| blob | d3156f2b2c434f19998cb182f5e5d76405545a66 |
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 # Find platform-specific directories containing configuration info.
129 # Also possibly modify flags used elsewhere, as needed by the platform.
130 GLIBCXX_CHECK_HOST
131 ])
134 dnl
135 dnl Tests for newer compiler features, or features that are present in newer
136 dnl compiler versions but not older compiler versions still in use, should
137 dnl be placed here.
138 dnl
139 dnl Defines:
140 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
141 dnl new inlining code or the new system_header pragma will die on -Werror.
142 dnl Leave it out by default and use maint-mode to use it.
143 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
144 dnl compiler supports it and the user has not requested debug mode.
145 dnl
146 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
147 # All these tests are for C++; save the language and the compiler flags.
148 # The CXXFLAGS thing is suspicious, but based on similar bits previously
149 # found in GLIBCXX_CONFIGURE.
150 AC_LANG_SAVE
151 AC_LANG_CPLUSPLUS
152 ac_test_CXXFLAGS="${CXXFLAGS+set}"
153 ac_save_CXXFLAGS="$CXXFLAGS"
155 # Check for maintainer-mode bits.
156 if test x"$USE_MAINTAINER_MODE" = xno; then
157 WERROR=''
158 else
159 WERROR='-Werror'
160 fi
162 # Check for -ffunction-sections -fdata-sections
163 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
164 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
165 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
166 if test "$ac_test_CXXFLAGS" = set; then
167 CXXFLAGS="$ac_save_CXXFLAGS"
168 else
169 # this is the suspicious part
170 CXXFLAGS=''
171 fi
172 if test x"$ac_fdsections" = x"yes"; then
173 SECTION_FLAGS='-ffunction-sections -fdata-sections'
174 fi
175 AC_MSG_RESULT($ac_fdsections)
177 AC_LANG_RESTORE
178 AC_SUBST(WERROR)
179 AC_SUBST(SECTION_FLAGS)
180 ])
183 dnl
184 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
185 dnl the native linker is in use, all variables will be defined to something
186 dnl safe (like an empty string).
187 dnl
188 dnl Defines:
189 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
190 dnl OPT_LDFLAGS='-Wl,-O1' if possible
191 dnl LD (as a side effect of testing)
192 dnl Sets:
193 dnl with_gnu_ld
194 dnl glibcxx_gnu_ld_version (possibly)
195 dnl
196 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
197 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
198 dnl
199 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
200 # If we're not using GNU ld, then there's no point in even trying these
201 # tests. Check for that first. We should have already tested for gld
202 # by now (in libtool), but require it now just to be safe...
203 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
204 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
205 AC_REQUIRE([AC_PROG_LD])
206 AC_REQUIRE([AC_PROG_AWK])
208 # The name set by libtool depends on the version of libtool. Shame on us
209 # for depending on an impl detail, but c'est la vie. Older versions used
210 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
211 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
212 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
213 # set (hence we're using an older libtool), then set it.
214 if test x${with_gnu_ld+set} != xset; then
215 if test x${ac_cv_prog_gnu_ld+set} != xset; then
216 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
217 with_gnu_ld=no
218 else
219 with_gnu_ld=$ac_cv_prog_gnu_ld
220 fi
221 fi
223 # Start by getting the version number. I think the libtool test already
224 # does some of this, but throws away the result.
225 changequote(,)
226 ldver=`$LD --version 2>/dev/null | head -1 | \
227 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
228 changequote([,])
229 glibcxx_gnu_ld_version=`echo $ldver | \
230 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
232 # Set --gc-sections.
233 if test "$with_gnu_ld" = "notbroken"; then
234 # GNU ld it is! Joy and bunny rabbits!
236 # All these tests are for C++; save the language and the compiler flags.
237 # Need to do this so that g++ won't try to link in libstdc++
238 ac_test_CFLAGS="${CFLAGS+set}"
239 ac_save_CFLAGS="$CFLAGS"
240 CFLAGS='-x c++ -Wl,--gc-sections'
242 # Check for -Wl,--gc-sections
243 # XXX This test is broken at the moment, as symbols required for linking
244 # are now in libsupc++ (not built yet). In addition, this test has
245 # cored on solaris in the past. In addition, --gc-sections doesn't
246 # really work at the moment (keeps on discarding used sections, first
247 # .eh_frame and now some of the glibc sections for iconv).
248 # Bzzzzt. Thanks for playing, maybe next time.
249 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
250 AC_TRY_RUN([
251 int main(void)
252 {
253 try { throw 1; }
254 catch (...) { };
255 return 0;
256 }
257 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
258 if test "$ac_test_CFLAGS" = set; then
259 CFLAGS="$ac_save_CFLAGS"
260 else
261 # this is the suspicious part
262 CFLAGS=''
263 fi
264 if test "$ac_sectionLDflags" = "yes"; then
265 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
266 fi
267 AC_MSG_RESULT($ac_sectionLDflags)
268 fi
270 # Set linker optimization flags.
271 if test x"$with_gnu_ld" = x"yes"; then
272 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
273 fi
275 AC_SUBST(SECTION_LDFLAGS)
276 AC_SUBST(OPT_LDFLAGS)
277 ])
280 dnl
281 dnl Check to see if this target can enable the iconv specializations.
282 dnl If --disable-c-mbchar was given, no wchar_t specialization is enabled.
283 dnl (This must have been previously checked, along with the rest of C99
284 dnl support.) By default, iconv support is disabled.
285 dnl
286 dnl Defines:
287 dnl _GLIBCXX_USE_ICONV if all the bits are found.
288 dnl Substs:
289 dnl LIBICONV to a -l string containing the iconv library, if needed.
290 dnl
291 AC_DEFUN([GLIBCXX_CHECK_ICONV_SUPPORT], [
293 enable_iconv=no
294 # Only continue checking if the ISO C99 headers exist and support is on.
295 if test x"$enable_wchar_t" = xyes; then
297 # Use iconv for wchar_t to char conversions. As such, check for
298 # X/Open Portability Guide, version 2 features (XPG2).
299 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
300 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
302 # Check for existence of libiconv.a providing XPG2 wchar_t support.
303 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
304 ac_save_LIBS="$LIBS"
305 LIBS="$LIBS $LIBICONV"
306 AC_SUBST(LIBICONV)
308 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
309 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
311 LIBS="$ac_save_LIBS"
313 if test x"$ac_has_iconv_h" = xyes &&
314 test x"$ac_has_langinfo_h" = xyes &&
315 test x"$ac_XPG2funcs" = xyes;
316 then
317 AC_DEFINE([_GLIBCXX_USE_ICONV],1,
318 [Define if iconv and related functions exist and are usable.])
319 enable_iconv=yes
320 fi
321 fi
322 AC_MSG_CHECKING([for enabled iconv specializations])
323 AC_MSG_RESULT($enable_iconv)
324 ])
327 dnl
328 dnl Check for headers for, and arguments to, the setrlimit() function.
