| blob | b9f5d3fc1af26ed5a81cf61b2c82bf243f8ea87c |
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 $host.
33 dnl
34 dnl Sets:
35 dnl SUBDIRS
36 dnl Substs:
37 dnl glibcxx_builddir (absolute path)
38 dnl glibcxx_srcdir (absolute path)
39 dnl toplevel_srcdir (absolute path)
40 dnl with_cross_host
41 dnl with_newlib
42 dnl with_target_subdir
43 dnl plus
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
47 dnl
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${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"$USE_MAINTAINER_MODE" = xno; then
166 WERROR=''
167 else
168 WERROR='-Werror'
169 fi
171 # Check for -ffunction-sections -fdata-sections
172 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
173 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
174 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
175 if test "$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($ac_fdsections)
186 AC_LANG_RESTORE
187 AC_SUBST(WERROR)
188 AC_SUBST(SECTION_FLAGS)
189 ])
192 dnl
193 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
194 dnl the native linker is in use, all variables will be defined to something
195 dnl safe (like an empty string).
196 dnl
197 dnl Defines:
198 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
199 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
200 dnl LD (as a side effect of testing)
201 dnl Sets:
202 dnl with_gnu_ld
203 dnl glibcxx_gnu_ld_version (possibly)
204 dnl
205 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
206 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
207 dnl
208 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
209 # If we're not using GNU ld, then there's no point in even trying these
210 # tests. Check for that first. We should have already tested for gld
211 # by now (in libtool), but require it now just to be safe...
212 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
213 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
214 AC_REQUIRE([AC_PROG_LD])
215 AC_REQUIRE([AC_PROG_AWK])
217 # The name set by libtool depends on the version of libtool. Shame on us
218 # for depending on an impl detail, but c'est la vie. Older versions used
219 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
220 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
221 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
222 # set (hence we're using an older libtool), then set it.
223 if test x${with_gnu_ld+set} != xset; then
224 if test x${ac_cv_prog_gnu_ld+set} != xset; then
225 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
226 with_gnu_ld=no
227 else
228 with_gnu_ld=$ac_cv_prog_gnu_ld
229 fi
230 fi
232 # Start by getting the version number. I think the libtool test already
233 # does some of this, but throws away the result.
234 if test x"$with_gnu_ld" = x"yes"; then
235 AC_MSG_CHECKING([for ld version])
236 changequote(,)
237 ldver=`$LD --version 2>/dev/null | head -1 | \
238 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
239 changequote([,])
240 glibcxx_gnu_ld_version=`echo $ldver | \
241 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
242 AC_MSG_RESULT($glibcxx_gnu_ld_version)
243 fi
245 # Set --gc-sections.
246 glibcxx_gcsections_min_ld=21602
247 if test x"$with_gnu_ld" = x"yes" &&
248 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
250 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
251 # NB: This flag only works reliably after 2.16.1. Configure tests
252 # for this are difficult, so hard wire a value that should work.
254 # All these tests are for C++, but run with the "C" compiler driver.
255 # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
256 ac_test_CFLAGS="${CFLAGS+set}"
257 ac_save_CFLAGS="$CFLAGS"
258 CFLAGS='-x c++ -Wl,--gc-sections'
260 # Check for -Wl,--gc-sections
261 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
262 AC_TRY_LINK([ int one(void) { return 1; }
263 int two(void) { return 2; }
264 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
265 if test "$ac_gcsections" = "yes"; then
266 rm -f conftest.c
267 touch conftest.c
268 if $CC -c conftest.c; then
269 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
270 grep "Warning: gc-sections option ignored" > /dev/null; then
271 ac_gcsections=no
272 fi
273 fi
274 rm -f conftest.c conftest.o conftest
275 fi
276 if test "$ac_gcsections" = "yes"; then
277 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
278 fi
279 AC_MSG_RESULT($ac_gcsections)
281 if test "$ac_test_CFLAGS" = set; then
282 CFLAGS="$ac_save_CFLAGS"
283 else
284 # this is the suspicious part
285 CFLAGS=''
286 fi
287 fi
289 # Set -z,relro.
290 # Note this is only for shared objects.
291 ac_ld_relro=no
292 if test x"$with_gnu_ld" = x"yes"; then
293 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
294 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
295 if test -n "$cxx_z_relo"; then
296 OPT_LDFLAGS="-Wl,-z,relro"
297 ac_ld_relro=yes
298 fi
299 AC_MSG_RESULT($ac_ld_relro)
300 fi
302 # Set linker optimization flags.
303 if test x"$with_gnu_ld" = x"yes"; then
304 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
305 fi
307 AC_SUBST(SECTION_LDFLAGS)
308 AC_SUBST(OPT_LDFLAGS)
309 ])
312 dnl
313 dnl Check to see if this target can enable the iconv specializations.
314 dnl If --disable-c-mbchar was given, no wchar_t specialization is enabled.
315 dnl (This must have been previously checked, along with the rest of C99
316 dnl support.) By default, iconv support is disabled.
317 dnl
318 dnl Defines:
319 dnl _GLIBCXX_USE_ICONV if all the bits are found.
320 dnl Substs:
321 dnl LIBICONV to a -l string containing the iconv library, if needed.
322 dnl
323 AC_DEFUN([GLIBCXX_CHECK_ICONV_SUPPORT], [
325 enable_iconv=no
326 # Only continue checking if the ISO C99 headers exist and support is on.
327 if test x"$enable_wchar_t" = xyes; then
329 # From Bruno Haible's AM_ICONV, but without link tests.
330 # Check for existence of libiconv.a providing XPG2 wchar_t support.
331 # Some systems have iconv in libc, some have it in libiconv (OSF/1 and
332 # those with the standalone portable GNU libiconv installed).
333 AC_ARG_WITH([libiconv-prefix],
334 [ --with-libiconv-prefix=DIR search for libiconv in DIR/include and DIR/lib], [ for dir in `echo "$withval" | tr : ' '`; do
335 if test -d $dir/include; then CPPFLAGS="$CPPFLAGS -I$dir/include"; fi
336 if test -d $dir/lib; then LIBICONV="$LIBICONV -L$dir/lib"; fi
337 done
338 LIBICONV="$LIBICONV -liconv"
339 ])
340 if test x"$LIBICONV" != x; then
341 AC_MSG_NOTICE([--with-libiconv-prefix is $LIBICONV])
342 fi
344 # Use iconv for wchar_t to char conversions. As such, check for
345 # X/Open Portability Guide, version 2 features (XPG2).
346 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
347 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
349 ac_save_LIBS="$LIBS"
350 LIBS="$LIBS $LIBICONV"
351 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
352 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
353 LIBS="$ac_save_LIBS"
355 if test x"$ac_has_iconv_h" = xyes &&
356 test x"$ac_has_langinfo_h" = xyes &&
357 test x"$ac_XPG2funcs" = xyes;
358 then
359 AC_DEFINE([_GLIBCXX_USE_ICONV],1,
360 [Define if iconv and related functions exist and are usable.])
361 enable_iconv=yes
362 AC_SUBST(LIBICONV)
363 fi
364 fi
365 AC_MSG_CHECKING([for enabled iconv specializations])
366 AC_MSG_RESULT($enable_iconv)
367 ])
370 dnl
371 dnl Check for headers for, and arguments to, the setrlimit() function.
372 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
373 dnl
374 dnl Defines:
375 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
376 dnl various HAVE_LIMIT_* for individual limit names
377 dnl
378 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
379 AC_MSG_CHECKING([for RLIMIT_$1])
380 AC_TRY_COMPILE(
381 [#include <unistd.h>
382 #include <sys/time.h>
383 #include <sys/resource.h>
384 ],
385 [ int f = RLIMIT_$1 ; ],
386 [glibcxx_mresult=1], [glibcxx_mresult=0])
387 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
388 [Only used in build directory testsuite_hooks.h.])
389 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
390 AC_MSG_RESULT($res)
391 ])
393 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
394 setrlimit_have_headers=yes
395 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
396 [],
397 [setrlimit_have_headers=no])
398 # If don't have the headers, then we can't run the tests now, and we
399 # won't be seeing any of these during testsuite compilation.
400 if test $setrlimit_have_headers = yes; then
401 # Can't do these in a loop, else the resulting syntax is wrong.
402 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
403 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
404 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
405 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
406 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
408 # Check for rlimit, setrlimit.
