| blob | db3c7b19b252dca31d707a5be1b51fe7b4a4c16f |
2 dnl
3 dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
4 dnl
5 dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
6 dnl end of configure. This lets tested variables be reassigned, and the
7 dnl conditional will depend on the final state of the variable. For a simple
8 dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
9 dnl
10 m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
11 AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
12 m4_divert_text([glibcxx_diversion],dnl
13 AM_CONDITIONAL([$1],[$2])
14 )dnl
15 ])dnl
16 AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
19 dnl
20 dnl Check to see what architecture and operating system we are compiling
21 dnl for. Also, if architecture- or OS-specific flags are required for
22 dnl compilation, pick them up here.
23 dnl
24 AC_DEFUN([GLIBCXX_CHECK_HOST], [
25 . $glibcxx_srcdir/configure.host
26 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
27 AC_MSG_NOTICE([OS config directory is $os_include_dir])
28 ])
30 dnl
31 dnl Initialize the rest of the library configury. At this point we have
32 dnl variables like $host.
33 dnl
34 dnl Sets:
35 dnl SUBDIRS
36 dnl Substs:
37 dnl glibcxx_builddir (absolute path)
38 dnl glibcxx_srcdir (absolute path)
39 dnl toplevel_srcdir (absolute path)
40 dnl with_cross_host
41 dnl with_newlib
42 dnl with_target_subdir
43 dnl plus
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
47 dnl
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src doc po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
59 case $srcdir in
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
62 esac
63 toplevel_srcdir=${glibcxx_srcdir}/..
64 AC_SUBST(glibcxx_builddir)
65 AC_SUBST(glibcxx_srcdir)
66 AC_SUBST(toplevel_srcdir)
68 # We use these options to decide which functions to include. They are
69 # set from the top level.
70 AC_ARG_WITH([target-subdir],
71 AC_HELP_STRING([--with-target-subdir=SUBDIR],
72 [configuring in a subdirectory]))
74 AC_ARG_WITH([cross-host],
75 AC_HELP_STRING([--with-cross-host=HOST],
76 [configuring with a cross compiler]))
78 AC_ARG_WITH([newlib],
79 AC_HELP_STRING([--with-newlib],
80 [assume newlib as a system C library]))
82 # We're almost certainly being configured before anything else which uses
83 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
84 # we not cache the value of CXX that we "discover" here, because it's set
85 # to something unique for us and libjava. Other target libraries need to
86 # find CXX for themselves. We yank the rug out from under the normal AC_*
87 # process by sneakily renaming the cache variable. This also lets us debug
88 # the value of "our" CXX in postmortems.
89 #
90 # We must also force CXX to /not/ be a precious variable, otherwise the
91 # wrong (non-multilib-adjusted) value will be used in multilibs. This
92 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
93 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
94 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
95 #
96 # -fno-builtin must be present here so that a non-conflicting form of
97 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
99 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
100 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
101 m4_define([_AC_ARG_VAR_PRECIOUS],[])
102 save_CXXFLAGS="$CXXFLAGS"
103 CXXFLAGS="$CXXFLAGS -fno-builtin"
104 AC_PROG_CC
105 AC_PROG_CXX
106 CXXFLAGS="$save_CXXFLAGS"
107 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
108 AC_SUBST(CFLAGS)
109 AC_SUBST(CXXFLAGS)
111 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
112 # available). Uncomment the next line to force a particular method.
113 AC_PROG_LN_S
114 #LN_S='cp -p'
116 AC_CHECK_TOOL(AS, as)
117 AC_CHECK_TOOL(AR, ar)
118 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
120 AM_MAINTAINER_MODE
122 # Set up safe default values for all subsequent AM_CONDITIONAL tests
123 # which are themselves conditionally expanded.
124 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
125 ## other macros from doing the same. This should be automated.) -pme
126 need_libmath=no
128 # Check for uClibc since Linux platforms use different configuration
129 # directories depending on the C library in use.
130 AC_EGREP_CPP([_using_uclibc], [
131 #include <stdio.h>
132 #if __UCLIBC__
133 _using_uclibc
134 #endif
135 ], uclibc=yes, uclibc=no)
137 # Find platform-specific directories containing configuration info.
138 # Also possibly modify flags used elsewhere, as needed by the platform.
139 GLIBCXX_CHECK_HOST
140 ])
143 dnl
144 dnl Tests for newer compiler features, or features that are present in newer
145 dnl compiler versions but not older compiler versions still in use, should
146 dnl be placed here.
147 dnl
148 dnl Defines:
149 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
150 dnl new inlining code or the new system_header pragma will die on -Werror.
151 dnl Leave it out by default and use maint-mode to use it.
152 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
153 dnl compiler supports it and the user has not requested debug mode.
154 dnl
155 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
156 # All these tests are for C++; save the language and the compiler flags.
157 # The CXXFLAGS thing is suspicious, but based on similar bits previously
158 # found in GLIBCXX_CONFIGURE.
159 AC_LANG_SAVE
160 AC_LANG_CPLUSPLUS
161 ac_test_CXXFLAGS="${CXXFLAGS+set}"
162 ac_save_CXXFLAGS="$CXXFLAGS"
164 # Check for maintainer-mode bits.
165 if test x"$USE_MAINTAINER_MODE" = xno; then
166 WERROR=''
167 else
168 WERROR='-Werror'
169 fi
171 # Check for -ffunction-sections -fdata-sections
172 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
173 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
174 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
175 if test "$ac_test_CXXFLAGS" = set; then
176 CXXFLAGS="$ac_save_CXXFLAGS"
177 else
178 # this is the suspicious part
179 CXXFLAGS=''
180 fi
181 if test x"$ac_fdsections" = x"yes"; then
182 SECTION_FLAGS='-ffunction-sections -fdata-sections'
183 fi
184 AC_MSG_RESULT($ac_fdsections)
186 AC_LANG_RESTORE
187 AC_SUBST(WERROR)
188 AC_SUBST(SECTION_FLAGS)
189 ])
192 dnl
193 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
194 dnl the native linker is in use, all variables will be defined to something
195 dnl safe (like an empty string).
196 dnl
197 dnl Defines:
198 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
199 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
200 dnl LD (as a side effect of testing)
201 dnl Sets:
202 dnl with_gnu_ld
203 dnl glibcxx_ld_is_gold (set to "no" or "yes")
204 dnl glibcxx_gnu_ld_version (possibly)
205 dnl
206 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
207 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
208 dnl
209 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
210 # If we're not using GNU ld, then there's no point in even trying these
211 # tests. Check for that first. We should have already tested for gld
212 # by now (in libtool), but require it now just to be safe...
213 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
214 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
215 AC_REQUIRE([AC_PROG_LD])
216 AC_REQUIRE([AC_PROG_AWK])
218 # The name set by libtool depends on the version of libtool. Shame on us
219 # for depending on an impl detail, but c'est la vie. Older versions used
220 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
221 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
222 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
223 # set (hence we're using an older libtool), then set it.
224 if test x${with_gnu_ld+set} != xset; then
225 if test x${ac_cv_prog_gnu_ld+set} != xset; then
226 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
227 with_gnu_ld=no
228 else
229 with_gnu_ld=$ac_cv_prog_gnu_ld
230 fi
231 fi
233 # Start by getting the version number. I think the libtool test already
234 # does some of this, but throws away the result.
235 glibcxx_ld_is_gold=no
236 if test x"$with_gnu_ld" = x"yes"; then
237 AC_MSG_CHECKING([for ld version])
238 changequote(,)
239 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
240 glibcxx_ld_is_gold=yes
241 fi
242 ldver=`$LD --version 2>/dev/null | head -1 | \
243 sed -e 's/GNU \(go\)\{0,1\}ld \(version \)\{0,1\}\(([^)]*) \)\{0,1\}\([0-9.][0-9.]*\).*/\4/'`
244 changequote([,])
245 glibcxx_gnu_ld_version=`echo $ldver | \
246 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
247 AC_MSG_RESULT($glibcxx_gnu_ld_version)
248 fi
250 # Set --gc-sections.
251 glibcxx_have_gc_sections=no
252 if test "$glibcxx_ld_is_gold" = "yes"; then
253 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
254 glibcxx_have_gc_sections=yes
255 fi
256 else
257 glibcxx_gcsections_min_ld=21602
258 if test x"$with_gnu_ld" = x"yes" &&
259 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
260 glibcxx_have_gc_sections=yes
261 fi
262 fi
263 if test "$glibcxx_have_gc_sections" = "yes"; then
264 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
265 # NB: This flag only works reliably after 2.16.1. Configure tests
266 # for this are difficult, so hard wire a value that should work.
268 ac_test_CFLAGS="${CFLAGS+set}"
269 ac_save_CFLAGS="$CFLAGS"
270 CFLAGS='-Wl,--gc-sections'
272 # Check for -Wl,--gc-sections
273 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
274 AC_TRY_LINK([ int one(void) { return 1; }
275 int two(void) { return 2; }
276 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
277 if test "$ac_gcsections" = "yes"; then
278 rm -f conftest.c
279 touch conftest.c
280 if $CC -c conftest.c; then
281 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
282 grep "Warning: gc-sections option ignored" > /dev/null; then
283 ac_gcsections=no
284 fi
285 fi
286 rm -f conftest.c conftest.o conftest
287 fi
288 if test "$ac_gcsections" = "yes"; then
289 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
290 fi
291 AC_MSG_RESULT($ac_gcsections)
293 if test "$ac_test_CFLAGS" = set; then
294 CFLAGS="$ac_save_CFLAGS"
295 else
296 # this is the suspicious part
297 CFLAGS=''
298 fi
299 fi
301 # Set -z,relro.
302 # Note this is only for shared objects.
303 ac_ld_relro=no
304 if test x"$with_gnu_ld" = x"yes"; then
305 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
306 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
307 if test -n "$cxx_z_relo"; then
308 OPT_LDFLAGS="-Wl,-z,relro"
309 ac_ld_relro=yes
310 fi
311 AC_MSG_RESULT($ac_ld_relro)
312 fi
314 # Set linker optimization flags.
315 if test x"$with_gnu_ld" = x"yes"; then
316 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
317 fi
319 AC_SUBST(SECTION_LDFLAGS)
320 AC_SUBST(OPT_LDFLAGS)
321 ])
324 dnl
325 dnl Check for headers for, and arguments to, the setrlimit() function.
