag, except);
1442 ret = feraiseexcept(except);
1443 ret = fesetexceptflag(pflag, except);
1444 ret = fetestexcept(except);
1445 ret = fegetround();
1446 ret = fesetround(mode);
1447 ret = fegetenv(penv);
1448 ret = feholdexcept(penv);
1449 ret = fesetenv(penv);
1450 ret = feupdateenv(penv);
1451 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1452 fi
1453 AC_MSG_RESULT($ac_c99_fenv_tr1)
1454 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1455 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1456 [Define if C99 functions in <fenv.h> should be imported in
1457 <tr1/cfenv> in namespace std::tr1.])
1458 fi
1460 # Check for the existence of <stdint.h> types.
1461 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1462 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1463 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1464 #define __STDC_CONSTANT_MACROS
1465 #include <stdint.h>],
1466 [typedef int8_t my_int8_t;
1467 my_int8_t i8 = INT8_MIN;
1468 i8 = INT8_MAX;
1469 typedef int16_t my_int16_t;
1470 my_int16_t i16 = INT16_MIN;
1471 i16 = INT16_MAX;
1472 typedef int32_t my_int32_t;
1473 my_int32_t i32 = INT32_MIN;
1474 i32 = INT32_MAX;
1475 typedef int64_t my_int64_t;
1476 my_int64_t i64 = INT64_MIN;
1477 i64 = INT64_MAX;
1478 typedef int_fast8_t my_int_fast8_t;
1479 my_int_fast8_t if8 = INT_FAST8_MIN;
1480 if8 = INT_FAST8_MAX;
1481 typedef int_fast16_t my_int_fast16_t;
1482 my_int_fast16_t if16 = INT_FAST16_MIN;
1483 if16 = INT_FAST16_MAX;
1484 typedef int_fast32_t my_int_fast32_t;
1485 my_int_fast32_t if32 = INT_FAST32_MIN;
1486 if32 = INT_FAST32_MAX;
1487 typedef int_fast64_t my_int_fast64_t;
1488 my_int_fast64_t if64 = INT_FAST64_MIN;
1489 if64 = INT_FAST64_MAX;
1490 typedef int_least8_t my_int_least8_t;
1491 my_int_least8_t il8 = INT_LEAST8_MIN;
1492 il8 = INT_LEAST8_MAX;
1493 typedef int_least16_t my_int_least16_t;
1494 my_int_least16_t il16 = INT_LEAST16_MIN;
1495 il16 = INT_LEAST16_MAX;
1496 typedef int_least32_t my_int_least32_t;
1497 my_int_least32_t il32 = INT_LEAST32_MIN;
1498 il32 = INT_LEAST32_MAX;
1499 typedef int_least64_t my_int_least64_t;
1500 my_int_least64_t il64 = INT_LEAST64_MIN;
1501 il64 = INT_LEAST64_MAX;
1502 typedef intmax_t my_intmax_t;
1503 my_intmax_t im = INTMAX_MAX;
1504 im = INTMAX_MIN;
1505 typedef intptr_t my_intptr_t;
1506 my_intptr_t ip = INTPTR_MAX;
1507 ip = INTPTR_MIN;
1508 typedef uint8_t my_uint8_t;
1509 my_uint8_t ui8 = UINT8_MAX;
1510 ui8 = UINT8_MAX;
1511 typedef uint16_t my_uint16_t;
1512 my_uint16_t ui16 = UINT16_MAX;
1513 ui16 = UINT16_MAX;
1514 typedef uint32_t my_uint32_t;
1515 my_uint32_t ui32 = UINT32_MAX;
1516 ui32 = UINT32_MAX;
1517 typedef uint64_t my_uint64_t;
1518 my_uint64_t ui64 = UINT64_MAX;
1519 ui64 = UINT64_MAX;
1520 typedef uint_fast8_t my_uint_fast8_t;
1521 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1522 uif8 = UINT_FAST8_MAX;
1523 typedef uint_fast16_t my_uint_fast16_t;
1524 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1525 uif16 = UINT_FAST16_MAX;
1526 typedef uint_fast32_t my_uint_fast32_t;
1527 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1528 uif32 = UINT_FAST32_MAX;
1529 typedef uint_fast64_t my_uint_fast64_t;
1530 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1531 uif64 = UINT_FAST64_MAX;
1532 typedef uint_least8_t my_uint_least8_t;
1533 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1534 uil8 = UINT_LEAST8_MAX;
1535 typedef uint_least16_t my_uint_least16_t;
1536 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1537 uil16 = UINT_LEAST16_MAX;
1538 typedef uint_least32_t my_uint_least32_t;
1539 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1540 uil32 = UINT_LEAST32_MAX;
1541 typedef uint_least64_t my_uint_least64_t;
1542 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1543 uil64 = UINT_LEAST64_MAX;
1544 typedef uintmax_t my_uintmax_t;
1545 my_uintmax_t uim = UINTMAX_MAX;
1546 uim = UINTMAX_MAX;
1547 typedef uintptr_t my_uintptr_t;
1548 my_uintptr_t uip = UINTPTR_MAX;
1549 uip = UINTPTR_MAX;
1550 ],[glibcxx_cv_c99_stdint_tr1=yes],
1551 [glibcxx_cv_c99_stdint_tr1=no])
1552 ])
1553 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1554 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1555 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1556 [Define if C99 types in <stdint.h> should be imported in
1557 <tr1/cstdint> in namespace std::tr1.])
1558 fi
1560 # Check for the existence of <math.h> functions.
1561 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1562 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1563 AC_TRY_COMPILE([#include <math.h>],
1564 [typedef double_t my_double_t;
1565 typedef float_t my_float_t;
1566 acosh(0.0);
1567 acoshf(0.0f);
1568 acoshl(0.0l);
1569 asinh(0.0);
1570 asinhf(0.0f);
1571 asinhl(0.0l);
1572 atanh(0.0);
1573 atanhf(0.0f);
1574 atanhl(0.0l);
1575 cbrt(0.0);
1576 cbrtf(0.0f);
1577 cbrtl(0.0l);
1578 copysign(0.0, 0.0);
1579 copysignf(0.0f, 0.0f);
1580 copysignl(0.0l, 0.0l);
1581 erf(0.0);
1582 erff(0.0f);
1583 erfl(0.0l);
1584 erfc(0.0);
1585 erfcf(0.0f);
1586 erfcl(0.0l);
1587 exp2(0.0);
1588 exp2f(0.0f);
1589 exp2l(0.0l);
1590 expm1(0.0);
1591 expm1f(0.0f);
1592 expm1l(0.0l);
1593 fdim(0.0, 0.0);
1594 fdimf(0.0f, 0.0f);
1595 fdiml(0.0l, 0.0l);
1596 fma(0.0, 0.0, 0.0);
1597 fmaf(0.0f, 0.0f, 0.0f);
1598 fmal(0.0l, 0.0l, 0.0l);
1599 fmax(0.0, 0.0);
1600 fmaxf(0.0f, 0.0f);
1601 fmaxl(0.0l, 0.0l);
1602 fmin(0.0, 0.0);
1603 fminf(0.0f, 0.0f);
1604 fminl(0.0l, 0.0l);
1605 hypot(0.0, 0.0);
1606 hypotf(0.0f, 0.0f);
1607 hypotl(0.0l, 0.0l);
1608 ilogb(0.0);
1609 ilogbf(0.0f);
1610 ilogbl(0.0l);
1611 lgamma(0.0);
1612 lgammaf(0.0f);
1613 lgammal(0.0l);
1614 llrint(0.0);
1615 llrintf(0.0f);
1616 llrintl(0.0l);
1617 llround(0.0);
1618 llroundf(0.0f);
1619 llroundl(0.0l);
1620 log1p(0.0);
1621 log1pf(0.0f);
1622 log1pl(0.0l);
1623 log2(0.0);
1624 log2f(0.0f);
1625 log2l(0.0l);
1626 logb(0.0);
1627 logbf(0.0f);
1628 logbl(0.0l);
1629 lrint(0.0);
1630 lrintf(0.0f);
1631 lrintl(0.0l);
1632 lround(0.0);
1633 lroundf(0.0f);
1634 lroundl(0.0l);
1635 nan(0);
1636 nanf(0);
1637 nanl(0);
1638 nearbyint(0.0);
1639 nearbyintf(0.0f);
1640 nearbyintl(0.0l);
1641 nextafter(0.0, 0.0);
1642 nextafterf(0.0f, 0.0f);
1643 nextafterl(0.0l, 0.0l);
1644 nexttoward(0.0, 0.0);
1645 nexttowardf(0.0f, 0.0f);
1646 nexttowardl(0.0l, 0.0l);
1647 remainder(0.0, 0.0);
1648 remainderf(0.0f, 0.0f);
1649 remainderl(0.0l, 0.0l);
1650 remquo(0.0, 0.0, 0);
1651 remquof(0.0f, 0.0f, 0);
1652 remquol(0.0l, 0.0l, 0);
1653 rint(0.0);
1654 rintf(0.0f);
1655 rintl(0.0l);
1656 round(0.0);
1657 roundf(0.0f);
1658 roundl(0.0l);
1659 scalbln(0.0, 0l);
1660 scalblnf(0.0f, 0l);
1661 scalblnl(0.0l, 0l);
1662 scalbn(0.0, 0);
1663 scalbnf(0.0f, 0);
1664 scalbnl(0.0l, 0);
1665 tgamma(0.0);
1666 tgammaf(0.0f);
1667 tgammal(0.0l);
1668 trunc(0.0);
1669 truncf(0.0f);
1670 truncl(0.0l);
1671 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1672 ])
1673 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1674 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1675 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1676 [Define if C99 functions or macros in <math.h> should be imported
1677 in <tr1/cmath> in namespace std::tr1.])
