| blob | 5f744ceb4f4d1cb6eb39304c38253dd85afae3ee |
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 $host.
33 dnl
34 dnl Sets:
35 dnl gcc_version (x.y.z format)
36 dnl SUBDIRS
37 dnl Substs:
38 dnl glibcxx_builddir (absolute path)
39 dnl glibcxx_srcdir (absolute path)
40 dnl toplevel_srcdir (absolute path)
41 dnl with_cross_host
42 dnl with_newlib
43 dnl with_target_subdir
44 dnl plus
45 dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
46 dnl - default settings for all AM_CONFITIONAL test variables
47 dnl - lots of tools, like CC and CXX
48 dnl
49 AC_DEFUN([GLIBCXX_CONFIGURE], [
50 # Keep these sync'd with the list in Makefile.am. The first provides an
51 # expandable list at autoconf time; the second provides an expandable list
52 # (i.e., shell variable) at configure time.
53 m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src po testsuite])
54 SUBDIRS='glibcxx_SUBDIRS'
56 # These need to be absolute paths, yet at the same time need to
57 # canonicalize only relative paths, because then amd will not unmount
58 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
59 glibcxx_builddir=`${PWDCMD-pwd}`
60 case $srcdir in
61 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
62 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
63 esac
64 toplevel_srcdir=${glibcxx_srcdir}/..
65 AC_SUBST(glibcxx_builddir)
66 AC_SUBST(glibcxx_srcdir)
67 AC_SUBST(toplevel_srcdir)
69 # We use these options to decide which functions to include. They are
70 # set from the top level.
71 AC_ARG_WITH([target-subdir],
72 AC_HELP_STRING([--with-target-subdir=SUBDIR],
73 [configuring in a subdirectory]))
75 AC_ARG_WITH([cross-host],
76 AC_HELP_STRING([--with-cross-host=HOST],
77 [configuring with a cross compiler]))
79 AC_ARG_WITH([newlib],
80 AC_HELP_STRING([--with-newlib],
81 [assume newlib as a system C library]))
83 # We're almost certainly being configured before anything else which uses
84 # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
85 # we not cache the value of CXX that we "discover" here, because it's set
86 # to something unique for us and libjava. Other target libraries need to
87 # find CXX for themselves. We yank the rug out from under the normal AC_*
88 # process by sneakily renaming the cache variable. This also lets us debug
89 # the value of "our" CXX in postmortems.
90 #
91 # We must also force CXX to /not/ be a precious variable, otherwise the
92 # wrong (non-multilib-adjusted) value will be used in multilibs. This
93 # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
94 # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
95 # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
96 #
97 # -fno-builtin must be present here so that a non-conflicting form of
98 # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
100 m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
101 m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
102 m4_define([_AC_ARG_VAR_PRECIOUS],[])
103 save_CXXFLAGS="$CXXFLAGS"
104 CXXFLAGS="$CXXFLAGS -fno-builtin"
105 AC_PROG_CC
106 AC_PROG_CXX
107 CXXFLAGS="$save_CXXFLAGS"
108 m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
109 AC_SUBST(CFLAGS)
110 AC_SUBST(CXXFLAGS)
112 # For directory versioning (e.g., headers) and other variables.
113 AC_MSG_CHECKING([for GCC version number])
114 gcc_version=`$CXX -dumpversion`
115 AC_MSG_RESULT($gcc_version)
117 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
118 # available). Uncomment the next line to force a particular method.
119 AC_PROG_LN_S
120 #LN_S='cp -p'
122 AC_CHECK_TOOL(AS, as)
123 AC_CHECK_TOOL(AR, ar)
124 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
126 AM_MAINTAINER_MODE
128 # Set up safe default values for all subsequent AM_CONDITIONAL tests
129 # which are themselves conditionally expanded.
130 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
131 ## other macros from doing the same. This should be automated.) -pme
132 need_libmath=no
133 enable_wchar_t=no
134 #enable_libstdcxx_debug=no
135 #enable_libstdcxx_pch=no
136 #enable_cheaders=c
137 #c_compatibility=no
138 #enable_abi_check=no
139 #enable_symvers=no
140 #enable_hosted_libstdcxx=yes
142 # Find platform-specific directories containing configuration info.
143 # Also possibly modify flags used elsewhere, as needed by the platform.
144 GLIBCXX_CHECK_HOST
145 ])
148 m4_include([linkage.m4])
149 m4_include([../config/no-executables.m4])
152 dnl
153 dnl Tests for newer compiler features, or features that are present in newer
154 dnl compiler versions but not older compiler versions still in use, should
155 dnl be placed here.
156 dnl
157 dnl Defines:
158 dnl WERROR='-Werror' if requested and possible; g++'s that lack the
159 dnl new inlining code or the new system_header pragma will die on -Werror.
160 dnl Leave it out by default and use maint-mode to use it.
161 dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
162 dnl compiler supports it and the user has not requested debug mode.
163 dnl
164 AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
165 # All these tests are for C++; save the language and the compiler flags.
166 # The CXXFLAGS thing is suspicious, but based on similar bits previously
167 # found in GLIBCXX_CONFIGURE.
168 AC_LANG_SAVE
169 AC_LANG_CPLUSPLUS
170 ac_test_CXXFLAGS="${CXXFLAGS+set}"
171 ac_save_CXXFLAGS="$CXXFLAGS"
173 # Check for maintainer-mode bits.
174 if test x"$USE_MAINTAINER_MODE" = xno; then
175 WERROR=''
176 else
177 WERROR='-Werror'
178 fi
180 # Check for -ffunction-sections -fdata-sections
181 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
182 CXXFLAGS='-Werror -ffunction-sections -fdata-sections'
183 AC_TRY_COMPILE(, [int foo;], [ac_fdsections=yes], [ac_fdsections=no])
184 if test "$ac_test_CXXFLAGS" = set; then
185 CXXFLAGS="$ac_save_CXXFLAGS"
186 else
187 # this is the suspicious part
188 CXXFLAGS=''
189 fi
190 if test x"$ac_fdsections" = x"yes"; then
191 SECTION_FLAGS='-ffunction-sections -fdata-sections'
192 fi
193 AC_MSG_RESULT($ac_fdsections)
195 AC_LANG_RESTORE
196 AC_SUBST(WERROR)
197 AC_SUBST(SECTION_FLAGS)
198 ])
201 dnl
202 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
203 dnl the native linker is in use, all variables will be defined to something
204 dnl safe (like an empty string).
205 dnl
206 dnl Defines:
207 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
208 dnl OPT_LDFLAGS='-Wl,-O1' if possible
209 dnl LD (as a side effect of testing)
210 dnl Sets:
211 dnl with_gnu_ld
212 dnl glibcxx_gnu_ld_version (possibly)
213 dnl
214 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
215 dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
216 dnl
217 AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
218 # If we're not using GNU ld, then there's no point in even trying these
219 # tests. Check for that first. We should have already tested for gld
220 # by now (in libtool), but require it now just to be safe...
221 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
222 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
223 AC_REQUIRE([AC_PROG_LD])
224 AC_REQUIRE([AC_PROG_AWK])
226 # The name set by libtool depends on the version of libtool. Shame on us
227 # for depending on an impl detail, but c'est la vie. Older versions used
228 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
229 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
230 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
231 # set (hence we're using an older libtool), then set it.
232 if test x${with_gnu_ld+set} != xset; then
233 if test x${ac_cv_prog_gnu_ld+set} != xset; then
234 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
235 with_gnu_ld=no
236 else
237 with_gnu_ld=$ac_cv_prog_gnu_ld
238 fi
239 fi
241 # Start by getting the version number. I think the libtool test already
242 # does some of this, but throws away the result.
243 changequote(,)
244 ldver=`$LD --version 2>/dev/null | head -1 | \
245 sed -e 's/GNU ld version \([0-9.][0-9.]*\).*/\1/'`
246 changequote([,])
247 glibcxx_gnu_ld_version=`echo $ldver | \
248 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
250 # Set --gc-sections.