326 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
327 dnl
328 dnl Defines:
329 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
330 dnl various HAVE_LIMIT_* for individual limit names
331 dnl
332 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
333 AC_MSG_CHECKING([for RLIMIT_$1])
334 AC_TRY_COMPILE(
335 [#include <unistd.h>
336 #include <sys/time.h>
337 #include <sys/resource.h>
338 ],
339 [ int f = RLIMIT_$1 ; ],
340 [glibcxx_mresult=1], [glibcxx_mresult=0])
341 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
342 [Only used in build directory testsuite_hooks.h.])
343 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
344 AC_MSG_RESULT($res)
345 ])
347 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
348 setrlimit_have_headers=yes
349 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
350 [],
351 [setrlimit_have_headers=no])
352 # If don't have the headers, then we can't run the tests now, and we
353 # won't be seeing any of these during testsuite compilation.
354 if test $setrlimit_have_headers = yes; then
355 # Can't do these in a loop, else the resulting syntax is wrong.
356 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
357 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
358 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
359 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
360 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
362 # Check for rlimit, setrlimit.
363 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
364 AC_TRY_COMPILE(
365 [#include <unistd.h>
366 #include <sys/time.h>
367 #include <sys/resource.h>
368 ],
369 [struct rlimit r;
370 setrlimit(0, &r);],
371 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
372 ])
373 fi
375 AC_MSG_CHECKING([for testsuite resource limits support])
376 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
377 ac_res_limits=yes
378 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
379 [Define if using setrlimit to set resource limits during
380 "make check"])
381 else
382 ac_res_limits=no
383 fi
384 AC_MSG_RESULT($ac_res_limits)
385 ])
388 dnl
389 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
390 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
391 dnl
392 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
393 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
394 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
395 AC_TRY_LINK(
396 [#include <sys/stat.h>],
397 [struct stat buffer;
398 fstat(0, &buffer);
399 S_ISREG(buffer.st_mode);],
400 [glibcxx_cv_S_ISREG=yes],
401 [glibcxx_cv_S_ISREG=no])
402 ])
403 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
404 AC_TRY_LINK(
405 [#include <sys/stat.h>],
406 [struct stat buffer;
407 fstat(0, &buffer);
408 S_IFREG & buffer.st_mode;],
409 [glibcxx_cv_S_IFREG=yes],
410 [glibcxx_cv_S_IFREG=no])
411 ])
412 res=no
413 if test $glibcxx_cv_S_ISREG = yes; then
414 AC_DEFINE(HAVE_S_ISREG, 1,
415 [Define if S_IFREG is available in <sys/stat.h>.])
416 res=S_ISREG
417 elif test $glibcxx_cv_S_IFREG = yes; then
418 AC_DEFINE(HAVE_S_IFREG, 1,
419 [Define if S_IFREG is available in <sys/stat.h>.])
420 res=S_IFREG
421 fi
422 AC_MSG_RESULT($res)
423 ])
426 dnl
427 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
428 dnl
429 AC_DEFUN([GLIBCXX_CHECK_POLL], [
430 AC_MSG_CHECKING([for poll])
431 AC_CACHE_VAL(glibcxx_cv_POLL, [
432 AC_TRY_LINK(
433 [#include <poll.h>],
434 [struct pollfd pfd[1];
435 pfd[0].events = POLLIN;
436 poll(pfd, 1, 0);],
437 [glibcxx_cv_POLL=yes],
438 [glibcxx_cv_POLL=no])
439 ])
440 if test $glibcxx_cv_POLL = yes; then
441 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
442 fi
443 AC_MSG_RESULT($glibcxx_cv_POLL)
444 ])
447 dnl
448 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
449 dnl
450 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
451 AC_MSG_CHECKING([for writev])
452 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
453 AC_TRY_LINK(
454 [#include <sys/uio.h>],
455 [struct iovec iov[2];
456 writev(0, iov, 0);],
457 [glibcxx_cv_WRITEV=yes],
458 [glibcxx_cv_WRITEV=no])
459 ])
460 if test $glibcxx_cv_WRITEV = yes; then
461 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
462 fi
463 AC_MSG_RESULT($glibcxx_cv_WRITEV)
464 ])
467 dnl
468 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
469 dnl
470 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
471 AC_MSG_CHECKING([for int64_t])
472 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
473 AC_TRY_COMPILE(
474 [#include <stdint.h>],
475 [int64_t var;],
476 [glibcxx_cv_INT64_T=yes],
477 [glibcxx_cv_INT64_T=no])
478 ])
479 if test $glibcxx_cv_INT64_T = yes; then
480 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
481 fi
482 AC_MSG_RESULT($glibcxx_cv_INT64_T)
483 ])
486 dnl
487 dnl Check whether LFS support is available.
488 dnl
489 AC_DEFUN([GLIBCXX_CHECK_LFS], [
490 AC_LANG_SAVE
491 AC_LANG_CPLUSPLUS
492 ac_save_CXXFLAGS="$CXXFLAGS"
493 CXXFLAGS="$CXXFLAGS -fno-exceptions"
494 AC_MSG_CHECKING([for LFS support])
495 AC_CACHE_VAL(glibcxx_cv_LFS, [
496 AC_TRY_LINK(
497 [#include <unistd.h>
498 #include <stdio.h>
499 #include <sys/stat.h>
500 ],
501 [FILE* fp;
502 fopen64("t", "w");
503 fseeko64(fp, 0, SEEK_CUR);
504 ftello64(fp);
505 lseek64(1, 0, SEEK_CUR);
506 struct stat64 buf;
507 fstat64(1, &buf);],
508 [glibcxx_cv_LFS=yes],
509 [glibcxx_cv_LFS=no])
510 ])
511 if test $glibcxx_cv_LFS = yes; then
512 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
513 fi
514 AC_MSG_RESULT($glibcxx_cv_LFS)
515 CXXFLAGS="$ac_save_CXXFLAGS"
516 AC_LANG_RESTORE
517 ])
520 dnl
521 dnl Check for whether a fully dynamic basic_string implementation should
522 dnl be turned on, that does not put empty objects in per-process static
523 dnl memory (mostly useful together with shared memory allocators, see PR
524 dnl libstdc++/16612 for details).
525 dnl
526 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
527 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
528 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
529 dnl Where DEFAULT is either `yes' or `no'.
530 dnl
531 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
532 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
533 if test $enable_fully_dynamic_string = yes; then
534 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
535 [Define if a fully dynamic basic_string is wanted.])
536 fi
537 ])
540 dnl
541 dnl Does any necessary configuration of the testsuite directory. Generates
542 dnl the testsuite_hooks.h header.
543 dnl
544 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
545 dnl
546 dnl Sets:
547 dnl enable_abi_check
548 dnl GLIBCXX_TEST_WCHAR_T
549 dnl GLIBCXX_TEST_THREAD
550 dnl Substs:
551 dnl baseline_dir
552 dnl
553 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
554 if $GLIBCXX_IS_NATIVE ; then
555 # Do checks for resource limit functions.
556 GLIBCXX_CHECK_SETRLIMIT
558 # Look for setenv, so that extended locale tests can be performed.
559 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
560 fi
562 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
563 test $enable_symvers != no; then
564 case "$host" in
565 *-*-cygwin*)
566 enable_abi_check=no ;;
567 *)
568 enable_abi_check=yes ;;
569 esac
570 else
571 # Only build this as native, since automake does not understand
572 # CXX_FOR_BUILD.
573 enable_abi_check=no
574 fi
576 # Export file names for ABI checking.
577 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
578 AC_SUBST(baseline_dir)
579 ])
582 dnl
583 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
584 dnl
585 dnl Substs:
586 dnl GLIBCXX_INCLUDES
587 dnl TOPLEVEL_INCLUDES
588 dnl
589 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
590 # Used for every C++ compile we perform.
591 GLIBCXX_INCLUDES="\
592 -I$glibcxx_builddir/include/$host_alias \
593 -I$glibcxx_builddir/include \
594 -I$glibcxx_srcdir/libsupc++"
596 # For Canadian crosses, pick this up too.
597 if test $CANADIAN = yes; then
598 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
599 fi
601 # Stuff in the actual top level. Currently only used by libsupc++ to
602 # get unwind* headers from the gcc dir.
603 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
604 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
606 # Now, export this to all the little Makefiles....
607 AC_SUBST(GLIBCXX_INCLUDES)
608 AC_SUBST(TOPLEVEL_INCLUDES)
609 ])
612 dnl
613 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
614 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
615 dnl
616 dnl Substs:
617 dnl OPTIMIZE_CXXFLAGS
618 dnl WARN_FLAGS
619 dnl
620 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
621 # Optimization flags that are probably a good idea for thrill-seekers. Just
622 # uncomment the lines below and make, everything else is ready to go...
623 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
624 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
625 AC_SUBST(OPTIMIZE_CXXFLAGS)
627 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
628 AC_SUBST(WARN_FLAGS)
629 ])
632 dnl
633 dnl All installation directory information is determined here.
634 dnl
635 dnl Substs:
636 dnl gxx_install_dir
637 dnl glibcxx_prefixdir
638 dnl glibcxx_toolexecdir
639 dnl glibcxx_toolexeclibdir
640 dnl
641 dnl Assumes cross_compiling bits already done, and with_cross_host in
642 dnl particular.
643 dnl
644 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
645 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
646 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
647 glibcxx_toolexecdir=no
648 glibcxx_toolexeclibdir=no
649 glibcxx_prefixdir=$prefix
651 AC_MSG_CHECKING([for gxx-include-dir])
652 AC_ARG_WITH([gxx-include-dir],
653 AC_HELP_STRING([--with-gxx-include-dir=DIR],
654 [installation directory for include files]),
655 [case "$withval" in
656 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
657 no) gxx_include_dir=no ;;
658 *) gxx_include_dir=$withval ;;
659 esac],
660 [gxx_include_dir=no])
661 AC_MSG_RESULT($gxx_include_dir)
663 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
664 AC_ARG_ENABLE([version-specific-runtime-libs],
665 AC_HELP_STRING([--enable-version-specific-runtime-libs],
666 [Specify that runtime libraries should be installed in a compiler-specific directory]),
667 [case "$enableval" in
668 yes) version_specific_libs=yes ;;
669 no) version_specific_libs=no ;;
670 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
671 esac],
672 [version_specific_libs=no])
673 AC_MSG_RESULT($version_specific_libs)
675 # Default case for install directory for include files.