1678 fi
1680 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1681 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1682 ac_c99_inttypes_tr1=no;
1683 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1684 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1685 AC_TRY_COMPILE([#include <inttypes.h>],
1686 [intmax_t i, numer, denom, base;
1687 const char* s;
1688 char** endptr;
1689 intmax_t ret = imaxabs(i);
1690 imaxdiv_t dret = imaxdiv(numer, denom);
1691 ret = strtoimax(s, endptr, base);
1692 uintmax_t uret = strtoumax(s, endptr, base);
1693 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1694 fi
1695 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1696 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1697 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1698 [Define if C99 functions in <inttypes.h> should be imported in
1699 <tr1/cinttypes> in namespace std::tr1.])
1700 fi
1702 # Check for the existence of whcar_t <inttypes.h> functions (NB: doesn't
1703 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1704 ac_c99_inttypes_wchar_t_tr1=no;
1705 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1706 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1707 AC_TRY_COMPILE([#include <inttypes.h>],
1708 [intmax_t base;
1709 const wchar_t* s;
1710 wchar_t** endptr;
1711 intmax_t ret = wcstoimax(s, endptr, base);
1712 uintmax_t uret = wcstoumax(s, endptr, base);
1713 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1714 [ac_c99_inttypes_wchar_t_tr1=no])
1715 fi
1716 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1717 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
1718 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
1719 [Define if wchar_t C99 functions in <inttypes.h> should be
1720 imported in <tr1/cinttypes> in namespace std::tr1.])
1721 fi
1723 # Check for the existence of the <stdbool.h> header.
1724 AC_CHECK_HEADERS(stdbool.h)
1726 # Check for the existence of the <stdalign.h> header.
1727 AC_CHECK_HEADERS(stdalign.h)
1729 CXXFLAGS="$ac_save_CXXFLAGS"
1730 AC_LANG_RESTORE
1731 ])
1733 dnl
1734 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
1735 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1736 dnl
1737 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1739 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
1740 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1741 if test -r /dev/random && test -r /dev/urandom; then
1742 ## For MSys environment the test above is detect as false-positive
1743 ## on mingw-targets. So disable it explicit for them.
1744 case ${target_os} in
1745 *mingw*) glibcxx_cv_random_tr1=no ;;
1746 *) glibcxx_cv_random_tr1=yes ;;
1747 esac
1748 else
1749 glibcxx_cv_random_tr1=no;
1750 fi
1751 ])
1752 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1754 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1755 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1756 [Define if /dev/random and /dev/urandom are available for
1757 the random_device of TR1 (Chapter 5.1).])
1758 fi
1760 ])
1762 dnl
1763 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
1764 dnl
1765 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
1767 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
1768 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
1769 [#include <stdio.h>],
1770 [AC_MSG_ERROR([computing EOF failed])])
1771 ])
1772 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
1773 [Define to the value of the EOF integer constant.])
1775 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
1776 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
1777 [#include <stdio.h>],
1778 [AC_MSG_ERROR([computing SEEK_CUR failed])])
1779 ])
1780 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
1781 [Define to the value of the SEEK_CUR integer constant.])
1783 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
1784 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
1785 [#include <stdio.h>],
1786 [AC_MSG_ERROR([computing SEEK_END failed])])
1787 ])
1788 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
1789 [Define to the value of the SEEK_END integer constant.])
1790 ])
1792 dnl
1793 dnl Check whether required C++ overloads are present in <stdio.h>.
1794 dnl
1795 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
1797 AC_LANG_SAVE
1798 AC_LANG_CPLUSPLUS
1800 AC_MSG_CHECKING([for gets declaration])
1801 AC_CACHE_VAL(glibcxx_cv_gets, [
1802 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
1803 [#include <stdio.h>
1804 namespace test
1805 {
1806 using ::gets;
1807 }
1808 ])],
1809 [glibcxx_cv_gets=yes],
1810 [glibcxx_cv_gets=no]
1811 )])
1813 if test $glibcxx_cv_gets = yes; then
1814 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h>.])
1815 fi
1816 AC_MSG_RESULT($glibcxx_cv_gets)
1818 AC_LANG_RESTORE
1819 ])
1821 dnl
1822 dnl Check whether macros, etc are present for <system_error>
1823 dnl
1824 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1826 m4_pushdef([n_syserr], [1])dnl
1827 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1828 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1829 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
1830 ECHILD, ENOSPC, EPERM,
1831 ETIMEDOUT, EWOULDBLOCK],
1832 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1833 AC_MSG_CHECKING([for syserr])
1834 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1835 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1836 [int i = syserr;])],
1837 [glibcxx_cv_system_error[]n_syserr=yes],
1838 [glibcxx_cv_system_error[]n_syserr=no])
1839 ])
1840 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1841 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1842 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1843 fi
1844 m4_define([n_syserr], m4_incr(n_syserr))dnl
1845 m4_popdef([SYSERR])dnl
1846 ])
1847 m4_popdef([n_syserr])dnl
1848 ])
1850 dnl
1851 dnl Check for what type of C headers to use.
1852 dnl
1853 dnl --enable-cheaders= [does stuff].
1854 dnl --disable-cheaders [does not do anything, really].
1855 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1856 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1857 dnl
1858 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1859 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
1860 [construct "C" headers for g++], [permit c|c_std|c_global])
1861 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1863 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1865 # Allow overrides to configure.host here.
1866 if test $enable_cheaders = c_global; then
1867 c_compatibility=yes
1868 fi
1870 AC_SUBST(C_INCLUDE_DIR)
1871 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1872 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1873 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1874 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1875 ])
1878 dnl
1879 dnl Check for which locale library to use. The choice is mapped to
1880 dnl a subdirectory of config/locale.
1881 dnl
1882 dnl Default is generic.
1883 dnl
1884 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1885 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
1886 [use MODEL for target locale package],
1887 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
1889 # Deal with gettext issues. Default to not using it (=no) until we detect
1890 # support for it later. Let the user turn it off via --e/d, but let that
1891 # default to on for easier handling.
1892 USE_NLS=no
1893 AC_ARG_ENABLE(nls,
1894 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1895 [],
1896 [enable_nls=yes])
1898 # Either a known package, or "auto"
1899 if test $enable_clocale = no || test $enable_clocale = yes; then
1900 enable_clocale=auto
1901 fi
1902 enable_clocale_flag=$enable_clocale
1904 # Probe for locale model to use if none specified.
1905 # Default to "generic".
1906 if test $enable_clocale_flag = auto; then
1907 case ${target_os} in
1908 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1909 enable_clocale_flag=gnu
1910 ;;
1911 darwin* | freebsd*)
1912 enable_clocale_flag=darwin
1913 ;;
1914 openbsd*)
1915 enable_clocale_flag=newlib
1916 ;;
1917 *)
1918 if test x"$with_newlib" = x"yes"; then
1919 enable_clocale_flag=newlib
1920 else
1921 enable_clocale_flag=generic
1922 fi
1923 ;;
1924 esac
1925 fi
1927 # Sanity check model, and test for special functionality.
1928 if test $enable_clocale_flag = gnu; then
1929 AC_EGREP_CPP([_GLIBCXX_ok], [
1930 #include <features.h>
1931 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
1932 _GLIBCXX_ok
1933 #endif
1934 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1936 # Set it to scream when it hurts.
1937 ac_save_CFLAGS="$CFLAGS"
1938 CFLAGS="-Wimplicit-function-declaration -Werror"
1940 # Use strxfrm_l if available.
1941 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1942 #include <string.h>
1943 #include <locale.h>],
1944 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1945 AC_DEFINE(HAVE_STRXFRM_L, 1,
1946 [Define if strxfrm_l is available in <string.h>.]),)
1948 # Use strerror_l if available.
