| blob | ab26660782eee0aafc3a57ef76b8c07ec103d9d8 |
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 ac_save_CFLAGS="$CFLAGS"
182 CFLAGS="$CFLAGS -Wa,-nH"
184 AC_MSG_CHECKING([for as that supports -Wa,-nH])
185 AC_TRY_COMPILE([], [return 0;], [ac_hwcap_flags=yes],[ac_hwcap_flags=no])
186 if test "$ac_hwcap_flags" = "yes"; then
187 HWCAP_FLAGS="-Wa,-nH $HWCAP_FLAGS"
188 fi
189 AC_MSG_RESULT($ac_hwcap_flags)
191 CFLAGS="$ac_save_CFLAGS"
193 AC_SUBST(HWCAP_FLAGS)
194 ])
197 dnl
198 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
199 dnl the native linker is in use, all variables will be defined to something
200 dnl safe (like an empty string).
201 dnl
202 dnl Defines:
203 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
204 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
205 dnl LD (as a side effect of testing)
206 dnl Sets:
207 dnl with_gnu_ld
208 dnl glibcxx_ld_is_gold (set to "no" or "yes")
209 dnl glibcxx_gnu_ld_version (possibly)
210 dnl
211 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
212 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
213 dnl
214 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
215 # If we're not using GNU ld, then there's no point in even trying these
216 # tests. Check for that first. We should have already tested for gld
217 # by now (in libtool), but require it now just to be safe...
218 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
219 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
220 AC_REQUIRE([AC_PROG_LD])
221 AC_REQUIRE([AC_PROG_AWK])
223 # The name set by libtool depends on the version of libtool. Shame on us
224 # for depending on an impl detail, but c'est la vie. Older versions used
225 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
226 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
227 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
228 # set (hence we're using an older libtool), then set it.
229 if test x${with_gnu_ld+set} != xset; then
230 if test x${ac_cv_prog_gnu_ld+set} != xset; then
231 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
232 with_gnu_ld=no
233 else
234 with_gnu_ld=$ac_cv_prog_gnu_ld
235 fi
236 fi
238 # Start by getting the version number. I think the libtool test already
239 # does some of this, but throws away the result.
240 glibcxx_ld_is_gold=no
241 if test x"$with_gnu_ld" = x"yes"; then
242 AC_MSG_CHECKING([for ld version])
243 changequote(,)
244 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
245 glibcxx_ld_is_gold=yes
246 fi
247 ldver=`$LD --version 2>/dev/null |
248 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'`
249 changequote([,])
250 glibcxx_gnu_ld_version=`echo $ldver | \
251 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
252 AC_MSG_RESULT($glibcxx_gnu_ld_version)
253 fi
255 # Set --gc-sections.
256 glibcxx_have_gc_sections=no
257 if test "$glibcxx_ld_is_gold" = "yes"; then
258 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
259 glibcxx_have_gc_sections=yes
260 fi
261 else
262 glibcxx_gcsections_min_ld=21602
263 if test x"$with_gnu_ld" = x"yes" &&
264 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
265 glibcxx_have_gc_sections=yes
266 fi
267 fi
268 if test "$glibcxx_have_gc_sections" = "yes"; then
269 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
270 # NB: This flag only works reliably after 2.16.1. Configure tests
271 # for this are difficult, so hard wire a value that should work.
273 ac_test_CFLAGS="${CFLAGS+set}"
274 ac_save_CFLAGS="$CFLAGS"
275 CFLAGS='-Wl,--gc-sections'
277 # Check for -Wl,--gc-sections
278 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
279 AC_TRY_LINK([ int one(void) { return 1; }
280 int two(void) { return 2; }
281 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
282 if test "$ac_gcsections" = "yes"; then
283 rm -f conftest.c
284 touch conftest.c
285 if $CC -c conftest.c; then
286 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
287 grep "Warning: gc-sections option ignored" > /dev/null; then
288 ac_gcsections=no
289 fi
290 fi
291 rm -f conftest.c conftest.o conftest
292 fi
293 if test "$ac_gcsections" = "yes"; then
294 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
295 fi
296 AC_MSG_RESULT($ac_gcsections)
298 if test "$ac_test_CFLAGS" = set; then
299 CFLAGS="$ac_save_CFLAGS"
300 else
301 # this is the suspicious part
302 CFLAGS=''
303 fi
304 fi
306 # Set -z,relro.
307 # Note this is only for shared objects.
308 ac_ld_relro=no
309 if test x"$with_gnu_ld" = x"yes"; then
310 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
311 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
312 if test -n "$cxx_z_relo"; then
313 OPT_LDFLAGS="-Wl,-z,relro"
314 ac_ld_relro=yes
315 fi
316 AC_MSG_RESULT($ac_ld_relro)
317 fi
319 # Set linker optimization flags.
320 if test x"$with_gnu_ld" = x"yes"; then
321 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
322 fi
324 AC_SUBST(SECTION_LDFLAGS)
325 AC_SUBST(OPT_LDFLAGS)
326 ])
329 dnl
330 dnl Check for headers for, and arguments to, the setrlimit() function.
331 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
332 dnl
333 dnl Defines:
334 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
335 dnl various HAVE_LIMIT_* for individual limit names
336 dnl
337 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
338 AC_MSG_CHECKING([for RLIMIT_$1])
339 AC_TRY_COMPILE(
340 [#include <unistd.h>
341 #include <sys/time.h>
342 #include <sys/resource.h>
343 ],
344 [ int f = RLIMIT_$1 ; ],
345 [glibcxx_mresult=1], [glibcxx_mresult=0])
346 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
347 [Only used in build directory testsuite_hooks.h.])
348 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
349 AC_MSG_RESULT($res)
350 ])
352 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
353 setrlimit_have_headers=yes
354 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
355 [],
356 [setrlimit_have_headers=no])
357 # If don't have the headers, then we can't run the tests now, and we
358 # won't be seeing any of these during testsuite compilation.
359 if test $setrlimit_have_headers = yes; then
360 # Can't do these in a loop, else the resulting syntax is wrong.
361 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
362 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
363 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
364 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
365 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
367 # Check for rlimit, setrlimit.
368 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
369 AC_TRY_COMPILE(
370 [#include <unistd.h>
371 #include <sys/time.h>
372 #include <sys/resource.h>
373 ],
374 [struct rlimit r;
375 setrlimit(0, &r);],
376 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
377 ])
378 fi
380 AC_MSG_CHECKING([for testsuite resource limits support])
381 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
382 ac_res_limits=yes
383 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
384 [Define if using setrlimit to set resource limits during
385 "make check"])
386 else
387 ac_res_limits=no
388 fi
389 AC_MSG_RESULT($ac_res_limits)
390 ])
393 dnl
394 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
395 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
396 dnl
397 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
399 AC_LANG_SAVE
400 AC_LANG_CPLUSPLUS
401 ac_save_CXXFLAGS="$CXXFLAGS"
402 CXXFLAGS="$CXXFLAGS -fno-exceptions"
404 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
405 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
406 GCC_TRY_COMPILE_OR_LINK(
407 [#include <sys/stat.h>],
408 [struct stat buffer;
409 fstat(0, &buffer);
410 S_ISREG(buffer.st_mode);],
411 [glibcxx_cv_S_ISREG=yes],
412 [glibcxx_cv_S_ISREG=no])
413 ])
414 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
415 GCC_TRY_COMPILE_OR_LINK(
416 [#include <sys/stat.h>],
417 [struct stat buffer;
418 fstat(0, &buffer);
419 S_IFREG & buffer.st_mode;],
420 [glibcxx_cv_S_IFREG=yes],
421 [glibcxx_cv_S_IFREG=no])
422 ])
423 res=no
424 if test $glibcxx_cv_S_ISREG = yes; then
425 AC_DEFINE(HAVE_S_ISREG, 1,
426 [Define if S_IFREG is available in <sys/stat.h>.])
427 res=S_ISREG
428 elif test $glibcxx_cv_S_IFREG = yes; then
429 AC_DEFINE(HAVE_S_IFREG, 1,
430 [Define if S_IFREG is available in <sys/stat.h>.])
431 res=S_IFREG
432 fi
433 AC_MSG_RESULT($res)
435 CXXFLAGS="$ac_save_CXXFLAGS"
436 AC_LANG_RESTORE
437 ])
440 dnl
441 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
442 dnl
443 AC_DEFUN([GLIBCXX_CHECK_POLL], [
445 AC_LANG_SAVE
446 AC_LANG_CPLUSPLUS
447 ac_save_CXXFLAGS="$CXXFLAGS"
448 CXXFLAGS="$CXXFLAGS -fno-exceptions"
450 AC_MSG_CHECKING([for poll])
451 AC_CACHE_VAL(glibcxx_cv_POLL, [
452 GCC_TRY_COMPILE_OR_LINK(
453 [#include <poll.h>],
454 [struct pollfd pfd[1];
455 pfd[0].events = POLLIN;
456 poll(pfd, 1, 0);],
457 [glibcxx_cv_POLL=yes],
458 [glibcxx_cv_POLL=no])
459 ])
460 if test $glibcxx_cv_POLL = yes; then
461 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
462 fi
463 AC_MSG_RESULT($glibcxx_cv_POLL)
465 CXXFLAGS="$ac_save_CXXFLAGS"
466 AC_LANG_RESTORE
467 ])
470 dnl
471 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
472 dnl
473 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
475 AC_LANG_SAVE
476 AC_LANG_CPLUSPLUS
477 ac_save_CXXFLAGS="$CXXFLAGS"
478 CXXFLAGS="$CXXFLAGS -fno-exceptions"
480 AC_MSG_CHECKING([for writev])
481 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
482 GCC_TRY_COMPILE_OR_LINK(
483 [#include <sys/uio.h>],
484 [struct iovec iov[2];
485 writev(0, iov, 0);],
486 [glibcxx_cv_WRITEV=yes],
487 [glibcxx_cv_WRITEV=no])
488 ])
489 if test $glibcxx_cv_WRITEV = yes; then
490 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
491 fi
492 AC_MSG_RESULT($glibcxx_cv_WRITEV)
494 CXXFLAGS="$ac_save_CXXFLAGS"
495 AC_LANG_RESTORE
496 ])
499 dnl
500 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
501 dnl Also check whether int64_t is actually a typedef to long or long long.
502 dnl
503 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
505 AC_LANG_SAVE
506 AC_LANG_CPLUSPLUS
508 AC_MSG_CHECKING([for int64_t])
509 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
510 AC_TRY_COMPILE(
511 [#include <stdint.h>],
512 [int64_t var;],
513 [glibcxx_cv_INT64_T=yes],
514 [glibcxx_cv_INT64_T=no])
515 ])
517 if test $glibcxx_cv_INT64_T = yes; then
518 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
519 AC_MSG_RESULT($glibcxx_cv_INT64_T)
521 AC_MSG_CHECKING([for int64_t as long])
522 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
523 AC_TRY_COMPILE(
524 [#include <stdint.h>
525 template<typename, typename> struct same { enum { value = -1 }; };
526 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
527 int array[same<int64_t, long>::value];], [],
528 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
529 ])
531 if test $glibcxx_cv_int64_t_long = yes; then
532 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
533 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
534 fi
536 AC_MSG_CHECKING([for int64_t as long long])
537 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
538 AC_TRY_COMPILE(
539 [#include <stdint.h>
540 template<typename, typename> struct same { enum { value = -1 }; };
541 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
542 int array[same<int64_t, long long>::value];], [],
543 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
544 ])
546 if test $glibcxx_cv_int64_t_long_long = yes; then
547 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
548 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
549 fi
550 fi
552 AC_LANG_RESTORE
553 ])
556 dnl
557 dnl Check whether LFS support is available.
558 dnl
559 AC_DEFUN([GLIBCXX_CHECK_LFS], [
560 AC_LANG_SAVE
561 AC_LANG_CPLUSPLUS
562 ac_save_CXXFLAGS="$CXXFLAGS"
563 CXXFLAGS="$CXXFLAGS -fno-exceptions"
564 AC_MSG_CHECKING([for LFS support])
565 AC_CACHE_VAL(glibcxx_cv_LFS, [
566 GCC_TRY_COMPILE_OR_LINK(
567 [#include <unistd.h>
568 #include <stdio.h>
569 #include <sys/stat.h>
570 ],
571 [FILE* fp;
572 fopen64("t", "w");
573 fseeko64(fp, 0, SEEK_CUR);
574 ftello64(fp);
575 lseek64(1, 0, SEEK_CUR);
576 struct stat64 buf;
577 fstat64(1, &buf);],
578 [glibcxx_cv_LFS=yes],
579 [glibcxx_cv_LFS=no])
580 ])
581 if test $glibcxx_cv_LFS = yes; then
582 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
583 fi
584 AC_MSG_RESULT($glibcxx_cv_LFS)
585 CXXFLAGS="$ac_save_CXXFLAGS"
586 AC_LANG_RESTORE
587 ])
590 dnl
591 dnl Check for whether a fully dynamic basic_string implementation should
592 dnl be turned on, that does not put empty objects in per-process static
593 dnl memory (mostly useful together with shared memory allocators, see PR
594 dnl libstdc++/16612 for details).
595 dnl
596 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
597 dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
598 dnl otherwise undefined
599 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
600 dnl Where DEFAULT is either `yes' or `no'.
