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enc_filebuf.h: Resurrect, update.
[gcc.git] / libstdc++-v3 / acinclude.m4
1
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
17
18
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 ])
29
30 dnl
31 dnl Initialize the rest of the library configury. At this point we have
32 dnl variables like $host.
33 dnl
34 dnl Sets:
35 dnl SUBDIRS
36 dnl Substs:
37 dnl glibcxx_builddir (absolute path)
38 dnl glibcxx_srcdir (absolute path)
39 dnl toplevel_srcdir (absolute path)
40 dnl with_cross_host
41 dnl with_newlib
42 dnl with_target_subdir
43 dnl plus
44 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45 dnl - default settings for all AM_CONFITIONAL test variables
46 dnl - lots of tools, like CC and CXX
47 dnl
48 AC_DEFUN([GLIBCXX_CONFIGURE], [
49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
52 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
53 SUBDIRS='glibcxx_SUBDIRS'
54
55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
58 glibcxx_builddir=`${PWDCMD-pwd}`
59 case $srcdir in
60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
62 esac
63 toplevel_srcdir=${glibcxx_srcdir}/..
64 AC_SUBST(glibcxx_builddir)
65 AC_SUBST(glibcxx_srcdir)
66 AC_SUBST(toplevel_srcdir)
67
68 # We use these options to decide which functions to include. They are
69 # set from the top level.
70 AC_ARG_WITH([target-subdir],
71 AC_HELP_STRING([--with-target-subdir=SUBDIR],
72 [configuring in a subdirectory]))
73
74 AC_ARG_WITH([cross-host],
75 AC_HELP_STRING([--with-cross-host=HOST],
76 [configuring with a cross compiler]))
77
78 AC_ARG_WITH([newlib],
79 AC_HELP_STRING([--with-newlib],
80 [assume newlib as a system C library]))
81
82 # We're almost certainly being configured before anything else which uses
83 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
84 # we not cache the value of CXX that we "discover" here, because it's set
85 # to something unique for us and libjava. Other target libraries need to
86 # find CXX for themselves. We yank the rug out from under the normal AC_*
87 # process by sneakily renaming the cache variable. This also lets us debug
88 # the value of "our" CXX in postmortems.
89 #
90 # We must also force CXX to /not/ be a precious variable, otherwise the
91 # wrong (non-multilib-adjusted) value will be used in multilibs. This
92 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
93 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
94 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
95 #
96 # -fno-builtin must be present here so that a non-conflicting form of
97 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
98
99 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
100 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
101 m4_define([_AC_ARG_VAR_PRECIOUS],[])
102 save_CXXFLAGS="$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)
110
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'
115
116 AC_CHECK_TOOL(AS, as)
117 AC_CHECK_TOOL(AR, ar)
118 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
119
120 AM_MAINTAINER_MODE
121
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
127
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)
136
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 ])
141
142
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"
163
164 # Check for maintainer-mode bits.
165 if test x"$USE_MAINTAINER_MODE" = xno; then
166 WERROR=''
167 else
168 WERROR='-Werror'
169 fi
170
171 # Check for -ffunction-sections -fdata-sections
172 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
173 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
174 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
175 if test "$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($ac_fdsections)
185
186 AC_LANG_RESTORE
187 AC_SUBST(WERROR)
188 AC_SUBST(SECTION_FLAGS)
189 ])
190
191
192 dnl
193 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
194 dnl the native linker is in use, all variables will be defined to something
195 dnl safe (like an empty string).
196 dnl
197 dnl Defines:
198 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
199 dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
200 dnl LD (as a side effect of testing)
201 dnl Sets:
202 dnl with_gnu_ld
203 dnl glibcxx_gnu_ld_version (possibly)
204 dnl
205 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
206 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
207 dnl
208 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
209 # If we're not using GNU ld, then there's no point in even trying these
210 # tests. Check for that first. We should have already tested for gld
211 # by now (in libtool), but require it now just to be safe...
212 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
213 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
214 AC_REQUIRE([AC_PROG_LD])
215 AC_REQUIRE([AC_PROG_AWK])
216
217 # The name set by libtool depends on the version of libtool. Shame on us
218 # for depending on an impl detail, but c'est la vie. Older versions used
219 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
220 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
221 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
222 # set (hence we're using an older libtool), then set it.
223 if test x${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
231
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
244
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 $glibcxx_gcsections_min_ld ; then
249
250 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
251 # NB: This flag only works reliably after 2.16.1. Configure tests
252 # for this are difficult, so hard wire a value that should work.
253
254 # All these tests are for C++, but run with the "C" compiler driver.
255 # Need to do this so that g++ won't try to link in libstdc++/libsupc++.
256 ac_test_CFLAGS="${CFLAGS+set}"
257 ac_save_CFLAGS="$CFLAGS"
258 CFLAGS='-x c++ -Wl,--gc-sections'
259
260 # Check for -Wl,--gc-sections
261 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
262 AC_TRY_LINK([ int one(void) { return 1; }
263 int two(void) { return 2; }
264 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
265 if test "$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)
280
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
288
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
301
302 # Set linker optimization flags.
303 if test x"$with_gnu_ld" = x"yes"; then
304 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
305 fi
306
307 AC_SUBST(SECTION_LDFLAGS)
308 AC_SUBST(OPT_LDFLAGS)
309 ])
310
311
312 dnl
313 dnl Check for headers for, and arguments to, the setrlimit() function.
314 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
315 dnl
316 dnl Defines:
317 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
318 dnl various HAVE_LIMIT_* for individual limit names
319 dnl
320 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
321 AC_MSG_CHECKING([for RLIMIT_$1])
322 AC_TRY_COMPILE(
323 [#include <unistd.h>
324 #include <sys/time.h>
325 #include <sys/resource.h>
326 ],
327 [ int f = RLIMIT_$1 ; ],
328 [glibcxx_mresult=1], [glibcxx_mresult=0])
329 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
330 [Only used in build directory testsuite_hooks.h.])
331 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
332 AC_MSG_RESULT($res)
333 ])
334
335 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
336 setrlimit_have_headers=yes
337 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
338 [],
339 [setrlimit_have_headers=no])
340 # If don't have the headers, then we can't run the tests now, and we
341 # won't be seeing any of these during testsuite compilation.
342 if test $setrlimit_have_headers = yes; then
343 # Can't do these in a loop, else the resulting syntax is wrong.
344 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
345 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
346 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
347 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
348 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
349
350 # Check for rlimit, setrlimit.
351 AC_CACHE_VAL(ac_setrlimit, [
352 AC_TRY_COMPILE(
353 [#include <unistd.h>
354 #include <sys/time.h>
355 #include <sys/resource.h>
356 ],
357 [struct rlimit r;
358 setrlimit(0, &r);],
359 [ac_setrlimit=yes], [ac_setrlimit=no])
360 ])
361 fi
362
363 AC_MSG_CHECKING([for testsuite resource limits support])
364 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
365 ac_res_limits=yes
366 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
367 [Define if using setrlimit to set resource limits during
368 "make check"])
369 else
370 ac_res_limits=no
371 fi
372 AC_MSG_RESULT($ac_res_limits)
373 ])
374
375
376 dnl
377 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
378 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
379 dnl
380 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
381 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
382 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
383 AC_TRY_LINK(
384 [#include <sys/stat.h>],
385 [struct stat buffer;
386 fstat(0, &buffer);
387 S_ISREG(buffer.st_mode);],
388 [glibcxx_cv_S_ISREG=yes],
389 [glibcxx_cv_S_ISREG=no])
390 ])
391 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
392 AC_TRY_LINK(
393 [#include <sys/stat.h>],
394 [struct stat buffer;
395 fstat(0, &buffer);
396 S_IFREG & buffer.st_mode;],
397 [glibcxx_cv_S_IFREG=yes],
398 [glibcxx_cv_S_IFREG=no])
399 ])
400 res=no
401 if test $glibcxx_cv_S_ISREG = yes; then
402 AC_DEFINE(HAVE_S_ISREG, 1,
403 [Define if S_IFREG is available in <sys/stat.h>.])
404 res=S_ISREG
405 elif test $glibcxx_cv_S_IFREG = yes; then
406 AC_DEFINE(HAVE_S_IFREG, 1,
407 [Define if S_IFREG is available in <sys/stat.h>.])