676 if test $version_specific_libs = no && test $gxx_include_dir = no; then
677 gxx_include_dir='include/c++/${gcc_version}'
678 if test -n "$with_cross_host" &&
679 test x"$with_cross_host" != x"no"; then
680 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
681 else
682 gxx_include_dir='${prefix}/'"$gxx_include_dir"
683 fi
684 fi
686 # Version-specific runtime libs processing.
687 if test $version_specific_libs = yes; then
688 # Need the gcc compiler version to know where to install libraries
689 # and header files if --enable-version-specific-runtime-libs option
690 # is selected. FIXME: these variables are misnamed, there are
691 # no executables installed in _toolexecdir or _toolexeclibdir.
692 if test x"$gxx_include_dir" = x"no"; then
693 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
694 fi
695 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
696 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
697 fi
699 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
700 # Install a library built with a cross compiler in tooldir, not libdir.
701 if test x"$glibcxx_toolexecdir" = x"no"; then
702 if test -n "$with_cross_host" &&
703 test x"$with_cross_host" != x"no"; then
704 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
705 glibcxx_toolexeclibdir='${toolexecdir}/lib'
706 else
707 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
708 glibcxx_toolexeclibdir='${libdir}'
709 fi
710 multi_os_directory=`$CXX -print-multi-os-directory`
711 case $multi_os_directory in
712 .) ;; # Avoid trailing /.
713 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
714 esac
715 fi
717 AC_MSG_CHECKING([for install location])
718 AC_MSG_RESULT($gxx_include_dir)
720 AC_SUBST(glibcxx_prefixdir)
721 AC_SUBST(gxx_include_dir)
722 AC_SUBST(glibcxx_toolexecdir)
723 AC_SUBST(glibcxx_toolexeclibdir)
724 ])
727 dnl
728 dnl GLIBCXX_ENABLE
729 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
730 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
731 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
732 dnl
733 dnl See docs/html/17_intro/configury.html#enable for documentation.
734 dnl
735 m4_define([GLIBCXX_ENABLE],[dnl
736 m4_define([_g_switch],[--enable-$1])dnl
737 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
738 AC_ARG_ENABLE($1,_g_help,
739 m4_bmatch([$5],
740 [^permit ],
741 [[
742 case "$enableval" in
743 m4_bpatsubst([$5],[permit ])) ;;
744 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
745 dnl Idea for future: generate a URL pointing to
746 dnl "onlinedocs/configopts.html#whatever"
747 esac
748 ]],
749 [^$],
750 [[
751 case "$enableval" in
752 yes|no) ;;
753 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
754 esac
755 ]],
756 [[$5]]),
757 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
758 m4_undefine([_g_switch])dnl
759 m4_undefine([_g_help])dnl
760 ])
763 dnl
764 dnl Check for ISO/IEC 9899:1999 "C99" support.
765 dnl
766 dnl --enable-c99 defines _GLIBCXX_USE_C99
767 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
768 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
769 dnl Where DEFAULT is either `yes' or `no'.
770 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
771 dnl
772 AC_DEFUN([GLIBCXX_ENABLE_C99], [
773 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
775 if test x"$enable_c99" = x"yes"; then
777 AC_LANG_SAVE
778 AC_LANG_CPLUSPLUS
780 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
781 # undefined and fake C99 facilities - like pre-standard snprintf - may be
782 # spuriously enabled.
783 # Long term, -std=c++0x could be even better, could manage to explicitely
784 # request C99 facilities to the underlying C headers.
785 ac_save_CXXFLAGS="$CXXFLAGS"
786 CXXFLAGS="$CXXFLAGS -std=c++98"
787 ac_save_LIBS="$LIBS"
788 ac_save_gcc_no_link="$gcc_no_link"
790 if test x$gcc_no_link != xyes; then
791 # Use -fno-exceptions to that the C driver can link these tests without
792 # hitting undefined references to personality routines.
793 CXXFLAGS="$CXXFLAGS -fno-exceptions"
794 AC_CHECK_LIB(m, sin, [
795 LIBS="$LIBS -lm"
796 ], [
797 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
798 gcc_no_link=yes
799 ])
800 fi
802 # Check for the existence of <math.h> functions used if C99 is enabled.
803 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
804 AC_CACHE_VAL(glibcxx_cv_c99_math, [
805 GCC_TRY_COMPILE_OR_LINK(
806 [#include <math.h>
807 volatile double d1, d2;
808 volatile int i;],
809 [i = fpclassify(d1);
810 i = isfinite(d1);
811 i = isinf(d1);
812 i = isnan(d1);
813 i = isnormal(d1);
814 i = signbit(d1);
815 i = isgreater(d1, d2);
816 i = isgreaterequal(d1, d2);
817 i = isless(d1, d2);
818 i = islessequal(d1, d2);
819 i = islessgreater(d1, d2);
820 i = islessgreater(d1, d2);
821 i = isunordered(d1, d2);
822 ],[glibcxx_cv_c99_math=yes], [glibcxx_cv_c99_math=no])
823 ])
824 AC_MSG_RESULT($glibcxx_cv_c99_math)
825 if test x"$glibcxx_cv_c99_math" = x"yes"; then
826 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
827 [Define if C99 functions or macros in <math.h> should be imported
828 in <cmath> in namespace std.])
829 fi
831 # Check for the existence of <complex.h> complex math functions.
832 # This is necessary even though libstdc++ uses the builtin versions
833 # of these functions, because if the builtin cannot be used, a reference
834 # to the library function is emitted.
835 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
836 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
837 glibcxx_cv_c99_complex=no;
838 if test x"$ac_has_complex_h" = x"yes"; then
839 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
840 GCC_TRY_COMPILE_OR_LINK(
841 [#include <complex.h>
842 typedef __complex__ float float_type;
843 typedef __complex__ double double_type;
844 typedef __complex__ long double ld_type;
845 volatile float_type tmpf;
846 volatile double_type tmpd;
847 volatile ld_type tmpld;
848 volatile float f;
849 volatile double d;
850 volatile long double ld;],
851 [f = cabsf(tmpf);
852 f = cargf(tmpf);
853 tmpf = ccosf(tmpf);
854 tmpf = ccoshf(tmpf);
855 tmpf = cexpf(tmpf);
856 tmpf = clogf(tmpf);
857 tmpf = csinf(tmpf);
858 tmpf = csinhf(tmpf);
859 tmpf = csqrtf(tmpf);
860 tmpf = ctanf(tmpf);
861 tmpf = ctanhf(tmpf);
862 tmpf = cpowf(tmpf, tmpf);
863 d = cabs(tmpd);
864 d = carg(tmpd);
865 tmpd = ccos(tmpd);
866 tmpd = ccosh(tmpd);
867 tmpd = cexp(tmpd);
868 tmpd = clog(tmpd);
869 tmpd = csin(tmpd);
870 tmpd = csinh(tmpd);
871 tmpd = csqrt(tmpd);
872 tmpd = ctan(tmpd);
873 tmpd = ctanh(tmpd);
874 tmpd = cpow(tmpd, tmpd);
875 ld = cabsl(tmpld);
876 ld = cargl(tmpld);
877 tmpld = ccosl(tmpld);
878 tmpld = ccoshl(tmpld);
879 tmpld = cexpl(tmpld);
880 tmpld = clogl(tmpld);
881 tmpld = csinl(tmpld);
882 tmpld = csinhl(tmpld);
883 tmpld = csqrtl(tmpld);
884 tmpld = ctanl(tmpld);
885 tmpld = ctanhl(tmpld);
886 tmpld = cpowl(tmpld, tmpld);
887 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
888 fi
889 AC_MSG_RESULT($glibcxx_cv_c99_complex)
890 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
891 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
892 [Define if C99 functions in <complex.h> should be used in
893 <complex>. Using compiler builtins for these functions requires
894 corresponding C99 library functions to be present.])
895 fi
897 # Check for the existence in <stdio.h> of vscanf, et. al.
898 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
899 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
900 GCC_TRY_COMPILE_OR_LINK(
901 [#include <stdio.h>
902 #include <stdarg.h>
903 void foo(char* fmt, ...)
904 {
905 va_list args; va_start(args, fmt);
906 vfscanf(stderr, "%i", args);
907 vscanf("%i", args);
908 vsnprintf(fmt, 0, "%i", args);
909 vsscanf(fmt, "%i", args);
910 }],
911 [snprintf("12", 0, "%i");],
912 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
913 ])
914 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
916 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
917 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
918 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
919 GCC_TRY_COMPILE_OR_LINK(
920 [#include <stdlib.h>
921 volatile float f;
922 volatile long double ld;
923 volatile unsigned long long ll;
924 lldiv_t mydivt;],
925 [char* tmp;
926 f = strtof("gnu", &tmp);
927 ld = strtold("gnu", &tmp);
928 ll = strtoll("gnu", &tmp, 10);
929 ll = strtoull("gnu", &tmp, 10);
930 ll = llabs(10);
931 mydivt = lldiv(10,1);
932 ll = mydivt.quot;
933 ll = mydivt.rem;
934 ll = atoll("10");
935 _Exit(0);
936 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
937 ])
938 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
940 # Check for the existence in <wchar.h> of wcstold, etc.
941 glibcxx_cv_c99_wchar=no;
942 if test x"$ac_has_wchar_h" = xyes &&
943 test x"$ac_has_wctype_h" = xyes; then
944 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
945 AC_TRY_COMPILE([#include <wchar.h>
946 namespace test
947 {
948 using ::wcstold;
949 using ::wcstoll;
950 using ::wcstoull;
951 }
952 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
954 # Checks for wide character functions that may not be present.
955 # Injection of these is wrapped with guard macros.
956 # NB: only put functions here, instead of immediately above, if
957 # absolutely necessary.
