| blob | e998471c446a29742787caf2e1c01639c263fa65 |
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 tmpf = cprojf(tmpf);
864 d = cabs(tmpd);
865 d = carg(tmpd);
866 tmpd = ccos(tmpd);
867 tmpd = ccosh(tmpd);
868 tmpd = cexp(tmpd);
869 tmpd = clog(tmpd);
870 tmpd = csin(tmpd);
871 tmpd = csinh(tmpd);
872 tmpd = csqrt(tmpd);
873 tmpd = ctan(tmpd);
874 tmpd = ctanh(tmpd);
875 tmpd = cpow(tmpd, tmpd);
876 tmpd = cproj(tmpd);
877 ld = cabsl(tmpld);
878 ld = cargl(tmpld);
879 tmpld = ccosl(tmpld);
880 tmpld = ccoshl(tmpld);
881 tmpld = cexpl(tmpld);
882 tmpld = clogl(tmpld);
883 tmpld = csinl(tmpld);
884 tmpld = csinhl(tmpld);
885 tmpld = csqrtl(tmpld);
886 tmpld = ctanl(tmpld);
887 tmpld = ctanhl(tmpld);
888 tmpld = cpowl(tmpld, tmpld);
889 tmpld = cprojl(tmpld);
890 ],[glibcxx_cv_c99_complex=yes], [glibcxx_cv_c99_complex=no])
891 fi
892 AC_MSG_RESULT($glibcxx_cv_c99_complex)
893 if test x"$glibcxx_cv_c99_complex" = x"yes"; then
894 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
895 [Define if C99 functions in <complex.h> should be used in
896 <complex>. Using compiler builtins for these functions requires
897 corresponding C99 library functions to be present.])
898 fi
900 # Check for the existence in <stdio.h> of vscanf, et. al.
901 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
902 AC_CACHE_VAL(glibcxx_cv_c99_stdio, [
903 GCC_TRY_COMPILE_OR_LINK(
904 [#include <stdio.h>
905 #include <stdarg.h>
906 void foo(char* fmt, ...)
907 {
908 va_list args; va_start(args, fmt);
909 vfscanf(stderr, "%i", args);
910 vscanf("%i", args);
911 vsnprintf(fmt, 0, "%i", args);
912 vsscanf(fmt, "%i", args);
913 }],
914 [snprintf("12", 0, "%i");],
915 [glibcxx_cv_c99_stdio=yes], [glibcxx_cv_c99_stdio=no])
916 ])
917 AC_MSG_RESULT($glibcxx_cv_c99_stdio)
919 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
920 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
921 AC_CACHE_VAL(glibcxx_cv_c99_stdlib, [
922 GCC_TRY_COMPILE_OR_LINK(
923 [#include <stdlib.h>
924 volatile float f;
925 volatile long double ld;
926 volatile unsigned long long ll;
927 lldiv_t mydivt;],
928 [char* tmp;
929 f = strtof("gnu", &tmp);
930 ld = strtold("gnu", &tmp);
931 ll = strtoll("gnu", &tmp, 10);
932 ll = strtoull("gnu", &tmp, 10);
933 ll = llabs(10);
934 mydivt = lldiv(10,1);
935 ll = mydivt.quot;
936 ll = mydivt.rem;
937 ll = atoll("10");
938 _Exit(0);
939 ],[glibcxx_cv_c99_stdlib=yes], [glibcxx_cv_c99_stdlib=no])
940 ])
941 AC_MSG_RESULT($glibcxx_cv_c99_stdlib)
943 # Check for the existence in <wchar.h> of wcstold, etc.
944 glibcxx_cv_c99_wchar=no;
945 if test x"$ac_has_wchar_h" = xyes &&
946 test x"$ac_has_wctype_h" = xyes; then
947 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
948 AC_TRY_COMPILE([#include <wchar.h>
949 namespace test
950 {
951 using ::wcstold;
952 using ::wcstoll;
953 using ::wcstoull;
954 }
955 ],[],[glibcxx_cv_c99_wchar=yes], [glibcxx_cv_c99_wchar=no])
957 # Checks for wide character functions that may not be present.
958 # Injection of these is wrapped with guard macros.
959 # NB: only put functions here, instead of immediately above, if
960 # absolutely necessary.
961 AC_TRY_COMPILE([#include <wchar.h>
962 namespace test { using ::vfwscanf; } ], [],
963 [AC_DEFINE(HAVE_VFWSCANF,1,
964 [Defined if vfwscanf exists.])],[])
966 AC_TRY_COMPILE([#include <wchar.h>
967 namespace test { using ::vswscanf; } ], [],
968 [AC_DEFINE(HAVE_VSWSCANF,1,
969 [Defined if vswscanf exists.])],[])
971 AC_TRY_COMPILE([#include <wchar.h>
972 namespace test { using ::vwscanf; } ], [],
973 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
975 AC_TRY_COMPILE([#include <wchar.h>
976 namespace test { using ::wcstof; } ], [],
977 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
979 AC_TRY_COMPILE([#include <wctype.h>],
980 [ wint_t t; int i = iswblank(t);],
981 [AC_DEFINE(HAVE_ISWBLANK,1,
982 [Defined if iswblank exists.])],[])
984 AC_MSG_RESULT($glibcxx_cv_c99_wchar)
985 fi
987 # Option parsed, now set things appropriately.
988 if test x"$glibcxx_cv_c99_math" = x"no" ||
989 test x"$glibcxx_cv_c99_complex" = x"no" ||
990 test x"$glibcxx_cv_c99_stdio" = x"no" ||
991 test x"$glibcxx_cv_c99_stdlib" = x"no" ||
992 test x"$glibcxx_cv_c99_wchar" = x"no"; then
993 enable_c99=no;
994 else
995 AC_DEFINE(_GLIBCXX_USE_C99, 1,
996 [Define if C99 functions or macros from <wchar.h>, <math.h>,
997 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
998 fi
1000 gcc_no_link="$ac_save_gcc_no_link"
1001 LIBS="$ac_save_LIBS"
1002 CXXFLAGS="$ac_save_CXXFLAGS"
1003 AC_LANG_RESTORE
1004 fi
1006 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1007 AC_MSG_RESULT($enable_c99)
1008 ])
1011 dnl
1012 dnl Check for IEEE Std 1003.1-2001 clock_gettime required for
1013 dnl 20.8.5 [time.clock] in the current C++0X working draft.
1014 dnl
1015 AC_DEFUN([GLIBCXX_CHECK_CLOCK_GETTIME], [
1017 AC_LANG_SAVE
1018 AC_LANG_CPLUSPLUS
1019 ac_save_CXXFLAGS="$CXXFLAGS"
1020 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1022 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1024 ac_has_clock_monotonic=no;
1025 ac_has_clock_realtime=no;
1026 if test x"$ac_has_unistd_h" = x"yes"; then
1027 AC_MSG_CHECKING([for monotonic clock])
1028 AC_TRY_LINK(
1029 [#include <unistd.h>
1030 #include <time.h>
1031 ],
1032 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1033 timespec tp;
1034 #endif
1035 clock_gettime(CLOCK_MONOTONIC, &tp);
1036 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1038 AC_MSG_RESULT($ac_has_clock_monotonic)
1040 AC_MSG_CHECKING([for realtime clock])
1041 AC_TRY_LINK(
1042 [#include <unistd.h>
1043 #include <time.h>
1044 ],
1045 [#if _POSIX_TIMERS > 0
1046 timespec tp;
1047 #endif
1048 clock_gettime(CLOCK_REALTIME, &tp);
1049 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
1051 AC_MSG_RESULT($ac_has_clock_realtime)
1052 fi
1054 if test x"$ac_has_clock_monotonic" = x"yes"; then
1055 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1056 [ Defined if clock_gettime has monotonic clock support. ])
1057 fi
1059 if test x"$ac_has_clock_realtime" = x"yes"; then
1060 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1061 [ Defined if clock_gettime has realtime clock support. ])
1062 fi
1064 CXXFLAGS="$ac_save_CXXFLAGS"
1065 AC_LANG_RESTORE
1066 ])
1068 dnl
1069 dnl Check for IEEE Std 1003.1-2001 gettimeofday required for
1070 dnl 20.8.5 [time.clock] in the current C++0X working draft.