408 res=S_IFREG
409 fi
410 AC_MSG_RESULT($res)
411 ])
412
413
414 dnl
415 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
416 dnl
417 AC_DEFUN([GLIBCXX_CHECK_POLL], [
418 AC_MSG_CHECKING([for poll])
419 AC_CACHE_VAL(glibcxx_cv_POLL, [
420 AC_TRY_LINK(
421 [#include <poll.h>],
422 [struct pollfd pfd[1];
423 pfd[0].events = POLLIN;
424 poll(pfd, 1, 0);],
425 [glibcxx_cv_POLL=yes],
426 [glibcxx_cv_POLL=no])
427 ])
428 if test $glibcxx_cv_POLL = yes; then
429 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
430 fi
431 AC_MSG_RESULT($glibcxx_cv_POLL)
432 ])
433
434
435 dnl
436 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
437 dnl
438 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
439 AC_MSG_CHECKING([for writev])
440 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
441 AC_TRY_LINK(
442 [#include <sys/uio.h>],
443 [struct iovec iov[2];
444 writev(0, iov, 0);],
445 [glibcxx_cv_WRITEV=yes],
446 [glibcxx_cv_WRITEV=no])
447 ])
448 if test $glibcxx_cv_WRITEV = yes; then
449 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
450 fi
451 AC_MSG_RESULT($glibcxx_cv_WRITEV)
452 ])
453
454
455 dnl
456 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
457 dnl
458 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
459 AC_MSG_CHECKING([for int64_t])
460 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
461 AC_TRY_COMPILE(
462 [#include <stdint.h>],
463 [int64_t var;],
464 [glibcxx_cv_INT64_T=yes],
465 [glibcxx_cv_INT64_T=no])
466 ])
467 if test $glibcxx_cv_INT64_T = yes; then
468 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
469 fi
470 AC_MSG_RESULT($glibcxx_cv_INT64_T)
471 ])
472
473
474 dnl
475 dnl Check whether LFS support is available.
476 dnl
477 AC_DEFUN([GLIBCXX_CHECK_LFS], [
478 AC_LANG_SAVE
479 AC_LANG_CPLUSPLUS
480 ac_save_CXXFLAGS="$CXXFLAGS"
481 CXXFLAGS="$CXXFLAGS -fno-exceptions"
482 AC_MSG_CHECKING([for LFS support])
483 AC_CACHE_VAL(glibcxx_cv_LFS, [
484 AC_TRY_LINK(
485 [#include <unistd.h>
486 #include <stdio.h>
487 #include <sys/stat.h>
488 ],
489 [FILE* fp;
490 fopen64("t", "w");
491 fseeko64(fp, 0, SEEK_CUR);
492 ftello64(fp);
493 lseek64(1, 0, SEEK_CUR);
494 struct stat64 buf;
495 fstat64(1, &buf);],
496 [glibcxx_cv_LFS=yes],
497 [glibcxx_cv_LFS=no])
498 ])
499 if test $glibcxx_cv_LFS = yes; then
500 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
501 fi
502 AC_MSG_RESULT($glibcxx_cv_LFS)
503 CXXFLAGS="$ac_save_CXXFLAGS"
504 AC_LANG_RESTORE
505 ])
506
507
508 dnl
509 dnl Check for whether a fully dynamic basic_string implementation should
510 dnl be turned on, that does not put empty objects in per-process static
511 dnl memory (mostly useful together with shared memory allocators, see PR
512 dnl libstdc++/16612 for details).
513 dnl
514 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
515 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
516 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
517 dnl Where DEFAULT is either `yes' or `no'.
518 dnl
519 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
520 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
521 if test $enable_fully_dynamic_string = yes; then
522 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
523 [Define if a fully dynamic basic_string is wanted.])
524 fi
525 ])
526
527
528 dnl
529 dnl Does any necessary configuration of the testsuite directory. Generates
530 dnl the testsuite_hooks.h header.
531 dnl
532 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
533 dnl
534 dnl Sets:
535 dnl enable_abi_check
536 dnl GLIBCXX_TEST_WCHAR_T
537 dnl GLIBCXX_TEST_THREAD
538 dnl Substs:
539 dnl baseline_dir
540 dnl
541 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
542 if $GLIBCXX_IS_NATIVE ; then
543 # Do checks for resource limit functions.
544 GLIBCXX_CHECK_SETRLIMIT
545
546 # Look for setenv, so that extended locale tests can be performed.
547 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
548 fi
549
550 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
551 test $enable_symvers != no; then
552 case "$host" in
553 *-*-cygwin*)
554 enable_abi_check=no ;;
555 *)
556 enable_abi_check=yes ;;
557 esac
558 else
559 # Only build this as native, since automake does not understand
560 # CXX_FOR_BUILD.
561 enable_abi_check=no
562 fi
563
564 # Export file names for ABI checking.
565 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
566 AC_SUBST(baseline_dir)
567 ])
568
569
570 dnl
571 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
572 dnl
573 dnl Substs:
574 dnl GLIBCXX_INCLUDES
575 dnl TOPLEVEL_INCLUDES
576 dnl
577 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
578 # Used for every C++ compile we perform.
579 GLIBCXX_INCLUDES="\
580 -I$glibcxx_builddir/include/$host_alias \
581 -I$glibcxx_builddir/include \
582 -I$glibcxx_srcdir/libsupc++"
583
584 # For Canadian crosses, pick this up too.
585 if test $CANADIAN = yes; then
586 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
587 fi
588
589 # Stuff in the actual top level. Currently only used by libsupc++ to
590 # get unwind* headers from the gcc dir.
591 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
592 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
593
594 # Now, export this to all the little Makefiles....
595 AC_SUBST(GLIBCXX_INCLUDES)
596 AC_SUBST(TOPLEVEL_INCLUDES)
597 ])
598
599
600 dnl
601 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
602 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
603 dnl
604 dnl Substs:
605 dnl OPTIMIZE_CXXFLAGS
606 dnl WARN_FLAGS
607 dnl
608 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
609 # Optimization flags that are probably a good idea for thrill-seekers. Just
610 # uncomment the lines below and make, everything else is ready to go...
611 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
612 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
613 AC_SUBST(OPTIMIZE_CXXFLAGS)
614
615 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
616 AC_SUBST(WARN_FLAGS)
617 ])
618
619
620 dnl
621 dnl All installation directory information is determined here.
622 dnl
623 dnl Substs:
624 dnl gxx_install_dir
625 dnl glibcxx_prefixdir
626 dnl glibcxx_toolexecdir
627 dnl glibcxx_toolexeclibdir
628 dnl
629 dnl Assumes cross_compiling bits already done, and with_cross_host in
630 dnl particular.
631 dnl
632 dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
633 dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
634 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
635 glibcxx_toolexecdir=no
636 glibcxx_toolexeclibdir=no
637 glibcxx_prefixdir=$prefix
638
639 AC_MSG_CHECKING([for gxx-include-dir])
640 AC_ARG_WITH([gxx-include-dir],
641 AC_HELP_STRING([--with-gxx-include-dir=DIR],
642 [installation directory for include files]),
643 [case "$withval" in
644 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
645 no) gxx_include_dir=no ;;
646 *) gxx_include_dir=$withval ;;
647 esac],
648 [gxx_include_dir=no])
649 AC_MSG_RESULT($gxx_include_dir)
650
651 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
652 AC_ARG_ENABLE([version-specific-runtime-libs],
653 AC_HELP_STRING([--enable-version-specific-runtime-libs],
654 [Specify that runtime libraries should be installed in a compiler-specific directory]),
655 [case "$enableval" in
656 yes) version_specific_libs=yes ;;
657 no) version_specific_libs=no ;;
658 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
659 esac],
660 [version_specific_libs=no])
661 AC_MSG_RESULT($version_specific_libs)
662
663 # Default case for install directory for include files.
664 if test $version_specific_libs = no && test $gxx_include_dir = no; then
665 gxx_include_dir='include/c++/${gcc_version}'
666 if test -n "$with_cross_host" &&
667 test x"$with_cross_host" != x"no"; then
668 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
669 else
670 gxx_include_dir='${prefix}/'"$gxx_include_dir"
671 fi
672 fi
673
674 # Version-specific runtime libs processing.
675 if test $version_specific_libs = yes; then
676 # Need the gcc compiler version to know where to install libraries
677 # and header files if --enable-version-specific-runtime-libs option
678 # is selected. FIXME: these variables are misnamed, there are
679 # no executables installed in _toolexecdir or _toolexeclibdir.
680 if test x"$gxx_include_dir" = x"no"; then
681 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
682 fi
683 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
684 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
685 fi
686
687 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
688 # Install a library built with a cross compiler in tooldir, not libdir.
689 if test x"$glibcxx_toolexecdir" = x"no"; then
690 if test -n "$with_cross_host" &&
691 test x"$with_cross_host" != x"no"; then
692 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
693 glibcxx_toolexeclibdir='${toolexecdir}/lib'
694 else
695 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
696 glibcxx_toolexeclibdir='${libdir}'
697 fi
698 multi_os_directory=`$CXX -print-multi-os-directory`
699 case $multi_os_directory in
700 .) ;; # Avoid trailing /.
701 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
702 esac
703 fi
704
705 AC_MSG_CHECKING([for install location])
706 AC_MSG_RESULT($gxx_include_dir)
707
708 AC_SUBST(glibcxx_prefixdir)
709 AC_SUBST(gxx_include_dir)
710 AC_SUBST(glibcxx_toolexecdir)
711 AC_SUBST(glibcxx_toolexeclibdir)
712 ])
713
714
715 dnl
716 dnl GLIBCXX_ENABLE
717 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
718 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
719 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
720 dnl
721 dnl See docs/html/17_intro/configury.html#enable for documentation.
