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libstdc++: Make certain exceptions transaction_safe.
[thirdparty/gcc.git] / libstdc++-v3 / acinclude.m4
CommitLineData
11764568 1dnl
2dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
3dnl
4dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
5dnl end of configure. This lets tested variables be reassigned, and the
6dnl conditional will depend on the final state of the variable. For a simple
7dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
8dnl
9m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
2ad02b6c 10AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
11764568 11 m4_divert_text([glibcxx_diversion],dnl
12 AM_CONDITIONAL([$1],[$2])
13 )dnl
14])dnl
2ad02b6c 15AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
11764568 16
17
68224f8d 18dnl
19dnl Check to see what architecture and operating system we are compiling
20dnl for. Also, if architecture- or OS-specific flags are required for
21dnl compilation, pick them up here.
22dnl
2ad02b6c 23AC_DEFUN([GLIBCXX_CHECK_HOST], [
68224f8d 24 . $glibcxx_srcdir/configure.host
2ad02b6c 25 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
26 AC_MSG_NOTICE([OS config directory is $os_include_dir])
68224f8d 27])
28
68224f8d 29dnl
30dnl Initialize the rest of the library configury. At this point we have
31dnl variables like $host.
8400ab1c 32dnl
68224f8d 33dnl Sets:
4591e20f 34dnl SUBDIRS
68224f8d 35dnl Substs:
36dnl glibcxx_builddir (absolute path)
37dnl glibcxx_srcdir (absolute path)
630d52ca 38dnl toplevel_builddir (absolute path)
68224f8d 39dnl toplevel_srcdir (absolute path)
40dnl with_cross_host
41dnl with_newlib
42dnl with_target_subdir
43dnl plus
44dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45dnl - default settings for all AM_CONFITIONAL test variables
46dnl - lots of tools, like CC and CXX
8400ab1c 47dnl
2ad02b6c 48AC_DEFUN([GLIBCXX_CONFIGURE], [
4591e20f 49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
5924b28e 52 m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/filesystem doc po testsuite python])
4591e20f 53 SUBDIRS='glibcxx_SUBDIRS'
54
acf7a6bc 55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
5a64d8cf 58 glibcxx_builddir=`${PWDCMD-pwd}`
acf7a6bc 59 case $srcdir in
68224f8d 60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
acf7a6bc 62 esac
630d52ca 63 toplevel_builddir=${glibcxx_builddir}/..
68224f8d 64 toplevel_srcdir=${glibcxx_srcdir}/..
5a64d8cf 65 AC_SUBST(glibcxx_builddir)
66 AC_SUBST(glibcxx_srcdir)
630d52ca 67 AC_SUBST(toplevel_builddir)
68224f8d 68 AC_SUBST(toplevel_srcdir)
acf7a6bc 69
68224f8d 70 # We use these options to decide which functions to include. They are
71 # set from the top level.
72 AC_ARG_WITH([target-subdir],
73 AC_HELP_STRING([--with-target-subdir=SUBDIR],
dca89719 74 [configuring in a subdirectory]))
68224f8d 75
76 AC_ARG_WITH([cross-host],
77 AC_HELP_STRING([--with-cross-host=HOST],
dca89719 78 [configuring with a cross compiler]))
68224f8d 79
80 AC_ARG_WITH([newlib],
81 AC_HELP_STRING([--with-newlib],
dca89719 82 [assume newlib as a system C library]))
68224f8d 83
68224f8d 84 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
85 # available). Uncomment the next line to force a particular method.
86 AC_PROG_LN_S
87 #LN_S='cp -p'
88
f1f1b9ae 89 AC_CHECK_TOOL(AS, as)
90 AC_CHECK_TOOL(AR, ar)
c45e0e39 91 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
b9e8095b 92
f1f1b9ae 93 AM_MAINTAINER_MODE
b9e8095b 94
11764568 95 # Set up safe default values for all subsequent AM_CONDITIONAL tests
96 # which are themselves conditionally expanded.
97 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
98 ## other macros from doing the same. This should be automated.) -pme
d1fde434 99
eb43532a 100 # Check for C library flavor since GNU/Linux platforms use different
101 # configuration directories depending on the C library in use.
ee085235 102 AC_EGREP_CPP([_using_uclibc], [
103 #include <stdio.h>
104 #if __UCLIBC__
105 _using_uclibc
106 #endif
107 ], uclibc=yes, uclibc=no)
108
11c2a83c 109 AC_EGREP_CPP([_using_bionic], [
110 #include <stdio.h>
111 #if __BIONIC__
112 _using_bionic
113 #endif
114 ], bionic=yes, bionic=no)
115
68224f8d 116 # Find platform-specific directories containing configuration info.
117 # Also possibly modify flags used elsewhere, as needed by the platform.
5a64d8cf 118 GLIBCXX_CHECK_HOST
b9e8095b 119])
120
121
c21bc234 122dnl
457683de 123dnl Tests for newer compiler features, or features that are present in newer
124dnl compiler versions but not older compiler versions still in use, should
125dnl be placed here.
b9e8095b 126dnl
68224f8d 127dnl Defines:
128dnl WERROR='-Werror' if requested and possible; g++'s that lack the
129dnl new inlining code or the new system_header pragma will die on -Werror.
130dnl Leave it out by default and use maint-mode to use it.
131dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
132dnl compiler supports it and the user has not requested debug mode.
b9386e63 133dnl
2ad02b6c 134AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
c51c23c3 135 # All these tests are for C++; save the language and the compiler flags.
457683de 136 # The CXXFLAGS thing is suspicious, but based on similar bits previously
5a64d8cf 137 # found in GLIBCXX_CONFIGURE.
c51c23c3 138 AC_LANG_SAVE
139 AC_LANG_CPLUSPLUS
140 ac_test_CXXFLAGS="${CXXFLAGS+set}"
141 ac_save_CXXFLAGS="$CXXFLAGS"
c51c23c3 142
211ecbdf 143 # Check for maintainer-mode bits.
144 if test x"$USE_MAINTAINER_MODE" = xno; then
145 WERROR=''
9c6a106c 146 else
211ecbdf 147 WERROR='-Werror'
9c6a106c 148 fi
149
c21bc234 150 # Check for -ffunction-sections -fdata-sections
151 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
acccde02 152 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
153 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
c21bc234 154 if test "$ac_test_CXXFLAGS" = set; then
155 CXXFLAGS="$ac_save_CXXFLAGS"
156 else
157 # this is the suspicious part
158 CXXFLAGS=''
159 fi
7f713ccf 160 if test x"$ac_fdsections" = x"yes"; then
c21bc234 161 SECTION_FLAGS='-ffunction-sections -fdata-sections'
162 fi
163 AC_MSG_RESULT($ac_fdsections)
164
c51c23c3 165 AC_LANG_RESTORE
9c6a106c 166 AC_SUBST(WERROR)
c21bc234 167 AC_SUBST(SECTION_FLAGS)
b9e8095b 168])
169
c21bc234 170
34f4e39e 171dnl
172dnl Check if the assembler used supports disabling generation of hardware
173dnl capabilities. This is only supported by Sun as at the moment.