251 if test "$with_gnu_ld" = "notbroken"; then
252 # GNU ld it is! Joy and bunny rabbits!
254 # All these tests are for C++; save the language and the compiler flags.
255 # Need to do this so that g++ won't try to link in libstdc++
256 ac_test_CFLAGS="${CFLAGS+set}"
257 ac_save_CFLAGS="$CFLAGS"
258 CFLAGS='-x c++ -Wl,--gc-sections'
260 # Check for -Wl,--gc-sections
261 # XXX This test is broken at the moment, as symbols required for linking
262 # are now in libsupc++ (not built yet). In addition, this test has
263 # cored on solaris in the past. In addition, --gc-sections doesn't
264 # really work at the moment (keeps on discarding used sections, first
265 # .eh_frame and now some of the glibc sections for iconv).
266 # Bzzzzt. Thanks for playing, maybe next time.
267 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
268 AC_TRY_RUN([
269 int main(void)
270 {
271 try { throw 1; }
272 catch (...) { };
273 return 0;
274 }
275 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes])
276 if test "$ac_test_CFLAGS" = set; then
277 CFLAGS="$ac_save_CFLAGS"
278 else
279 # this is the suspicious part
280 CFLAGS=''
281 fi
282 if test "$ac_sectionLDflags" = "yes"; then
283 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
284 fi
285 AC_MSG_RESULT($ac_sectionLDflags)
286 fi
288 # Set linker optimization flags.
289 if test x"$with_gnu_ld" = x"yes"; then
290 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
291 fi
293 AC_SUBST(SECTION_LDFLAGS)
294 AC_SUBST(OPT_LDFLAGS)
295 ])
298 dnl
299 dnl Check to see if this target can enable the wchar_t parts.
300 dnl If --disable-c-mbchar was given, no wchar_t stuff is enabled. (This
301 dnl must have been previously checked.) By default, wide characters are
302 dnl disabled.
303 dnl
304 dnl Defines:
305 dnl HAVE_MBSTATE_T if mbstate_t is not in wchar.h
306 dnl _GLIBCXX_USE_WCHAR_T if all the bits are found.
307 dnl Substs:
308 dnl LIBICONV to a -l string containing the iconv library, if needed.
309 dnl
310 AC_DEFUN([GLIBCXX_CHECK_WCHAR_T_SUPPORT], [
311 # Test wchar.h for mbstate_t, which is needed for char_traits and
312 # others even if wchar_t support is not on.
313 AC_MSG_CHECKING([for mbstate_t])
314 AC_TRY_COMPILE([#include <wchar.h>],
315 [mbstate_t teststate;],
316 have_mbstate_t=yes, have_mbstate_t=no)
317 AC_MSG_RESULT($have_mbstate_t)
318 if test x"$have_mbstate_t" = xyes; then
319 AC_DEFINE(HAVE_MBSTATE_T)
320 fi
322 # Sanity check for existence of ISO C99 headers for extended encoding.
323 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
324 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
326 # Only continue checking if the ISO C99 headers exist and support is on.
327 if test x"$ac_has_wchar_h" = xyes &&
328 test x"$ac_has_wctype_h" = xyes &&
329 test x"$enable_c_mbchar" != xno; then
331 # Test wchar.h for WCHAR_MIN, WCHAR_MAX, which is needed before
332 # numeric_limits can instantiate type_traits<wchar_t>
333 AC_MSG_CHECKING([for WCHAR_MIN and WCHAR_MAX])
334 AC_TRY_COMPILE([#include <wchar.h>],
335 [int i = WCHAR_MIN; int j = WCHAR_MAX;],
336 has_wchar_minmax=yes, has_wchar_minmax=no)
337 AC_MSG_RESULT($has_wchar_minmax)
339 # Test wchar.h for WEOF, which is what we use to determine whether
340 # to specialize for char_traits<wchar_t> or not.
341 AC_MSG_CHECKING([for WEOF])
342 AC_TRY_COMPILE([
343 #include <wchar.h>
344 #include <stddef.h>],
345 [wint_t i = WEOF;],
346 has_weof=yes, has_weof=no)
347 AC_MSG_RESULT($has_weof)
349 # Tests for wide character functions used in char_traits<wchar_t>.
350 ac_wfuncs=yes
351 AC_CHECK_FUNCS([wcslen wmemchr wmemcmp wmemcpy wmemmove wmemset],
352 [],[ac_wfuncs=no])
354 # Checks for names injected into std:: by the c_std headers.
355 AC_CHECK_FUNCS([btowc wctob fgetwc fgetws fputwc fputws fwide \
356 fwprintf fwscanf swprintf swscanf vfwprintf vswprintf \
357 vwprintf wprintf wscanf getwc getwchar mbsinit mbrlen mbrtowc \
358 mbsrtowcs wcsrtombs putwc putwchar ungetwc wcrtomb wcstod wcstol \
359 wcstoul wcscpy wcsncpy wcscat wcsncat wcscmp wcscoll wcsncmp wcsxfrm \
360 wcscspn wcsspn wcstok wcsftime wcschr wcspbrk wcsrchr wcsstr],
361 [],[ac_wfuncs=no])
363 # Checks for wide character functions that are not required
364 # for basic wchar_t support. Don't disable support if they are missing.
365 # Injection of these is wrapped with guard macros.
366 AC_CHECK_FUNCS([vfwscanf vswscanf vwscanf wcstof iswblank],[],[])
368 AC_MSG_CHECKING([for ISO C99 wchar_t support])
369 if test x"$has_weof" = xyes &&
370 test x"$has_wchar_minmax" = xyes &&
371 test x"$ac_wfuncs" = xyes;
372 then
373 ac_isoC99_wchar_t=yes
374 else
375 ac_isoC99_wchar_t=no
376 fi
377 AC_MSG_RESULT($ac_isoC99_wchar_t)
379 # Use iconv for wchar_t to char conversions. As such, check for
380 # X/Open Portability Guide, version 2 features (XPG2).
381 AC_CHECK_HEADER(iconv.h, ac_has_iconv_h=yes, ac_has_iconv_h=no)
382 AC_CHECK_HEADER(langinfo.h, ac_has_langinfo_h=yes, ac_has_langinfo_h=no)
384 # Check for existence of libiconv.a providing XPG2 wchar_t support.
385 AC_CHECK_LIB(iconv, iconv, LIBICONV="-liconv")
386 ac_save_LIBS="$LIBS"
387 LIBS="$LIBS $LIBICONV"
388 AC_SUBST(LIBICONV)
390 AC_CHECK_FUNCS([iconv_open iconv_close iconv nl_langinfo],
391 [ac_XPG2funcs=yes], [ac_XPG2funcs=no])
393 LIBS="$ac_save_LIBS"
395 AC_MSG_CHECKING([for XPG2 wchar_t support])
396 if test x"$ac_has_iconv_h" = xyes &&
397 test x"$ac_has_langinfo_h" = xyes &&
398 test x"$ac_XPG2funcs" = xyes;
399 then
400 ac_XPG2_wchar_t=yes
401 else
402 ac_XPG2_wchar_t=no
403 fi
404 AC_MSG_RESULT($ac_XPG2_wchar_t)
406 # At the moment, only enable wchar_t specializations if all the
407 # above support is present.
408 if test x"$ac_isoC99_wchar_t" = xyes &&
409 test x"$ac_XPG2_wchar_t" = xyes;
410 then
411 AC_DEFINE(_GLIBCXX_USE_WCHAR_T)
412 enable_wchar_t=yes
413 fi
414 fi
415 AC_MSG_CHECKING([for enabled wchar_t specializations])
416 AC_MSG_RESULT($enable_wchar_t)
417 ])
420 dnl
421 dnl Check for headers for, and arguments to, the setrlimit() function.
422 dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
423 dnl
424 dnl Defines:
425 dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
426 dnl various HAVE_LIMIT_* for individual limit names
427 dnl
428 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
429 AC_TRY_COMPILE(
430 [#include <unistd.h>
431 #include <sys/time.h>
432 #include <sys/resource.h>
433 ],
434 [ int f = RLIMIT_$1 ; ],
435 [glibcxx_mresult=1], [glibcxx_mresult=0])
436 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
437 [Only used in build directory testsuite_hooks.h.])