958 AC_TRY_COMPILE([#include <wchar.h>
959 namespace test { using ::vfwscanf; } ], [],
960 [AC_DEFINE(HAVE_VFWSCANF,1,
961 [Defined if vfwscanf exists.])],[])
963 AC_TRY_COMPILE([#include <wchar.h>
964 namespace test { using ::vswscanf; } ], [],
965 [AC_DEFINE(HAVE_VSWSCANF,1,
966 [Defined if vswscanf exists.])],[])
968 AC_TRY_COMPILE([#include <wchar.h>
969 namespace test { using ::vwscanf; } ], [],
970 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
972 AC_TRY_COMPILE([#include <wchar.h>
973 namespace test { using ::wcstof; } ], [],
974 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
976 AC_TRY_COMPILE([#include <wctype.h>],
977 [ wint_t t; int i = iswblank(t);],
978 [AC_DEFINE(HAVE_ISWBLANK,1,
979 [Defined if iswblank exists.])],[])
981 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
982 fi
984 # Option parsed, now set things appropriately.
985 if test x"$glibcxx_cv_c99_math" = x"no" ||
986 test x"$glibcxx_cv_c99_complex" = x"no" ||
987 test x"$glibcxx_cv_c99_stdio" = x"no" ||
988 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
989 test x"$glibcxx_cv_c99_wchar" = x"no"; then
990 enable_c99=no;
991 else
992 AC_DEFINE(_GLIBCXX_USE_C99, 1,
993 [Define if C99 functions or macros from <wchar.h>, <math.h>,
994 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
995 fi
997 gcc_no_link="$ac_save_gcc_no_link"
998 LIBS="$ac_save_LIBS"
999 CXXFLAGS="$ac_save_CXXFLAGS"
1000 AC_LANG_RESTORE
1001 fi
1003 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1004 AC_MSG_RESULT($enable_c99)
1005 ])
1008 dnl
1009 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1010 dnl facilities in Chapter 8, "C compatibility".
1011 dnl
1012 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1014 AC_LANG_SAVE
1015 AC_LANG_CPLUSPLUS
1017 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1018 # undefined and fake C99 facilities may be spuriously enabled.
1019 ac_save_CXXFLAGS="$CXXFLAGS"
1020 CXXFLAGS="$CXXFLAGS -std=c++98"
1022 # Check for the existence of <complex.h> complex math functions used
1023 # by tr1/complex.
1024 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1025 ac_c99_complex_tr1=no;
1026 if test x"$ac_has_complex_h" = x"yes"; then
1027 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1028 AC_TRY_COMPILE([#include <complex.h>],
1029 [typedef __complex__ float float_type; float_type tmpf;
1030 cacosf(tmpf);
1031 casinf(tmpf);
1032 catanf(tmpf);
1033 cacoshf(tmpf);
1034 casinhf(tmpf);
1035 catanhf(tmpf);
1036 typedef __complex__ double double_type; double_type tmpd;
1037 cacos(tmpd);
1038 casin(tmpd);
1039 catan(tmpd);
1040 cacosh(tmpd);
1041 casinh(tmpd);
1042 catanh(tmpd);
1043 typedef __complex__ long double ld_type; ld_type tmpld;
1044 cacosl(tmpld);
1045 casinl(tmpld);
1046 catanl(tmpld);
1047 cacoshl(tmpld);
1048 casinhl(tmpld);
1049 catanhl(tmpld);
1050 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1051 fi
1052 AC_MSG_RESULT($ac_c99_complex_tr1)
1053 if test x"$ac_c99_complex_tr1" = x"yes"; then
1054 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1055 [Define if C99 functions in <complex.h> should be used in
1056 <tr1/complex>. Using compiler builtins for these functions
1057 requires corresponding C99 library functions to be present.])
1058 fi
1060 # Check for the existence of <ctype.h> functions.
1061 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1062 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1063 AC_TRY_COMPILE([#include <ctype.h>],
1064 [int ch;
1065 int ret;
1066 ret = isblank(ch);
1067 ],[glibcxx_cv_c99_ctype_tr1=yes], [glibcxx_cv_c99_ctype_tr1=no])
1068 ])
1069 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1070 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1071 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1072 [Define if C99 functions in <ctype.h> should be imported in
1073 <tr1/cctype> in namespace std::tr1.])
1074 fi
1076 # Check for the existence of <fenv.h> functions.
1077 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1078 ac_c99_fenv_tr1=no;
1079 if test x"$ac_has_fenv_h" = x"yes"; then
1080 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1081 AC_TRY_COMPILE([#include <fenv.h>],
1082 [int except, mode;
1083 fexcept_t* pflag;
1084 fenv_t* penv;
1085 int ret;
1086 ret = feclearexcept(except);
1087 ret = fegetexceptflag(pflag, except);
1088 ret = feraiseexcept(except);
1089 ret = fesetexceptflag(pflag, except);
1090 ret = fetestexcept(except);
1091 ret = fegetround();
1092 ret = fesetround(mode);
1093 ret = fegetenv(penv);
1094 ret = feholdexcept(penv);
1095 ret = fesetenv(penv);
1096 ret = feupdateenv(penv);
1097 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1098 fi
1099 AC_MSG_RESULT($ac_c99_fenv_tr1)
1100 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1101 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1102 [Define if C99 functions in <fenv.h> should be imported in
1103 <tr1/cfenv> in namespace std::tr1.])
1104 fi
1106 # Check for the existence of <stdint.h> types.
1107 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1108 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1109 AC_TRY_COMPILE([#include <stdint.h>],
1110 [typedef int8_t my_int8_t;
1111 typedef int16_t my_int16_t;
1112 typedef int32_t my_int32_t;
1113 typedef int64_t my_int64_t;
1114 typedef int_fast8_t my_int_fast8_t;
1115 typedef int_fast16_t my_int_fast16_t;
1116 typedef int_fast32_t my_int_fast32_t;
1117 typedef int_fast64_t my_int_fast64_t;
1118 typedef int_least8_t my_int_least8_t;
1119 typedef int_least16_t my_int_least16_t;
1120 typedef int_least32_t my_int_least32_t;
1121 typedef int_least64_t my_int_least64_t;
1122 typedef intmax_t my_intmax_t;
1123 typedef intptr_t my_intptr_t;
1124 typedef uint8_t my_uint8_t;
1125 typedef uint16_t my_uint16_t;
1126 typedef uint32_t my_uint32_t;
1127 typedef uint64_t my_uint64_t;
1128 typedef uint_fast8_t my_uint_fast8_t;
1129 typedef uint_fast16_t my_uint_fast16_t;
1130 typedef uint_fast32_t my_uint_fast32_t;
1131 typedef uint_fast64_t my_uint_fast64_t;
1132 typedef uint_least8_t my_uint_least8_t;
1133 typedef uint_least16_t my_uint_least16_t;
1134 typedef uint_least32_t my_uint_least32_t;
1135 typedef uint_least64_t my_uint_least64_t;
1136 typedef uintmax_t my_uintmax_t;
1137 typedef uintptr_t my_uintptr_t;
1138 ],[glibcxx_cv_c99_stdint_tr1=yes], [glibcxx_cv_c99_stdint_tr1=no])
1139 ])
1140 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1141 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1142 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1143 [Define if C99 types in <stdint.h> should be imported in
1144 <tr1/cstdint> in namespace std::tr1.])
1145 fi
1147 # Check for the existence of <math.h> functions.
1148 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1149 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1150 AC_TRY_COMPILE([#include <math.h>],
1151 [typedef double_t my_double_t;
1152 typedef float_t my_float_t;
1153 acosh(0.0);
1154 acoshf(0.0f);
1155 acoshl(0.0l);
1156 asinh(0.0);
1157 asinhf(0.0f);
1158 asinhl(0.0l);
1159 atanh(0.0);
1160 atanhf(0.0f);
1161 atanhl(0.0l);
1162 cbrt(0.0);
1163 cbrtf(0.0f);
1164 cbrtl(0.0l);
1165 copysign(0.0, 0.0);
1166 copysignf(0.0f, 0.0f);
1167 copysignl(0.0l, 0.0l);
1168 erf(0.0);
1169 erff(0.0f);
1170 erfl(0.0l);
1171 erfc(0.0);
1172 erfcf(0.0f);
1173 erfcl(0.0l);
1174 exp2(0.0);
1175 exp2f(0.0f);
1176 exp2l(0.0l);
1177 expm1(0.0);
1178 expm1f(0.0f);
1179 expm1l(0.0l);
1180 fdim(0.0, 0.0);
1181 fdimf(0.0f, 0.0f);
1182 fdiml(0.0l, 0.0l);
1183 fma(0.0, 0.0, 0.0);
1184 fmaf(0.0f, 0.0f, 0.0f);
1185 fmal(0.0l, 0.0l, 0.0l);
1186 fmax(0.0, 0.0);
1187 fmaxf(0.0f, 0.0f);
1188 fmaxl(0.0l, 0.0l);
1189 fmin(0.0, 0.0);
1190 fminf(0.0f, 0.0f);
1191 fminl(0.0l, 0.0l);
1192 hypot(0.0, 0.0);
1193 hypotf(0.0f, 0.0f);
1194 hypotl(0.0l, 0.0l);
1195 ilogb(0.0);
1196 ilogbf(0.0f);
1197 ilogbl(0.0l);
1198 lgamma(0.0);
1199 lgammaf(0.0f);
1200 lgammal(0.0l);
1201 llrint(0.0);
1202 llrintf(0.0f);
1203 llrintl(0.0l);
1204 llround(0.0);
1205 llroundf(0.0f);
1206 llroundl(0.0l);
1207 log1p(0.0);
1208 log1pf(0.0f);
1209 log1pl(0.0l);
1210 log2(0.0);
1211 log2f(0.0f);
1212 log2l(0.0l);
1213 logb(0.0);
1214 logbf(0.0f);
1215 logbl(0.0l);
1216 lrint(0.0);
1217 lrintf(0.0f);
1218 lrintl(0.0l);
1219 lround(0.0);
1220 lroundf(0.0f);
1221 lroundl(0.0l);
1222 nan(0);
1223 nanf(0);
1224 nanl(0);
1225 nearbyint(0.0);
1226 nearbyintf(0.0f);
1227 nearbyintl(0.0l);
1228 nextafter(0.0, 0.0);
1229 nextafterf(0.0f, 0.0f);
1230 nextafterl(0.0l, 0.0l);
1231 nexttoward(0.0, 0.0);
1232 nexttowardf(0.0f, 0.0f);
1233 nexttowardl(0.0l, 0.0l);
1234 remainder(0.0, 0.0);
1235 remainderf(0.0f, 0.0f);
1236 remainderl(0.0l, 0.0l);
1237 remquo(0.0, 0.0, 0);
1238 remquo(0.0f, 0.0f, 0);
1239 remquo(0.0l, 0.0l, 0);
1240 rint(0.0);
1241 rintf(0.0f);
1242 rintl(0.0l);
1243 round(0.0);
1244 roundf(0.0f);
1245 roundl(0.0l);
1246 scalbln(0.0, 0l);
1247 scalblnf(0.0f, 0l);
1248 scalblnl(0.0l, 0l);
1249 scalbn(0.0, 0);
1250 scalbnf(0.0f, 0);
1251 scalbnl(0.0l, 0);
1252 tgamma(0.0);
1253 tgammaf(0.0f);
1254 tgammal(0.0l);
1255 trunc(0.0);
1256 truncf(0.0f);
1257 truncl(0.0l);
1258 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1259 ])
1260 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1261 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1262 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1263 [Define if C99 functions or macros in <math.h> should be imported
1264 in <tr1/cmath> in namespace std::tr1.])
