| blob | 6b8aeb57f858badd917a1004144ecc53eb9a6ef0 |
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 \(version \)\{0,1\}\(([^)]*) \)\{0,1\}\([0-9.][0-9.]*\).*/\3/'`
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 $glibcxx_gcsections_min_ld ; then
250 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
251 # NB: This flag only works reliably after 2.16.1. Configure tests
252 # for this are difficult, so hard wire a value that should work.
254 ac_test_CFLAGS="${CFLAGS+set}"
255 ac_save_CFLAGS="$CFLAGS"
256 CFLAGS='-Wl,--gc-sections'
258 # Check for -Wl,--gc-sections
259 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
260 AC_TRY_LINK([ int one(void) { return 1; }
261 int two(void) { return 2; }
262 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
263 if test "$ac_gcsections" = "yes"; then
264 rm -f conftest.c
265 touch conftest.c
266 if $CC -c conftest.c; then
267 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
268 grep "Warning: gc-sections option ignored" > /dev/null; then
269 ac_gcsections=no
270 fi
271 fi
272 rm -f conftest.c conftest.o conftest
273 fi
274 if test "$ac_gcsections" = "yes"; then
275 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
276 fi
277 AC_MSG_RESULT($ac_gcsections)
279 if test "$ac_test_CFLAGS" = set; then
280 CFLAGS="$ac_save_CFLAGS"
281 else
282 # this is the suspicious part
283 CFLAGS=''
284 fi
285 fi
287 # Set -z,relro.
288 # Note this is only for shared objects.
289 ac_ld_relro=no
290 if test x"$with_gnu_ld" = x"yes"; then
291 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
292 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
293 if test -n "$cxx_z_relo"; then
294 OPT_LDFLAGS="-Wl,-z,relro"
295 ac_ld_relro=yes
296 fi
297 AC_MSG_RESULT($ac_ld_relro)
298 fi
300 # Set linker optimization flags.
301 if test x"$with_gnu_ld" = x"yes"; then
302 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
303 fi
305 AC_SUBST(SECTION_LDFLAGS)
306 AC_SUBST(OPT_LDFLAGS)
307 ])
310 dnl
311 dnl Check to see if this target can enable the iconv specializations.
312 dnl If --disable-c-mbchar was given, no wchar_t specialization is enabled.
313 dnl (This must have been previously checked, along with the rest of C99
314 dnl support.) By default, iconv support is disabled.
315 dnl
316 dnl Defines:
317 dnl _GLIBCXX_USE_ICONV if all the bits are found.
318 dnl Substs:
319 dnl LIBICONV to a -l string containing the iconv library, if needed.
320 dnl
321 AC_DEFUN([GLIBCXX_CHECK_ICONV_SUPPORT], [
323 enable_iconv=no
324 # Only continue checking if the ISO C99 headers exist and support is on.
325 if test x"$enable_wchar_t" = xyes; then
327 # Use iconv for wchar_t to char conversions. As such, check for
328 # X/Open Portability Guide, version 2 features (XPG2).
329 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
330 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
332 # Check for existence of libiconv.a providing XPG2 wchar_t support.
333 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
334 ac_save_LIBS="$LIBS"
335 LIBS="$LIBS $LIBICONV"
336 AC_SUBST(LIBICONV)
338 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
339 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
341 LIBS="$ac_save_LIBS"
343 if test x"$ac_has_iconv_h" = xyes &&
344 test x"$ac_has_langinfo_h" = xyes &&
345 test x"$ac_XPG2funcs" = xyes;
346 then
347 AC_DEFINE([_GLIBCXX_USE_ICONV],1,
348 [Define if iconv and related functions exist and are usable.])
349 enable_iconv=yes
350 fi
351 fi
352 AC_MSG_CHECKING([for enabled iconv specializations])
353 AC_MSG_RESULT($enable_iconv)
354 ])
357 dnl
358 dnl Check for headers for, and arguments to, the setrlimit() function.
359 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
360 dnl
361 dnl Defines:
362 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
363 dnl various HAVE_LIMIT_* for individual limit names
364 dnl
365 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
366 AC_MSG_CHECKING([for RLIMIT_$1])
367 AC_TRY_COMPILE(
368 [#include <unistd.h>
369 #include <sys/time.h>
370 #include <sys/resource.h>
371 ],
372 [ int f = RLIMIT_$1 ; ],
373 [glibcxx_mresult=1], [glibcxx_mresult=0])
374 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
375 [Only used in build directory testsuite_hooks.h.])
376 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
377 AC_MSG_RESULT($res)
378 ])
380 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
381 setrlimit_have_headers=yes
382 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
383 [],
384 [setrlimit_have_headers=no])
385 # If don't have the headers, then we can't run the tests now, and we
386 # won't be seeing any of these during testsuite compilation.
387 if test $setrlimit_have_headers = yes; then
388 # Can't do these in a loop, else the resulting syntax is wrong.
389 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
390 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
391 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
392 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
393 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
395 # Check for rlimit, setrlimit.
396 AC_CACHE_VAL(ac_setrlimit, [
397 AC_TRY_COMPILE(
398 [#include <unistd.h>
399 #include <sys/time.h>
400 #include <sys/resource.h>
401 ],
402 [struct rlimit r;
403 setrlimit(0, &r);],
404 [ac_setrlimit=yes], [ac_setrlimit=no])
405 ])
406 fi
408 AC_MSG_CHECKING([for testsuite resource limits support])
409 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
410 ac_res_limits=yes
411 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
412 [Define if using setrlimit to set resource limits during
413 "make check"])
414 else
415 ac_res_limits=no
416 fi
417 AC_MSG_RESULT($ac_res_limits)
418 ])
421 dnl
422 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
423 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
424 dnl
425 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
426 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
427 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
428 AC_TRY_LINK(
429 [#include <sys/stat.h>],
430 [struct stat buffer;
431 fstat(0, &buffer);
432 S_ISREG(buffer.st_mode);],
433 [glibcxx_cv_S_ISREG=yes],
434 [glibcxx_cv_S_ISREG=no])
435 ])
436 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
437 AC_TRY_LINK(
438 [#include <sys/stat.h>],
439 [struct stat buffer;
440 fstat(0, &buffer);
441 S_IFREG & buffer.st_mode;],
442 [glibcxx_cv_S_IFREG=yes],
443 [glibcxx_cv_S_IFREG=no])
444 ])
445 res=no
446 if test $glibcxx_cv_S_ISREG = yes; then
447 AC_DEFINE(HAVE_S_ISREG, 1,
448 [Define if S_IFREG is available in <sys/stat.h>.])
449 res=S_ISREG
450 elif test $glibcxx_cv_S_IFREG = yes; then
451 AC_DEFINE(HAVE_S_IFREG, 1,
452 [Define if S_IFREG is available in <sys/stat.h>.])
453 res=S_IFREG
454 fi
455 AC_MSG_RESULT($res)
456 ])
459 dnl
460 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
461 dnl
462 AC_DEFUN([GLIBCXX_CHECK_POLL], [
463 AC_MSG_CHECKING([for poll])
464 AC_CACHE_VAL(glibcxx_cv_POLL, [
465 AC_TRY_LINK(
466 [#include <poll.h>],
467 [struct pollfd pfd[1];
468 pfd[0].events = POLLIN;
469 poll(pfd, 1, 0);],
470 [glibcxx_cv_POLL=yes],
471 [glibcxx_cv_POLL=no])
472 ])
473 if test $glibcxx_cv_POLL = yes; then
474 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
475 fi
476 AC_MSG_RESULT($glibcxx_cv_POLL)
477 ])
480 dnl
481 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
482 dnl
483 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
484 AC_MSG_CHECKING([for writev])
485 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
486 AC_TRY_LINK(
487 [#include <sys/uio.h>],
488 [struct iovec iov[2];
489 writev(0, iov, 0);],
490 [glibcxx_cv_WRITEV=yes],
491 [glibcxx_cv_WRITEV=no])
492 ])
493 if test $glibcxx_cv_WRITEV = yes; then
494 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
495 fi
496 AC_MSG_RESULT($glibcxx_cv_WRITEV)
497 ])
500 dnl
501 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
502 dnl
503 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
504 AC_MSG_CHECKING([for int64_t])
505 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
506 AC_TRY_COMPILE(
507 [#include <stdint.h>],
508 [int64_t var;],
509 [glibcxx_cv_INT64_T=yes],
510 [glibcxx_cv_INT64_T=no])
511 ])
512 if test $glibcxx_cv_INT64_T = yes; then
513 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
514 fi
515 AC_MSG_RESULT($glibcxx_cv_INT64_T)
516 ])
519 dnl
520 dnl Check whether LFS support is available.