329 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
330 dnl
331 dnl Defines:
332 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
333 dnl various HAVE_LIMIT_* for individual limit names
334 dnl
335 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
336 AC_TRY_COMPILE(
337 [#include <unistd.h>
338 #include <sys/time.h>
339 #include <sys/resource.h>
340 ],
341 [ int f = RLIMIT_$1 ; ],
342 [glibcxx_mresult=1], [glibcxx_mresult=0])
343 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
344 [Only used in build directory testsuite_hooks.h.])
345 ])
347 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
348 setrlimit_have_headers=yes
349 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
350 [],
351 [setrlimit_have_headers=no])
352 # If don't have the headers, then we can't run the tests now, and we
353 # won't be seeing any of these during testsuite compilation.
354 if test $setrlimit_have_headers = yes; then
355 # Can't do these in a loop, else the resulting syntax is wrong.
356 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
357 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
358 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
359 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
360 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
362 # Check for rlimit, setrlimit.
363 AC_CACHE_VAL(ac_setrlimit, [
364 AC_TRY_COMPILE(
365 [#include <unistd.h>
366 #include <sys/time.h>
367 #include <sys/resource.h>
368 ],
369 [struct rlimit r;
370 setrlimit(0, &r);],
371 [ac_setrlimit=yes], [ac_setrlimit=no])
372 ])
373 fi
375 AC_MSG_CHECKING([for testsuite resource limits support])
376 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
377 ac_res_limits=yes
378 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
379 [Define if using setrlimit to set resource limits during
380 "make check"])
381 else
382 ac_res_limits=no
383 fi
384 AC_MSG_RESULT($ac_res_limits)
385 ])
388 dnl
389 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
390 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
391 dnl
392 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
393 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
394 AC_TRY_LINK(
395 [#include <sys/stat.h>],
396 [struct stat buffer;
397 fstat(0, &buffer);
398 S_ISREG(buffer.st_mode);],
399 [glibcxx_cv_S_ISREG=yes],
400 [glibcxx_cv_S_ISREG=no])
401 ])
402 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
403 AC_TRY_LINK(
404 [#include <sys/stat.h>],
405 [struct stat buffer;
406 fstat(0, &buffer);
407 S_IFREG & buffer.st_mode;],
408 [glibcxx_cv_S_IFREG=yes],
409 [glibcxx_cv_S_IFREG=no])
410 ])
411 if test $glibcxx_cv_S_ISREG = yes; then
412 AC_DEFINE(HAVE_S_ISREG, 1,
413 [Define if S_IFREG is available in <sys/stat.h>.])
414 elif test $glibcxx_cv_S_IFREG = yes; then
415 AC_DEFINE(HAVE_S_IFREG, 1,
416 [Define if S_IFREG is available in <sys/stat.h>.])
417 fi
418 ])
421 dnl
422 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
423 dnl
424 AC_DEFUN([GLIBCXX_CHECK_POLL], [
425 AC_CACHE_VAL(glibcxx_cv_POLL, [
426 AC_TRY_LINK(
427 [#include <poll.h>],
428 [struct pollfd pfd[1];
429 pfd[0].events = POLLIN;
430 poll(pfd, 1, 0);],
431 [glibcxx_cv_POLL=yes],
432 [glibcxx_cv_POLL=no])
433 ])
434 if test $glibcxx_cv_POLL = yes; then
435 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
436 fi
437 ])
440 dnl
441 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
442 dnl
443 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
444 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
445 AC_TRY_LINK(
446 [#include <sys/uio.h>],
447 [struct iovec iov[2];
448 writev(0, iov, 0);],
449 [glibcxx_cv_WRITEV=yes],
450 [glibcxx_cv_WRITEV=no])
451 ])
452 if test $glibcxx_cv_WRITEV = yes; then
453 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
454 fi
455 ])
458 dnl
459 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
460 dnl
461 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
462 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
463 AC_TRY_COMPILE(
464 [#include <stdint.h>],
465 [int64_t var;],
466 [glibcxx_cv_INT64_T=yes],
467 [glibcxx_cv_INT64_T=no])
468 ])
469 if test $glibcxx_cv_INT64_T = yes; then
470 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
471 fi
472 ])
475 dnl
476 dnl Check whether LFS support is available.
477 dnl
478 AC_DEFUN([GLIBCXX_CHECK_LFS], [
479 AC_LANG_SAVE
480 AC_LANG_CPLUSPLUS
481 ac_save_CXXFLAGS="$CXXFLAGS"
482 CXXFLAGS="$CXXFLAGS -fno-exceptions"
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 $glibcxx_cv_LFS = yes; then
500 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
501 fi
502 CXXFLAGS="$ac_save_CXXFLAGS"
503 AC_LANG_RESTORE
504 ])
507 dnl
508 dnl Check for whether a fully dynamic basic_string implementation should
509 dnl be turned on, that does not put empty objects in per-process static
510 dnl memory (mostly useful together with shared memory allocators, see PR
511 dnl libstdc++/16612 for details).
512 dnl
513 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
514 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
515 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
516 dnl Where DEFAULT is either `yes' or `no'.
517 dnl
518 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
519 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
520 if test $enable_fully_dynamic_string = yes; then
521 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
522 [Define if a fully dynamic basic_string is wanted.])
523 fi
524 ])
527 dnl
528 dnl Does any necessary configuration of the testsuite directory. Generates
529 dnl the testsuite_hooks.h header.
530 dnl
531 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
532 dnl
533 dnl Sets:
534 dnl enable_abi_check
535 dnl GLIBCXX_TEST_WCHAR_T
536 dnl GLIBCXX_TEST_THREAD
537 dnl Substs:
538 dnl baseline_dir
539 dnl
540 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
541 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
542 test $enable_symvers != no; then
543 # Do checks for resource limit functions.
544 GLIBCXX_CHECK_SETRLIMIT
546 # Look for setenv, so that extended locale tests can be performed.
547 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
549 if test $enable_symvers = no; then
550 enable_abi_check=no
551 else
552 case "$host" in
553 *-*-cygwin*)
554 enable_abi_check=no ;;
555 *)
556 enable_abi_check=yes ;;
557 esac
558 fi
559 else
560 # Only build this as native, since automake does not understand
561 # CXX_FOR_BUILD.
562 enable_abi_check=no
563 fi
565 # Export file names for ABI checking.
566 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
567 AC_SUBST(baseline_dir)
568 ])
571 dnl
572 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
573 dnl
574 dnl Substs:
575 dnl GLIBCXX_INCLUDES
576 dnl TOPLEVEL_INCLUDES
577 dnl
578 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
579 # Used for every C++ compile we perform.
580 GLIBCXX_INCLUDES="\
581 -I$glibcxx_builddir/include/$host_alias \
582 -I$glibcxx_builddir/include \
583 -I$glibcxx_srcdir/libsupc++"
585 # For Canadian crosses, pick this up too.