1265 fi
1267 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1268 # sense if the previous check fails, per C99, 7.8/1).
1269 ac_c99_inttypes_tr1=no;
1270 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1271 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1272 AC_TRY_COMPILE([#include <inttypes.h>],
1273 [intmax_t i, numer, denom, base;
1274 const char* s;
1275 char** endptr;
1276 intmax_t ret = imaxabs(i);
1277 imaxdiv_t dret = imaxdiv(numer, denom);
1278 ret = strtoimax(s, endptr, base);
1279 uintmax_t uret = strtoumax(s, endptr, base);
1280 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1281 fi
1282 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1283 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1284 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1285 [Define if C99 functions in <inttypes.h> should be imported in
1286 <tr1/cinttypes> in namespace std::tr1.])
1287 fi
1289 # Check for the existence of the <stdbool.h> header.
1290 AC_CHECK_HEADERS(stdbool.h)
1292 CXXFLAGS="$ac_save_CXXFLAGS"
1293 AC_LANG_RESTORE
1294 ])
1296 dnl
1297 dnl Check whether "dev/random" and "dev/urandom" are available for the
1298 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1299 dnl
1300 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1302 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1303 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1304 AC_TRY_RUN([#include <stdio.h>
1305 int main()
1306 {
1307 return !(fopen("/dev/random", "r")
1308 && fopen("/dev/urandom", "r"));
1309 }
1310 ],
1311 [glibcxx_cv_random_tr1=yes], [glibcxx_cv_random_tr1=no],
1312 [glibcxx_cv_random_tr1=no])
1313 ])
1314 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1315 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1316 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1317 [Define if dev/random and dev/urandom are available for
1318 the random_device of TR1 (Chapter 5.1).])
1319 fi
1321 ])
1323 dnl
1324 dnl Check whether macros, etc are present for <system_error>
1325 dnl
1326 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1328 m4_pushdef([n_syserr], [1])dnl
1329 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1330 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1331 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY],
1332 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1333 AC_MSG_CHECKING([for syserr])
1334 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1335 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1336 [int i = syserr;])],
1337 [glibcxx_cv_system_error[]n_syserr=yes],
1338 [glibcxx_cv_system_error[]n_syserr=no])
1339 ])
1340 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1341 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1342 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1343 fi
1344 m4_define([n_syserr], m4_incr(n_syserr))dnl
1345 m4_popdef([SYSERR])dnl
1346 ])
1347 m4_popdef([n_syserr])dnl
1348 ])
1350 dnl
1351 dnl Check whether C++200x's standard layout types are supported.
1352 dnl
1353 AC_DEFUN([GLIBCXX_CHECK_STANDARD_LAYOUT], [
1355 AC_MSG_CHECKING([for ISO C++200x standard layout type support])
1356 AC_CACHE_VAL(ac_standard_layout, [
1357 AC_LANG_SAVE
1358 AC_LANG_CPLUSPLUS
1359 ac_test_CXXFLAGS="${CXXFLAGS+set}"
1360 ac_save_CXXFLAGS="$CXXFLAGS"
1361 CXXFLAGS='-std=gnu++0x'
1363 AC_TRY_COMPILE([struct b
1364 {
1365 bool t;
1367 // Need standard layout relaxation from POD
1368 private:
1369 b& operator=(const b&);
1370 b(const b&);
1371 };
1373 int main()
1374 {
1375 b tst1 = { false };
1376 return 0;
1377 }],,
1378 [ac_standard_layout=yes], [ac_standard_layout=no])
1380 CXXFLAGS="$ac_save_CXXFLAGS"
1381 AC_LANG_RESTORE
1382 ])
1383 AC_MSG_RESULT($ac_standard_layout)
1384 if test x"$ac_standard_layout" = x"yes"; then
1385 AC_DEFINE(_GLIBCXX_USE_STANDARD_LAYOUT, 1,
1386 [Define if standard layout types are supported in C++200x.])
1387 fi
1388 ])
1390 dnl
1391 dnl Check for what type of C headers to use.
1392 dnl
1393 dnl --enable-cheaders= [does stuff].
1394 dnl --disable-cheaders [does not do anything, really].
1395 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1396 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1397 dnl
1398 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1399 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1400 [construct "C" headers for g++], [permit c|c_std|c_global])
1401 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1403 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1405 # Allow overrides to configure.host here.
1406 if test $enable_cheaders = c_global; then
1407 c_compatibility=yes
1408 fi
1410 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1411 c_extra=yes
1412 fi
1414 AC_SUBST(C_INCLUDE_DIR)
1415 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1416 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1417 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1418 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1419 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1420 ])
1423 dnl
1424 dnl Check for which locale library to use. The choice is mapped to
1425 dnl a subdirectory of config/locale.
1426 dnl
1427 dnl Default is generic.
1428 dnl
1429 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1430 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1431 [use MODEL for target locale package],
1432 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1434 # Deal with gettext issues. Default to not using it (=no) until we detect
1435 # support for it later. Let the user turn it off via --e/d, but let that
1436 # default to on for easier handling.
1437 USE_NLS=no
1438 AC_ARG_ENABLE(nls,
1439 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1440 [],
1441 [enable_nls=yes])
1443 # Either a known packaage, or "auto"
1444 if test $enable_clocale = no || test $enable_clocale = yes; then
1445 enable_clocale=auto
1446 fi
1447 enable_clocale_flag=$enable_clocale
1449 # Probe for locale model to use if none specified.
1450 # Default to "generic".
1451 if test $enable_clocale_flag = auto; then
1452 case ${target_os} in
1453 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1454 enable_clocale_flag=gnu
1455 ;;
1456 darwin* | freebsd*)
1457 enable_clocale_flag=darwin
1458 ;;
1459 *)
1460 enable_clocale_flag=generic
1461 ;;
1462 esac
1463 fi
1465 # Sanity check model, and test for special functionality.
1466 if test $enable_clocale_flag = gnu; then
1467 AC_EGREP_CPP([_GLIBCXX_ok], [
1468 #include <features.h>
1469 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1470 _GLIBCXX_ok
1471 #endif
1472 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1474 if test $enable_clocale = auto; then
1475 # Test for bugs early in glibc-2.2.x series
1476 AC_TRY_RUN([
1477 #define _GNU_SOURCE 1
1478 #include <locale.h>
1479 #include <string.h>
1480 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1481 extern __typeof(newlocale) __newlocale;
1482 extern __typeof(duplocale) __duplocale;
1483 extern __typeof(strcoll_l) __strcoll_l;
1484 #endif
1485 int main()
1486 {
1487 const char __one[] = "Äuglein Augmen";
1488 const char __two[] = "Äuglein";
1489 int i;
1490 int j;
1491 __locale_t loc;
1492 __locale_t loc_dup;
1493 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1494 loc_dup = __duplocale(loc);
1495 i = __strcoll_l(__one, __two, loc);
1496 j = __strcoll_l(__one, __two, loc_dup);
1497 return 0;
1498 }
1499 ],
1500 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1501 [enable_clocale_flag=generic])
1502 fi
1504 # Set it to scream when it hurts.
1505 ac_save_CFLAGS="$CFLAGS"
1506 CFLAGS="-Wimplicit-function-declaration -Werror"
1508 # Use strxfrm_l if available.
1509 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1510 #include <string.h>
1511 #include <locale.h>],
1512 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1513 AC_DEFINE(HAVE_STRXFRM_L, 1,
1514 [Define if strxfrm_l is available in <string.h>.]),)
1516 # Use strerror_l if available.
1517 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1518 #include <string.h>
1519 #include <locale.h>],
1520 [__locale_t loc; strerror_l(5, loc);],
1521 AC_DEFINE(HAVE_STRERROR_L, 1,
1522 [Define if strerror_l is available in <string.h>.]),)
1524 CFLAGS="$ac_save_CFLAGS"
1525 fi
1527 # Perhaps use strerror_r if available, and strerror_l isn't.
1528 ac_save_CFLAGS="$CFLAGS"
1529 CFLAGS="-Wimplicit-function-declaration -Werror"
1530 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1531 #include <string.h>
1532 #include <locale.h>],
1533 [char s[128]; strerror_r(5, s, 128);],
1534 AC_DEFINE(HAVE_STRERROR_R, 1,
1535 [Define if strerror_r is available in <string.h>.]),)
1536 CFLAGS="$ac_save_CFLAGS"
1538 # Set configure bits for specified locale package
1539 AC_MSG_CHECKING([for C locale to use])
1540 case ${enable_clocale_flag} in
1541 generic)
1542 AC_MSG_RESULT(generic)
1544 CLOCALE_H=config/locale/generic/c_locale.h
1545 CLOCALE_CC=config/locale/generic/c_locale.cc
1546 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1547 CCOLLATE_CC=config/locale/generic/collate_members.cc
1548 CCTYPE_CC=config/locale/generic/ctype_members.cc
1549 CMESSAGES_H=config/locale/generic/messages_members.h
1550 CMESSAGES_CC=config/locale/generic/messages_members.cc
1551 CMONEY_CC=config/locale/generic/monetary_members.cc
1552 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1553 CTIME_H=config/locale/generic/time_members.h
1554 CTIME_CC=config/locale/generic/time_members.cc
1555 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1556 ;;
1557 darwin)
1558 AC_MSG_RESULT(darwin or freebsd)
1560 CLOCALE_H=config/locale/generic/c_locale.h
1561 CLOCALE_CC=config/locale/generic/c_locale.cc
1562 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1563 CCOLLATE_CC=config/locale/generic/collate_members.cc
1564 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1565 CMESSAGES_H=config/locale/generic/messages_members.h
1566 CMESSAGES_CC=config/locale/generic/messages_members.cc
1567 CMONEY_CC=config/locale/generic/monetary_members.cc
1568 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1569 CTIME_H=config/locale/generic/time_members.h
1570 CTIME_CC=config/locale/generic/time_members.cc
1571 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1572 ;;
1574 gnu)
1575 AC_MSG_RESULT(gnu)
1577 # Declare intention to use gettext, and add support for specific
1578 # languages.