521 dnl
522 AC_DEFUN([GLIBCXX_CHECK_LFS], [
523 AC_LANG_SAVE
524 AC_LANG_CPLUSPLUS
525 ac_save_CXXFLAGS="$CXXFLAGS"
526 CXXFLAGS="$CXXFLAGS -fno-exceptions"
527 AC_MSG_CHECKING([for LFS support])
528 AC_CACHE_VAL(glibcxx_cv_LFS, [
529 AC_TRY_LINK(
530 [#include <unistd.h>
531 #include <stdio.h>
532 #include <sys/stat.h>
533 ],
534 [FILE* fp;
535 fopen64("t", "w");
536 fseeko64(fp, 0, SEEK_CUR);
537 ftello64(fp);
538 lseek64(1, 0, SEEK_CUR);
539 struct stat64 buf;
540 fstat64(1, &buf);],
541 [glibcxx_cv_LFS=yes],
542 [glibcxx_cv_LFS=no])
543 ])
544 if test $glibcxx_cv_LFS = yes; then
545 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
546 fi
547 AC_MSG_RESULT($glibcxx_cv_LFS)
548 CXXFLAGS="$ac_save_CXXFLAGS"
549 AC_LANG_RESTORE
550 ])
553 dnl
554 dnl Check for whether a fully dynamic basic_string implementation should
555 dnl be turned on, that does not put empty objects in per-process static
556 dnl memory (mostly useful together with shared memory allocators, see PR
557 dnl libstdc++/16612 for details).
558 dnl
559 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
560 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
561 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
562 dnl Where DEFAULT is either `yes' or `no'.
563 dnl
564 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
565 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
566 if test $enable_fully_dynamic_string = yes; then
567 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
568 [Define if a fully dynamic basic_string is wanted.])
569 fi
570 ])
573 dnl
574 dnl Does any necessary configuration of the testsuite directory. Generates
575 dnl the testsuite_hooks.h header.
576 dnl
577 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
578 dnl
579 dnl Sets:
580 dnl enable_abi_check
581 dnl GLIBCXX_TEST_WCHAR_T
582 dnl GLIBCXX_TEST_THREAD
583 dnl Substs:
584 dnl baseline_dir
585 dnl
586 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
587 if $GLIBCXX_IS_NATIVE ; then
588 # Do checks for resource limit functions.
589 GLIBCXX_CHECK_SETRLIMIT
591 # Look for setenv, so that extended locale tests can be performed.
592 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
593 fi
595 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
596 test $enable_symvers != no; then
597 case "$host" in
598 *-*-cygwin*)
599 enable_abi_check=no ;;
600 *)
601 enable_abi_check=yes ;;
602 esac
603 else
604 # Only build this as native, since automake does not understand
605 # CXX_FOR_BUILD.
606 enable_abi_check=no
607 fi
609 # Export file names for ABI checking.
610 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
611 AC_SUBST(baseline_dir)
612 ])
615 dnl
616 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
617 dnl
618 dnl Substs:
619 dnl GLIBCXX_INCLUDES
620 dnl TOPLEVEL_INCLUDES
621 dnl
622 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
623 # Used for every C++ compile we perform.
624 GLIBCXX_INCLUDES="\
625 -I$glibcxx_builddir/include/$host_alias \
626 -I$glibcxx_builddir/include \
627 -I$glibcxx_srcdir/libsupc++"
629 # For Canadian crosses, pick this up too.
630 if test $CANADIAN = yes; then
631 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
632 fi
634 # Stuff in the actual top level. Currently only used by libsupc++ to
635 # get unwind* headers from the gcc dir.
636 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
637 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
639 # Now, export this to all the little Makefiles....
640 AC_SUBST(GLIBCXX_INCLUDES)
641 AC_SUBST(TOPLEVEL_INCLUDES)
642 ])
645 dnl
646 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
647 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
648 dnl
649 dnl Substs:
650 dnl OPTIMIZE_CXXFLAGS
651 dnl WARN_FLAGS
652 dnl
653 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
654 # Optimization flags that are probably a good idea for thrill-seekers. Just
655 # uncomment the lines below and make, everything else is ready to go...
656 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
657 OPTIMIZE_CXXFLAGS=
658 AC_SUBST(OPTIMIZE_CXXFLAGS)
660 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
661 AC_SUBST(WARN_FLAGS)
662 ])
665 dnl
666 dnl All installation directory information is determined here.
667 dnl
668 dnl Substs:
669 dnl gxx_install_dir
670 dnl glibcxx_prefixdir
671 dnl glibcxx_toolexecdir
672 dnl glibcxx_toolexeclibdir
673 dnl
674 dnl Assumes cross_compiling bits already done, and with_cross_host in
675 dnl particular.
676 dnl
677 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
678 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
679 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
680 glibcxx_toolexecdir=no
681 glibcxx_toolexeclibdir=no
682 glibcxx_prefixdir=$prefix
684 AC_MSG_CHECKING([for gxx-include-dir])
685 AC_ARG_WITH([gxx-include-dir],
686 AC_HELP_STRING([--with-gxx-include-dir=DIR],
687 [installation directory for include files]),
688 [case "$withval" in
689 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
690 no) gxx_include_dir=no ;;
691 *) gxx_include_dir=$withval ;;
692 esac],
693 [gxx_include_dir=no])
694 AC_MSG_RESULT($gxx_include_dir)
696 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
697 AC_ARG_ENABLE([version-specific-runtime-libs],
698 AC_HELP_STRING([--enable-version-specific-runtime-libs],
699 [Specify that runtime libraries should be installed in a compiler-specific directory]),
700 [case "$enableval" in
701 yes) version_specific_libs=yes ;;
702 no) version_specific_libs=no ;;
703 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
704 esac],
705 [version_specific_libs=no])
706 AC_MSG_RESULT($version_specific_libs)
708 # Default case for install directory for include files.
709 if test $version_specific_libs = no && test $gxx_include_dir = no; then
710 gxx_include_dir='include/c++/${gcc_version}'
711 if test -n "$with_cross_host" &&
712 test x"$with_cross_host" != x"no"; then
713 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
714 else
715 gxx_include_dir='${prefix}/'"$gxx_include_dir"
716 fi
717 fi
719 # Version-specific runtime libs processing.
720 if test $version_specific_libs = yes; then
721 # Need the gcc compiler version to know where to install libraries
722 # and header files if --enable-version-specific-runtime-libs option
723 # is selected. FIXME: these variables are misnamed, there are
724 # no executables installed in _toolexecdir or _toolexeclibdir.
725 if test x"$gxx_include_dir" = x"no"; then
726 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
727 fi
728 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
729 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
730 fi
732 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
733 # Install a library built with a cross compiler in tooldir, not libdir.
734 if test x"$glibcxx_toolexecdir" = x"no"; then
735 if test -n "$with_cross_host" &&
736 test x"$with_cross_host" != x"no"; then
737 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
738 glibcxx_toolexeclibdir='${toolexecdir}/lib'
739 else
740 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
741 glibcxx_toolexeclibdir='${libdir}'
742 fi
743 multi_os_directory=`$CXX -print-multi-os-directory`
744 case $multi_os_directory in
745 .) ;; # Avoid trailing /.
746 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
747 esac
748 fi
750 AC_MSG_CHECKING([for install location])
751 AC_MSG_RESULT($gxx_include_dir)
753 AC_SUBST(glibcxx_prefixdir)
754 AC_SUBST(gxx_include_dir)
755 AC_SUBST(glibcxx_toolexecdir)
756 AC_SUBST(glibcxx_toolexeclibdir)
757 ])
760 dnl
761 dnl GLIBCXX_ENABLE
762 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
763 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
764 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
765 dnl
766 dnl See docs/html/17_intro/configury.html#enable for documentation.
767 dnl
768 m4_define([GLIBCXX_ENABLE],[dnl
769 m4_define([_g_switch],[--enable-$1])dnl
770 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
771 AC_ARG_ENABLE($1,_g_help,
772 m4_bmatch([$5],
773 [^permit ],
774 [[
775 case "$enableval" in
776 m4_bpatsubst([$5],[permit ])) ;;
777 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
778 dnl Idea for future: generate a URL pointing to
779 dnl "onlinedocs/configopts.html#whatever"
780 esac
781 ]],
782 [^$],
783 [[
784 case "$enableval" in
785 yes|no) ;;
786 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
787 esac
788 ]],
789 [[$5]]),
790 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
791 m4_undefine([_g_switch])dnl
792 m4_undefine([_g_help])dnl
793 ])
796 dnl
797 dnl Check for ISO/IEC 9899:1999 "C99" support.
798 dnl
799 dnl --enable-c99 defines _GLIBCXX_USE_C99
800 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
801 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
802 dnl Where DEFAULT is either `yes' or `no'.