586 if test $CANADIAN = yes; then
587 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
588 fi
590 # Stuff in the actual top level. Currently only used by libsupc++ to
591 # get unwind* headers from the gcc dir.
592 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
593 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
595 # Now, export this to all the little Makefiles....
596 AC_SUBST(GLIBCXX_INCLUDES)
597 AC_SUBST(TOPLEVEL_INCLUDES)
598 ])
601 dnl
602 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
603 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
604 dnl
605 dnl Substs:
606 dnl OPTIMIZE_CXXFLAGS
607 dnl WARN_FLAGS
608 dnl
609 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
610 # Optimization flags that are probably a good idea for thrill-seekers. Just
611 # uncomment the lines below and make, everything else is ready to go...
612 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
613 OPTIMIZE_CXXFLAGS=
614 AC_SUBST(OPTIMIZE_CXXFLAGS)
616 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
617 AC_SUBST(WARN_FLAGS)
618 ])
621 dnl
622 dnl All installation directory information is determined here.
623 dnl
624 dnl Substs:
625 dnl gxx_install_dir
626 dnl glibcxx_prefixdir
627 dnl glibcxx_toolexecdir
628 dnl glibcxx_toolexeclibdir
629 dnl
630 dnl Assumes cross_compiling bits already done, and with_cross_host in
631 dnl particular.
632 dnl
633 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
634 glibcxx_toolexecdir=no
635 glibcxx_toolexeclibdir=no
636 glibcxx_prefixdir=$prefix
638 AC_MSG_CHECKING([for gxx-include-dir])
639 AC_ARG_WITH([gxx-include-dir],
640 AC_HELP_STRING([--with-gxx-include-dir=DIR],
641 [installation directory for include files]),
642 [case "$withval" in
643 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
644 no) gxx_include_dir=no ;;
645 *) gxx_include_dir=$withval ;;
646 esac],
647 [gxx_include_dir=no])
648 AC_MSG_RESULT($gxx_include_dir)
650 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
651 AC_ARG_ENABLE([version-specific-runtime-libs],
652 AC_HELP_STRING([--enable-version-specific-runtime-libs],
653 [Specify that runtime libraries should be installed in a compiler-specific directory]),
654 [case "$enableval" in
655 yes) version_specific_libs=yes ;;
656 no) version_specific_libs=no ;;
657 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
658 esac],
659 [version_specific_libs=no])
660 AC_MSG_RESULT($version_specific_libs)
662 # Default case for install directory for include files.
663 if test $version_specific_libs = no && test $gxx_include_dir = no; then
664 gxx_include_dir='${prefix}/include/c++/${gcc_version}'
665 fi
667 # Version-specific runtime libs processing.
668 if test $version_specific_libs = yes; then
669 # Need the gcc compiler version to know where to install libraries
670 # and header files if --enable-version-specific-runtime-libs option
671 # is selected. FIXME: these variables are misnamed, there are
672 # no executables installed in _toolexecdir or _toolexeclibdir.
673 if test x"$gxx_include_dir" = x"no"; then
674 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
675 fi
676 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
677 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
678 fi
680 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
681 # Install a library built with a cross compiler in tooldir, not libdir.
682 if test x"$glibcxx_toolexecdir" = x"no"; then
683 if test -n "$with_cross_host" &&
684 test x"$with_cross_host" != x"no"; then
685 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
686 glibcxx_toolexeclibdir='${toolexecdir}/lib'
687 else
688 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
689 glibcxx_toolexeclibdir='${libdir}'
690 fi
691 multi_os_directory=`$CXX -print-multi-os-directory`
692 case $multi_os_directory in
693 .) ;; # Avoid trailing /.
694 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
695 esac
696 fi
698 AC_MSG_CHECKING([for install location])
699 AC_MSG_RESULT($gxx_include_dir)
701 AC_SUBST(glibcxx_prefixdir)
702 AC_SUBST(gxx_include_dir)
703 AC_SUBST(glibcxx_toolexecdir)
704 AC_SUBST(glibcxx_toolexeclibdir)
705 ])
708 dnl
709 dnl GLIBCXX_ENABLE
710 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
711 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
712 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
713 dnl
714 dnl See docs/html/17_intro/configury.html#enable for documentation.
715 dnl
716 m4_define([GLIBCXX_ENABLE],[dnl
717 m4_define([_g_switch],[--enable-$1])dnl
718 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
719 AC_ARG_ENABLE($1,_g_help,
720 m4_bmatch([$5],
721 [^permit ],
722 [[
723 case "$enableval" in
724 m4_bpatsubst([$5],[permit ])) ;;
725 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
726 dnl Idea for future: generate a URL pointing to
727 dnl "onlinedocs/configopts.html#whatever"
728 esac
729 ]],
730 [^$],
731 [[
732 case "$enableval" in
733 yes|no) ;;
734 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
735 esac
736 ]],
737 [[$5]]),
738 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
739 m4_undefine([_g_switch])dnl
740 m4_undefine([_g_help])dnl
741 ])
744 dnl
745 dnl Check for ISO/IEC 9899:1999 "C99" support.
746 dnl
747 dnl --enable-c99 defines _GLIBCXX_USE_C99
748 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
749 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
750 dnl Where DEFAULT is either `yes' or `no'.
751 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
752 dnl
753 AC_DEFUN([GLIBCXX_ENABLE_C99], [
754 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
756 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos
757 # even if C99 support is turned off.
758 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
759 AC_MSG_CHECKING([for mbstate_t])
760 AC_TRY_COMPILE([#include <wchar.h>],
761 [mbstate_t teststate;],
762 have_mbstate_t=yes, have_mbstate_t=no)
763 AC_MSG_RESULT($have_mbstate_t)
764 if test x"$have_mbstate_t" = xyes; then
765 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
766 fi
768 if test x"$enable_c99" = x"yes"; then
770 AC_LANG_SAVE
771 AC_LANG_CPLUSPLUS
773 # Check for the existence of <math.h> functions used if C99 is enabled.
774 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
775 AC_CACHE_VAL(ac_c99_math, [
776 AC_TRY_COMPILE([#include <math.h>],
777 [fpclassify(0.0);
778 isfinite(0.0);
779 isinf(0.0);
780 isnan(0.0);
781 isnormal(0.0);
782 signbit(0.0);
783 isgreater(0.0,0.0);
784 isgreaterequal(0.0,0.0);
785 isless(0.0,0.0);
786 islessequal(0.0,0.0);
787 islessgreater(0.0,0.0);
788 islessgreater(0.0,0.0);
789 isunordered(0.0,0.0);
790 ],[ac_c99_math=yes], [ac_c99_math=no])
791 ])
792 AC_MSG_RESULT($ac_c99_math)
793 if test x"$ac_c99_math" = x"yes"; then
794 AC_DEFINE(_GLIBCXX_USE_C99_MATH, 1,
795 [Define if C99 functions or macros in <math.h> should be imported
796 in <cmath> in namespace std.])