722 dnl
723 m4_define([GLIBCXX_ENABLE],[dnl
724 m4_define([_g_switch],[--enable-$1])dnl
725 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
726 AC_ARG_ENABLE($1,_g_help,
727 m4_bmatch([$5],
728 [^permit ],
729 [[
730 case "$enableval" in
731 m4_bpatsubst([$5],[permit ])) ;;
732 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
733 dnl Idea for future: generate a URL pointing to
734 dnl "onlinedocs/configopts.html#whatever"
735 esac
736 ]],
737 [^$],
738 [[
739 case "$enableval" in
740 yes|no) ;;
741 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
742 esac
743 ]],
744 [[$5]]),
745 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
746 m4_undefine([_g_switch])dnl
747 m4_undefine([_g_help])dnl
748 ])
749
750
751 dnl
752 dnl Check for ISO/IEC 9899:1999 "C99" support.
753 dnl
754 dnl --enable-c99 defines _GLIBCXX_USE_C99
755 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
756 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
757 dnl Where DEFAULT is either `yes' or `no'.
758 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
759 dnl
760 AC_DEFUN([GLIBCXX_ENABLE_C99], [
761 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
762
763 if test x"$enable_c99" = x"yes"; then
764
765 AC_LANG_SAVE
766 AC_LANG_CPLUSPLUS
767
768 # Check for the existence of <math.h> functions used if C99 is enabled.
769 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
770 AC_CACHE_VAL(ac_c99_math, [
771 AC_TRY_COMPILE([#include <math.h>],
772 [fpclassify(0.0);
773 isfinite(0.0);
774 isinf(0.0);
775 isnan(0.0);
776 isnormal(0.0);
777 signbit(0.0);
778 isgreater(0.0,0.0);
779 isgreaterequal(0.0,0.0);
780 isless(0.0,0.0);
781 islessequal(0.0,0.0);
782 islessgreater(0.0,0.0);
783 islessgreater(0.0,0.0);
784 isunordered(0.0,0.0);
785 ],[ac_c99_math=yes], [ac_c99_math=no])
786 ])
787 AC_MSG_RESULT($ac_c99_math)
788 if test x"$ac_c99_math" = x"yes"; then
789 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
790 [Define if C99 functions or macros in <math.h> should be imported
791 in <cmath> in namespace std.])
792 fi
793
794 # Check for the existence of <complex.h> complex math functions.
795 # This is necessary even though libstdc++ uses the builtin versions
796 # of these functions, because if the builtin cannot be used, a reference
797 # to the library function is emitted.
798 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
799 ac_c99_complex=no;
800 if test x"$ac_has_complex_h" = x"yes"; then
801 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
802 AC_TRY_COMPILE([#include <complex.h>],
803 [typedef __complex__ float float_type; float_type tmpf;
804 cabsf(tmpf);
805 cargf(tmpf);
806 ccosf(tmpf);
807 ccoshf(tmpf);
808 cexpf(tmpf);
809 clogf(tmpf);
810 csinf(tmpf);
811 csinhf(tmpf);
812 csqrtf(tmpf);
813 ctanf(tmpf);
814 ctanhf(tmpf);
815 cpowf(tmpf, tmpf);
816 typedef __complex__ double double_type; double_type tmpd;
817 cabs(tmpd);
818 carg(tmpd);
819 ccos(tmpd);
820 ccosh(tmpd);
821 cexp(tmpd);
822 clog(tmpd);
823 csin(tmpd);
824 csinh(tmpd);
825 csqrt(tmpd);
826 ctan(tmpd);
827 ctanh(tmpd);
828 cpow(tmpd, tmpd);
829 typedef __complex__ long double ld_type; ld_type tmpld;
830 cabsl(tmpld);
831 cargl(tmpld);
832 ccosl(tmpld);
833 ccoshl(tmpld);
834 cexpl(tmpld);
835 clogl(tmpld);
836 csinl(tmpld);
837 csinhl(tmpld);
838 csqrtl(tmpld);
839 ctanl(tmpld);
840 ctanhl(tmpld);
841 cpowl(tmpld, tmpld);
842 ],[ac_c99_complex=yes], [ac_c99_complex=no])
843 fi
844 AC_MSG_RESULT($ac_c99_complex)
845 if test x"$ac_c99_complex" = x"yes"; then
846 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
847 [Define if C99 functions in <complex.h> should be used in
848 <complex>. Using compiler builtins for these functions requires
849 corresponding C99 library functions to be present.])
850 fi
851
852 # Check for the existence in <stdio.h> of vscanf, et. al.
853 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
854 AC_CACHE_VAL(ac_c99_stdio, [
855 AC_TRY_COMPILE([#include <stdio.h>
856 #include <stdarg.h>
857 void foo(char* fmt, ...)
858 {
859 va_list args; va_start(args, fmt);
860 vfscanf(stderr, "%i", args);
861 vscanf("%i", args);
862 vsnprintf(fmt, 0, "%i", args);
863 vsscanf(fmt, "%i", args);
864 }],
865 [snprintf("12", 0, "%i");],
866 [ac_c99_stdio=yes], [ac_c99_stdio=no])
867 ])
868 AC_MSG_RESULT($ac_c99_stdio)
869
870 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
871 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
872 AC_CACHE_VAL(ac_c99_stdlib, [
873 AC_TRY_COMPILE([#include <stdlib.h>],
874 [char* tmp;
875 strtof("gnu", &tmp);
876 strtold("gnu", &tmp);
877 strtoll("gnu", &tmp, 10);
878 strtoull("gnu", &tmp, 10);
879 llabs(10);
880 lldiv(10,1);
881 atoll("10");
882 _Exit(0);
883 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
884 ])
885 AC_MSG_RESULT($ac_c99_stdlib)
886
887 # Check for the existence in <wchar.h> of wcstold, etc.
888 ac_c99_wchar=no;
889 if test x"$ac_has_wchar_h" = xyes &&
890 test x"$ac_has_wctype_h" = xyes; then
891 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
892 AC_TRY_COMPILE([#include <wchar.h>
893 namespace test
894 {
895 using ::wcstold;
896 using ::wcstoll;
897 using ::wcstoull;
898 }
899 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
900
901 # Checks for wide character functions that may not be present.
902 # Injection of these is wrapped with guard macros.
903 # NB: only put functions here, instead of immediately above, if
904 # absolutely necessary.
905 AC_TRY_COMPILE([#include <wchar.h>
906 namespace test { using ::vfwscanf; } ], [],
907 [AC_DEFINE(HAVE_VFWSCANF,1,
908 [Defined if vfwscanf exists.])],[])
909
910 AC_TRY_COMPILE([#include <wchar.h>
911 namespace test { using ::vswscanf; } ], [],
912 [AC_DEFINE(HAVE_VSWSCANF,1,
913 [Defined if vswscanf exists.])],[])
914
915 AC_TRY_COMPILE([#include <wchar.h>
916 namespace test { using ::vwscanf; } ], [],
917 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
918
919 AC_TRY_COMPILE([#include <wchar.h>
920 namespace test { using ::wcstof; } ], [],
921 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
922
923 AC_TRY_COMPILE([#include <wctype.h>],
924 [ wint_t t; int i = iswblank(t);],
925 [AC_DEFINE(HAVE_ISWBLANK,1,
926 [Defined if iswblank exists.])],[])
927
928 AC_MSG_RESULT($ac_c99_wchar)
929 fi
930
931 # Option parsed, now set things appropriately.
932 if test x"$ac_c99_math" = x"no" ||
933 test x"$ac_c99_complex" = x"no" ||
934 test x"$ac_c99_stdio" = x"no" ||
935 test x"$ac_c99_stdlib" = x"no" ||
936 test x"$ac_c99_wchar" = x"no"; then
937 enable_c99=no;
938 else
939 AC_DEFINE(_GLIBCXX_USE_C99, 1,
940 [Define if C99 functions or macros from <wchar.h>, <math.h>,
941 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
942 fi
943
944 AC_LANG_RESTORE
945 fi
946
947 AC_MSG_CHECKING([for fully enabled ISO C99 support])
948 AC_MSG_RESULT($enable_c99)
949 ])
950
951
952 dnl
953 dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
954 dnl facilities in Chapter 8, "C compatibility".
955 dnl
956 AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
957
958 AC_LANG_SAVE
959 AC_LANG_CPLUSPLUS
960
961 # Check for the existence of <complex.h> complex math functions used
962 # by tr1/complex.
963 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
964 ac_c99_complex_tr1=no;
965 if test x"$ac_has_complex_h" = x"yes"; then
966 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
967 AC_TRY_COMPILE([#include <complex.h>],
968 [typedef __complex__ float float_type; float_type tmpf;
969 cacosf(tmpf);
970 casinf(tmpf);
971 catanf(tmpf);
972 cacoshf(tmpf);
973 casinhf(tmpf);
974 catanhf(tmpf);
975 typedef __complex__ double double_type; double_type tmpd;
976 cacos(tmpd);
977 casin(tmpd);
978 catan(tmpd);
979 cacosh(tmpd);
980 casinh(tmpd);
981 catanh(tmpd);
982 typedef __complex__ long double ld_type; ld_type tmpld;
983 cacosl(tmpld);
984 casinl(tmpld);
985 catanl(tmpld);
986 cacoshl(tmpld);
987 casinhl(tmpld);
988 catanhl(tmpld);
989 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
990 fi
991 AC_MSG_RESULT($ac_c99_complex_tr1)
992 if test x"$ac_c99_complex_tr1" = x"yes"; then
993 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
994 [Define if C99 functions in <complex.h> should be used in
995 <tr1/complex>. Using compiler builtins for these functions
996 requires corresponding C99 library functions to be present.])