803 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
804 dnl
805 AC_DEFUN([GLIBCXX_ENABLE_C99], [
806 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
808 if test x"$enable_c99" = x"yes"; then
810 AC_LANG_SAVE
811 AC_LANG_CPLUSPLUS
813 # Check for the existence of <math.h> functions used if C99 is enabled.
814 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
815 AC_CACHE_VAL(ac_c99_math, [
816 AC_TRY_COMPILE([#include <math.h>],
817 [fpclassify(0.0);
818 isfinite(0.0);
819 isinf(0.0);
820 isnan(0.0);
821 isnormal(0.0);
822 signbit(0.0);
823 isgreater(0.0,0.0);
824 isgreaterequal(0.0,0.0);
825 isless(0.0,0.0);
826 islessequal(0.0,0.0);
827 islessgreater(0.0,0.0);
828 islessgreater(0.0,0.0);
829 isunordered(0.0,0.0);
830 ],[ac_c99_math=yes], [ac_c99_math=no])
831 ])
832 AC_MSG_RESULT($ac_c99_math)
833 if test x"$ac_c99_math" = x"yes"; then
834 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
835 [Define if C99 functions or macros in <math.h> should be imported
836 in <cmath> in namespace std.])
837 fi
839 # Check for the existence of <complex.h> complex math functions.
840 # This is necessary even though libstdc++ uses the builtin versions
841 # of these functions, because if the builtin cannot be used, a reference
842 # to the library function is emitted.
843 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
844 ac_c99_complex=no;
845 if test x"$ac_has_complex_h" = x"yes"; then
846 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
847 AC_TRY_COMPILE([#include <complex.h>],
848 [typedef __complex__ float float_type; float_type tmpf;
849 cabsf(tmpf);
850 cargf(tmpf);
851 ccosf(tmpf);
852 ccoshf(tmpf);
853 cexpf(tmpf);
854 clogf(tmpf);
855 csinf(tmpf);
856 csinhf(tmpf);
857 csqrtf(tmpf);
858 ctanf(tmpf);
859 ctanhf(tmpf);
860 cpowf(tmpf, tmpf);
861 typedef __complex__ double double_type; double_type tmpd;
862 cabs(tmpd);
863 carg(tmpd);
864 ccos(tmpd);
865 ccosh(tmpd);
866 cexp(tmpd);
867 clog(tmpd);
868 csin(tmpd);
869 csinh(tmpd);
870 csqrt(tmpd);
871 ctan(tmpd);
872 ctanh(tmpd);
873 cpow(tmpd, tmpd);
874 typedef __complex__ long double ld_type; ld_type tmpld;
875 cabsl(tmpld);
876 cargl(tmpld);
877 ccosl(tmpld);
878 ccoshl(tmpld);
879 cexpl(tmpld);
880 clogl(tmpld);
881 csinl(tmpld);
882 csinhl(tmpld);
883 csqrtl(tmpld);
884 ctanl(tmpld);
885 ctanhl(tmpld);
886 cpowl(tmpld, tmpld);
887 ],[ac_c99_complex=yes], [ac_c99_complex=no])
888 fi
889 AC_MSG_RESULT($ac_c99_complex)
890 if test x"$ac_c99_complex" = x"yes"; then
891 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
892 [Define if C99 functions in <complex.h> should be used in
893 <complex>. Using compiler builtins for these functions requires
894 corresponding C99 library functions to be present.])
895 fi
897 # Check for the existence in <stdio.h> of vscanf, et. al.
898 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
899 AC_CACHE_VAL(ac_c99_stdio, [
900 AC_TRY_COMPILE([#include <stdio.h>
901 #include <stdarg.h>
902 void foo(char* fmt, ...)
903 {
904 va_list args; va_start(args, fmt);
905 vfscanf(stderr, "%i", args);
906 vscanf("%i", args);
907 vsnprintf(fmt, 0, "%i", args);
908 vsscanf(fmt, "%i", args);
909 }],
910 [snprintf("12", 0, "%i");],
911 [ac_c99_stdio=yes], [ac_c99_stdio=no])
912 ])
913 AC_MSG_RESULT($ac_c99_stdio)
915 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
916 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
917 AC_CACHE_VAL(ac_c99_stdlib, [
918 AC_TRY_COMPILE([#include <stdlib.h>],
919 [char* tmp;
920 strtof("gnu", &tmp);
921 strtold("gnu", &tmp);
922 strtoll("gnu", &tmp, 10);
923 strtoull("gnu", &tmp, 10);
924 llabs(10);
925 lldiv(10,1);
926 atoll("10");
927 _Exit(0);
928 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
929 ])
930 AC_MSG_RESULT($ac_c99_stdlib)
932 # Check for the existence in <wchar.h> of wcstold, etc.
933 ac_c99_wchar=no;
934 if test x"$ac_has_wchar_h" = xyes &&
935 test x"$ac_has_wctype_h" = xyes; then
936 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
937 AC_TRY_COMPILE([#include <wchar.h>
938 namespace test
939 {
940 using ::wcstold;
941 using ::wcstoll;
942 using ::wcstoull;
943 }
944 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
946 # Checks for wide character functions that may not be present.
947 # Injection of these is wrapped with guard macros.
948 # NB: only put functions here, instead of immediately above, if
949 # absolutely necessary.
950 AC_TRY_COMPILE([#include <wchar.h>
951 namespace test { using ::vfwscanf; } ], [],
952 [AC_DEFINE(HAVE_VFWSCANF,1,
953 [Defined if vfwscanf exists.])],[])
955 AC_TRY_COMPILE([#include <wchar.h>
956 namespace test { using ::vswscanf; } ], [],
957 [AC_DEFINE(HAVE_VSWSCANF,1,
958 [Defined if vswscanf exists.])],[])
960 AC_TRY_COMPILE([#include <wchar.h>
961 namespace test { using ::vwscanf; } ], [],
962 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
964 AC_TRY_COMPILE([#include <wchar.h>
965 namespace test { using ::wcstof; } ], [],
966 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
968 AC_TRY_COMPILE([#include <wctype.h>],
969 [ wint_t t; int i = iswblank(t);],
970 [AC_DEFINE(HAVE_ISWBLANK,1,
971 [Defined if iswblank exists.])],[])
973 AC_MSG_RESULT($ac_c99_wchar)
974 fi
976 # Option parsed, now set things appropriately.
977 if test x"$ac_c99_math" = x"no" ||
978 test x"$ac_c99_complex" = x"no" ||
979 test x"$ac_c99_stdio" = x"no" ||
980 test x"$ac_c99_stdlib" = x"no" ||
981 test x"$ac_c99_wchar" = x"no"; then
982 enable_c99=no;
983 else
984 AC_DEFINE(_GLIBCXX_USE_C99, 1,
985 [Define if C99 functions or macros from <wchar.h>, <math.h>,
986 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
987 fi
989 AC_LANG_RESTORE
990 fi
992 AC_MSG_CHECKING([for fully enabled ISO C99 support])
993 AC_MSG_RESULT($enable_c99)
994 ])
997 dnl
998 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
999 dnl facilities in Chapter 8, "C compatibility".
1000 dnl
1001 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1003 AC_LANG_SAVE
1004 AC_LANG_CPLUSPLUS
1006 # Check for the existence of <complex.h> complex math functions used
1007 # by tr1/complex.
1008 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1009 ac_c99_complex_tr1=no;
1010 if test x"$ac_has_complex_h" = x"yes"; then
1011 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1012 AC_TRY_COMPILE([#include <complex.h>],
1013 [typedef __complex__ float float_type; float_type tmpf;
1014 cacosf(tmpf);
1015 casinf(tmpf);
1016 catanf(tmpf);
1017 cacoshf(tmpf);
1018 casinhf(tmpf);
1019 catanhf(tmpf);
1020 typedef __complex__ double double_type; double_type tmpd;
1021 cacos(tmpd);
1022 casin(tmpd);
1023 catan(tmpd);
1024 cacosh(tmpd);
1025 casinh(tmpd);
1026 catanh(tmpd);
1027 typedef __complex__ long double ld_type; ld_type tmpld;
1028 cacosl(tmpld);
1029 casinl(tmpld);
1030 catanl(tmpld);
1031 cacoshl(tmpld);
1032 casinhl(tmpld);
1033 catanhl(tmpld);
1034 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1035 fi
1036 AC_MSG_RESULT($ac_c99_complex_tr1)
1037 if test x"$ac_c99_complex_tr1" = x"yes"; then
1038 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
1039 [Define if C99 functions in <complex.h> should be used in
1040 <tr1/complex>. Using compiler builtins for these functions
1041 requires corresponding C99 library functions to be present.])
1042 fi
1044 # Check for the existence of <ctype.h> functions.