797 fi
799 # Check for the existence of <complex.h> complex math functions.
800 # This is necessary even though libstdc++ uses the builtin versions
801 # of these functions, because if the builtin cannot be used, a reference
802 # to the library function is emitted.
803 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
804 ac_c99_complex=no;
805 if test x"$ac_has_complex_h" = x"yes"; then
806 AC_MSG_CHECKING([for ISO C99 support in <complex.h>])
807 AC_TRY_COMPILE([#include <complex.h>],
808 [typedef __complex__ float float_type; float_type tmpf;
809 cabsf(tmpf);
810 cargf(tmpf);
811 ccosf(tmpf);
812 ccoshf(tmpf);
813 cexpf(tmpf);
814 clogf(tmpf);
815 csinf(tmpf);
816 csinhf(tmpf);
817 csqrtf(tmpf);
818 ctanf(tmpf);
819 ctanhf(tmpf);
820 cpowf(tmpf, tmpf);
821 typedef __complex__ double double_type; double_type tmpd;
822 cabs(tmpd);
823 carg(tmpd);
824 ccos(tmpd);
825 ccosh(tmpd);
826 cexp(tmpd);
827 clog(tmpd);
828 csin(tmpd);
829 csinh(tmpd);
830 csqrt(tmpd);
831 ctan(tmpd);
832 ctanh(tmpd);
833 cpow(tmpd, tmpd);
834 typedef __complex__ long double ld_type; ld_type tmpld;
835 cabsl(tmpld);
836 cargl(tmpld);
837 ccosl(tmpld);
838 ccoshl(tmpld);
839 cexpl(tmpld);
840 clogl(tmpld);
841 csinl(tmpld);
842 csinhl(tmpld);
843 csqrtl(tmpld);
844 ctanl(tmpld);
845 ctanhl(tmpld);
846 cpowl(tmpld, tmpld);
847 ],[ac_c99_complex=yes], [ac_c99_complex=no])
848 fi
849 AC_MSG_RESULT($ac_c99_complex)
850 if test x"$ac_c99_complex" = x"yes"; then
851 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX, 1,
852 [Define if C99 functions in <complex.h> should be used in
853 <complex>. Using compiler builtins for these functions requires
854 corresponding C99 library functions to be present.])
855 fi
857 # Check for the existence in <stdio.h> of vscanf, et. al.
858 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
859 AC_CACHE_VAL(ac_c99_stdio, [
860 AC_TRY_COMPILE([#include <stdio.h>
861 #include <stdarg.h>
862 void foo(char* fmt, ...)
863 {
864 va_list args; va_start(args, fmt);
865 vfscanf(stderr, "%i", args);
866 vscanf("%i", args);
867 vsnprintf(fmt, 0, "%i", args);
868 vsscanf(fmt, "%i", args);
869 }],
870 [snprintf("12", 0, "%i");],
871 [ac_c99_stdio=yes], [ac_c99_stdio=no])
872 ])
873 AC_MSG_RESULT($ac_c99_stdio)
875 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
876 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
877 AC_CACHE_VAL(ac_c99_stdlib, [
878 AC_TRY_COMPILE([#include <stdlib.h>],
879 [char* tmp;
880 strtof("gnu", &tmp);
881 strtold("gnu", &tmp);
882 strtoll("gnu", &tmp, 10);
883 strtoull("gnu", &tmp, 10);
884 llabs(10);
885 lldiv(10,1);
886 atoll("10");
887 _Exit(0);
888 lldiv_t mydivt;],[ac_c99_stdlib=yes], [ac_c99_stdlib=no])
889 ])
890 AC_MSG_RESULT($ac_c99_stdlib)
892 # Check for the existence in <wchar.h> of wcstoull, WEOF, etc.
893 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
894 ac_c99_wchar=no;
895 if test x"$ac_has_wchar_h" = xyes &&
896 test x"$ac_has_wctype_h" = xyes; then
897 AC_TRY_COMPILE([#include <wchar.h>
898 #include <stddef.h>
899 wint_t i;
900 long l = WEOF;
901 long j = WCHAR_MIN;
902 long k = WCHAR_MAX;
903 namespace test
904 {
905 using ::btowc;
906 using ::fgetwc;
907 using ::fgetws;
908 using ::fputwc;
909 using ::fputws;
910 using ::fwide;
911 using ::fwprintf;
912 using ::fwscanf;
913 using ::getwc;
914 using ::getwchar;
915 using ::mbrlen;
916 using ::mbrtowc;
917 using ::mbsinit;
918 using ::mbsrtowcs;
919 using ::putwc;
920 using ::putwchar;
921 using ::swprintf;
922 using ::swscanf;
923 using ::ungetwc;
924 using ::vfwprintf;
925 using ::vswprintf;
926 using ::vwprintf;
927 using ::wcrtomb;
928 using ::wcscat;
929 using ::wcschr;
930 using ::wcscmp;
931 using ::wcscoll;
932 using ::wcscpy;
933 using ::wcscspn;
934 using ::wcsftime;
935 using ::wcslen;
936 using ::wcsncat;
937 using ::wcsncmp;
938 using ::wcsncpy;
939 using ::wcspbrk;
940 using ::wcsrchr;
941 using ::wcsrtombs;
942 using ::wcsspn;
943 using ::wcsstr;
944 using ::wcstod;
945 using ::wcstok;
946 using ::wcstol;
947 using ::wcstold;
948 using ::wcstoll;
949 using ::wcstoul;
950 using ::wcstoull;
951 using ::wcsxfrm;
952 using ::wctob;
953 using ::wmemchr;
954 using ::wmemcmp;
955 using ::wmemcpy;
956 using ::wmemmove;
957 using ::wmemset;
958 using ::wprintf;
959 using ::wscanf;
960 }
961 ],[],[ac_c99_wchar=yes], [ac_c99_wchar=no])
963 # Checks for wide character functions that may not be present.
964 # Injection of these is wrapped with guard macros.
965 # NB: only put functions here, instead of immediately above, if
966 # absolutely necessary.
967 AC_TRY_COMPILE([#include <wchar.h>
968 namespace test { using ::vfwscanf; } ], [],
969 [AC_DEFINE(HAVE_VFWSCANF,1,
970 [Defined if vfwscanf exists.])],[])
972 AC_TRY_COMPILE([#include <wchar.h>
973 namespace test { using ::vswscanf; } ], [],
974 [AC_DEFINE(HAVE_VSWSCANF,1,
975 [Defined if vswscanf exists.])],[])
977 AC_TRY_COMPILE([#include <wchar.h>
978 namespace test { using ::vwscanf; } ], [],
979 [AC_DEFINE(HAVE_VWSCANF,1,[Defined if vwscanf exists.])],[])
981 AC_TRY_COMPILE([#include <wchar.h>
982 namespace test { using ::wcstof; } ], [],
983 [AC_DEFINE(HAVE_WCSTOF,1,[Defined if wcstof exists.])],[])
985 AC_TRY_COMPILE([#include <wctype.h>],
986 [ wint_t t; int i = iswblank(t);],
987 [AC_DEFINE(HAVE_ISWBLANK,1,
988 [Defined if iswblank exists.])],[])
990 AC_MSG_CHECKING([for ISO C99 support in <wchar.h>])
991 AC_MSG_RESULT($ac_c99_wchar)
992 fi
994 # Option parsed, now set things appropriately.