409 AC_CACHE_VAL(ac_setrlimit, [
410 AC_TRY_COMPILE(
411 [#include <unistd.h>
412 #include <sys/time.h>
413 #include <sys/resource.h>
414 ],
415 [struct rlimit r;
416 setrlimit(0, &r);],
417 [ac_setrlimit=yes], [ac_setrlimit=no])
418 ])
419 fi
421 AC_MSG_CHECKING([for testsuite resource limits support])
422 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
423 ac_res_limits=yes
424 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
425 [Define if using setrlimit to set resource limits during
426 "make check"])
427 else
428 ac_res_limits=no
429 fi
430 AC_MSG_RESULT($ac_res_limits)
431 ])
434 dnl
435 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
436 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
437 dnl
438 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
439 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
440 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
441 AC_TRY_LINK(
442 [#include <sys/stat.h>],
443 [struct stat buffer;
444 fstat(0, &buffer);
445 S_ISREG(buffer.st_mode);],
446 [glibcxx_cv_S_ISREG=yes],
447 [glibcxx_cv_S_ISREG=no])
448 ])
449 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
450 AC_TRY_LINK(
451 [#include <sys/stat.h>],
452 [struct stat buffer;
453 fstat(0, &buffer);
454 S_IFREG & buffer.st_mode;],
455 [glibcxx_cv_S_IFREG=yes],
456 [glibcxx_cv_S_IFREG=no])
457 ])
458 res=no
459 if test $glibcxx_cv_S_ISREG = yes; then
460 AC_DEFINE(HAVE_S_ISREG, 1,
461 [Define if S_IFREG is available in <sys/stat.h>.])
462 res=S_ISREG
463 elif test $glibcxx_cv_S_IFREG = yes; then
464 AC_DEFINE(HAVE_S_IFREG, 1,
465 [Define if S_IFREG is available in <sys/stat.h>.])
466 res=S_IFREG
467 fi
468 AC_MSG_RESULT($res)
469 ])
472 dnl
473 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
474 dnl
475 AC_DEFUN([GLIBCXX_CHECK_POLL], [
476 AC_MSG_CHECKING([for poll])
477 AC_CACHE_VAL(glibcxx_cv_POLL, [
478 AC_TRY_LINK(
479 [#include <poll.h>],
480 [struct pollfd pfd[1];
481 pfd[0].events = POLLIN;
482 poll(pfd, 1, 0);],
483 [glibcxx_cv_POLL=yes],
484 [glibcxx_cv_POLL=no])
485 ])
486 if test $glibcxx_cv_POLL = yes; then
487 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
488 fi
489 AC_MSG_RESULT($glibcxx_cv_POLL)
490 ])
493 dnl
494 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
495 dnl
496 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
497 AC_MSG_CHECKING([for writev])
498 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
499 AC_TRY_LINK(
500 [#include <sys/uio.h>],
501 [struct iovec iov[2];
502 writev(0, iov, 0);],
503 [glibcxx_cv_WRITEV=yes],
504 [glibcxx_cv_WRITEV=no])
505 ])
506 if test $glibcxx_cv_WRITEV = yes; then
507 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
508 fi
509 AC_MSG_RESULT($glibcxx_cv_WRITEV)
510 ])
513 dnl
514 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
515 dnl
516 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
517 AC_MSG_CHECKING([for int64_t])
518 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
519 AC_TRY_COMPILE(
520 [#include <stdint.h>],
521 [int64_t var;],
522 [glibcxx_cv_INT64_T=yes],
523 [glibcxx_cv_INT64_T=no])
524 ])
525 if test $glibcxx_cv_INT64_T = yes; then
526 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
527 fi
528 AC_MSG_RESULT($glibcxx_cv_INT64_T)
529 ])
532 dnl
533 dnl Check whether LFS support is available.
534 dnl
535 AC_DEFUN([GLIBCXX_CHECK_LFS], [
536 AC_LANG_SAVE
537 AC_LANG_CPLUSPLUS
538 ac_save_CXXFLAGS="$CXXFLAGS"
539 CXXFLAGS="$CXXFLAGS -fno-exceptions"
540 AC_MSG_CHECKING([for LFS support])
541 AC_CACHE_VAL(glibcxx_cv_LFS, [
542 AC_TRY_LINK(
543 [#include <unistd.h>
544 #include <stdio.h>
545 #include <sys/stat.h>
546 ],
547 [FILE* fp;
548 fopen64("t", "w");
549 fseeko64(fp, 0, SEEK_CUR);
550 ftello64(fp);
551 lseek64(1, 0, SEEK_CUR);
552 struct stat64 buf;
553 fstat64(1, &buf);],
554 [glibcxx_cv_LFS=yes],
555 [glibcxx_cv_LFS=no])
556 ])
557 if test $glibcxx_cv_LFS = yes; then
558 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
559 fi
560 AC_MSG_RESULT($glibcxx_cv_LFS)
561 CXXFLAGS="$ac_save_CXXFLAGS"
562 AC_LANG_RESTORE
563 ])
566 dnl
567 dnl Check for whether a fully dynamic basic_string implementation should
568 dnl be turned on, that does not put empty objects in per-process static
569 dnl memory (mostly useful together with shared memory allocators, see PR
570 dnl libstdc++/16612 for details).
571 dnl
572 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
573 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
574 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
575 dnl Where DEFAULT is either `yes' or `no'.
576 dnl
577 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
578 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
579 if test $enable_fully_dynamic_string = yes; then
580 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
581 [Define if a fully dynamic basic_string is wanted.])
582 fi
583 ])
586 dnl
587 dnl Does any necessary configuration of the testsuite directory. Generates
588 dnl the testsuite_hooks.h header.
589 dnl
590 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
591 dnl
592 dnl Sets:
593 dnl enable_abi_check
594 dnl GLIBCXX_TEST_WCHAR_T
595 dnl GLIBCXX_TEST_THREAD
596 dnl Substs:
597 dnl baseline_dir
598 dnl
599 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
600 if $GLIBCXX_IS_NATIVE ; then
601 # Do checks for resource limit functions.
602 GLIBCXX_CHECK_SETRLIMIT
604 # Look for setenv, so that extended locale tests can be performed.
605 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
606 fi
608 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
609 test $enable_symvers != no; then
610 case "$host" in
611 *-*-cygwin*)
612 enable_abi_check=no ;;
613 *)
614 enable_abi_check=yes ;;
615 esac
616 else
617 # Only build this as native, since automake does not understand
618 # CXX_FOR_BUILD.
619 enable_abi_check=no
620 fi
622 # Export file names for ABI checking.
623 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
624 AC_SUBST(baseline_dir)
625 ])
628 dnl
629 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
630 dnl
631 dnl Substs:
632 dnl GLIBCXX_INCLUDES
633 dnl TOPLEVEL_INCLUDES
634 dnl
635 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
636 # Used for every C++ compile we perform.
637 GLIBCXX_INCLUDES="\
638 -I$glibcxx_builddir/include/$host_alias \
639 -I$glibcxx_builddir/include \
640 -I$glibcxx_srcdir/libsupc++"
642 # For Canadian crosses, pick this up too.
643 if test $CANADIAN = yes; then
644 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
645 fi
647 # Stuff in the actual top level. Currently only used by libsupc++ to
648 # get unwind* headers from the gcc dir.
649 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
650 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
652 # Now, export this to all the little Makefiles....
653 AC_SUBST(GLIBCXX_INCLUDES)
654 AC_SUBST(TOPLEVEL_INCLUDES)
655 ])
658 dnl
659 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
660 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
661 dnl
662 dnl Substs:
663 dnl OPTIMIZE_CXXFLAGS
664 dnl WARN_FLAGS
665 dnl
666 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
667 # Optimization flags that are probably a good idea for thrill-seekers. Just
668 # uncomment the lines below and make, everything else is ready to go...
669 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
670 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
671 AC_SUBST(OPTIMIZE_CXXFLAGS)
673 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
674 AC_SUBST(WARN_FLAGS)
675 ])
678 dnl
679 dnl All installation directory information is determined here.
680 dnl
681 dnl Substs:
682 dnl gxx_install_dir
683 dnl glibcxx_prefixdir
684 dnl glibcxx_toolexecdir
685 dnl glibcxx_toolexeclibdir
686 dnl
687 dnl Assumes cross_compiling bits already done, and with_cross_host in
688 dnl particular.
689 dnl
690 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
691 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
692 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
693 glibcxx_toolexecdir=no
694 glibcxx_toolexeclibdir=no
695 glibcxx_prefixdir=$prefix
697 AC_MSG_CHECKING([for gxx-include-dir])
698 AC_ARG_WITH([gxx-include-dir],
699 AC_HELP_STRING([--with-gxx-include-dir=DIR],
700 [installation directory for include files]),
701 [case "$withval" in
702 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
703 no) gxx_include_dir=no ;;
704 *) gxx_include_dir=$withval ;;
705 esac],
706 [gxx_include_dir=no])
707 AC_MSG_RESULT($gxx_include_dir)
709 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
710 AC_ARG_ENABLE([version-specific-runtime-libs],
711 AC_HELP_STRING([--enable-version-specific-runtime-libs],
712 [Specify that runtime libraries should be installed in a compiler-specific directory]),
713 [case "$enableval" in
714 yes) version_specific_libs=yes ;;
715 no) version_specific_libs=no ;;
716 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
717 esac],
718 [version_specific_libs=no])
719 AC_MSG_RESULT($version_specific_libs)
721 # Default case for install directory for include files.