1045 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1046 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1047 AC_TRY_COMPILE([#include <ctype.h>],
1048 [int ch;
1049 int ret;
1050 ret = isblank(ch);
1051 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1052 ])
1053 AC_MSG_RESULT($ac_c99_ctype_tr1)
1054 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1055 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1056 [Define if C99 functions in <ctype.h> should be imported in
1057 <tr1/cctype> in namespace std::tr1.])
1058 fi
1060 # Check for the existence of <fenv.h> functions.
1061 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1062 ac_c99_fenv_tr1=no;
1063 if test x"$ac_has_fenv_h" = x"yes"; then
1064 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1065 AC_TRY_COMPILE([#include <fenv.h>],
1066 [int except, mode;
1067 fexcept_t* pflag;
1068 fenv_t* penv;
1069 int ret;
1070 ret = feclearexcept(except);
1071 ret = fegetexceptflag(pflag, except);
1072 ret = feraiseexcept(except);
1073 ret = fesetexceptflag(pflag, except);
1074 ret = fetestexcept(except);
1075 ret = fegetround();
1076 ret = fesetround(mode);
1077 ret = fegetenv(penv);
1078 ret = feholdexcept(penv);
1079 ret = fesetenv(penv);
1080 ret = feupdateenv(penv);
1081 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1082 fi
1083 AC_MSG_RESULT($ac_c99_fenv_tr1)
1084 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1085 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1086 [Define if C99 functions in <fenv.h> should be imported in
1087 <tr1/cfenv> in namespace std::tr1.])
1088 fi
1090 # Check for the existence of <stdint.h> types.
1091 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1092 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1093 AC_TRY_COMPILE([#include <stdint.h>],
1094 [typedef int8_t my_int8_t;
1095 typedef int16_t my_int16_t;
1096 typedef int32_t my_int32_t;
1097 typedef int64_t my_int64_t;
1098 typedef int_fast8_t my_int_fast8_t;
1099 typedef int_fast16_t my_int_fast16_t;
1100 typedef int_fast32_t my_int_fast32_t;
1101 typedef int_fast64_t my_int_fast64_t;
1102 typedef int_least8_t my_int_least8_t;
1103 typedef int_least16_t my_int_least16_t;
1104 typedef int_least32_t my_int_least32_t;
1105 typedef int_least64_t my_int_least64_t;
1106 typedef intmax_t my_intmax_t;
1107 typedef intptr_t my_intptr_t;
1108 typedef uint8_t my_uint8_t;
1109 typedef uint16_t my_uint16_t;
1110 typedef uint32_t my_uint32_t;
1111 typedef uint64_t my_uint64_t;
1112 typedef uint_fast8_t my_uint_fast8_t;
1113 typedef uint_fast16_t my_uint_fast16_t;
1114 typedef uint_fast32_t my_uint_fast32_t;
1115 typedef uint_fast64_t my_uint_fast64_t;
1116 typedef uint_least8_t my_uint_least8_t;
1117 typedef uint_least16_t my_uint_least16_t;
1118 typedef uint_least32_t my_uint_least32_t;
1119 typedef uint_least64_t my_uint_least64_t;
1120 typedef uintmax_t my_uintmax_t;
1121 typedef uintptr_t my_uintptr_t;
1122 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1123 ])
1124 AC_MSG_RESULT($ac_c99_stdint_tr1)
1125 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1126 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1127 [Define if C99 types in <stdint.h> should be imported in
1128 <tr1/cstdint> in namespace std::tr1.])
1129 fi
1131 # Check for the existence of <math.h> functions.
1132 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1133 AC_CACHE_VAL(ac_c99_math_tr1, [
1134 AC_TRY_COMPILE([#include <math.h>],
1135 [typedef double_t my_double_t;
1136 typedef float_t my_float_t;
1137 acosh(0.0);
1138 acoshf(0.0f);
1139 acoshl(0.0l);
1140 asinh(0.0);
1141 asinhf(0.0f);
1142 asinhl(0.0l);
1143 atanh(0.0);
1144 atanhf(0.0f);
1145 atanhl(0.0l);
1146 cbrt(0.0);
1147 cbrtf(0.0f);
1148 cbrtl(0.0l);
1149 copysign(0.0, 0.0);
1150 copysignf(0.0f, 0.0f);
1151 copysignl(0.0l, 0.0l);
1152 erf(0.0);
1153 erff(0.0f);
1154 erfl(0.0l);
1155 erfc(0.0);
1156 erfcf(0.0f);
1157 erfcl(0.0l);
1158 exp2(0.0);
1159 exp2f(0.0f);
1160 exp2l(0.0l);
1161 expm1(0.0);
1162 expm1f(0.0f);
1163 expm1l(0.0l);
1164 fdim(0.0, 0.0);
1165 fdimf(0.0f, 0.0f);
1166 fdiml(0.0l, 0.0l);
1167 fma(0.0, 0.0, 0.0);
1168 fmaf(0.0f, 0.0f, 0.0f);
1169 fmal(0.0l, 0.0l, 0.0l);
1170 fmax(0.0, 0.0);
1171 fmaxf(0.0f, 0.0f);
1172 fmaxl(0.0l, 0.0l);
1173 fmin(0.0, 0.0);
1174 fminf(0.0f, 0.0f);
1175 fminl(0.0l, 0.0l);
1176 hypot(0.0, 0.0);
1177 hypotf(0.0f, 0.0f);
1178 hypotl(0.0l, 0.0l);
1179 ilogb(0.0);
1180 ilogbf(0.0f);
1181 ilogbl(0.0l);
1182 lgamma(0.0);
1183 lgammaf(0.0f);
1184 lgammal(0.0l);
1185 llrint(0.0);
1186 llrintf(0.0f);
1187 llrintl(0.0l);
1188 llround(0.0);
1189 llroundf(0.0f);
1190 llroundl(0.0l);
1191 log1p(0.0);
1192 log1pf(0.0f);
1193 log1pl(0.0l);
1194 log2(0.0);
1195 log2f(0.0f);
1196 log2l(0.0l);
1197 logb(0.0);
1198 logbf(0.0f);
1199 logbl(0.0l);
1200 lrint(0.0);
1201 lrintf(0.0f);
1202 lrintl(0.0l);
1203 lround(0.0);
1204 lroundf(0.0f);
1205 lroundl(0.0l);
1206 nan(0);
1207 nanf(0);
1208 nanl(0);
1209 nearbyint(0.0);
1210 nearbyintf(0.0f);
1211 nearbyintl(0.0l);
1212 nextafter(0.0, 0.0);
1213 nextafterf(0.0f, 0.0f);
1214 nextafterl(0.0l, 0.0l);
1215 nexttoward(0.0, 0.0);
1216 nexttowardf(0.0f, 0.0f);
1217 nexttowardl(0.0l, 0.0l);
1218 remainder(0.0, 0.0);
1219 remainderf(0.0f, 0.0f);
1220 remainderl(0.0l, 0.0l);
1221 remquo(0.0, 0.0, 0);
1222 remquo(0.0f, 0.0f, 0);
1223 remquo(0.0l, 0.0l, 0);
1224 rint(0.0);
1225 rintf(0.0f);
1226 rintl(0.0l);
1227 round(0.0);
1228 roundf(0.0f);
1229 roundl(0.0l);
1230 scalbln(0.0, 0l);
1231 scalblnf(0.0f, 0l);
1232 scalblnl(0.0l, 0l);
1233 scalbn(0.0, 0);
1234 scalbnf(0.0f, 0);
1235 scalbnl(0.0l, 0);
1236 tgamma(0.0);
1237 tgammaf(0.0f);
1238 tgammal(0.0l);
1239 trunc(0.0);
1240 truncf(0.0f);
1241 truncl(0.0l);
1242 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1243 ])
1244 AC_MSG_RESULT($ac_c99_math_tr1)
1245 if test x"$ac_c99_math_tr1" = x"yes"; then
1246 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1247 [Define if C99 functions or macros in <math.h> should be imported
1248 in <tr1/cmath> in namespace std::tr1.])
1249 fi
1251 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1252 # sense if the previous check fails, per C99, 7.8/1).
1253 ac_c99_inttypes_tr1=no;
1254 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1255 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1256 AC_TRY_COMPILE([#include <inttypes.h>],
1257 [intmax_t i, numer, denom, base;
1258 const char* s;
1259 char** endptr;
1260 intmax_t ret = imaxabs(i);
1261 imaxdiv_t dret = imaxdiv(numer, denom);
1262 ret = strtoimax(s, endptr, base);
1263 uintmax_t uret = strtoumax(s, endptr, base);
1264 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1265 fi
1266 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1267 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1268 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1269 [Define if C99 functions in <inttypes.h> should be imported in
1270 <tr1/cinttypes> in namespace std::tr1.])
1271 fi
1273 # Check for the existence of the <stdbool.h> header.