174dnl
175dnl Defines:
176dnl HWCAP_FLAGS='-Wa,-nH' if possible.
177dnl
178AC_DEFUN([GLIBCXX_CHECK_ASSEMBLER_HWCAP], [
179 test -z "$HWCAP_FLAGS" && HWCAP_FLAGS=''
180
55caca34 181 # Restrict the test to Solaris, other assemblers (e.g. AIX as) have -nH
182 # with a different meaning.
183 case ${target_os} in
184 solaris2*)
185 ac_save_CFLAGS="$CFLAGS"
186 CFLAGS="$CFLAGS -Wa,-nH"
187
188 AC_MSG_CHECKING([for as that supports -Wa,-nH])
189 AC_TRY_COMPILE([], [return 0;], [ac_hwcap_flags=yes],[ac_hwcap_flags=no])
190 if test "$ac_hwcap_flags" = "yes"; then
191 HWCAP_FLAGS="-Wa,-nH $HWCAP_FLAGS"
192 fi
193 AC_MSG_RESULT($ac_hwcap_flags)
194
195 CFLAGS="$ac_save_CFLAGS"
196 ;;
197 esac
34f4e39e 198
199 AC_SUBST(HWCAP_FLAGS)
200])
201
202
c21bc234 203dnl
06f58ac6 204dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
205dnl the native linker is in use, all variables will be defined to something
206dnl safe (like an empty string).
207dnl
68224f8d 208dnl Defines:
209dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
bc12299b 210dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
68224f8d 211dnl LD (as a side effect of testing)
212dnl Sets:
213dnl with_gnu_ld
09ffaa43 214dnl glibcxx_ld_is_gold (set to "no" or "yes")
68224f8d 215dnl glibcxx_gnu_ld_version (possibly)
216dnl
217dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
218dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
c21bc234 219dnl
2ad02b6c 220AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
06f58ac6 221 # If we're not using GNU ld, then there's no point in even trying these
222 # tests. Check for that first. We should have already tested for gld
223 # by now (in libtool), but require it now just to be safe...
13bad5d9 224 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
225 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
06f58ac6 226 AC_REQUIRE([AC_PROG_LD])
68224f8d 227 AC_REQUIRE([AC_PROG_AWK])
445cdc9a 228
00c7100f 229 # The name set by libtool depends on the version of libtool. Shame on us
230 # for depending on an impl detail, but c'est la vie. Older versions used
231 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
232 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
233 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
234 # set (hence we're using an older libtool), then set it.
235 if test x${with_gnu_ld+set} != xset; then
236 if test x${ac_cv_prog_gnu_ld+set} != xset; then
237 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
238 with_gnu_ld=no
239 else
240 with_gnu_ld=$ac_cv_prog_gnu_ld
241 fi
242 fi
243
244 # Start by getting the version number. I think the libtool test already
245 # does some of this, but throws away the result.
09ffaa43 246 glibcxx_ld_is_gold=no
a8c6eff1 247 if test x"$with_gnu_ld" = x"yes"; then
248 AC_MSG_CHECKING([for ld version])
249 changequote(,)
09ffaa43 250 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
251 glibcxx_ld_is_gold=yes
252 fi
8dc52806 253 ldver=`$LD --version 2>/dev/null |
8b501d36 254 sed -e 's/GNU gold /GNU ld /;s/GNU ld version /GNU ld /;s/GNU ld ([^)]*) /GNU ld /;s/GNU ld \([0-9.][0-9.]*\).*/\1/; q'`
a8c6eff1 255 changequote([,])
256 glibcxx_gnu_ld_version=`echo $ldver | \
dca89719 257 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
a8c6eff1 258 AC_MSG_RESULT($glibcxx_gnu_ld_version)
259 fi
00c7100f 260
445cdc9a 261 # Set --gc-sections.
09ffaa43 262 glibcxx_have_gc_sections=no
263 if test "$glibcxx_ld_is_gold" = "yes"; then
264 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
265 glibcxx_have_gc_sections=yes
266 fi
267 else
268 glibcxx_gcsections_min_ld=21602
dca89719 269 if test x"$with_gnu_ld" = x"yes" &&
3afdc8c9 270 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
09ffaa43 271 glibcxx_have_gc_sections=yes
272 fi
273 fi
274 if test "$glibcxx_have_gc_sections" = "yes"; then
3afdc8c9 275 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
276 # NB: This flag only works reliably after 2.16.1. Configure tests
277 # for this are difficult, so hard wire a value that should work.
06f58ac6 278
06f58ac6 279 ac_test_CFLAGS="${CFLAGS+set}"
280 ac_save_CFLAGS="$CFLAGS"
86bb9627 281 CFLAGS='-Wl,--gc-sections'
06f58ac6 282
283 # Check for -Wl,--gc-sections
284 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
e3acaece 285 AC_TRY_LINK([ int one(void) { return 1; }
286 int two(void) { return 2; }
287 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
78e1dded 288 if test "$ac_gcsections" = "yes"; then
289 rm -f conftest.c
290 touch conftest.c
291 if $CC -c conftest.c; then
292 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
293 grep "Warning: gc-sections option ignored" > /dev/null; then
294 ac_gcsections=no
295 fi
296 fi
297 rm -f conftest.c conftest.o conftest
298 fi
e3acaece 299 if test "$ac_gcsections" = "yes"; then
300 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
301 fi
302 AC_MSG_RESULT($ac_gcsections)
303
06f58ac6 304 if test "$ac_test_CFLAGS" = set; then
305 CFLAGS="$ac_save_CFLAGS"
306 else
307 # this is the suspicious part
308 CFLAGS=''
309 fi
445cdc9a 310 fi
985550e9 311
bc12299b 312 # Set -z,relro.
fd9a63cd 313 # Note this is only for shared objects.
bc12299b 314 ac_ld_relro=no
315 if test x"$with_gnu_ld" = x"yes"; then
316 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
317 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
318 if test -n "$cxx_z_relo"; then
319 OPT_LDFLAGS="-Wl,-z,relro"
320 ac_ld_relro=yes
321 fi
322 AC_MSG_RESULT($ac_ld_relro)
323 fi
324
445cdc9a 325 # Set linker optimization flags.