1949 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1950 #include <string.h>
1951 #include <locale.h>],
1952 [__locale_t loc; strerror_l(5, loc);],
1953 AC_DEFINE(HAVE_STRERROR_L, 1,
1954 [Define if strerror_l is available in <string.h>.]),)
1956 CFLAGS="$ac_save_CFLAGS"
1957 fi
1959 # Perhaps use strerror_r if available, and strerror_l isn't.
1960 ac_save_CFLAGS="$CFLAGS"
1961 CFLAGS="-Wimplicit-function-declaration -Werror"
1962 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1963 #include <string.h>
1964 #include <locale.h>],
1965 [char s[128]; strerror_r(5, s, 128);],
1966 AC_DEFINE(HAVE_STRERROR_R, 1,
1967 [Define if strerror_r is available in <string.h>.]),)
1968 CFLAGS="$ac_save_CFLAGS"
1970 # Set configure bits for specified locale package
1971 AC_MSG_CHECKING([for C locale to use])
1972 case ${enable_clocale_flag} in
1973 generic)
1974 AC_MSG_RESULT(generic)
1976 CLOCALE_H=config/locale/generic/c_locale.h
1977 CLOCALE_CC=config/locale/generic/c_locale.cc
1978 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1979 CCOLLATE_CC=config/locale/generic/collate_members.cc
1980 CCTYPE_CC=config/locale/generic/ctype_members.cc
1981 CMESSAGES_H=config/locale/generic/messages_members.h
1982 CMESSAGES_CC=config/locale/generic/messages_members.cc
1983 CMONEY_CC=config/locale/generic/monetary_members.cc
1984 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1985 CTIME_H=config/locale/generic/time_members.h
1986 CTIME_CC=config/locale/generic/time_members.cc
1987 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1988 ;;
1989 darwin)
1990 AC_MSG_RESULT(darwin or freebsd)
1992 CLOCALE_H=config/locale/generic/c_locale.h
1993 CLOCALE_CC=config/locale/generic/c_locale.cc
1994 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1995 CCOLLATE_CC=config/locale/generic/collate_members.cc
1996 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1997 CMESSAGES_H=config/locale/generic/messages_members.h
1998 CMESSAGES_CC=config/locale/generic/messages_members.cc
1999 CMONEY_CC=config/locale/generic/monetary_members.cc
2000 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2001 CTIME_H=config/locale/generic/time_members.h
2002 CTIME_CC=config/locale/generic/time_members.cc
2003 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2004 ;;
2006 gnu)
2007 AC_MSG_RESULT(gnu)
2009 # Declare intention to use gettext, and add support for specific
2010 # languages.
2011 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
2012 ALL_LINGUAS="de fr"
2014 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
2015 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2016 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
2017 USE_NLS=yes
2018 fi
2019 # Export the build objects.
2020 for ling in $ALL_LINGUAS; do \
2021 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2022 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
2023 done
2024 AC_SUBST(glibcxx_MOFILES)
2025 AC_SUBST(glibcxx_POFILES)
2027 CLOCALE_H=config/locale/gnu/c_locale.h
2028 CLOCALE_CC=config/locale/gnu/c_locale.cc
2029 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
2030 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2031 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2032 CMESSAGES_H=config/locale/gnu/messages_members.h
2033 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2034 CMONEY_CC=config/locale/gnu/monetary_members.cc
2035 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
2036 CTIME_H=config/locale/gnu/time_members.h
2037 CTIME_CC=config/locale/gnu/time_members.cc
2038 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
2039 ;;
2040 ieee_1003.1-2001)
2041 AC_MSG_RESULT(IEEE 1003.1)
2043 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2044 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
2045 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2046 CCOLLATE_CC=config/locale/generic/collate_members.cc
2047 CCTYPE_CC=config/locale/generic/ctype_members.cc
2048 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2049 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2050 CMONEY_CC=config/locale/generic/monetary_members.cc
2051 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2052 CTIME_H=config/locale/generic/time_members.h
2053 CTIME_CC=config/locale/generic/time_members.cc
2054 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2055 ;;
2056 newlib)
2057 AC_MSG_RESULT(newlib)
2059 CLOCALE_H=config/locale/generic/c_locale.h
2060 CLOCALE_CC=config/locale/generic/c_locale.cc
2061 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2062 CCOLLATE_CC=config/locale/generic/collate_members.cc
2063 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2064 CMESSAGES_H=config/locale/generic/messages_members.h
2065 CMESSAGES_CC=config/locale/generic/messages_members.cc
2066 CMONEY_CC=config/locale/generic/monetary_members.cc
2067 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2068 CTIME_H=config/locale/generic/time_members.h
2069 CTIME_CC=config/locale/generic/time_members.cc
2070 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2071 ;;
2072 esac
2074 # This is where the testsuite looks for locale catalogs, using the
2075 # -DLOCALEDIR define during testsuite compilation.
2076 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2077 AC_SUBST(glibcxx_localedir)
2079 # A standalone libintl (e.g., GNU libintl) may be in use.
2080 if test $USE_NLS = yes; then
2081 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2082 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2083 fi
2084 if test $USE_NLS = yes; then
2085 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2086 [Define if NLS translations are to be used.])
2087 fi
2089 AC_SUBST(USE_NLS)
2090 AC_SUBST(CLOCALE_H)
2091 AC_SUBST(CMESSAGES_H)
2092 AC_SUBST(CCODECVT_CC)
2093 AC_SUBST(CCOLLATE_CC)
2094 AC_SUBST(CCTYPE_CC)
2095 AC_SUBST(CMESSAGES_CC)
2096 AC_SUBST(CMONEY_CC)
2097 AC_SUBST(CNUMERIC_CC)
2098 AC_SUBST(CTIME_H)
2099 AC_SUBST(CTIME_CC)
2100 AC_SUBST(CLOCALE_CC)
2101 AC_SUBST(CLOCALE_INTERNAL_H)
2102 ])
2105 dnl
2106 dnl Check for which std::allocator base class to use. The choice is
2107 dnl mapped from a subdirectory of include/ext.
2108 dnl
2109 dnl Default is new.
2110 dnl
2111 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2112 AC_MSG_CHECKING([for std::allocator base class])
2113 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2114 [use KIND for target std::allocator base],
2115 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2117 # If they didn't use this option switch, or if they specified --enable
2118 # with no specific model, we'll have to look for one. If they
2119 # specified --disable (???), do likewise.
2120 if test $enable_libstdcxx_allocator = no ||
2121 test $enable_libstdcxx_allocator = yes;
2122 then
2123 enable_libstdcxx_allocator=auto
2124 fi
2126 # Either a known package, or "auto". Auto implies the default choice
2127 # for a particular platform.
2128 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2130 # Probe for host-specific support if no specific model is specified.
2131 # Default to "new".
2132 if test $enable_libstdcxx_allocator_flag = auto; then
2133 case ${target_os} in
2134 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2135 enable_libstdcxx_allocator_flag=new
2136 ;;
2137 *)
2138 enable_libstdcxx_allocator_flag=new
2139 ;;
2140 esac
2141 fi
2142 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2145 # Set configure bits for specified locale package
2146 case ${enable_libstdcxx_allocator_flag} in
2147 bitmap)
2148 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2149 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2150 ;;
2151 malloc)
2152 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2153 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2154 ;;
2155 mt)
2156 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2157 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2158 ;;
2159 new)
2160 ALLOCATOR_H=config/allocator/new_allocator_base.h
2161 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2162 ;;
2163 pool)
2164 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2165 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2166 ;;
2167 esac
2169 AC_SUBST(ALLOCATOR_H)
2170 AC_SUBST(ALLOCATOR_NAME)
2171 ])
2174 dnl
2175 dnl Check for whether the Boost-derived checks should be turned on.
2176 dnl
2177 dnl --enable-concept-checks turns them on.
2178 dnl --disable-concept-checks leaves them off.
2179 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2180 dnl Where DEFAULT is either `yes' or `no'.
2181 dnl
2182 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2183 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2184 if test $enable_concept_checks = yes; then
2185 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2186 [Define to use concept checking code from the boost libraries.])
2187 fi
2188 ])
2190 dnl
2191 dnl Use extern templates.
2192 dnl
2193 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2194 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2196 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2197 dnl Where DEFAULT is `yes' or `no'.
2198 dnl
2199 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2201 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2203 AC_MSG_CHECKING([for extern template support])
2204 AC_MSG_RESULT([$enable_extern_template])
2206 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2207 ])
2209 dnl
2210 dnl Check for parallel mode pre-requisites, including OpenMP support.
2211 dnl
2212 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2213 dnl
2214 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2216 enable_parallel=no;
2218 # See if configured libgomp/omp.h exists. (libgomp may be in
2219 # noconfigdirs but not explicitly disabled.)