997 fi
998
999 # Check for the existence of <ctype.h> functions.
1000 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
1001 AC_CACHE_VAL(ac_c99_ctype_tr1, [
1002 AC_TRY_COMPILE([#include <ctype.h>],
1003 [int ch;
1004 int ret;
1005 ret = isblank(ch);
1006 ],[ac_c99_ctype_tr1=yes], [ac_c99_ctype_tr1=no])
1007 ])
1008 AC_MSG_RESULT($ac_c99_ctype_tr1)
1009 if test x"$ac_c99_ctype_tr1" = x"yes"; then
1010 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
1011 [Define if C99 functions in <ctype.h> should be imported in
1012 <tr1/cctype> in namespace std::tr1.])
1013 fi
1014
1015 # Check for the existence of <fenv.h> functions.
1016 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1017 ac_c99_fenv_tr1=no;
1018 if test x"$ac_has_fenv_h" = x"yes"; then
1019 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1020 AC_TRY_COMPILE([#include <fenv.h>],
1021 [int except, mode;
1022 fexcept_t* pflag;
1023 fenv_t* penv;
1024 int ret;
1025 ret = feclearexcept(except);
1026 ret = fegetexceptflag(pflag, except);
1027 ret = feraiseexcept(except);
1028 ret = fesetexceptflag(pflag, except);
1029 ret = fetestexcept(except);
1030 ret = fegetround();
1031 ret = fesetround(mode);
1032 ret = fegetenv(penv);
1033 ret = feholdexcept(penv);
1034 ret = fesetenv(penv);
1035 ret = feupdateenv(penv);
1036 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1037 fi
1038 AC_MSG_RESULT($ac_c99_fenv_tr1)
1039 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1040 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
1041 [Define if C99 functions in <fenv.h> should be imported in
1042 <tr1/cfenv> in namespace std::tr1.])
1043 fi
1044
1045 # Check for the existence of <stdint.h> types.
1046 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
1047 AC_CACHE_VAL(ac_c99_stdint_tr1, [
1048 AC_TRY_COMPILE([#include <stdint.h>],
1049 [typedef int8_t my_int8_t;
1050 typedef int16_t my_int16_t;
1051 typedef int32_t my_int32_t;
1052 typedef int64_t my_int64_t;
1053 typedef int_fast8_t my_int_fast8_t;
1054 typedef int_fast16_t my_int_fast16_t;
1055 typedef int_fast32_t my_int_fast32_t;
1056 typedef int_fast64_t my_int_fast64_t;
1057 typedef int_least8_t my_int_least8_t;
1058 typedef int_least16_t my_int_least16_t;
1059 typedef int_least32_t my_int_least32_t;
1060 typedef int_least64_t my_int_least64_t;
1061 typedef intmax_t my_intmax_t;
1062 typedef intptr_t my_intptr_t;
1063 typedef uint8_t my_uint8_t;
1064 typedef uint16_t my_uint16_t;
1065 typedef uint32_t my_uint32_t;
1066 typedef uint64_t my_uint64_t;
1067 typedef uint_fast8_t my_uint_fast8_t;
1068 typedef uint_fast16_t my_uint_fast16_t;
1069 typedef uint_fast32_t my_uint_fast32_t;
1070 typedef uint_fast64_t my_uint_fast64_t;
1071 typedef uint_least8_t my_uint_least8_t;
1072 typedef uint_least16_t my_uint_least16_t;
1073 typedef uint_least32_t my_uint_least32_t;
1074 typedef uint_least64_t my_uint_least64_t;
1075 typedef uintmax_t my_uintmax_t;
1076 typedef uintptr_t my_uintptr_t;
1077 ],[ac_c99_stdint_tr1=yes], [ac_c99_stdint_tr1=no])
1078 ])
1079 AC_MSG_RESULT($ac_c99_stdint_tr1)
1080 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1081 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
1082 [Define if C99 types in <stdint.h> should be imported in
1083 <tr1/cstdint> in namespace std::tr1.])
1084 fi
1085
1086 # Check for the existence of <math.h> functions.
1087 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
1088 AC_CACHE_VAL(ac_c99_math_tr1, [
1089 AC_TRY_COMPILE([#include <math.h>],
1090 [typedef double_t my_double_t;
1091 typedef float_t my_float_t;
1092 acosh(0.0);
1093 acoshf(0.0f);
1094 acoshl(0.0l);
1095 asinh(0.0);
1096 asinhf(0.0f);
1097 asinhl(0.0l);
1098 atanh(0.0);
1099 atanhf(0.0f);
1100 atanhl(0.0l);
1101 cbrt(0.0);
1102 cbrtf(0.0f);
1103 cbrtl(0.0l);
1104 copysign(0.0, 0.0);
1105 copysignf(0.0f, 0.0f);
1106 copysignl(0.0l, 0.0l);
1107 erf(0.0);
1108 erff(0.0f);
1109 erfl(0.0l);
1110 erfc(0.0);
1111 erfcf(0.0f);
1112 erfcl(0.0l);
1113 exp2(0.0);
1114 exp2f(0.0f);
1115 exp2l(0.0l);
1116 expm1(0.0);
1117 expm1f(0.0f);
1118 expm1l(0.0l);
1119 fdim(0.0, 0.0);
1120 fdimf(0.0f, 0.0f);
1121 fdiml(0.0l, 0.0l);
1122 fma(0.0, 0.0, 0.0);
1123 fmaf(0.0f, 0.0f, 0.0f);
1124 fmal(0.0l, 0.0l, 0.0l);
1125 fmax(0.0, 0.0);
1126 fmaxf(0.0f, 0.0f);
1127 fmaxl(0.0l, 0.0l);
1128 fmin(0.0, 0.0);
1129 fminf(0.0f, 0.0f);
1130 fminl(0.0l, 0.0l);
1131 hypot(0.0, 0.0);
1132 hypotf(0.0f, 0.0f);
1133 hypotl(0.0l, 0.0l);
1134 ilogb(0.0);
1135 ilogbf(0.0f);
1136 ilogbl(0.0l);
1137 lgamma(0.0);
1138 lgammaf(0.0f);
1139 lgammal(0.0l);
1140 llrint(0.0);
1141 llrintf(0.0f);
1142 llrintl(0.0l);
1143 llround(0.0);
1144 llroundf(0.0f);
1145 llroundl(0.0l);
1146 log1p(0.0);
1147 log1pf(0.0f);
1148 log1pl(0.0l);
1149 log2(0.0);
1150 log2f(0.0f);
1151 log2l(0.0l);
1152 logb(0.0);
1153 logbf(0.0f);
1154 logbl(0.0l);
1155 lrint(0.0);
1156 lrintf(0.0f);
1157 lrintl(0.0l);
1158 lround(0.0);
1159 lroundf(0.0f);
1160 lroundl(0.0l);
1161 nan(0);
1162 nanf(0);
1163 nanl(0);
1164 nearbyint(0.0);
1165 nearbyintf(0.0f);
1166 nearbyintl(0.0l);
1167 nextafter(0.0, 0.0);
1168 nextafterf(0.0f, 0.0f);
1169 nextafterl(0.0l, 0.0l);
1170 nexttoward(0.0, 0.0);
1171 nexttowardf(0.0f, 0.0f);
1172 nexttowardl(0.0l, 0.0l);
1173 remainder(0.0, 0.0);
1174 remainderf(0.0f, 0.0f);
1175 remainderl(0.0l, 0.0l);
1176 remquo(0.0, 0.0, 0);
1177 remquo(0.0f, 0.0f, 0);
1178 remquo(0.0l, 0.0l, 0);
1179 rint(0.0);
1180 rintf(0.0f);
1181 rintl(0.0l);
1182 round(0.0);
1183 roundf(0.0f);
1184 roundl(0.0l);
1185 scalbln(0.0, 0l);
1186 scalblnf(0.0f, 0l);
1187 scalblnl(0.0l, 0l);
1188 scalbn(0.0, 0);
1189 scalbnf(0.0f, 0);
1190 scalbnl(0.0l, 0);
1191 tgamma(0.0);
1192 tgammaf(0.0f);
1193 tgammal(0.0l);
1194 trunc(0.0);
1195 truncf(0.0f);
1196 truncl(0.0l);
1197 ],[ac_c99_math_tr1=yes], [ac_c99_math_tr1=no])
1198 ])
1199 AC_MSG_RESULT($ac_c99_math_tr1)
1200 if test x"$ac_c99_math_tr1" = x"yes"; then
1201 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
1202 [Define if C99 functions or macros in <math.h> should be imported
1203 in <tr1/cmath> in namespace std::tr1.])
1204 fi
1205
1206 # Check for the existence of <inttypes.h> functions (NB: doesn't make
1207 # sense if the previous check fails, per C99, 7.8/1).