1274 AC_CHECK_HEADERS(stdbool.h)
1276 AC_LANG_RESTORE
1277 ])
1279 dnl
1280 dnl Check whether "dev/random" and "dev/urandom" are available for the
1281 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1282 dnl
1283 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1285 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1286 AC_CACHE_VAL(ac_random_tr1, [
1287 AC_TRY_RUN([#include <stdio.h>
1288 int main()
1289 {
1290 return !(fopen("/dev/random", "r")
1291 && fopen("/dev/urandom", "r"));
1292 }
1293 ],
1294 [ac_random_tr1=yes], [ac_random_tr1=no],
1295 [ac_random_tr1=no])
1296 ])
1297 AC_MSG_RESULT($ac_random_tr1)
1298 if test x"$ac_random_tr1" = x"yes"; then
1299 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1300 [Define if dev/random and dev/urandom are available for
1301 the random_device of TR1 (Chapter 5.1).])
1302 fi
1304 ])
1306 dnl
1307 dnl Check for what type of C headers to use.
1308 dnl
1309 dnl --enable-cheaders= [does stuff].
1310 dnl --disable-cheaders [does not do anything, really].
1311 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1312 dnl Where DEFAULT is either `c' or `c_std'.
1313 dnl
1314 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1315 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1316 [construct "C" headers for g++], [permit c|c_std])
1317 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1319 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1321 AC_SUBST(C_INCLUDE_DIR)
1322 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1323 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1324 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1325 ])
1328 dnl
1329 dnl Check for which locale library to use. The choice is mapped to
1330 dnl a subdirectory of config/locale.
1331 dnl
1332 dnl Default is generic.
1333 dnl
1334 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1335 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1336 [use MODEL for target locale package],
1337 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1339 # Deal with gettext issues. Default to not using it (=no) until we detect
1340 # support for it later. Let the user turn it off via --e/d, but let that
1341 # default to on for easier handling.
1342 USE_NLS=no
1343 AC_ARG_ENABLE(nls,
1344 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1345 [],
1346 [enable_nls=yes])
1348 # Either a known packaage, or "auto"
1349 if test $enable_clocale = no || test $enable_clocale = yes; then
1350 enable_clocale=auto
1351 fi
1352 enable_clocale_flag=$enable_clocale
1354 # Probe for locale model to use if none specified.
1355 # Default to "generic".
1356 if test $enable_clocale_flag = auto; then
1357 case ${target_os} in
1358 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1359 enable_clocale_flag=gnu
1360 ;;
1361 darwin* | freebsd*)
1362 enable_clocale_flag=darwin
1363 ;;
1364 *)
1365 enable_clocale_flag=generic
1366 ;;
1367 esac
1368 fi
1370 # Sanity check model, and test for special functionality.
1371 if test $enable_clocale_flag = gnu; then
1372 AC_EGREP_CPP([_GLIBCXX_ok], [
1373 #include <features.h>
1374 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1375 _GLIBCXX_ok
1376 #endif
1377 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1379 if test $enable_clocale = auto; then
1380 # Test for bugs early in glibc-2.2.x series
1381 AC_TRY_RUN([
1382 #define _GNU_SOURCE 1
1383 #include <locale.h>
1384 #include <string.h>
1385 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1386 extern __typeof(newlocale) __newlocale;
1387 extern __typeof(duplocale) __duplocale;
1388 extern __typeof(strcoll_l) __strcoll_l;
1389 #endif
1390 int main()
1391 {
1392 const char __one[] = "Äuglein Augmen";
1393 const char __two[] = "Äuglein";
1394 int i;
1395 int j;
1396 __locale_t loc;
1397 __locale_t loc_dup;
1398 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1399 loc_dup = __duplocale(loc);
1400 i = __strcoll_l(__one, __two, loc);
1401 j = __strcoll_l(__one, __two, loc_dup);
1402 return 0;
1403 }
1404 ],
1405 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1406 [enable_clocale_flag=generic])
1407 fi
1409 # Set it to scream when it hurts.
1410 ac_save_CFLAGS="$CFLAGS"
1411 CFLAGS="-Wimplicit-function-declaration -Werror"
1413 # Use strxfrm_l if available.
1414 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1415 #include <string.h>
1416 #include <locale.h>],
1417 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
1418 AC_DEFINE(HAVE_STRXFRM_L, 1,
1419 [Define if strxfrm_l is available in <string.h>.]),)
1421 # Use strerror_l if available.
1422 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1423 #include <string.h>
1424 #include <locale.h>],
1425 [__locale_t loc; strerror_l(5, loc);],
1426 AC_DEFINE(HAVE_STRERROR_L, 1,
1427 [Define if strerror_l is available in <string.h>.]),)
1429 CFLAGS="$ac_save_CFLAGS"
1430 fi
1432 # Perhaps use strerror_r if available, and strerror_l isn't.
1433 ac_save_CFLAGS="$CFLAGS"
1434 CFLAGS="-Wimplicit-function-declaration -Werror"
1435 AC_TRY_COMPILE([#define _GNU_SOURCE 1
1436 #include <string.h>
1437 #include <locale.h>],
1438 [char s[128]; strerror_r(5, s, 128);],
1439 AC_DEFINE(HAVE_STRERROR_R, 1,
1440 [Define if strerror_r is available in <string.h>.]),)
1441 CFLAGS="$ac_save_CFLAGS"
1443 # Set configure bits for specified locale package
1444 AC_MSG_CHECKING([for C locale to use])
1445 case ${enable_clocale_flag} in
1446 generic)
1447 AC_MSG_RESULT(generic)
1449 CLOCALE_H=config/locale/generic/c_locale.h
1450 CLOCALE_CC=config/locale/generic/c_locale.cc
1451 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1452 CCOLLATE_CC=config/locale/generic/collate_members.cc
1453 CCTYPE_CC=config/locale/generic/ctype_members.cc
1454 CMESSAGES_H=config/locale/generic/messages_members.h
1455 CMESSAGES_CC=config/locale/generic/messages_members.cc
1456 CMONEY_CC=config/locale/generic/monetary_members.cc
1457 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1458 CTIME_H=config/locale/generic/time_members.h
1459 CTIME_CC=config/locale/generic/time_members.cc
1460 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1461 ;;
1462 darwin)
1463 AC_MSG_RESULT(darwin or freebsd)
1465 CLOCALE_H=config/locale/generic/c_locale.h
1466 CLOCALE_CC=config/locale/generic/c_locale.cc
1467 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1468 CCOLLATE_CC=config/locale/generic/collate_members.cc
1469 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1470 CMESSAGES_H=config/locale/generic/messages_members.h
1471 CMESSAGES_CC=config/locale/generic/messages_members.cc
1472 CMONEY_CC=config/locale/generic/monetary_members.cc
1473 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1474 CTIME_H=config/locale/generic/time_members.h
1475 CTIME_CC=config/locale/generic/time_members.cc
1476 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1477 ;;
1479 gnu)
1480 AC_MSG_RESULT(gnu)
1482 # Declare intention to use gettext, and add support for specific
1483 # languages.
1484 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1485 ALL_LINGUAS="de fr"
1487 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1488 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1489 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1490 USE_NLS=yes
1491 fi
1492 # Export the build objects.
1493 for ling in $ALL_LINGUAS; do \
1494 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1495 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1496 done
1497 AC_SUBST(glibcxx_MOFILES)
1498 AC_SUBST(glibcxx_POFILES)
1500 CLOCALE_H=config/locale/gnu/c_locale.h
1501 CLOCALE_CC=config/locale/gnu/c_locale.cc
1502 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1503 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1504 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1505 CMESSAGES_H=config/locale/gnu/messages_members.h
1506 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1507 CMONEY_CC=config/locale/gnu/monetary_members.cc
1508 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1509 CTIME_H=config/locale/gnu/time_members.h
1510 CTIME_CC=config/locale/gnu/time_members.cc
1511 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1512 ;;
1513 ieee_1003.1-2001)
1514 AC_MSG_RESULT(IEEE 1003.1)
1516 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1517 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1518 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1519 CCOLLATE_CC=config/locale/generic/collate_members.cc
1520 CCTYPE_CC=config/locale/generic/ctype_members.cc
1521 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1522 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1523 CMONEY_CC=config/locale/generic/monetary_members.cc
1524 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1525 CTIME_H=config/locale/generic/time_members.h
1526 CTIME_CC=config/locale/generic/time_members.cc
1527 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1528 ;;
1529 esac
1531 # This is where the testsuite looks for locale catalogs, using the
1532 # -DLOCALEDIR define during testsuite compilation.
1533 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1534 AC_SUBST(glibcxx_localedir)
1536 # A standalone libintl (e.g., GNU libintl) may be in use.