722 if test $version_specific_libs = no && test $gxx_include_dir = no; then
723 gxx_include_dir='include/c++/${gcc_version}'
724 if test -n "$with_cross_host" &&
725 test x"$with_cross_host" != x"no"; then
726 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
727 else
728 gxx_include_dir='${prefix}/'"$gxx_include_dir"
729 fi
730 fi
732 # Version-specific runtime libs processing.
733 if test $version_specific_libs = yes; then
734 # Need the gcc compiler version to know where to install libraries
735 # and header files if --enable-version-specific-runtime-libs option
736 # is selected. FIXME: these variables are misnamed, there are
737 # no executables installed in _toolexecdir or _toolexeclibdir.
738 if test x"$gxx_include_dir" = x"no"; then
739 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
740 fi
741 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
742 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
743 fi
745 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
746 # Install a library built with a cross compiler in tooldir, not libdir.
747 if test x"$glibcxx_toolexecdir" = x"no"; then
748 if test -n "$with_cross_host" &&
749 test x"$with_cross_host" != x"no"; then
750 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
751 glibcxx_toolexeclibdir='${toolexecdir}/lib'
752 else
753 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
754 glibcxx_toolexeclibdir='${libdir}'
755 fi
756 multi_os_directory=`$CXX -print-multi-os-directory`
757 case $multi_os_directory in
758 .) ;; # Avoid trailing /.
759 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
760 esac
761 fi
763 AC_MSG_CHECKING([for install location])
764 AC_MSG_RESULT($gxx_include_dir)
766 AC_SUBST(glibcxx_prefixdir)
767 AC_SUBST(gxx_include_dir)
768 AC_SUBST(glibcxx_toolexecdir)
769 AC_SUBST(glibcxx_toolexeclibdir)
770 ])
773 dnl
774 dnl GLIBCXX_ENABLE
775 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
776 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
777 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
778 dnl
779 dnl See docs/html/17_intro/configury.html#enable for documentation.
780 dnl
781 m4_define([GLIBCXX_ENABLE],[dnl
782 m4_define([_g_switch],[--enable-$1])dnl
783 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
784 AC_ARG_ENABLE($1,_g_help,
785 m4_bmatch([$5],
786 [^permit ],
787 [[
788 case "$enableval" in
789 m4_bpatsubst([$5],[permit ])) ;;
790 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
791 dnl Idea for future: generate a URL pointing to
792 dnl "onlinedocs/configopts.html#whatever"
793 esac
794 ]],
795 [^$],
796 [[
797 case "$enableval" in
798 yes|no) ;;
799 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
800 esac
801 ]],
802 [[$5]]),
803 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
804 m4_undefine([_g_switch])dnl
805 m4_undefine([_g_help])dnl
806 ])
809 dnl
810 dnl Check for ISO/IEC 9899:1999 "C99" support.
811 dnl
812 dnl --enable-c99 defines _GLIBCXX_USE_C99
813 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
814 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
815 dnl Where DEFAULT is either `yes' or `no'.
816 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
817 dnl
818 AC_DEFUN([GLIBCXX_ENABLE_C99], [
819 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
821 if test x"$enable_c99" = x"yes"; then
823 AC_LANG_SAVE
824 AC_LANG_CPLUSPLUS
826 # Check for the existence of <math.h> functions used if C99 is enabled.
827 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
828 AC_CACHE_VAL(ac_c99_math, [
829 AC_TRY_COMPILE([#include <math.h>],
830 [fpclassify(0.0);
831 isfinite(0.0);
832 isinf(0.0);
833 isnan(0.0);
834 isnormal(0.0);
835 signbit(0.0);
836 isgreater(0.0,0.0);
837 isgreaterequal(0.0,0.0);
838 isless(0.0,0.0);
839 islessequal(0.0,0.0);
840 islessgreater(0.0,0.0);
841 islessgreater(0.0,0.0);
842 isunordered(0.0,0.0);
843 ],[ac_c99_math=yes], [ac_c99_math=no])
844 ])
845 AC_MSG_RESULT($ac_c99_math)
846 if test x"$ac_c99_math" = x"yes"; then
847 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
848 [Define if C99 functions or macros in <math.h> should be imported
849 in <cmath> in namespace std.])
850 fi
852 # Check for the existence of <complex.h> complex math functions.
853 # This is necessary even though libstdc++ uses the builtin versions
854 # of these functions, because if the builtin cannot be used, a reference
855 # to the library function is emitted.
856 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
857 ac_c99_complex=no;
858 if test x"$ac_has_complex_h" = x"yes"; then
859 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
860 AC_TRY_COMPILE([#include <complex.h>],
861 [typedef __complex__ float float_type; float_type tmpf;
862 cabsf(tmpf);
863 cargf(tmpf);
864 ccosf(tmpf);
865 ccoshf(tmpf);
866 cexpf(tmpf);
867 clogf(tmpf);
868 csinf(tmpf);
869 csinhf(tmpf);
870 csqrtf(tmpf);
871 ctanf(tmpf);
872 ctanhf(tmpf);
873 cpowf(tmpf, tmpf);
874 typedef __complex__ double double_type; double_type tmpd;
875 cabs(tmpd);
876 carg(tmpd);
877 ccos(tmpd);
878 ccosh(tmpd);
879 cexp(tmpd);
880 clog(tmpd);
881 csin(tmpd);
882 csinh(tmpd);
883 csqrt(tmpd);
884 ctan(tmpd);
885 ctanh(tmpd);
886 cpow(tmpd, tmpd);
887 typedef __complex__ long double ld_type; ld_type tmpld;
888 cabsl(tmpld);
889 cargl(tmpld);
890 ccosl(tmpld);
891 ccoshl(tmpld);
892 cexpl(tmpld);
893 clogl(tmpld);
894 csinl(tmpld);
895 csinhl(tmpld);
896 csqrtl(tmpld);
897 ctanl(tmpld);
898 ctanhl(tmpld);
899 cpowl(tmpld, tmpld);
900 ],[ac_c99_complex=yes], [ac_c99_complex=no])
901 fi
902 AC_MSG_RESULT($ac_c99_complex)
903 if test x"$ac_c99_complex" = x"yes"; then
904 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
905 [Define if C99 functions in <complex.h> should be used in
906 <complex>. Using compiler builtins for these functions requires
907 corresponding C99 library functions to be present.])
908 fi
910 # Check for the existence in <stdio.h> of vscanf, et. al.
911 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
912 AC_CACHE_VAL(ac_c99_stdio, [
913 AC_TRY_COMPILE([#include <stdio.h>
914 #include <stdarg.h>
915 void foo(char* fmt, ...)
916 {
917 va_list args; va_start(args, fmt);
918 vfscanf(stderr, "%i", args);
919 vscanf("%i", args);
920 vsnprintf(fmt, 0, "%i", args);
921 vsscanf(fmt, "%i", args);
922 }],
923 [snprintf("12", 0, "%i");],
924 [ac_c99_stdio=yes], [ac_c99_stdio=no])
925 ])
926 AC_MSG_RESULT($ac_c99_stdio)
928 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
929 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
930 AC_CACHE_VAL(ac_c99_stdlib, [
931 AC_TRY_COMPILE([#include <stdlib.h>],
932 [char* tmp;
933 strtof("gnu", &tmp);
934 strtold("gnu", &tmp);
935 strtoll("gnu", &tmp, 10);
936 strtoull("gnu", &tmp, 10);
937 llabs(10);
938 lldiv(10,1);
939 atoll("10");
940 _Exit(0);
941 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
942 ])
943 AC_MSG_RESULT($ac_c99_stdlib)
945 # Check for the existence in <wchar.h> of wcstold, etc.
946 ac_c99_wchar=no;
947 if test x"$ac_has_wchar_h" = xyes &&
948 test x"$ac_has_wctype_h" = xyes; then
949 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
950 AC_TRY_COMPILE([#include <wchar.h>
951 namespace test
952 {
953 using ::wcstold;
954 using ::wcstoll;
955 using ::wcstoull;
956 }
957 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
959 # Checks for wide character functions that may not be present.
960 # Injection of these is wrapped with guard macros.
961 # NB: only put functions here, instead of immediately above, if
962 # absolutely necessary.
963 AC_TRY_COMPILE([#include <wchar.h>
964 namespace test { using ::vfwscanf; } ], [],
965 [AC_DEFINE(HAVE_VFWSCANF,1,
966 [Defined if vfwscanf exists.])],[])
968 AC_TRY_COMPILE([#include <wchar.h>
969 namespace test { using ::vswscanf; } ], [],
970 [AC_DEFINE(HAVE_VSWSCANF,1,
971 [Defined if vswscanf exists.])],[])
973 AC_TRY_COMPILE([#include <wchar.h>
974 namespace test { using ::vwscanf; } ], [],
975 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
977 AC_TRY_COMPILE([#include <wchar.h>
978 namespace test { using ::wcstof; } ], [],
979 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
981 AC_TRY_COMPILE([#include <wctype.h>],
982 [ wint_t t; int i = iswblank(t);],
983 [AC_DEFINE(HAVE_ISWBLANK,1,
984 [Defined if iswblank exists.])],[])
986 AC_MSG_RESULT($ac_c99_wchar)
987 fi
989 # Option parsed, now set things appropriately.