438 ])
440 AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
441 setrlimit_have_headers=yes
442 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
443 [],
444 [setrlimit_have_headers=no])
445 # If don't have the headers, then we can't run the tests now, and we
446 # won't be seeing any of these during testsuite compilation.
447 if test $setrlimit_have_headers = yes; then
448 # Can't do these in a loop, else the resulting syntax is wrong.
449 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
450 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
451 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
452 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
453 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
455 # Check for rlimit, setrlimit.
456 AC_CACHE_VAL(ac_setrlimit, [
457 AC_TRY_COMPILE(
458 [#include <unistd.h>
459 #include <sys/time.h>
460 #include <sys/resource.h>
461 ],
462 [struct rlimit r;
463 setrlimit(0, &r);],
464 [ac_setrlimit=yes], [ac_setrlimit=no])
465 ])
466 fi
468 AC_MSG_CHECKING([for testsuite resource limits support])
469 if test $setrlimit_have_headers = yes && test $ac_setrlimit = yes; then
470 ac_res_limits=yes
471 AC_DEFINE(_GLIBCXX_RES_LIMITS)
472 else
473 ac_res_limits=no
474 fi
475 AC_MSG_RESULT($ac_res_limits)
476 ])
479 dnl
480 dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
481 dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
482 dnl
483 AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
484 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
485 AC_TRY_LINK(
486 [#include <sys/stat.h>],
487 [struct stat buffer;
488 fstat(0, &buffer);
489 S_ISREG(buffer.st_mode);],
490 [glibcxx_cv_S_ISREG=yes],
491 [glibcxx_cv_S_ISREG=no])
492 ])
493 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
494 AC_TRY_LINK(
495 [#include <sys/stat.h>],
496 [struct stat buffer;
497 fstat(0, &buffer);
498 S_IFREG & buffer.st_mode;],
499 [glibcxx_cv_S_IFREG=yes],
500 [glibcxx_cv_S_IFREG=no])
501 ])
502 if test $glibcxx_cv_S_ISREG = yes; then
503 AC_DEFINE(HAVE_S_ISREG)
504 elif test $glibcxx_cv_S_IFREG = yes; then
505 AC_DEFINE(HAVE_S_IFREG)
506 fi
507 ])
510 dnl
511 dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
512 dnl
513 AC_DEFUN([GLIBCXX_CHECK_POLL], [
514 AC_CACHE_VAL(glibcxx_cv_POLL, [
515 AC_TRY_LINK(
516 [#include <poll.h>],
517 [struct pollfd pfd[1];
518 pfd[0].events = POLLIN;
519 poll(pfd, 1, 0);],
520 [glibcxx_cv_POLL=yes],
521 [glibcxx_cv_POLL=no])
522 ])
523 if test $glibcxx_cv_POLL = yes; then
524 AC_DEFINE(HAVE_POLL)
525 fi
526 ])
529 dnl
530 dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
531 dnl
532 AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
533 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
534 AC_TRY_LINK(
535 [#include <sys/uio.h>],
536 [struct iovec iov[2];
537 writev(0, iov, 0);],
538 [glibcxx_cv_WRITEV=yes],
539 [glibcxx_cv_WRITEV=no])
540 ])
541 if test $glibcxx_cv_WRITEV = yes; then
542 AC_DEFINE(HAVE_WRITEV)
543 fi
544 ])
547 dnl
548 dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
549 dnl
550 AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
551 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
552 AC_TRY_COMPILE(
553 [#include <stdint.h>],
554 [int64_t var;],
555 [glibcxx_cv_INT64_T=yes],
556 [glibcxx_cv_INT64_T=no])
557 ])
558 if test $glibcxx_cv_INT64_T = yes; then
559 AC_DEFINE(HAVE_INT64_T)
560 fi
561 ])
564 dnl
565 dnl Check whether LFS support is available.
566 dnl
567 AC_DEFUN([GLIBCXX_CHECK_LFS], [
568 AC_LANG_SAVE
569 AC_LANG_CPLUSPLUS
570 ac_save_CXXFLAGS="$CXXFLAGS"
571 CXXFLAGS="$CXXFLAGS -fno-exceptions"
572 AC_CACHE_VAL(glibcxx_cv_LFS, [
573 AC_TRY_LINK(
574 [#include <unistd.h>
575 #include <stdio.h>
576 #include <sys/stat.h>
577 ],
578 [FILE* fp;
579 fopen64("t", "w");
580 fseeko64(fp, 0, SEEK_CUR);
581 ftello64(fp);
582 lseek64(1, 0, SEEK_CUR);
583 struct stat64 buf;
584 fstat64(1, &buf);],
585 [glibcxx_cv_LFS=yes],
586 [glibcxx_cv_LFS=no])
587 ])
588 if test $glibcxx_cv_LFS = yes; then
589 AC_DEFINE(_GLIBCXX_USE_LFS)
590 fi
591 CXXFLAGS="$ac_save_CXXFLAGS"
592 AC_LANG_RESTORE
593 ])
596 dnl
597 dnl Check for whether a fully dynamic basic_string implementation should
598 dnl be turned on, that does not put empty objects in per-process static
599 dnl memory (mostly useful together with shared memory allocators, see PR
600 dnl libstdc++/16612 for details).
601 dnl
602 dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
603 dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
604 dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
605 dnl Where DEFAULT is either `yes' or `no'.
606 dnl
607 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
608 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
609 if test $enable_fully_dynamic_string = yes; then
610 AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING)
611 fi
612 ])
615 dnl
616 dnl Does any necessary configuration of the testsuite directory. Generates
617 dnl the testsuite_hooks.h header.
618 dnl
619 dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
620 dnl
621 dnl Sets:
622 dnl enable_abi_check / GLIBCXX_TEST_ABI
623 dnl GLIBCXX_TEST_WCHAR_T
624 dnl GLIBCXX_TEST_THREAD
625 dnl Substs:
626 dnl baseline_dir
627 dnl
628 AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
629 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes; then
630 # Do checks for resource limit functions.
631 GLIBCXX_CHECK_SETRLIMIT
633 # Look for setenv, so that extended locale tests can be performed.
634 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
636 if test $enable_symvers = no; then
637 enable_abi_check=no
638 else
639 case "$host" in
640 *-*-cygwin*)
641 enable_abi_check=no ;;
642 *)
643 enable_abi_check=yes ;;
644 esac
645 fi
646 else
647 # Only build this as native, since automake does not understand
648 # CXX_FOR_BUILD.
649 enable_abi_check=no
650 fi
652 # Export file names for ABI checking.
653 baseline_dir="$glibcxx_srcdir/config/abi/${abi_baseline_pair}\$(MULTISUBDIR)"
654 AC_SUBST(baseline_dir)
656 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_WCHAR_T, test $enable_wchar_t = yes)
657 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_THREAD, test $enable_thread = yes)
658 GLIBCXX_CONDITIONAL(GLIBCXX_TEST_ABI, test $enable_abi_check = yes)
659 ])
662 dnl
663 dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
664 dnl
665 dnl Substs:
666 dnl GLIBCXX_INCLUDES
667 dnl TOPLEVEL_INCLUDES
668 dnl
669 AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
670 # Used for every C++ compile we perform.
671 GLIBCXX_INCLUDES="\
672 -I$glibcxx_builddir/include/$host_alias \
673 -I$glibcxx_builddir/include \
674 -I$glibcxx_srcdir/libsupc++"
676 # For Canadian crosses, pick this up too.
677 if test $CANADIAN = yes; then
678 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
679 fi
681 # Stuff in the actual top level. Currently only used by libsupc++ to
682 # get unwind* headers from the gcc dir.
683 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc -I$(toplevel_srcdir)/include'
684 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/gcc'
686 # Now, export this to all the little Makefiles....