601 dnl
602 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
603 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
604 if test $enable_fully_dynamic_string = yes; then
605 enable_fully_dynamic_string_def=1
606 else
607 enable_fully_dynamic_string_def=0
608 fi
609 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
610 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
611 ])
614 dnl
615 dnl Does any necessary configuration of the testsuite directory. Generates
616 dnl the testsuite_hooks.h header.
617 dnl
618 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
619 dnl
620 dnl Sets:
621 dnl enable_abi_check
622 dnl GLIBCXX_TEST_WCHAR_T
623 dnl GLIBCXX_TEST_THREAD
624 dnl Substs:
625 dnl baseline_dir
626 dnl baseline_subdir_switch
627 dnl
628 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
629 if $GLIBCXX_IS_NATIVE ; then
630 # Do checks for resource limit functions.
631 GLIBCXX_CHECK_SETRLIMIT
633 # Look for setenv, so that extended locale tests can be performed.
634 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
635 fi
637 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
638 test $enable_symvers != no; then
639 case "$host" in
640 *-*-cygwin*)
641 enable_abi_check=no ;;
642 *)
643 enable_abi_check=yes ;;
644 esac
645 else
646 # Only build this as native, since automake does not understand
647 # CXX_FOR_BUILD.
648 enable_abi_check=no
649 fi
651 # Export file names for ABI checking.
652 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
653 AC_SUBST(baseline_dir)
654 baseline_subdir_switch="$abi_baseline_subdir_switch"
655 AC_SUBST(baseline_subdir_switch)
656 ])
659 dnl
660 dnl Does any necessary configuration for docbook in the docs directory.
661 dnl
662 dnl XSLTPROC must be set before this
663 dnl
664 dnl Sets:
665 dnl glibcxx_stylesheets
666 dnl Substs:
667 dnl XSL_STYLE_DIR
668 dnl
669 AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
671 AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
672 glibcxx_stylesheets=no
673 if test x${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
674 glibcxx_stylesheets=yes
675 fi
676 AC_MSG_RESULT($glibcxx_stylesheets)
678 AC_MSG_CHECKING([for local stylesheet directory])
679 glibcxx_local_stylesheets=no
680 if test x"$glibcxx_stylesheets" = x"yes"; then
681 if test -d /usr/share/sgml/docbook/xsl-ns-stylesheets; then
682 glibcxx_local_stylesheets=yes
683 XSL_STYLE_DIR=/usr/share/sgml/docbook/xsl-ns-stylesheets
684 fi
685 if test -d /usr/share/xml/docbook/stylesheet/docbook-xsl-ns; then
686 glibcxx_local_stylesheets=yes
687 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/docbook-xsl-ns
688 fi
689 fi
690 AC_MSG_RESULT($glibcxx_local_stylesheets)
692 if test x"$glibcxx_local_stylesheets" = x"yes"; then
693 AC_SUBST(XSL_STYLE_DIR)
694 AC_MSG_NOTICE($XSL_STYLE_DIR)
695 else
696 glibcxx_stylesheets=no
697 fi
699 # Check for epub3 dependencies.
700 AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
701 glibcxx_epub_stylesheets=no
702 if test x"$glibcxx_local_stylesheets" = x"yes"; then
703 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
704 glibcxx_epub_stylesheets=yes
705 fi
706 fi
707 AC_MSG_RESULT($glibcxx_epub_stylesheets)
708 AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
710 ])
713 dnl
714 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
715 dnl
716 dnl Substs:
717 dnl GLIBCXX_INCLUDES
718 dnl TOPLEVEL_INCLUDES
719 dnl
720 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
721 # Used for every C++ compile we perform.
722 GLIBCXX_INCLUDES="\
723 -I$glibcxx_builddir/include/$host_alias \
724 -I$glibcxx_builddir/include \
725 -I$glibcxx_srcdir/libsupc++"
727 # For Canadian crosses, pick this up too.
728 if test $CANADIAN = yes; then
729 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
730 fi
732 # Stuff in the actual top level. Currently only used by libsupc++ to
733 # get unwind* headers from the libgcc dir.
734 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
735 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
737 # Now, export this to all the little Makefiles....
738 AC_SUBST(GLIBCXX_INCLUDES)
739 AC_SUBST(TOPLEVEL_INCLUDES)
740 ])
743 dnl
744 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
745 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
746 dnl
747 dnl Substs:
748 dnl OPTIMIZE_CXXFLAGS
749 dnl WARN_FLAGS
750 dnl
751 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
752 # Optimization flags that are probably a good idea for thrill-seekers. Just
753 # uncomment the lines below and make, everything else is ready to go...
754 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
755 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
756 AC_SUBST(OPTIMIZE_CXXFLAGS)
758 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi'
759 AC_SUBST(WARN_FLAGS)
760 ])
763 dnl
764 dnl All installation directory information is determined here.
765 dnl
766 dnl Substs:
767 dnl gxx_install_dir
768 dnl glibcxx_prefixdir
769 dnl glibcxx_toolexecdir
770 dnl glibcxx_toolexeclibdir
771 dnl
772 dnl Assumes cross_compiling bits already done, and with_cross_host in
773 dnl particular.
774 dnl
775 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
776 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
777 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
778 glibcxx_toolexecdir=no
779 glibcxx_toolexeclibdir=no
780 glibcxx_prefixdir=$prefix
782 AC_MSG_CHECKING([for gxx-include-dir])
783 AC_ARG_WITH([gxx-include-dir],
784 AC_HELP_STRING([--with-gxx-include-dir=DIR],
785 [installation directory for include files]),
786 [case "$withval" in
787 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
788 no) gxx_include_dir=no ;;
789 *) gxx_include_dir=$withval ;;
790 esac],
791 [gxx_include_dir=no])
792 AC_MSG_RESULT($gxx_include_dir)
794 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
795 AC_ARG_ENABLE([version-specific-runtime-libs],
796 AC_HELP_STRING([--enable-version-specific-runtime-libs],
797 [Specify that runtime libraries should be installed in a compiler-specific directory]),
798 [case "$enableval" in
799 yes) version_specific_libs=yes ;;
800 no) version_specific_libs=no ;;
801 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
802 esac],
803 [version_specific_libs=no])
804 AC_MSG_RESULT($version_specific_libs)
806 # Default case for install directory for include files.
807 if test $version_specific_libs = no && test $gxx_include_dir = no; then
808 gxx_include_dir='include/c++/${gcc_version}'
809 if test -n "$with_cross_host" &&
810 test x"$with_cross_host" != x"no"; then
811 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
812 else
813 gxx_include_dir='${prefix}/'"$gxx_include_dir"
814 fi
815 fi
817 # Version-specific runtime libs processing.
818 if test $version_specific_libs = yes; then
819 # Need the gcc compiler version to know where to install libraries
820 # and header files if --enable-version-specific-runtime-libs option
821 # is selected. FIXME: these variables are misnamed, there are
822 # no executables installed in _toolexecdir or _toolexeclibdir.
823 if test x"$gxx_include_dir" = x"no"; then
824 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
825 fi
826 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
827 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
828 fi
830 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
831 # Install a library built with a cross compiler in tooldir, not libdir.
832 if test x"$glibcxx_toolexecdir" = x"no"; then
833 if test -n "$with_cross_host" &&
834 test x"$with_cross_host" != x"no"; then
835 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
836 glibcxx_toolexeclibdir='${toolexecdir}/lib'
837 else
838 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
839 glibcxx_toolexeclibdir='${libdir}'
840 fi
841 multi_os_directory=`$CXX -print-multi-os-directory`
842 case $multi_os_directory in
843 .) ;; # Avoid trailing /.
844 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
845 esac
846 fi
848 AC_MSG_CHECKING([for install location])
849 AC_MSG_RESULT($gxx_include_dir)
851 AC_SUBST(glibcxx_prefixdir)
852 AC_SUBST(gxx_include_dir)
853 AC_SUBST(glibcxx_toolexecdir)
854 AC_SUBST(glibcxx_toolexeclibdir)
855 ])
858 dnl
859 dnl GLIBCXX_ENABLE
860 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
861 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
862 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
863 dnl
864 dnl See docs/html/17_intro/configury.html#enable for documentation.
865 dnl
866 m4_define([GLIBCXX_ENABLE],[dnl
867 m4_define([_g_switch],[--enable-$1])dnl
868 m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
869 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
870 m4_bmatch([$5],
871 [^permit ],
872 [[
873 case "$enableval" in
874 m4_bpatsubst([$5],[permit ])) ;;
875 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
876 dnl Idea for future: generate a URL pointing to
877 dnl "onlinedocs/configopts.html#whatever"
878 esac
879 ]],
880 [^$],
881 [[
882 case "$enableval" in
883 yes|no) ;;
884 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
885 esac
886 ]],
887 [[$5]]),
888 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
889 m4_undefine([_g_switch])dnl
890 m4_undefine([_g_help])dnl
891 ])
894 dnl
895 dnl Check for ISO/IEC 9899:1999 "C99" support.
896 dnl
897 dnl --enable-c99 defines _GLIBCXX_USE_C99
898 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
899 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
900 dnl Where DEFAULT is either `yes' or `no'.
901 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
902 dnl
903 AC_DEFUN([GLIBCXX_ENABLE_C99], [
904 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
906 if test x"$enable_c99" = x"yes"; then
908 AC_LANG_SAVE
909 AC_LANG_CPLUSPLUS
911 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
912 # undefined and fake C99 facilities - like pre-standard snprintf - may be
913 # spuriously enabled.
914 # Long term, -std=c++0x could be even better, could manage to explicitely
915 # request C99 facilities to the underlying C headers.
916 ac_save_CXXFLAGS="$CXXFLAGS"
917 CXXFLAGS="$CXXFLAGS -std=c++98"
918 ac_save_LIBS="$LIBS"
919 ac_save_gcc_no_link="$gcc_no_link"
921 if test x$gcc_no_link != xyes; then
922 # Use -fno-exceptions to that the C driver can link these tests without
923 # hitting undefined references to personality routines.
924 CXXFLAGS="$CXXFLAGS -fno-exceptions"
925 AC_CHECK_LIB(m, sin, [
926 LIBS="$LIBS -lm"
927 ], [
928 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
929 gcc_no_link=yes
930 ])
931 fi
933 # Check for the existence of <math.h> functions used if C99 is enabled.
934 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
935 AC_CACHE_VAL(glibcxx_cv_c99_math, [
936 GCC_TRY_COMPILE_OR_LINK(
937 [#include <math.h>
938 volatile double d1, d2;
939 volatile int i;],
940 [i = fpclassify(d1);
941 i = isfinite(d1);
942 i = isinf(d1);
943 i = isnan(d1);
944 i = isnormal(d1);
945 i = signbit(d1);
946 i = isgreater(d1, d2);
947 i = isgreaterequal(d1, d2);
948 i = isless(d1, d2);
949 i = islessequal(d1, d2);
950 i = islessgreater(d1, d2);
951 i = islessgreater(d1, d2);
952 i = isunordered(d1, d2);
953 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
954 ])
955 AC_MSG_RESULT($glibcxx_cv_c99_math)
956 if test x"$glibcxx_cv_c99_math" = x"yes"; then
957 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
958 [Define if C99 functions or macros in <math.h> should be imported
959 in <cmath> in namespace std.])
960 fi
962 # Check for the existence of <complex.h> complex math functions.
963 # This is necessary even though libstdc++ uses the builtin versions
964 # of these functions, because if the builtin cannot be used, a reference
965 # to the library function is emitted.
966 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
967 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
968 glibcxx_cv_c99_complex=no;
969 if test x"$ac_has_complex_h" = x"yes"; then
970 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
971 GCC_TRY_COMPILE_OR_LINK(
972 [#include <complex.h>
973 typedef __complex__ float float_type;
974 typedef __complex__ double double_type;
975 typedef __complex__ long double ld_type;
976 volatile float_type tmpf;
977 volatile double_type tmpd;
978 volatile ld_type tmpld;
979 volatile float f;
980 volatile double d;
981 volatile long double ld;],
982 [f = cabsf(tmpf);
983 f = cargf(tmpf);
984 tmpf = ccosf(tmpf);
985 tmpf = ccoshf(tmpf);
986 tmpf = cexpf(tmpf);
987 tmpf = clogf(tmpf);
988 tmpf = csinf(tmpf);
989 tmpf = csinhf(tmpf);
990 tmpf = csqrtf(tmpf);
991 tmpf = ctanf(tmpf);
992 tmpf = ctanhf(tmpf);
993 tmpf = cpowf(tmpf, tmpf);
994 tmpf = cprojf(tmpf);
995 d = cabs(tmpd);
996 d = carg(tmpd);
997 tmpd = ccos(tmpd);
998 tmpd = ccosh(tmpd);
999 tmpd = cexp(tmpd);
1000 tmpd = clog(tmpd);
1001 tmpd = csin(tmpd);
1002 tmpd = csinh(tmpd);
1003 tmpd = csqrt(tmpd);
1004 tmpd = ctan(tmpd);
1005 tmpd = ctanh(tmpd);
1006 tmpd = cpow(tmpd, tmpd);
1007 tmpd = cproj(tmpd);
1008 ld = cabsl(tmpld);
1009 ld = cargl(tmpld);
1010 tmpld = ccosl(tmpld);
1011 tmpld = ccoshl(tmpld);
1012 tmpld = cexpl(tmpld);
1013 tmpld = clogl(tmpld);
1014 tmpld = csinl(tmpld);
1015 tmpld = csinhl(tmpld);
1016 tmpld = csqrtl(tmpld);
1017 tmpld = ctanl(tmpld);
1018 tmpld = ctanhl(tmpld);
1019 tmpld = cpowl(tmpld, tmpld);
1020 tmpld = cprojl(tmpld);
1021 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
1022 fi
1023 AC_MSG_RESULT($glibcxx_cv_c99_complex)
1024 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
1025 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
1026 [Define if C99 functions in <complex.h> should be used in
1027 <complex>. Using compiler builtins for these functions requires
1028 corresponding C99 library functions to be present.])