1208 ac_c99_inttypes_tr1=no;
1209 if test x"$ac_c99_stdint_tr1" = x"yes"; then
1210 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1211 AC_TRY_COMPILE([#include <inttypes.h>],
1212 [intmax_t i, numer, denom, base;
1213 const char* s;
1214 char** endptr;
1215 intmax_t ret = imaxabs(i);
1216 imaxdiv_t dret = imaxdiv(numer, denom);
1217 ret = strtoimax(s, endptr, base);
1218 uintmax_t uret = strtoumax(s, endptr, base);
1219 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
1220 fi
1221 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1222 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1223 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
1224 [Define if C99 functions in <inttypes.h> should be imported in
1225 <tr1/cinttypes> in namespace std::tr1.])
1226 fi
1227
1228 # Check for the existence of the <stdbool.h> header.
1229 AC_CHECK_HEADERS(stdbool.h)
1230
1231 AC_LANG_RESTORE
1232 ])
1233
1234 dnl
1235 dnl Check whether "dev/random" and "dev/urandom" are available for the
1236 dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
1237 dnl
1238 AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
1239
1240 AC_MSG_CHECKING([for "dev/random" and "dev/urandom" for TR1 random_device])
1241 AC_CACHE_VAL(ac_random_tr1, [
1242 AC_TRY_RUN([#include <stdio.h>
1243 int main()
1244 {
1245 return !(fopen("/dev/random", "r")
1246 && fopen("/dev/urandom", "r"));
1247 }
1248 ],
1249 [ac_random_tr1=yes], [ac_random_tr1=no],
1250 [ac_random_tr1=no])
1251 ])
1252 AC_MSG_RESULT($ac_random_tr1)
1253 if test x"$ac_random_tr1" = x"yes"; then
1254 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
1255 [Define if dev/random and dev/urandom are available for
1256 the random_device of TR1 (Chapter 5.1).])
1257 fi
1258
1259 ])
1260
1261 dnl
1262 dnl Check for what type of C headers to use.
1263 dnl
1264 dnl --enable-cheaders= [does stuff].
1265 dnl --disable-cheaders [does not do anything, really].
1266 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1267 dnl Where DEFAULT is either `c' or `c_std'.
1268 dnl
1269 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1270 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1271 [construct "C" headers for g++], [permit c|c_std])
1272 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1273
1274 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1275
1276 AC_SUBST(C_INCLUDE_DIR)
1277 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1278 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1279 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1280 ])
1281
1282
1283 dnl
1284 dnl Check for which locale library to use. The choice is mapped to
1285 dnl a subdirectory of config/locale.
1286 dnl
1287 dnl Default is generic.
1288 dnl
1289 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1290 AC_MSG_CHECKING([for C locale to use])
1291 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1292 [use MODEL for target locale package],
1293 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1294
1295 # If they didn't use this option switch, or if they specified --enable
1296 # with no specific model, we'll have to look for one. If they
1297 # specified --disable (???), do likewise.
1298 if test $enable_clocale = no || test $enable_clocale = yes; then
1299 enable_clocale=auto
1300 fi
1301
1302 # Either a known package, or "auto"
1303 enable_clocale_flag=$enable_clocale
1304
1305 # Probe for locale support if no specific model is specified.
1306 # Default to "generic".
1307 if test $enable_clocale_flag = auto; then
1308 case ${target_os} in
1309 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1310 AC_EGREP_CPP([_GLIBCXX_ok], [
1311 #include <features.h>
1312 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1313 _GLIBCXX_ok
1314 #endif
1315 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1316
1317 # Test for bugs early in glibc-2.2.x series
1318 if test $enable_clocale_flag = gnu; then
1319 AC_TRY_RUN([
1320 #define _GNU_SOURCE 1
1321 #include <locale.h>
1322 #include <string.h>
1323 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1324 extern __typeof(newlocale) __newlocale;
1325 extern __typeof(duplocale) __duplocale;
1326 extern __typeof(strcoll_l) __strcoll_l;
1327 #endif
1328 int main()
1329 {
1330 const char __one[] = "Äuglein Augmen";
1331 const char __two[] = "Äuglein";
1332 int i;
1333 int j;
1334 __locale_t loc;
1335 __locale_t loc_dup;
1336 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1337 loc_dup = __duplocale(loc);
1338 i = __strcoll_l(__one, __two, loc);
1339 j = __strcoll_l(__one, __two, loc_dup);
1340 return 0;
1341 }
1342 ],
1343 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1344 [enable_clocale_flag=generic])
1345 fi
1346
1347 # ... at some point put __strxfrm_l tests in as well.
1348 ;;
1349 darwin* | freebsd*)
1350 enable_clocale_flag=darwin
1351 ;;
1352 *)
1353 enable_clocale_flag=generic
1354 ;;
1355 esac
1356 fi
1357
1358 # Deal with gettext issues. Default to not using it (=no) until we detect
1359 # support for it later. Let the user turn it off via --e/d, but let that
1360 # default to on for easier handling.
1361 USE_NLS=no
1362 AC_ARG_ENABLE(nls,
1363 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1364 [],
1365 [enable_nls=yes])
1366
1367 # Set configure bits for specified locale package
1368 case ${enable_clocale_flag} in
1369 generic)
1370 AC_MSG_RESULT(generic)
1371
1372 CLOCALE_H=config/locale/generic/c_locale.h
1373 CLOCALE_CC=config/locale/generic/c_locale.cc
1374 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1375 CCOLLATE_CC=config/locale/generic/collate_members.cc
1376 CCTYPE_CC=config/locale/generic/ctype_members.cc
1377 CMESSAGES_H=config/locale/generic/messages_members.h
1378 CMESSAGES_CC=config/locale/generic/messages_members.cc
1379 CMONEY_CC=config/locale/generic/monetary_members.cc
1380 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1381 CTIME_H=config/locale/generic/time_members.h
1382 CTIME_CC=config/locale/generic/time_members.cc
1383 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1384 ;;
1385 darwin)
1386 AC_MSG_RESULT(darwin or freebsd)
1387
1388 CLOCALE_H=config/locale/generic/c_locale.h
1389 CLOCALE_CC=config/locale/generic/c_locale.cc
1390 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1391 CCOLLATE_CC=config/locale/generic/collate_members.cc
1392 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1393 CMESSAGES_H=config/locale/generic/messages_members.h
1394 CMESSAGES_CC=config/locale/generic/messages_members.cc
1395 CMONEY_CC=config/locale/generic/monetary_members.cc
1396 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1397 CTIME_H=config/locale/generic/time_members.h
1398 CTIME_CC=config/locale/generic/time_members.cc
1399 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1400 ;;
1401
1402 gnu)
1403 AC_MSG_RESULT(gnu)
1404
1405 # Declare intention to use gettext, and add support for specific
1406 # languages.
1407 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1408 ALL_LINGUAS="de fr"
1409
1410 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1411 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1412 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1413 USE_NLS=yes
1414 fi
1415 # Export the build objects.
1416 for ling in $ALL_LINGUAS; do \
1417 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1418 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1419 done
1420 AC_SUBST(glibcxx_MOFILES)
1421 AC_SUBST(glibcxx_POFILES)
1422
1423 CLOCALE_H=config/locale/gnu/c_locale.h
1424 CLOCALE_CC=config/locale/gnu/c_locale.cc
1425 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1426 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1427 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1428 CMESSAGES_H=config/locale/gnu/messages_members.h
1429 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1430 CMONEY_CC=config/locale/gnu/monetary_members.cc
1431 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1432 CTIME_H=config/locale/gnu/time_members.h
1433 CTIME_CC=config/locale/gnu/time_members.cc
1434 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1435 ;;
1436 ieee_1003.1-2001)
1437 AC_MSG_RESULT(IEEE 1003.1)
1438
1439 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1440 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1441 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1442 CCOLLATE_CC=config/locale/generic/collate_members.cc
1443 CCTYPE_CC=config/locale/generic/ctype_members.cc
1444 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1445 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1446 CMONEY_CC=config/locale/generic/monetary_members.cc
1447 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1448 CTIME_H=config/locale/generic/time_members.h
1449 CTIME_CC=config/locale/generic/time_members.cc
1450 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1451 ;;
1452 esac
1453
1454 # This is where the testsuite looks for locale catalogs, using the
1455 # -DLOCALEDIR define during testsuite compilation.
1456 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1457 AC_SUBST(glibcxx_localedir)
1458
1459 # A standalone libintl (e.g., GNU libintl) may be in use.
1460 if test $USE_NLS = yes; then
1461 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1462 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1463 fi
1464 if test $USE_NLS = yes; then
1465 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1466 [Define if NLS translations are to be used.])
1467 fi
1468
1469 AC_SUBST(USE_NLS)
1470 AC_SUBST(CLOCALE_H)
1471 AC_SUBST(CMESSAGES_H)
1472 AC_SUBST(CCODECVT_CC)
1473 AC_SUBST(CCOLLATE_CC)
1474 AC_SUBST(CCTYPE_CC)
1475 AC_SUBST(CMESSAGES_CC)
1476 AC_SUBST(CMONEY_CC)
1477 AC_SUBST(CNUMERIC_CC)
1478 AC_SUBST(CTIME_H)
1479 AC_SUBST(CTIME_CC)
1480 AC_SUBST(CLOCALE_CC)
1481 AC_SUBST(CLOCALE_INTERNAL_H)
1482 ])
1483
1484
1485 dnl
1486 dnl Check for which std::allocator base class to use. The choice is
1487 dnl mapped from a subdirectory of include/ext.