990 if test x"$ac_c99_math" = x"no" ||
991 test x"$ac_c99_complex" = x"no" ||
992 test x"$ac_c99_stdio" = x"no" ||
993 test x"$ac_c99_stdlib" = x"no" ||
994 test x"$ac_c99_wchar" = x"no"; then
995 enable_c99=no;
996 else
997 AC_DEFINE(_GLIBCXX_USE_C99, 1,
998 [Define if C99 functions or macros from <wchar.h>, <math.h>,
999 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1000 fi
1002 AC_LANG_RESTORE
1003 fi
1005 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1006 AC_MSG_RESULT($enable_c99)
1007 ])
1010 dnl
1011 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1012 dnl facilities in Chapter 8, "C compatibility".
1013 dnl
1014 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1016 AC_LANG_SAVE
1017 AC_LANG_CPLUSPLUS
1019 # Check for the existence of <complex.h> complex math functions used
1020 # by tr1/complex.
1021 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1022 ac_c99_complex_tr1=no;
1023 if test x"$ac_has_complex_h" = x"yes"; then
1024 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1025 AC_TRY_COMPILE([#include <complex.h>],
1026 [typedef __complex__ float float_type; float_type tmpf;
1027 cacosf(tmpf);
1028 casinf(tmpf);
1029 catanf(tmpf);
1030 cacoshf(tmpf);
1031 casinhf(tmpf);
1032 catanhf(tmpf);
1033 typedef __complex__ double double_type; double_type tmpd;
1034 cacos(tmpd);
1035 casin(tmpd);
1036 catan(tmpd);
1037 cacosh(tmpd);
1038 casinh(tmpd);
1039 catanh(tmpd);
1040 typedef __complex__ long double ld_type; ld_type tmpld;
1041 cacosl(tmpld);
1042 casinl(tmpld);
1043 catanl(tmpld);
1044 cacoshl(tmpld);
1045 casinhl(tmpld);
1046 catanhl(tmpld);
1047 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1048 fi
1049 AC_MSG_RESULT($ac_c99_complex_tr1)
1050 if test x"$ac_c99_complex_tr1" = x"yes"; then
1051 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1052 [Define if C99 functions in <complex.h> should be used in
1053 <tr1/complex>. Using compiler builtins for these functions
1054 requires corresponding C99 library functions to be present.])
1055 fi
1057 # Check for the existence of <ctype.h> functions.
1058 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1059 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1060 AC_TRY_COMPILE([#include <ctype.h>],
1061 [int ch;
1062 int ret;
1063 ret = isblank(ch);
1064 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1065 ])
1066 AC_MSG_RESULT($ac_c99_ctype_tr1)
1067 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1068 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1069 [Define if C99 functions in <ctype.h> should be imported in
1070 <tr1/cctype> in namespace std::tr1.])
1071 fi
1073 # Check for the existence of <fenv.h> functions.
1074 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1075 ac_c99_fenv_tr1=no;
1076 if test x"$ac_has_fenv_h" = x"yes"; then
1077 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1078 AC_TRY_COMPILE([#include <fenv.h>],
1079 [int except, mode;
1080 fexcept_t* pflag;
1081 fenv_t* penv;
1082 int ret;
1083 ret = feclearexcept(except);
1084 ret = fegetexceptflag(pflag, except);
1085 ret = feraiseexcept(except);
1086 ret = fesetexceptflag(pflag, except);
1087 ret = fetestexcept(except);
1088 ret = fegetround();
1089 ret = fesetround(mode);
1090 ret = fegetenv(penv);
1091 ret = feholdexcept(penv);
1092 ret = fesetenv(penv);
1093 ret = feupdateenv(penv);
1094 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1095 fi
1096 AC_MSG_RESULT($ac_c99_fenv_tr1)
1097 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1098 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1099 [Define if C99 functions in <fenv.h> should be imported in
1100 <tr1/cfenv> in namespace std::tr1.])
1101 fi
1103 # Check for the existence of <stdint.h> types.
1104 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1105 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1106 AC_TRY_COMPILE([#include <stdint.h>],
1107 [typedef int8_t my_int8_t;
1108 typedef int16_t my_int16_t;
1109 typedef int32_t my_int32_t;
1110 typedef int64_t my_int64_t;
1111 typedef int_fast8_t my_int_fast8_t;
1112 typedef int_fast16_t my_int_fast16_t;
1113 typedef int_fast32_t my_int_fast32_t;
1114 typedef int_fast64_t my_int_fast64_t;
1115 typedef int_least8_t my_int_least8_t;
1116 typedef int_least16_t my_int_least16_t;
1117 typedef int_least32_t my_int_least32_t;
1118 typedef int_least64_t my_int_least64_t;
1119 typedef intmax_t my_intmax_t;
1120 typedef intptr_t my_intptr_t;
1121 typedef uint8_t my_uint8_t;
1122 typedef uint16_t my_uint16_t;
1123 typedef uint32_t my_uint32_t;
1124 typedef uint64_t my_uint64_t;
1125 typedef uint_fast8_t my_uint_fast8_t;
1126 typedef uint_fast16_t my_uint_fast16_t;
1127 typedef uint_fast32_t my_uint_fast32_t;
1128 typedef uint_fast64_t my_uint_fast64_t;
1129 typedef uint_least8_t my_uint_least8_t;
1130 typedef uint_least16_t my_uint_least16_t;
1131 typedef uint_least32_t my_uint_least32_t;
1132 typedef uint_least64_t my_uint_least64_t;
1133 typedef uintmax_t my_uintmax_t;
1134 typedef uintptr_t my_uintptr_t;
1135 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1136 ])
1137 AC_MSG_RESULT($ac_c99_stdint_tr1)
1138 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1139 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1140 [Define if C99 types in <stdint.h> should be imported in
1141 <tr1/cstdint> in namespace std::tr1.])
1142 fi
1144 # Check for the existence of <math.h> functions.
1145 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1146 AC_CACHE_VAL(ac_c99_math_tr1, [
1147 AC_TRY_COMPILE([#include <math.h>],
1148 [typedef double_t my_double_t;
1149 typedef float_t my_float_t;
1150 acosh(0.0);
1151 acoshf(0.0f);
1152 acoshl(0.0l);
1153 asinh(0.0);
1154 asinhf(0.0f);
1155 asinhl(0.0l);
1156 atanh(0.0);
1157 atanhf(0.0f);
1158 atanhl(0.0l);
1159 cbrt(0.0);
1160 cbrtf(0.0f);
1161 cbrtl(0.0l);
1162 copysign(0.0, 0.0);
1163 copysignf(0.0f, 0.0f);
1164 copysignl(0.0l, 0.0l);
1165 erf(0.0);
1166 erff(0.0f);
1167 erfl(0.0l);
1168 erfc(0.0);
1169 erfcf(0.0f);
1170 erfcl(0.0l);
1171 exp2(0.0);
1172 exp2f(0.0f);
1173 exp2l(0.0l);
1174 expm1(0.0);
1175 expm1f(0.0f);
1176 expm1l(0.0l);
1177 fdim(0.0, 0.0);
1178 fdimf(0.0f, 0.0f);
1179 fdiml(0.0l, 0.0l);
1180 fma(0.0, 0.0, 0.0);
1181 fmaf(0.0f, 0.0f, 0.0f);
1182 fmal(0.0l, 0.0l, 0.0l);
1183 fmax(0.0, 0.0);
1184 fmaxf(0.0f, 0.0f);
1185 fmaxl(0.0l, 0.0l);
1186 fmin(0.0, 0.0);
1187 fminf(0.0f, 0.0f);
1188 fminl(0.0l, 0.0l);
1189 hypot(0.0, 0.0);
1190 hypotf(0.0f, 0.0f);
1191 hypotl(0.0l, 0.0l);
1192 ilogb(0.0);
1193 ilogbf(0.0f);
1194 ilogbl(0.0l);
1195 lgamma(0.0);
1196 lgammaf(0.0f);
1197 lgammal(0.0l);
1198 llrint(0.0);
1199 llrintf(0.0f);
1200 llrintl(0.0l);
1201 llround(0.0);
1202 llroundf(0.0f);
1203 llroundl(0.0l);
1204 log1p(0.0);
1205 log1pf(0.0f);
1206 log1pl(0.0l);
1207 log2(0.0);
1208 log2f(0.0f);
1209 log2l(0.0l);
1210 logb(0.0);
1211 logbf(0.0f);
1212 logbl(0.0l);
1213 lrint(0.0);
1214 lrintf(0.0f);
1215 lrintl(0.0l);
1216 lround(0.0);
1217 lroundf(0.0f);
1218 lroundl(0.0l);
1219 nan(0);
1220 nanf(0);
1221 nanl(0);
1222 nearbyint(0.0);
1223 nearbyintf(0.0f);
1224 nearbyintl(0.0l);
1225 nextafter(0.0, 0.0);
1226 nextafterf(0.0f, 0.0f);
1227 nextafterl(0.0l, 0.0l);
1228 nexttoward(0.0, 0.0);
1229 nexttowardf(0.0f, 0.0f);
1230 nexttowardl(0.0l, 0.0l);
1231 remainder(0.0, 0.0);
1232 remainderf(0.0f, 0.0f);
1233 remainderl(0.0l, 0.0l);
1234 remquo(0.0, 0.0, 0);
1235 remquo(0.0f, 0.0f, 0);
1236 remquo(0.0l, 0.0l, 0);
1237 rint(0.0);
1238 rintf(0.0f);
1239 rintl(0.0l);
1240 round(0.0);
1241 roundf(0.0f);
1242 roundl(0.0l);
1243 scalbln(0.0, 0l);
1244 scalblnf(0.0f, 0l);
1245 scalblnl(0.0l, 0l);
1246 scalbn(0.0, 0);
1247 scalbnf(0.0f, 0);
1248 scalbnl(0.0l, 0);
1249 tgamma(0.0);
1250 tgammaf(0.0f);
1251 tgammal(0.0l);
1252 trunc(0.0);
1253 truncf(0.0f);
1254 truncl(0.0l);
1255 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1256 ])
1257 AC_MSG_RESULT($ac_c99_math_tr1)
1258 if test x"$ac_c99_math_tr1" = x"yes"; then
1259 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1260 [Define if C99 functions or macros in <math.h> should be imported
1261 in <tr1/cmath> in namespace std::tr1.])