687 AC_SUBST(GLIBCXX_INCLUDES)
688 AC_SUBST(TOPLEVEL_INCLUDES)
689 ])
692 dnl
693 dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
694 dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
695 dnl
696 dnl Substs:
697 dnl OPTIMIZE_CXXFLAGS
698 dnl WARN_FLAGS
699 dnl
700 AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
701 # Optimization flags that are probably a good idea for thrill-seekers. Just
702 # uncomment the lines below and make, everything else is ready to go...
703 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
704 OPTIMIZE_CXXFLAGS=
705 AC_SUBST(OPTIMIZE_CXXFLAGS)
707 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual'
708 AC_SUBST(WARN_FLAGS)
709 ])
712 dnl
713 dnl All installation directory information is determined here.
714 dnl
715 dnl Substs:
716 dnl gxx_install_dir
717 dnl glibcxx_prefixdir
718 dnl glibcxx_toolexecdir
719 dnl glibcxx_toolexeclibdir
720 dnl
721 dnl Assumes cross_compiling bits already done, and with_cross_host in
722 dnl particular.
723 dnl
724 AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
725 glibcxx_toolexecdir=no
726 glibcxx_toolexeclibdir=no
727 glibcxx_prefixdir=$prefix
729 AC_MSG_CHECKING([for gxx-include-dir])
730 AC_ARG_WITH([gxx-include-dir],
731 AC_HELP_STRING([--with-gxx-include-dir=DIR],
732 [installation directory for include files]),
733 [case "$withval" in
734 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
735 no) gxx_include_dir=no ;;
736 *) gxx_include_dir=$withval ;;
737 esac],
738 [gxx_include_dir=no])
739 AC_MSG_RESULT($gxx_include_dir)
741 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
742 AC_ARG_ENABLE([version-specific-runtime-libs],
743 AC_HELP_STRING([--enable-version-specific-runtime-libs],
744 [Specify that runtime libraries should be installed in a compiler-specific directory]),
745 [case "$enableval" in
746 yes) version_specific_libs=yes ;;
747 no) version_specific_libs=no ;;
748 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
749 esac],
750 [version_specific_libs=no])
751 AC_MSG_RESULT($version_specific_libs)
753 # Default case for install directory for include files.
754 if test $version_specific_libs = no && test $gxx_include_dir = no; then
755 gxx_include_dir='${prefix}'/include/c++/${gcc_version}
756 fi
758 # Version-specific runtime libs processing.
759 if test $version_specific_libs = yes; then
760 # Need the gcc compiler version to know where to install libraries
761 # and header files if --enable-version-specific-runtime-libs option
762 # is selected. FIXME: these variables are misnamed, there are
763 # no executables installed in _toolexecdir or _toolexeclibdir.
764 if test x"$gxx_include_dir" = x"no"; then
765 gxx_include_dir='${libdir}/gcc/${host_alias}/'$gcc_version/include/c++
766 fi
767 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
768 glibcxx_toolexeclibdir='${toolexecdir}/'$gcc_version'$(MULTISUBDIR)'
769 fi
771 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
772 # Install a library built with a cross compiler in tooldir, not libdir.
773 if test x"$glibcxx_toolexecdir" = x"no"; then
774 if test -n "$with_cross_host" &&
775 test x"$with_cross_host" != x"no"; then
776 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
777 glibcxx_toolexeclibdir='${toolexecdir}/lib'
778 else
779 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
780 glibcxx_toolexeclibdir='${libdir}'
781 fi
782 multi_os_directory=`$CXX -print-multi-os-directory`
783 case $multi_os_directory in
784 .) ;; # Avoid trailing /.
785 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
786 esac
787 fi
789 AC_MSG_CHECKING([for install location])
790 AC_MSG_RESULT($gxx_include_dir)
792 AC_SUBST(glibcxx_prefixdir)
793 AC_SUBST(gxx_include_dir)
794 AC_SUBST(glibcxx_toolexecdir)
795 AC_SUBST(glibcxx_toolexeclibdir)
796 ])
799 dnl
800 dnl GLIBCXX_ENABLE
801 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
802 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
803 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
804 dnl
805 dnl See docs/html/17_intro/configury.html#enable for documentation.
806 dnl
807 m4_define([GLIBCXX_ENABLE],[dnl
808 m4_define([_g_switch],[--enable-$1])dnl
809 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
810 AC_ARG_ENABLE($1,_g_help,
811 m4_bmatch([$5],
812 [^permit ],
813 [[
814 case "$enableval" in
815 m4_bpatsubst([$5],[permit ])) ;;
816 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
817 dnl Idea for future: generate a URL pointing to
818 dnl "onlinedocs/configopts.html#whatever"
819 esac
820 ]],
821 [^$],
822 [[
823 case "$enableval" in
824 yes|no) ;;
825 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
826 esac
827 ]],
828 [[$5]]),
829 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
830 m4_undefine([_g_switch])dnl
831 m4_undefine([_g_help])dnl
832 ])
835 dnl
836 dnl Check for ISO/IEC 9899:1999 "C99" support.
837 dnl
838 dnl --enable-c99 defines _GLIBCXX_USE_C99
839 dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
840 dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
841 dnl Where DEFAULT is either `yes' or `no'.
842 dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
843 dnl
844 AC_DEFUN([GLIBCXX_ENABLE_C99], [
845 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
847 AC_LANG_SAVE
848 AC_LANG_CPLUSPLUS
850 # Check for the existence of <math.h> functions used if C99 is enabled.
851 ac_c99_math=yes;
852 AC_MSG_CHECKING([for ISO C99 support in <math.h>])
853 AC_TRY_COMPILE([#include <math.h>],[fpclassify(0.0);],, [ac_c99_math=no])
854 AC_TRY_COMPILE([#include <math.h>],[isfinite(0.0);],, [ac_c99_math=no])
855 AC_TRY_COMPILE([#include <math.h>],[isinf(0.0);],, [ac_c99_math=no])
856 AC_TRY_COMPILE([#include <math.h>],[isnan(0.0);],, [ac_c99_math=no])
857 AC_TRY_COMPILE([#include <math.h>],[isnormal(0.0);],, [ac_c99_math=no])
858 AC_TRY_COMPILE([#include <math.h>],[signbit(0.0);],, [ac_c99_math=no])
859 AC_TRY_COMPILE([#include <math.h>],[isgreater(0.0,0.0);],, [ac_c99_math=no])
860 AC_TRY_COMPILE([#include <math.h>],
861 [isgreaterequal(0.0,0.0);],, [ac_c99_math=no])
862 AC_TRY_COMPILE([#include <math.h>],[isless(0.0,0.0);],, [ac_c99_math=no])
863 AC_TRY_COMPILE([#include <math.h>],[islessequal(0.0,0.0);],,[ac_c99_math=no])
864 AC_TRY_COMPILE([#include <math.h>],
865 [islessgreater(0.0,0.0);],, [ac_c99_math=no])
866 AC_TRY_COMPILE([#include <math.h>],
867 [isunordered(0.0,0.0);],, [ac_c99_math=no])
868 AC_MSG_RESULT($ac_c99_math)
870 if test x"$ac_c99_math" = x"yes"; then
871 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
872 fi
874 # Check for the existence in <stdio.h> of vscanf, et. al.
875 ac_c99_stdio=yes;
876 AC_MSG_CHECKING([for ISO C99 support in <stdio.h>])
877 AC_TRY_COMPILE([#include <stdio.h>],
878 [snprintf("12", 0, "%i");],, [ac_c99_stdio=no])
879 AC_TRY_COMPILE([#include <stdio.h>
880 #include <stdarg.h>
881 void foo(char* fmt, ...)
882 {va_list args; va_start(args, fmt);
883 vfscanf(stderr, "%i", args);}],
884 [],, [ac_c99_stdio=no])
885 AC_TRY_COMPILE([#include <stdio.h>
886 #include <stdarg.h>
887 void foo(char* fmt, ...)