1488 dnl
1489 dnl Default is new.
1490 dnl
1491 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1492 AC_MSG_CHECKING([for std::allocator base class])
1493 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1494 [use KIND for target std::allocator base],
1495 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1496
1497 # If they didn't use this option switch, or if they specified --enable
1498 # with no specific model, we'll have to look for one. If they
1499 # specified --disable (???), do likewise.
1500 if test $enable_libstdcxx_allocator = no ||
1501 test $enable_libstdcxx_allocator = yes;
1502 then
1503 enable_libstdcxx_allocator=auto
1504 fi
1505
1506 # Either a known package, or "auto". Auto implies the default choice
1507 # for a particular platform.
1508 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1509
1510 # Probe for host-specific support if no specific model is specified.
1511 # Default to "new".
1512 if test $enable_libstdcxx_allocator_flag = auto; then
1513 case ${target_os} in
1514 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1515 enable_libstdcxx_allocator_flag=new
1516 ;;
1517 *)
1518 enable_libstdcxx_allocator_flag=new
1519 ;;
1520 esac
1521 fi
1522 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1523
1524
1525 # Set configure bits for specified locale package
1526 case ${enable_libstdcxx_allocator_flag} in
1527 bitmap)
1528 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1529 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1530 ;;
1531 malloc)
1532 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1533 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1534 ;;
1535 mt)
1536 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1537 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1538 ;;
1539 new)
1540 ALLOCATOR_H=config/allocator/new_allocator_base.h
1541 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1542 ;;
1543 pool)
1544 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1545 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1546 ;;
1547 esac
1548
1549 AC_SUBST(ALLOCATOR_H)
1550 AC_SUBST(ALLOCATOR_NAME)
1551 ])
1552
1553
1554 dnl
1555 dnl Check for whether the Boost-derived checks should be turned on.
1556 dnl
1557 dnl --enable-concept-checks turns them on.
1558 dnl --disable-concept-checks leaves them off.
1559 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1560 dnl Where DEFAULT is either `yes' or `no'.
1561 dnl
1562 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1563 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1564 if test $enable_concept_checks = yes; then
1565 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1566 [Define to use concept checking code from the boost libraries.])
1567 fi
1568 ])
1569
1570
1571 dnl
1572 dnl Check for which I/O library to use: stdio, or something specific.
1573 dnl
1574 dnl Default is stdio.
1575 dnl
1576 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1577 AC_MSG_CHECKING([for underlying I/O to use])
1578 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1579 [use target-specific I/O package], [permit stdio])
1580
1581 # Now that libio has been removed, you can have any color you want as long
1582 # as it's black. This is one big no-op until other packages are added, but
1583 # showing the framework never hurts.
1584 case ${enable_cstdio} in
1585 stdio)
1586 CSTDIO_H=config/io/c_io_stdio.h
1587 BASIC_FILE_H=config/io/basic_file_stdio.h
1588 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1589 AC_MSG_RESULT(stdio)
1590 ;;
1591 esac
1592
1593 AC_SUBST(CSTDIO_H)
1594 AC_SUBST(BASIC_FILE_H)
1595 AC_SUBST(BASIC_FILE_CC)
1596 ])
1597
1598
1599 dnl
1600 dnl Check for "unusual" flags to pass to the compiler while building.
1601 dnl
1602 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1603 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1604 dnl --disable-cxx-flags passes nothing.
1605 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1606 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1607 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1608 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1609 dnl If "default flags" is an empty string, the effect is the same
1610 dnl as --disable or --enable=no.
1611 dnl
1612 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1613 AC_MSG_CHECKING([for extra compiler flags for building])
1614 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1615 [pass compiler FLAGS when building library],
1616 [case "x$enable_cxx_flags" in
1617 xno | x) enable_cxx_flags= ;;
1618 x-*) ;;
1619 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1620 esac])
1621
1622 # Run through flags (either default or command-line) and set anything
1623 # extra (e.g., #defines) that must accompany particular g++ options.
1624 if test -n "$enable_cxx_flags"; then
1625 for f in $enable_cxx_flags; do
1626 case "$f" in
1627 -fhonor-std) ;;
1628 -*) ;;
1629 *) # and we're trying to pass /what/ exactly?
1630 AC_MSG_ERROR([compiler flags start with a -]) ;;
1631 esac
1632 done
1633 fi
1634
1635 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1636 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1637 AC_SUBST(EXTRA_CXX_FLAGS)
1638 ])
1639
1640
1641 dnl
1642 dnl Check to see if debugging libraries are to be built.
1643 dnl
1644 dnl --enable-libstdcxx-debug
1645 dnl builds a separate set of debugging libraries in addition to the
1646 dnl normal (shared, static) libstdc++ binaries.
1647 dnl
1648 dnl --disable-libstdcxx-debug
1649 dnl builds only one (non-debug) version of libstdc++.
1650 dnl
1651 dnl --enable-libstdcxx-debug-flags=FLAGS
1652 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1653 dnl
1654 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1655 dnl Where DEFAULT is either `yes' or `no'.
1656 dnl
1657 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1658 AC_MSG_CHECKING([for additional debug build])
1659 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1660 AC_MSG_RESULT($enable_libstdcxx_debug)
1661 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1662 ])
1663
1664
1665 dnl
1666 dnl Check for explicit debug flags.
1667 dnl
1668 dnl --enable-libstdcxx-debug-flags='-O1'
1669 dnl is a general method for passing flags to be used when
1670 dnl building debug libraries with --enable-debug.
1671 dnl
1672 dnl --disable-libstdcxx-debug-flags does nothing.
1673 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1674 dnl If "default flags" is an empty string, the effect is the same
1675 dnl as --disable or --enable=no.
1676 dnl
1677 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1678 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1679 [pass compiler FLAGS when building debug library],
1680 [case "x$enable_libstdcxx_debug_flags" in
1681 xno | x) enable_libstdcxx_debug_flags= ;;
1682 x-*) ;;
1683 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1684 esac])
1685
1686 # Option parsed, now set things appropriately
1687 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1688 AC_SUBST(DEBUG_FLAGS)
1689
1690 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1691 ])
1692
1693
1694 dnl
1695 dnl Check if the user only wants a freestanding library implementation.
1696 dnl
1697 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1698 dnl installing only the headers required by [17.4.1.3] and the language
1699 dnl support library. More than that will be built (to keep the Makefiles
1700 dnl conveniently clean), but not installed.
1701 dnl
1702 dnl Sets:
1703 dnl is_hosted (yes/no)
1704 dnl
1705 dnl Defines:
1706 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1707 dnl
1708 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1709 AC_ARG_ENABLE([hosted-libstdcxx],
1710 AC_HELP_STRING([--disable-hosted-libstdcxx],
1711 [only build freestanding C++ runtime support]),,
1712 [case "$host" in
1713 arm*-*-symbianelf*)
1714 enable_hosted_libstdcxx=no
1715 ;;
1716 *)
1717 enable_hosted_libstdcxx=yes
1718 ;;
1719 esac])
1720 if test "$enable_hosted_libstdcxx" = no; then
1721 AC_MSG_NOTICE([Only freestanding libraries will be built])
1722 is_hosted=no
1723 hosted_define=0
1724 enable_abi_check=no
1725 enable_libstdcxx_pch=no
1726 else
1727 is_hosted=yes
1728 hosted_define=1
1729 fi
1730 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1731 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1732 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1733 ])
1734
1735
1736 dnl
1737 dnl Check for template specializations for the 'long long' type.
1738 dnl The result determines only whether 'long long' I/O is enabled; things
1739 dnl like numeric_limits<> specializations are always available.
1740 dnl
1741 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1742 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1743 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1744 dnl Where DEFAULT is either `yes' or `no'.
1745 dnl
1746 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1747 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1748 if test $enable_long_long = yes; then
1749 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1750 [Define if code specialized for long long should be used.])
1751 fi
1752 AC_MSG_CHECKING([for enabled long long specializations])
1753 AC_MSG_RESULT([$enable_long_long])
1754 ])
1755
1756
1757 dnl
1758 dnl Check for template specializations for the 'wchar_t' type.
1759 dnl
1760 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1761 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1762 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1763 dnl Where DEFAULT is either `yes' or `no'.
1764 dnl
1765 dnl Necessary support must also be present.
1766 dnl
1767 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1768 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1769
1770 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
1771 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
1772 AC_MSG_CHECKING([for mbstate_t])
1773 AC_TRY_COMPILE([#include <wchar.h>],
1774 [mbstate_t teststate;],
1775 have_mbstate_t=yes, have_mbstate_t=no)
1776 AC_MSG_RESULT($have_mbstate_t)
1777 if test x"$have_mbstate_t" = xyes; then
1778 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
1779 fi
1780
1781 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
1782 # ac_has_wchar_h.