995 if test x"$ac_c99_math" = x"no" ||
996 test x"$ac_c99_complex" = x"no" ||
997 test x"$ac_c99_stdio" = x"no" ||
998 test x"$ac_c99_stdlib" = x"no" ||
999 test x"$ac_c99_wchar" = x"no"; then
1000 enable_c99=no;
1001 else
1002 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1003 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1004 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1005 fi
1007 AC_LANG_RESTORE
1008 fi
1010 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1011 AC_MSG_RESULT($enable_c99)
1012 ])
1015 dnl
1016 dnl Check for what type of C headers to use.
1017 dnl
1018 dnl --enable-cheaders= [does stuff].
1019 dnl --disable-cheaders [does not do anything, really].
1020 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
1021 dnl Where DEFAULT is either `c' or `c_std'.
1022 dnl
1023 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
1024 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
1025 [construct "C" headers for g++], [permit c|c_std])
1026 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
1028 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
1030 AC_SUBST(C_INCLUDE_DIR)
1031 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
1032 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
1033 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
1034 ])
1037 dnl
1038 dnl Check for which locale library to use. The choice is mapped to
1039 dnl a subdirectory of config/locale.
1040 dnl
1041 dnl Default is generic.
1042 dnl
1043 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
1044 AC_MSG_CHECKING([for C locale to use])
1045 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
1046 [use MODEL for target locale package],
1047 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
1049 # If they didn't use this option switch, or if they specified --enable
1050 # with no specific model, we'll have to look for one. If they
1051 # specified --disable (???), do likewise.
1052 if test $enable_clocale = no || test $enable_clocale = yes; then
1053 enable_clocale=auto
1054 fi
1056 # Either a known package, or "auto"
1057 enable_clocale_flag=$enable_clocale
1059 # Probe for locale support if no specific model is specified.
1060 # Default to "generic".
1061 if test $enable_clocale_flag = auto; then
1062 case ${target_os} in
1063 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1064 AC_EGREP_CPP([_GLIBCXX_ok], [
1065 #include <features.h>
1066 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1067 _GLIBCXX_ok
1068 #endif
1069 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1071 # Test for bugs early in glibc-2.2.x series
1072 if test $enable_clocale_flag = gnu; then
1073 AC_TRY_RUN([
1074 #define _GNU_SOURCE 1
1075 #include <locale.h>
1076 #include <string.h>
1077 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1078 extern __typeof(newlocale) __newlocale;
1079 extern __typeof(duplocale) __duplocale;
1080 extern __typeof(strcoll_l) __strcoll_l;
1081 #endif
1082 int main()
1083 {
1084 const char __one[] = "Äuglein Augmen";
1085 const char __two[] = "Äuglein";
1086 int i;
1087 int j;
1088 __locale_t loc;
1089 __locale_t loc_dup;
1090 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1091 loc_dup = __duplocale(loc);
1092 i = __strcoll_l(__one, __two, loc);
1093 j = __strcoll_l(__one, __two, loc_dup);
1094 return 0;
1095 }
1096 ],
1097 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1098 [enable_clocale_flag=generic])
1099 fi
1101 # ... at some point put __strxfrm_l tests in as well.
1102 ;;
1103 darwin* | freebsd*)
1104 enable_clocale_flag=darwin
1105 ;;
1106 *)
1107 enable_clocale_flag=generic
1108 ;;
1109 esac
1110 fi
1112 # Deal with gettext issues. Default to not using it (=no) until we detect
1113 # support for it later. Let the user turn it off via --e/d, but let that
1114 # default to on for easier handling.
1115 USE_NLS=no
1116 AC_ARG_ENABLE(nls,
1117 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1118 [],
1119 [enable_nls=yes])
1121 # Set configure bits for specified locale package
1122 case ${enable_clocale_flag} in
1123 generic)
1124 AC_MSG_RESULT(generic)
1126 CLOCALE_H=config/locale/generic/c_locale.h
1127 CLOCALE_CC=config/locale/generic/c_locale.cc
1128 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1129 CCOLLATE_CC=config/locale/generic/collate_members.cc
1130 CCTYPE_CC=config/locale/generic/ctype_members.cc
1131 CMESSAGES_H=config/locale/generic/messages_members.h
1132 CMESSAGES_CC=config/locale/generic/messages_members.cc
1133 CMONEY_CC=config/locale/generic/monetary_members.cc
1134 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1135 CTIME_H=config/locale/generic/time_members.h
1136 CTIME_CC=config/locale/generic/time_members.cc
1137 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1138 ;;
1139 darwin)
1140 AC_MSG_RESULT(darwin or freebsd)
1142 CLOCALE_H=config/locale/generic/c_locale.h
1143 CLOCALE_CC=config/locale/generic/c_locale.cc
1144 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1145 CCOLLATE_CC=config/locale/generic/collate_members.cc
1146 CCTYPE_CC=config/locale/darwin/ctype_members.cc
1147 CMESSAGES_H=config/locale/generic/messages_members.h
1148 CMESSAGES_CC=config/locale/generic/messages_members.cc
1149 CMONEY_CC=config/locale/generic/monetary_members.cc
1150 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1151 CTIME_H=config/locale/generic/time_members.h
1152 CTIME_CC=config/locale/generic/time_members.cc
1153 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1154 ;;
1156 gnu)
1157 AC_MSG_RESULT(gnu)
1159 # Declare intention to use gettext, and add support for specific
1160 # languages.
1161 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1162 ALL_LINGUAS="de fr"
1164 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1165 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1166 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1167 USE_NLS=yes
1168 fi
1169 # Export the build objects.
1170 for ling in $ALL_LINGUAS; do \
1171 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1172 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1173 done
1174 AC_SUBST(glibcxx_MOFILES)
1175 AC_SUBST(glibcxx_POFILES)
1177 CLOCALE_H=config/locale/gnu/c_locale.h
1178 CLOCALE_CC=config/locale/gnu/c_locale.cc
1179 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1180 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1181 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1182 CMESSAGES_H=config/locale/gnu/messages_members.h
1183 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1184 CMONEY_CC=config/locale/gnu/monetary_members.cc
1185 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1186 CTIME_H=config/locale/gnu/time_members.h
1187 CTIME_CC=config/locale/gnu/time_members.cc
1188 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1189 ;;
1190 ieee_1003.1-2001)
1191 AC_MSG_RESULT(IEEE 1003.1)
1193 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1194 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1195 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1196 CCOLLATE_CC=config/locale/generic/collate_members.cc
1197 CCTYPE_CC=config/locale/generic/ctype_members.cc
1198 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1199 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1200 CMONEY_CC=config/locale/generic/monetary_members.cc
1201 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1202 CTIME_H=config/locale/generic/time_members.h
1203 CTIME_CC=config/locale/generic/time_members.cc
1204 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1205 ;;
1206 esac
1208 # This is where the testsuite looks for locale catalogs, using the
1209 # -DLOCALEDIR define during testsuite compilation.