2220 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2221 enable_parallel=yes;
2222 else
2223 AC_MSG_NOTICE([target-libgomp not built])
2224 fi
2226 AC_MSG_CHECKING([for parallel mode support])
2227 AC_MSG_RESULT([$enable_parallel])
2228 ])
2231 dnl
2232 dnl Check for which I/O library to use: stdio, or something specific.
2233 dnl
2234 dnl Default is stdio.
2235 dnl
2236 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2237 AC_MSG_CHECKING([for underlying I/O to use])
2238 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2239 [use target-specific I/O package], [permit stdio])
2241 # Now that libio has been removed, you can have any color you want as long
2242 # as it's black. This is one big no-op until other packages are added, but
2243 # showing the framework never hurts.
2244 case ${enable_cstdio} in
2245 stdio)
2246 CSTDIO_H=config/io/c_io_stdio.h
2247 BASIC_FILE_H=config/io/basic_file_stdio.h
2248 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2249 AC_MSG_RESULT(stdio)
2250 ;;
2251 esac
2253 AC_SUBST(CSTDIO_H)
2254 AC_SUBST(BASIC_FILE_H)
2255 AC_SUBST(BASIC_FILE_CC)
2256 ])
2259 dnl
2260 dnl Check for "unusual" flags to pass to the compiler while building.
2261 dnl
2262 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2263 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2264 dnl --disable-cxx-flags passes nothing.
2265 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2266 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2267 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2268 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2269 dnl If "default flags" is an empty string, the effect is the same
2270 dnl as --disable or --enable=no.
2271 dnl
2272 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2273 AC_MSG_CHECKING([for extra compiler flags for building])
2274 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2275 [pass compiler FLAGS when building library],
2276 [case "x$enable_cxx_flags" in
2277 xno | x) enable_cxx_flags= ;;
2278 x-*) ;;
2279 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2280 esac])
2282 # Run through flags (either default or command-line) and set anything
2283 # extra (e.g., #defines) that must accompany particular g++ options.
2284 if test -n "$enable_cxx_flags"; then
2285 for f in $enable_cxx_flags; do
2286 case "$f" in
2287 -fhonor-std) ;;
2288 -*) ;;
2289 *) # and we're trying to pass /what/ exactly?
2290 AC_MSG_ERROR([compiler flags start with a -]) ;;
2291 esac
2292 done
2293 fi
2295 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2296 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2297 AC_SUBST(EXTRA_CXX_FLAGS)
2298 ])
2301 dnl
2302 dnl Check to see if debugging libraries are to be built.
2303 dnl
2304 dnl --enable-libstdcxx-debug
2305 dnl builds a separate set of debugging libraries in addition to the
2306 dnl normal (shared, static) libstdc++ binaries.
2307 dnl
2308 dnl --disable-libstdcxx-debug
2309 dnl builds only one (non-debug) version of libstdc++.
2310 dnl
2311 dnl --enable-libstdcxx-debug-flags=FLAGS
2312 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2313 dnl
2314 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2315 dnl Where DEFAULT is either `yes' or `no'.
2316 dnl
2317 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2318 AC_MSG_CHECKING([for additional debug build])
2319 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2320 AC_MSG_RESULT($enable_libstdcxx_debug)
2321 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2322 ])
2325 dnl
2326 dnl Check for explicit debug flags.
2327 dnl
2328 dnl --enable-libstdcxx-debug-flags='-O1'
2329 dnl is a general method for passing flags to be used when
2330 dnl building debug libraries with --enable-debug.
2331 dnl
2332 dnl --disable-libstdcxx-debug-flags does nothing.
2333 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2334 dnl If "default flags" is an empty string, the effect is the same
2335 dnl as --disable or --enable=no.
2336 dnl
2337 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2338 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2339 [pass compiler FLAGS when building debug library],
2340 [case "x$enable_libstdcxx_debug_flags" in
2341 xno | x) enable_libstdcxx_debug_flags= ;;
2342 x-*) ;;
2343 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2344 esac])
2346 # Option parsed, now set things appropriately
2347 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2348 AC_SUBST(DEBUG_FLAGS)
2350 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2351 ])
2354 dnl
2355 dnl Check if the user only wants a freestanding library implementation.
2356 dnl
2357 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2358 dnl installing only the headers required by [17.4.1.3] and the language
2359 dnl support library. More than that will be built (to keep the Makefiles
2360 dnl conveniently clean), but not installed.
2361 dnl
2362 dnl Sets:
2363 dnl is_hosted (yes/no)
2364 dnl
2365 dnl Defines:
2366 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2367 dnl
2368 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2369 AC_ARG_ENABLE([hosted-libstdcxx],
2370 AC_HELP_STRING([--disable-hosted-libstdcxx],
2371 [only build freestanding C++ runtime support]),,
2372 [case "$host" in
2373 arm*-*-symbianelf*)
2374 enable_hosted_libstdcxx=no
2375 ;;
2376 *)
2377 enable_hosted_libstdcxx=yes
2378 ;;
2379 esac])
2380 if test "$enable_hosted_libstdcxx" = no; then
2381 AC_MSG_NOTICE([Only freestanding libraries will be built])
2382 is_hosted=no
2383 hosted_define=0
2384 enable_abi_check=no
2385 enable_libstdcxx_pch=no
2386 else
2387 is_hosted=yes
2388 hosted_define=1
2389 fi
2390 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2391 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2392 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2393 ])
2396 dnl
2397 dnl Check if the user wants a non-verbose library implementation.
2398 dnl
2399 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2400 dnl standard error on termination.
2401 dnl
2402 dnl Defines:
2403 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2404 dnl
2405 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2406 AC_ARG_ENABLE([libstdcxx-verbose],
2407 AC_HELP_STRING([--disable-libstdcxx-verbose],
2408 [disable termination messages to standard error]),,
2409 [enable_libstdcxx_verbose=yes])
2410 if test x"$enable_libstdcxx_verbose" = xyes; then
2411 verbose_define=1
2412 else
2413 AC_MSG_NOTICE([verbose termination messages are disabled])
2414 verbose_define=0
2415 fi
2416 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
2417 [Define to 1 if a verbose library is built, or 0 otherwise.])
2418 ])
2421 dnl
2422 dnl Check for template specializations for the 'long long' type.
2423 dnl The result determines only whether 'long long' I/O is enabled; things
2424 dnl like numeric_limits<> specializations are always available.
2425 dnl
2426 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2427 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2428 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2429 dnl Where DEFAULT is either `yes' or `no'.
2430 dnl
2431 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2432 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2433 if test $enable_long_long = yes; then
2434 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2435 [Define if code specialized for long long should be used.])
2436 fi
2437 AC_MSG_CHECKING([for enabled long long specializations])
2438 AC_MSG_RESULT([$enable_long_long])
2439 ])
2442 dnl
2443 dnl Check for decimal floating point.
2444 dnl See:
2445 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2446 dnl
2447 dnl This checks to see if the host supports decimal floating point types.
2448 dnl
2449 dnl Defines:
2450 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2451 dnl
2452 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2454 # Fake what AC_TRY_COMPILE does, without linking as this is
2455 # unnecessary for this test.
2457 cat > conftest.$ac_ext << EOF
2458 [#]line __oline__ "configure"
2459 int main()
2460 {
2461 _Decimal32 d1;
2462 _Decimal64 d2;
2463 _Decimal128 d3;
2464 return 0;
2465 }
2466 EOF
2468 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2469 if AC_TRY_EVAL(ac_compile); then
2470 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2471 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2472 enable_dfp=yes
2473 else
2474 enable_dfp=no
2475 fi
2476 AC_MSG_RESULT($enable_dfp)
2477 rm -f conftest*
2478 ])
2480 dnl
2481 dnl Check for GNU 128-bit integer and floating point types.
2482 dnl
2483 dnl Note: also checks that the types aren't standard types.
2484 dnl
2485 dnl Defines:
2486 dnl _GLIBCXX_USE_INT128
2487 dnl _GLIBCXX_USE_FLOAT128
2488 dnl
2489 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
2491 AC_LANG_SAVE
2492 AC_LANG_CPLUSPLUS
2494 # Fake what AC_TRY_COMPILE does, without linking as this is
2495 # unnecessary for this test.
2497 cat > conftest.$ac_ext << EOF
2498 [#]line __oline__ "configure"
2499 template<typename T1, typename T2>
2500 struct same
2501 { typedef T2 type; };
2503 template<typename T>
2504 struct same<T, T>;
2506 int main()
2507 {
2508 typename same<long, __int128>::type i1;
2509 typename same<long long, __int128>::type i2;
2510 }
2511 EOF
2513 AC_MSG_CHECKING([for __int128])
2514 if AC_TRY_EVAL(ac_compile); then
2515 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
2516 [Define if __int128 is supported on this host.])