1783 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
1784
1785 if test x"$enable_wchar_t" = x"yes"; then
1786
1787 AC_LANG_SAVE
1788 AC_LANG_CPLUSPLUS
1789
1790 if test x"$ac_has_wchar_h" = xyes &&
1791 test x"$ac_has_wctype_h" = xyes; then
1792 AC_TRY_COMPILE([#include <wchar.h>
1793 #include <stddef.h>
1794 wint_t i;
1795 long l = WEOF;
1796 long j = WCHAR_MIN;
1797 long k = WCHAR_MAX;
1798 namespace test
1799 {
1800 using ::btowc;
1801 using ::fgetwc;
1802 using ::fgetws;
1803 using ::fputwc;
1804 using ::fputws;
1805 using ::fwide;
1806 using ::fwprintf;
1807 using ::fwscanf;
1808 using ::getwc;
1809 using ::getwchar;
1810 using ::mbrlen;
1811 using ::mbrtowc;
1812 using ::mbsinit;
1813 using ::mbsrtowcs;
1814 using ::putwc;
1815 using ::putwchar;
1816 using ::swprintf;
1817 using ::swscanf;
1818 using ::ungetwc;
1819 using ::vfwprintf;
1820 using ::vswprintf;
1821 using ::vwprintf;
1822 using ::wcrtomb;
1823 using ::wcscat;
1824 using ::wcschr;
1825 using ::wcscmp;
1826 using ::wcscoll;
1827 using ::wcscpy;
1828 using ::wcscspn;
1829 using ::wcsftime;
1830 using ::wcslen;
1831 using ::wcsncat;
1832 using ::wcsncmp;
1833 using ::wcsncpy;
1834 using ::wcspbrk;
1835 using ::wcsrchr;
1836 using ::wcsrtombs;
1837 using ::wcsspn;
1838 using ::wcsstr;
1839 using ::wcstod;
1840 using ::wcstok;
1841 using ::wcstol;
1842 using ::wcstoul;
1843 using ::wcsxfrm;
1844 using ::wctob;
1845 using ::wmemchr;
1846 using ::wmemcmp;
1847 using ::wmemcpy;
1848 using ::wmemmove;
1849 using ::wmemset;
1850 using ::wprintf;
1851 using ::wscanf;
1852 }
1853 ],[],[], [enable_wchar_t=no])
1854 else
1855 enable_wchar_t=no
1856 fi
1857
1858 AC_LANG_RESTORE
1859 fi
1860
1861 if test x"$enable_wchar_t" = x"yes"; then
1862 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1863 [Define if code specialized for wchar_t should be used.])
1864 fi
1865
1866 AC_MSG_CHECKING([for enabled wchar_t specializations])
1867 AC_MSG_RESULT([$enable_wchar_t])
1868 ])
1869
1870
1871 dnl
1872 dnl Check to see if building and using a C++ precompiled header can be done.
1873 dnl
1874 dnl --enable-libstdcxx-pch=yes
1875 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1876 dnl may work, after some light-hearted attempts to puzzle out compiler
1877 dnl support, flip bits on in include/Makefile.am
1878 dnl
1879 dnl --disable-libstdcxx-pch
1880 dnl turns off attempts to use or build stdc++.h.gch.
1881 dnl
1882 dnl Substs:
1883 dnl glibcxx_PCHFLAGS
1884 dnl
1885 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1886 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1887 if test $enable_libstdcxx_pch = yes; then
1888 AC_CACHE_CHECK([for compiler with PCH support],
1889 [glibcxx_cv_prog_CXX_pch],
1890 [ac_save_CXXFLAGS="$CXXFLAGS"
1891 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1892 AC_LANG_SAVE
1893 AC_LANG_CPLUSPLUS
1894 echo '#include <math.h>' > conftest.h
1895 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1896 -o conftest.h.gch 1>&5 2>&1 &&
1897 echo '#error "pch failed"' > conftest.h &&
1898 echo '#include "conftest.h"' > conftest.cc &&
1899 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1900 then
1901 glibcxx_cv_prog_CXX_pch=yes
1902 else
1903 glibcxx_cv_prog_CXX_pch=no
1904 fi
1905 rm -f conftest*
1906 CXXFLAGS=$ac_save_CXXFLAGS
1907 AC_LANG_RESTORE
1908 ])
1909 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1910 fi
1911
1912 AC_MSG_CHECKING([for enabled PCH])
1913 AC_MSG_RESULT([$enable_libstdcxx_pch])
1914
1915 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1916 if test $enable_libstdcxx_pch = yes; then
1917 glibcxx_PCHFLAGS="-include bits/stdtr1c++.h"
1918 else
1919 glibcxx_PCHFLAGS=""
1920 fi
1921 AC_SUBST(glibcxx_PCHFLAGS)
1922 ])
1923
1924
1925 dnl
1926 dnl Check for atomic builtins.
1927 dnl See:
1928 dnl http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html#Atomic-Builtins
1929 dnl
1930 dnl This checks to see if the host supports the compiler-generated
1931 dnl builtins for atomic operations. Note, this is intended to be an
1932 dnl all-or-nothing switch, so all the atomic operations that are used
1933 dnl should be checked.
1934 dnl
1935 dnl Note:
1936 dnl libgomp and libgfortran do this with a link test, instead of an asm test.
1937 dnl see: CHECK_SYNC_FETCH_AND_ADD
1938 dnl
1939 dnl Defines:
1940 dnl _GLIBCXX_ATOMIC_BUILTINS if the compiler on this target supports atomics.
1941 dnl
1942 AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
1943 AC_MSG_CHECKING([for atomic builtins])
1944 AC_LANG_SAVE
1945 AC_LANG_CPLUSPLUS
1946
1947 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1948 cat > conftest.$ac_ext << EOF
1949 [#]line __oline__ "configure"
1950 int main()
1951 {
1952 // NB: _Atomic_word not necessarily int.
1953 typedef int atomic_type;
1954 atomic_type c1;
1955 atomic_type c2;
1956 const atomic_type c3(0);
1957 if (__sync_fetch_and_add(&c1, c2) == c3)
1958 {
1959 // Do something.
1960 }
1961 return 0;
1962 }
1963 EOF
1964 old_CXXFLAGS="$CXXFLAGS"
1965 CXXFLAGS=-S
1966 if AC_TRY_EVAL(ac_compile); then
1967 if grep __sync_fetch_and_add conftest.s >/dev/null 2>&1 ; then
1968 enable_atomic_builtins=no
1969 else
1970 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
1971 [Define if builtin atomic operations are supported on this host.])
1972 enable_atomic_builtins=yes
1973 atomicity_dir=cpu/generic/atomicity_builtins
1974 fi
1975 fi
1976 CXXFLAGS="$old_CXXFLAGS"
1977 rm -f conftest*
1978
1979 # Now, if still generic, set to mutex.
1980 if test $atomicity_dir = "cpu/generic" ; then
1981 atomicity_dir=cpu/generic/atomicity_mutex
1982 fi
1983 AC_LANG_RESTORE
1984 AC_MSG_RESULT($enable_atomic_builtins)
1985 ])
1986
1987
1988 dnl
1989 dnl Check for exception handling support. If an explicit enable/disable
1990 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1991 dnl target may or may not support call frame exceptions.
1992 dnl
1993 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1994 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1995 dnl Neither one forces an attempt at detection.
1996 dnl
1997 dnl Defines:
1998 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1999 dnl
2000 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
2001 AC_MSG_CHECKING([for exception model to use])
2002 AC_LANG_SAVE
2003 AC_LANG_CPLUSPLUS
2004 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
2005 [force use of builtin_setjmp for exceptions],
2006 [permit yes|no|auto])
2007
2008 if test $enable_sjlj_exceptions = auto; then
2009 # Botheration. Now we've got to detect the exception model. Link tests
2010 # against libgcc.a are problematic since we've not been given proper -L
2011 # bits for single-tree newlib and libgloss.
2012 #
2013 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
2014 cat > conftest.$ac_ext << EOF
2015 [#]line __oline__ "configure"
2016 struct S { ~S(); };
2017 void bar();
2018 void foo()
2019 {
2020 S s;
2021 bar();
2022 }
2023 EOF
2024 old_CXXFLAGS="$CXXFLAGS"
2025 CXXFLAGS=-S
2026 if AC_TRY_EVAL(ac_compile); then
2027 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
2028 enable_sjlj_exceptions=yes
2029 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
2030 enable_sjlj_exceptions=no
2031 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
2032 enable_sjlj_exceptions=no
2033 fi
2034 fi
2035 CXXFLAGS="$old_CXXFLAGS"
2036 rm -f conftest*
2037 fi
2038
2039 # This is a tad weird, for hysterical raisins. We have to map
2040 # enable/disable to two different models.
2041 case $enable_sjlj_exceptions in
2042 yes)
2043 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
2044 [Define if the compiler is configured for setjmp/longjmp exceptions.])
2045 ac_exception_model_name=sjlj
2046 ;;
2047 no)
2048 ac_exception_model_name="call frame"
2049 ;;
2050 *)
2051 AC_MSG_ERROR([unable to detect exception model])
2052 ;;
2053 esac
2054 AC_LANG_RESTORE
2055 AC_MSG_RESULT($ac_exception_model_name)
2056 ])
2057
2058
2059 dnl
2060 dnl Allow visibility attributes to be used on namespaces, objects, etc.