1579 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1580 ALL_LINGUAS="de fr"
1582 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1583 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1584 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1585 USE_NLS=yes
1586 fi
1587 # Export the build objects.
1588 for ling in $ALL_LINGUAS; do \
1589 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1590 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1591 done
1592 AC_SUBST(glibcxx_MOFILES)
1593 AC_SUBST(glibcxx_POFILES)
1595 CLOCALE_H=config/locale/gnu/c_locale.h
1596 CLOCALE_CC=config/locale/gnu/c_locale.cc
1597 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1598 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1599 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1600 CMESSAGES_H=config/locale/gnu/messages_members.h
1601 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1602 CMONEY_CC=config/locale/gnu/monetary_members.cc
1603 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1604 CTIME_H=config/locale/gnu/time_members.h
1605 CTIME_CC=config/locale/gnu/time_members.cc
1606 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1607 ;;
1608 ieee_1003.1-2001)
1609 AC_MSG_RESULT(IEEE 1003.1)
1611 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1612 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1613 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1614 CCOLLATE_CC=config/locale/generic/collate_members.cc
1615 CCTYPE_CC=config/locale/generic/ctype_members.cc
1616 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1617 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1618 CMONEY_CC=config/locale/generic/monetary_members.cc
1619 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1620 CTIME_H=config/locale/generic/time_members.h
1621 CTIME_CC=config/locale/generic/time_members.cc
1622 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1623 ;;
1624 esac
1626 # This is where the testsuite looks for locale catalogs, using the
1627 # -DLOCALEDIR define during testsuite compilation.
1628 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1629 AC_SUBST(glibcxx_localedir)
1631 # A standalone libintl (e.g., GNU libintl) may be in use.
1632 if test $USE_NLS = yes; then
1633 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1634 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1635 fi
1636 if test $USE_NLS = yes; then
1637 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1638 [Define if NLS translations are to be used.])
1639 fi
1641 AC_SUBST(USE_NLS)
1642 AC_SUBST(CLOCALE_H)
1643 AC_SUBST(CMESSAGES_H)
1644 AC_SUBST(CCODECVT_CC)
1645 AC_SUBST(CCOLLATE_CC)
1646 AC_SUBST(CCTYPE_CC)
1647 AC_SUBST(CMESSAGES_CC)
1648 AC_SUBST(CMONEY_CC)
1649 AC_SUBST(CNUMERIC_CC)
1650 AC_SUBST(CTIME_H)
1651 AC_SUBST(CTIME_CC)
1652 AC_SUBST(CLOCALE_CC)
1653 AC_SUBST(CLOCALE_INTERNAL_H)
1654 ])
1657 dnl
1658 dnl Check for which std::allocator base class to use. The choice is
1659 dnl mapped from a subdirectory of include/ext.
1660 dnl
1661 dnl Default is new.
1662 dnl
1663 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1664 AC_MSG_CHECKING([for std::allocator base class])
1665 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1666 [use KIND for target std::allocator base],
1667 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1669 # If they didn't use this option switch, or if they specified --enable
1670 # with no specific model, we'll have to look for one. If they
1671 # specified --disable (???), do likewise.
1672 if test $enable_libstdcxx_allocator = no ||
1673 test $enable_libstdcxx_allocator = yes;
1674 then
1675 enable_libstdcxx_allocator=auto
1676 fi
1678 # Either a known package, or "auto". Auto implies the default choice
1679 # for a particular platform.
1680 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1682 # Probe for host-specific support if no specific model is specified.
1683 # Default to "new".
1684 if test $enable_libstdcxx_allocator_flag = auto; then
1685 case ${target_os} in
1686 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1687 enable_libstdcxx_allocator_flag=new
1688 ;;
1689 *)
1690 enable_libstdcxx_allocator_flag=new
1691 ;;
1692 esac
1693 fi
1694 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1697 # Set configure bits for specified locale package
1698 case ${enable_libstdcxx_allocator_flag} in
1699 bitmap)
1700 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1701 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1702 ;;
1703 malloc)
1704 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1705 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1706 ;;
1707 mt)
1708 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1709 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1710 ;;
1711 new)
1712 ALLOCATOR_H=config/allocator/new_allocator_base.h
1713 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1714 ;;
1715 pool)
1716 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1717 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1718 ;;
1719 esac
1721 AC_SUBST(ALLOCATOR_H)
1722 AC_SUBST(ALLOCATOR_NAME)
1723 ])
1726 dnl
1727 dnl Check for whether the Boost-derived checks should be turned on.
1728 dnl
1729 dnl --enable-concept-checks turns them on.
1730 dnl --disable-concept-checks leaves them off.
1731 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1732 dnl Where DEFAULT is either `yes' or `no'.
1733 dnl
1734 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1735 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1736 if test $enable_concept_checks = yes; then
1737 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1738 [Define to use concept checking code from the boost libraries.])
1739 fi
1740 ])
1742 dnl
1743 dnl Check for parallel mode pre-requisites, including OpenMP support.
1744 dnl
1745 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
1746 dnl
1747 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
1749 enable_parallel=no;
1751 # See if configured libgomp/omp.h exists. (libgomp may be in
1752 # noconfigdirs but not explicitly disabled.)
1753 if test -f $glibcxx_builddir/../libgomp/omp.h; then
1754 enable_parallel=yes;
1755 else
1756 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
1757 fi
1759 AC_MSG_CHECKING([for parallel mode support])
1760 AC_MSG_RESULT([$enable_parallel])
1761 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
1762 ])
1765 dnl
1766 dnl Check for which I/O library to use: stdio, or something specific.
1767 dnl
1768 dnl Default is stdio.
1769 dnl
1770 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1771 AC_MSG_CHECKING([for underlying I/O to use])
1772 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1773 [use target-specific I/O package], [permit stdio])
1775 # Now that libio has been removed, you can have any color you want as long
1776 # as it's black. This is one big no-op until other packages are added, but
1777 # showing the framework never hurts.
1778 case ${enable_cstdio} in
1779 stdio)
1780 CSTDIO_H=config/io/c_io_stdio.h
1781 BASIC_FILE_H=config/io/basic_file_stdio.h
1782 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1783 AC_MSG_RESULT(stdio)
1784 ;;
1785 esac
1787 AC_SUBST(CSTDIO_H)
1788 AC_SUBST(BASIC_FILE_H)
1789 AC_SUBST(BASIC_FILE_CC)
1790 ])
1793 dnl
1794 dnl Check for "unusual" flags to pass to the compiler while building.
1795 dnl
1796 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1797 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1798 dnl --disable-cxx-flags passes nothing.
1799 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1800 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1801 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1802 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1803 dnl If "default flags" is an empty string, the effect is the same
1804 dnl as --disable or --enable=no.
1805 dnl
1806 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1807 AC_MSG_CHECKING([for extra compiler flags for building])
1808 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1809 [pass compiler FLAGS when building library],
1810 [case "x$enable_cxx_flags" in
1811 xno | x) enable_cxx_flags= ;;
1812 x-*) ;;
1813 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1814 esac])
1816 # Run through flags (either default or command-line) and set anything
1817 # extra (e.g., #defines) that must accompany particular g++ options.
1818 if test -n "$enable_cxx_flags"; then
1819 for f in $enable_cxx_flags; do
1820 case "$f" in
1821 -fhonor-std) ;;
1822 -*) ;;
1823 *) # and we're trying to pass /what/ exactly?
1824 AC_MSG_ERROR([compiler flags start with a -]) ;;
1825 esac
1826 done
1827 fi
1829 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1830 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1831 AC_SUBST(EXTRA_CXX_FLAGS)
1832 ])
1835 dnl
1836 dnl Check to see if debugging libraries are to be built.
1837 dnl
1838 dnl --enable-libstdcxx-debug
1839 dnl builds a separate set of debugging libraries in addition to the
1840 dnl normal (shared, static) libstdc++ binaries.
1841 dnl
1842 dnl --disable-libstdcxx-debug
1843 dnl builds only one (non-debug) version of libstdc++.
1844 dnl
1845 dnl --enable-libstdcxx-debug-flags=FLAGS
1846 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1847 dnl
1848 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1849 dnl Where DEFAULT is either `yes' or `no'.
1850 dnl
1851 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1852 AC_MSG_CHECKING([for additional debug build])
1853 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1854 AC_MSG_RESULT($enable_libstdcxx_debug)
1855 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1856 ])
1859 dnl
1860 dnl Check for explicit debug flags.
1861 dnl
1862 dnl --enable-libstdcxx-debug-flags='-O1'
1863 dnl is a general method for passing flags to be used when
1864 dnl building debug libraries with --enable-debug.
1865 dnl
1866 dnl --disable-libstdcxx-debug-flags does nothing.
1867 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1868 dnl If "default flags" is an empty string, the effect is the same
1869 dnl as --disable or --enable=no.
1870 dnl
1871 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1872 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1873 [pass compiler FLAGS when building debug library],
1874 [case "x$enable_libstdcxx_debug_flags" in
1875 xno | x) enable_libstdcxx_debug_flags= ;;
1876 x-*) ;;
1877 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1878 esac])
1880 # Option parsed, now set things appropriately
1881 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1882 AC_SUBST(DEBUG_FLAGS)
1884 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1885 ])
1888 dnl
1889 dnl Check if the user only wants a freestanding library implementation.
1890 dnl
1891 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1892 dnl installing only the headers required by [17.4.1.3] and the language
1893 dnl support library. More than that will be built (to keep the Makefiles
1894 dnl conveniently clean), but not installed.