1071 dnl
1072 AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
1074 AC_LANG_SAVE
1075 AC_LANG_CPLUSPLUS
1076 ac_save_CXXFLAGS="$CXXFLAGS"
1077 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1079 ac_has_gettimeofday=no;
1080 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1081 if test x"$ac_has_sys_time_h" = x"yes"; then
1082 AC_MSG_CHECKING([for gettimeofday])
1083 AC_TRY_LINK([#include <sys/time.h>],
1084 [timeval tv; gettimeofday(&tv, 0);],
1085 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
1087 AC_MSG_RESULT($ac_has_gettimeofday)
1088 fi
1090 if test x"$ac_has_gettimeofday" = x"yes"; then
1091 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1092 [ Defined if gettimeofday is available. ])
1093 fi
1095 CXXFLAGS="$ac_save_CXXFLAGS"
1096 AC_LANG_RESTORE
1097 ])
1099 dnl
1100 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1101 dnl facilities in Chapter 8, "C compatibility".
1102 dnl
1103 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1105 AC_LANG_SAVE
1106 AC_LANG_CPLUSPLUS
1108 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1109 # undefined and fake C99 facilities may be spuriously enabled.
1110 ac_save_CXXFLAGS="$CXXFLAGS"
1111 CXXFLAGS="$CXXFLAGS -std=c++98"
1113 # Check for the existence of <complex.h> complex math functions used
1114 # by tr1/complex.
1115 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1116 ac_c99_complex_tr1=no;
1117 if test x"$ac_has_complex_h" = x"yes"; then
1118 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1119 AC_TRY_COMPILE([#include <complex.h>],
1120 [typedef __complex__ float float_type; float_type tmpf;
1121 cacosf(tmpf);
1122 casinf(tmpf);
1123 catanf(tmpf);
1124 cacoshf(tmpf);
1125 casinhf(tmpf);
1126 catanhf(tmpf);
1127 typedef __complex__ double double_type; double_type tmpd;
1128 cacos(tmpd);
1129 casin(tmpd);
1130 catan(tmpd);
1131 cacosh(tmpd);
1132 casinh(tmpd);
1133 catanh(tmpd);
1134 typedef __complex__ long double ld_type; ld_type tmpld;
1135 cacosl(tmpld);
1136 casinl(tmpld);
1137 catanl(tmpld);
1138 cacoshl(tmpld);
1139 casinhl(tmpld);
1140 catanhl(tmpld);
1141 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1142 fi
1143 AC_MSG_RESULT($ac_c99_complex_tr1)
1144 if test x"$ac_c99_complex_tr1" = x"yes"; then
1145 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1146 [Define if C99 functions in <complex.h> should be used in
1147 <tr1/complex>. Using compiler builtins for these functions
1148 requires corresponding C99 library functions to be present.])
1149 fi
1151 # Check for the existence of <ctype.h> functions.
1152 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1153 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
1154 AC_TRY_COMPILE([#include <ctype.h>],
1155 [int ch;
1156 int ret;
1157 ret = isblank(ch);
1158 ],[glibcxx_cv_c99_ctype_tr1=yes], [glibcxx_cv_c99_ctype_tr1=no])
1159 ])
1160 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1161 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
1162 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1163 [Define if C99 functions in <ctype.h> should be imported in
1164 <tr1/cctype> in namespace std::tr1.])
1165 fi
1167 # Check for the existence of <fenv.h> functions.
1168 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1169 ac_c99_fenv_tr1=no;
1170 if test x"$ac_has_fenv_h" = x"yes"; then
1171 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1172 AC_TRY_COMPILE([#include <fenv.h>],
1173 [int except, mode;
1174 fexcept_t* pflag;
1175 fenv_t* penv;
1176 int ret;
1177 ret = feclearexcept(except);
1178 ret = fegetexceptflag(pflag, except);
1179 ret = feraiseexcept(except);
1180 ret = fesetexceptflag(pflag, except);
1181 ret = fetestexcept(except);
1182 ret = fegetround();
1183 ret = fesetround(mode);
1184 ret = fegetenv(penv);
1185 ret = feholdexcept(penv);
1186 ret = fesetenv(penv);
1187 ret = feupdateenv(penv);
1188 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1189 fi
1190 AC_MSG_RESULT($ac_c99_fenv_tr1)
1191 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1192 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1193 [Define if C99 functions in <fenv.h> should be imported in
1194 <tr1/cfenv> in namespace std::tr1.])
1195 fi
1197 # Check for the existence of <stdint.h> types.
1198 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1199 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
1200 AC_TRY_COMPILE([#include <stdint.h>],
1201 [typedef int8_t my_int8_t;
1202 typedef int16_t my_int16_t;
1203 typedef int32_t my_int32_t;
1204 typedef int64_t my_int64_t;
1205 typedef int_fast8_t my_int_fast8_t;
1206 typedef int_fast16_t my_int_fast16_t;
1207 typedef int_fast32_t my_int_fast32_t;
1208 typedef int_fast64_t my_int_fast64_t;
1209 typedef int_least8_t my_int_least8_t;
1210 typedef int_least16_t my_int_least16_t;
1211 typedef int_least32_t my_int_least32_t;
1212 typedef int_least64_t my_int_least64_t;
1213 typedef intmax_t my_intmax_t;
1214 typedef intptr_t my_intptr_t;
1215 typedef uint8_t my_uint8_t;
1216 typedef uint16_t my_uint16_t;
1217 typedef uint32_t my_uint32_t;
1218 typedef uint64_t my_uint64_t;
1219 typedef uint_fast8_t my_uint_fast8_t;
1220 typedef uint_fast16_t my_uint_fast16_t;
1221 typedef uint_fast32_t my_uint_fast32_t;
1222 typedef uint_fast64_t my_uint_fast64_t;
1223 typedef uint_least8_t my_uint_least8_t;
1224 typedef uint_least16_t my_uint_least16_t;
1225 typedef uint_least32_t my_uint_least32_t;
1226 typedef uint_least64_t my_uint_least64_t;
1227 typedef uintmax_t my_uintmax_t;
1228 typedef uintptr_t my_uintptr_t;
1229 ],[glibcxx_cv_c99_stdint_tr1=yes], [glibcxx_cv_c99_stdint_tr1=no])
1230 ])
1231 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1232 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1233 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1234 [Define if C99 types in <stdint.h> should be imported in
1235 <tr1/cstdint> in namespace std::tr1.])
1236 fi
1238 # Check for the existence of <math.h> functions.