1029 fi
1031 # Check for the existence in <stdio.h> of vscanf, et. al.
1032 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
1033 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
1034 GCC_TRY_COMPILE_OR_LINK(
1035 [#include <stdio.h>
1036 #include <stdarg.h>
1037 void foo(char* fmt, ...)
1038 {
1039 va_list args; va_start(args, fmt);
1040 vfscanf(stderr, "%i", args);
1041 vscanf("%i", args);
1042 vsnprintf(fmt, 0, "%i", args);
1043 vsscanf(fmt, "%i", args);
1044 }],
1045 [snprintf("12", 0, "%i");],
1046 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
1047 ])
1048 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
1050 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1051 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
1052 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
1053 GCC_TRY_COMPILE_OR_LINK(
1054 [#include <stdlib.h>
1055 volatile float f;
1056 volatile long double ld;
1057 volatile unsigned long long ll;
1058 lldiv_t mydivt;],
1059 [char* tmp;
1060 f = strtof("gnu", &tmp);
1061 ld = strtold("gnu", &tmp);
1062 ll = strtoll("gnu", &tmp, 10);
1063 ll = strtoull("gnu", &tmp, 10);
1064 ll = llabs(10);
1065 mydivt = lldiv(10,1);
1066 ll = mydivt.quot;
1067 ll = mydivt.rem;
1068 ll = atoll("10");
1069 _Exit(0);
1070 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
1071 ])
1072 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
1074 # Check for the existence in <wchar.h> of wcstold, etc.
1075 glibcxx_cv_c99_wchar=no;
1076 if test x"$ac_has_wchar_h" = xyes &&
1077 test x"$ac_has_wctype_h" = xyes; then
1078 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
1079 AC_TRY_COMPILE([#include <wchar.h>
1080 namespace test
1081 {
1082 using ::wcstold;
1083 using ::wcstoll;
1084 using ::wcstoull;
1085 }
1086 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
1088 # Checks for wide character functions that may not be present.
1089 # Injection of these is wrapped with guard macros.
1090 # NB: only put functions here, instead of immediately above, if
1091 # absolutely necessary.
1092 AC_TRY_COMPILE([#include <wchar.h>
1093 namespace test { using ::vfwscanf; } ], [],
1094 [AC_DEFINE(HAVE_VFWSCANF,1,
1095 [Defined if vfwscanf exists.])],[])
1097 AC_TRY_COMPILE([#include <wchar.h>
1098 namespace test { using ::vswscanf; } ], [],
1099 [AC_DEFINE(HAVE_VSWSCANF,1,
1100 [Defined if vswscanf exists.])],[])
1102 AC_TRY_COMPILE([#include <wchar.h>
1103 namespace test { using ::vwscanf; } ], [],
1104 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
1106 AC_TRY_COMPILE([#include <wchar.h>
1107 namespace test { using ::wcstof; } ], [],
1108 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
1110 AC_TRY_COMPILE([#include <wctype.h>],
1111 [ wint_t t; int i = iswblank(t);],
1112 [AC_DEFINE(HAVE_ISWBLANK,1,
1113 [Defined if iswblank exists.])],[])
1115 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
1116 fi
1118 # Option parsed, now set things appropriately.
1119 if test x"$glibcxx_cv_c99_math" = x"no" ||
1120 test x"$glibcxx_cv_c99_complex" = x"no" ||
1121 test x"$glibcxx_cv_c99_stdio" = x"no" ||
1122 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
1123 test x"$glibcxx_cv_c99_wchar" = x"no"; then
1124 enable_c99=no;
1125 else
1126 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1127 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1128 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1129 fi
1131 gcc_no_link="$ac_save_gcc_no_link"
1132 LIBS="$ac_save_LIBS"
1133 CXXFLAGS="$ac_save_CXXFLAGS"
1134 AC_LANG_RESTORE
1135 fi
1137 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1138 AC_MSG_RESULT($enable_c99)
1139 ])
1142 dnl
1143 dnl Check for clock_gettime, nanosleep and sched_yield, used in the
1144 dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1145 dnl in the C++11 standard.
1146 dnl
1147 dnl --enable-libstdcxx-time
1148 dnl --enable-libstdcxx-time=yes
1149 dnl checks for the availability of monotonic and realtime clocks,
1150 dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
1151 dnl links in the latter.
1152 dnl --enable-libstdcxx-time=rt
1153 dnl also searches (and, if needed, links) librt. Note that this is
1154 dnl not always desirable because, in glibc, for example, in turn it
1155 dnl triggers the linking of libpthread too, which activates locking,
1156 dnl a large overhead for single-thread programs.
1157 dnl --enable-libstdcxx-time=no
1158 dnl --disable-libstdcxx-time
1159 dnl disables the checks completely
1160 dnl
1161 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
1163 AC_MSG_CHECKING([for clock_gettime, nanosleep and sched_yield])
1164 GLIBCXX_ENABLE(libstdcxx-time,$1,[[[=KIND]]],
1165 [use KIND for check type],
1166 [permit yes|no|rt])
1168 AC_LANG_SAVE
1169 AC_LANG_CPLUSPLUS
1170 ac_save_CXXFLAGS="$CXXFLAGS"
1171 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1172 ac_save_LIBS="$LIBS"
1174 ac_has_clock_monotonic=no
1175 ac_has_clock_realtime=no
1176 AC_MSG_RESULT($enable_libstdcxx_time)
1178 if test x"$enable_libstdcxx_time" != x"no"; then
1180 if test x"$enable_libstdcxx_time" = x"rt"; then
1181 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
1182 AC_SEARCH_LIBS(nanosleep, [rt posix4])
1183 else
1184 AC_SEARCH_LIBS(clock_gettime, [posix4])
1185 AC_SEARCH_LIBS(nanosleep, [posix4])
1186 fi
1188 case "$ac_cv_search_clock_gettime" in
1189 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
1190 ;;
1191 esac
1192 case "$ac_cv_search_nanosleep" in
1193 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1194 ;;
1195 esac
1197 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1199 case "$ac_cv_search_sched_yield" in
1200 -lposix4*)
1201 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1202 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1203 [ Defined if sched_yield is available. ])
1204 ;;
1205 -lrt*)
1206 if test x"$enable_libstdcxx_time" = x"rt"; then
1207 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
1208 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1209 [ Defined if sched_yield is available. ])
1210 fi
1211 ;;
1212 *)
1213 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1214 [ Defined if sched_yield is available. ])
1215 ;;
1216 esac
1218 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1220 if test x"$ac_has_unistd_h" = x"yes"; then
1221 AC_MSG_CHECKING([for monotonic clock])
1222 AC_TRY_LINK(
1223 [#include <unistd.h>
1224 #include <time.h>
1225 ],
1226 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1227 timespec tp;
1228 #endif
1229 clock_gettime(CLOCK_MONOTONIC, &tp);
1230 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1232 AC_MSG_RESULT($ac_has_clock_monotonic)
1234 AC_MSG_CHECKING([for realtime clock])
1235 AC_TRY_LINK(
1236 [#include <unistd.h>
1237 #include <time.h>
1238 ],
1239 [#if _POSIX_TIMERS > 0
1240 timespec tp;
1241 #endif
1242 clock_gettime(CLOCK_REALTIME, &tp);
1243 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1245 AC_MSG_RESULT($ac_has_clock_realtime)
1247 AC_MSG_CHECKING([for nanosleep])
1248 AC_TRY_LINK(
1249 [#include <unistd.h>
1250 #include <time.h>
1251 ],
1252 [#if _POSIX_TIMERS > 0
1253 timespec tp;
1254 #endif
1255 nanosleep(&tp, 0);
1256 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
1258 AC_MSG_RESULT($ac_has_nanosleep)
1259 fi
1260 fi
1262 if test x"$ac_has_clock_monotonic" = x"yes"; then
1263 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1264 [ Defined if clock_gettime has monotonic clock support. ])
1265 fi
1267 if test x"$ac_has_clock_realtime" = x"yes"; then
1268 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1269 [ Defined if clock_gettime has realtime clock support. ])
1270 fi
1272 if test x"$ac_has_nanosleep" = x"yes"; then
1273 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1274 [ Defined if nanosleep is available. ])
1275 fi
1277 AC_SUBST(GLIBCXX_LIBS)
1279 CXXFLAGS="$ac_save_CXXFLAGS"
1280 LIBS="$ac_save_LIBS"
1281 AC_LANG_RESTORE
1282 ])
1284 dnl
1285 dnl Check for gettimeofday, used in the implementation of 20.11.7
1286 dnl [time.clock] in the C++11 standard.
1287 dnl
1288 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1290 AC_MSG_CHECKING([for gettimeofday])
1292 AC_LANG_SAVE
1293 AC_LANG_CPLUSPLUS
1294 ac_save_CXXFLAGS="$CXXFLAGS"
1295 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1297 ac_has_gettimeofday=no;
1298 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1299 if test x"$ac_has_sys_time_h" = x"yes"; then
1300 AC_MSG_CHECKING([for gettimeofday])
1301 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
1302 [timeval tv; gettimeofday(&tv, 0);],
1303 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1305 AC_MSG_RESULT($ac_has_gettimeofday)
1306 fi
1308 if test x"$ac_has_gettimeofday" = x"yes"; then
1309 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1310 [ Defined if gettimeofday is available. ])
1311 fi
1313 CXXFLAGS="$ac_save_CXXFLAGS"
1314 AC_LANG_RESTORE
1315 ])
1317 dnl
1318 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1319 dnl facilities in Chapter 8, "C compatibility".
1320 dnl
1321 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1323 AC_LANG_SAVE
1324 AC_LANG_CPLUSPLUS
1326 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1327 # undefined and fake C99 facilities may be spuriously enabled.
1328 ac_save_CXXFLAGS="$CXXFLAGS"
1329 CXXFLAGS="$CXXFLAGS -std=c++98"
1331 # Check for the existence of <complex.h> complex math functions used
1332 # by tr1/complex.
1333 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1334 ac_c99_complex_tr1=no;
1335 if test x"$ac_has_complex_h" = x"yes"; then
1336 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1337 AC_TRY_COMPILE([#include <complex.h>],
1338 [typedef __complex__ float float_type; float_type tmpf;
1339 cacosf(tmpf);
1340 casinf(tmpf);
1341 catanf(tmpf);
1342 cacoshf(tmpf);
1343 casinhf(tmpf);
1344 catanhf(tmpf);
1345 typedef __complex__ double double_type; double_type tmpd;
1346 cacos(tmpd);
1347 casin(tmpd);
1348 catan(tmpd);
1349 cacosh(tmpd);
1350 casinh(tmpd);
1351 catanh(tmpd);
1352 typedef __complex__ long double ld_type; ld_type tmpld;
1353 cacosl(tmpld);
1354 casinl(tmpld);
1355 catanl(tmpld);
1356 cacoshl(tmpld);
1357 casinhl(tmpld);
1358 catanhl(tmpld);
1359 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1360 fi
1361 AC_MSG_RESULT($ac_c99_complex_tr1)
1362 if test x"$ac_c99_complex_tr1" = x"yes"; then
1363 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1364 [Define if C99 functions in <complex.h> should be used in
1365 <tr1/complex>. Using compiler builtins for these functions
1366 requires corresponding C99 library functions to be present.])
1367 fi
1369 # Check for the existence of <ctype.h> functions.
1370 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1371 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1372 AC_TRY_COMPILE([#include <ctype.h>],
1373 [int ch;
1374 int ret;
1375 ret = isblank(ch);
1376 ],[glibcxx_cv_c99_ctype_tr1=yes],
1377 [glibcxx_cv_c99_ctype_tr1=no])
1378 ])
1379 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1380 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1381 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1382 [Define if C99 functions in <ctype.h> should be imported in
1383 <tr1/cctype> in namespace std::tr1.])
1384 fi
1386 # Check for the existence of <fenv.h> functions.
1387 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1388 ac_c99_fenv_tr1=no;
1389 if test x"$ac_has_fenv_h" = x"yes"; then
1390 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1391 AC_TRY_COMPILE([#include <fenv.h>],
1392 [int except, mode;
1393 fexcept_t* pflag;
1394 fenv_t* penv;
1395 int ret;
1396 ret = feclearexcept(except);
1397 ret = fegetexceptflag(pflag, except);
1398 ret = feraiseexcept(except);
1399 ret = fesetexceptflag(pflag, except);
1400 ret = fetestexcept(except);
1401 ret = fegetround();
1402 ret = fesetround(mode);
1403 ret = fegetenv(penv);
1404 ret = feholdexcept(penv);
1405 ret = fesetenv(penv);
1406 ret = feupdateenv(penv);
1407 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1408 fi
1409 AC_MSG_RESULT($ac_c99_fenv_tr1)
1410 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1411 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1412 [Define if C99 functions in <fenv.h> should be imported in
1413 <tr1/cfenv> in namespace std::tr1.])
1414 fi
1416 # Check for the existence of <stdint.h> types.