1210 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1211 AC_SUBST(glibcxx_localedir)
1213 # A standalone libintl (e.g., GNU libintl) may be in use.
1214 if test $USE_NLS = yes; then
1215 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1216 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1217 fi
1218 if test $USE_NLS = yes; then
1219 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
1220 [Define if NLS translations are to be used.])
1221 fi
1223 AC_SUBST(USE_NLS)
1224 AC_SUBST(CLOCALE_H)
1225 AC_SUBST(CMESSAGES_H)
1226 AC_SUBST(CCODECVT_CC)
1227 AC_SUBST(CCOLLATE_CC)
1228 AC_SUBST(CCTYPE_CC)
1229 AC_SUBST(CMESSAGES_CC)
1230 AC_SUBST(CMONEY_CC)
1231 AC_SUBST(CNUMERIC_CC)
1232 AC_SUBST(CTIME_H)
1233 AC_SUBST(CTIME_CC)
1234 AC_SUBST(CLOCALE_CC)
1235 AC_SUBST(CLOCALE_INTERNAL_H)
1236 ])
1239 dnl
1240 dnl Check for which std::allocator base class to use. The choice is
1241 dnl mapped from a subdirectory of include/ext.
1242 dnl
1243 dnl Default is new.
1244 dnl
1245 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1246 AC_MSG_CHECKING([for std::allocator base class])
1247 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1248 [use KIND for target std::allocator base],
1249 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1251 # If they didn't use this option switch, or if they specified --enable
1252 # with no specific model, we'll have to look for one. If they
1253 # specified --disable (???), do likewise.
1254 if test $enable_libstdcxx_allocator = no ||
1255 test $enable_libstdcxx_allocator = yes;
1256 then
1257 enable_libstdcxx_allocator=auto
1258 fi
1260 # Either a known package, or "auto". Auto implies the default choice
1261 # for a particular platform.
1262 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1264 # Probe for host-specific support if no specific model is specified.
1265 # Default to "new".
1266 if test $enable_libstdcxx_allocator_flag = auto; then
1267 case ${target_os} in
1268 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1269 enable_libstdcxx_allocator_flag=mt
1270 ;;
1271 *)
1272 enable_libstdcxx_allocator_flag=new
1273 ;;
1274 esac
1275 fi
1276 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1279 # Set configure bits for specified locale package
1280 case ${enable_libstdcxx_allocator_flag} in
1281 bitmap)
1282 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1283 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1284 ;;
1285 malloc)
1286 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1287 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1288 ;;
1289 mt)
1290 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1291 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1292 ;;
1293 new)
1294 ALLOCATOR_H=config/allocator/new_allocator_base.h
1295 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1296 ;;
1297 pool)
1298 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1299 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1300 ;;
1301 esac
1303 AC_SUBST(ALLOCATOR_H)
1304 AC_SUBST(ALLOCATOR_NAME)
1305 ])
1308 dnl
1309 dnl Check for whether the Boost-derived checks should be turned on.
1310 dnl
1311 dnl --enable-concept-checks turns them on.
1312 dnl --disable-concept-checks leaves them off.
1313 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1314 dnl Where DEFAULT is either `yes' or `no'.
1315 dnl
1316 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1317 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1318 if test $enable_concept_checks = yes; then
1319 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
1320 [Define to use concept checking code from the boost libraries.])
1321 fi
1322 ])
1325 dnl
1326 dnl Check for which I/O library to use: stdio, or something specific.
1327 dnl
1328 dnl Default is stdio.
1329 dnl
1330 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1331 AC_MSG_CHECKING([for underlying I/O to use])
1332 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1333 [use target-specific I/O package], [permit stdio])
1335 # Now that libio has been removed, you can have any color you want as long
1336 # as it's black. This is one big no-op until other packages are added, but
1337 # showing the framework never hurts.
1338 case ${enable_cstdio} in
1339 stdio)
1340 CSTDIO_H=config/io/c_io_stdio.h
1341 BASIC_FILE_H=config/io/basic_file_stdio.h
1342 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1343 AC_MSG_RESULT(stdio)
1344 ;;
1345 esac
1347 AC_SUBST(CSTDIO_H)
1348 AC_SUBST(BASIC_FILE_H)
1349 AC_SUBST(BASIC_FILE_CC)
1350 ])
1353 dnl
1354 dnl Check for "unusual" flags to pass to the compiler while building.
1355 dnl
1356 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1357 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1358 dnl --disable-cxx-flags passes nothing.
1359 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1360 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1361 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1362 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1363 dnl If "default flags" is an empty string, the effect is the same
1364 dnl as --disable or --enable=no.
1365 dnl
1366 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1367 AC_MSG_CHECKING([for extra compiler flags for building])
1368 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1369 [pass compiler FLAGS when building library],
1370 [case "x$enable_cxx_flags" in
1371 xno | x) enable_cxx_flags= ;;
1372 x-*) ;;
1373 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1374 esac])
1376 # Run through flags (either default or command-line) and set anything
1377 # extra (e.g., #defines) that must accompany particular g++ options.
1378 if test -n "$enable_cxx_flags"; then
1379 for f in $enable_cxx_flags; do
1380 case "$f" in
1381 -fhonor-std) ;;
1382 -*) ;;
1383 *) # and we're trying to pass /what/ exactly?
1384 AC_MSG_ERROR([compiler flags start with a -]) ;;
1385 esac
1386 done
1387 fi
1389 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1390 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1391 AC_SUBST(EXTRA_CXX_FLAGS)
1392 ])
1395 dnl
1396 dnl Check to see if debugging libraries are to be built.
1397 dnl
1398 dnl --enable-libstdcxx-debug
1399 dnl builds a separate set of debugging libraries in addition to the
1400 dnl normal (shared, static) libstdc++ binaries.
1401 dnl
1402 dnl --disable-libstdcxx-debug
1403 dnl builds only one (non-debug) version of libstdc++.
1404 dnl
1405 dnl --enable-libstdcxx-debug-flags=FLAGS
1406 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1407 dnl
1408 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1409 dnl Where DEFAULT is either `yes' or `no'.
1410 dnl
1411 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1412 AC_MSG_CHECKING([for additional debug build])
1413 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1414 AC_MSG_RESULT($enable_libstdcxx_debug)
1415 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1416 ])
1419 dnl
1420 dnl Check for explicit debug flags.
1421 dnl
1422 dnl --enable-libstdcxx-debug-flags='-O1'
1423 dnl is a general method for passing flags to be used when
1424 dnl building debug libraries with --enable-debug.