1895 dnl
1896 dnl Sets:
1897 dnl is_hosted (yes/no)
1898 dnl
1899 dnl Defines:
1900 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1901 dnl
1902 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1903 AC_ARG_ENABLE([hosted-libstdcxx],
1904 AC_HELP_STRING([--disable-hosted-libstdcxx],
1905 [only build freestanding C++ runtime support]),,
1906 [case "$host" in
1907 arm*-*-symbianelf*)
1908 enable_hosted_libstdcxx=no
1909 ;;
1910 *)
1911 enable_hosted_libstdcxx=yes
1912 ;;
1913 esac])
1914 if test "$enable_hosted_libstdcxx" = no; then
1915 AC_MSG_NOTICE([Only freestanding libraries will be built])
1916 is_hosted=no
1917 hosted_define=0
1918 enable_abi_check=no
1919 enable_libstdcxx_pch=no
1920 else
1921 is_hosted=yes
1922 hosted_define=1
1923 fi
1924 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1925 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1926 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1927 ])
1930 dnl
1931 dnl Check for template specializations for the 'long long' type.
1932 dnl The result determines only whether 'long long' I/O is enabled; things
1933 dnl like numeric_limits<> specializations are always available.
1934 dnl
1935 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1936 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1937 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1938 dnl Where DEFAULT is either `yes' or `no'.
1939 dnl
1940 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1941 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1942 if test $enable_long_long = yes; then
1943 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1944 [Define if code specialized for long long should be used.])
1945 fi
1946 AC_MSG_CHECKING([for enabled long long specializations])
1947 AC_MSG_RESULT([$enable_long_long])
1948 ])
1951 dnl
1952 dnl Check for template specializations for the 'wchar_t' type.
1953 dnl
1954 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1955 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1956 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1957 dnl Where DEFAULT is either `yes' or `no'.
1958 dnl
1959 dnl Necessary support must also be present.
1960 dnl
1961 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1962 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1964 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1965 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1966 AC_MSG_CHECKING([for mbstate_t])
1967 AC_TRY_COMPILE([#include <wchar.h>],
1968 [mbstate_t teststate;],
1969 have_mbstate_t=yes, have_mbstate_t=no)
1970 AC_MSG_RESULT($have_mbstate_t)
1971 if test x"$have_mbstate_t" = xyes; then
1972 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1973 fi
1975 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1976 # ac_has_wchar_h.
1977 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1979 if test x"$enable_wchar_t" = x"yes"; then
1981 AC_LANG_SAVE
1982 AC_LANG_CPLUSPLUS
1984 if test x"$ac_has_wchar_h" = xyes &&
1985 test x"$ac_has_wctype_h" = xyes; then
1986 AC_TRY_COMPILE([#include <wchar.h>
1987 #include <stddef.h>
1988 wint_t i;
1989 long l = WEOF;
1990 long j = WCHAR_MIN;
1991 long k = WCHAR_MAX;
1992 namespace test
1993 {
1994 using ::btowc;
1995 using ::fgetwc;
1996 using ::fgetws;
1997 using ::fputwc;
1998 using ::fputws;
1999 using ::fwide;
2000 using ::fwprintf;
2001 using ::fwscanf;
2002 using ::getwc;
2003 using ::getwchar;
2004 using ::mbrlen;
2005 using ::mbrtowc;
2006 using ::mbsinit;
2007 using ::mbsrtowcs;
2008 using ::putwc;
2009 using ::putwchar;
2010 using ::swprintf;
2011 using ::swscanf;
2012 using ::ungetwc;
2013 using ::vfwprintf;
2014 using ::vswprintf;
2015 using ::vwprintf;
2016 using ::wcrtomb;
2017 using ::wcscat;
2018 using ::wcschr;
2019 using ::wcscmp;
2020 using ::wcscoll;
2021 using ::wcscpy;
2022 using ::wcscspn;
2023 using ::wcsftime;
2024 using ::wcslen;
2025 using ::wcsncat;
2026 using ::wcsncmp;
2027 using ::wcsncpy;
2028 using ::wcspbrk;
2029 using ::wcsrchr;
2030 using ::wcsrtombs;
2031 using ::wcsspn;
2032 using ::wcsstr;
2033 using ::wcstod;
2034 using ::wcstok;
2035 using ::wcstol;
2036 using ::wcstoul;
2037 using ::wcsxfrm;
2038 using ::wctob;
2039 using ::wmemchr;
2040 using ::wmemcmp;
2041 using ::wmemcpy;
2042 using ::wmemmove;
2043 using ::wmemset;
2044 using ::wprintf;
2045 using ::wscanf;
2046 }
2047 ],[],[], [enable_wchar_t=no])
2048 else
2049 enable_wchar_t=no
2050 fi
2052 AC_LANG_RESTORE
2053 fi
2055 if test x"$enable_wchar_t" = x"yes"; then
2056 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2057 [Define if code specialized for wchar_t should be used.])
2058 fi
2060 AC_MSG_CHECKING([for enabled wchar_t specializations])
2061 AC_MSG_RESULT([$enable_wchar_t])
2062 ])
2065 dnl
2066 dnl Check to see if building and using a C++ precompiled header can be done.
2067 dnl
2068 dnl --enable-libstdcxx-pch=yes
2069 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2070 dnl may work, after some light-hearted attempts to puzzle out compiler
2071 dnl support, flip bits on in include/Makefile.am
2072 dnl
2073 dnl --disable-libstdcxx-pch
2074 dnl turns off attempts to use or build stdc++.h.gch.
2075 dnl
2076 dnl Substs:
2077 dnl glibcxx_PCHFLAGS
2078 dnl
2079 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2080 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2081 if test $enable_libstdcxx_pch = yes; then
2082 AC_CACHE_CHECK([for compiler with PCH support],
2083 [glibcxx_cv_prog_CXX_pch],
2084 [ac_save_CXXFLAGS="$CXXFLAGS"
2085 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2086 AC_LANG_SAVE
2087 AC_LANG_CPLUSPLUS
2088 echo '#include <math.h>' > conftest.h
2089 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2090 -o conftest.h.gch 1>&5 2>&1 &&
2091 echo '#error "pch failed"' > conftest.h &&
2092 echo '#include "conftest.h"' > conftest.cc &&
2093 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2094 then
2095 glibcxx_cv_prog_CXX_pch=yes
2096 else
2097 glibcxx_cv_prog_CXX_pch=no
2098 fi
2099 rm -f conftest*
2100 CXXFLAGS=$ac_save_CXXFLAGS
2101 AC_LANG_RESTORE
2102 ])
2103 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2104 fi
2106 AC_MSG_CHECKING([for enabled PCH])
2107 AC_MSG_RESULT([$enable_libstdcxx_pch])
2109 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2110 if test $enable_libstdcxx_pch = yes; then
2111 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2112 else
2113 glibcxx_PCHFLAGS=""
2114 fi
2115 AC_SUBST(glibcxx_PCHFLAGS)
2116 ])
2119 dnl
2120 dnl Check for atomic builtins.
2121 dnl See:
2122 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2123 dnl
2124 dnl This checks to see if the host supports the compiler-generated
2125 dnl builtins for atomic operations for various integral sizes. Note, this
2126 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2127 dnl that are used should be checked.
2128 dnl
2129 dnl Note:
2130 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2131 dnl see: CHECK_SYNC_FETCH_AND_ADD
2132 dnl
2133 dnl Defines:
2134 dnl _GLIBCXX_ATOMIC_BUILTINS_1
2135 dnl _GLIBCXX_ATOMIC_BUILTINS_4
2136 dnl
2137 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2138 AC_LANG_SAVE
2139 AC_LANG_CPLUSPLUS
2140 old_CXXFLAGS="$CXXFLAGS"
2142 # Compile unoptimized.
2143 CXXFLAGS='-O0 -S'
2145 # Fake what AC_TRY_COMPILE does, without linking as this is
2146 # unnecessary for a builtins test.
2148 cat > conftest.$ac_ext << EOF
2149 [#]line __oline__ "configure"
2150 int main()
2151 {
2152 // NB: _Atomic_word not necessarily int.
2153 typedef int atomic_type;
2154 atomic_type c1;
2155 atomic_type c2;
2156 const atomic_type c3(0);
2157 __sync_fetch_and_add(&c1, c2);
2158 __sync_val_compare_and_swap(&c1, c3, c2);
2159 __sync_lock_test_and_set(&c1, c3);
2160 __sync_lock_release(&c1);
2161 __sync_synchronize();
2162 return 0;
2163 }
2164 EOF
2166 AC_MSG_CHECKING([for atomic builtins for int])
2167 if AC_TRY_EVAL(ac_compile); then
2168 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2169 enable_atomic_builtinsi=no
2170 else
2171 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2172 [Define if builtin atomic operations for int are supported on this host.])
2173 enable_atomic_builtinsi=yes
2174 fi
2175 fi
2176 AC_MSG_RESULT($enable_atomic_builtinsi)
2177 rm -f conftest*
2179 cat > conftest.$ac_ext << EOF
2180 [#]line __oline__ "configure"
2181 int main()
2182 {
2183 typedef bool atomic_type;
2184 atomic_type c1;
2185 atomic_type c2;
2186 const atomic_type c3(0);
2187 __sync_fetch_and_add(&c1, c2);
2188 __sync_val_compare_and_swap(&c1, c3, c2);
2189 __sync_lock_test_and_set(&c1, c3);
2190 __sync_lock_release(&c1);
2191 __sync_synchronize();
2192 return 0;
2193 }
2194 EOF
2196 AC_MSG_CHECKING([for atomic builtins for bool])
2197 if AC_TRY_EVAL(ac_compile); then
2198 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2199 enable_atomic_builtinsb=no
2200 else
2201 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2202 [Define if builtin atomic operations for bool are supported on this host.])
2203 enable_atomic_builtinsb=yes
2204 fi
2205 fi
2206 AC_MSG_RESULT($enable_atomic_builtinsb)
2207 rm -f conftest*
2209 CXXFLAGS="$old_CXXFLAGS"
2210 AC_LANG_RESTORE
2212 # Set atomicity_dir to builtins if either of above tests pass.
2213 if test $enable_atomic_builtinsi = yes || test $enable_atomic_builtinsb = yes ; then
2214 atomicity_dir=cpu/generic/atomicity_builtins
2215 fi
2217 # If still generic, set to mutex.