1417 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1418 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1419 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
1420 #define __STDC_CONSTANT_MACROS
1421 #include <stdint.h>],
1422 [typedef int8_t my_int8_t;
1423 my_int8_t i8 = INT8_MIN;
1424 i8 = INT8_MAX;
1425 typedef int16_t my_int16_t;
1426 my_int16_t i16 = INT16_MIN;
1427 i16 = INT16_MAX;
1428 typedef int32_t my_int32_t;
1429 my_int32_t i32 = INT32_MIN;
1430 i32 = INT32_MAX;
1431 typedef int64_t my_int64_t;
1432 my_int64_t i64 = INT64_MIN;
1433 i64 = INT64_MAX;
1434 typedef int_fast8_t my_int_fast8_t;
1435 my_int_fast8_t if8 = INT_FAST8_MIN;
1436 if8 = INT_FAST8_MAX;
1437 typedef int_fast16_t my_int_fast16_t;
1438 my_int_fast16_t if16 = INT_FAST16_MIN;
1439 if16 = INT_FAST16_MAX;
1440 typedef int_fast32_t my_int_fast32_t;
1441 my_int_fast32_t if32 = INT_FAST32_MIN;
1442 if32 = INT_FAST32_MAX;
1443 typedef int_fast64_t my_int_fast64_t;
1444 my_int_fast64_t if64 = INT_FAST64_MIN;
1445 if64 = INT_FAST64_MAX;
1446 typedef int_least8_t my_int_least8_t;
1447 my_int_least8_t il8 = INT_LEAST8_MIN;
1448 il8 = INT_LEAST8_MAX;
1449 typedef int_least16_t my_int_least16_t;
1450 my_int_least16_t il16 = INT_LEAST16_MIN;
1451 il16 = INT_LEAST16_MAX;
1452 typedef int_least32_t my_int_least32_t;
1453 my_int_least32_t il32 = INT_LEAST32_MIN;
1454 il32 = INT_LEAST32_MAX;
1455 typedef int_least64_t my_int_least64_t;
1456 my_int_least64_t il64 = INT_LEAST64_MIN;
1457 il64 = INT_LEAST64_MAX;
1458 typedef intmax_t my_intmax_t;
1459 my_intmax_t im = INTMAX_MAX;
1460 im = INTMAX_MIN;
1461 typedef intptr_t my_intptr_t;
1462 my_intptr_t ip = INTPTR_MAX;
1463 ip = INTPTR_MIN;
1464 typedef uint8_t my_uint8_t;
1465 my_uint8_t ui8 = UINT8_MAX;
1466 ui8 = UINT8_MAX;
1467 typedef uint16_t my_uint16_t;
1468 my_uint16_t ui16 = UINT16_MAX;
1469 ui16 = UINT16_MAX;
1470 typedef uint32_t my_uint32_t;
1471 my_uint32_t ui32 = UINT32_MAX;
1472 ui32 = UINT32_MAX;
1473 typedef uint64_t my_uint64_t;
1474 my_uint64_t ui64 = UINT64_MAX;
1475 ui64 = UINT64_MAX;
1476 typedef uint_fast8_t my_uint_fast8_t;
1477 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1478 uif8 = UINT_FAST8_MAX;
1479 typedef uint_fast16_t my_uint_fast16_t;
1480 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1481 uif16 = UINT_FAST16_MAX;
1482 typedef uint_fast32_t my_uint_fast32_t;
1483 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1484 uif32 = UINT_FAST32_MAX;
1485 typedef uint_fast64_t my_uint_fast64_t;
1486 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1487 uif64 = UINT_FAST64_MAX;
1488 typedef uint_least8_t my_uint_least8_t;
1489 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1490 uil8 = UINT_LEAST8_MAX;
1491 typedef uint_least16_t my_uint_least16_t;
1492 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1493 uil16 = UINT_LEAST16_MAX;
1494 typedef uint_least32_t my_uint_least32_t;
1495 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1496 uil32 = UINT_LEAST32_MAX;
1497 typedef uint_least64_t my_uint_least64_t;
1498 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1499 uil64 = UINT_LEAST64_MAX;
1500 typedef uintmax_t my_uintmax_t;
1501 my_uintmax_t uim = UINTMAX_MAX;
1502 uim = UINTMAX_MAX;
1503 typedef uintptr_t my_uintptr_t;
1504 my_uintptr_t uip = UINTPTR_MAX;
1505 uip = UINTPTR_MAX;
1506 ],[glibcxx_cv_c99_stdint_tr1=yes],
1507 [glibcxx_cv_c99_stdint_tr1=no])
1508 ])
1509 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1510 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1511 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1512 [Define if C99 types in <stdint.h> should be imported in
1513 <tr1/cstdint> in namespace std::tr1.])
1514 fi
1516 # Check for the existence of <math.h> functions.
1517 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1518 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1519 AC_TRY_COMPILE([#include <math.h>],
1520 [typedef double_t my_double_t;
1521 typedef float_t my_float_t;
1522 acosh(0.0);
1523 acoshf(0.0f);
1524 acoshl(0.0l);
1525 asinh(0.0);
1526 asinhf(0.0f);
1527 asinhl(0.0l);
1528 atanh(0.0);
1529 atanhf(0.0f);
1530 atanhl(0.0l);
1531 cbrt(0.0);
1532 cbrtf(0.0f);
1533 cbrtl(0.0l);
1534 copysign(0.0, 0.0);
1535 copysignf(0.0f, 0.0f);
1536 copysignl(0.0l, 0.0l);
1537 erf(0.0);
1538 erff(0.0f);
1539 erfl(0.0l);
1540 erfc(0.0);
1541 erfcf(0.0f);
1542 erfcl(0.0l);
1543 exp2(0.0);
1544 exp2f(0.0f);
1545 exp2l(0.0l);
1546 expm1(0.0);
1547 expm1f(0.0f);
1548 expm1l(0.0l);
1549 fdim(0.0, 0.0);
1550 fdimf(0.0f, 0.0f);
1551 fdiml(0.0l, 0.0l);
1552 fma(0.0, 0.0, 0.0);
1553 fmaf(0.0f, 0.0f, 0.0f);
1554 fmal(0.0l, 0.0l, 0.0l);
1555 fmax(0.0, 0.0);
1556 fmaxf(0.0f, 0.0f);
1557 fmaxl(0.0l, 0.0l);
1558 fmin(0.0, 0.0);
1559 fminf(0.0f, 0.0f);
1560 fminl(0.0l, 0.0l);
1561 hypot(0.0, 0.0);
1562 hypotf(0.0f, 0.0f);
1563 hypotl(0.0l, 0.0l);
1564 ilogb(0.0);
1565 ilogbf(0.0f);
1566 ilogbl(0.0l);
1567 lgamma(0.0);
1568 lgammaf(0.0f);
1569 lgammal(0.0l);
1570 llrint(0.0);
1571 llrintf(0.0f);
1572 llrintl(0.0l);
1573 llround(0.0);
1574 llroundf(0.0f);
1575 llroundl(0.0l);
1576 log1p(0.0);
1577 log1pf(0.0f);
1578 log1pl(0.0l);
1579 log2(0.0);
1580 log2f(0.0f);
1581 log2l(0.0l);
1582 logb(0.0);
1583 logbf(0.0f);
1584 logbl(0.0l);
1585 lrint(0.0);
1586 lrintf(0.0f);
1587 lrintl(0.0l);
1588 lround(0.0);
1589 lroundf(0.0f);
1590 lroundl(0.0l);
1591 nan(0);
1592 nanf(0);
1593 nanl(0);
1594 nearbyint(0.0);
1595 nearbyintf(0.0f);
1596 nearbyintl(0.0l);
1597 nextafter(0.0, 0.0);
1598 nextafterf(0.0f, 0.0f);
1599 nextafterl(0.0l, 0.0l);
1600 nexttoward(0.0, 0.0);
1601 nexttowardf(0.0f, 0.0f);
1602 nexttowardl(0.0l, 0.0l);
1603 remainder(0.0, 0.0);
1604 remainderf(0.0f, 0.0f);
1605 remainderl(0.0l, 0.0l);
1606 remquo(0.0, 0.0, 0);
1607 remquof(0.0f, 0.0f, 0);
1608 remquol(0.0l, 0.0l, 0);
1609 rint(0.0);
1610 rintf(0.0f);
1611 rintl(0.0l);
1612 round(0.0);
1613 roundf(0.0f);
1614 roundl(0.0l);
1615 scalbln(0.0, 0l);
1616 scalblnf(0.0f, 0l);
1617 scalblnl(0.0l, 0l);
1618 scalbn(0.0, 0);
1619 scalbnf(0.0f, 0);
1620 scalbnl(0.0l, 0);
1621 tgamma(0.0);
1622 tgammaf(0.0f);
1623 tgammal(0.0l);
1624 trunc(0.0);
1625 truncf(0.0f);
1626 truncl(0.0l);
1627 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1628 ])
1629 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1630 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1631 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1632 [Define if C99 functions or macros in <math.h> should be imported
1633 in <tr1/cmath> in namespace std::tr1.])
1634 fi
1636 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1637 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1638 ac_c99_inttypes_tr1=no;
1639 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1640 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1641 AC_TRY_COMPILE([#include <inttypes.h>],
1642 [intmax_t i, numer, denom, base;
1643 const char* s;
1644 char** endptr;
1645 intmax_t ret = imaxabs(i);
1646 imaxdiv_t dret = imaxdiv(numer, denom);
1647 ret = strtoimax(s, endptr, base);
1648 uintmax_t uret = strtoumax(s, endptr, base);
1649 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1650 fi
1651 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1652 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1653 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1654 [Define if C99 functions in <inttypes.h> should be imported in
1655 <tr1/cinttypes> in namespace std::tr1.])
1656 fi
1658 # Check for the existence of whcar_t <inttypes.h> functions (NB: doesn't
1659 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1660 ac_c99_inttypes_wchar_t_tr1=no;
1661 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1662 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1663 AC_TRY_COMPILE([#include <inttypes.h>],
1664 [intmax_t base;
1665 const wchar_t* s;
1666 wchar_t** endptr;
1667 intmax_t ret = wcstoimax(s, endptr, base);
1668 uintmax_t uret = wcstoumax(s, endptr, base);
1669 ],[ac_c99_inttypes_wchar_t_tr1=yes],
1670 [ac_c99_inttypes_wchar_t_tr1=no])
1671 fi
1672 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1673 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
1674 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
1675 [Define if wchar_t C99 functions in <inttypes.h> should be
1676 imported in <tr1/cinttypes> in namespace std::tr1.])
1677 fi
1679 # Check for the existence of the <stdbool.h> header.
1680 AC_CHECK_HEADERS(stdbool.h)
1682 # Check for the existence of the <stdalign.h> header.
1683 AC_CHECK_HEADERS(stdalign.h)
1685 CXXFLAGS="$ac_save_CXXFLAGS"
1686 AC_LANG_RESTORE
1687 ])
1689 dnl
1690 dnl Check whether "/dev/random" and "/dev/urandom" are available for the
1691 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1692 dnl
1693 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1695 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
1696 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1697 if test -r /dev/random && test -r /dev/urandom; then
1698 glibcxx_cv_random_tr1=yes;
1699 else
1700 glibcxx_cv_random_tr1=no;
1701 fi
1702 ])
1703 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1705 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1706 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1707 [Define if /dev/random and /dev/urandom are available for
1708 the random_device of TR1 (Chapter 5.1).])
1709 fi
1711 ])
1713 dnl
1714 dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
1715 dnl
1716 AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
1718 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
1719 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
1720 [#include <stdio.h>],
1721 [AC_MSG_ERROR([computing EOF failed])])
1722 ])
1723 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
1724 [Define to the value of the EOF integer constant.])
1726 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
1727 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
1728 [#include <stdio.h>],
1729 [AC_MSG_ERROR([computing SEEK_CUR failed])])
1730 ])
1731 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
1732 [Define to the value of the SEEK_CUR integer constant.])
1734 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
1735 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
1736 [#include <stdio.h>],
1737 [AC_MSG_ERROR([computing SEEK_END failed])])
1738 ])
1739 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
1740 [Define to the value of the SEEK_END integer constant.])
1741 ])
1743 dnl
1744 dnl Check whether required C++ overloads are present in <stdio.h>.
1745 dnl
1746 AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
1748 AC_LANG_SAVE
1749 AC_LANG_CPLUSPLUS
1751 AC_MSG_CHECKING([for gets declaration])
1752 AC_CACHE_VAL(glibcxx_cv_gets, [
1753 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
1754 [#include <stdio.h>
1755 namespace test
1756 {
1757 using ::gets;
1758 }
1759 ])],
1760 [glibcxx_cv_gets=yes],
1761 [glibcxx_cv_gets=no]
1762 )])
1764 if test $glibcxx_cv_gets = yes; then
1765 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h>.])
1766 fi
1767 AC_MSG_RESULT($glibcxx_cv_gets)
1769 AC_LANG_RESTORE
1770 ])
1772 dnl
1773 dnl Check whether macros, etc are present for <system_error>
1774 dnl
1775 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1777 m4_pushdef([n_syserr], [1])dnl
1778 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1779 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1780 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
1781 ECHILD, ENOSPC, EPERM,
1782 ETIMEDOUT, EWOULDBLOCK],
1783 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1784 AC_MSG_CHECKING([for syserr])
1785 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1786 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1787 [int i = syserr;])],
1788 [glibcxx_cv_system_error[]n_syserr=yes],
1789 [glibcxx_cv_system_error[]n_syserr=no])
1790 ])
1791 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1792 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1793 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1794 fi
1795 m4_define([n_syserr], m4_incr(n_syserr))dnl
1796 m4_popdef([SYSERR])dnl
1797 ])
1798 m4_popdef([n_syserr])dnl
1799 ])
1801 dnl
1802 dnl Check for what type of C headers to use.