1425 dnl
1426 dnl --disable-libstdcxx-debug-flags does nothing.
1427 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1428 dnl If "default flags" is an empty string, the effect is the same
1429 dnl as --disable or --enable=no.
1430 dnl
1431 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1432 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1433 [pass compiler FLAGS when building debug library],
1434 [case "x$enable_libstdcxx_debug_flags" in
1435 xno | x) enable_libstdcxx_debug_flags= ;;
1436 x-*) ;;
1437 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1438 esac])
1440 # Option parsed, now set things appropriately
1441 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1442 AC_SUBST(DEBUG_FLAGS)
1444 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1445 ])
1448 dnl
1449 dnl Check if the user only wants a freestanding library implementation.
1450 dnl
1451 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1452 dnl installing only the headers required by [17.4.1.3] and the language
1453 dnl support library. More than that will be built (to keep the Makefiles
1454 dnl conveniently clean), but not installed.
1455 dnl
1456 dnl Sets:
1457 dnl is_hosted (yes/no)
1458 dnl
1459 dnl Defines:
1460 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1461 dnl
1462 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1463 AC_ARG_ENABLE([hosted-libstdcxx],
1464 AC_HELP_STRING([--disable-hosted-libstdcxx],
1465 [only build freestanding C++ runtime support]),,
1466 [case "$host" in
1467 arm*-*-symbianelf*)
1468 enable_hosted_libstdcxx=no
1469 ;;
1470 *)
1471 enable_hosted_libstdcxx=yes
1472 ;;
1473 esac])
1474 if test "$enable_hosted_libstdcxx" = no; then
1475 AC_MSG_NOTICE([Only freestanding libraries will be built])
1476 is_hosted=no
1477 hosted_define=0
1478 enable_abi_check=no
1479 enable_libstdcxx_pch=no
1480 else
1481 is_hosted=yes
1482 hosted_define=1
1483 fi
1484 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1485 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1486 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1487 ])
1490 dnl
1491 dnl Check for template specializations for the 'long long' type.
1492 dnl The result determines only whether 'long long' I/O is enabled; things
1493 dnl like numeric_limits<> specializations are always available.
1494 dnl
1495 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1496 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1497 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1498 dnl Where DEFAULT is either `yes' or `no'.
1499 dnl
1500 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1501 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
1502 if test $enable_long_long = yes; then
1503 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
1504 [Define if code specialized for long long should be used.])
1505 fi
1506 AC_MSG_CHECKING([for enabled long long specializations])
1507 AC_MSG_RESULT([$enable_long_long])
1508 ])
1511 dnl
1512 dnl Check for template specializations for the 'wchar_t' type.
1513 dnl
1514 dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
1515 dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
1516 dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
1517 dnl Where DEFAULT is either `yes' or `no'.
1518 dnl
1519 dnl Necessary support (probed along with C99 support) must also be present.
1520 dnl
1521 AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
1522 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
1523 if test x"$ac_c99_wchar" = x"yes" && test x"$enable_wchar_t" = x"yes"; then
1524 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
1525 [Define if code specialized for wchar_t should be used.])
1526 fi
1527 AC_MSG_CHECKING([for enabled wchar_t specializations])
1528 AC_MSG_RESULT([$enable_wchar_t])
1529 ])
1532 dnl
1533 dnl Check to see if building and using a C++ precompiled header can be done.
1534 dnl
1535 dnl --enable-libstdcxx-pch=yes
1536 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1537 dnl may work, after some light-hearted attempts to puzzle out compiler
1538 dnl support, flip bits on in include/Makefile.am
1539 dnl
1540 dnl --disable-libstdcxx-pch
1541 dnl turns off attempts to use or build stdc++.h.gch.
1542 dnl
1543 dnl Substs:
1544 dnl glibcxx_PCHFLAGS
1545 dnl
1546 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1547 AC_MSG_CHECKING([for enabled PCH])
1548 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1549 AC_MSG_RESULT([$enable_libstdcxx_pch])
1551 if test $enable_libstdcxx_pch = yes; then
1552 AC_CACHE_CHECK([for compiler with PCH support],
1553 [glibcxx_cv_prog_CXX_pch],
1554 [ac_save_CXXFLAGS="$CXXFLAGS"
1555 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1556 AC_LANG_SAVE
1557 AC_LANG_CPLUSPLUS
1558 echo '#include <math.h>' > conftest.h
1559 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1560 -o conftest.h.gch 1>&5 2>&1 &&
1561 echo '#error "pch failed"' > conftest.h &&
1562 echo '#include "conftest.h"' > conftest.cc &&
1563 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1564 then
1565 glibcxx_cv_prog_CXX_pch=yes
1566 else
1567 glibcxx_cv_prog_CXX_pch=no
1568 fi
1569 rm -f conftest*
1570 CXXFLAGS=$ac_save_CXXFLAGS
1571 AC_LANG_RESTORE
1572 ])
1573 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1574 fi
1576 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1577 if test $enable_libstdcxx_pch = yes; then
1578 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1579 else
1580 glibcxx_PCHFLAGS=""
1581 fi
1582 AC_SUBST(glibcxx_PCHFLAGS)
1583 ])
1586 dnl
1587 dnl Check for exception handling support. If an explicit enable/disable
1588 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1589 dnl target may or may not support call frame exceptions.
1590 dnl
1591 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1592 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1593 dnl Neither one forces an attempt at detection.
1594 dnl
1595 dnl Defines:
1596 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1597 dnl
1598 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1599 AC_MSG_CHECKING([for exception model to use])
1600 AC_LANG_SAVE
1601 AC_LANG_CPLUSPLUS
1602 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1603 [force use of builtin_setjmp for exceptions],
1604 [permit yes|no|auto])
1606 if test $enable_sjlj_exceptions = auto; then
1607 # Botheration. Now we've got to detect the exception model. Link tests
1608 # against libgcc.a are problematic since we've not been given proper -L
1609 # bits for single-tree newlib and libgloss.
1610 #
1611 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1612 cat > conftest.$ac_ext << EOF
1613 [#]line __oline__ "configure"
1614 struct S { ~S(); };
1615 void bar();
1616 void foo()
1617 {
1618 S s;
1619 bar();
1620 }
1621 EOF
1622 old_CXXFLAGS="$CXXFLAGS"
1623 CXXFLAGS=-S
1624 if AC_TRY_EVAL(ac_compile); then
1625 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1626 enable_sjlj_exceptions=yes
1627 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1628 enable_sjlj_exceptions=no
1629 elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then
1630 enable_sjlj_exceptions=no
1631 fi
1632 fi
1633 CXXFLAGS="$old_CXXFLAGS"
1634 rm -f conftest*
1635 fi
1637 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1638 # to two different models.