1262 fi
1264 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1265 # sense if the previous check fails, per C99, 7.8/1).
1266 ac_c99_inttypes_tr1=no;
1267 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1268 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1269 AC_TRY_COMPILE([#include <inttypes.h>],
1270 [intmax_t i, numer, denom, base;
1271 const char* s;
1272 char** endptr;
1273 intmax_t ret = imaxabs(i);
1274 imaxdiv_t dret = imaxdiv(numer, denom);
1275 ret = strtoimax(s, endptr, base);
1276 uintmax_t uret = strtoumax(s, endptr, base);
1277 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1278 fi
1279 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1280 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1281 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1282 [Define if C99 functions in <inttypes.h> should be imported in
1283 <tr1/cinttypes> in namespace std::tr1.])
1284 fi
1286 # Check for the existence of the <stdbool.h> header.
1287 AC_CHECK_HEADERS(stdbool.h)
1289 AC_LANG_RESTORE
1290 ])
1292 dnl
1293 dnl Check whether "dev/random" and "dev/urandom" are available for the
1294 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1295 dnl
1296 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1298 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1299 AC_CACHE_VAL(ac_random_tr1, [
1300 AC_TRY_RUN([#include <stdio.h>
1301 int main()
1302 {
1303 return !(fopen("/dev/random", "r")
1304 && fopen("/dev/urandom", "r"));
1305 }
1306 ],
1307 [ac_random_tr1=yes], [ac_random_tr1=no],
1308 [ac_random_tr1=no])
1309 ])
1310 AC_MSG_RESULT($ac_random_tr1)
1311 if test x"$ac_random_tr1" = x"yes"; then
1312 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1313 [Define if dev/random and dev/urandom are available for
1314 the random_device of TR1 (Chapter 5.1).])
1315 fi
1317 ])
1319 dnl
1320 dnl Check for what type of C headers to use.
1321 dnl
1322 dnl --enable-cheaders= [does stuff].
1323 dnl --disable-cheaders [does not do anything, really].
1324 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1325 dnl Where DEFAULT is either `c' or `c_std'.
1326 dnl
1327 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1328 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1329 [construct "C" headers for g++], [permit c|c_std])
1330 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1332 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1334 AC_SUBST(C_INCLUDE_DIR)
1335 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1336 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1337 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1338 ])
1341 dnl
1342 dnl Check for which locale library to use. The choice is mapped to
1343 dnl a subdirectory of config/locale.
1344 dnl
1345 dnl Default is generic.
1346 dnl
1347 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1348 AC_MSG_CHECKING([for C locale to use])
1349 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1350 [use MODEL for target locale package],
1351 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1353 # If they didn't use this option switch, or if they specified --enable
1354 # with no specific model, we'll have to look for one. If they
1355 # specified --disable (???), do likewise.
1356 if test $enable_clocale = no || test $enable_clocale = yes; then
1357 enable_clocale=auto
1358 fi
1360 # Either a known package, or "auto"
1361 enable_clocale_flag=$enable_clocale
1363 # Probe for locale support if no specific model is specified.
1364 # Default to "generic".
1365 if test $enable_clocale_flag = auto; then
1366 case ${target_os} in
1367 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1368 AC_EGREP_CPP([_GLIBCXX_ok], [
1369 #include <features.h>
1370 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1371 _GLIBCXX_ok
1372 #endif
1373 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1375 # Test for bugs early in glibc-2.2.x series
1376 if test $enable_clocale_flag = gnu; then
1377 AC_TRY_RUN([
1378 #define _GNU_SOURCE 1
1379 #include <locale.h>
1380 #include <string.h>
1381 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1382 extern __typeof(newlocale) __newlocale;
1383 extern __typeof(duplocale) __duplocale;
1384 extern __typeof(strcoll_l) __strcoll_l;
1385 #endif
1386 int main()
1387 {
1388 const char __one[] = "Äuglein Augmen";
1389 const char __two[] = "Äuglein";
1390 int i;
1391 int j;
1392 __locale_t loc;
1393 __locale_t loc_dup;
1394 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1395 loc_dup = __duplocale(loc);
1396 i = __strcoll_l(__one, __two, loc);
1397 j = __strcoll_l(__one, __two, loc_dup);
1398 return 0;
1399 }
1400 ],
1401 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1402 [enable_clocale_flag=generic])
1403 fi
1405 # ... at some point put __strxfrm_l tests in as well.
1406 ;;
1407 darwin* | freebsd*)
1408 enable_clocale_flag=darwin
1409 ;;
1410 *)
1411 enable_clocale_flag=generic
1412 ;;
1413 esac
1414 fi
1416 # Deal with gettext issues. Default to not using it (=no) until we detect
1417 # support for it later. Let the user turn it off via --e/d, but let that
1418 # default to on for easier handling.
1419 USE_NLS=no
1420 AC_ARG_ENABLE(nls,
1421 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1422 [],
1423 [enable_nls=yes])
1425 # Set configure bits for specified locale package
1426 case ${enable_clocale_flag} in
1427 generic)
1428 AC_MSG_RESULT(generic)
1430 CLOCALE_H=config/locale/generic/c_locale.h
1431 CLOCALE_CC=config/locale/generic/c_locale.cc
1432 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1433 CCOLLATE_CC=config/locale/generic/collate_members.cc
1434 CCTYPE_CC=config/locale/generic/ctype_members.cc
1435 CMESSAGES_H=config/locale/generic/messages_members.h
1436 CMESSAGES_CC=config/locale/generic/messages_members.cc
1437 CMONEY_CC=config/locale/generic/monetary_members.cc
1438 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1439 CTIME_H=config/locale/generic/time_members.h
1440 CTIME_CC=config/locale/generic/time_members.cc
1441 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1442 ;;
1443 darwin)
1444 AC_MSG_RESULT(darwin or freebsd)
1446 CLOCALE_H=config/locale/generic/c_locale.h
1447 CLOCALE_CC=config/locale/generic/c_locale.cc
1448 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1449 CCOLLATE_CC=config/locale/generic/collate_members.cc
1450 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1451 CMESSAGES_H=config/locale/generic/messages_members.h
1452 CMESSAGES_CC=config/locale/generic/messages_members.cc
1453 CMONEY_CC=config/locale/generic/monetary_members.cc
1454 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1455 CTIME_H=config/locale/generic/time_members.h
1456 CTIME_CC=config/locale/generic/time_members.cc
1457 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1458 ;;
1460 gnu)
1461 AC_MSG_RESULT(gnu)
1463 # Declare intention to use gettext, and add support for specific
1464 # languages.
1465 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1466 ALL_LINGUAS="de fr"
1468 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1469 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1470 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1471 USE_NLS=yes
1472 fi
1473 # Export the build objects.
1474 for ling in $ALL_LINGUAS; do \
1475 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1476 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1477 done
1478 AC_SUBST(glibcxx_MOFILES)
1479 AC_SUBST(glibcxx_POFILES)
1481 CLOCALE_H=config/locale/gnu/c_locale.h
1482 CLOCALE_CC=config/locale/gnu/c_locale.cc
1483 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1484 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1485 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1486 CMESSAGES_H=config/locale/gnu/messages_members.h
1487 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1488 CMONEY_CC=config/locale/gnu/monetary_members.cc
1489 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1490 CTIME_H=config/locale/gnu/time_members.h
1491 CTIME_CC=config/locale/gnu/time_members.cc
1492 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1493 ;;
1494 ieee_1003.1-2001)
1495 AC_MSG_RESULT(IEEE 1003.1)
1497 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1498 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1499 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1500 CCOLLATE_CC=config/locale/generic/collate_members.cc
1501 CCTYPE_CC=config/locale/generic/ctype_members.cc
1502 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1503 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1504 CMONEY_CC=config/locale/generic/monetary_members.cc
1505 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1506 CTIME_H=config/locale/generic/time_members.h
1507 CTIME_CC=config/locale/generic/time_members.cc
1508 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1509 ;;
1510 esac
1512 # This is where the testsuite looks for locale catalogs, using the
1513 # -DLOCALEDIR define during testsuite compilation.