1803 dnl
1804 dnl --enable-cheaders= [does stuff].
1805 dnl --disable-cheaders [does not do anything, really].
1806 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1807 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1808 dnl
1809 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1810 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
1811 [construct "C" headers for g++], [permit c|c_std|c_global])
1812 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1814 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1816 # Allow overrides to configure.host here.
1817 if test $enable_cheaders = c_global; then
1818 c_compatibility=yes
1819 fi
1821 AC_SUBST(C_INCLUDE_DIR)
1822 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1823 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1824 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1825 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1826 ])
1829 dnl
1830 dnl Check for which locale library to use. The choice is mapped to
1831 dnl a subdirectory of config/locale.
1832 dnl
1833 dnl Default is generic.
1834 dnl
1835 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1836 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
1837 [use MODEL for target locale package],
1838 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
1840 # Deal with gettext issues. Default to not using it (=no) until we detect
1841 # support for it later. Let the user turn it off via --e/d, but let that
1842 # default to on for easier handling.
1843 USE_NLS=no
1844 AC_ARG_ENABLE(nls,
1845 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1846 [],
1847 [enable_nls=yes])
1849 # Either a known package, or "auto"
1850 if test $enable_clocale = no || test $enable_clocale = yes; then
1851 enable_clocale=auto
1852 fi
1853 enable_clocale_flag=$enable_clocale
1855 # Probe for locale model to use if none specified.
1856 # Default to "generic".
1857 if test $enable_clocale_flag = auto; then
1858 case ${target_os} in
1859 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1860 enable_clocale_flag=gnu
1861 ;;
1862 darwin* | freebsd*)
1863 enable_clocale_flag=darwin
1864 ;;
1865 *)
1866 if test x"$with_newlib" = x"yes"; then
1867 enable_clocale_flag=newlib
1868 else
1869 enable_clocale_flag=generic
1870 fi
1871 ;;
1872 esac
1873 fi
1875 # Sanity check model, and test for special functionality.
1876 if test $enable_clocale_flag = gnu; then
1877 AC_EGREP_CPP([_GLIBCXX_ok], [
1878 #include <features.h>
1879 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
1880 _GLIBCXX_ok
1881 #endif
1882 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1884 # Set it to scream when it hurts.
1885 ac_save_CFLAGS="$CFLAGS"
1886 CFLAGS="-Wimplicit-function-declaration -Werror"
1888 # Use strxfrm_l if available.
1889 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1890 #include <string.h>
1891 #include <locale.h>],
1892 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1893 AC_DEFINE(HAVE_STRXFRM_L, 1,
1894 [Define if strxfrm_l is available in <string.h>.]),)
1896 # Use strerror_l if available.
1897 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1898 #include <string.h>
1899 #include <locale.h>],
1900 [__locale_t loc; strerror_l(5, loc);],
1901 AC_DEFINE(HAVE_STRERROR_L, 1,
1902 [Define if strerror_l is available in <string.h>.]),)
1904 CFLAGS="$ac_save_CFLAGS"
1905 fi
1907 # Perhaps use strerror_r if available, and strerror_l isn't.
1908 ac_save_CFLAGS="$CFLAGS"
1909 CFLAGS="-Wimplicit-function-declaration -Werror"
1910 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1911 #include <string.h>
1912 #include <locale.h>],
1913 [char s[128]; strerror_r(5, s, 128);],
1914 AC_DEFINE(HAVE_STRERROR_R, 1,
1915 [Define if strerror_r is available in <string.h>.]),)
1916 CFLAGS="$ac_save_CFLAGS"
1918 # Set configure bits for specified locale package
1919 AC_MSG_CHECKING([for C locale to use])
1920 case ${enable_clocale_flag} in
1921 generic)
1922 AC_MSG_RESULT(generic)
1924 CLOCALE_H=config/locale/generic/c_locale.h
1925 CLOCALE_CC=config/locale/generic/c_locale.cc
1926 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1927 CCOLLATE_CC=config/locale/generic/collate_members.cc
1928 CCTYPE_CC=config/locale/generic/ctype_members.cc
1929 CMESSAGES_H=config/locale/generic/messages_members.h
1930 CMESSAGES_CC=config/locale/generic/messages_members.cc
1931 CMONEY_CC=config/locale/generic/monetary_members.cc
1932 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1933 CTIME_H=config/locale/generic/time_members.h
1934 CTIME_CC=config/locale/generic/time_members.cc
1935 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1936 ;;
1937 darwin)
1938 AC_MSG_RESULT(darwin or freebsd)
1940 CLOCALE_H=config/locale/generic/c_locale.h
1941 CLOCALE_CC=config/locale/generic/c_locale.cc
1942 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1943 CCOLLATE_CC=config/locale/generic/collate_members.cc
1944 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1945 CMESSAGES_H=config/locale/generic/messages_members.h
1946 CMESSAGES_CC=config/locale/generic/messages_members.cc
1947 CMONEY_CC=config/locale/generic/monetary_members.cc
1948 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1949 CTIME_H=config/locale/generic/time_members.h
1950 CTIME_CC=config/locale/generic/time_members.cc
1951 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1952 ;;
1954 gnu)
1955 AC_MSG_RESULT(gnu)
1957 # Declare intention to use gettext, and add support for specific
1958 # languages.
1959 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1960 ALL_LINGUAS="de fr"
1962 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1963 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1964 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1965 USE_NLS=yes
1966 fi
1967 # Export the build objects.
1968 for ling in $ALL_LINGUAS; do \
1969 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1970 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1971 done
1972 AC_SUBST(glibcxx_MOFILES)
1973 AC_SUBST(glibcxx_POFILES)
1975 CLOCALE_H=config/locale/gnu/c_locale.h
1976 CLOCALE_CC=config/locale/gnu/c_locale.cc
1977 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1978 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1979 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1980 CMESSAGES_H=config/locale/gnu/messages_members.h
1981 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1982 CMONEY_CC=config/locale/gnu/monetary_members.cc
1983 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1984 CTIME_H=config/locale/gnu/time_members.h
1985 CTIME_CC=config/locale/gnu/time_members.cc
1986 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1987 ;;
1988 ieee_1003.1-2001)
1989 AC_MSG_RESULT(IEEE 1003.1)
1991 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1992 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1993 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1994 CCOLLATE_CC=config/locale/generic/collate_members.cc
1995 CCTYPE_CC=config/locale/generic/ctype_members.cc
1996 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1997 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1998 CMONEY_CC=config/locale/generic/monetary_members.cc
1999 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2000 CTIME_H=config/locale/generic/time_members.h
2001 CTIME_CC=config/locale/generic/time_members.cc
2002 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2003 ;;
2004 newlib)
2005 AC_MSG_RESULT(newlib)
2007 CLOCALE_H=config/locale/generic/c_locale.h
2008 CLOCALE_CC=config/locale/generic/c_locale.cc
2009 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2010 CCOLLATE_CC=config/locale/generic/collate_members.cc
2011 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2012 CMESSAGES_H=config/locale/generic/messages_members.h
2013 CMESSAGES_CC=config/locale/generic/messages_members.cc
2014 CMONEY_CC=config/locale/generic/monetary_members.cc
2015 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2016 CTIME_H=config/locale/generic/time_members.h
2017 CTIME_CC=config/locale/generic/time_members.cc
2018 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2019 ;;
2020 esac
2022 # This is where the testsuite looks for locale catalogs, using the
2023 # -DLOCALEDIR define during testsuite compilation.
2024 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2025 AC_SUBST(glibcxx_localedir)
2027 # A standalone libintl (e.g., GNU libintl) may be in use.
2028 if test $USE_NLS = yes; then
2029 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2030 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2031 fi
2032 if test $USE_NLS = yes; then
2033 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2034 [Define if NLS translations are to be used.])
2035 fi
2037 AC_SUBST(USE_NLS)
2038 AC_SUBST(CLOCALE_H)
2039 AC_SUBST(CMESSAGES_H)
2040 AC_SUBST(CCODECVT_CC)
2041 AC_SUBST(CCOLLATE_CC)
2042 AC_SUBST(CCTYPE_CC)
2043 AC_SUBST(CMESSAGES_CC)
2044 AC_SUBST(CMONEY_CC)
2045 AC_SUBST(CNUMERIC_CC)
2046 AC_SUBST(CTIME_H)
2047 AC_SUBST(CTIME_CC)
2048 AC_SUBST(CLOCALE_CC)
2049 AC_SUBST(CLOCALE_INTERNAL_H)
2050 ])
2053 dnl
2054 dnl Check for which std::allocator base class to use. The choice is
2055 dnl mapped from a subdirectory of include/ext.
2056 dnl
2057 dnl Default is new.
2058 dnl
2059 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
2060 AC_MSG_CHECKING([for std::allocator base class])
2061 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
2062 [use KIND for target std::allocator base],
2063 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
2065 # If they didn't use this option switch, or if they specified --enable
2066 # with no specific model, we'll have to look for one. If they
2067 # specified --disable (???), do likewise.
2068 if test $enable_libstdcxx_allocator = no ||
2069 test $enable_libstdcxx_allocator = yes;
2070 then
2071 enable_libstdcxx_allocator=auto
2072 fi
2074 # Either a known package, or "auto". Auto implies the default choice
2075 # for a particular platform.
2076 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2078 # Probe for host-specific support if no specific model is specified.
2079 # Default to "new".
2080 if test $enable_libstdcxx_allocator_flag = auto; then
2081 case ${target_os} in
2082 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
2083 enable_libstdcxx_allocator_flag=new
2084 ;;
2085 *)
2086 enable_libstdcxx_allocator_flag=new
2087 ;;
2088 esac
2089 fi
2090 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
2093 # Set configure bits for specified locale package
2094 case ${enable_libstdcxx_allocator_flag} in
2095 bitmap)
2096 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2097 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2098 ;;
2099 malloc)
2100 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2101 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2102 ;;
2103 mt)
2104 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2105 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2106 ;;
2107 new)
2108 ALLOCATOR_H=config/allocator/new_allocator_base.h
2109 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2110 ;;
2111 pool)
2112 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2113 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
2114 ;;
2115 esac
2117 AC_SUBST(ALLOCATOR_H)
2118 AC_SUBST(ALLOCATOR_NAME)
2119 ])
2122 dnl
2123 dnl Check for whether the Boost-derived checks should be turned on.
2124 dnl
2125 dnl --enable-concept-checks turns them on.
2126 dnl --disable-concept-checks leaves them off.
2127 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2128 dnl Where DEFAULT is either `yes' or `no'.
2129 dnl
2130 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
2131 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2132 if test $enable_concept_checks = yes; then
2133 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
2134 [Define to use concept checking code from the boost libraries.])
2135 fi
2136 ])
2138 dnl
2139 dnl Use extern templates.
2140 dnl
2141 dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2142 dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2144 dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2145 dnl Where DEFAULT is `yes' or `no'.
2146 dnl
2147 AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2149 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2151 AC_MSG_CHECKING([for extern template support])
2152 AC_MSG_RESULT([$enable_extern_template])
2154 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2155 ])
2157 dnl
2158 dnl Check for parallel mode pre-requisites, including OpenMP support.
2159 dnl
2160 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2161 dnl
2162 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2164 enable_parallel=no;
2166 # See if configured libgomp/omp.h exists. (libgomp may be in
2167 # noconfigdirs but not explicitly disabled.)
2168 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
2169 enable_parallel=yes;
2170 else
2171 AC_MSG_NOTICE([target-libgomp not built])
2172 fi
2174 AC_MSG_CHECKING([for parallel mode support])
2175 AC_MSG_RESULT([$enable_parallel])
2176 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
2177 ])
2180 dnl
2181 dnl Check for which I/O library to use: stdio, or something specific.
2182 dnl
2183 dnl Default is stdio.
2184 dnl
2185 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
2186 AC_MSG_CHECKING([for underlying I/O to use])
2187 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
2188 [use target-specific I/O package], [permit stdio])
2190 # Now that libio has been removed, you can have any color you want as long
2191 # as it's black. This is one big no-op until other packages are added, but
2192 # showing the framework never hurts.
2193 case ${enable_cstdio} in
2194 stdio)
2195 CSTDIO_H=config/io/c_io_stdio.h
2196 BASIC_FILE_H=config/io/basic_file_stdio.h
2197 BASIC_FILE_CC=config/io/basic_file_stdio.cc
2198 AC_MSG_RESULT(stdio)
2199 ;;
2200 esac
2202 AC_SUBST(CSTDIO_H)
2203 AC_SUBST(BASIC_FILE_H)
2204 AC_SUBST(BASIC_FILE_CC)
2205 ])
2208 dnl
2209 dnl Check for "unusual" flags to pass to the compiler while building.
2210 dnl
2211 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2212 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2213 dnl --disable-cxx-flags passes nothing.
2214 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2215 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2216 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2217 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2218 dnl If "default flags" is an empty string, the effect is the same
2219 dnl as --disable or --enable=no.
2220 dnl
2221 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
2222 AC_MSG_CHECKING([for extra compiler flags for building])
2223 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2224 [pass compiler FLAGS when building library],
2225 [case "x$enable_cxx_flags" in
2226 xno | x) enable_cxx_flags= ;;
2227 x-*) ;;
2228 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2229 esac])
2231 # Run through flags (either default or command-line) and set anything
2232 # extra (e.g., #defines) that must accompany particular g++ options.