2517 enable_int128=yes
2518 else
2519 enable_int128=no
2520 fi
2521 AC_MSG_RESULT($enable_int128)
2522 rm -f conftest*
2524 cat > conftest.$ac_ext << EOF
2525 [#]line __oline__ "configure"
2526 template<typename T1, typename T2>
2527 struct same
2528 { typedef T2 type; };
2530 template<typename T>
2531 struct same<T, T>;
2533 int main()
2534 {
2535 typename same<double, __float128>::type f1;
2536 typename same<long double, __float128>::type f2;
2537 }
2538 EOF
2540 AC_MSG_CHECKING([for __float128])
2541 if AC_TRY_EVAL(ac_compile); then
2542 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
2543 [Define if __float128 is supported on this host.])
2544 enable_float128=yes
2545 else
2546 enable_float128=no
2547 fi
2548 AC_MSG_RESULT($enable_float128)
2549 rm -f conftest*
2551 AC_LANG_RESTORE
2552 ])
2554 dnl
2555 dnl Check for template specializations for the 'wchar_t' type.
2556 dnl
2557 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2558 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2559 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2560 dnl Where DEFAULT is either `yes' or `no'.
2561 dnl
2562 dnl Necessary support must also be present.
2563 dnl
2564 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2565 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2567 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2568 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2569 AC_MSG_CHECKING([for mbstate_t])
2570 AC_TRY_COMPILE([#include <wchar.h>],
2571 [mbstate_t teststate;],
2572 have_mbstate_t=yes, have_mbstate_t=no)
2573 AC_MSG_RESULT($have_mbstate_t)
2574 if test x"$have_mbstate_t" = xyes; then
2575 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2576 fi
2578 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2579 # ac_has_wchar_h.
2580 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2582 if test x"$enable_wchar_t" = x"yes"; then
2584 AC_LANG_SAVE
2585 AC_LANG_CPLUSPLUS
2587 if test x"$ac_has_wchar_h" = xyes &&
2588 test x"$ac_has_wctype_h" = xyes; then
2589 AC_TRY_COMPILE([#include <wchar.h>
2590 #include <stddef.h>
2591 wint_t i;
2592 long l = WEOF;
2593 long j = WCHAR_MIN;
2594 long k = WCHAR_MAX;
2595 namespace test
2596 {
2597 using ::btowc;
2598 using ::fgetwc;
2599 using ::fgetws;
2600 using ::fputwc;
2601 using ::fputws;
2602 using ::fwide;
2603 using ::fwprintf;
2604 using ::fwscanf;
2605 using ::getwc;
2606 using ::getwchar;
2607 using ::mbrlen;
2608 using ::mbrtowc;
2609 using ::mbsinit;
2610 using ::mbsrtowcs;
2611 using ::putwc;
2612 using ::putwchar;
2613 using ::swprintf;
2614 using ::swscanf;
2615 using ::ungetwc;
2616 using ::vfwprintf;
2617 using ::vswprintf;
2618 using ::vwprintf;
2619 using ::wcrtomb;
2620 using ::wcscat;
2621 using ::wcschr;
2622 using ::wcscmp;
2623 using ::wcscoll;
2624 using ::wcscpy;
2625 using ::wcscspn;
2626 using ::wcsftime;
2627 using ::wcslen;
2628 using ::wcsncat;
2629 using ::wcsncmp;
2630 using ::wcsncpy;
2631 using ::wcspbrk;
2632 using ::wcsrchr;
2633 using ::wcsrtombs;
2634 using ::wcsspn;
2635 using ::wcsstr;
2636 using ::wcstod;
2637 using ::wcstok;
2638 using ::wcstol;
2639 using ::wcstoul;
2640 using ::wcsxfrm;
2641 using ::wctob;
2642 using ::wmemchr;
2643 using ::wmemcmp;
2644 using ::wmemcpy;
2645 using ::wmemmove;
2646 using ::wmemset;
2647 using ::wprintf;
2648 using ::wscanf;
2649 }
2650 ],[],[], [enable_wchar_t=no])
2651 else
2652 enable_wchar_t=no
2653 fi
2655 AC_LANG_RESTORE
2656 fi
2658 if test x"$enable_wchar_t" = x"yes"; then
2659 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2660 [Define if code specialized for wchar_t should be used.])
2661 fi
2663 AC_MSG_CHECKING([for enabled wchar_t specializations])
2664 AC_MSG_RESULT([$enable_wchar_t])
2665 ])
2668 dnl
2669 dnl Check to see if building and using a C++ precompiled header can be done.
2670 dnl
2671 dnl --enable-libstdcxx-pch=yes
2672 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2673 dnl may work, after some light-hearted attempts to puzzle out compiler
2674 dnl support, flip bits on in include/Makefile.am
2675 dnl
2676 dnl --disable-libstdcxx-pch
2677 dnl turns off attempts to use or build stdc++.h.gch.
2678 dnl
2679 dnl Substs:
2680 dnl glibcxx_PCHFLAGS
2681 dnl
2682 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2683 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2684 if test $enable_libstdcxx_pch = yes; then
2685 AC_CACHE_CHECK([for compiler with PCH support],
2686 [glibcxx_cv_prog_CXX_pch],
2687 [ac_save_CXXFLAGS="$CXXFLAGS"
2688 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2689 AC_LANG_SAVE
2690 AC_LANG_CPLUSPLUS
2691 echo '#include <math.h>' > conftest.h
2692 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2693 -o conftest.h.gch 1>&5 2>&1 &&
2694 echo '#error "pch failed"' > conftest.h &&
2695 echo '#include "conftest.h"' > conftest.cc &&
2696 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2697 then
2698 glibcxx_cv_prog_CXX_pch=yes
2699 else
2700 glibcxx_cv_prog_CXX_pch=no
2701 fi
2702 rm -f conftest*
2703 CXXFLAGS=$ac_save_CXXFLAGS
2704 AC_LANG_RESTORE
2705 ])
2706 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2707 fi
2709 AC_MSG_CHECKING([for enabled PCH])
2710 AC_MSG_RESULT([$enable_libstdcxx_pch])
2712 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2713 if test $enable_libstdcxx_pch = yes; then
2714 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2715 else
2716 glibcxx_PCHFLAGS=""
2717 fi
2718 AC_SUBST(glibcxx_PCHFLAGS)
2719 ])
2722 dnl
2723 dnl Check for atomic builtins.
2724 dnl See:
2725 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
2726 dnl
2727 dnl This checks to see if the host supports the compiler-generated
2728 dnl builtins for atomic operations for various integral sizes. Note, this
2729 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2730 dnl that are used should be checked.
2731 dnl
2732 dnl Note:
2733 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
2734 dnl
2735 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2736 AC_LANG_SAVE
2737 AC_LANG_CPLUSPLUS
2738 old_CXXFLAGS="$CXXFLAGS"
2740 # Do link tests if possible, instead asm tests, limited to some platforms
2741 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
2742 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
2743 atomic_builtins_link_tests=no
2744 if test x$gcc_no_link != xyes; then
2745 # Can do link tests. Limit to some tested platforms
2746 case "$host" in
2747 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
2748 atomic_builtins_link_tests=yes
2749 ;;
2750 esac
2751 fi
2753 if test x$atomic_builtins_link_tests = xyes; then
2755 # Do link tests.
2757 CXXFLAGS="$CXXFLAGS -fno-exceptions"
2759 AC_MSG_CHECKING([for atomic builtins for bool])
2760 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
2761 AC_TRY_LINK(
2762 [ ],
2763 [typedef bool atomic_type;
2764 atomic_type c1;
2765 atomic_type c2;
2766 atomic_type c3(0);
2767 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2768 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2769 __ATOMIC_RELAXED);
2770 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2771 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2772 ],
2773 [glibcxx_cv_atomic_bool=yes],
2774 [glibcxx_cv_atomic_bool=no])
2775 ])
2776 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2778 AC_MSG_CHECKING([for atomic builtins for short])
2779 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
2780 AC_TRY_LINK(
2781 [ ],
2782 [typedef short atomic_type;
2783 atomic_type c1;
2784 atomic_type c2;
2785 atomic_type c3(0);
2786 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2787 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2788 __ATOMIC_RELAXED);
2789 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2790 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2791 ],
2792 [glibcxx_cv_atomic_short=yes],
2793 [glibcxx_cv_atomic_short=no])
2794 ])
2795 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2797 AC_MSG_CHECKING([for atomic builtins for int])
2798 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
2799 AC_TRY_LINK(
2800 [ ],
2801 [typedef int atomic_type;
2802 atomic_type c1;
2803 atomic_type c2;
2804 atomic_type c3(0);
2805 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2806 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2807 __ATOMIC_RELAXED);
2808 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2809 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2810 ],
2811 [glibcxx_cv_atomic_int=yes],
2812 [glibcxx_cv_atomic_int=no])
2813 ])
2814 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2816 AC_MSG_CHECKING([for atomic builtins for long long])
2817 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
2818 AC_TRY_LINK(
2819 [ ],
2820 [typedef long long atomic_type;
2821 atomic_type c1;
2822 atomic_type c2;
2823 atomic_type c3(0);
2824 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2825 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2826 __ATOMIC_RELAXED);
2827 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2828 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2829 ],
2830 [glibcxx_cv_atomic_long_long=yes],
2831 [glibcxx_cv_atomic_long_long=no])
2832 ])
2833 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2835 else
2837 # Do asm tests.