1537 if test $USE_NLS = yes; then
1538 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1539 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1540 fi
1541 if test $USE_NLS = yes; then
1542 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1543 [Define if NLS translations are to be used.])
1544 fi
1546 AC_SUBST(USE_NLS)
1547 AC_SUBST(CLOCALE_H)
1548 AC_SUBST(CMESSAGES_H)
1549 AC_SUBST(CCODECVT_CC)
1550 AC_SUBST(CCOLLATE_CC)
1551 AC_SUBST(CCTYPE_CC)
1552 AC_SUBST(CMESSAGES_CC)
1553 AC_SUBST(CMONEY_CC)
1554 AC_SUBST(CNUMERIC_CC)
1555 AC_SUBST(CTIME_H)
1556 AC_SUBST(CTIME_CC)
1557 AC_SUBST(CLOCALE_CC)
1558 AC_SUBST(CLOCALE_INTERNAL_H)
1559 ])
1562 dnl
1563 dnl Check for which std::allocator base class to use. The choice is
1564 dnl mapped from a subdirectory of include/ext.
1565 dnl
1566 dnl Default is new.
1567 dnl
1568 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1569 AC_MSG_CHECKING([for std::allocator base class])
1570 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1571 [use KIND for target std::allocator base],
1572 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1574 # If they didn't use this option switch, or if they specified --enable
1575 # with no specific model, we'll have to look for one. If they
1576 # specified --disable (???), do likewise.
1577 if test $enable_libstdcxx_allocator = no ||
1578 test $enable_libstdcxx_allocator = yes;
1579 then
1580 enable_libstdcxx_allocator=auto
1581 fi
1583 # Either a known package, or "auto". Auto implies the default choice
1584 # for a particular platform.
1585 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1587 # Probe for host-specific support if no specific model is specified.
1588 # Default to "new".
1589 if test $enable_libstdcxx_allocator_flag = auto; then
1590 case ${target_os} in
1591 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1592 enable_libstdcxx_allocator_flag=new
1593 ;;
1594 *)
1595 enable_libstdcxx_allocator_flag=new
1596 ;;
1597 esac
1598 fi
1599 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1602 # Set configure bits for specified locale package
1603 case ${enable_libstdcxx_allocator_flag} in
1604 bitmap)
1605 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1606 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1607 ;;
1608 malloc)
1609 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1610 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1611 ;;
1612 mt)
1613 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1614 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1615 ;;
1616 new)
1617 ALLOCATOR_H=config/allocator/new_allocator_base.h
1618 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1619 ;;
1620 pool)
1621 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1622 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1623 ;;
1624 esac
1626 AC_SUBST(ALLOCATOR_H)
1627 AC_SUBST(ALLOCATOR_NAME)
1628 ])
1631 dnl
1632 dnl Check for whether the Boost-derived checks should be turned on.
1633 dnl
1634 dnl --enable-concept-checks turns them on.
1635 dnl --disable-concept-checks leaves them off.
1636 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1637 dnl Where DEFAULT is either `yes' or `no'.
1638 dnl
1639 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1640 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1641 if test $enable_concept_checks = yes; then
1642 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1643 [Define to use concept checking code from the boost libraries.])
1644 fi
1645 ])
1648 dnl
1649 dnl Check for which I/O library to use: stdio, or something specific.
1650 dnl
1651 dnl Default is stdio.
1652 dnl
1653 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1654 AC_MSG_CHECKING([for underlying I/O to use])
1655 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1656 [use target-specific I/O package], [permit stdio])
1658 # Now that libio has been removed, you can have any color you want as long
1659 # as it's black. This is one big no-op until other packages are added, but
1660 # showing the framework never hurts.
1661 case ${enable_cstdio} in
1662 stdio)
1663 CSTDIO_H=config/io/c_io_stdio.h
1664 BASIC_FILE_H=config/io/basic_file_stdio.h
1665 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1666 AC_MSG_RESULT(stdio)
1667 ;;
1668 esac
1670 AC_SUBST(CSTDIO_H)
1671 AC_SUBST(BASIC_FILE_H)
1672 AC_SUBST(BASIC_FILE_CC)
1673 ])
1676 dnl
1677 dnl Check for "unusual" flags to pass to the compiler while building.
1678 dnl
1679 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1680 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1681 dnl --disable-cxx-flags passes nothing.
1682 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1683 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1684 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1685 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1686 dnl If "default flags" is an empty string, the effect is the same
1687 dnl as --disable or --enable=no.
1688 dnl
1689 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1690 AC_MSG_CHECKING([for extra compiler flags for building])
1691 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1692 [pass compiler FLAGS when building library],
1693 [case "x$enable_cxx_flags" in
1694 xno | x) enable_cxx_flags= ;;
1695 x-*) ;;
1696 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1697 esac])
1699 # Run through flags (either default or command-line) and set anything
1700 # extra (e.g., #defines) that must accompany particular g++ options.
1701 if test -n "$enable_cxx_flags"; then
1702 for f in $enable_cxx_flags; do
1703 case "$f" in
1704 -fhonor-std) ;;
1705 -*) ;;
1706 *) # and we're trying to pass /what/ exactly?
1707 AC_MSG_ERROR([compiler flags start with a -]) ;;
1708 esac
1709 done
1710 fi
1712 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1713 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1714 AC_SUBST(EXTRA_CXX_FLAGS)
1715 ])
1718 dnl
1719 dnl Check to see if debugging libraries are to be built.
1720 dnl
1721 dnl --enable-libstdcxx-debug
1722 dnl builds a separate set of debugging libraries in addition to the
1723 dnl normal (shared, static) libstdc++ binaries.
1724 dnl
1725 dnl --disable-libstdcxx-debug
1726 dnl builds only one (non-debug) version of libstdc++.
1727 dnl
1728 dnl --enable-libstdcxx-debug-flags=FLAGS
1729 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1730 dnl
1731 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1732 dnl Where DEFAULT is either `yes' or `no'.
1733 dnl
1734 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1735 AC_MSG_CHECKING([for additional debug build])
1736 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1737 AC_MSG_RESULT($enable_libstdcxx_debug)
1738 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1739 ])
1742 dnl
1743 dnl Check for explicit debug flags.
1744 dnl
1745 dnl --enable-libstdcxx-debug-flags='-O1'
1746 dnl is a general method for passing flags to be used when
1747 dnl building debug libraries with --enable-debug.
1748 dnl
1749 dnl --disable-libstdcxx-debug-flags does nothing.
1750 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1751 dnl If "default flags" is an empty string, the effect is the same
1752 dnl as --disable or --enable=no.
1753 dnl
1754 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1755 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1756 [pass compiler FLAGS when building debug library],
1757 [case "x$enable_libstdcxx_debug_flags" in
1758 xno | x) enable_libstdcxx_debug_flags= ;;
1759 x-*) ;;
1760 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1761 esac])
1763 # Option parsed, now set things appropriately
1764 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1765 AC_SUBST(DEBUG_FLAGS)
1767 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1768 ])
1771 dnl
1772 dnl Check if the user only wants a freestanding library implementation.
1773 dnl
1774 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1775 dnl installing only the headers required by [17.4.1.3] and the language
1776 dnl support library. More than that will be built (to keep the Makefiles
1777 dnl conveniently clean), but not installed.
1778 dnl
1779 dnl Sets:
1780 dnl is_hosted (yes/no)
1781 dnl
1782 dnl Defines:
1783 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1784 dnl
1785 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1786 AC_ARG_ENABLE([hosted-libstdcxx],
1787 AC_HELP_STRING([--disable-hosted-libstdcxx],
1788 [only build freestanding C++ runtime support]),,
1789 [case "$host" in
1790 arm*-*-symbianelf*)
1791 enable_hosted_libstdcxx=no
1792 ;;
1793 *)
1794 enable_hosted_libstdcxx=yes
1795 ;;
1796 esac])
1797 if test "$enable_hosted_libstdcxx" = no; then
1798 AC_MSG_NOTICE([Only freestanding libraries will be built])
1799 is_hosted=no
1800 hosted_define=0
1801 enable_abi_check=no
1802 enable_libstdcxx_pch=no
1803 else
1804 is_hosted=yes
1805 hosted_define=1
1806 fi
1807 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1808 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1809 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1810 ])
1813 dnl
1814 dnl Check for template specializations for the 'long long' type.
1815 dnl The result determines only whether 'long long' I/O is enabled; things
1816 dnl like numeric_limits<> specializations are always available.
1817 dnl
1818 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1819 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1820 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1821 dnl Where DEFAULT is either `yes' or `no'.
1822 dnl
1823 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1824 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1825 if test $enable_long_long = yes; then
1826 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1827 [Define if code specialized for long long should be used.])