888 {va_list args; va_start(args, fmt);
889 vscanf("%i", args);}],
890 [],, [ac_c99_stdio=no])
891 AC_TRY_COMPILE([#include <stdio.h>
892 #include <stdarg.h>
893 void foo(char* fmt, ...)
894 {va_list args; va_start(args, fmt);
895 vsnprintf(fmt, 0, "%i", args);}],
896 [],, [ac_c99_stdio=no])
897 AC_TRY_COMPILE([#include <stdio.h>
898 #include <stdarg.h>
899 void foo(char* fmt, ...)
900 {va_list args; va_start(args, fmt);
901 vsscanf(fmt, "%i", args);}],
902 [],, [ac_c99_stdio=no])
903 AC_MSG_RESULT($ac_c99_stdio)
905 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
906 ac_c99_stdlib=yes;
907 AC_MSG_CHECKING([for lldiv_t declaration])
908 AC_CACHE_VAL(ac_c99_lldiv_t, [
909 AC_TRY_COMPILE([#include <stdlib.h>],
910 [ lldiv_t mydivt;],
911 [ac_c99_lldiv_t=yes], [ac_c99_lldiv_t=no])
912 ])
913 AC_MSG_RESULT($ac_c99_lldiv_t)
915 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h>])
916 AC_TRY_COMPILE([#include <stdlib.h>],
917 [char* tmp; strtof("gnu", &tmp);],, [ac_c99_stdlib=no])
918 AC_TRY_COMPILE([#include <stdlib.h>],
919 [char* tmp; strtold("gnu", &tmp);],, [ac_c99_stdlib=no])
920 AC_TRY_COMPILE([#include <stdlib.h>], [llabs(10);],, [ac_c99_stdlib=no])
921 AC_TRY_COMPILE([#include <stdlib.h>], [lldiv(10,1);],, [ac_c99_stdlib=no])
922 AC_TRY_COMPILE([#include <stdlib.h>], [atoll("10");],, [ac_c99_stdlib=no])
923 AC_TRY_COMPILE([#include <stdlib.h>], [_Exit(0);],, [ac_c99_stdlib=no])
924 if test x"$ac_c99_lldiv_t" = x"no"; then
925 ac_c99_stdlib=no;
926 fi;
927 AC_MSG_RESULT($ac_c99_stdlib)
929 # Check for the existence of <wchar.h> functions used if C99 is enabled.
930 # XXX the wchar.h checks should be rolled into the general C99 bits.
931 ac_c99_wchar=yes;
932 AC_MSG_CHECKING([for additional ISO C99 support in <wchar.h>])
933 AC_TRY_COMPILE([#include <wchar.h>],
934 [wcstold(L"10.0", NULL);],, [ac_c99_wchar=no])
935 AC_TRY_COMPILE([#include <wchar.h>],
936 [wcstoll(L"10", NULL, 10);],, [ac_c99_wchar=no])
937 AC_TRY_COMPILE([#include <wchar.h>],
938 [wcstoull(L"10", NULL, 10);],, [ac_c99_wchar=no])
939 AC_MSG_RESULT($ac_c99_wchar)
941 AC_MSG_CHECKING([for enabled ISO C99 support])
942 if test x"$ac_c99_math" = x"no" ||
943 test x"$ac_c99_stdio" = x"no" ||
944 test x"$ac_c99_stdlib" = x"no" ||
945 test x"$ac_c99_wchar" = x"no"; then
946 enable_c99=no;
947 fi;
948 AC_MSG_RESULT($enable_c99)
950 if test x"$ac_99_math" = x"yes"; then
951 AC_DEFINE(_GLIBCXX_USE_C99_MATH)
952 fi
954 # Option parsed, now set things appropriately
955 if test x"$enable_c99" = x"yes"; then
956 AC_DEFINE(_GLIBCXX_USE_C99)
957 fi
959 AC_LANG_RESTORE
960 ])
963 dnl
964 dnl Check for what type of C headers to use.
965 dnl
966 dnl --enable-cheaders= [does stuff].
967 dnl --disable-cheaders [does not do anything, really].
968 dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
969 dnl Where DEFAULT is either `c' or `c_std'.
970 dnl
971 AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
972 GLIBCXX_ENABLE(cheaders,$1,[=KIND],
973 [construct "C" headers for g++], [permit c|c_std])
974 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
976 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
978 AC_SUBST(C_INCLUDE_DIR)
979 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
980 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
981 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
982 ])
985 dnl
986 dnl Check for which locale library to use. The choice is mapped to
987 dnl a subdirectory of config/locale.
988 dnl
989 dnl Default is generic.
990 dnl
991 AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
992 AC_MSG_CHECKING([for C locale to use])
993 GLIBCXX_ENABLE(clocale,auto,[@<:@=MODEL@:>@],
994 [use MODEL for target locale package],
995 [permit generic|gnu|ieee_1003.1-2001|yes|no|auto])
997 # If they didn't use this option switch, or if they specified --enable
998 # with no specific model, we'll have to look for one. If they
999 # specified --disable (???), do likewise.
1000 if test $enable_clocale = no || test $enable_clocale = yes; then
1001 enable_clocale=auto
1002 fi
1004 # Either a known package, or "auto"
1005 enable_clocale_flag=$enable_clocale
1007 # Probe for locale support if no specific model is specified.
1008 # Default to "generic".
1009 if test $enable_clocale_flag = auto; then
1010 case ${target_os} in
1011 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1012 AC_EGREP_CPP([_GLIBCXX_ok], [
1013 #include <features.h>
1014 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 2)
1015 _GLIBCXX_ok
1016 #endif
1017 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
1019 # Test for bugs early in glibc-2.2.x series
1020 if test $enable_clocale_flag = gnu; then
1021 AC_TRY_RUN([
1022 #define _GNU_SOURCE 1
1023 #include <locale.h>
1024 #include <string.h>
1025 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
1026 extern __typeof(newlocale) __newlocale;
1027 extern __typeof(duplocale) __duplocale;
1028 extern __typeof(strcoll_l) __strcoll_l;
1029 #endif
1030 int main()
1031 {
1032 const char __one[] = "Äuglein Augmen";
1033 const char __two[] = "Äuglein";
1034 int i;
1035 int j;
1036 __locale_t loc;
1037 __locale_t loc_dup;
1038 loc = __newlocale(1 << LC_ALL, "de_DE", 0);
1039 loc_dup = __duplocale(loc);
1040 i = __strcoll_l(__one, __two, loc);
1041 j = __strcoll_l(__one, __two, loc_dup);
1042 return 0;
1043 }
1044 ],
1045 [enable_clocale_flag=gnu],[enable_clocale_flag=generic],
1046 [enable_clocale_flag=generic])
1047 fi
1049 # ... at some point put __strxfrm_l tests in as well.
1050 ;;
1051 *)
1052 enable_clocale_flag=generic
1053 ;;
1054 esac
1055 fi
1057 # Deal with gettext issues. Default to not using it (=no) until we detect
1058 # support for it later. Let the user turn it off via --e/d, but let that
1059 # default to on for easier handling.
1060 USE_NLS=no
1061 AC_ARG_ENABLE(nls,
1062 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
1063 [],
1064 [enable_nls=yes])
1066 # Set configure bits for specified locale package
1067 case ${enable_clocale_flag} in
1068 generic)
1069 AC_MSG_RESULT(generic)
1071 CLOCALE_H=config/locale/generic/c_locale.h
1072 CLOCALE_CC=config/locale/generic/c_locale.cc
1073 CCODECVT_H=config/locale/generic/codecvt_specializations.h
1074 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1075 CCOLLATE_CC=config/locale/generic/collate_members.cc
1076 CCTYPE_CC=config/locale/generic/ctype_members.cc
1077 CMESSAGES_H=config/locale/generic/messages_members.h
1078 CMESSAGES_CC=config/locale/generic/messages_members.cc
1079 CMONEY_CC=config/locale/generic/monetary_members.cc
1080 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1081 CTIME_H=config/locale/generic/time_members.h
1082 CTIME_CC=config/locale/generic/time_members.cc
1083 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1084 ;;
1085 gnu)
1086 AC_MSG_RESULT(gnu)
1088 # Declare intention to use gettext, and add support for specific
1089 # languages.