1239 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1240 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
1241 AC_TRY_COMPILE([#include <math.h>],
1242 [typedef double_t my_double_t;
1243 typedef float_t my_float_t;
1244 acosh(0.0);
1245 acoshf(0.0f);
1246 acoshl(0.0l);
1247 asinh(0.0);
1248 asinhf(0.0f);
1249 asinhl(0.0l);
1250 atanh(0.0);
1251 atanhf(0.0f);
1252 atanhl(0.0l);
1253 cbrt(0.0);
1254 cbrtf(0.0f);
1255 cbrtl(0.0l);
1256 copysign(0.0, 0.0);
1257 copysignf(0.0f, 0.0f);
1258 copysignl(0.0l, 0.0l);
1259 erf(0.0);
1260 erff(0.0f);
1261 erfl(0.0l);
1262 erfc(0.0);
1263 erfcf(0.0f);
1264 erfcl(0.0l);
1265 exp2(0.0);
1266 exp2f(0.0f);
1267 exp2l(0.0l);
1268 expm1(0.0);
1269 expm1f(0.0f);
1270 expm1l(0.0l);
1271 fdim(0.0, 0.0);
1272 fdimf(0.0f, 0.0f);
1273 fdiml(0.0l, 0.0l);
1274 fma(0.0, 0.0, 0.0);
1275 fmaf(0.0f, 0.0f, 0.0f);
1276 fmal(0.0l, 0.0l, 0.0l);
1277 fmax(0.0, 0.0);
1278 fmaxf(0.0f, 0.0f);
1279 fmaxl(0.0l, 0.0l);
1280 fmin(0.0, 0.0);
1281 fminf(0.0f, 0.0f);
1282 fminl(0.0l, 0.0l);
1283 hypot(0.0, 0.0);
1284 hypotf(0.0f, 0.0f);
1285 hypotl(0.0l, 0.0l);
1286 ilogb(0.0);
1287 ilogbf(0.0f);
1288 ilogbl(0.0l);
1289 lgamma(0.0);
1290 lgammaf(0.0f);
1291 lgammal(0.0l);
1292 llrint(0.0);
1293 llrintf(0.0f);
1294 llrintl(0.0l);
1295 llround(0.0);
1296 llroundf(0.0f);
1297 llroundl(0.0l);
1298 log1p(0.0);
1299 log1pf(0.0f);
1300 log1pl(0.0l);
1301 log2(0.0);
1302 log2f(0.0f);
1303 log2l(0.0l);
1304 logb(0.0);
1305 logbf(0.0f);
1306 logbl(0.0l);
1307 lrint(0.0);
1308 lrintf(0.0f);
1309 lrintl(0.0l);
1310 lround(0.0);
1311 lroundf(0.0f);
1312 lroundl(0.0l);
1313 nan(0);
1314 nanf(0);
1315 nanl(0);
1316 nearbyint(0.0);
1317 nearbyintf(0.0f);
1318 nearbyintl(0.0l);
1319 nextafter(0.0, 0.0);
1320 nextafterf(0.0f, 0.0f);
1321 nextafterl(0.0l, 0.0l);
1322 nexttoward(0.0, 0.0);
1323 nexttowardf(0.0f, 0.0f);
1324 nexttowardl(0.0l, 0.0l);
1325 remainder(0.0, 0.0);
1326 remainderf(0.0f, 0.0f);
1327 remainderl(0.0l, 0.0l);
1328 remquo(0.0, 0.0, 0);
1329 remquo(0.0f, 0.0f, 0);
1330 remquo(0.0l, 0.0l, 0);
1331 rint(0.0);
1332 rintf(0.0f);
1333 rintl(0.0l);
1334 round(0.0);
1335 roundf(0.0f);
1336 roundl(0.0l);
1337 scalbln(0.0, 0l);
1338 scalblnf(0.0f, 0l);
1339 scalblnl(0.0l, 0l);
1340 scalbn(0.0, 0);
1341 scalbnf(0.0f, 0);
1342 scalbnl(0.0l, 0);
1343 tgamma(0.0);
1344 tgammaf(0.0f);
1345 tgammal(0.0l);
1346 trunc(0.0);
1347 truncf(0.0f);
1348 truncl(0.0l);
1349 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
1350 ])
1351 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1352 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
1353 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1354 [Define if C99 functions or macros in <math.h> should be imported
1355 in <tr1/cmath> in namespace std::tr1.])
1356 fi
1358 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1359 # sense if the previous check fails, per C99, 7.8/1).
1360 ac_c99_inttypes_tr1=no;
1361 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1362 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1363 AC_TRY_COMPILE([#include <inttypes.h>],
1364 [intmax_t i, numer, denom, base;
1365 const char* s;
1366 char** endptr;
1367 intmax_t ret = imaxabs(i);
1368 imaxdiv_t dret = imaxdiv(numer, denom);
1369 ret = strtoimax(s, endptr, base);
1370 uintmax_t uret = strtoumax(s, endptr, base);
1371 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1372 fi
1373 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1374 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1375 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1376 [Define if C99 functions in <inttypes.h> should be imported in
1377 <tr1/cinttypes> in namespace std::tr1.])
1378 fi
1380 # Check for the existence of the <stdbool.h> header.
1381 AC_CHECK_HEADERS(stdbool.h)
1383 CXXFLAGS="$ac_save_CXXFLAGS"
1384 AC_LANG_RESTORE
1385 ])
1387 dnl
1388 dnl Check whether "dev/random" and "dev/urandom" are available for the
1389 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1390 dnl
1391 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1393 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1394 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
1395 AC_TRY_RUN([#include <stdio.h>
1396 int main()
1397 {
1398 return !(fopen("/dev/random", "r")
1399 && fopen("/dev/urandom", "r"));
1400 }
1401 ],
1402 [glibcxx_cv_random_tr1=yes], [glibcxx_cv_random_tr1=no],
1403 [glibcxx_cv_random_tr1=no])
1404 ])
1405 AC_MSG_RESULT($glibcxx_cv_random_tr1)
1406 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
1407 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1408 [Define if dev/random and dev/urandom are available for
1409 the random_device of TR1 (Chapter 5.1).])
1410 fi
1412 ])
1414 dnl
1415 dnl Check whether macros, etc are present for <system_error>
1416 dnl
1417 AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
1419 m4_pushdef([n_syserr], [1])dnl
1420 m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
1421 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
1422 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY],
1423 [m4_pushdef([SYSERR], m4_toupper(syserr))dnl
1424 AC_MSG_CHECKING([for syserr])
1425 AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
1426 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
1427 [int i = syserr;])],
1428 [glibcxx_cv_system_error[]n_syserr=yes],
1429 [glibcxx_cv_system_error[]n_syserr=no])
1430 ])
1431 AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
1432 if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
1433 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
1434 fi
1435 m4_define([n_syserr], m4_incr(n_syserr))dnl
1436 m4_popdef([SYSERR])dnl
1437 ])
1438 m4_popdef([n_syserr])dnl
1439 ])
1441 dnl
1442 dnl Check whether C++200x's standard layout types are supported.
1443 dnl
1444 AC_DEFUN([GLIBCXX_CHECK_STANDARD_LAYOUT], [
1446 AC_MSG_CHECKING([for ISO C++200x standard layout type support])
1447 AC_CACHE_VAL(ac_standard_layout, [
1448 AC_LANG_SAVE
1449 AC_LANG_CPLUSPLUS
1450 ac_test_CXXFLAGS="${CXXFLAGS+set}"
1451 ac_save_CXXFLAGS="$CXXFLAGS"
1452 CXXFLAGS='-std=gnu++0x'
1454 AC_TRY_COMPILE([struct b
1455 {
1456 bool t;
1458 // Need standard layout relaxation from POD
1459 private:
1460 b& operator=(const b&);
1461 b(const b&);
1462 };
1464 int main()
1465 {
1466 b tst1 = { false };
1467 return 0;
1468 }],,
1469 [ac_standard_layout=yes], [ac_standard_layout=no])
1471 CXXFLAGS="$ac_save_CXXFLAGS"
1472 AC_LANG_RESTORE
1473 ])
1474 AC_MSG_RESULT($ac_standard_layout)
1475 if test x"$ac_standard_layout" = x"yes"; then
1476 AC_DEFINE(_GLIBCXX_USE_STANDARD_LAYOUT, 1,
1477 [Define if standard layout types are supported in C++200x.])