1828 fi
1829 AC_MSG_CHECKING([for enabled long long specializations])
1830 AC_MSG_RESULT([$enable_long_long])
1831 ])
1834 dnl
1835 dnl Check for template specializations for the 'wchar_t' type.
1836 dnl
1837 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1838 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1839 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1840 dnl Where DEFAULT is either `yes' or `no'.
1841 dnl
1842 dnl Necessary support must also be present.
1843 dnl
1844 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1845 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1847 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1848 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1849 AC_MSG_CHECKING([for mbstate_t])
1850 AC_TRY_COMPILE([#include <wchar.h>],
1851 [mbstate_t teststate;],
1852 have_mbstate_t=yes, have_mbstate_t=no)
1853 AC_MSG_RESULT($have_mbstate_t)
1854 if test x"$have_mbstate_t" = xyes; then
1855 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1856 fi
1858 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1859 # ac_has_wchar_h.
1860 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1862 if test x"$enable_wchar_t" = x"yes"; then
1864 AC_LANG_SAVE
1865 AC_LANG_CPLUSPLUS
1867 if test x"$ac_has_wchar_h" = xyes &&
1868 test x"$ac_has_wctype_h" = xyes; then
1869 AC_TRY_COMPILE([#include <wchar.h>
1870 #include <stddef.h>
1871 wint_t i;
1872 long l = WEOF;
1873 long j = WCHAR_MIN;
1874 long k = WCHAR_MAX;
1875 namespace test
1876 {
1877 using ::btowc;
1878 using ::fgetwc;
1879 using ::fgetws;
1880 using ::fputwc;
1881 using ::fputws;
1882 using ::fwide;
1883 using ::fwprintf;
1884 using ::fwscanf;
1885 using ::getwc;
1886 using ::getwchar;
1887 using ::mbrlen;
1888 using ::mbrtowc;
1889 using ::mbsinit;
1890 using ::mbsrtowcs;
1891 using ::putwc;
1892 using ::putwchar;
1893 using ::swprintf;
1894 using ::swscanf;
1895 using ::ungetwc;
1896 using ::vfwprintf;
1897 using ::vswprintf;
1898 using ::vwprintf;
1899 using ::wcrtomb;
1900 using ::wcscat;
1901 using ::wcschr;
1902 using ::wcscmp;
1903 using ::wcscoll;
1904 using ::wcscpy;
1905 using ::wcscspn;
1906 using ::wcsftime;
1907 using ::wcslen;
1908 using ::wcsncat;
1909 using ::wcsncmp;
1910 using ::wcsncpy;
1911 using ::wcspbrk;
1912 using ::wcsrchr;
1913 using ::wcsrtombs;
1914 using ::wcsspn;
1915 using ::wcsstr;
1916 using ::wcstod;
1917 using ::wcstok;
1918 using ::wcstol;
1919 using ::wcstoul;
1920 using ::wcsxfrm;
1921 using ::wctob;
1922 using ::wmemchr;
1923 using ::wmemcmp;
1924 using ::wmemcpy;
1925 using ::wmemmove;
1926 using ::wmemset;
1927 using ::wprintf;
1928 using ::wscanf;
1929 }
1930 ],[],[], [enable_wchar_t=no])
1931 else
1932 enable_wchar_t=no
1933 fi
1935 AC_LANG_RESTORE
1936 fi
1938 if test x"$enable_wchar_t" = x"yes"; then
1939 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1940 [Define if code specialized for wchar_t should be used.])
1941 fi
1943 AC_MSG_CHECKING([for enabled wchar_t specializations])
1944 AC_MSG_RESULT([$enable_wchar_t])
1945 ])
1948 dnl
1949 dnl Check to see if building and using a C++ precompiled header can be done.
1950 dnl
1951 dnl --enable-libstdcxx-pch=yes
1952 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1953 dnl may work, after some light-hearted attempts to puzzle out compiler
1954 dnl support, flip bits on in include/Makefile.am
1955 dnl
1956 dnl --disable-libstdcxx-pch
1957 dnl turns off attempts to use or build stdc++.h.gch.
1958 dnl
1959 dnl Substs:
1960 dnl glibcxx_PCHFLAGS
1961 dnl
1962 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1963 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1964 if test $enable_libstdcxx_pch = yes; then
1965 AC_CACHE_CHECK([for compiler with PCH support],
1966 [glibcxx_cv_prog_CXX_pch],
1967 [ac_save_CXXFLAGS="$CXXFLAGS"
1968 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1969 AC_LANG_SAVE
1970 AC_LANG_CPLUSPLUS
1971 echo '#include <math.h>' > conftest.h
1972 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1973 -o conftest.h.gch 1>&5 2>&1 &&
1974 echo '#error "pch failed"' > conftest.h &&
1975 echo '#include "conftest.h"' > conftest.cc &&
1976 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1977 then
1978 glibcxx_cv_prog_CXX_pch=yes
1979 else
1980 glibcxx_cv_prog_CXX_pch=no
1981 fi
1982 rm -f conftest*
1983 CXXFLAGS=$ac_save_CXXFLAGS
1984 AC_LANG_RESTORE
1985 ])
1986 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1987 fi
1989 AC_MSG_CHECKING([for enabled PCH])
1990 AC_MSG_RESULT([$enable_libstdcxx_pch])
1992 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1993 if test $enable_libstdcxx_pch = yes; then
1994 glibcxx_PCHFLAGS="-include bits/stdtr1c++.h"
1995 else
1996 glibcxx_PCHFLAGS=""
1997 fi
1998 AC_SUBST(glibcxx_PCHFLAGS)
1999 ])
2002 dnl
2003 dnl Check for atomic builtins.
2004 dnl See:
2005 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
2006 dnl
2007 dnl This checks to see if the host supports the compiler-generated
2008 dnl builtins for atomic operations. Note, this is intended to be an
2009 dnl all-or-nothing switch, so all the atomic operations that are used
2010 dnl should be checked.
2011 dnl
2012 dnl Note:
2013 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
2014 dnl see: CHECK_SYNC_FETCH_AND_ADD
2015 dnl
2016 dnl Defines:
2017 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
2018 dnl
2019 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
2020 AC_MSG_CHECKING([for atomic builtins])
2021 AC_LANG_SAVE
2022 AC_LANG_CPLUSPLUS
2024 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2025 cat > conftest.$ac_ext << EOF
2026 [#]line __oline__ "configure"
2027 int main()
2028 {
2029 // NB: _Atomic_word not necessarily int.
2030 typedef int atomic_type;
2031 atomic_type c1;
2032 atomic_type c2;
2033 const atomic_type c3(0);
2034 if (__sync_fetch_and_add(&c1, c2) == c3)
2035 {
2036 // Do something.
2037 }
2038 return 0;
2039 }
2040 EOF
2041 old_CXXFLAGS="$CXXFLAGS"
2042 CXXFLAGS=-S
2043 if AC_TRY_EVAL(ac_compile); then
2044 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
2045 enable_atomic_builtins=no
2046 else
2047 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
2048 [Define if builtin atomic operations are supported on this host.])
2049 enable_atomic_builtins=yes
2050 atomicity_dir=cpu/generic/atomicity_builtins
2051 fi
2052 fi
2053 CXXFLAGS="$old_CXXFLAGS"
2054 rm -f conftest*
2056 # Now, if still generic, set to mutex.
2057 if test $atomicity_dir = "cpu/generic" ; then
2058 atomicity_dir=cpu/generic/atomicity_mutex
2059 fi
2060 AC_LANG_RESTORE
2061 AC_MSG_RESULT($enable_atomic_builtins)
2062 ])
2065 dnl
2066 dnl Check for exception handling support. If an explicit enable/disable
2067 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
2068 dnl target may or may not support call frame exceptions.
2069 dnl
2070 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
2071 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
2072 dnl Neither one forces an attempt at detection.
2073 dnl
2074 dnl Defines:
2075 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
2076 dnl
2077 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2078 AC_MSG_CHECKING([for exception model to use])
2079 AC_LANG_SAVE
2080 AC_LANG_CPLUSPLUS
2081 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2082 [force use of builtin_setjmp for exceptions],
2083 [permit yes|no|auto])
2085 if test $enable_sjlj_exceptions = auto; then
2086 # Botheration. Now we've got to detect the exception model. Link tests
2087 # against libgcc.a are problematic since we've not been given proper -L
2088 # bits for single-tree newlib and libgloss.
2089 #
2090 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2091 cat > conftest.$ac_ext << EOF
2092 [#]line __oline__ "configure"
2093 struct S { ~S(); };
2094 void bar();
2095 void foo()
2096 {
2097 S s;
2098 bar();
2099 }
2100 EOF
2101 old_CXXFLAGS="$CXXFLAGS"
2102 CXXFLAGS=-S
2103 if AC_TRY_EVAL(ac_compile); then
2104 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2105 enable_sjlj_exceptions=yes
2106 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2107 enable_sjlj_exceptions=no
2108 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2109 enable_sjlj_exceptions=no
2110 fi
2111 fi
2112 CXXFLAGS="$old_CXXFLAGS"
2113 rm -f conftest*
2114 fi
2116 # This is a tad weird, for hysterical raisins. We have to map
2117 # enable/disable to two different models.