7f713ccf 326 if test x"$with_gnu_ld" = x"yes"; then
13bad5d9 327 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
06f58ac6 328 fi
445cdc9a 329
c21bc234 330 AC_SUBST(SECTION_LDFLAGS)
06f58ac6 331 AC_SUBST(OPT_LDFLAGS)
c21bc234 332])
333
334
b9e8095b 335dnl
68224f8d 336dnl Check for headers for, and arguments to, the setrlimit() function.
337dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
7f713ccf 338dnl
68224f8d 339dnl Defines:
dca89719 340dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
ac7a2146 341dnl various HAVE_LIMIT_* for individual limit names
7f713ccf 342dnl
2ad02b6c 343AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
bd30e718 344 AC_MSG_CHECKING([for RLIMIT_$1])
68224f8d 345 AC_TRY_COMPILE(
346 [#include <unistd.h>
347 #include <sys/time.h>
348 #include <sys/resource.h>
349 ],
350 [ int f = RLIMIT_$1 ; ],
351 [glibcxx_mresult=1], [glibcxx_mresult=0])
ac7a2146 352 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
dca89719 353 [Only used in build directory testsuite_hooks.h.])
bd30e718 354 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
355 AC_MSG_RESULT($res)
68224f8d 356])
357
2ad02b6c 358AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
68224f8d 359 setrlimit_have_headers=yes
360 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
dca89719 361 [],
362 [setrlimit_have_headers=no])
68224f8d 363 # If don't have the headers, then we can't run the tests now, and we
364 # won't be seeing any of these during testsuite compilation.
365 if test $setrlimit_have_headers = yes; then
366 # Can't do these in a loop, else the resulting syntax is wrong.
367 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
368 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
369 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
370 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
ac7a2146 371 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
68224f8d 372
373 # Check for rlimit, setrlimit.
6992582a 374 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
68224f8d 375 AC_TRY_COMPILE(
dca89719 376 [#include <unistd.h>
377 #include <sys/time.h>
378 #include <sys/resource.h>
379 ],
380 [struct rlimit r;
381 setrlimit(0, &r);],
382 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
68224f8d 383 ])
384 fi
385
ac7a2146 386 AC_MSG_CHECKING([for testsuite resource limits support])
6992582a 387 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
ac7a2146 388 ac_res_limits=yes
d64903a9 389 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
dca89719 390 [Define if using setrlimit to set resource limits during
391 "make check"])
68224f8d 392 else
ac7a2146 393 ac_res_limits=no
68224f8d 394 fi
ac7a2146 395 AC_MSG_RESULT($ac_res_limits)
7f713ccf 396])
397
398
7f713ccf 399dnl
68224f8d 400dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
401dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
7f713ccf 402dnl
2ad02b6c 403AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
4f37153a 404
405 AC_LANG_SAVE
406 AC_LANG_CPLUSPLUS
407 ac_save_CXXFLAGS="$CXXFLAGS"
408 CXXFLAGS="$CXXFLAGS -fno-exceptions"
409
bd30e718 410 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
68224f8d 411 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
4f37153a 412 GCC_TRY_COMPILE_OR_LINK(
68224f8d 413 [#include <sys/stat.h>],
414 [struct stat buffer;
415 fstat(0, &buffer);
416 S_ISREG(buffer.st_mode);],
417 [glibcxx_cv_S_ISREG=yes],
418 [glibcxx_cv_S_ISREG=no])
419 ])
420 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
4f37153a 421 GCC_TRY_COMPILE_OR_LINK(
68224f8d 422 [#include <sys/stat.h>],
423 [struct stat buffer;
424 fstat(0, &buffer);
425 S_IFREG & buffer.st_mode;],
426 [glibcxx_cv_S_IFREG=yes],
427 [glibcxx_cv_S_IFREG=no])
428 ])
bd30e718 429 res=no
68224f8d 430 if test $glibcxx_cv_S_ISREG = yes; then
dca89719 431 AC_DEFINE(HAVE_S_ISREG, 1,
432 [Define if S_IFREG is available in <sys/stat.h>.])
bd30e718 433 res=S_ISREG
68224f8d 434 elif test $glibcxx_cv_S_IFREG = yes; then
d64903a9 435 AC_DEFINE(HAVE_S_IFREG, 1,
dca89719 436 [Define if S_IFREG is available in <sys/stat.h>.])
bd30e718 437 res=S_IFREG
68224f8d 438 fi
bd30e718 439 AC_MSG_RESULT($res)
4f37153a 440
441 CXXFLAGS="$ac_save_CXXFLAGS"
442 AC_LANG_RESTORE
b9e8095b 443])
444
445
401f263f 446dnl
68224f8d 447dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
401f263f 448dnl
2ad02b6c 449AC_DEFUN([GLIBCXX_CHECK_POLL], [
4f37153a 450
451 AC_LANG_SAVE
452 AC_LANG_CPLUSPLUS
453 ac_save_CXXFLAGS="$CXXFLAGS"
454 CXXFLAGS="$CXXFLAGS -fno-exceptions"
455
bd30e718 456 AC_MSG_CHECKING([for poll])
68224f8d 457 AC_CACHE_VAL(glibcxx_cv_POLL, [
4f37153a 458 GCC_TRY_COMPILE_OR_LINK(
68224f8d 459 [#include <poll.h>],
460 [struct pollfd pfd[1];
461 pfd[0].events = POLLIN;
462 poll(pfd, 1, 0);],
463 [glibcxx_cv_POLL=yes],
464 [glibcxx_cv_POLL=no])
465 ])
466 if test $glibcxx_cv_POLL = yes; then
d64903a9 467 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
68224f8d 468 fi
bd30e718 469 AC_MSG_RESULT($glibcxx_cv_POLL)
4f37153a 470
471 CXXFLAGS="$ac_save_CXXFLAGS"
472 AC_LANG_RESTORE
68224f8d 473])
474
475
476dnl
477dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
478dnl
2ad02b6c 479AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
4f37153a 480
481 AC_LANG_SAVE
482 AC_LANG_CPLUSPLUS
483 ac_save_CXXFLAGS="$CXXFLAGS"
484 CXXFLAGS="$CXXFLAGS -fno-exceptions"
485
bd30e718 486 AC_MSG_CHECKING([for writev])
68224f8d 487 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
4f37153a 488 GCC_TRY_COMPILE_OR_LINK(
68224f8d 489 [#include <sys/uio.h>],
490 [struct iovec iov[2];
491 writev(0, iov, 0);],
492 [glibcxx_cv_WRITEV=yes],
493 [glibcxx_cv_WRITEV=no])
494 ])
495 if test $glibcxx_cv_WRITEV = yes; then
d64903a9 496 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
68224f8d 497 fi
bd30e718 498 AC_MSG_RESULT($glibcxx_cv_WRITEV)
4f37153a 499
500 CXXFLAGS="$ac_save_CXXFLAGS"
501 AC_LANG_RESTORE
68224f8d 502])
503
504
440c107f 505dnl
506dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
e061cb0f 507dnl Also check whether int64_t is actually a typedef to long or long long.