1639 case $enable_sjlj_exceptions in
1640 yes)
1641 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1642 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1643 ac_exception_model_name=sjlj
1644 ;;
1645 no)
1646 ac_exception_model_name="call frame"
1647 ;;
1648 *)
1649 AC_MSG_ERROR([unable to detect exception model])
1650 ;;
1651 esac
1652 AC_LANG_RESTORE
1653 AC_MSG_RESULT($ac_exception_model_name)
1654 ])
1657 dnl
1658 dnl Add version tags to symbols in shared library (or not), additionally
1659 dnl marking other symbols as private/local (or not).
1660 dnl
1661 dnl --enable-symvers=style adds a version script to the linker call when
1662 dnl creating the shared library. The choice of version script is
1663 dnl controlled by 'style'.
1664 dnl --disable-symvers does not.
1665 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1666 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1667 dnl choose a default style based on linker characteristics. Passing
1668 dnl 'no' disables versioning.
1669 dnl
1670 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1672 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1673 [enables symbol versioning of the shared library],
1674 [permit yes|no|gnu])
1676 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1677 # don't know enough about $LD to do tricks...
1678 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1679 # FIXME The following test is too strict, in theory.
1680 if test $enable_shared = no ||
1681 test "x$LD" = x ||
1682 test x$glibcxx_gnu_ld_version = x; then
1683 enable_symvers=no
1684 fi
1686 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1687 if test $enable_symvers != no; then
1688 AC_MSG_CHECKING([for shared libgcc])
1689 ac_save_CFLAGS="$CFLAGS"
1690 CFLAGS=' -lgcc_s'
1691 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1692 CFLAGS="$ac_save_CFLAGS"
1693 if test $glibcxx_shared_libgcc = no; then
1694 cat > conftest.c <<EOF
1695 int main (void) { return 0; }
1696 EOF
1697 changequote(,)dnl
1698 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1699 -shared -shared-libgcc -o conftest.so \
1700 conftest.c -v 2>&1 >/dev/null \
1701 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1702 changequote([,])dnl
1703 rm -f conftest.c conftest.so
1704 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1705 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1706 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1707 CFLAGS="$ac_save_CFLAGS"
1708 fi
1709 fi
1710 AC_MSG_RESULT($glibcxx_shared_libgcc)
1711 fi
1713 # For GNU ld, we need at least this version. The format is described in
1714 # GLIBCXX_CHECK_LINKER_FEATURES above.
1715 glibcxx_min_gnu_ld_version=21400
1717 # Check to see if unspecified "yes" value can win, given results above.
1718 # Change "yes" into either "no" or a style name.
1719 if test $enable_symvers = yes; then
1720 if test $with_gnu_ld = yes &&
1721 test $glibcxx_shared_libgcc = yes;
1722 then
1723 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1724 enable_symvers=gnu
1725 else
1726 # The right tools, the right setup, but too old. Fallbacks?
1727 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1728 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1729 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1730 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1731 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1732 # Globbing fix is present, proper block support is not.
1733 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1734 enable_symvers=no
1735 else
1736 # 2.11 or older.
1737 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1738 enable_symvers=no
1739 fi
1740 fi
1741 else
1742 # just fail for now
1743 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1744 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1745 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1746 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1747 enable_symvers=no
1748 fi
1749 fi
1751 # Everything parsed; figure out what file to use.
1752 case $enable_symvers in
1753 no)
1754 SYMVER_MAP=config/linker-map.dummy
1755 ;;
1756 gnu)
1757 SYMVER_MAP=config/linker-map.gnu
1758 AC_DEFINE(_GLIBCXX_SYMVER, 1,
1759 [Define to use symbol versioning in the shared library.])
1760 ;;
1761 esac
1763 # In addition, need this to deal with std::size_t mangling in
1764 # src/compatibility.cc. In a perfect world, could use
1765 # typeid(std::size_t).name()[0] to do direct substitution.
1766 AC_MSG_CHECKING([for size_t as unsigned int])
1767 ac_save_CFLAGS="$CFLAGS"
1768 CFLAGS="-Werror"
1769 AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
1770 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
1771 CFLAGS=$ac_save_CFLAGS
1772 if test "$glibcxx_size_t_is_i" = yes; then
1773 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
1774 fi
1775 AC_MSG_RESULT([$glibcxx_size_t_is_i])
1777 AC_MSG_CHECKING([for ptrdiff_t as int])
1778 ac_save_CFLAGS="$CFLAGS"
1779 CFLAGS="-Werror"
1780 AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
1781 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
1782 CFLAGS=$ac_save_CFLAGS
1783 if test "$glibcxx_ptrdiff_t_is_i" = yes; then
1784 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
1785 fi
1786 AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
1788 AC_SUBST(SYMVER_MAP)
1789 AC_SUBST(port_specific_symbol_files)
1790 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1791 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1792 ])
1795 dnl
1796 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1797 dnl We must stage the required headers so that they will be installed
1798 dnl with the library (unlike libgcc, the STL implementation is provided
1799 dnl solely within headers). Since we must not inject random user-space
1800 dnl macro names into user-provided C++ code, we first stage into <file>-in
1801 dnl and process to <file> with an output command. The reason for a two-
1802 dnl stage process here is to correctly handle $srcdir!=$objdir without
1803 dnl having to write complex code (the sed commands to clean the macro
1804 dnl namespace are complex and fragile enough as it is). We must also
1805 dnl add a relative path so that -I- is supported properly.
1806 dnl
1807 dnl Substs:
1808 dnl glibcxx_thread_h
1809 dnl
1810 dnl Defines:
1811 dnl HAVE_GTHR_DEFAULT
1812 dnl
1813 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1814 AC_MSG_CHECKING([for thread model used by GCC])
1815 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1816 AC_MSG_RESULT([$target_thread_file])
1818 if test $target_thread_file != single; then
1819 AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
1820 [Define if gthr-default.h exists
1821 (meaning that threading support is enabled).])
1822 fi
1824 glibcxx_thread_h=gthr-$target_thread_file.h
1826 dnl Check for __GTHREADS define.
1827 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
1828 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
1829 enable_thread=yes
1830 else
1831 enable_thread=no
1832 fi
1834 AC_SUBST(glibcxx_thread_h)
1835 ])
1838 # Check whether LC_MESSAGES is available in <locale.h>.
1839 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1840 #
1841 # This file file be copied and used freely without restrictions. It can
1842 # be used in projects which are not available under the GNU Public License
1843 # but which still want to provide support for the GNU gettext functionality.
1844 # Please note that the actual code is *not* freely available.
1846 # serial 1
1847 AC_DEFUN([AC_LC_MESSAGES], [
1848 AC_CHECK_HEADER(locale.h, [
1849 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1850 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1851 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1852 if test $ac_cv_val_LC_MESSAGES = yes; then
1853 AC_DEFINE(HAVE_LC_MESSAGES, 1,
1854 [Define if LC_MESSAGES is available in <locale.h>.])
1855 fi
1856 ])
1857 ])
1860 dnl vim:et:ts=2:sw=2