1090 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
1091 ALL_LINGUAS="de fr"
1093 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
1094 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
1095 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
1096 USE_NLS=yes
1097 fi
1098 # Export the build objects.
1099 for ling in $ALL_LINGUAS; do \
1100 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
1101 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
1102 done
1103 AC_SUBST(glibcxx_MOFILES)
1104 AC_SUBST(glibcxx_POFILES)
1106 CLOCALE_H=config/locale/gnu/c_locale.h
1107 CLOCALE_CC=config/locale/gnu/c_locale.cc
1108 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1109 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1110 CCOLLATE_CC=config/locale/gnu/collate_members.cc
1111 CCTYPE_CC=config/locale/gnu/ctype_members.cc
1112 CMESSAGES_H=config/locale/gnu/messages_members.h
1113 CMESSAGES_CC=config/locale/gnu/messages_members.cc
1114 CMONEY_CC=config/locale/gnu/monetary_members.cc
1115 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1116 CTIME_H=config/locale/gnu/time_members.h
1117 CTIME_CC=config/locale/gnu/time_members.cc
1118 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
1119 ;;
1120 ieee_1003.1-2001)
1121 AC_MSG_RESULT(IEEE 1003.1)
1123 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
1124 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
1125 CCODECVT_H=config/locale/ieee_1003.1-2001/codecvt_specializations.h
1126 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1127 CCOLLATE_CC=config/locale/generic/collate_members.cc
1128 CCTYPE_CC=config/locale/generic/ctype_members.cc
1129 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
1130 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
1131 CMONEY_CC=config/locale/generic/monetary_members.cc
1132 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1133 CTIME_H=config/locale/generic/time_members.h
1134 CTIME_CC=config/locale/generic/time_members.cc
1135 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
1136 ;;
1137 esac
1139 # This is where the testsuite looks for locale catalogs, using the
1140 # -DLOCALEDIR define during testsuite compilation.
1141 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
1142 AC_SUBST(glibcxx_localedir)
1144 # A standalone libintl (e.g., GNU libintl) may be in use.
1145 if test $USE_NLS = yes; then
1146 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
1147 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
1148 fi
1149 if test $USE_NLS = yes; then
1150 AC_DEFINE(_GLIBCXX_USE_NLS)
1151 fi
1153 AC_SUBST(USE_NLS)
1154 AC_SUBST(CLOCALE_H)
1155 AC_SUBST(CCODECVT_H)
1156 AC_SUBST(CMESSAGES_H)
1157 AC_SUBST(CCODECVT_CC)
1158 AC_SUBST(CCOLLATE_CC)
1159 AC_SUBST(CCTYPE_CC)
1160 AC_SUBST(CMESSAGES_CC)
1161 AC_SUBST(CMONEY_CC)
1162 AC_SUBST(CNUMERIC_CC)
1163 AC_SUBST(CTIME_H)
1164 AC_SUBST(CTIME_CC)
1165 AC_SUBST(CLOCALE_CC)
1166 AC_SUBST(CLOCALE_INTERNAL_H)
1167 ])
1170 dnl
1171 dnl Check for which std::allocator base class to use. The choice is
1172 dnl mapped from a subdirectory of include/ext.
1173 dnl
1174 dnl Default is new.
1175 dnl
1176 AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
1177 AC_MSG_CHECKING([for std::allocator base class to use])
1178 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[=KIND],
1179 [use KIND for target std::allocator base],
1180 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1182 # If they didn't use this option switch, or if they specified --enable
1183 # with no specific model, we'll have to look for one. If they
1184 # specified --disable (???), do likewise.
1185 if test $enable_libstdcxx_allocator = no ||
1186 test $enable_libstdcxx_allocator = yes;
1187 then
1188 enable_libstdcxx_allocator=auto
1189 fi
1191 # Either a known package, or "auto". Auto implies the default choice
1192 # for a particular platform.
1193 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
1195 # Probe for host-specific support if no specific model is specified.
1196 # Default to "new".
1197 if test $enable_libstdcxx_allocator_flag = auto; then
1198 case ${target_os} in
1199 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
1200 enable_libstdcxx_allocator_flag=mt
1201 ;;
1202 *)
1203 enable_libstdcxx_allocator_flag=new
1204 ;;
1205 esac
1206 fi
1207 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
1210 # Set configure bits for specified locale package
1211 case ${enable_libstdcxx_allocator_flag} in
1212 bitmap)
1213 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
1214 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
1215 ;;
1216 malloc)
1217 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
1218 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
1219 ;;
1220 mt)
1221 ALLOCATOR_H=config/allocator/mt_allocator_base.h
1222 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
1223 ;;
1224 new)
1225 ALLOCATOR_H=config/allocator/new_allocator_base.h
1226 ALLOCATOR_NAME=__gnu_cxx::new_allocator
1227 ;;
1228 pool)
1229 ALLOCATOR_H=config/allocator/pool_allocator_base.h
1230 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
1231 ;;
1232 esac
1234 AC_SUBST(ALLOCATOR_H)
1235 AC_SUBST(ALLOCATOR_NAME)
1236 ])
1239 dnl
1240 dnl Check for whether the Boost-derived checks should be turned on.
1241 dnl
1242 dnl --enable-concept-checks turns them on.
1243 dnl --disable-concept-checks leaves them off.
1244 dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
1245 dnl Where DEFAULT is either `yes' or `no'.
1246 dnl
1247 AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
1248 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
1249 if test $enable_concept_checks = yes; then
1250 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS)
1251 fi
1252 ])
1255 dnl
1256 dnl Check for which I/O library to use: stdio, or something specific.
1257 dnl
1258 dnl Default is stdio.
1259 dnl
1260 AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
1261 AC_MSG_CHECKING([for underlying I/O to use])
1262 GLIBCXX_ENABLE(cstdio,stdio,[=PACKAGE],
1263 [use target-specific I/O package], [permit stdio])
1265 # Now that libio has been removed, you can have any color you want as long
1266 # as it's black. This is one big no-op until other packages are added, but
1267 # showing the framework never hurts.
1268 case ${enable_cstdio} in
1269 stdio)
1270 CSTDIO_H=config/io/c_io_stdio.h
1271 BASIC_FILE_H=config/io/basic_file_stdio.h
1272 BASIC_FILE_CC=config/io/basic_file_stdio.cc
1273 AC_MSG_RESULT(stdio)
1274 ;;
1275 esac
1277 AC_SUBST(CSTDIO_H)
1278 AC_SUBST(BASIC_FILE_H)
1279 AC_SUBST(BASIC_FILE_CC)
1280 ])
1283 dnl
1284 dnl Check for "unusual" flags to pass to the compiler while building.
1285 dnl
1286 dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
1287 dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
1288 dnl --disable-cxx-flags passes nothing.
1289 dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
1290 dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
1291 dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
1292 dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
1293 dnl If "default flags" is an empty string, the effect is the same
1294 dnl as --disable or --enable=no.
1295 dnl
1296 AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
1297 AC_MSG_CHECKING([for extra compiler flags for building])
1298 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
1299 [pass compiler FLAGS when building library],
1300 [case "x$enable_cxx_flags" in
1301 xno | x) enable_cxx_flags= ;;
1302 x-*) ;;
1303 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1304 esac])
1306 # Run through flags (either default or command-line) and set anything
1307 # extra (e.g., #defines) that must accompany particular g++ options.
1308 if test -n "$enable_cxx_flags"; then
1309 for f in $enable_cxx_flags; do
1310 case "$f" in
1311 -fhonor-std) ;;
1312 -*) ;;
1313 *) # and we're trying to pass /what/ exactly?
1314 AC_MSG_ERROR([compiler flags start with a -]) ;;
1315 esac
1316 done
1317 fi
1319 EXTRA_CXX_FLAGS="$enable_cxx_flags"
1320 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
1321 AC_SUBST(EXTRA_CXX_FLAGS)
1322 ])
1325 dnl
1326 dnl Check for wide character support. Has the same effect as the option
1327 dnl in gcc's configure, but in a form that autoconf can mess with.