2118 case $enable_sjlj_exceptions in
2119 yes)
2120 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2121 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2122 ac_exception_model_name=sjlj
2123 ;;
2124 no)
2125 ac_exception_model_name="call frame"
2126 ;;
2127 *)
2128 AC_MSG_ERROR([unable to detect exception model])
2129 ;;
2130 esac
2131 AC_LANG_RESTORE
2132 AC_MSG_RESULT($ac_exception_model_name)
2133 ])
2136 dnl
2137 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2138 dnl
2139 dnl --enable-visibility enables attempt to use visibility attributes.
2140 dnl --disable-visibility turns off all use of visibility attributes.
2141 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2142 dnl Where DEFAULT is 'yes'.
2143 dnl
2144 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2145 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2147 if test x$enable_visibility = xyes ; then
2148 dnl all hail libgfortran
2149 dnl Check whether the target supports hidden visibility.
2150 AC_CACHE_CHECK([whether the target supports hidden visibility],
2151 have_attribute_visibility, [
2152 save_CFLAGS="$CFLAGS"
2153 CFLAGS="$CFLAGS -Werror"
2154 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2155 [], have_attribute_visibility=yes,
2156 have_attribute_visibility=no)
2157 CFLAGS="$save_CFLAGS"])
2158 if test $have_attribute_visibility = no; then
2159 enable_visibility=no
2160 fi
2161 fi
2163 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2164 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2165 ])
2168 dnl
2169 dnl Add version tags to symbols in shared library (or not), additionally
2170 dnl marking other symbols as private/local (or not).
2171 dnl
2172 dnl --enable-symvers=style adds a version script to the linker call when
2173 dnl creating the shared library. The choice of version script is
2174 dnl controlled by 'style'.
2175 dnl --disable-symvers does not.
2176 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2177 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2178 dnl choose a default style based on linker characteristics. Passing
2179 dnl 'no' disables versioning.
2180 dnl
2181 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2183 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2184 [enables symbol versioning of the shared library],
2185 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2187 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2188 # don't know enough about $LD to do tricks...
2189 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2191 # Turn a 'yes' into a suitable default.
2192 if test x$enable_symvers = xyes ; then
2193 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2194 enable_symvers=no
2195 else
2196 if test $with_gnu_ld = yes ; then
2197 enable_symvers=gnu
2198 else
2199 case ${target_os} in
2200 darwin*)
2201 enable_symvers=darwin ;;
2202 *)
2203 enable_symvers=no ;;
2204 esac
2205 fi
2206 fi
2207 fi
2209 # Check to see if 'darwin' or 'darwin-export' can win.
2210 if test x$enable_symvers = xdarwin-export ; then
2211 enable_symvers=darwin
2212 fi
2214 # Check to see if 'gnu' can win.
2215 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2216 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2217 AC_MSG_CHECKING([for shared libgcc])
2218 ac_save_CFLAGS="$CFLAGS"
2219 CFLAGS=' -lgcc_s'
2220 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2221 CFLAGS="$ac_save_CFLAGS"
2222 if test $glibcxx_shared_libgcc = no; then
2223 cat > conftest.c <<EOF
2224 int main (void) { return 0; }
2225 EOF
2226 changequote(,)dnl
2227 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2228 -shared -shared-libgcc -o conftest.so \
2229 conftest.c -v 2>&1 >/dev/null \
2230 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2231 changequote([,])dnl
2232 rm -f conftest.c conftest.so
2233 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2234 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2235 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2236 CFLAGS="$ac_save_CFLAGS"
2237 fi
2238 fi
2239 AC_MSG_RESULT($glibcxx_shared_libgcc)
2241 # For GNU ld, we need at least this version. The format is described in
2242 # GLIBCXX_CHECK_LINKER_FEATURES above.
2243 glibcxx_min_gnu_ld_version=21400
2245 # If no shared libgcc, can't win.
2246 if test $glibcxx_shared_libgcc != yes; then
2247 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2248 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2249 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2250 enable_symvers=no
2251 elif test $with_gnu_ld != yes ; then
2252 # just fail for now
2253 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2254 AC_MSG_WARN([=== you are not using the GNU linker.])
2255 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2256 enable_symvers=no
2257 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2258 # The right tools, the right setup, but too old. Fallbacks?
2259 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2260 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2261 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2262 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2263 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2264 enable_symvers=no
2265 fi
2266 fi
2268 # Everything parsed; figure out what file to use.
2269 case $enable_symvers in
2270 no)
2271 SYMVER_FILE=config/abi/pre/none.ver
2272 ;;
2273 gnu)
2274 SYMVER_FILE=config/abi/pre/gnu.ver
2275 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2276 [Define to use GNU versioning in the shared library.])
2277 ;;
2278 gnu-versioned-namespace)
2279 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2280 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2281 [Define to use GNU namespace versioning in the shared library.])
2282 ;;
2283 darwin)
2284 SYMVER_FILE=config/abi/pre/gnu.ver
2285 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2286 [Define to use darwin versioning in the shared library.])
2287 ;;
2288 esac
2290 if test x$enable_symvers != xno ; then
2291 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2292 [Define to use symbol versioning in the shared library.])
2293 fi
2295 AC_SUBST(SYMVER_FILE)
2296 AC_SUBST(port_specific_symbol_files)
2297 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2298 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2299 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2300 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2301 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2303 # Now, set up compatibility support, if any.
2304 # In addition, need this to deal with std::size_t mangling in
2305 # src/compatibility.cc. In a perfect world, could use
2306 # typeid(std::size_t).name()[0] to do direct substitution.
2307 AC_MSG_CHECKING([for size_t as unsigned int])
2308 ac_save_CFLAGS="$CFLAGS"
2309 CFLAGS="-Werror"
2310 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2311 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2312 CFLAGS=$ac_save_CFLAGS
2313 if test "$glibcxx_size_t_is_i" = yes; then
2314 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2315 fi
2316 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2318 AC_MSG_CHECKING([for ptrdiff_t as int])
2319 ac_save_CFLAGS="$CFLAGS"
2320 CFLAGS="-Werror"
2321 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2322 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2323 CFLAGS=$ac_save_CFLAGS
2324 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2325 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2326 fi
2327 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2328 ])
2331 dnl
2332 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2333 dnl We must stage the required headers so that they will be installed
2334 dnl with the library (unlike libgcc, the STL implementation is provided
2335 dnl solely within headers). Since we must not inject random user-space
2336 dnl macro names into user-provided C++ code, we first stage into <file>-in
2337 dnl and process to <file> with an output command. The reason for a two-
2338 dnl stage process here is to correctly handle $srcdir!=$objdir without
2339 dnl having to write complex code (the sed commands to clean the macro
2340 dnl namespace are complex and fragile enough as it is). We must also
2341 dnl add a relative path so that -I- is supported properly.
2342 dnl
2343 dnl Substs:
2344 dnl glibcxx_thread_h
2345 dnl
2346 dnl Defines:
2347 dnl HAVE_GTHR_DEFAULT
2348 dnl
2349 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2350 AC_MSG_CHECKING([for thread model used by GCC])
2351 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2352 AC_MSG_RESULT([$target_thread_file])
2354 if test $target_thread_file != single; then
2355 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2356 [Define if gthr-default.h exists
2357 (meaning that threading support is enabled).])
2358 fi
2360 glibcxx_thread_h=gthr-$target_thread_file.h
2362 dnl Check for __GTHREADS define.
2363 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2364 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2365 enable_thread=yes
2366 else
2367 enable_thread=no
2368 fi
2370 AC_SUBST(glibcxx_thread_h)
2371 ])
2374 # Check whether LC_MESSAGES is available in <locale.h>.
2375 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2376 #
2377 # This file file be copied and used freely without restrictions. It can
2378 # be used in projects which are not available under the GNU Public License
2379 # but which still want to provide support for the GNU gettext functionality.
2380 # Please note that the actual code is *not* freely available.
2382 # serial 1
2383 AC_DEFUN([AC_LC_MESSAGES], [
2384 AC_CHECK_HEADER(locale.h, [
2385 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2386 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2387 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2388 if test $ac_cv_val_LC_MESSAGES = yes; then
2389 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2390 [Define if LC_MESSAGES is available in <locale.h>.])
2391 fi
2392 ])
2393 ])
2395 # Macros from the top-level gcc directory.
2396 m4_include([../config/tls.m4])