440c107f 508dnl
2ad02b6c 509AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
e061cb0f 510
511 AC_LANG_SAVE
512 AC_LANG_CPLUSPLUS
513
bd30e718 514 AC_MSG_CHECKING([for int64_t])
440c107f 515 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
516 AC_TRY_COMPILE(
517 [#include <stdint.h>],
518 [int64_t var;],
519 [glibcxx_cv_INT64_T=yes],
520 [glibcxx_cv_INT64_T=no])
521 ])
e061cb0f 522
440c107f 523 if test $glibcxx_cv_INT64_T = yes; then
d64903a9 524 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
e061cb0f 525 AC_MSG_RESULT($glibcxx_cv_INT64_T)
526
527 AC_MSG_CHECKING([for int64_t as long])
528 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
529 AC_TRY_COMPILE(
dca89719 530 [#include <stdint.h>
531 template<typename, typename> struct same { enum { value = -1 }; };
532 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
533 int array[same<int64_t, long>::value];], [],
e061cb0f 534 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
535 ])
536
537 if test $glibcxx_cv_int64_t_long = yes; then
538 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
539 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
540 fi
541
542 AC_MSG_CHECKING([for int64_t as long long])
543 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
544 AC_TRY_COMPILE(
dca89719 545 [#include <stdint.h>
546 template<typename, typename> struct same { enum { value = -1 }; };
547 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
548 int array[same<int64_t, long long>::value];], [],
e061cb0f 549 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
550 ])
551
552 if test $glibcxx_cv_int64_t_long_long = yes; then
553 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
554 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
555 fi
440c107f 556 fi
e061cb0f 557
558 AC_LANG_RESTORE
440c107f 559])
560
561
562dnl
563dnl Check whether LFS support is available.
564dnl
2ad02b6c 565AC_DEFUN([GLIBCXX_CHECK_LFS], [
14636c22 566 AC_LANG_SAVE
f6c9c179 567 AC_LANG_CPLUSPLUS
568 ac_save_CXXFLAGS="$CXXFLAGS"
dca89719 569 CXXFLAGS="$CXXFLAGS -fno-exceptions"
bd30e718 570 AC_MSG_CHECKING([for LFS support])
440c107f 571 AC_CACHE_VAL(glibcxx_cv_LFS, [
4f37153a 572 GCC_TRY_COMPILE_OR_LINK(
14636c22 573 [#include <unistd.h>
574 #include <stdio.h>
b1e0564a 575 #include <sys/stat.h>
14636c22 576 ],
c92ce3f5 577 [FILE* fp;
578 fopen64("t", "w");
579 fseeko64(fp, 0, SEEK_CUR);
580 ftello64(fp);
b1e0564a 581 lseek64(1, 0, SEEK_CUR);
582 struct stat64 buf;
583 fstat64(1, &buf);],
440c107f 584 [glibcxx_cv_LFS=yes],
585 [glibcxx_cv_LFS=no])
586 ])
587 if test $glibcxx_cv_LFS = yes; then
d64903a9 588 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
440c107f 589 fi
bd30e718 590 AC_MSG_RESULT($glibcxx_cv_LFS)
f6c9c179 591 CXXFLAGS="$ac_save_CXXFLAGS"
592 AC_LANG_RESTORE
440c107f 593])
594
595
06450f58 596dnl
597dnl Check for whether a fully dynamic basic_string implementation should
598dnl be turned on, that does not put empty objects in per-process static
599dnl memory (mostly useful together with shared memory allocators, see PR
600dnl libstdc++/16612 for details).
601dnl
a34764b1 602dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
603dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
604dnl otherwise undefined
06450f58 605dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
606dnl Where DEFAULT is either `yes' or `no'.
607dnl
608AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
609 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
610 if test $enable_fully_dynamic_string = yes; then
a34764b1 611 enable_fully_dynamic_string_def=1
612 else
613 enable_fully_dynamic_string_def=0
06450f58 614 fi
a34764b1 615 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
616 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
06450f58 617])
618
619
68224f8d 620dnl
621dnl Does any necessary configuration of the testsuite directory. Generates
622dnl the testsuite_hooks.h header.
623dnl
624dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
625dnl
626dnl Sets:
dca89719 627dnl enable_abi_check
c37e7a9d 628dnl GLIBCXX_TEST_WCHAR_T
629dnl GLIBCXX_TEST_THREAD
68224f8d 630dnl Substs:
631dnl baseline_dir
b88a1a12 632dnl baseline_subdir_switch
68224f8d 633dnl
2ad02b6c 634AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
10f7a2cb 635 if $GLIBCXX_IS_NATIVE ; then
ac7a2146 636 # Do checks for resource limit functions.
68224f8d 637 GLIBCXX_CHECK_SETRLIMIT
638
639 # Look for setenv, so that extended locale tests can be performed.
640 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
10f7a2cb 641 fi
3795d5fd 642
10f7a2cb 643 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
644 test $enable_symvers != no; then
645 case "$host" in
646 *-*-cygwin*)
dca89719 647 enable_abi_check=no ;;
10f7a2cb 648 *)
dca89719 649 enable_abi_check=yes ;;
10f7a2cb 650 esac
3795d5fd 651 else
652 # Only build this as native, since automake does not understand
653 # CXX_FOR_BUILD.
654 enable_abi_check=no
68224f8d 655 fi
dca89719 656
68224f8d 657 # Export file names for ABI checking.
da177fdf 658 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
68224f8d 659 AC_SUBST(baseline_dir)
b88a1a12 660 baseline_subdir_switch="$abi_baseline_subdir_switch"
661 AC_SUBST(baseline_subdir_switch)
68224f8d 662])
663
664
dca89719 665dnl
6dbb3e64 666dnl Does any necessary configuration for docbook in the docs directory.