1478 fi
1479 ])
1481 dnl
1482 dnl Check for what type of C headers to use.
1483 dnl
1484 dnl --enable-cheaders= [does stuff].
1485 dnl --disable-cheaders [does not do anything, really].
1486 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1487 dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
1488 dnl
1489 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1490 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1491 [construct "C" headers for g++], [permit c|c_std|c_global])
1492 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1494 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1496 # Allow overrides to configure.host here.
1497 if test $enable_cheaders = c_global; then
1498 c_compatibility=yes
1499 fi
1501 if test $enable_cheaders = c_global || test $enable_cheaders = c_std; then
1502 c_extra=yes
1503 fi
1505 AC_SUBST(C_INCLUDE_DIR)
1506 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1507 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1508 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
1509 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1510 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_EXTRA, test $c_extra = yes)
1511 ])
1514 dnl
1515 dnl Check for which locale library to use. The choice is mapped to
1516 dnl a subdirectory of config/locale.
1517 dnl
1518 dnl Default is generic.
1519 dnl
1520 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1521 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1522 [use MODEL for target locale package],
1523 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1525 # Deal with gettext issues. Default to not using it (=no) until we detect
1526 # support for it later. Let the user turn it off via --e/d, but let that
1527 # default to on for easier handling.
1528 USE_NLS=no
1529 AC_ARG_ENABLE(nls,
1530 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1531 [],
1532 [enable_nls=yes])
1534 # Either a known packaage, or "auto"
1535 if test $enable_clocale = no || test $enable_clocale = yes; then
1536 enable_clocale=auto
1537 fi
1538 enable_clocale_flag=$enable_clocale
1540 # Probe for locale model to use if none specified.
1541 # Default to "generic".
1542 if test $enable_clocale_flag = auto; then
1543 case ${target_os} in
1544 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1545 enable_clocale_flag=gnu
1546 ;;
1547 darwin* | freebsd*)
1548 enable_clocale_flag=darwin
1549 ;;
1550 *)
1551 enable_clocale_flag=generic
1552 ;;
1553 esac
1554 fi
1556 # Sanity check model, and test for special functionality.
1557 if test $enable_clocale_flag = gnu; then
1558 AC_EGREP_CPP([_GLIBCXX_ok], [
1559 #include <features.h>
1560 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1561 _GLIBCXX_ok
1562 #endif
1563 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1565 if test $enable_clocale = auto; then
1566 # Test for bugs early in glibc-2.2.x series
1567 AC_TRY_RUN([
1568 #define _GNU_SOURCE 1
1569 #include <locale.h>
1570 #include <string.h>
1571 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1572 extern __typeof(newlocale) __newlocale;
1573 extern __typeof(duplocale) __duplocale;
1574 extern __typeof(strcoll_l) __strcoll_l;
1575 #endif
1576 int main()
1577 {
1578 const char __one[] = "Äuglein Augmen";
1579 const char __two[] = "Äuglein";
1580 int i;
1581 int j;
1582 __locale_t loc;
1583 __locale_t loc_dup;
1584 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1585 loc_dup = __duplocale(loc);
1586 i = __strcoll_l(__one, __two, loc);
1587 j = __strcoll_l(__one, __two, loc_dup);
1588 return 0;
1589 }
1590 ],
1591 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1592 [enable_clocale_flag=generic])
1593 fi
1595 # Set it to scream when it hurts.
1596 ac_save_CFLAGS="$CFLAGS"
1597 CFLAGS="-Wimplicit-function-declaration -Werror"
1599 # Use strxfrm_l if available.
1600 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1601 #include <string.h>
1602 #include <locale.h>],
1603 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1604 AC_DEFINE(HAVE_STRXFRM_L, 1,
1605 [Define if strxfrm_l is available in <string.h>.]),)
1607 # Use strerror_l if available.
1608 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1609 #include <string.h>
1610 #include <locale.h>],
1611 [__locale_t loc; strerror_l(5, loc);],
1612 AC_DEFINE(HAVE_STRERROR_L, 1,
1613 [Define if strerror_l is available in <string.h>.]),)
1615 CFLAGS="$ac_save_CFLAGS"
1616 fi
1618 # Perhaps use strerror_r if available, and strerror_l isn't.
1619 ac_save_CFLAGS="$CFLAGS"
1620 CFLAGS="-Wimplicit-function-declaration -Werror"
1621 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1622 #include <string.h>
1623 #include <locale.h>],
1624 [char s[128]; strerror_r(5, s, 128);],
1625 AC_DEFINE(HAVE_STRERROR_R, 1,
1626 [Define if strerror_r is available in <string.h>.]),)
1627 CFLAGS="$ac_save_CFLAGS"
1629 # Set configure bits for specified locale package
1630 AC_MSG_CHECKING([for C locale to use])
1631 case ${enable_clocale_flag} in
1632 generic)
1633 AC_MSG_RESULT(generic)
1635 CLOCALE_H=config/locale/generic/c_locale.h
1636 CLOCALE_CC=config/locale/generic/c_locale.cc
1637 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1638 CCOLLATE_CC=config/locale/generic/collate_members.cc
1639 CCTYPE_CC=config/locale/generic/ctype_members.cc
1640 CMESSAGES_H=config/locale/generic/messages_members.h
1641 CMESSAGES_CC=config/locale/generic/messages_members.cc
1642 CMONEY_CC=config/locale/generic/monetary_members.cc
1643 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1644 CTIME_H=config/locale/generic/time_members.h
1645 CTIME_CC=config/locale/generic/time_members.cc
1646 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1647 ;;
1648 darwin)
1649 AC_MSG_RESULT(darwin or freebsd)
1651 CLOCALE_H=config/locale/generic/c_locale.h
1652 CLOCALE_CC=config/locale/generic/c_locale.cc
1653 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1654 CCOLLATE_CC=config/locale/generic/collate_members.cc
1655 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1656 CMESSAGES_H=config/locale/generic/messages_members.h
1657 CMESSAGES_CC=config/locale/generic/messages_members.cc
1658 CMONEY_CC=config/locale/generic/monetary_members.cc
1659 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1660 CTIME_H=config/locale/generic/time_members.h
1661 CTIME_CC=config/locale/generic/time_members.cc
1662 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1663 ;;
1665 gnu)
1666 AC_MSG_RESULT(gnu)
1668 # Declare intention to use gettext, and add support for specific
1669 # languages.
1670 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1671 ALL_LINGUAS="de fr"
1673 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1674 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1675 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1676 USE_NLS=yes
1677 fi
1678 # Export the build objects.