2061 dnl
2062 dnl --enable-visibility enables attempt to use visibility attributes.
2063 dnl --disable-visibility turns off all use of visibility attributes.
2064 dnl + Usage: GLIBCXX_ENABLE_VISIBILITY[(DEFAULT)]
2065 dnl Where DEFAULT is 'yes'.
2066 dnl
2067 AC_DEFUN([GLIBCXX_ENABLE_VISIBILITY], [
2068 GLIBCXX_ENABLE(visibility,$1,,[enables visibility safe usage])
2069
2070 if test x$enable_visibility = xyes ; then
2071 dnl all hail libgfortran
2072 dnl Check whether the target supports hidden visibility.
2073 AC_CACHE_CHECK([whether the target supports hidden visibility],
2074 have_attribute_visibility, [
2075 save_CFLAGS="$CFLAGS"
2076 CFLAGS="$CFLAGS -Werror"
2077 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
2078 [], have_attribute_visibility=yes,
2079 have_attribute_visibility=no)
2080 CFLAGS="$save_CFLAGS"])
2081 if test $have_attribute_visibility = no; then
2082 enable_visibility=no
2083 fi
2084 fi
2085
2086 GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_visibility = yes)
2087 AC_MSG_NOTICE([visibility supported: $enable_visibility])
2088 ])
2089
2090
2091 dnl
2092 dnl Add version tags to symbols in shared library (or not), additionally
2093 dnl marking other symbols as private/local (or not).
2094 dnl
2095 dnl --enable-symvers=style adds a version script to the linker call when
2096 dnl creating the shared library. The choice of version script is
2097 dnl controlled by 'style'.
2098 dnl --disable-symvers does not.
2099 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
2100 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
2101 dnl choose a default style based on linker characteristics. Passing
2102 dnl 'no' disables versioning.
2103 dnl
2104 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
2105
2106 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
2107 [enables symbol versioning of the shared library],
2108 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export])
2109
2110 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
2111 # don't know enough about $LD to do tricks...
2112 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
2113
2114 # Turn a 'yes' into a suitable default.
2115 if test x$enable_symvers = xyes ; then
2116 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
2117 enable_symvers=no
2118 else
2119 if test $with_gnu_ld = yes ; then
2120 enable_symvers=gnu
2121 else
2122 case ${target_os} in
2123 darwin*)
2124 enable_symvers=darwin ;;
2125 *)
2126 enable_symvers=no ;;
2127 esac
2128 fi
2129 fi
2130 fi
2131
2132 # Check to see if 'darwin' or 'darwin-export' can win.
2133 if test x$enable_symvers = xdarwin-export ; then
2134 enable_symvers=darwin
2135 fi
2136
2137 # Check to see if 'gnu' can win.
2138 if test $enable_symvers = gnu || test $enable_symvers = gnu-versioned-namespace; then
2139 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2140 AC_MSG_CHECKING([for shared libgcc])
2141 ac_save_CFLAGS="$CFLAGS"
2142 CFLAGS=' -lgcc_s'
2143 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2144 CFLAGS="$ac_save_CFLAGS"
2145 if test $glibcxx_shared_libgcc = no; then
2146 cat > conftest.c <<EOF
2147 int main (void) { return 0; }
2148 EOF
2149 changequote(,)dnl
2150 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
2151 -shared -shared-libgcc -o conftest.so \
2152 conftest.c -v 2>&1 >/dev/null \
2153 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
2154 changequote([,])dnl
2155 rm -f conftest.c conftest.so
2156 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
2157 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
2158 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
2159 CFLAGS="$ac_save_CFLAGS"
2160 fi
2161 fi
2162 AC_MSG_RESULT($glibcxx_shared_libgcc)
2163
2164 # For GNU ld, we need at least this version. The format is described in
2165 # GLIBCXX_CHECK_LINKER_FEATURES above.
2166 glibcxx_min_gnu_ld_version=21400
2167
2168 # If no shared libgcc, can't win.
2169 if test $glibcxx_shared_libgcc != yes; then
2170 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2171 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
2172 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2173 enable_symvers=no
2174 elif test $with_gnu_ld != yes ; then
2175 # just fail for now
2176 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
2177 AC_MSG_WARN([=== you are not using the GNU linker.])
2178 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2179 enable_symvers=no
2180 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
2181 # The right tools, the right setup, but too old. Fallbacks?
2182 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
2183 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
2184 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
2185 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
2186 AC_MSG_WARN([=== Symbol versioning will be disabled.])
2187 enable_symvers=no
2188 fi
2189 fi
2190
2191 # Everything parsed; figure out what file to use.
2192 case $enable_symvers in
2193 no)
2194 SYMVER_FILE=config/abi/pre/none.ver
2195 ;;
2196 gnu)
2197 SYMVER_FILE=config/abi/pre/gnu.ver
2198 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
2199 [Define to use GNU versioning in the shared library.])
2200 ;;
2201 gnu-versioned-namespace)
2202 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
2203 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
2204 [Define to use GNU namespace versioning in the shared library.])
2205 ;;
2206 darwin)
2207 SYMVER_FILE=config/abi/pre/gnu.ver
2208 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
2209 [Define to use darwin versioning in the shared library.])
2210 ;;
2211 esac
2212
2213 if test x$enable_symvers != xno ; then
2214 AC_DEFINE(_GLIBCXX_SYMVER, 1,
2215 [Define to use symbol versioning in the shared library.])
2216 fi
2217
2218 AC_SUBST(SYMVER_FILE)
2219 AC_SUBST(port_specific_symbol_files)
2220 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
2221 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
2222 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
2223 GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
2224 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
2225
2226 # Now, set up compatibility support, if any.
2227 # In addition, need this to deal with std::size_t mangling in
2228 # src/compatibility.cc. In a perfect world, could use
2229 # typeid(std::size_t).name()[0] to do direct substitution.
2230 AC_MSG_CHECKING([for size_t as unsigned int])
2231 ac_save_CFLAGS="$CFLAGS"
2232 CFLAGS="-Werror"
2233 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
2234 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
2235 CFLAGS=$ac_save_CFLAGS
2236 if test "$glibcxx_size_t_is_i" = yes; then
2237 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
2238 fi
2239 AC_MSG_RESULT([$glibcxx_size_t_is_i])
2240
2241 AC_MSG_CHECKING([for ptrdiff_t as int])
2242 ac_save_CFLAGS="$CFLAGS"
2243 CFLAGS="-Werror"
2244 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
2245 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
2246 CFLAGS=$ac_save_CFLAGS
2247 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
2248 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
2249 fi
2250 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
2251 ])
2252
2253
2254 dnl
2255 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
2256 dnl We must stage the required headers so that they will be installed
2257 dnl with the library (unlike libgcc, the STL implementation is provided
2258 dnl solely within headers). Since we must not inject random user-space
2259 dnl macro names into user-provided C++ code, we first stage into <file>-in
2260 dnl and process to <file> with an output command. The reason for a two-
2261 dnl stage process here is to correctly handle $srcdir!=$objdir without
2262 dnl having to write complex code (the sed commands to clean the macro
2263 dnl namespace are complex and fragile enough as it is). We must also
2264 dnl add a relative path so that -I- is supported properly.
2265 dnl
2266 dnl Substs:
2267 dnl glibcxx_thread_h
2268 dnl
2269 dnl Defines:
2270 dnl HAVE_GTHR_DEFAULT
2271 dnl
2272 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
2273 AC_MSG_CHECKING([for thread model used by GCC])
2274 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
2275 AC_MSG_RESULT([$target_thread_file])
2276
2277 if test $target_thread_file != single; then
2278 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
2279 [Define if gthr-default.h exists
2280 (meaning that threading support is enabled).])
2281 fi
2282
2283 glibcxx_thread_h=gthr-$target_thread_file.h
2284
2285 dnl Check for __GTHREADS define.
2286 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
2287 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
2288 enable_thread=yes
2289 else
2290 enable_thread=no
2291 fi
2292
2293 AC_SUBST(glibcxx_thread_h)
2294 ])
2295
2296
2297 # Check whether LC_MESSAGES is available in <locale.h>.
2298 # Ulrich Drepper <drepper@cygnus.com>, 1995.
2299 #
2300 # This file file be copied and used freely without restrictions. It can
2301 # be used in projects which are not available under the GNU Public License
2302 # but which still want to provide support for the GNU gettext functionality.
2303 # Please note that the actual code is *not* freely available.
2304
2305 # serial 1
2306 AC_DEFUN([AC_LC_MESSAGES], [
2307 AC_CHECK_HEADER(locale.h, [
2308 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
2309 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
2310 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
2311 if test $ac_cv_val_LC_MESSAGES = yes; then
2312 AC_DEFINE(HAVE_LC_MESSAGES, 1,
2313 [Define if LC_MESSAGES is available in <locale.h>.])
2314 fi
2315 ])
2316 ])
2317
2318 # Macros from the top-level gcc directory.
2319 m4_include([../config/tls.m4])
2320