2233 if test -n "$enable_cxx_flags"; then
2234 for f in $enable_cxx_flags; do
2235 case "$f" in
2236 -fhonor-std) ;;
2237 -*) ;;
2238 *) # and we're trying to pass /what/ exactly?
2239 AC_MSG_ERROR([compiler flags start with a -]) ;;
2240 esac
2241 done
2242 fi
2244 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2245 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2246 AC_SUBST(EXTRA_CXX_FLAGS)
2247 ])
2250 dnl
2251 dnl Check to see if debugging libraries are to be built.
2252 dnl
2253 dnl --enable-libstdcxx-debug
2254 dnl builds a separate set of debugging libraries in addition to the
2255 dnl normal (shared, static) libstdc++ binaries.
2256 dnl
2257 dnl --disable-libstdcxx-debug
2258 dnl builds only one (non-debug) version of libstdc++.
2259 dnl
2260 dnl --enable-libstdcxx-debug-flags=FLAGS
2261 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2262 dnl
2263 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2264 dnl Where DEFAULT is either `yes' or `no'.
2265 dnl
2266 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
2267 AC_MSG_CHECKING([for additional debug build])
2268 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2269 AC_MSG_RESULT($enable_libstdcxx_debug)
2270 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
2271 ])
2274 dnl
2275 dnl Check for explicit debug flags.
2276 dnl
2277 dnl --enable-libstdcxx-debug-flags='-O1'
2278 dnl is a general method for passing flags to be used when
2279 dnl building debug libraries with --enable-debug.
2280 dnl
2281 dnl --disable-libstdcxx-debug-flags does nothing.
2282 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2283 dnl If "default flags" is an empty string, the effect is the same
2284 dnl as --disable or --enable=no.
2285 dnl
2286 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
2287 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2288 [pass compiler FLAGS when building debug library],
2289 [case "x$enable_libstdcxx_debug_flags" in
2290 xno | x) enable_libstdcxx_debug_flags= ;;
2291 x-*) ;;
2292 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2293 esac])
2295 # Option parsed, now set things appropriately
2296 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2297 AC_SUBST(DEBUG_FLAGS)
2299 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
2300 ])
2303 dnl
2304 dnl Check if the user only wants a freestanding library implementation.
2305 dnl
2306 dnl --disable-hosted-libstdcxx will turn off most of the library build,
2307 dnl installing only the headers required by [17.4.1.3] and the language
2308 dnl support library. More than that will be built (to keep the Makefiles
2309 dnl conveniently clean), but not installed.
2310 dnl
2311 dnl Sets:
2312 dnl is_hosted (yes/no)
2313 dnl
2314 dnl Defines:
2315 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2316 dnl
2317 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
2318 AC_ARG_ENABLE([hosted-libstdcxx],
2319 AC_HELP_STRING([--disable-hosted-libstdcxx],
2320 [only build freestanding C++ runtime support]),,
2321 [case "$host" in
2322 arm*-*-symbianelf*)
2323 enable_hosted_libstdcxx=no
2324 ;;
2325 *)
2326 enable_hosted_libstdcxx=yes
2327 ;;
2328 esac])
2329 if test "$enable_hosted_libstdcxx" = no; then
2330 AC_MSG_NOTICE([Only freestanding libraries will be built])
2331 is_hosted=no
2332 hosted_define=0
2333 enable_abi_check=no
2334 enable_libstdcxx_pch=no
2335 else
2336 is_hosted=yes
2337 hosted_define=1
2338 fi
2339 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2340 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2341 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2342 ])
2345 dnl
2346 dnl Check if the user wants a non-verbose library implementation.
2347 dnl
2348 dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2349 dnl standard error on termination.
2350 dnl
2351 dnl Defines:
2352 dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2353 dnl
2354 AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2355 AC_ARG_ENABLE([libstdcxx-verbose],
2356 AC_HELP_STRING([--disable-libstdcxx-verbose],
2357 [disable termination messages to standard error]),,
2358 [enable_libstdcxx_verbose=yes])
2359 if test x"$enable_libstdcxx_verbose" = xyes; then
2360 verbose_define=1
2361 else
2362 AC_MSG_NOTICE([verbose termination messages are disabled])
2363 verbose_define=0
2364 fi
2365 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
2366 [Define to 1 if a verbose library is built, or 0 otherwise.])
2367 ])
2370 dnl
2371 dnl Check for template specializations for the 'long long' type.
2372 dnl The result determines only whether 'long long' I/O is enabled; things
2373 dnl like numeric_limits<> specializations are always available.
2374 dnl
2375 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2376 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2377 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2378 dnl Where DEFAULT is either `yes' or `no'.
2379 dnl
2380 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2381 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2382 if test $enable_long_long = yes; then
2383 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2384 [Define if code specialized for long long should be used.])
2385 fi
2386 AC_MSG_CHECKING([for enabled long long specializations])
2387 AC_MSG_RESULT([$enable_long_long])
2388 ])
2391 dnl
2392 dnl Check for decimal floating point.
2393 dnl See:
2394 dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2395 dnl
2396 dnl This checks to see if the host supports decimal floating point types.
2397 dnl
2398 dnl Defines:
2399 dnl _GLIBCXX_USE_DECIMAL_FLOAT
2400 dnl
2401 AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2403 # Fake what AC_TRY_COMPILE does, without linking as this is
2404 # unnecessary for this test.
2406 cat > conftest.$ac_ext << EOF
2407 [#]line __oline__ "configure"
2408 int main()
2409 {
2410 _Decimal32 d1;
2411 _Decimal64 d2;
2412 _Decimal128 d3;
2413 return 0;
2414 }
2415 EOF
2417 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2418 if AC_TRY_EVAL(ac_compile); then
2419 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2420 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2421 enable_dfp=yes
2422 else
2423 enable_dfp=no
2424 fi
2425 AC_MSG_RESULT($enable_dfp)
2426 rm -f conftest*
2427 ])
2429 dnl
2430 dnl Check for GNU 128-bit integer and floating point types.
2431 dnl
2432 dnl Note: also checks that the types aren't standard types.
2433 dnl
2434 dnl Defines:
2435 dnl _GLIBCXX_USE_INT128
2436 dnl _GLIBCXX_USE_FLOAT128
2437 dnl
2438 AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
2440 AC_LANG_SAVE
2441 AC_LANG_CPLUSPLUS
2443 # Fake what AC_TRY_COMPILE does, without linking as this is
2444 # unnecessary for this test.
2446 cat > conftest.$ac_ext << EOF
2447 [#]line __oline__ "configure"
2448 template<typename T1, typename T2>
2449 struct same
2450 { typedef T2 type; };
2452 template<typename T>
2453 struct same<T, T>;
2455 int main()
2456 {
2457 typename same<long, __int128>::type i1;
2458 typename same<long long, __int128>::type i2;
2459 }
2460 EOF
2462 AC_MSG_CHECKING([for __int128])
2463 if AC_TRY_EVAL(ac_compile); then
2464 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
2465 [Define if __int128 is supported on this host.])
2466 enable_int128=yes
2467 else
2468 enable_int128=no
2469 fi
2470 AC_MSG_RESULT($enable_int128)
2471 rm -f conftest*
2473 cat > conftest.$ac_ext << EOF
2474 [#]line __oline__ "configure"
2475 template<typename T1, typename T2>
2476 struct same
2477 { typedef T2 type; };
2479 template<typename T>
2480 struct same<T, T>;
2482 int main()
2483 {
2484 typename same<double, __float128>::type f1;
2485 typename same<long double, __float128>::type f2;
2486 }
2487 EOF
2489 AC_MSG_CHECKING([for __float128])
2490 if AC_TRY_EVAL(ac_compile); then
2491 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
2492 [Define if __float128 is supported on this host.])
2493 enable_float128=yes
2494 else
2495 enable_float128=no
2496 fi
2497 AC_MSG_RESULT($enable_float128)
2498 rm -f conftest*
2500 AC_LANG_RESTORE
2501 ])
2503 dnl
2504 dnl Check for template specializations for the 'wchar_t' type.
2505 dnl
2506 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2507 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2508 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2509 dnl Where DEFAULT is either `yes' or `no'.
2510 dnl
2511 dnl Necessary support must also be present.
2512 dnl
2513 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2514 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2516 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2517 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2518 AC_MSG_CHECKING([for mbstate_t])
2519 AC_TRY_COMPILE([#include <wchar.h>],
2520 [mbstate_t teststate;],
2521 have_mbstate_t=yes, have_mbstate_t=no)
2522 AC_MSG_RESULT($have_mbstate_t)
2523 if test x"$have_mbstate_t" = xyes; then
2524 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2525 fi
2527 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2528 # ac_has_wchar_h.
2529 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2531 if test x"$enable_wchar_t" = x"yes"; then
2533 AC_LANG_SAVE
2534 AC_LANG_CPLUSPLUS
2536 if test x"$ac_has_wchar_h" = xyes &&
2537 test x"$ac_has_wctype_h" = xyes; then
2538 AC_TRY_COMPILE([#include <wchar.h>
2539 #include <stddef.h>
2540 wint_t i;
2541 long l = WEOF;
2542 long j = WCHAR_MIN;
2543 long k = WCHAR_MAX;
2544 namespace test
2545 {
2546 using ::btowc;
2547 using ::fgetwc;
2548 using ::fgetws;
2549 using ::fputwc;
2550 using ::fputws;
2551 using ::fwide;
2552 using ::fwprintf;
2553 using ::fwscanf;
2554 using ::getwc;
2555 using ::getwchar;
2556 using ::mbrlen;
2557 using ::mbrtowc;
2558 using ::mbsinit;
2559 using ::mbsrtowcs;
2560 using ::putwc;
2561 using ::putwchar;
2562 using ::swprintf;
2563 using ::swscanf;
2564 using ::ungetwc;
2565 using ::vfwprintf;
2566 using ::vswprintf;
2567 using ::vwprintf;
2568 using ::wcrtomb;
2569 using ::wcscat;
2570 using ::wcschr;
2571 using ::wcscmp;
2572 using ::wcscoll;
2573 using ::wcscpy;
2574 using ::wcscspn;
2575 using ::wcsftime;
2576 using ::wcslen;
2577 using ::wcsncat;
2578 using ::wcsncmp;
2579 using ::wcsncpy;
2580 using ::wcspbrk;
2581 using ::wcsrchr;
2582 using ::wcsrtombs;
2583 using ::wcsspn;
2584 using ::wcsstr;
2585 using ::wcstod;
2586 using ::wcstok;
2587 using ::wcstol;
2588 using ::wcstoul;
2589 using ::wcsxfrm;
2590 using ::wctob;
2591 using ::wmemchr;
2592 using ::wmemcmp;
2593 using ::wmemcpy;
2594 using ::wmemmove;
2595 using ::wmemset;
2596 using ::wprintf;
2597 using ::wscanf;
2598 }
2599 ],[],[], [enable_wchar_t=no])
2600 else
2601 enable_wchar_t=no
2602 fi
2604 AC_LANG_RESTORE
2605 fi
2607 if test x"$enable_wchar_t" = x"yes"; then
2608 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2609 [Define if code specialized for wchar_t should be used.])
2610 fi
2612 AC_MSG_CHECKING([for enabled wchar_t specializations])
2613 AC_MSG_RESULT([$enable_wchar_t])
2614 ])
2617 dnl
2618 dnl Check to see if building and using a C++ precompiled header can be done.
2619 dnl
2620 dnl --enable-libstdcxx-pch=yes
2621 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2622 dnl may work, after some light-hearted attempts to puzzle out compiler
2623 dnl support, flip bits on in include/Makefile.am
2624 dnl
2625 dnl --disable-libstdcxx-pch
2626 dnl turns off attempts to use or build stdc++.h.gch.
2627 dnl
2628 dnl Substs:
2629 dnl glibcxx_PCHFLAGS
2630 dnl
2631 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2632 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2633 if test $enable_libstdcxx_pch = yes; then
2634 AC_CACHE_CHECK([for compiler with PCH support],
2635 [glibcxx_cv_prog_CXX_pch],
2636 [ac_save_CXXFLAGS="$CXXFLAGS"
2637 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2638 AC_LANG_SAVE
2639 AC_LANG_CPLUSPLUS
2640 echo '#include <math.h>' > conftest.h
2641 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2642 -o conftest.h.gch 1>&5 2>&1 &&
2643 echo '#error "pch failed"' > conftest.h &&
2644 echo '#include "conftest.h"' > conftest.cc &&
2645 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2646 then
2647 glibcxx_cv_prog_CXX_pch=yes
2648 else
2649 glibcxx_cv_prog_CXX_pch=no
2650 fi
2651 rm -f conftest*
2652 CXXFLAGS=$ac_save_CXXFLAGS
2653 AC_LANG_RESTORE
2654 ])
2655 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2656 fi
2658 AC_MSG_CHECKING([for enabled PCH])
2659 AC_MSG_RESULT([$enable_libstdcxx_pch])
2661 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2662 if test $enable_libstdcxx_pch = yes; then
2663 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2664 else
2665 glibcxx_PCHFLAGS=""
2666 fi
2667 AC_SUBST(glibcxx_PCHFLAGS)
2668 ])
2671 dnl
2672 dnl Check for atomic builtins.
2673 dnl See:
2674 dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
2675 dnl
2676 dnl This checks to see if the host supports the compiler-generated
2677 dnl builtins for atomic operations for various integral sizes. Note, this
2678 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2679 dnl that are used should be checked.