1679 for ling in $ALL_LINGUAS; do \
1680 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1681 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1682 done
1683 AC_SUBST(glibcxx_MOFILES)
1684 AC_SUBST(glibcxx_POFILES)
1686 CLOCALE_H=config/locale/gnu/c_locale.h
1687 CLOCALE_CC=config/locale/gnu/c_locale.cc
1688 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1689 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1690 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1691 CMESSAGES_H=config/locale/gnu/messages_members.h
1692 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1693 CMONEY_CC=config/locale/gnu/monetary_members.cc
1694 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1695 CTIME_H=config/locale/gnu/time_members.h
1696 CTIME_CC=config/locale/gnu/time_members.cc
1697 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1698 ;;
1699 ieee_1003.1-2001)
1700 AC_MSG_RESULT(IEEE 1003.1)
1702 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1703 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1704 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1705 CCOLLATE_CC=config/locale/generic/collate_members.cc
1706 CCTYPE_CC=config/locale/generic/ctype_members.cc
1707 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1708 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1709 CMONEY_CC=config/locale/generic/monetary_members.cc
1710 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1711 CTIME_H=config/locale/generic/time_members.h
1712 CTIME_CC=config/locale/generic/time_members.cc
1713 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1714 ;;
1715 esac
1717 # This is where the testsuite looks for locale catalogs, using the
1718 # -DLOCALEDIR define during testsuite compilation.
1719 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1720 AC_SUBST(glibcxx_localedir)
1722 # A standalone libintl (e.g., GNU libintl) may be in use.
1723 if test $USE_NLS = yes; then
1724 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1725 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1726 fi
1727 if test $USE_NLS = yes; then
1728 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1729 [Define if NLS translations are to be used.])
1730 fi
1732 AC_SUBST(USE_NLS)
1733 AC_SUBST(CLOCALE_H)
1734 AC_SUBST(CMESSAGES_H)
1735 AC_SUBST(CCODECVT_CC)
1736 AC_SUBST(CCOLLATE_CC)
1737 AC_SUBST(CCTYPE_CC)
1738 AC_SUBST(CMESSAGES_CC)
1739 AC_SUBST(CMONEY_CC)
1740 AC_SUBST(CNUMERIC_CC)
1741 AC_SUBST(CTIME_H)
1742 AC_SUBST(CTIME_CC)
1743 AC_SUBST(CLOCALE_CC)
1744 AC_SUBST(CLOCALE_INTERNAL_H)
1745 ])
1748 dnl
1749 dnl Check for which std::allocator base class to use. The choice is
1750 dnl mapped from a subdirectory of include/ext.
1751 dnl
1752 dnl Default is new.
1753 dnl
1754 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1755 AC_MSG_CHECKING([for std::allocator base class])
1756 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1757 [use KIND for target std::allocator base],
1758 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1760 # If they didn't use this option switch, or if they specified --enable
1761 # with no specific model, we'll have to look for one. If they
1762 # specified --disable (???), do likewise.
1763 if test $enable_libstdcxx_allocator = no ||
1764 test $enable_libstdcxx_allocator = yes;
1765 then
1766 enable_libstdcxx_allocator=auto
1767 fi
1769 # Either a known package, or "auto". Auto implies the default choice
1770 # for a particular platform.
1771 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1773 # Probe for host-specific support if no specific model is specified.
1774 # Default to "new".
1775 if test $enable_libstdcxx_allocator_flag = auto; then
1776 case ${target_os} in
1777 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1778 enable_libstdcxx_allocator_flag=new
1779 ;;
1780 *)
1781 enable_libstdcxx_allocator_flag=new
1782 ;;
1783 esac
1784 fi
1785 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1788 # Set configure bits for specified locale package
1789 case ${enable_libstdcxx_allocator_flag} in
1790 bitmap)
1791 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1792 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1793 ;;
1794 malloc)
1795 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1796 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1797 ;;
1798 mt)
1799 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1800 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1801 ;;
1802 new)
1803 ALLOCATOR_H=config/allocator/new_allocator_base.h
1804 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1805 ;;
1806 pool)
1807 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1808 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1809 ;;
1810 esac
1812 AC_SUBST(ALLOCATOR_H)
1813 AC_SUBST(ALLOCATOR_NAME)
1814 ])
1817 dnl
1818 dnl Check for whether the Boost-derived checks should be turned on.
1819 dnl
1820 dnl --enable-concept-checks turns them on.
1821 dnl --disable-concept-checks leaves them off.
1822 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1823 dnl Where DEFAULT is either `yes' or `no'.
1824 dnl
1825 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1826 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1827 if test $enable_concept_checks = yes; then
1828 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1829 [Define to use concept checking code from the boost libraries.])
1830 fi
1831 ])
1833 dnl
1834 dnl Check for parallel mode pre-requisites, including OpenMP support.
1835 dnl
1836 dnl + Usage: GLIBCXX_ENABLE_PARALLEL
1837 dnl
1838 AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
1840 enable_parallel=no;
1842 # See if configured libgomp/omp.h exists. (libgomp may be in
1843 # noconfigdirs but not explicitly disabled.)
1844 if test -f $glibcxx_builddir/../libgomp/omp.h; then
1845 enable_parallel=yes;
1846 else
1847 AC_MSG_NOTICE([$glibcxx_builddir/../libgomp/omp.h not found])
1848 fi
1850 AC_MSG_CHECKING([for parallel mode support])
1851 AC_MSG_RESULT([$enable_parallel])
1852 GLIBCXX_CONDITIONAL(ENABLE_PARALLEL, test $enable_parallel = yes)
1853 ])
1856 dnl
1857 dnl Check for which I/O library to use: stdio, or something specific.
1858 dnl
1859 dnl Default is stdio.
1860 dnl
1861 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1862 AC_MSG_CHECKING([for underlying I/O to use])
1863 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1864 [use target-specific I/O package], [permit stdio])
1866 # Now that libio has been removed, you can have any color you want as long
1867 # as it's black. This is one big no-op until other packages are added, but
1868 # showing the framework never hurts.
1869 case ${enable_cstdio} in
1870 stdio)
1871 CSTDIO_H=config/io/c_io_stdio.h
1872 BASIC_FILE_H=config/io/basic_file_stdio.h
1873 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1874 AC_MSG_RESULT(stdio)
1875 ;;
1876 esac
1878 AC_SUBST(CSTDIO_H)
1879 AC_SUBST(BASIC_FILE_H)
1880 AC_SUBST(BASIC_FILE_CC)
1881 ])
1884 dnl
1885 dnl Check for "unusual" flags to pass to the compiler while building.
1886 dnl
1887 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1888 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1889 dnl --disable-cxx-flags passes nothing.
1890 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1891 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1892 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1893 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1894 dnl If "default flags" is an empty string, the effect is the same
1895 dnl as --disable or --enable=no.
1896 dnl
1897 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1898 AC_MSG_CHECKING([for extra compiler flags for building])
1899 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1900 [pass compiler FLAGS when building library],
1901 [case "x$enable_cxx_flags" in
1902 xno | x) enable_cxx_flags= ;;
1903 x-*) ;;
1904 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1905 esac])
1907 # Run through flags (either default or command-line) and set anything
1908 # extra (e.g., #defines) that must accompany particular g++ options.
1909 if test -n "$enable_cxx_flags"; then
1910 for f in $enable_cxx_flags; do
1911 case "$f" in
1912 -fhonor-std) ;;
1913 -*) ;;
1914 *) # and we're trying to pass /what/ exactly?
1915 AC_MSG_ERROR([compiler flags start with a -]) ;;
1916 esac
1917 done
1918 fi
1920 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1921 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1922 AC_SUBST(EXTRA_CXX_FLAGS)
1923 ])
1926 dnl
1927 dnl Check to see if debugging libraries are to be built.
1928 dnl
1929 dnl --enable-libstdcxx-debug
1930 dnl builds a separate set of debugging libraries in addition to the
1931 dnl normal (shared, static) libstdc++ binaries.
1932 dnl
1933 dnl --disable-libstdcxx-debug
1934 dnl builds only one (non-debug) version of libstdc++.
1935 dnl
1936 dnl --enable-libstdcxx-debug-flags=FLAGS
1937 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1938 dnl
1939 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1940 dnl Where DEFAULT is either `yes' or `no'.