2839 # Compile unoptimized.
2840 CXXFLAGS='-O0 -S'
2842 # Fake what AC_TRY_COMPILE does.
2844 cat > conftest.$ac_ext << EOF
2845 [#]line __oline__ "configure"
2846 int main()
2847 {
2848 typedef bool atomic_type;
2849 atomic_type c1;
2850 atomic_type c2;
2851 atomic_type c3(0);
2852 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2853 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2854 __ATOMIC_RELAXED);
2855 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2856 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2858 return 0;
2859 }
2860 EOF
2862 AC_MSG_CHECKING([for atomic builtins for bool])
2863 if AC_TRY_EVAL(ac_compile); then
2864 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2865 glibcxx_cv_atomic_bool=no
2866 else
2867 glibcxx_cv_atomic_bool=yes
2868 fi
2869 fi
2870 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2871 rm -f conftest*
2873 cat > conftest.$ac_ext << EOF
2874 [#]line __oline__ "configure"
2875 int main()
2876 {
2877 typedef short atomic_type;
2878 atomic_type c1;
2879 atomic_type c2;
2880 atomic_type c3(0);
2881 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2882 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2883 __ATOMIC_RELAXED);
2884 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2885 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2887 return 0;
2888 }
2889 EOF
2891 AC_MSG_CHECKING([for atomic builtins for short])
2892 if AC_TRY_EVAL(ac_compile); then
2893 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2894 glibcxx_cv_atomic_short=no
2895 else
2896 glibcxx_cv_atomic_short=yes
2897 fi
2898 fi
2899 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2900 rm -f conftest*
2902 cat > conftest.$ac_ext << EOF
2903 [#]line __oline__ "configure"
2904 int main()
2905 {
2906 // NB: _Atomic_word not necessarily int.
2907 typedef int atomic_type;
2908 atomic_type c1;
2909 atomic_type c2;
2910 atomic_type c3(0);
2911 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2912 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2913 __ATOMIC_RELAXED);
2914 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2915 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2917 return 0;
2918 }
2919 EOF
2921 AC_MSG_CHECKING([for atomic builtins for int])
2922 if AC_TRY_EVAL(ac_compile); then
2923 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2924 glibcxx_cv_atomic_int=no
2925 else
2926 glibcxx_cv_atomic_int=yes
2927 fi
2928 fi
2929 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2930 rm -f conftest*
2932 cat > conftest.$ac_ext << EOF
2933 [#]line __oline__ "configure"
2934 int main()
2935 {
2936 typedef long long atomic_type;
2937 atomic_type c1;
2938 atomic_type c2;
2939 atomic_type c3(0);
2940 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2941 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2942 __ATOMIC_RELAXED);
2943 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2944 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2946 return 0;
2947 }
2948 EOF
2950 AC_MSG_CHECKING([for atomic builtins for long long])
2951 if AC_TRY_EVAL(ac_compile); then
2952 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2953 glibcxx_cv_atomic_long_long=no
2954 else
2955 glibcxx_cv_atomic_long_long=yes
2956 fi
2957 fi
2958 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2959 rm -f conftest*
2961 fi
2963 CXXFLAGS="$old_CXXFLAGS"
2964 AC_LANG_RESTORE
2966 # Set atomicity_dir to builtins if all but the long long test above passes.
2967 if test $glibcxx_cv_atomic_bool = yes \
2968 && test $glibcxx_cv_atomic_short = yes \
2969 && test $glibcxx_cv_atomic_int = yes; then
2970 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2971 [Define if the compiler supports C++11 atomics.])
2972 atomicity_dir=cpu/generic/atomicity_builtins
2973 fi
2975 # If still generic, set to mutex.
2976 if test $atomicity_dir = "cpu/generic" ; then
2977 atomicity_dir=cpu/generic/atomicity_mutex
2978 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2979 if test "x$target_thread_file" = xsingle; then
2980 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2981 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2982 else
2983 AC_MSG_WARN([They will be faked using a mutex.])
2984 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2985 fi
2986 fi
2988 ])
2991 dnl
2992 dnl Check for exception handling support. If an explicit enable/disable
2993 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2994 dnl target may or may not support call frame exceptions.
2995 dnl
2996 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2997 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2998 dnl Neither one forces an attempt at detection.
2999 dnl
3000 dnl Defines:
3001 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
3002 dnl
3003 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
3004 AC_MSG_CHECKING([for exception model to use])
3005 AC_LANG_SAVE
3006 AC_LANG_CPLUSPLUS
3007 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
3008 [force use of builtin_setjmp for exceptions],
3009 [permit yes|no|auto])
3011 if test $enable_sjlj_exceptions = auto; then
3012 # Botheration. Now we've got to detect the exception model. Link tests
3013 # against libgcc.a are problematic since we've not been given proper -L
3014 # bits for single-tree newlib and libgloss.
3015 #
3016 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
3017 cat > conftest.$ac_ext << EOF
3018 [#]line __oline__ "configure"
3019 struct S { ~S(); };
3020 void bar();
3021 void foo()
3022 {
3023 S s;
3024 bar();
3025 }
3026 EOF
3027 old_CXXFLAGS="$CXXFLAGS"
3028 CXXFLAGS=-S
3029 if AC_TRY_EVAL(ac_compile); then
3030 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
3031 enable_sjlj_exceptions=yes
3032 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
3033 enable_sjlj_exceptions=no
3034 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
3035 enable_sjlj_exceptions=no
3036 fi
3037 fi
3038 CXXFLAGS="$old_CXXFLAGS"
3039 rm -f conftest*
3040 fi
3042 # This is a tad weird, for hysterical raisins. We have to map
3043 # enable/disable to two different models.
3044 case $enable_sjlj_exceptions in
3045 yes)
3046 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
3047 [Define if the compiler is configured for setjmp/longjmp exceptions.])
3048 ac_exception_model_name=sjlj
3049 ;;
3050 no)
3051 ac_exception_model_name="call frame"
3052 ;;
3053 *)
3054 AC_MSG_ERROR([unable to detect exception model])
3055 ;;
3056 esac
3057 AC_LANG_RESTORE
3058 AC_MSG_RESULT($ac_exception_model_name)
3059 ])
3062 dnl
3063 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3064 dnl
3065 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3066 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3067 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3068 dnl Where DEFAULT is 'yes'.
3069 dnl
3070 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3071 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3073 if test x$enable_libstdcxx_visibility = xyes ; then
3074 dnl all hail libgfortran
3075 dnl Check whether the target supports hidden visibility.
3076 AC_CACHE_CHECK([whether the target supports hidden visibility],
3077 glibcxx_cv_have_attribute_visibility, [
3078 save_CFLAGS="$CFLAGS"
3079 CFLAGS="$CFLAGS -Werror"
3080 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3081 [], glibcxx_cv_have_attribute_visibility=yes,
3082 glibcxx_cv_have_attribute_visibility=no)
3083 CFLAGS="$save_CFLAGS"])
3084 if test $glibcxx_cv_have_attribute_visibility = no; then
3085 enable_libstdcxx_visibility=no
3086 fi
3087 fi
3089 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3090 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3091 ])
3094 dnl
3095 dnl Add version tags to symbols in shared library (or not), additionally
3096 dnl marking other symbols as private/local (or not).
3097 dnl
3098 dnl Sets libtool_VERSION, and determines shared library SONAME.
3099 dnl
3100 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3101 dnl
3102 dnl --enable-symvers=style adds a version script to the linker call when
3103 dnl creating the shared library. The choice of version script is
3104 dnl controlled by 'style'.
3105 dnl --disable-symvers does not.
3106 dnl
3107 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3108 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3109 dnl choose a default style based on linker characteristics. Passing
3110 dnl 'no' disables versioning.
3111 dnl
3112 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3114 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3115 [enables symbol versioning of the shared library],
3116 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3118 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3119 # don't know enough about $LD to do tricks...