2218 if test $atomicity_dir = "cpu/generic" ; then
2219 atomicity_dir=cpu/generic/atomicity_mutex
2220 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2221 if test $target_thread_file = single; then
2222 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2223 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2224 else
2225 AC_MSG_WARN([They will be faked using a mutex.])
2226 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2227 fi
2228 fi
2230 ])
2233 dnl
2234 dnl Check for exception handling support. If an explicit enable/disable
2235 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2236 dnl target may or may not support call frame exceptions.
2237 dnl
2238 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2239 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2240 dnl Neither one forces an attempt at detection.
2241 dnl
2242 dnl Defines:
2243 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2244 dnl
2245 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2246 AC_MSG_CHECKING([for exception model to use])
2247 AC_LANG_SAVE
2248 AC_LANG_CPLUSPLUS
2249 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2250 [force use of builtin_setjmp for exceptions],
2251 [permit yes|no|auto])
2253 if test $enable_sjlj_exceptions = auto; then
2254 # Botheration. Now we've got to detect the exception model. Link tests
2255 # against libgcc.a are problematic since we've not been given proper -L
2256 # bits for single-tree newlib and libgloss.
2257 #
2258 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2259 cat > conftest.$ac_ext << EOF
2260 [#]line __oline__ "configure"
2261 struct S { ~S(); };
2262 void bar();
2263 void foo()
2264 {
2265 S s;
2266 bar();
2267 }
2268 EOF
2269 old_CXXFLAGS="$CXXFLAGS"
2270 CXXFLAGS=-S
2271 if AC_TRY_EVAL(ac_compile); then
2272 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2273 enable_sjlj_exceptions=yes
2274 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2275 enable_sjlj_exceptions=no
2276 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2277 enable_sjlj_exceptions=no
2278 fi
2279 fi
2280 CXXFLAGS="$old_CXXFLAGS"
2281 rm -f conftest*
2282 fi
2284 # This is a tad weird, for hysterical raisins. We have to map
2285 # enable/disable to two different models.
2286 case $enable_sjlj_exceptions in
2287 yes)
2288 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2289 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2290 ac_exception_model_name=sjlj
2291 ;;
2292 no)
2293 ac_exception_model_name="call frame"
2294 ;;
2295 *)
2296 AC_MSG_ERROR([unable to detect exception model])
2297 ;;
2298 esac
2299 AC_LANG_RESTORE
2300 AC_MSG_RESULT($ac_exception_model_name)
2301 ])
2304 dnl
2305 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2306 dnl
2307 dnl --enable-visibility enables attempt to use visibility attributes.
2308 dnl --disable-visibility turns off all use of visibility attributes.
2309 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2310 dnl Where DEFAULT is 'yes'.
2311 dnl
2312 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2313 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2315 if test x$enable_visibility = xyes ; then
2316 dnl all hail libgfortran
2317 dnl Check whether the target supports hidden visibility.
2318 AC_CACHE_CHECK([whether the target supports hidden visibility],
2319 glibcxx_cv_have_attribute_visibility, [
2320 save_CFLAGS="$CFLAGS"
2321 CFLAGS="$CFLAGS -Werror"
2322 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2323 [], glibcxx_cv_have_attribute_visibility=yes,
2324 glibcxx_cv_have_attribute_visibility=no)
2325 CFLAGS="$save_CFLAGS"])
2326 if test $glibcxx_cv_have_attribute_visibility = no; then
2327 enable_visibility=no
2328 fi
2329 fi
2331 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2332 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2333 ])
2336 dnl
2337 dnl Add version tags to symbols in shared library (or not), additionally
2338 dnl marking other symbols as private/local (or not).
2339 dnl
2340 dnl --enable-symvers=style adds a version script to the linker call when
2341 dnl creating the shared library. The choice of version script is
2342 dnl controlled by 'style'.
2343 dnl --disable-symvers does not.
2344 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2345 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2346 dnl choose a default style based on linker characteristics. Passing
2347 dnl 'no' disables versioning.
2348 dnl
2349 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2351 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2352 [enables symbol versioning of the shared library],
2353 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2355 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2356 # don't know enough about $LD to do tricks...
2357 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2359 # Turn a 'yes' into a suitable default.
2360 if test x$enable_symvers = xyes ; then
2361 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2362 enable_symvers=no
2363 else
2364 if test $with_gnu_ld = yes ; then
2365 enable_symvers=gnu
2366 else
2367 case ${target_os} in
2368 darwin*)
2369 enable_symvers=darwin ;;
2370 *)
2371 enable_symvers=no ;;
2372 esac
2373 fi
2374 fi
2375 fi
2377 # Check to see if 'darwin' or 'darwin-export' can win.
2378 if test x$enable_symvers = xdarwin-export ; then
2379 enable_symvers=darwin
2380 fi
2382 # Check to see if 'gnu' can win.
2383 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2384 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2385 AC_MSG_CHECKING([for shared libgcc])
2386 ac_save_CFLAGS="$CFLAGS"
2387 CFLAGS=' -lgcc_s'
2388 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2389 CFLAGS="$ac_save_CFLAGS"
2390 if test $glibcxx_shared_libgcc = no; then
2391 cat > conftest.c <<EOF
2392 int main (void) { return 0; }
2393 EOF
2394 changequote(,)dnl
2395 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2396 -shared -shared-libgcc -o conftest.so \
2397 conftest.c -v 2>&1 >/dev/null \
2398 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2399 changequote([,])dnl
2400 rm -f conftest.c conftest.so
2401 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2402 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2403 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2404 CFLAGS="$ac_save_CFLAGS"
2405 fi
2406 fi
2407 AC_MSG_RESULT($glibcxx_shared_libgcc)
2409 # For GNU ld, we need at least this version. The format is described in
2410 # GLIBCXX_CHECK_LINKER_FEATURES above.
2411 glibcxx_min_gnu_ld_version=21400
2413 # If no shared libgcc, can't win.
2414 if test $glibcxx_shared_libgcc != yes; then
2415 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2416 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2417 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2418 enable_symvers=no
2419 elif test $with_gnu_ld != yes ; then
2420 # just fail for now
2421 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2422 AC_MSG_WARN([=== you are not using the GNU linker.])
2423 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2424 enable_symvers=no
2425 elif test $glibcxx_ld_is_gold = yes ; then
2426 : All versions of gold support symbol versioning.
2427 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2428 # The right tools, the right setup, but too old. Fallbacks?
2429 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2430 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2431 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2432 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2433 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2434 enable_symvers=no
2435 fi
2436 fi
2438 # Everything parsed; figure out what file to use.
2439 case $enable_symvers in
2440 no)
2441 SYMVER_FILE=config/abi/pre/none.ver
2442 ;;
2443 gnu)
2444 SYMVER_FILE=config/abi/pre/gnu.ver
2445 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2446 [Define to use GNU versioning in the shared library.])
2447 ;;
2448 gnu-versioned-namespace)
2449 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2450 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2451 [Define to use GNU namespace versioning in the shared library.])
2452 ;;
2453 darwin)
2454 SYMVER_FILE=config/abi/pre/gnu.ver
2455 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2456 [Define to use darwin versioning in the shared library.])
2457 ;;
2458 esac
2460 if test x$enable_symvers != xno ; then
2461 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2462 [Define to use symbol versioning in the shared library.])
2463 fi
2465 AC_SUBST(SYMVER_FILE)
2466 AC_SUBST(port_specific_symbol_files)
2467 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2468 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2469 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2470 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2471 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2473 # Now, set up compatibility support, if any.
2474 # In addition, need this to deal with std::size_t mangling in
2475 # src/compatibility.cc. In a perfect world, could use
2476 # typeid(std::size_t).name()[0] to do direct substitution.
2477 AC_MSG_CHECKING([for size_t as unsigned int])
2478 ac_save_CFLAGS="$CFLAGS"
2479 CFLAGS="-Werror"
2480 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2481 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2482 CFLAGS=$ac_save_CFLAGS
2483 if test "$glibcxx_size_t_is_i" = yes; then
2484 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2485 fi
2486 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2488 AC_MSG_CHECKING([for ptrdiff_t as int])
2489 ac_save_CFLAGS="$CFLAGS"
2490 CFLAGS="-Werror"
2491 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2492 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2493 CFLAGS=$ac_save_CFLAGS
2494 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2495 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2496 fi
2497 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2498 ])
2501 dnl
2502 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2503 dnl We must stage the required headers so that they will be installed
2504 dnl with the library (unlike libgcc, the STL implementation is provided
2505 dnl solely within headers). Since we must not inject random user-space
2506 dnl macro names into user-provided C++ code, we first stage into <file>-in
2507 dnl and process to <file> with an output command. The reason for a two-
2508 dnl stage process here is to correctly handle $srcdir!=$objdir without
2509 dnl having to write complex code (the sed commands to clean the macro
2510 dnl namespace are complex and fragile enough as it is). We must also
2511 dnl add a relative path so that -I- is supported properly.
2512 dnl
2513 dnl Substs:
2514 dnl glibcxx_thread_h
2515 dnl
2516 dnl Defines:
2517 dnl HAVE_GTHR_DEFAULT
2518 dnl
2519 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2520 AC_MSG_CHECKING([for thread model used by GCC])
2521 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2522 AC_MSG_RESULT([$target_thread_file])
2524 if test $target_thread_file != single; then
2525 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2526 [Define if gthr-default.h exists
2527 (meaning that threading support is enabled).])
2528 fi
2530 glibcxx_thread_h=gthr-$target_thread_file.h
2532 dnl Check for __GTHREADS define.
2533 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2534 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2535 enable_thread=yes
2536 else
2537 enable_thread=no
2538 fi
2540 AC_SUBST(glibcxx_thread_h)
2541 ])
2544 # Check whether LC_MESSAGES is available in <locale.h>.
2545 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2546 #
2547 # This file file be copied and used freely without restrictions. It can
2548 # be used in projects which are not available under the GNU Public License
2549 # but which still want to provide support for the GNU gettext functionality.
2550 # Please note that the actual code is *not* freely available.
2551 AC_DEFUN([AC_LC_MESSAGES], [
2552 AC_CHECK_HEADER(locale.h, [
2553 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2554 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2555 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2556 if test $ac_cv_val_LC_MESSAGES = yes; then
2557 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2558 [Define if LC_MESSAGES is available in <locale.h>.])
2559 fi
2560 ])
2561 ])
2563 # Macros from the top-level gcc directory.
2564 m4_include([../config/tls.m4])