1514 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1515 AC_SUBST(glibcxx_localedir)
1517 # A standalone libintl (e.g., GNU libintl) may be in use.
1518 if test $USE_NLS = yes; then
1519 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1520 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1521 fi
1522 if test $USE_NLS = yes; then
1523 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1524 [Define if NLS translations are to be used.])
1525 fi
1527 AC_SUBST(USE_NLS)
1528 AC_SUBST(CLOCALE_H)
1529 AC_SUBST(CMESSAGES_H)
1530 AC_SUBST(CCODECVT_CC)
1531 AC_SUBST(CCOLLATE_CC)
1532 AC_SUBST(CCTYPE_CC)
1533 AC_SUBST(CMESSAGES_CC)
1534 AC_SUBST(CMONEY_CC)
1535 AC_SUBST(CNUMERIC_CC)
1536 AC_SUBST(CTIME_H)
1537 AC_SUBST(CTIME_CC)
1538 AC_SUBST(CLOCALE_CC)
1539 AC_SUBST(CLOCALE_INTERNAL_H)
1540 ])
1543 dnl
1544 dnl Check for which std::allocator base class to use. The choice is
1545 dnl mapped from a subdirectory of include/ext.
1546 dnl
1547 dnl Default is new.
1548 dnl
1549 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1550 AC_MSG_CHECKING([for std::allocator base class])
1551 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1552 [use KIND for target std::allocator base],
1553 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1555 # If they didn't use this option switch, or if they specified --enable
1556 # with no specific model, we'll have to look for one. If they
1557 # specified --disable (???), do likewise.
1558 if test $enable_libstdcxx_allocator = no ||
1559 test $enable_libstdcxx_allocator = yes;
1560 then
1561 enable_libstdcxx_allocator=auto
1562 fi
1564 # Either a known package, or "auto". Auto implies the default choice
1565 # for a particular platform.
1566 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1568 # Probe for host-specific support if no specific model is specified.
1569 # Default to "new".
1570 if test $enable_libstdcxx_allocator_flag = auto; then
1571 case ${target_os} in
1572 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1573 enable_libstdcxx_allocator_flag=new
1574 ;;
1575 *)
1576 enable_libstdcxx_allocator_flag=new
1577 ;;
1578 esac
1579 fi
1580 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1583 # Set configure bits for specified locale package
1584 case ${enable_libstdcxx_allocator_flag} in
1585 bitmap)
1586 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1587 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1588 ;;
1589 malloc)
1590 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1591 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1592 ;;
1593 mt)
1594 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1595 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1596 ;;
1597 new)
1598 ALLOCATOR_H=config/allocator/new_allocator_base.h
1599 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1600 ;;
1601 pool)
1602 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1603 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1604 ;;
1605 esac
1607 AC_SUBST(ALLOCATOR_H)
1608 AC_SUBST(ALLOCATOR_NAME)
1609 ])
1612 dnl
1613 dnl Check for whether the Boost-derived checks should be turned on.
1614 dnl
1615 dnl --enable-concept-checks turns them on.
1616 dnl --disable-concept-checks leaves them off.
1617 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1618 dnl Where DEFAULT is either `yes' or `no'.
1619 dnl
1620 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1621 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1622 if test $enable_concept_checks = yes; then
1623 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1624 [Define to use concept checking code from the boost libraries.])
1625 fi
1626 ])
1629 dnl
1630 dnl Check for which I/O library to use: stdio, or something specific.
1631 dnl
1632 dnl Default is stdio.
1633 dnl
1634 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1635 AC_MSG_CHECKING([for underlying I/O to use])
1636 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1637 [use target-specific I/O package], [permit stdio])
1639 # Now that libio has been removed, you can have any color you want as long
1640 # as it's black. This is one big no-op until other packages are added, but
1641 # showing the framework never hurts.
1642 case ${enable_cstdio} in
1643 stdio)
1644 CSTDIO_H=config/io/c_io_stdio.h
1645 BASIC_FILE_H=config/io/basic_file_stdio.h
1646 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1647 AC_MSG_RESULT(stdio)
1648 ;;
1649 esac
1651 AC_SUBST(CSTDIO_H)
1652 AC_SUBST(BASIC_FILE_H)
1653 AC_SUBST(BASIC_FILE_CC)
1654 ])
1657 dnl
1658 dnl Check for "unusual" flags to pass to the compiler while building.
1659 dnl
1660 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1661 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1662 dnl --disable-cxx-flags passes nothing.
1663 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1664 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1665 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1666 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1667 dnl If "default flags" is an empty string, the effect is the same
1668 dnl as --disable or --enable=no.
1669 dnl
1670 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1671 AC_MSG_CHECKING([for extra compiler flags for building])
1672 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1673 [pass compiler FLAGS when building library],
1674 [case "x$enable_cxx_flags" in
1675 xno | x) enable_cxx_flags= ;;
1676 x-*) ;;
1677 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1678 esac])
1680 # Run through flags (either default or command-line) and set anything
1681 # extra (e.g., #defines) that must accompany particular g++ options.
1682 if test -n "$enable_cxx_flags"; then
1683 for f in $enable_cxx_flags; do
1684 case "$f" in
1685 -fhonor-std) ;;
1686 -*) ;;
1687 *) # and we're trying to pass /what/ exactly?
1688 AC_MSG_ERROR([compiler flags start with a -]) ;;
1689 esac
1690 done
1691 fi
1693 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1694 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1695 AC_SUBST(EXTRA_CXX_FLAGS)
1696 ])
1699 dnl
1700 dnl Check to see if debugging libraries are to be built.
1701 dnl
1702 dnl --enable-libstdcxx-debug
1703 dnl builds a separate set of debugging libraries in addition to the
1704 dnl normal (shared, static) libstdc++ binaries.
1705 dnl
1706 dnl --disable-libstdcxx-debug
1707 dnl builds only one (non-debug) version of libstdc++.
1708 dnl
1709 dnl --enable-libstdcxx-debug-flags=FLAGS
1710 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1711 dnl
1712 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1713 dnl Where DEFAULT is either `yes' or `no'.
1714 dnl
1715 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1716 AC_MSG_CHECKING([for additional debug build])
1717 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1718 AC_MSG_RESULT($enable_libstdcxx_debug)
1719 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1720 ])
1723 dnl
1724 dnl Check for explicit debug flags.
1725 dnl
1726 dnl --enable-libstdcxx-debug-flags='-O1'
1727 dnl is a general method for passing flags to be used when
1728 dnl building debug libraries with --enable-debug.
1729 dnl
1730 dnl --disable-libstdcxx-debug-flags does nothing.
1731 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1732 dnl If "default flags" is an empty string, the effect is the same
1733 dnl as --disable or --enable=no.
1734 dnl
1735 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1736 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1737 [pass compiler FLAGS when building debug library],
1738 [case "x$enable_libstdcxx_debug_flags" in
1739 xno | x) enable_libstdcxx_debug_flags= ;;
1740 x-*) ;;
1741 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1742 esac])
1744 # Option parsed, now set things appropriately
1745 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1746 AC_SUBST(DEBUG_FLAGS)
1748 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1749 ])
1752 dnl
1753 dnl Check if the user only wants a freestanding library implementation.
1754 dnl
1755 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1756 dnl installing only the headers required by [17.4.1.3] and the language
1757 dnl support library. More than that will be built (to keep the Makefiles
1758 dnl conveniently clean), but not installed.
1759 dnl
1760 dnl Sets:
1761 dnl is_hosted (yes/no)
1762 dnl
1763 dnl Defines:
1764 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1765 dnl
1766 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1767 AC_ARG_ENABLE([hosted-libstdcxx],
1768 AC_HELP_STRING([--disable-hosted-libstdcxx],
1769 [only build freestanding C++ runtime support]),,
1770 [case "$host" in
1771 arm*-*-symbianelf*)
1772 enable_hosted_libstdcxx=no
1773 ;;
1774 *)
1775 enable_hosted_libstdcxx=yes
1776 ;;
1777 esac])
1778 if test "$enable_hosted_libstdcxx" = no; then
1779 AC_MSG_NOTICE([Only freestanding libraries will be built])
1780 is_hosted=no
1781 hosted_define=0
1782 enable_abi_check=no
1783 enable_libstdcxx_pch=no
1784 else
1785 is_hosted=yes
1786 hosted_define=1
1787 fi
1788 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1789 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1790 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1791 ])
1794 dnl
1795 dnl Check for template specializations for the 'long long' type.