dca89719 667dnl
668dnl XSLTPROC must be set before this
669dnl
670dnl Sets:
671dnl glibcxx_stylesheets
672dnl Substs:
673dnl XSL_STYLE_DIR
674dnl
675AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
676
6dbb3e64 677AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
dca89719 678glibcxx_stylesheets=no
679if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude http://docbook.sourceforge.net/release/xsl-ns/current/xhtml-1_1/docbook.xsl - 2>/dev/null; then
680 glibcxx_stylesheets=yes
681fi
682AC_MSG_RESULT($glibcxx_stylesheets)
683
684AC_MSG_CHECKING([for local stylesheet directory])
685glibcxx_local_stylesheets=no
686if test x"$glibcxx_stylesheets" = x"yes"; then
687 if test -d /usr/share/sgml/docbook/xsl-ns-stylesheets; then
688 glibcxx_local_stylesheets=yes
689 XSL_STYLE_DIR=/usr/share/sgml/docbook/xsl-ns-stylesheets
690 fi
691 if test -d /usr/share/xml/docbook/stylesheet/docbook-xsl-ns; then
692 glibcxx_local_stylesheets=yes
693 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/docbook-xsl-ns
694 fi
1c47bb7a 695 if test -d /usr/share/xml/docbook/stylesheet/nwalsh5/current; then
696 glibcxx_local_stylesheets=yes
697 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/nwalsh5/current
698 fi
dca89719 699fi
700AC_MSG_RESULT($glibcxx_local_stylesheets)
701
702if test x"$glibcxx_local_stylesheets" = x"yes"; then
703 AC_SUBST(XSL_STYLE_DIR)
704 AC_MSG_NOTICE($XSL_STYLE_DIR)
705else
706 glibcxx_stylesheets=no
707fi
6dbb3e64 708
709# Check for epub3 dependencies.
710AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
711glibcxx_epub_stylesheets=no
712if test x"$glibcxx_local_stylesheets" = x"yes"; then
b927314b 713 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
6dbb3e64 714 glibcxx_epub_stylesheets=yes
715 fi
716fi
717AC_MSG_RESULT($glibcxx_epub_stylesheets)
b927314b 718AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
6dbb3e64 719
dca89719 720])
721
722
68224f8d 723dnl
724dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
725dnl
726dnl Substs:
727dnl GLIBCXX_INCLUDES
728dnl TOPLEVEL_INCLUDES
68224f8d 729dnl
2ad02b6c 730AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
2eb169cd 731 # Used for every C++ compile we perform.
732 GLIBCXX_INCLUDES="\
733-I$glibcxx_builddir/include/$host_alias \
734-I$glibcxx_builddir/include \
735-I$glibcxx_srcdir/libsupc++"
68224f8d 736
2eb169cd 737 # For Canadian crosses, pick this up too.
68224f8d 738 if test $CANADIAN = yes; then
c0d1c48c 739 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
68224f8d 740 fi
741
2eb169cd 742 # Stuff in the actual top level. Currently only used by libsupc++ to
e59be7e3 743 # get unwind* headers from the libgcc dir.
744 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
745 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
68224f8d 746
747 # Now, export this to all the little Makefiles....
748 AC_SUBST(GLIBCXX_INCLUDES)
749 AC_SUBST(TOPLEVEL_INCLUDES)
68224f8d 750])
751
752
753dnl
754dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
755dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
756dnl
757dnl Substs:
758dnl OPTIMIZE_CXXFLAGS
759dnl WARN_FLAGS
760dnl
2ad02b6c 761AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
68224f8d 762 # Optimization flags that are probably a good idea for thrill-seekers. Just
763 # uncomment the lines below and make, everything else is ready to go...
074377fd 764 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
68224f8d 765 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
68224f8d 766 AC_SUBST(OPTIMIZE_CXXFLAGS)
767
413e9930 768 WARN_FLAGS='-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi'
68224f8d 769 AC_SUBST(WARN_FLAGS)
770])
771
772
773dnl
774dnl All installation directory information is determined here.
775dnl
776dnl Substs:
777dnl gxx_install_dir
778dnl glibcxx_prefixdir
779dnl glibcxx_toolexecdir
780dnl glibcxx_toolexeclibdir
781dnl
782dnl Assumes cross_compiling bits already done, and with_cross_host in
783dnl particular.
784dnl
0bf9691e 785dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
717b8f50 786dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
2ad02b6c 787AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
68224f8d 788 glibcxx_toolexecdir=no
789 glibcxx_toolexeclibdir=no
790 glibcxx_prefixdir=$prefix
791
792 AC_MSG_CHECKING([for gxx-include-dir])
793 AC_ARG_WITH([gxx-include-dir],
794 AC_HELP_STRING([--with-gxx-include-dir=DIR],
dca89719 795 [installation directory for include files]),
68224f8d 796 [case "$withval" in
797 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
798 no) gxx_include_dir=no ;;
799 *) gxx_include_dir=$withval ;;
800 esac],
801 [gxx_include_dir=no])
802 AC_MSG_RESULT($gxx_include_dir)
803
804 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
805 AC_ARG_ENABLE([version-specific-runtime-libs],
806 AC_HELP_STRING([--enable-version-specific-runtime-libs],
dca89719 807 [Specify that runtime libraries should be installed in a compiler-specific directory]),
68224f8d 808 [case "$enableval" in
809 yes) version_specific_libs=yes ;;
810 no) version_specific_libs=no ;;
811 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
812 esac],
813 [version_specific_libs=no])
814 AC_MSG_RESULT($version_specific_libs)
815
816 # Default case for install directory for include files.
817 if test $version_specific_libs = no && test $gxx_include_dir = no; then
0bf9691e 818 gxx_include_dir='include/c++/${gcc_version}'
dca89719 819 if test -n "$with_cross_host" &&
820 test x"$with_cross_host" != x"no"; then
0bf9691e 821 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
822 else
823 gxx_include_dir='${prefix}/'"$gxx_include_dir"
824 fi
68224f8d 825 fi
826
827 # Version-specific runtime libs processing.
828 if test $version_specific_libs = yes; then
829 # Need the gcc compiler version to know where to install libraries
830 # and header files if --enable-version-specific-runtime-libs option
949aa2c6 831 # is selected. FIXME: these variables are misnamed, there are
832 # no executables installed in _toolexecdir or _toolexeclibdir.
68224f8d 833 if test x"$gxx_include_dir" = x"no"; then
b6ca54bb 834 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
68224f8d 835 fi
949aa2c6 836 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
b6ca54bb 837 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
68224f8d 838 fi
839
840 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
841 # Install a library built with a cross compiler in tooldir, not libdir.
842 if test x"$glibcxx_toolexecdir" = x"no"; then
843 if test -n "$with_cross_host" &&
844 test x"$with_cross_host" != x"no"; then
f4a06a64 845 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
846 glibcxx_toolexeclibdir='${toolexecdir}/lib'
68224f8d 847 else
949aa2c6 848 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
f4a06a64 849 glibcxx_toolexeclibdir='${libdir}'
68224f8d 850 fi
f4a06a64 851 multi_os_directory=`$CXX -print-multi-os-directory`
68224f8d 852 case $multi_os_directory in
853 .) ;; # Avoid trailing /.