3120 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3121 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3122 # with extern "C++" in version scripts.
3123 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3125 # Turn a 'yes' into a suitable default.
3126 if test x$enable_symvers = xyes ; then
3127 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3128 enable_symvers=no
3129 else
3130 if test $with_gnu_ld = yes ; then
3131 case ${target_os} in
3132 hpux*)
3133 enable_symvers=no ;;
3134 *)
3135 enable_symvers=gnu ;;
3136 esac
3137 else
3138 case ${target_os} in
3139 darwin*)
3140 enable_symvers=darwin ;;
3141 # Sun symbol versioning exists since Solaris 2.5.
3142 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3143 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3144 # version scripts, so disable symbol versioning if none can be
3145 # found.
3146 if test -z "$ac_cv_path_CXXFILT"; then
3147 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3148 AC_MSG_WARN([=== no GNU c++filt could be found.])
3149 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3150 enable_symvers=no
3151 else
3152 enable_symvers=sun
3153 fi
3154 ;;
3155 *)
3156 enable_symvers=no ;;
3157 esac
3158 fi
3159 fi
3160 fi
3162 # Check to see if 'darwin' or 'darwin-export' can win.
3163 if test x$enable_symvers = xdarwin-export ; then
3164 enable_symvers=darwin
3165 fi
3167 # Check if 'sun' was requested on non-Solaris 2 platforms.
3168 if test x$enable_symvers = xsun ; then
3169 case ${target_os} in
3170 solaris2*)
3171 # All fine.
3172 ;;
3173 *)
3174 # Unlikely to work.
3175 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3176 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3177 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3178 enable_symvers=no
3179 ;;
3180 esac
3181 fi
3183 # Check to see if 'gnu' can win.
3184 if test $enable_symvers = gnu ||
3185 test $enable_symvers = gnu-versioned-namespace ||
3186 test $enable_symvers = sun; then
3187 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3188 AC_MSG_CHECKING([for shared libgcc])
3189 ac_save_CFLAGS="$CFLAGS"
3190 CFLAGS=' -lgcc_s'
3191 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3192 CFLAGS="$ac_save_CFLAGS"
3193 if test $glibcxx_shared_libgcc = no; then
3194 cat > conftest.c <<EOF
3195 int main (void) { return 0; }
3196 EOF
3197 changequote(,)dnl
3198 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3199 -shared -shared-libgcc -o conftest.so \
3200 conftest.c -v 2>&1 >/dev/null \
3201 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3202 changequote([,])dnl
3203 rm -f conftest.c conftest.so
3204 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3205 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3206 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3207 CFLAGS="$ac_save_CFLAGS"
3208 fi
3209 fi
3210 AC_MSG_RESULT($glibcxx_shared_libgcc)
3212 # For GNU ld, we need at least this version. The format is described in
3213 # GLIBCXX_CHECK_LINKER_FEATURES above.
3214 glibcxx_min_gnu_ld_version=21400
3216 # If no shared libgcc, can't win.
3217 if test $glibcxx_shared_libgcc != yes; then
3218 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3219 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3220 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3221 enable_symvers=no
3222 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3223 : All interesting versions of Sun ld support sun style symbol versioning.
3224 elif test $with_gnu_ld != yes ; then
3225 # just fail for now
3226 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3227 AC_MSG_WARN([=== you are not using the GNU linker.])
3228 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3229 enable_symvers=no
3230 elif test $glibcxx_ld_is_gold = yes ; then
3231 : All versions of gold support symbol versioning.
3232 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3233 # The right tools, the right setup, but too old. Fallbacks?
3234 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3235 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3236 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3237 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3238 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3239 enable_symvers=no
3240 fi
3241 fi
3243 # For libtool versioning info, format is CURRENT:REVISION:AGE
3244 libtool_VERSION=6:19:0
3246 # Everything parsed; figure out what files and settings to use.
3247 case $enable_symvers in
3248 no)
3249 SYMVER_FILE=config/abi/pre/none.ver
3250 ;;
3251 gnu)
3252 SYMVER_FILE=config/abi/pre/gnu.ver
3253 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3254 [Define to use GNU versioning in the shared library.])
3255 ;;
3256 gnu-versioned-namespace)
3257 libtool_VERSION=7:0:0
3258 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3259 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3260 [Define to use GNU namespace versioning in the shared library.])
3261 ;;
3262 darwin)
3263 SYMVER_FILE=config/abi/pre/gnu.ver
3264 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3265 [Define to use darwin versioning in the shared library.])
3266 ;;
3267 sun)
3268 SYMVER_FILE=config/abi/pre/gnu.ver
3269 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3270 [Define to use Sun versioning in the shared library.])
3271 ;;
3272 esac
3274 if test x$enable_symvers != xno ; then
3275 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3276 [Define to use symbol versioning in the shared library.])
3277 fi
3279 AC_CACHE_CHECK([whether the target supports .symver directive],
3280 glibcxx_cv_have_as_symver_directive, [
3281 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3282 [], glibcxx_cv_have_as_symver_directive=yes,
3283 glibcxx_cv_have_as_symver_directive=no)])
3284 if test $glibcxx_cv_have_as_symver_directive = yes; then
3285 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3286 [Define to 1 if the target assembler supports .symver directive.])
3287 fi
3289 AC_SUBST(SYMVER_FILE)
3290 AC_SUBST(port_specific_symbol_files)
3291 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3292 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3293 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3294 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3295 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3296 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3298 if test $enable_symvers != no ; then
3299 case ${target_os} in
3300 # The Solaris 2 runtime linker doesn't support the GNU extension of
3301 # binding the same symbol to different versions
3302 solaris2*)
3303 ;;
3304 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3305 *)
3306 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3307 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3308 ;;
3309 esac
3310 fi
3312 # Now, set up compatibility support, if any.
3313 # In addition, need this to deal with std::size_t mangling in
3314 # src/compatibility.cc. In a perfect world, could use
3315 # typeid(std::size_t).name()[0] to do direct substitution.
3316 AC_MSG_CHECKING([for size_t as unsigned int])
3317 ac_save_CFLAGS="$CFLAGS"
3318 CFLAGS="-Werror"
3319 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3320 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3321 CFLAGS=$ac_save_CFLAGS
3322 if test "$glibcxx_size_t_is_i" = yes; then
3323 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3324 fi
3325 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3327 AC_MSG_CHECKING([for ptrdiff_t as int])
3328 ac_save_CFLAGS="$CFLAGS"
3329 CFLAGS="-Werror"
3330 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3331 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3332 CFLAGS=$ac_save_CFLAGS
3333 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3334 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3335 fi
3336 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3337 ])
3340 dnl
3341 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3342 dnl We must stage the required headers so that they will be installed
3343 dnl with the library (unlike libgcc, the STL implementation is provided
3344 dnl solely within headers). Since we must not inject random user-space
3345 dnl macro names into user-provided C++ code, we first stage into <file>-in
3346 dnl and process to <file> with an output command. The reason for a two-
3347 dnl stage process here is to correctly handle $srcdir!=$objdir without
3348 dnl having to write complex code (the sed commands to clean the macro
3349 dnl namespace are complex and fragile enough as it is). We must also
3350 dnl add a relative path so that -I- is supported properly.
3351 dnl
3352 dnl Substs:
3353 dnl thread_header
3354 dnl
3355 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3356 AC_MSG_CHECKING([for thread model used by GCC])
3357 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3358 AC_MSG_RESULT([$target_thread_file])
3359 GCC_AC_THREAD_HEADER([$target_thread_file])
3360 ])
3363 dnl
3364 dnl Check if gthread implementation defines the types and functions
3365 dnl required by the c++0x thread library. Conforming gthread
3366 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3367 dnl
3368 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3369 dnl
3370 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3371 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3373 if test x$enable_libstdcxx_threads = xauto ||
3374 test x$enable_libstdcxx_threads = xyes; then
3376 AC_LANG_SAVE
3377 AC_LANG_CPLUSPLUS
3379 ac_save_CXXFLAGS="$CXXFLAGS"
3380 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3381 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3383 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3384 case $target_thread_file in
3385 posix)
3386 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3387 esac
3389 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3391 AC_TRY_COMPILE([#include <unistd.h>],
3392 [
3393 // In case of POSIX threads check _POSIX_TIMEOUTS.
3394 #if (defined(_PTHREADS) \
3395 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3396 #error
3397 #endif
3398 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3400 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3401 [Define to 1 if mutex_timedlock is available.])
3403 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3404 else res_mutex_timedlock=no ; fi
3405 AC_MSG_RESULT([$res_mutex_timedlock])
3407 AC_MSG_CHECKING([for gthreads library])
3409 AC_TRY_COMPILE([#include "gthr.h"],
3410 [
3411 #ifndef __GTHREADS_CXX0X
3412 #error
3413 #endif
3414 ], [case $target_os in
3415 # gthreads support breaks symbol versioning on Solaris 9 (PR
3416 # libstdc++/52189).