1796 dnl The result determines only whether 'long long' I/O is enabled; things
1797 dnl like numeric_limits<> specializations are always available.
1798 dnl
1799 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1800 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1801 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1802 dnl Where DEFAULT is either `yes' or `no'.
1803 dnl
1804 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1805 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1806 if test $enable_long_long = yes; then
1807 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1808 [Define if code specialized for long long should be used.])
1809 fi
1810 AC_MSG_CHECKING([for enabled long long specializations])
1811 AC_MSG_RESULT([$enable_long_long])
1812 ])
1815 dnl
1816 dnl Check for template specializations for the 'wchar_t' type.
1817 dnl
1818 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1819 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1820 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1821 dnl Where DEFAULT is either `yes' or `no'.
1822 dnl
1823 dnl Necessary support must also be present.
1824 dnl
1825 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1826 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1828 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1829 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1830 AC_MSG_CHECKING([for mbstate_t])
1831 AC_TRY_COMPILE([#include <wchar.h>],
1832 [mbstate_t teststate;],
1833 have_mbstate_t=yes, have_mbstate_t=no)
1834 AC_MSG_RESULT($have_mbstate_t)
1835 if test x"$have_mbstate_t" = xyes; then
1836 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1837 fi
1839 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1840 # ac_has_wchar_h.
1841 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1843 if test x"$enable_wchar_t" = x"yes"; then
1845 AC_LANG_SAVE
1846 AC_LANG_CPLUSPLUS
1848 if test x"$ac_has_wchar_h" = xyes &&
1849 test x"$ac_has_wctype_h" = xyes; then
1850 AC_TRY_COMPILE([#include <wchar.h>
1851 #include <stddef.h>
1852 wint_t i;
1853 long l = WEOF;
1854 long j = WCHAR_MIN;
1855 long k = WCHAR_MAX;
1856 namespace test
1857 {
1858 using ::btowc;
1859 using ::fgetwc;
1860 using ::fgetws;
1861 using ::fputwc;
1862 using ::fputws;
1863 using ::fwide;
1864 using ::fwprintf;
1865 using ::fwscanf;
1866 using ::getwc;
1867 using ::getwchar;
1868 using ::mbrlen;
1869 using ::mbrtowc;
1870 using ::mbsinit;
1871 using ::mbsrtowcs;
1872 using ::putwc;
1873 using ::putwchar;
1874 using ::swprintf;
1875 using ::swscanf;
1876 using ::ungetwc;
1877 using ::vfwprintf;
1878 using ::vswprintf;
1879 using ::vwprintf;
1880 using ::wcrtomb;
1881 using ::wcscat;
1882 using ::wcschr;
1883 using ::wcscmp;
1884 using ::wcscoll;
1885 using ::wcscpy;
1886 using ::wcscspn;
1887 using ::wcsftime;
1888 using ::wcslen;
1889 using ::wcsncat;
1890 using ::wcsncmp;
1891 using ::wcsncpy;
1892 using ::wcspbrk;
1893 using ::wcsrchr;
1894 using ::wcsrtombs;
1895 using ::wcsspn;
1896 using ::wcsstr;
1897 using ::wcstod;
1898 using ::wcstok;
1899 using ::wcstol;
1900 using ::wcstoul;
1901 using ::wcsxfrm;
1902 using ::wctob;
1903 using ::wmemchr;
1904 using ::wmemcmp;
1905 using ::wmemcpy;
1906 using ::wmemmove;
1907 using ::wmemset;
1908 using ::wprintf;
1909 using ::wscanf;
1910 }
1911 ],[],[], [enable_wchar_t=no])
1912 else
1913 enable_wchar_t=no
1914 fi
1916 AC_LANG_RESTORE
1917 fi
1919 if test x"$enable_wchar_t" = x"yes"; then
1920 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1921 [Define if code specialized for wchar_t should be used.])
1922 fi
1924 AC_MSG_CHECKING([for enabled wchar_t specializations])
1925 AC_MSG_RESULT([$enable_wchar_t])
1926 ])
1929 dnl
1930 dnl Check to see if building and using a C++ precompiled header can be done.
1931 dnl
1932 dnl --enable-libstdcxx-pch=yes
1933 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1934 dnl may work, after some light-hearted attempts to puzzle out compiler
1935 dnl support, flip bits on in include/Makefile.am
1936 dnl
1937 dnl --disable-libstdcxx-pch
1938 dnl turns off attempts to use or build stdc++.h.gch.
1939 dnl
1940 dnl Substs:
1941 dnl glibcxx_PCHFLAGS
1942 dnl
1943 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1944 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1945 if test $enable_libstdcxx_pch = yes; then
1946 AC_CACHE_CHECK([for compiler with PCH support],
1947 [glibcxx_cv_prog_CXX_pch],
1948 [ac_save_CXXFLAGS="$CXXFLAGS"
1949 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1950 AC_LANG_SAVE
1951 AC_LANG_CPLUSPLUS
1952 echo '#include <math.h>' > conftest.h
1953 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1954 -o conftest.h.gch 1>&5 2>&1 &&
1955 echo '#error "pch failed"' > conftest.h &&
1956 echo '#include "conftest.h"' > conftest.cc &&
1957 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1958 then
1959 glibcxx_cv_prog_CXX_pch=yes
1960 else
1961 glibcxx_cv_prog_CXX_pch=no
1962 fi
1963 rm -f conftest*
1964 CXXFLAGS=$ac_save_CXXFLAGS
1965 AC_LANG_RESTORE
1966 ])
1967 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1968 fi
1970 AC_MSG_CHECKING([for enabled PCH])
1971 AC_MSG_RESULT([$enable_libstdcxx_pch])
1973 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1974 if test $enable_libstdcxx_pch = yes; then
1975 glibcxx_PCHFLAGS="-include bits/stdtr1c++.h"
1976 else
1977 glibcxx_PCHFLAGS=""
1978 fi
1979 AC_SUBST(glibcxx_PCHFLAGS)
1980 ])
1983 dnl
1984 dnl Check for atomic builtins.
1985 dnl See:
1986 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
1987 dnl
1988 dnl This checks to see if the host supports the compiler-generated
1989 dnl builtins for atomic operations. Note, this is intended to be an
1990 dnl all-or-nothing switch, so all the atomic operations that are used
1991 dnl should be checked.
1992 dnl
1993 dnl Note:
1994 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
1995 dnl see: CHECK_SYNC_FETCH_AND_ADD
1996 dnl
1997 dnl Defines:
1998 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
1999 dnl
2000 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2001 AC_MSG_CHECKING([for atomic builtins])
2002 AC_LANG_SAVE
2003 AC_LANG_CPLUSPLUS
2005 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2006 cat > conftest.$ac_ext << EOF
2007 [#]line __oline__ "configure"
2008 int main()
2009 {
2010 // NB: _Atomic_word not necessarily int.
2011 typedef int atomic_type;
2012 atomic_type c1;
2013 atomic_type c2;
2014 const atomic_type c3(0);
2015 if (__sync_fetch_and_add(&c1, c2) == c3)
2016 {
2017 // Do something.
2018 }
2019 return 0;
2020 }
2021 EOF
2022 old_CXXFLAGS="$CXXFLAGS"
2023 CXXFLAGS=-S
2024 if AC_TRY_EVAL(ac_compile); then
2025 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
2026 enable_atomic_builtins=no
2027 else
2028 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2029 [Define if builtin atomic operations are supported on this host.])
2030 enable_atomic_builtins=yes
2031 atomicity_dir=cpu/generic/atomicity_builtins
2032 fi
2033 fi
2034 CXXFLAGS="$old_CXXFLAGS"
2035 rm -f conftest*
2037 # Now, if still generic, set to mutex.
2038 if test $atomicity_dir = "cpu/generic" ; then
2039 atomicity_dir=cpu/generic/atomicity_mutex
2040 fi
2041 AC_LANG_RESTORE
2042 AC_MSG_RESULT($enable_atomic_builtins)
2043 ])
2046 dnl
2047 dnl Check for exception handling support. If an explicit enable/disable
2048 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2049 dnl target may or may not support call frame exceptions.
2050 dnl
2051 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2052 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2053 dnl Neither one forces an attempt at detection.
2054 dnl
2055 dnl Defines:
2056 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2057 dnl
2058 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2059 AC_MSG_CHECKING([for exception model to use])
2060 AC_LANG_SAVE
2061 AC_LANG_CPLUSPLUS
2062 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2063 [force use of builtin_setjmp for exceptions],
2064 [permit yes|no|auto])
2066 if test $enable_sjlj_exceptions = auto; then
2067 # Botheration. Now we've got to detect the exception model. Link tests
2068 # against libgcc.a are problematic since we've not been given proper -L
2069 # bits for single-tree newlib and libgloss.