2680 dnl
2681 dnl Note:
2682 dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
2683 dnl
2684 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2685 AC_LANG_SAVE
2686 AC_LANG_CPLUSPLUS
2687 old_CXXFLAGS="$CXXFLAGS"
2689 # Do link tests if possible, instead asm tests, limited to some platforms
2690 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
2691 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
2692 atomic_builtins_link_tests=no
2693 if test x$gcc_no_link != xyes; then
2694 # Can do link tests. Limit to some tested platforms
2695 case "$host" in
2696 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
2697 atomic_builtins_link_tests=yes
2698 ;;
2699 esac
2700 fi
2702 if test x$atomic_builtins_link_tests = xyes; then
2704 # Do link tests.
2706 CXXFLAGS="$CXXFLAGS -fno-exceptions"
2708 AC_MSG_CHECKING([for atomic builtins for bool])
2709 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
2710 AC_TRY_LINK(
2711 [ ],
2712 [typedef bool atomic_type;
2713 atomic_type c1;
2714 atomic_type c2;
2715 atomic_type c3(0);
2716 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2717 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2718 __ATOMIC_RELAXED);
2719 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2720 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2721 ],
2722 [glibcxx_cv_atomic_bool=yes],
2723 [glibcxx_cv_atomic_bool=no])
2724 ])
2725 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2727 AC_MSG_CHECKING([for atomic builtins for short])
2728 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
2729 AC_TRY_LINK(
2730 [ ],
2731 [typedef short atomic_type;
2732 atomic_type c1;
2733 atomic_type c2;
2734 atomic_type c3(0);
2735 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2736 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2737 __ATOMIC_RELAXED);
2738 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2739 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2740 ],
2741 [glibcxx_cv_atomic_short=yes],
2742 [glibcxx_cv_atomic_short=no])
2743 ])
2744 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2746 AC_MSG_CHECKING([for atomic builtins for int])
2747 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
2748 AC_TRY_LINK(
2749 [ ],
2750 [typedef int atomic_type;
2751 atomic_type c1;
2752 atomic_type c2;
2753 atomic_type c3(0);
2754 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2755 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2756 __ATOMIC_RELAXED);
2757 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2758 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2759 ],
2760 [glibcxx_cv_atomic_int=yes],
2761 [glibcxx_cv_atomic_int=no])
2762 ])
2763 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2765 AC_MSG_CHECKING([for atomic builtins for long long])
2766 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
2767 AC_TRY_LINK(
2768 [ ],
2769 [typedef long long atomic_type;
2770 atomic_type c1;
2771 atomic_type c2;
2772 atomic_type c3(0);
2773 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2774 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2775 __ATOMIC_RELAXED);
2776 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2777 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2778 ],
2779 [glibcxx_cv_atomic_long_long=yes],
2780 [glibcxx_cv_atomic_long_long=no])
2781 ])
2782 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2784 else
2786 # Do asm tests.
2788 # Compile unoptimized.
2789 CXXFLAGS='-O0 -S'
2791 # Fake what AC_TRY_COMPILE does.
2793 cat > conftest.$ac_ext << EOF
2794 [#]line __oline__ "configure"
2795 int main()
2796 {
2797 typedef bool atomic_type;
2798 atomic_type c1;
2799 atomic_type c2;
2800 atomic_type c3(0);
2801 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2802 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2803 __ATOMIC_RELAXED);
2804 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2805 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2807 return 0;
2808 }
2809 EOF
2811 AC_MSG_CHECKING([for atomic builtins for bool])
2812 if AC_TRY_EVAL(ac_compile); then
2813 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2814 glibcxx_cv_atomic_bool=no
2815 else
2816 glibcxx_cv_atomic_bool=yes
2817 fi
2818 fi
2819 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
2820 rm -f conftest*
2822 cat > conftest.$ac_ext << EOF
2823 [#]line __oline__ "configure"
2824 int main()
2825 {
2826 typedef short atomic_type;
2827 atomic_type c1;
2828 atomic_type c2;
2829 atomic_type c3(0);
2830 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2831 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2832 __ATOMIC_RELAXED);
2833 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2834 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2836 return 0;
2837 }
2838 EOF
2840 AC_MSG_CHECKING([for atomic builtins for short])
2841 if AC_TRY_EVAL(ac_compile); then
2842 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2843 glibcxx_cv_atomic_short=no
2844 else
2845 glibcxx_cv_atomic_short=yes
2846 fi
2847 fi
2848 AC_MSG_RESULT($glibcxx_cv_atomic_short)
2849 rm -f conftest*
2851 cat > conftest.$ac_ext << EOF
2852 [#]line __oline__ "configure"
2853 int main()
2854 {
2855 // NB: _Atomic_word not necessarily int.
2856 typedef int atomic_type;
2857 atomic_type c1;
2858 atomic_type c2;
2859 atomic_type c3(0);
2860 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2861 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2862 __ATOMIC_RELAXED);
2863 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2864 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2866 return 0;
2867 }
2868 EOF
2870 AC_MSG_CHECKING([for atomic builtins for int])
2871 if AC_TRY_EVAL(ac_compile); then
2872 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2873 glibcxx_cv_atomic_int=no
2874 else
2875 glibcxx_cv_atomic_int=yes
2876 fi
2877 fi
2878 AC_MSG_RESULT($glibcxx_cv_atomic_int)
2879 rm -f conftest*
2881 cat > conftest.$ac_ext << EOF
2882 [#]line __oline__ "configure"
2883 int main()
2884 {
2885 typedef long long atomic_type;
2886 atomic_type c1;
2887 atomic_type c2;
2888 atomic_type c3(0);
2889 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
2890 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2891 __ATOMIC_RELAXED);
2892 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
2893 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2895 return 0;
2896 }
2897 EOF
2899 AC_MSG_CHECKING([for atomic builtins for long long])
2900 if AC_TRY_EVAL(ac_compile); then
2901 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
2902 glibcxx_cv_atomic_long_long=no
2903 else
2904 glibcxx_cv_atomic_long_long=yes
2905 fi
2906 fi
2907 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
2908 rm -f conftest*
2910 fi
2912 CXXFLAGS="$old_CXXFLAGS"
2913 AC_LANG_RESTORE
2915 # Set atomicity_dir to builtins if all but the long long test above passes.
2916 if test $glibcxx_cv_atomic_bool = yes \
2917 && test $glibcxx_cv_atomic_short = yes \
2918 && test $glibcxx_cv_atomic_int = yes; then
2919 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2920 [Define if the compiler supports C++11 atomics.])
2921 atomicity_dir=cpu/generic/atomicity_builtins
2922 fi
2924 # If still generic, set to mutex.
2925 if test $atomicity_dir = "cpu/generic" ; then
2926 atomicity_dir=cpu/generic/atomicity_mutex
2927 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2928 if test "x$target_thread_file" = xsingle; then
2929 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2930 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2931 else
2932 AC_MSG_WARN([They will be faked using a mutex.])
2933 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2934 fi
2935 fi
2937 ])
2940 dnl
2941 dnl Check for exception handling support. If an explicit enable/disable
2942 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2943 dnl target may or may not support call frame exceptions.
2944 dnl
2945 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2946 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2947 dnl Neither one forces an attempt at detection.
2948 dnl
2949 dnl Defines:
2950 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2951 dnl
2952 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2953 AC_MSG_CHECKING([for exception model to use])
2954 AC_LANG_SAVE
2955 AC_LANG_CPLUSPLUS
2956 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2957 [force use of builtin_setjmp for exceptions],
2958 [permit yes|no|auto])
2960 if test $enable_sjlj_exceptions = auto; then
2961 # Botheration. Now we've got to detect the exception model. Link tests
2962 # against libgcc.a are problematic since we've not been given proper -L
2963 # bits for single-tree newlib and libgloss.
2964 #
2965 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2966 cat > conftest.$ac_ext << EOF
2967 [#]line __oline__ "configure"
2968 struct S { ~S(); };
2969 void bar();
2970 void foo()
2971 {
2972 S s;
2973 bar();
2974 }
2975 EOF
2976 old_CXXFLAGS="$CXXFLAGS"
2977 CXXFLAGS=-S
2978 if AC_TRY_EVAL(ac_compile); then
2979 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2980 enable_sjlj_exceptions=yes
2981 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2982 enable_sjlj_exceptions=no
2983 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2984 enable_sjlj_exceptions=no
2985 fi
2986 fi
2987 CXXFLAGS="$old_CXXFLAGS"
2988 rm -f conftest*
2989 fi
2991 # This is a tad weird, for hysterical raisins. We have to map
2992 # enable/disable to two different models.
2993 case $enable_sjlj_exceptions in
2994 yes)
2995 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2996 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2997 ac_exception_model_name=sjlj
2998 ;;
2999 no)
3000 ac_exception_model_name="call frame"
3001 ;;
3002 *)
3003 AC_MSG_ERROR([unable to detect exception model])
3004 ;;
3005 esac
3006 AC_LANG_RESTORE
3007 AC_MSG_RESULT($ac_exception_model_name)
3008 ])
3011 dnl
3012 dnl Allow visibility attributes to be used on namespaces, objects, etc.
3013 dnl
3014 dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3015 dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3016 dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
3017 dnl Where DEFAULT is 'yes'.
3018 dnl
3019 AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3020 GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
3022 if test x$enable_libstdcxx_visibility = xyes ; then
3023 dnl all hail libgfortran
3024 dnl Check whether the target supports hidden visibility.
3025 AC_CACHE_CHECK([whether the target supports hidden visibility],
3026 glibcxx_cv_have_attribute_visibility, [
3027 save_CFLAGS="$CFLAGS"
3028 CFLAGS="$CFLAGS -Werror"
3029 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
3030 [], glibcxx_cv_have_attribute_visibility=yes,
3031 glibcxx_cv_have_attribute_visibility=no)
3032 CFLAGS="$save_CFLAGS"])
3033 if test $glibcxx_cv_have_attribute_visibility = no; then
3034 enable_libstdcxx_visibility=no
3035 fi
3036 fi
3038 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3039 AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
3040 ])
3043 dnl
3044 dnl Add version tags to symbols in shared library (or not), additionally
3045 dnl marking other symbols as private/local (or not).
3046 dnl
3047 dnl Sets libtool_VERSION, and determines shared library SONAME.
3048 dnl
3049 dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3050 dnl
3051 dnl --enable-symvers=style adds a version script to the linker call when
3052 dnl creating the shared library. The choice of version script is
3053 dnl controlled by 'style'.
3054 dnl --disable-symvers does not.
3055 dnl
3056 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
3057 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3058 dnl choose a default style based on linker characteristics. Passing
3059 dnl 'no' disables versioning.
3060 dnl
3061 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
3063 GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
3064 [enables symbol versioning of the shared library],
3065 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
3067 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
3068 # don't know enough about $LD to do tricks...
3069 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
3070 # Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3071 # with extern "C++" in version scripts.
3072 AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3074 # Turn a 'yes' into a suitable default.
3075 if test x$enable_symvers = xyes ; then
3076 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3077 enable_symvers=no
3078 else
3079 if test $with_gnu_ld = yes ; then
3080 case ${target_os} in
3081 hpux*)
3082 enable_symvers=no ;;
3083 *)
3084 enable_symvers=gnu ;;
3085 esac
3086 else
3087 case ${target_os} in
3088 darwin*)
3089 enable_symvers=darwin ;;
3090 # Sun symbol versioning exists since Solaris 2.5.
3091 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3092 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3093 # version scripts, so disable symbol versioning if none can be
3094 # found.
3095 if test -z "$ac_cv_path_CXXFILT"; then
3096 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3097 AC_MSG_WARN([=== no GNU c++filt could be found.])
3098 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3099 enable_symvers=no
3100 else
3101 enable_symvers=sun
3102 fi
3103 ;;
3104 *)
3105 enable_symvers=no ;;
3106 esac
3107 fi
3108 fi
3109 fi
3111 # Check to see if 'darwin' or 'darwin-export' can win.
3112 if test x$enable_symvers = xdarwin-export ; then
3113 enable_symvers=darwin
3114 fi
3116 # Check if 'sun' was requested on non-Solaris 2 platforms.
3117 if test x$enable_symvers = xsun ; then
3118 case ${target_os} in
3119 solaris2*)
3120 # All fine.
3121 ;;
3122 *)
3123 # Unlikely to work.
3124 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3125 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3126 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3127 enable_symvers=no
3128 ;;
3129 esac
3130 fi
3132 # Check to see if 'gnu' can win.
3133 if test $enable_symvers = gnu ||
3134 test $enable_symvers = gnu-versioned-namespace ||
3135 test $enable_symvers = sun; then
3136 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
3137 AC_MSG_CHECKING([for shared libgcc])
3138 ac_save_CFLAGS="$CFLAGS"
3139 CFLAGS=' -lgcc_s'
3140 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
3141 CFLAGS="$ac_save_CFLAGS"
3142 if test $glibcxx_shared_libgcc = no; then
3143 cat > conftest.c <<EOF
3144 int main (void) { return 0; }
3145 EOF
3146 changequote(,)dnl
3147 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3148 -shared -shared-libgcc -o conftest.so \
3149 conftest.c -v 2>&1 >/dev/null \
3150 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3151 changequote([,])dnl
3152 rm -f conftest.c conftest.so
3153 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3154 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3155 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3156 CFLAGS="$ac_save_CFLAGS"
3157 fi
3158 fi
3159 AC_MSG_RESULT($glibcxx_shared_libgcc)
3161 # For GNU ld, we need at least this version. The format is described in
3162 # GLIBCXX_CHECK_LINKER_FEATURES above.