854 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
855 esac
856 fi
857
858 AC_MSG_CHECKING([for install location])
859 AC_MSG_RESULT($gxx_include_dir)
860
861 AC_SUBST(glibcxx_prefixdir)
862 AC_SUBST(gxx_include_dir)
863 AC_SUBST(glibcxx_toolexecdir)
864 AC_SUBST(glibcxx_toolexeclibdir)
865])
866
867
868dnl
869dnl GLIBCXX_ENABLE
870dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
871dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
872dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
873dnl
2da704e6 874dnl See manual/appendix_porting.html#appendix.porting.build_hacking for
875dnl documentation.
68224f8d 876dnl
877m4_define([GLIBCXX_ENABLE],[dnl
878m4_define([_g_switch],[--enable-$1])dnl
dae1a11c 879m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
880 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
68224f8d 881 m4_bmatch([$5],
882 [^permit ],
883 [[
884 case "$enableval" in
885 m4_bpatsubst([$5],[permit ])) ;;
886 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
dca89719 887 dnl Idea for future: generate a URL pointing to
888 dnl "onlinedocs/configopts.html#whatever"
68224f8d 889 esac
890 ]],
891 [^$],
892 [[
893 case "$enableval" in
894 yes|no) ;;
895 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
896 esac
897 ]],
898 [[$5]]),
899 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
900m4_undefine([_g_switch])dnl
901m4_undefine([_g_help])dnl
902])
903
904
905dnl
906dnl Check for ISO/IEC 9899:1999 "C99" support.
907dnl
908dnl --enable-c99 defines _GLIBCXX_USE_C99
909dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
910dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
911dnl Where DEFAULT is either `yes' or `no'.
912dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
913dnl
2ad02b6c 914AC_DEFUN([GLIBCXX_ENABLE_C99], [
68224f8d 915 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
916
c586733c 917 if test x"$enable_c99" = x"yes"; then
bdb62e6a 918 AC_LANG_SAVE
919 AC_LANG_CPLUSPLUS
920
921 # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__
922 # undefined may cause fake C99 facilities, like pre-standard snprintf,
923 # to be spuriously enabled.
924 ac_save_CXXFLAGS="$CXXFLAGS"
925 CXXFLAGS="$CXXFLAGS -std=c++98"
926 ac_save_LIBS="$LIBS"
927 ac_save_gcc_no_link="$gcc_no_link"
928
929 if test x$gcc_no_link != xyes; then
930 # Use -fno-exceptions to that the C driver can link these tests without
931 # hitting undefined references to personality routines.
932 CXXFLAGS="$CXXFLAGS -fno-exceptions"
933 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
934 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
935 gcc_no_link=yes
936 ])
937 fi
c586733c 938
bdb62e6a 939 # Check for the existence of <math.h> functions used if C99 is enabled.
940 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++98])
941 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx98, [
942 GCC_TRY_COMPILE_OR_LINK(
943 [#include <math.h>
944 volatile double d1, d2;
945 volatile int i;],
946 [i = fpclassify(d1);
947 i = isfinite(d1);
948 i = isinf(d1);
949 i = isnan(d1);
950 i = isnormal(d1);
951 i = signbit(d1);
952 i = isgreater(d1, d2);
953 i = isgreaterequal(d1, d2);
954 i = isless(d1, d2);
955 i = islessequal(d1, d2);
956 i = islessgreater(d1, d2);
957 i = islessgreater(d1, d2);
958 i = isunordered(d1, d2);
959 ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no])
960 ])
961 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx98)
962 if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then
963 AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1,
964 [Define if C99 functions or macros in <math.h> should be imported
965 in <cmath> in namespace std for C++98.])
966 fi
68224f8d 967
bdb62e6a 968 # Check for the existence of <complex.h> complex math functions.
969 # This is necessary even though libstdc++ uses the builtin versions
970 # of these functions, because if the builtin cannot be used, a reference
971 # to the library function is emitted.
972 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
973 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
974 if test x"$ac_has_complex_h" = x"yes"; then
975 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++98])
976 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx98, [
977 GCC_TRY_COMPILE_OR_LINK(
978 [#include <complex.h>
979 typedef __complex__ float float_type;
980 typedef __complex__ double double_type;
981 typedef __complex__ long double ld_type;
982 volatile float_type tmpf;
983 volatile double_type tmpd;
984 volatile ld_type tmpld;
985 volatile float f;
986 volatile double d;
987 volatile long double ld;],
988 [f = cabsf(tmpf);
989 f = cargf(tmpf);
990 tmpf = ccosf(tmpf);
991 tmpf = ccoshf(tmpf);
992 tmpf = cexpf(tmpf);
993 tmpf = clogf(tmpf);
994 tmpf = csinf(tmpf);
995 tmpf = csinhf(tmpf);
996 tmpf = csqrtf(tmpf);
997 tmpf = ctanf(tmpf);
998 tmpf = ctanhf(tmpf);
999 tmpf = cpowf(tmpf, tmpf);
1000 tmpf = cprojf(tmpf);
1001 d = cabs(tmpd);
1002 d = carg(tmpd);
1003 tmpd = ccos(tmpd);
1004 tmpd = ccosh(tmpd);
1005 tmpd = cexp(tmpd);
1006 tmpd = clog(tmpd);
1007 tmpd = csin(tmpd);
1008 tmpd = csinh(tmpd);
1009 tmpd = csqrt(tmpd);
1010 tmpd = ctan(tmpd);
1011 tmpd = ctanh(tmpd);
1012 tmpd = cpow(tmpd, tmpd);
1013 tmpd = cproj(tmpd);
1014 ld = cabsl(tmpld);
1015 ld = cargl(tmpld);
1016 tmpld = ccosl(tmpld);
1017 tmpld = ccoshl(tmpld);
1018 tmpld = cexpl(tmpld);
1019 tmpld = clogl(tmpld);
1020 tmpld = csinl(tmpld);
1021 tmpld = csinhl(tmpld);
1022 tmpld = csqrtl(tmpld);
1023 tmpld = ctanl(tmpld);
1024 tmpld = ctanhl(tmpld);
1025 tmpld = cpowl(tmpld, tmpld);
1026 tmpld = cprojl(tmpld);
1027 ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no])
1028 ])
1029 fi
1030 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx98)
1031 if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then
1032 AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1,
1033 [Define if C99 functions in <complex.h> should be used in
1034 <complex> for C++98. Using compiler builtins for these functions
1035 requires corresponding C99 library functions to be present.])
1036 fi
1037
1038 # Check for the existence in <stdio.h> of vscanf, et. al.