3417 solaris2.9*)
3418 if test x$enable_symvers = xno; then
3419 ac_has_gthreads=yes
3420 elif test x$enable_libstdcxx_threads = xyes; then
3421 AC_MSG_WARN([You have requested C++11 threads support, but])
3422 AC_MSG_WARN([this breaks symbol versioning.])
3423 ac_has_gthreads=yes
3424 else
3425 ac_has_gthreads=no
3426 fi
3427 ;;
3428 *)
3429 ac_has_gthreads=yes
3430 ;;
3431 esac],
3432 [ac_has_gthreads=no])
3433 else
3434 ac_has_gthreads=no
3435 fi
3437 AC_MSG_RESULT([$ac_has_gthreads])
3439 if test x"$ac_has_gthreads" = x"yes"; then
3440 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3441 [Define if gthreads library is available.])
3442 fi
3444 CXXFLAGS="$ac_save_CXXFLAGS"
3445 AC_LANG_RESTORE
3446 ])
3449 # Check whether LC_MESSAGES is available in <locale.h>.
3450 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3451 #
3452 # This file file be copied and used freely without restrictions. It can
3453 # be used in projects which are not available under the GNU Public License
3454 # but which still want to provide support for the GNU gettext functionality.
3455 # Please note that the actual code is *not* freely available.
3456 AC_DEFUN([AC_LC_MESSAGES], [
3457 AC_CHECK_HEADER(locale.h, [
3458 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3459 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3460 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3461 if test $ac_cv_val_LC_MESSAGES = yes; then
3462 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3463 [Define if LC_MESSAGES is available in <locale.h>.])
3464 fi
3465 ])
3466 ])
3468 dnl
3469 dnl Check whether rdrand is supported in the assembler.
3470 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3471 AC_MSG_CHECKING([for rdrand support in assembler])
3472 AC_CACHE_VAL(ac_cv_x86_rdrand, [
3473 ac_cv_x86_rdrand=no
3474 case "$target" in
3475 i?86-*-* | \
3476 x86_64-*-*)
3477 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3478 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3479 esac
3480 ])
3481 if test $ac_cv_x86_rdrand = yes; then
3482 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3483 [ Defined if as can handle rdrand. ])
3484 fi
3485 AC_MSG_RESULT($ac_cv_x86_rdrand)
3486 ])
3488 dnl
3489 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3490 dnl
3491 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3493 AC_LANG_SAVE
3494 AC_LANG_CPLUSPLUS
3495 ac_save_CXXFLAGS="$CXXFLAGS"
3496 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3498 AC_MSG_CHECKING([for get_nprocs])
3499 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3500 GCC_TRY_COMPILE_OR_LINK(
3501 [#include <sys/sysinfo.h>],
3502 [int n = get_nprocs();],
3503 [glibcxx_cv_GET_NPROCS=yes],
3504 [glibcxx_cv_GET_NPROCS=no])
3505 ])
3506 if test $glibcxx_cv_GET_NPROCS = yes; then
3507 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3508 fi
3509 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3511 CXXFLAGS="$ac_save_CXXFLAGS"
3512 AC_LANG_RESTORE
3513 ])
3515 dnl
3516 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3517 dnl
3518 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3520 AC_LANG_SAVE
3521 AC_LANG_CPLUSPLUS
3522 ac_save_CXXFLAGS="$CXXFLAGS"
3523 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3525 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3526 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3527 GCC_TRY_COMPILE_OR_LINK(
3528 [#include <unistd.h>],
3529 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3530 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3531 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3532 ])
3533 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3534 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3535 fi
3536 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3538 CXXFLAGS="$ac_save_CXXFLAGS"
3539 AC_LANG_RESTORE
3540 ])
3542 dnl
3543 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
3544 dnl
3545 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
3547 AC_LANG_SAVE
3548 AC_LANG_CPLUSPLUS
3549 ac_save_CXXFLAGS="$CXXFLAGS"
3550 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3552 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
3553 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
3554 GCC_TRY_COMPILE_OR_LINK(
3555 [#include <unistd.h>],
3556 [int n = sysconf(_SC_NPROC_ONLN);],
3557 [glibcxx_cv_SC_NPROC_ONLN=yes],
3558 [glibcxx_cv_SC_NPROC_ONLN=no])
3559 ])
3560 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
3561 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
3562 fi
3563 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
3565 CXXFLAGS="$ac_save_CXXFLAGS"
3566 AC_LANG_RESTORE
3567 ])
3569 dnl
3570 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
3571 dnl
3572 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
3574 AC_LANG_SAVE
3575 AC_LANG_CPLUSPLUS
3576 ac_save_CXXFLAGS="$CXXFLAGS"
3577 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3579 AC_MSG_CHECKING([for pthreads_num_processors_np])
3580 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
3581 GCC_TRY_COMPILE_OR_LINK(
3582 [#include <pthread.h>],
3583 [int n = pthread_num_processors_np();],
3584 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
3585 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
3586 ])
3587 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
3588 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
3589 fi
3590 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
3592 CXXFLAGS="$ac_save_CXXFLAGS"
3593 AC_LANG_RESTORE
3594 ])
3596 dnl
3597 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
3598 dnl
3599 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
3601 AC_LANG_SAVE
3602 AC_LANG_CPLUSPLUS
3603 ac_save_CXXFLAGS="$CXXFLAGS"
3604 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3606 AC_MSG_CHECKING([for hw.ncpu sysctl])
3607 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
3608 GCC_TRY_COMPILE_OR_LINK(
3609 [
3610 #include <stddef.h>
3611 #include <sys/sysctl.h>
3612 ],
3613 [
3614 int count;
3615 size_t size = sizeof(count);
3616 int mib[] = { CTL_HW, HW_NCPU };
3617 sysctl(mib, 2, &count, &size, NULL, 0);
3618 ],
3619 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
3620 [glibcxx_cv_SYSCTL_HW_NCPU=no])
3621 ])
3622 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
3623 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
3624 fi
3625 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
3627 CXXFLAGS="$ac_save_CXXFLAGS"
3628 AC_LANG_RESTORE
3629 ])
3631 dnl
3632 dnl Check to see if python pretty printing can be activated.
3633 dnl
3634 dnl --with-python-dir=dir
3635 dnl installs directory into $prefix/dir
3636 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
3638 AC_MSG_CHECKING([for custom python install directory])
3639 AC_ARG_WITH([python-dir],
3640 AS_HELP_STRING([--with-python-dir],
3641 [the location to install Python modules. This path is relative starting from the prefix.]),
3642 [with_python_dir=$withval], [with_python_dir="no"])
3643 AC_MSG_RESULT(${with_python_dir})
3645 # Needed for installing Python modules during make install.
3646 python_mod_dir="${with_python_dir}"
3647 AC_SUBST(python_mod_dir)
3648 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
3649 ])
3651 dnl
3652 dnl Check to see if -Werror is disabled.
3653 dnl
3654 dnl --enable-werror/--disable-werror
3655 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
3656 AC_MSG_CHECKING([for -Werror])
3657 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
3658 AC_MSG_RESULT($enable_werror)
3659 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
3660 ])
3663 dnl
3664 dnl Check to see if sys/sdt.h exists and that it is suitable for use.
3665 dnl Some versions of sdt.h were not compatible with C++11.
3666 dnl
3667 AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
3668 AC_MSG_RESULT([for suitable sys/sdt.h])
3669 # Note that this test has to be run with the C language.
3670 # Otherwise, sdt.h will try to include some headers from
3671 # libstdc++ itself.
3672 AC_LANG_SAVE
3673 AC_LANG_C
3674 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
3675 # Because we have to run the test in C, we use grep rather
3676 # than the compiler to check for the bug. The bug is that
3677 # were strings without trailing whitespace, causing g++
3678 # to look for operator"". The pattern searches for the fixed
3679 # output.
3680 AC_EGREP_CPP([ \",\" ], [
3681 #include <sys/sdt.h>
3682 int f() { STAP_PROBE(hi, bob); }
3683 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
3684 ])
3685 AC_LANG_RESTORE
3686 if test $glibcxx_cv_sys_sdt_h = yes; then
3687 AC_DEFINE(HAVE_SYS_SDT_H, 1,
3688 [Define to 1 if you have a suitable <sys/sdt.h> header file])
3689 fi
3690 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
3691 ])
3693 # Macros from the top-level gcc directory.
3694 m4_include([../config/gc++filt.m4])
3695 m4_include([../config/tls.m4])
3696 m4_include([../config/gthr.m4])