1941 dnl
1942 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1943 AC_MSG_CHECKING([for additional debug build])
1944 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1945 AC_MSG_RESULT($enable_libstdcxx_debug)
1946 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1947 ])
1950 dnl
1951 dnl Check for explicit debug flags.
1952 dnl
1953 dnl --enable-libstdcxx-debug-flags='-O1'
1954 dnl is a general method for passing flags to be used when
1955 dnl building debug libraries with --enable-debug.
1956 dnl
1957 dnl --disable-libstdcxx-debug-flags does nothing.
1958 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1959 dnl If "default flags" is an empty string, the effect is the same
1960 dnl as --disable or --enable=no.
1961 dnl
1962 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1963 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1964 [pass compiler FLAGS when building debug library],
1965 [case "x$enable_libstdcxx_debug_flags" in
1966 xno | x) enable_libstdcxx_debug_flags= ;;
1967 x-*) ;;
1968 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1969 esac])
1971 # Option parsed, now set things appropriately
1972 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1973 AC_SUBST(DEBUG_FLAGS)
1975 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1976 ])
1979 dnl
1980 dnl Check if the user only wants a freestanding library implementation.
1981 dnl
1982 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1983 dnl installing only the headers required by [17.4.1.3] and the language
1984 dnl support library. More than that will be built (to keep the Makefiles
1985 dnl conveniently clean), but not installed.
1986 dnl
1987 dnl Sets:
1988 dnl is_hosted (yes/no)
1989 dnl
1990 dnl Defines:
1991 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1992 dnl
1993 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1994 AC_ARG_ENABLE([hosted-libstdcxx],
1995 AC_HELP_STRING([--disable-hosted-libstdcxx],
1996 [only build freestanding C++ runtime support]),,
1997 [case "$host" in
1998 arm*-*-symbianelf*)
1999 enable_hosted_libstdcxx=no
2000 ;;
2001 *)
2002 enable_hosted_libstdcxx=yes
2003 ;;
2004 esac])
2005 if test "$enable_hosted_libstdcxx" = no; then
2006 AC_MSG_NOTICE([Only freestanding libraries will be built])
2007 is_hosted=no
2008 hosted_define=0
2009 enable_abi_check=no
2010 enable_libstdcxx_pch=no
2011 else
2012 is_hosted=yes
2013 hosted_define=1
2014 fi
2015 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
2016 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2017 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
2018 ])
2021 dnl
2022 dnl Check for template specializations for the 'long long' type.
2023 dnl The result determines only whether 'long long' I/O is enabled; things
2024 dnl like numeric_limits<> specializations are always available.
2025 dnl
2026 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2027 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2028 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
2029 dnl Where DEFAULT is either `yes' or `no'.
2030 dnl
2031 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
2032 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
2033 if test $enable_long_long = yes; then
2034 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2035 [Define if code specialized for long long should be used.])
2036 fi
2037 AC_MSG_CHECKING([for enabled long long specializations])
2038 AC_MSG_RESULT([$enable_long_long])
2039 ])
2042 dnl
2043 dnl Check for template specializations for the 'wchar_t' type.
2044 dnl
2045 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
2046 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
2047 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
2048 dnl Where DEFAULT is either `yes' or `no'.
2049 dnl
2050 dnl Necessary support must also be present.
2051 dnl
2052 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
2053 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
2055 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
2056 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
2057 AC_MSG_CHECKING([for mbstate_t])
2058 AC_TRY_COMPILE([#include <wchar.h>],
2059 [mbstate_t teststate;],
2060 have_mbstate_t=yes, have_mbstate_t=no)
2061 AC_MSG_RESULT($have_mbstate_t)
2062 if test x"$have_mbstate_t" = xyes; then
2063 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
2064 fi
2066 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
2067 # ac_has_wchar_h.
2068 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
2070 if test x"$enable_wchar_t" = x"yes"; then
2072 AC_LANG_SAVE
2073 AC_LANG_CPLUSPLUS
2075 if test x"$ac_has_wchar_h" = xyes &&
2076 test x"$ac_has_wctype_h" = xyes; then
2077 AC_TRY_COMPILE([#include <wchar.h>
2078 #include <stddef.h>
2079 wint_t i;
2080 long l = WEOF;
2081 long j = WCHAR_MIN;
2082 long k = WCHAR_MAX;
2083 namespace test
2084 {
2085 using ::btowc;
2086 using ::fgetwc;
2087 using ::fgetws;
2088 using ::fputwc;
2089 using ::fputws;
2090 using ::fwide;
2091 using ::fwprintf;
2092 using ::fwscanf;
2093 using ::getwc;
2094 using ::getwchar;
2095 using ::mbrlen;
2096 using ::mbrtowc;
2097 using ::mbsinit;
2098 using ::mbsrtowcs;
2099 using ::putwc;
2100 using ::putwchar;
2101 using ::swprintf;
2102 using ::swscanf;
2103 using ::ungetwc;
2104 using ::vfwprintf;
2105 using ::vswprintf;
2106 using ::vwprintf;
2107 using ::wcrtomb;
2108 using ::wcscat;
2109 using ::wcschr;
2110 using ::wcscmp;
2111 using ::wcscoll;
2112 using ::wcscpy;
2113 using ::wcscspn;
2114 using ::wcsftime;
2115 using ::wcslen;
2116 using ::wcsncat;
2117 using ::wcsncmp;
2118 using ::wcsncpy;
2119 using ::wcspbrk;
2120 using ::wcsrchr;
2121 using ::wcsrtombs;
2122 using ::wcsspn;
2123 using ::wcsstr;
2124 using ::wcstod;
2125 using ::wcstok;
2126 using ::wcstol;
2127 using ::wcstoul;
2128 using ::wcsxfrm;
2129 using ::wctob;
2130 using ::wmemchr;
2131 using ::wmemcmp;
2132 using ::wmemcpy;
2133 using ::wmemmove;
2134 using ::wmemset;
2135 using ::wprintf;
2136 using ::wscanf;
2137 }
2138 ],[],[], [enable_wchar_t=no])
2139 else
2140 enable_wchar_t=no
2141 fi
2143 AC_LANG_RESTORE
2144 fi
2146 if test x"$enable_wchar_t" = x"yes"; then
2147 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
2148 [Define if code specialized for wchar_t should be used.])
2149 fi
2151 AC_MSG_CHECKING([for enabled wchar_t specializations])
2152 AC_MSG_RESULT([$enable_wchar_t])
2153 ])
2156 dnl
2157 dnl Check to see if building and using a C++ precompiled header can be done.
2158 dnl
2159 dnl --enable-libstdcxx-pch=yes
2160 dnl default, this shows intent to use stdc++.h.gch If it looks like it
2161 dnl may work, after some light-hearted attempts to puzzle out compiler
2162 dnl support, flip bits on in include/Makefile.am
2163 dnl
2164 dnl --disable-libstdcxx-pch
2165 dnl turns off attempts to use or build stdc++.h.gch.