2070 #
2071 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2072 cat > conftest.$ac_ext << EOF
2073 [#]line __oline__ "configure"
2074 struct S { ~S(); };
2075 void bar();
2076 void foo()
2077 {
2078 S s;
2079 bar();
2080 }
2081 EOF
2082 old_CXXFLAGS="$CXXFLAGS"
2083 CXXFLAGS=-S
2084 if AC_TRY_EVAL(ac_compile); then
2085 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2086 enable_sjlj_exceptions=yes
2087 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2088 enable_sjlj_exceptions=no
2089 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2090 enable_sjlj_exceptions=no
2091 fi
2092 fi
2093 CXXFLAGS="$old_CXXFLAGS"
2094 rm -f conftest*
2095 fi
2097 # This is a tad weird, for hysterical raisins. We have to map
2098 # enable/disable to two different models.
2099 case $enable_sjlj_exceptions in
2100 yes)
2101 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2102 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2103 ac_exception_model_name=sjlj
2104 ;;
2105 no)
2106 ac_exception_model_name="call frame"
2107 ;;
2108 *)
2109 AC_MSG_ERROR([unable to detect exception model])
2110 ;;
2111 esac
2112 AC_LANG_RESTORE
2113 AC_MSG_RESULT($ac_exception_model_name)
2114 ])
2117 dnl
2118 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2119 dnl
2120 dnl --enable-visibility enables attempt to use visibility attributes.
2121 dnl --disable-visibility turns off all use of visibility attributes.
2122 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2123 dnl Where DEFAULT is 'yes'.
2124 dnl
2125 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2126 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2128 if test x$enable_visibility = xyes ; then
2129 dnl all hail libgfortran
2130 dnl Check whether the target supports hidden visibility.
2131 AC_CACHE_CHECK([whether the target supports hidden visibility],
2132 have_attribute_visibility, [
2133 save_CFLAGS="$CFLAGS"
2134 CFLAGS="$CFLAGS -Werror"
2135 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2136 [], have_attribute_visibility=yes,
2137 have_attribute_visibility=no)
2138 CFLAGS="$save_CFLAGS"])
2139 if test $have_attribute_visibility = no; then
2140 enable_visibility=no
2141 fi
2142 fi
2144 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2145 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2146 ])
2149 dnl
2150 dnl Add version tags to symbols in shared library (or not), additionally
2151 dnl marking other symbols as private/local (or not).
2152 dnl
2153 dnl --enable-symvers=style adds a version script to the linker call when
2154 dnl creating the shared library. The choice of version script is
2155 dnl controlled by 'style'.
2156 dnl --disable-symvers does not.
2157 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2158 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2159 dnl choose a default style based on linker characteristics. Passing
2160 dnl 'no' disables versioning.
2161 dnl
2162 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2164 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2165 [enables symbol versioning of the shared library],
2166 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2168 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2169 # don't know enough about $LD to do tricks...
2170 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2172 # Turn a 'yes' into a suitable default.
2173 if test x$enable_symvers = xyes ; then
2174 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2175 enable_symvers=no
2176 else
2177 if test $with_gnu_ld = yes ; then
2178 enable_symvers=gnu
2179 else
2180 case ${target_os} in
2181 darwin*)
2182 enable_symvers=darwin ;;
2183 *)
2184 enable_symvers=no ;;
2185 esac
2186 fi
2187 fi
2188 fi
2190 # Check to see if 'darwin' or 'darwin-export' can win.
2191 if test x$enable_symvers = xdarwin-export ; then
2192 enable_symvers=darwin
2193 fi
2195 # Check to see if 'gnu' can win.
2196 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2197 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2198 AC_MSG_CHECKING([for shared libgcc])
2199 ac_save_CFLAGS="$CFLAGS"
2200 CFLAGS=' -lgcc_s'
2201 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2202 CFLAGS="$ac_save_CFLAGS"
2203 if test $glibcxx_shared_libgcc = no; then
2204 cat > conftest.c <<EOF
2205 int main (void) { return 0; }
2206 EOF
2207 changequote(,)dnl
2208 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2209 -shared -shared-libgcc -o conftest.so \
2210 conftest.c -v 2>&1 >/dev/null \
2211 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2212 changequote([,])dnl
2213 rm -f conftest.c conftest.so
2214 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2215 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2216 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2217 CFLAGS="$ac_save_CFLAGS"
2218 fi
2219 fi
2220 AC_MSG_RESULT($glibcxx_shared_libgcc)
2222 # For GNU ld, we need at least this version. The format is described in
2223 # GLIBCXX_CHECK_LINKER_FEATURES above.
2224 glibcxx_min_gnu_ld_version=21400
2226 # If no shared libgcc, can't win.
2227 if test $glibcxx_shared_libgcc != yes; then
2228 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2229 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2230 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2231 enable_symvers=no
2232 elif test $with_gnu_ld != yes ; then
2233 # just fail for now
2234 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2235 AC_MSG_WARN([=== you are not using the GNU linker.])
2236 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2237 enable_symvers=no
2238 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2239 # The right tools, the right setup, but too old. Fallbacks?
2240 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2241 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2242 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2243 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2244 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2245 enable_symvers=no
2246 fi
2247 fi
2249 # Everything parsed; figure out what file to use.
2250 case $enable_symvers in
2251 no)
2252 SYMVER_FILE=config/abi/pre/none.ver
2253 ;;
2254 gnu)
2255 SYMVER_FILE=config/abi/pre/gnu.ver
2256 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2257 [Define to use GNU versioning in the shared library.])
2258 ;;
2259 gnu-versioned-namespace)
2260 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2261 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2262 [Define to use GNU namespace versioning in the shared library.])
2263 ;;
2264 darwin)
2265 SYMVER_FILE=config/abi/pre/gnu.ver
2266 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2267 [Define to use darwin versioning in the shared library.])
2268 ;;
2269 esac
2271 if test x$enable_symvers != xno ; then
2272 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2273 [Define to use symbol versioning in the shared library.])
2274 fi
2276 AC_SUBST(SYMVER_FILE)
2277 AC_SUBST(port_specific_symbol_files)
2278 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2279 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2280 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2281 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2282 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2284 # Now, set up compatibility support, if any.
2285 # In addition, need this to deal with std::size_t mangling in
2286 # src/compatibility.cc. In a perfect world, could use
2287 # typeid(std::size_t).name()[0] to do direct substitution.
2288 AC_MSG_CHECKING([for size_t as unsigned int])
2289 ac_save_CFLAGS="$CFLAGS"
2290 CFLAGS="-Werror"
2291 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2292 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2293 CFLAGS=$ac_save_CFLAGS
2294 if test "$glibcxx_size_t_is_i" = yes; then
2295 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2296 fi
2297 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2299 AC_MSG_CHECKING([for ptrdiff_t as int])
2300 ac_save_CFLAGS="$CFLAGS"
2301 CFLAGS="-Werror"
2302 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2303 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2304 CFLAGS=$ac_save_CFLAGS
2305 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2306 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2307 fi
2308 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2309 ])
2312 dnl
2313 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2314 dnl We must stage the required headers so that they will be installed
2315 dnl with the library (unlike libgcc, the STL implementation is provided
2316 dnl solely within headers). Since we must not inject random user-space
2317 dnl macro names into user-provided C++ code, we first stage into <file>-in
2318 dnl and process to <file> with an output command. The reason for a two-
2319 dnl stage process here is to correctly handle $srcdir!=$objdir without
2320 dnl having to write complex code (the sed commands to clean the macro
2321 dnl namespace are complex and fragile enough as it is). We must also
2322 dnl add a relative path so that -I- is supported properly.
2323 dnl
2324 dnl Substs:
2325 dnl glibcxx_thread_h
2326 dnl
2327 dnl Defines:
2328 dnl HAVE_GTHR_DEFAULT
2329 dnl
2330 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2331 AC_MSG_CHECKING([for thread model used by GCC])
2332 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2333 AC_MSG_RESULT([$target_thread_file])
2335 if test $target_thread_file != single; then
2336 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2337 [Define if gthr-default.h exists
2338 (meaning that threading support is enabled).])
2339 fi
2341 glibcxx_thread_h=gthr-$target_thread_file.h
2343 dnl Check for __GTHREADS define.
2344 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2345 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2346 enable_thread=yes
2347 else
2348 enable_thread=no
2349 fi
2351 AC_SUBST(glibcxx_thread_h)
2352 ])
2355 # Check whether LC_MESSAGES is available in <locale.h>.
2356 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2357 #
2358 # This file file be copied and used freely without restrictions. It can
2359 # be used in projects which are not available under the GNU Public License
2360 # but which still want to provide support for the GNU gettext functionality.
2361 # Please note that the actual code is *not* freely available.
2363 # serial 1
2364 AC_DEFUN([AC_LC_MESSAGES], [
2365 AC_CHECK_HEADER(locale.h, [
2366 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2367 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2368 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2369 if test $ac_cv_val_LC_MESSAGES = yes; then
2370 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2371 [Define if LC_MESSAGES is available in <locale.h>.])
2372 fi
2373 ])
2374 ])
2376 # Macros from the top-level gcc directory.
2377 m4_include([../config/tls.m4])