1039 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++98])
1040 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx98, [
1041 GCC_TRY_COMPILE_OR_LINK(
1042 [#include <stdio.h>
1043 #include <stdarg.h>
1044 void foo(char* fmt, ...)
1045 {
1046 va_list args; va_start(args, fmt);
1047 vfscanf(stderr, "%i", args);
1048 vscanf("%i", args);
1049 vsnprintf(fmt, 0, "%i", args);
1050 vsscanf(fmt, "%i", args);
1051 snprintf(fmt, 0, "%i");
1052 }], [],
1053 [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no])
757228f3 1054 ])
bdb62e6a 1055 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx98)
1056 if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then
1057 AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1,
1058 [Define if C99 functions or macros in <stdio.h> should be imported
1059 in <cstdio> in namespace std for C++98.])
1060 fi
757228f3 1061
bdb62e6a 1062 # Check for the existence in <wchar.h> of wcstold, etc.
1063 if test x"$ac_has_wchar_h" = xyes &&
1064 test x"$ac_has_wctype_h" = xyes; then
1065 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++98])
1066 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx98, [
1067 AC_TRY_COMPILE([#include <wchar.h>
1068 namespace test
1069 {
1070 using ::wcstold;
1071 using ::wcstoll;
1072 using ::wcstoull;
1073 }
1074 ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no])
1075 ])
1076
1077 # Checks for wide character functions that may not be present.
1078 # Injection of these is wrapped with guard macros.
1079 # NB: only put functions here, instead of immediately above, if
1080 # absolutely necessary.
1081 AC_TRY_COMPILE([#include <wchar.h>
1082 namespace test { using ::vfwscanf; }], [],
1083 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1084
1085 AC_TRY_COMPILE([#include <wchar.h>
1086 namespace test { using ::vswscanf; }], [],
1087 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1088
1089 AC_TRY_COMPILE([#include <wchar.h>
1090 namespace test { using ::vwscanf; }], [],
1091 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1092
1093 AC_TRY_COMPILE([#include <wchar.h>
1094 namespace test { using ::wcstof; }], [],
1095 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1096
1097 AC_TRY_COMPILE([#include <wctype.h>],
1098 [wint_t t; int i = iswblank(t);],
1099 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1100
1101 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx98)
1102 if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then
1103 AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1,
1104 [Define if C99 functions or macros in <wchar.h> should be imported
1105 in <cwchar> in namespace std for C++98.])
1106 fi
1107 fi
90d5bb42 1108
bdb62e6a 1109 # Option parsed, now set things appropriately.
1110 if test x"$glibcxx_cv_c99_math_cxx98" = x"no" ||
1111 test x"$glibcxx_cv_c99_complex_cxx98" = x"no" ||
1112 test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" ||
1113 test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" ||
1114 test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then
1115 enable_c99=no;
1116 else
1117 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1118 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1119 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1120 fi
9253fc43 1121
bdb62e6a 1122 gcc_no_link="$ac_save_gcc_no_link"
1123 LIBS="$ac_save_LIBS"
1124 CXXFLAGS="$ac_save_CXXFLAGS"
1125 AC_LANG_RESTORE
1126
1127 AC_LANG_SAVE
1128 AC_LANG_CPLUSPLUS
1129
1130 # Use -std=c++11 and test again for C99 library feature in C++11 mode.
1131 # For the reasons given above we use -std=c++11 not -std=gnu++11.
1132 ac_save_CXXFLAGS="$CXXFLAGS"
1133 CXXFLAGS="$CXXFLAGS -std=c++11"
1134 ac_save_LIBS="$LIBS"
1135 ac_save_gcc_no_link="$gcc_no_link"
1136
1137 if test x$gcc_no_link != xyes; then
1138 # Use -fno-exceptions to that the C driver can link these tests without
1139 # hitting undefined references to personality routines.
1140 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1141 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
1142 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
1143 gcc_no_link=yes
1144 ])
1145 fi
68224f8d 1146
bdb62e6a 1147 # Check for the existence of <math.h> functions used if C99 is enabled.
1148 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++11])
1149 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx11, [
1150 GCC_TRY_COMPILE_OR_LINK(
1151 [#include <math.h>
1152 volatile double d1, d2;
1153 volatile int i;],
1154 [i = fpclassify(d1);
1155 i = isfinite(d1);
1156 i = isinf(d1);
1157 i = isnan(d1);
1158 i = isnormal(d1);
1159 i = signbit(d1);
1160 i = isgreater(d1, d2);
1161 i = isgreaterequal(d1, d2);
1162 i = isless(d1, d2);
1163 i = islessequal(d1, d2);
1164 i = islessgreater(d1, d2);
1165 i = islessgreater(d1, d2);
1166 i = isunordered(d1, d2);
1167 ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no])
1168 ])
1169 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx11)
1170 if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then
1171 AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1,
1172 [Define if C99 functions or macros in <math.h> should be imported
1173 in <cmath> in namespace std for C++11.])
1174 fi
68224f8d 1175
bdb62e6a 1176 # Check for the existence of <complex.h> complex math functions.
1177 # This is necessary even though libstdc++ uses the builtin versions
1178 # of these functions, because if the builtin cannot be used, a reference
1179 # to the library function is emitted.
1180 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
1181 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1182 if test x"$ac_has_complex_h" = x"yes"; then
1183 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++11])
1184 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx11, [
1185 GCC_TRY_COMPILE_OR_LINK(
1186 [#include <complex.h>
1187 typedef __complex__ float float_type;
1188 typedef __complex__ double double_type;
1189 typedef __complex__ long double ld_type;
1190 volatile float_type tmpf;
1191 volatile double_type tmpd;
1192 volatile ld_type tmpld;
1193 volatile float f;
1194 volatile double d;
1195 volatile long double ld;],
1196 [f = cabsf(tmpf);
1197 f = cargf(tmpf);
1198 tmpf = ccosf(tmpf);
1199 tmpf = ccoshf(tmpf);
1200 tmpf = cexpf(tmpf);
1201 tmpf = clogf(tmpf);
1202 tmpf = csinf(tmpf);
1203 tmpf = csinhf(tmpf);
1204 tmpf = csqrtf(tmpf);
1205 tmpf = ctanf(tmpf);
1206 tmpf = ctanhf(tmpf);
1207 tmpf = cpowf(tmpf, tmpf);
1208 tmpf = cprojf(tmpf);
1209 d = cabs(tmpd);
1210 d = carg(tmpd);
1211 tmpd = ccos(tmpd);
1212 tmpd = ccosh(tmpd);
1213 tmpd = cexp(tmpd);
1214 tmpd = clog(tmpd);
1215 tmpd = csin(tmpd);
1216 tmpd = csinh(tmpd);
1217 tmpd = csqrt(tmpd);
1218 tmpd = ctan(tmpd);
1219 tmpd = ctanh(tmpd);
1220 tmpd = cpow(tmpd, tmpd);
1221 tmpd = cproj(tmpd);
1222 ld = cabsl(tmpld);
1223 ld = cargl(tmpld);
1224 tmpld = ccosl(tmpld);
1225 tmpld = ccoshl(tmpld);
1226 tmpld = cexpl(tmpld);
1227 tmpld = clogl(tmpld);
1228 tmpld = csinl(tmpld);
1229 tmpld = csinhl(tmpld);
1230 tmpld = csqrtl(tmpld);
1231 tmpld = ctanl(tmpld);
1232 tmpld = ctanhl(tmpld);
1233 tmpld = cpowl(tmpld, tmpld);
1234 tmpld = cprojl(tmpld);
1235 ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no])
1236 ])
1237 fi
1238 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx11)
1239 if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then
1240 AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1,
1241 [Define if C99 functions in <complex.h> should be used in
1242 <complex> for C++11. Using compiler builtins for these functions
1243 requires corresponding C99 library functions to be present.])