2166 dnl
2167 dnl Substs:
2168 dnl glibcxx_PCHFLAGS
2169 dnl
2170 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
2171 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
2172 if test $enable_libstdcxx_pch = yes; then
2173 AC_CACHE_CHECK([for compiler with PCH support],
2174 [glibcxx_cv_prog_CXX_pch],
2175 [ac_save_CXXFLAGS="$CXXFLAGS"
2176 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
2177 AC_LANG_SAVE
2178 AC_LANG_CPLUSPLUS
2179 echo '#include <math.h>' > conftest.h
2180 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
2181 -o conftest.h.gch 1>&5 2>&1 &&
2182 echo '#error "pch failed"' > conftest.h &&
2183 echo '#include "conftest.h"' > conftest.cc &&
2184 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
2185 then
2186 glibcxx_cv_prog_CXX_pch=yes
2187 else
2188 glibcxx_cv_prog_CXX_pch=no
2189 fi
2190 rm -f conftest*
2191 CXXFLAGS=$ac_save_CXXFLAGS
2192 AC_LANG_RESTORE
2193 ])
2194 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
2195 fi
2197 AC_MSG_CHECKING([for enabled PCH])
2198 AC_MSG_RESULT([$enable_libstdcxx_pch])
2200 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
2201 if test $enable_libstdcxx_pch = yes; then
2202 glibcxx_PCHFLAGS="-include bits/stdc++.h"
2203 else
2204 glibcxx_PCHFLAGS=""
2205 fi
2206 AC_SUBST(glibcxx_PCHFLAGS)
2207 ])
2210 dnl
2211 dnl Check for atomic builtins.
2212 dnl See:
2213 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2214 dnl
2215 dnl This checks to see if the host supports the compiler-generated
2216 dnl builtins for atomic operations for various integral sizes. Note, this
2217 dnl is intended to be an all-or-nothing switch, so all the atomic operations
2218 dnl that are used should be checked.
2219 dnl
2220 dnl Note:
2221 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2222 dnl see: CHECK_SYNC_FETCH_AND_ADD
2223 dnl
2224 dnl Defines:
2225 dnl _GLIBCXX_ATOMIC_BUILTINS_1
2226 dnl _GLIBCXX_ATOMIC_BUILTINS_4
2227 dnl
2228 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2229 AC_LANG_SAVE
2230 AC_LANG_CPLUSPLUS
2231 old_CXXFLAGS="$CXXFLAGS"
2233 # Compile unoptimized.
2234 CXXFLAGS='-O0 -S'
2236 # Fake what AC_TRY_COMPILE does, without linking as this is
2237 # unnecessary for a builtins test.
2239 cat > conftest.$ac_ext << EOF
2240 [#]line __oline__ "configure"
2241 int main()
2242 {
2243 // NB: _Atomic_word not necessarily int.
2244 typedef int atomic_type;
2245 atomic_type c1;
2246 atomic_type c2;
2247 const atomic_type c3(0);
2248 __sync_fetch_and_add(&c1, c2);
2249 __sync_val_compare_and_swap(&c1, c3, c2);
2250 __sync_lock_test_and_set(&c1, c3);
2251 __sync_lock_release(&c1);
2252 __sync_synchronize();
2253 return 0;
2254 }
2255 EOF
2257 AC_MSG_CHECKING([for atomic builtins for int])
2258 if AC_TRY_EVAL(ac_compile); then
2259 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2260 enable_atomic_builtinsi=no
2261 else
2262 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
2263 [Define if builtin atomic operations for int are supported on this host.])
2264 enable_atomic_builtinsi=yes
2265 fi
2266 fi
2267 AC_MSG_RESULT($enable_atomic_builtinsi)
2268 rm -f conftest*
2270 cat > conftest.$ac_ext << EOF
2271 [#]line __oline__ "configure"
2272 int main()
2273 {
2274 typedef bool atomic_type;
2275 atomic_type c1;
2276 atomic_type c2;
2277 const atomic_type c3(0);
2278 __sync_fetch_and_add(&c1, c2);
2279 __sync_val_compare_and_swap(&c1, c3, c2);
2280 __sync_lock_test_and_set(&c1, c3);
2281 __sync_lock_release(&c1);
2282 __sync_synchronize();
2283 return 0;
2284 }
2285 EOF
2287 AC_MSG_CHECKING([for atomic builtins for bool])
2288 if AC_TRY_EVAL(ac_compile); then
2289 if grep __sync_ conftest.s >/dev/null 2>&1 ; then
2290 enable_atomic_builtinsb=no
2291 else
2292 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
2293 [Define if builtin atomic operations for bool are supported on this host.])
2294 enable_atomic_builtinsb=yes
2295 fi
2296 fi
2297 AC_MSG_RESULT($enable_atomic_builtinsb)
2298 rm -f conftest*
2300 CXXFLAGS="$old_CXXFLAGS"
2301 AC_LANG_RESTORE
2303 # Set atomicity_dir to builtins if either of above tests pass.
2304 if test $enable_atomic_builtinsi = yes || test $enable_atomic_builtinsb = yes ; then
2305 atomicity_dir=cpu/generic/atomicity_builtins
2306 fi
2308 # If still generic, set to mutex.
2309 if test $atomicity_dir = "cpu/generic" ; then
2310 atomicity_dir=cpu/generic/atomicity_mutex
2311 AC_MSG_WARN([No native atomic operations are provided for this platform.])
2312 if test $target_thread_file = single; then
2313 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
2314 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
2315 else
2316 AC_MSG_WARN([They will be faked using a mutex.])
2317 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
2318 fi
2319 fi
2321 ])
2324 dnl
2325 dnl Check for exception handling support. If an explicit enable/disable
2326 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2327 dnl target may or may not support call frame exceptions.
2328 dnl
2329 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2330 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2331 dnl Neither one forces an attempt at detection.
2332 dnl
2333 dnl Defines:
2334 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2335 dnl
2336 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2337 AC_MSG_CHECKING([for exception model to use])
2338 AC_LANG_SAVE
2339 AC_LANG_CPLUSPLUS
2340 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2341 [force use of builtin_setjmp for exceptions],
2342 [permit yes|no|auto])
2344 if test $enable_sjlj_exceptions = auto; then
2345 # Botheration. Now we've got to detect the exception model. Link tests
2346 # against libgcc.a are problematic since we've not been given proper -L
2347 # bits for single-tree newlib and libgloss.
2348 #
2349 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2350 cat > conftest.$ac_ext << EOF
2351 [#]line __oline__ "configure"
2352 struct S { ~S(); };
2353 void bar();
2354 void foo()
2355 {
2356 S s;
2357 bar();
2358 }
2359 EOF
2360 old_CXXFLAGS="$CXXFLAGS"
2361 CXXFLAGS=-S
2362 if AC_TRY_EVAL(ac_compile); then
2363 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2364 enable_sjlj_exceptions=yes
2365 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2366 enable_sjlj_exceptions=no
2367 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2368 enable_sjlj_exceptions=no
2369 fi
2370 fi
2371 CXXFLAGS="$old_CXXFLAGS"
2372 rm -f conftest*
2373 fi
2375 # This is a tad weird, for hysterical raisins. We have to map
2376 # enable/disable to two different models.
2377 case $enable_sjlj_exceptions in
2378 yes)
2379 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2380 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2381 ac_exception_model_name=sjlj
2382 ;;
2383 no)
2384 ac_exception_model_name="call frame"
2385 ;;
2386 *)
2387 AC_MSG_ERROR([unable to detect exception model])
2388 ;;
2389 esac
2390 AC_LANG_RESTORE
2391 AC_MSG_RESULT($ac_exception_model_name)
2392 ])
2395 dnl
2396 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2397 dnl
2398 dnl --enable-visibility enables attempt to use visibility attributes.
2399 dnl --disable-visibility turns off all use of visibility attributes.
2400 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2401 dnl Where DEFAULT is 'yes'.
2402 dnl
2403 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2404 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2406 if test x$enable_visibility = xyes ; then
2407 dnl all hail libgfortran
2408 dnl Check whether the target supports hidden visibility.