1328 dnl
1329 dnl --enable-c-mbchar requests all the wchar_t stuff.
1330 dnl --disable-c-mbchar doesn't.
1331 dnl + Usage: GLIBCXX_ENABLE_C_MBCHAR[(DEFAULT)]
1332 dnl Where DEFAULT is either `yes' or `no'.
1333 dnl
1334 AC_DEFUN([GLIBCXX_ENABLE_C_MBCHAR], [
1335 GLIBCXX_ENABLE(c-mbchar,$1,,[enable multibyte (wide) characters])
1336 # Option parsed, now other scripts can test enable_c_mbchar for yes/no.
1337 ])
1340 dnl
1341 dnl Check to see if debugging libraries are to be built.
1342 dnl
1343 dnl --enable-libstdcxx-debug
1344 dnl builds a separate set of debugging libraries in addition to the
1345 dnl normal (shared, static) libstdc++ binaries.
1346 dnl
1347 dnl --disable-libstdcxx-debug
1348 dnl builds only one (non-debug) version of libstdc++.
1349 dnl
1350 dnl --enable-libstdcxx-debug-flags=FLAGS
1351 dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
1352 dnl
1353 dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
1354 dnl Where DEFAULT is either `yes' or `no'.
1355 dnl
1356 AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
1357 AC_MSG_CHECKING([for additional debug build])
1358 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
1359 AC_MSG_RESULT($enable_libstdcxx_debug)
1360 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
1361 ])
1364 dnl
1365 dnl Check for explicit debug flags.
1366 dnl
1367 dnl --enable-libstdcxx-debug-flags='-O1'
1368 dnl is a general method for passing flags to be used when
1369 dnl building debug libraries with --enable-debug.
1370 dnl
1371 dnl --disable-libstdcxx-debug-flags does nothing.
1372 dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
1373 dnl If "default flags" is an empty string, the effect is the same
1374 dnl as --disable or --enable=no.
1375 dnl
1376 AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
1377 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
1378 [pass compiler FLAGS when building debug library],
1379 [case "x$enable_libstdcxx_debug_flags" in
1380 xno | x) enable_libstdcxx_debug_flags= ;;
1381 x-*) ;;
1382 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
1383 esac])
1385 # Option parsed, now set things appropriately
1386 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
1387 AC_SUBST(DEBUG_FLAGS)
1389 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
1390 ])
1393 dnl
1394 dnl Check if the user only wants a freestanding library implementation.
1395 dnl
1396 dnl --disable-hosted-libstdcxx will turn off most of the library build,
1397 dnl installing only the headers required by [17.4.1.3] and the language
1398 dnl support library. More than that will be built (to keep the Makefiles
1399 dnl conveniently clean), but not installed.
1400 dnl
1401 dnl Sets:
1402 dnl is_hosted (yes/no)
1403 dnl
1404 dnl Defines:
1405 dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
1406 dnl
1407 AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
1408 AC_ARG_ENABLE([hosted-libstdcxx],
1409 AC_HELP_STRING([--disable-hosted-libstdcxx],
1410 [only build freestanding C++ runtime support]),,
1411 [case "$host" in
1412 arm*-*-symbianelf*)
1413 enable_hosted_libstdcxx=no
1414 ;;
1415 *)
1416 enable_hosted_libstdcxx=yes
1417 ;;
1418 esac])
1419 if test "$enable_hosted_libstdcxx" = no; then
1420 AC_MSG_NOTICE([Only freestanding libraries will be built])
1421 is_hosted=no
1422 hosted_define=0
1423 enable_abi_check=no
1424 enable_libstdcxx_pch=no
1425 else
1426 is_hosted=yes
1427 hosted_define=1
1428 fi
1429 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
1430 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
1431 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
1432 ])
1435 dnl
1436 dnl Check for template specializations for the 'long long' type extension.
1437 dnl The result determines only whether 'long long' I/O is enabled; things
1438 dnl like numeric_limits<> specializations are always available.
1439 dnl
1440 dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
1441 dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
1442 dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
1443 dnl Where DEFAULT is either `yes' or `no'.
1444 dnl
1445 AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
1446 GLIBCXX_ENABLE(long-long,$1,,[enables I/O support for 'long long'])
1447 if test $enable_long_long = yes; then
1448 AC_DEFINE(_GLIBCXX_USE_LONG_LONG)
1449 fi
1450 ])
1453 dnl
1454 dnl Check to see if building and using a C++ precompiled header can be done.
1455 dnl
1456 dnl --enable-libstdcxx-pch=yes
1457 dnl default, this shows intent to use stdc++.h.gch If it looks like it
1458 dnl may work, after some light-hearted attempts to puzzle out compiler
1459 dnl support, flip bits on in include/Makefile.am
1460 dnl
1461 dnl --disable-libstdcxx-pch
1462 dnl turns off attempts to use or build stdc++.h.gch.
1463 dnl
1464 dnl Substs:
1465 dnl glibcxx_PCHFLAGS
1466 dnl
1467 AC_DEFUN([GLIBCXX_ENABLE_PCH], [
1468 AC_MSG_CHECKING([for enabled PCH])
1469 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
1470 AC_MSG_RESULT([$enable_libstdcxx_pch])
1472 if test $enable_libstdcxx_pch = yes; then
1473 AC_CACHE_CHECK([for compiler with PCH support],
1474 [glibcxx_cv_prog_CXX_pch],
1475 [ac_save_CXXFLAGS="$CXXFLAGS"
1476 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
1477 AC_LANG_SAVE
1478 AC_LANG_CPLUSPLUS
1479 echo '#include <math.h>' > conftest.h
1480 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
1481 -o conftest.h.gch 1>&5 2>&1 &&
1482 echo '#error "pch failed"' > conftest.h &&
1483 echo '#include "conftest.h"' > conftest.cc &&
1484 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
1485 then
1486 glibcxx_cv_prog_CXX_pch=yes
1487 else
1488 glibcxx_cv_prog_CXX_pch=no
1489 fi
1490 rm -f conftest*
1491 CXXFLAGS=$ac_save_CXXFLAGS
1492 AC_LANG_RESTORE
1493 ])
1494 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
1495 fi
1497 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
1498 if test $enable_libstdcxx_pch = yes; then
1499 glibcxx_PCHFLAGS="-include bits/stdc++.h"
1500 else
1501 glibcxx_PCHFLAGS=""
1502 fi
1503 AC_SUBST(glibcxx_PCHFLAGS)
1504 ])
1507 dnl
1508 dnl Check for exception handling support. If an explicit enable/disable
1509 dnl sjlj exceptions is given, we don't have to detect. Otherwise the
1510 dnl target may or may not support call frame exceptions.
1511 dnl
1512 dnl --enable-sjlj-exceptions forces the use of builtin setjmp.
1513 dnl --disable-sjlj-exceptions forces the use of call frame unwinding.
1514 dnl Neither one forces an attempt at detection.
1515 dnl
1516 dnl Defines:
1517 dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it
1518 dnl
1519 AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [
1520 AC_MSG_CHECKING([for exception model to use])
1521 AC_LANG_SAVE
1522 AC_LANG_CPLUSPLUS
1523 GLIBCXX_ENABLE(sjlj-exceptions,auto,,
1524 [force use of builtin_setjmp for exceptions],
1525 [permit yes|no|auto])
1527 if test $enable_sjlj_exceptions = auto; then
1528 # Botheration. Now we've got to detect the exception model. Link tests
1529 # against libgcc.a are problematic since we've not been given proper -L
1530 # bits for single-tree newlib and libgloss.
1531 #
1532 # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style.