3163 glibcxx_min_gnu_ld_version=21400
3165 # If no shared libgcc, can't win.
3166 if test $glibcxx_shared_libgcc != yes; then
3167 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3168 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3169 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3170 enable_symvers=no
3171 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3172 : All interesting versions of Sun ld support sun style symbol versioning.
3173 elif test $with_gnu_ld != yes ; then
3174 # just fail for now
3175 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3176 AC_MSG_WARN([=== you are not using the GNU linker.])
3177 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3178 enable_symvers=no
3179 elif test $glibcxx_ld_is_gold = yes ; then
3180 : All versions of gold support symbol versioning.
3181 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3182 # The right tools, the right setup, but too old. Fallbacks?
3183 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3184 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3185 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3186 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
3187 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3188 enable_symvers=no
3189 fi
3190 fi
3192 # For libtool versioning info, format is CURRENT:REVISION:AGE
3193 libtool_VERSION=6:17:0
3195 # Everything parsed; figure out what files and settings to use.
3196 case $enable_symvers in
3197 no)
3198 SYMVER_FILE=config/abi/pre/none.ver
3199 ;;
3200 gnu)
3201 SYMVER_FILE=config/abi/pre/gnu.ver
3202 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3203 [Define to use GNU versioning in the shared library.])
3204 ;;
3205 gnu-versioned-namespace)
3206 libtool_VERSION=7:0:0
3207 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
3208 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3209 [Define to use GNU namespace versioning in the shared library.])
3210 ;;
3211 darwin)
3212 SYMVER_FILE=config/abi/pre/gnu.ver
3213 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3214 [Define to use darwin versioning in the shared library.])
3215 ;;
3216 sun)
3217 SYMVER_FILE=config/abi/pre/gnu.ver
3218 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3219 [Define to use Sun versioning in the shared library.])
3220 ;;
3221 esac
3223 if test x$enable_symvers != xno ; then
3224 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3225 [Define to use symbol versioning in the shared library.])
3226 fi
3228 AC_CACHE_CHECK([whether the target supports .symver directive],
3229 glibcxx_cv_have_as_symver_directive, [
3230 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3231 [], glibcxx_cv_have_as_symver_directive=yes,
3232 glibcxx_cv_have_as_symver_directive=no)])
3233 if test $glibcxx_cv_have_as_symver_directive = yes; then
3234 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3235 [Define to 1 if the target assembler supports .symver directive.])
3236 fi
3238 AC_SUBST(SYMVER_FILE)
3239 AC_SUBST(port_specific_symbol_files)
3240 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3241 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3242 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
3243 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
3244 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
3245 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3247 if test $enable_symvers != no ; then
3248 case ${target_os} in
3249 # The Solaris 2 runtime linker doesn't support the GNU extension of
3250 # binding the same symbol to different versions
3251 solaris2*)
3252 ;;
3253 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3254 *)
3255 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
3256 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
3257 ;;
3258 esac
3259 fi
3261 # Now, set up compatibility support, if any.
3262 # In addition, need this to deal with std::size_t mangling in
3263 # src/compatibility.cc. In a perfect world, could use
3264 # typeid(std::size_t).name()[0] to do direct substitution.
3265 AC_MSG_CHECKING([for size_t as unsigned int])
3266 ac_save_CFLAGS="$CFLAGS"
3267 CFLAGS="-Werror"
3268 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3269 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
3270 CFLAGS=$ac_save_CFLAGS
3271 if test "$glibcxx_size_t_is_i" = yes; then
3272 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3273 fi
3274 AC_MSG_RESULT([$glibcxx_size_t_is_i])
3276 AC_MSG_CHECKING([for ptrdiff_t as int])
3277 ac_save_CFLAGS="$CFLAGS"
3278 CFLAGS="-Werror"
3279 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3280 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
3281 CFLAGS=$ac_save_CFLAGS
3282 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3283 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3284 fi
3285 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
3286 ])
3289 dnl
3290 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3291 dnl We must stage the required headers so that they will be installed
3292 dnl with the library (unlike libgcc, the STL implementation is provided
3293 dnl solely within headers). Since we must not inject random user-space
3294 dnl macro names into user-provided C++ code, we first stage into <file>-in
3295 dnl and process to <file> with an output command. The reason for a two-
3296 dnl stage process here is to correctly handle $srcdir!=$objdir without
3297 dnl having to write complex code (the sed commands to clean the macro
3298 dnl namespace are complex and fragile enough as it is). We must also
3299 dnl add a relative path so that -I- is supported properly.
3300 dnl
3301 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
3302 AC_MSG_CHECKING([for thread model used by GCC])
3303 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3304 AC_MSG_RESULT([$target_thread_file])
3305 ])
3308 dnl
3309 dnl Check if gthread implementation defines the types and functions
3310 dnl required by the c++0x thread library. Conforming gthread
3311 dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3312 dnl
3313 dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3314 dnl
3315 AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3316 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3318 if test x$enable_libstdcxx_threads = xauto ||
3319 test x$enable_libstdcxx_threads = xyes; then
3321 AC_LANG_SAVE
3322 AC_LANG_CPLUSPLUS
3324 ac_save_CXXFLAGS="$CXXFLAGS"
3325 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3326 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
3328 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3329 case $target_thread_file in
3330 posix)
3331 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3332 esac
3334 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
3336 AC_TRY_COMPILE([#include <unistd.h>],
3337 [
3338 // In case of POSIX threads check _POSIX_TIMEOUTS.
3339 #if (defined(_PTHREADS) \
3340 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
3341 #error
3342 #endif
3343 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3345 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
3346 [Define to 1 if mutex_timedlock is available.])
3348 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3349 else res_mutex_timedlock=no ; fi
3350 AC_MSG_RESULT([$res_mutex_timedlock])
3352 AC_MSG_CHECKING([for gthreads library])
3354 AC_TRY_COMPILE([#include "gthr.h"],
3355 [
3356 #ifndef __GTHREADS_CXX0X
3357 #error
3358 #endif
3359 ], [case $target_os in
3360 # gthreads support breaks symbol versioning on Solaris 9 (PR
3361 # libstdc++/52189).
3362 solaris2.9*)
3363 if test x$enable_symvers = xno; then
3364 ac_has_gthreads=yes
3365 elif test x$enable_libstdcxx_threads = xyes; then
3366 AC_MSG_WARN([You have requested C++11 threads support, but])
3367 AC_MSG_WARN([this breaks symbol versioning.])
3368 ac_has_gthreads=yes
3369 else
3370 ac_has_gthreads=no
3371 fi
3372 ;;
3373 *)
3374 ac_has_gthreads=yes
3375 ;;
3376 esac],
3377 [ac_has_gthreads=no])
3378 else
3379 ac_has_gthreads=no
3380 fi
3382 AC_MSG_RESULT([$ac_has_gthreads])
3384 if test x"$ac_has_gthreads" = x"yes"; then
3385 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
3386 [Define if gthreads library is available.])
3387 fi
3389 CXXFLAGS="$ac_save_CXXFLAGS"
3390 AC_LANG_RESTORE
3391 ])
3394 # Check whether LC_MESSAGES is available in <locale.h>.
3395 # Ulrich Drepper <drepper@cygnus.com>, 1995.
3396 #
3397 # This file file be copied and used freely without restrictions. It can
3398 # be used in projects which are not available under the GNU Public License
3399 # but which still want to provide support for the GNU gettext functionality.
3400 # Please note that the actual code is *not* freely available.
3401 AC_DEFUN([AC_LC_MESSAGES], [
3402 AC_CHECK_HEADER(locale.h, [
3403 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
3404 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
3405 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3406 if test $ac_cv_val_LC_MESSAGES = yes; then
3407 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3408 [Define if LC_MESSAGES is available in <locale.h>.])
3409 fi
3410 ])
3411 ])
3413 dnl
3414 dnl Check whether rdrand is supported in the assembler.
3415 AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3416 AC_MSG_CHECKING([for rdrand support in assembler])
3417 AC_CACHE_VAL(ac_cv_x86_rdrand, [
3418 ac_cv_x86_rdrand=no
3419 case "$target" in
3420 i?86-*-* | \
3421 x86_64-*-*)
3422 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3423 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3424 esac
3425 ])
3426 if test $ac_cv_x86_rdrand = yes; then
3427 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3428 [ Defined if as can handle rdrand. ])
3429 fi
3430 AC_MSG_RESULT($ac_cv_x86_rdrand)
3431 ])
3433 dnl
3434 dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3435 dnl
3436 AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3438 AC_LANG_SAVE
3439 AC_LANG_CPLUSPLUS
3440 ac_save_CXXFLAGS="$CXXFLAGS"
3441 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3443 AC_MSG_CHECKING([for get_nprocs])
3444 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3445 GCC_TRY_COMPILE_OR_LINK(
3446 [#include <sys/sysinfo.h>],
3447 [int n = get_nprocs();],
3448 [glibcxx_cv_GET_NPROCS=yes],
3449 [glibcxx_cv_GET_NPROCS=no])
3450 ])
3451 if test $glibcxx_cv_GET_NPROCS = yes; then
3452 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3453 fi
3454 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3456 CXXFLAGS="$ac_save_CXXFLAGS"
3457 AC_LANG_RESTORE
3458 ])
3460 dnl
3461 dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3462 dnl
3463 AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3465 AC_LANG_SAVE
3466 AC_LANG_CPLUSPLUS
3467 ac_save_CXXFLAGS="$CXXFLAGS"
3468 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3470 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3471 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3472 GCC_TRY_COMPILE_OR_LINK(
3473 [#include <unistd.h>],
3474 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3475 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3476 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3477 ])
3478 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3479 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3480 fi
3481 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3483 CXXFLAGS="$ac_save_CXXFLAGS"
3484 AC_LANG_RESTORE
3485 ])
3487 dnl
3488 dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
3489 dnl
3490 AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
3492 AC_LANG_SAVE
3493 AC_LANG_CPLUSPLUS
3494 ac_save_CXXFLAGS="$CXXFLAGS"
3495 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3497 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
3498 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
3499 GCC_TRY_COMPILE_OR_LINK(
3500 [#include <unistd.h>],
3501 [int n = sysconf(_SC_NPROC_ONLN);],
3502 [glibcxx_cv_SC_NPROC_ONLN=yes],
3503 [glibcxx_cv_SC_NPROC_ONLN=no])
3504 ])
3505 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
3506 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
3507 fi
3508 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
3510 CXXFLAGS="$ac_save_CXXFLAGS"
3511 AC_LANG_RESTORE
3512 ])
3514 dnl
3515 dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
3516 dnl
3517 AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
3519 AC_LANG_SAVE
3520 AC_LANG_CPLUSPLUS
3521 ac_save_CXXFLAGS="$CXXFLAGS"
3522 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3524 AC_MSG_CHECKING([for pthreads_num_processors_np])
3525 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
3526 GCC_TRY_COMPILE_OR_LINK(
3527 [#include <pthread.h>],
3528 [int n = pthread_num_processors_np();],
3529 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
3530 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
3531 ])
3532 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
3533 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
3534 fi
3535 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
3537 CXXFLAGS="$ac_save_CXXFLAGS"
3538 AC_LANG_RESTORE
3539 ])
3541 dnl
3542 dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
3543 dnl
3544 AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
3546 AC_LANG_SAVE
3547 AC_LANG_CPLUSPLUS
3548 ac_save_CXXFLAGS="$CXXFLAGS"
3549 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3551 AC_MSG_CHECKING([for hw.ncpu sysctl])
3552 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
3553 GCC_TRY_COMPILE_OR_LINK(
3554 [
3555 #include <stddef.h>
3556 #include <sys/sysctl.h>
3557 ],
3558 [
3559 int count;
3560 size_t size = sizeof(count);
3561 int mib[] = { CTL_HW, HW_NCPU };
3562 sysctl(mib, 2, &count, &size, NULL, 0);
3563 ],
3564 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
3565 [glibcxx_cv_SYSCTL_HW_NCPU=no])
3566 ])
3567 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
3568 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
3569 fi
3570 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
3572 CXXFLAGS="$ac_save_CXXFLAGS"
3573 AC_LANG_RESTORE
3574 ])
3576 dnl
3577 dnl Check to see if python pretty printing can be activated.
3578 dnl
3579 dnl --with-python-dir=dir
3580 dnl installs directory into $prefix/dir
3581 AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
3583 AC_MSG_CHECKING([for custom python install directory])
3584 AC_ARG_WITH([python-dir],
3585 AS_HELP_STRING([--with-python-dir],
3586 [the location to install Python modules. This path is relative starting from the prefix.]),
3587 [with_python_dir=$withval], [with_python_dir="no"])
3588 AC_MSG_RESULT(${with_python_dir})
3590 # Needed for installing Python modules during make install.
3591 python_mod_dir="${with_python_dir}"
3592 AC_SUBST(python_mod_dir)
3593 GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
3594 ])
3596 dnl
3597 dnl Check to see if -Werror is disabled.
3598 dnl
3599 dnl --enable-werror/--disable-werror
3600 AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
3601 AC_MSG_CHECKING([for -Werror])
3602 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
3603 AC_MSG_RESULT($enable_werror)
3604 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
3605 ])
3608 # Macros from the top-level gcc directory.
3609 m4_include([../config/gc++filt.m4])
3610 m4_include([../config/tls.m4])