2409 AC_CACHE_CHECK([whether the target supports hidden visibility],
2410 glibcxx_cv_have_attribute_visibility, [
2411 save_CFLAGS="$CFLAGS"
2412 CFLAGS="$CFLAGS -Werror"
2413 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2414 [], glibcxx_cv_have_attribute_visibility=yes,
2415 glibcxx_cv_have_attribute_visibility=no)
2416 CFLAGS="$save_CFLAGS"])
2417 if test $glibcxx_cv_have_attribute_visibility = no; then
2418 enable_visibility=no
2419 fi
2420 fi
2422 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2423 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2424 ])
2427 dnl
2428 dnl Add version tags to symbols in shared library (or not), additionally
2429 dnl marking other symbols as private/local (or not).
2430 dnl
2431 dnl --enable-symvers=style adds a version script to the linker call when
2432 dnl creating the shared library. The choice of version script is
2433 dnl controlled by 'style'.
2434 dnl --disable-symvers does not.
2435 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2436 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2437 dnl choose a default style based on linker characteristics. Passing
2438 dnl 'no' disables versioning.
2439 dnl
2440 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2442 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2443 [enables symbol versioning of the shared library],
2444 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2446 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2447 # don't know enough about $LD to do tricks...
2448 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2450 # Turn a 'yes' into a suitable default.
2451 if test x$enable_symvers = xyes ; then
2452 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2453 enable_symvers=no
2454 else
2455 if test $with_gnu_ld = yes ; then
2456 enable_symvers=gnu
2457 else
2458 case ${target_os} in
2459 darwin*)
2460 enable_symvers=darwin ;;
2461 *)
2462 enable_symvers=no ;;
2463 esac
2464 fi
2465 fi
2466 fi
2468 # Check to see if 'darwin' or 'darwin-export' can win.
2469 if test x$enable_symvers = xdarwin-export ; then
2470 enable_symvers=darwin
2471 fi
2473 # Check to see if 'gnu' can win.
2474 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2475 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2476 AC_MSG_CHECKING([for shared libgcc])
2477 ac_save_CFLAGS="$CFLAGS"
2478 CFLAGS=' -lgcc_s'
2479 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2480 CFLAGS="$ac_save_CFLAGS"
2481 if test $glibcxx_shared_libgcc = no; then
2482 cat > conftest.c <<EOF
2483 int main (void) { return 0; }
2484 EOF
2485 changequote(,)dnl
2486 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2487 -shared -shared-libgcc -o conftest.so \
2488 conftest.c -v 2>&1 >/dev/null \
2489 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2490 changequote([,])dnl
2491 rm -f conftest.c conftest.so
2492 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2493 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2494 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2495 CFLAGS="$ac_save_CFLAGS"
2496 fi
2497 fi
2498 AC_MSG_RESULT($glibcxx_shared_libgcc)
2500 # For GNU ld, we need at least this version. The format is described in
2501 # GLIBCXX_CHECK_LINKER_FEATURES above.
2502 glibcxx_min_gnu_ld_version=21400
2504 # If no shared libgcc, can't win.
2505 if test $glibcxx_shared_libgcc != yes; then
2506 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2507 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2508 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2509 enable_symvers=no
2510 elif test $with_gnu_ld != yes ; then
2511 # just fail for now
2512 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2513 AC_MSG_WARN([=== you are not using the GNU linker.])
2514 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2515 enable_symvers=no
2516 elif test $glibcxx_ld_is_gold = yes ; then
2517 : All versions of gold support symbol versioning.
2518 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2519 # The right tools, the right setup, but too old. Fallbacks?
2520 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2521 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2522 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2523 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2524 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2525 enable_symvers=no
2526 fi
2527 fi
2529 # Everything parsed; figure out what file to use.
2530 case $enable_symvers in
2531 no)
2532 SYMVER_FILE=config/abi/pre/none.ver
2533 ;;
2534 gnu)
2535 SYMVER_FILE=config/abi/pre/gnu.ver
2536 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2537 [Define to use GNU versioning in the shared library.])
2538 ;;
2539 gnu-versioned-namespace)
2540 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2541 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2542 [Define to use GNU namespace versioning in the shared library.])
2543 ;;
2544 darwin)
2545 SYMVER_FILE=config/abi/pre/gnu.ver
2546 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2547 [Define to use darwin versioning in the shared library.])
2548 ;;
2549 esac
2551 if test x$enable_symvers != xno ; then
2552 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2553 [Define to use symbol versioning in the shared library.])
2554 fi
2556 AC_SUBST(SYMVER_FILE)
2557 AC_SUBST(port_specific_symbol_files)
2558 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2559 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2560 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2561 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2562 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2564 # Now, set up compatibility support, if any.
2565 # In addition, need this to deal with std::size_t mangling in
2566 # src/compatibility.cc. In a perfect world, could use
2567 # typeid(std::size_t).name()[0] to do direct substitution.
2568 AC_MSG_CHECKING([for size_t as unsigned int])
2569 ac_save_CFLAGS="$CFLAGS"
2570 CFLAGS="-Werror"
2571 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2572 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2573 CFLAGS=$ac_save_CFLAGS
2574 if test "$glibcxx_size_t_is_i" = yes; then
2575 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2576 fi
2577 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2579 AC_MSG_CHECKING([for ptrdiff_t as int])
2580 ac_save_CFLAGS="$CFLAGS"
2581 CFLAGS="-Werror"
2582 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2583 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2584 CFLAGS=$ac_save_CFLAGS
2585 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2586 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2587 fi
2588 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2589 ])
2592 dnl
2593 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2594 dnl We must stage the required headers so that they will be installed
2595 dnl with the library (unlike libgcc, the STL implementation is provided
2596 dnl solely within headers). Since we must not inject random user-space
2597 dnl macro names into user-provided C++ code, we first stage into <file>-in
2598 dnl and process to <file> with an output command. The reason for a two-
2599 dnl stage process here is to correctly handle $srcdir!=$objdir without
2600 dnl having to write complex code (the sed commands to clean the macro
2601 dnl namespace are complex and fragile enough as it is). We must also
2602 dnl add a relative path so that -I- is supported properly.
2603 dnl
2604 dnl Substs:
2605 dnl glibcxx_thread_h
2606 dnl
2607 dnl Defines:
2608 dnl HAVE_GTHR_DEFAULT
2609 dnl
2610 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2611 AC_MSG_CHECKING([for thread model used by GCC])
2612 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2613 AC_MSG_RESULT([$target_thread_file])
2615 if test $target_thread_file != single; then
2616 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2617 [Define if gthr-default.h exists
2618 (meaning that threading support is enabled).])
2619 fi
2621 glibcxx_thread_h=gthr-$target_thread_file.h
2623 dnl Check for __GTHREADS define.
2624 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2625 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2626 enable_thread=yes
2627 else
2628 enable_thread=no
2629 fi
2631 AC_SUBST(glibcxx_thread_h)
2632 ])
2635 # Check whether LC_MESSAGES is available in <locale.h>.
2636 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2637 #
2638 # This file file be copied and used freely without restrictions. It can
2639 # be used in projects which are not available under the GNU Public License
2640 # but which still want to provide support for the GNU gettext functionality.
2641 # Please note that the actual code is *not* freely available.
2642 AC_DEFUN([AC_LC_MESSAGES], [
2643 AC_CHECK_HEADER(locale.h, [
2644 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2645 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2646 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2647 if test $ac_cv_val_LC_MESSAGES = yes; then
2648 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2649 [Define if LC_MESSAGES is available in <locale.h>.])
2650 fi
2651 ])
2652 ])
2654 # Macros from the top-level gcc directory.
2655 m4_include([../config/tls.m4])