1533 cat > conftest.$ac_ext << EOF
1534 [#]line __oline__ "configure"
1535 struct S { ~S(); };
1536 void bar();
1537 void foo()
1538 {
1539 S s;
1540 bar();
1541 }
1542 EOF
1543 old_CXXFLAGS="$CXXFLAGS"
1544 CXXFLAGS=-S
1545 if AC_TRY_EVAL(ac_compile); then
1546 if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
1547 enable_sjlj_exceptions=yes
1548 elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
1549 enable_sjlj_exceptions=no
1550 fi
1551 fi
1552 CXXFLAGS="$old_CXXFLAGS"
1553 rm -f conftest*
1554 fi
1556 # This is a tad weird, for hysterical raisins. We have to map enable/disable
1557 # to two different models.
1558 case $enable_sjlj_exceptions in
1559 yes)
1560 AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1,
1561 [Define if the compiler is configured for setjmp/longjmp exceptions.])
1562 ac_exception_model_name=sjlj
1563 ;;
1564 no)
1565 ac_exception_model_name="call frame"
1566 ;;
1567 *)
1568 AC_MSG_ERROR([unable to detect exception model])
1569 ;;
1570 esac
1571 AC_LANG_RESTORE
1572 AC_MSG_RESULT($ac_exception_model_name)
1573 ])
1576 dnl
1577 dnl Add version tags to symbols in shared library (or not), additionally
1578 dnl marking other symbols as private/local (or not).
1579 dnl
1580 dnl --enable-symvers=style adds a version script to the linker call when
1581 dnl creating the shared library. The choice of version script is
1582 dnl controlled by 'style'.
1583 dnl --disable-symvers does not.
1584 dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
1585 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
1586 dnl choose a default style based on linker characteristics. Passing
1587 dnl 'no' disables versioning.
1588 dnl
1589 AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
1591 GLIBCXX_ENABLE(symvers,$1,[=STYLE],
1592 [enables symbol versioning of the shared library],
1593 [permit yes|no|gnu])
1595 # If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
1596 # don't know enough about $LD to do tricks...
1597 AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
1598 # FIXME The following test is too strict, in theory.
1599 if test $enable_shared = no ||
1600 test "x$LD" = x ||
1601 test x$glibcxx_gnu_ld_version = x; then
1602 enable_symvers=no
1603 fi
1605 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
1606 if test $enable_symvers != no; then
1607 AC_MSG_CHECKING([for shared libgcc])
1608 ac_save_CFLAGS="$CFLAGS"
1609 CFLAGS=' -lgcc_s'
1610 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
1611 CFLAGS="$ac_save_CFLAGS"
1612 if test $glibcxx_shared_libgcc = no; then
1613 cat > conftest.c <<EOF
1614 int main (void) { return 0; }
1615 EOF
1616 changequote(,)dnl
1617 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
1618 -shared -shared-libgcc -o conftest.so \
1619 conftest.c -v 2>&1 >/dev/null \
1620 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
1621 changequote([,])dnl
1622 rm -f conftest.c conftest.so
1623 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
1624 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
1625 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
1626 CFLAGS="$ac_save_CFLAGS"
1627 fi
1628 fi
1629 AC_MSG_RESULT($glibcxx_shared_libgcc)
1630 fi
1632 # For GNU ld, we need at least this version. The format is described in
1633 # GLIBCXX_CHECK_LINKER_FEATURES above.
1634 glibcxx_min_gnu_ld_version=21400
1635 # XXXXXXXXXXX glibcxx_gnu_ld_version=21390
1637 # Check to see if unspecified "yes" value can win, given results above.
1638 # Change "yes" into either "no" or a style name.
1639 if test $enable_symvers = yes; then
1640 if test $with_gnu_ld = yes &&
1641 test $glibcxx_shared_libgcc = yes;
1642 then
1643 if test $glibcxx_gnu_ld_version -ge $glibcxx_min_gnu_ld_version ; then
1644 enable_symvers=gnu
1645 else
1646 # The right tools, the right setup, but too old. Fallbacks?
1647 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
1648 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
1649 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
1650 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
1651 if test $glibcxx_gnu_ld_version -ge 21200 ; then
1652 # Globbing fix is present, proper block support is not.
1653 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.])
1654 dnl enable_symvers=???
1655 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1656 enable_symvers=no
1657 else
1658 # 2.11 or older.
1659 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1660 enable_symvers=no
1661 fi
1662 fi
1663 else
1664 # just fail for now
1665 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but])
1666 AC_MSG_WARN([=== either you are not using a supported linker, or you are])
1667 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).])
1668 AC_MSG_WARN([=== Symbol versioning will be disabled.])
1669 enable_symvers=no
1670 fi
1671 fi
1673 # Everything parsed; figure out what file to use.
1674 case $enable_symvers in
1675 no)
1676 SYMVER_MAP=config/linker-map.dummy
1677 ;;
1678 gnu)
1679 SYMVER_MAP=config/linker-map.gnu
1680 AC_DEFINE(_GLIBCXX_SYMVER)
1681 ;;
1682 esac
1684 AC_SUBST(SYMVER_MAP)
1685 AC_SUBST(port_specific_symbol_files)
1686 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_VERSIONED_SHLIB, test $enable_symvers != no)
1687 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
1688 ])
1691 dnl
1692 dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
1693 dnl We must stage the required headers so that they will be installed
1694 dnl with the library (unlike libgcc, the STL implementation is provided
1695 dnl solely within headers). Since we must not inject random user-space
1696 dnl macro names into user-provided C++ code, we first stage into <file>-in
1697 dnl and process to <file> with an output command. The reason for a two-
1698 dnl stage process here is to correctly handle $srcdir!=$objdir without
1699 dnl having to write complex code (the sed commands to clean the macro
1700 dnl namespace are complex and fragile enough as it is). We must also
1701 dnl add a relative path so that -I- is supported properly.
1702 dnl
1703 dnl Substs:
1704 dnl glibcxx_thread_h
1705 dnl
1706 dnl Defines:
1707 dnl HAVE_GTHR_DEFAULT
1708 dnl
1709 AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
1710 AC_MSG_CHECKING([for thread model used by GCC])
1711 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
1712 AC_MSG_RESULT([$target_thread_file])
1714 if test $target_thread_file != single; then
1715 AC_DEFINE(HAVE_GTHR_DEFAULT)
1716 fi
1718 glibcxx_thread_h=gthr-$target_thread_file.h
1720 dnl Check for __GTHREADS define.
1721 gthread_file=${toplevel_srcdir}/gcc/${glibcxx_thread_h}
1722 if grep __GTHREADS $gthread_file >/dev/null 2>&1 ; then
1723 enable_thread=yes
1724 else
1725 enable_thread=no
1726 fi
1728 AC_SUBST(glibcxx_thread_h)
1729 ])
1732 # Check whether LC_MESSAGES is available in <locale.h>.
1733 # Ulrich Drepper <drepper@cygnus.com>, 1995.
1734 #
1735 # This file file be copied and used freely without restrictions. It can
1736 # be used in projects which are not available under the GNU Public License
1737 # but which still want to provide support for the GNU gettext functionality.
1738 # Please note that the actual code is *not* freely available.
1740 # serial 1
1741 AC_DEFUN([AC_LC_MESSAGES], [
1742 AC_CHECK_HEADER(locale.h, [
1743 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
1744 [AC_TRY_LINK([#include <locale.h>], [return LC_MESSAGES],
1745 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
1746 if test $ac_cv_val_LC_MESSAGES = yes; then
1747 AC_DEFINE(HAVE_LC_MESSAGES)
1748 fi
1749 ])
1750 ])
1753 sinclude([../libtool.m4])
1754 dnl The lines below arrange for aclocal not to bring an installed
1755 dnl libtool.m4 into aclocal.m4, while still arranging for automake to
1756 dnl add a definition of LIBTOOL to Makefile.in.
1757 ifelse(,,,[AC_SUBST(LIBTOOL)
1758 AC_DEFUN([AM_PROG_LIBTOOL])
1759 AC_DEFUN([AC_LIBTOOL_DLOPEN])
1760 AC_DEFUN([AC_PROG_LD])
1761 ])
1763 dnl vim:et:ts=2:sw=2