1244 fi
1245
1246 # Check for the existence in <stdio.h> of vscanf, et. al.
1247 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++11])
1248 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx11, [
1249 GCC_TRY_COMPILE_OR_LINK(
1250 [#include <stdio.h>
1251 #include <stdarg.h>
1252 void foo(char* fmt, ...)
1253 {
1254 va_list args; va_start(args, fmt);
1255 vfscanf(stderr, "%i", args);
1256 vscanf("%i", args);
1257 vsnprintf(fmt, 0, "%i", args);
1258 vsscanf(fmt, "%i", args);
1259 snprintf(fmt, 0, "%i");
1260 }], [],
1261 [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no])
1262 ])
1263 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx11)
1264 if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then
1265 AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1,
1266 [Define if C99 functions or macros in <stdio.h> should be imported
1267 in <cstdio> in namespace std for C++11.])
1268 fi
1269
1270 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1271 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++11])
1272 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx11, [
1273 GCC_TRY_COMPILE_OR_LINK(
1274 [#include <stdlib.h>
1275 volatile float f;
1276 volatile long double ld;
1277 volatile unsigned long long ll;
1278 lldiv_t mydivt;],
1279 [char* tmp;
1280 f = strtof("gnu", &tmp);
1281 ld = strtold("gnu", &tmp);
1282 ll = strtoll("gnu", &tmp, 10);
1283 ll = strtoull("gnu", &tmp, 10);
1284 ll = llabs(10);
1285 mydivt = lldiv(10,1);
1286 ll = mydivt.quot;
1287 ll = mydivt.rem;
1288 ll = atoll("10");
1289 _Exit(0);
1290 ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no])
1291 ])
1292 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx11)
1293 if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then
1294 AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1,
1295 [Define if C99 functions or macros in <stdlib.h> should be imported
1296 in <cstdlib> in namespace std for C++11.])
1297 fi
1298
1299 # Check for the existence in <wchar.h> of wcstold, etc.
1300 if test x"$ac_has_wchar_h" = xyes &&
1301 test x"$ac_has_wctype_h" = xyes; then
1302 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++11])
1303 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx11, [
1304 AC_TRY_COMPILE([#include <wchar.h>
1305 namespace test
1306 {
1307 using ::wcstold;
1308 using ::wcstoll;
1309 using ::wcstoull;
1310 }
1311 ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no])
1312 ])
1313
1314 # Checks for wide character functions that may not be present.
1315 # Injection of these is wrapped with guard macros.
1316 # NB: only put functions here, instead of immediately above, if
1317 # absolutely necessary.
1318 AC_TRY_COMPILE([#include <wchar.h>
1319 namespace test { using ::vfwscanf; }], [],
1320 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1321
1322 AC_TRY_COMPILE([#include <wchar.h>
1323 namespace test { using ::vswscanf; }], [],
1324 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1325
1326 AC_TRY_COMPILE([#include <wchar.h>
1327 namespace test { using ::vwscanf; }], [],
1328 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1329
1330 AC_TRY_COMPILE([#include <wchar.h>
1331 namespace test { using ::wcstof; }], [],
1332 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1333
1334 AC_TRY_COMPILE([#include <wctype.h>],
1335 [wint_t t; int i = iswblank(t);],
1336 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1337
1338 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx11)
1339 if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then
1340 AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1,
1341 [Define if C99 functions or macros in <wchar.h> should be imported
1342 in <cwchar> in namespace std for C++11.])
1343 fi
1344 fi
1345
1346 gcc_no_link="$ac_save_gcc_no_link"
1347 LIBS="$ac_save_LIBS"
1348 CXXFLAGS="$ac_save_CXXFLAGS"
1349 AC_LANG_RESTORE
dca89719 1350 fi
c586733c 1351
1352 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1353 AC_MSG_RESULT($enable_c99)
401f263f 1354])
1355
1356
4971b9a8 1357dnl
99e43922 1358dnl Check for clock_gettime, nanosleep and sched_yield, used in the
f1ff5c18 1359dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1360dnl in the C++11 standard.
4971b9a8 1361dnl
99e43922 1362dnl --enable-libstdcxx-time
1363dnl --enable-libstdcxx-time=yes
1364dnl checks for the availability of monotonic and realtime clocks,
f1ff5c18 1365dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
1366dnl links in the latter.
99e43922 1367dnl --enable-libstdcxx-time=rt
f1ff5c18 1368dnl also searches (and, if needed, links) librt. Note that this is
2da704e6 1369dnl not always desirable because, in glibc 2.16 and earlier, for
1370dnl example, in turn it triggers the linking of libpthread too,
1371dnl which activates locking,
82af6a35 1372dnl a large overhead for single-thread programs.
99e43922 1373dnl --enable-libstdcxx-time=no
1374dnl --disable-libstdcxx-time
d6182d17 1375dnl disables the checks completely
1376dnl
5b2ebdb8 1377dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1378dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1379dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1380dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1381dnl
99e43922 1382AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
d6182d17 1383
2da704e6 1384 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
d6182d17 1385 [use KIND for check type],
1386 [permit yes|no|rt])
4971b9a8 1387
1388 AC_LANG_SAVE
1389 AC_LANG_CPLUSPLUS
1390 ac_save_CXXFLAGS="$CXXFLAGS"
1391 CXXFLAGS="$CXXFLAGS -fno-exceptions"
ad3e2295 1392 ac_save_LIBS="$LIBS"
1393
ad7af939 1394 ac_has_clock_monotonic=no
1395 ac_has_clock_realtime=no
2da704e6 1396 ac_has_nanosleep=no
1397 ac_has_sched_yield=no
1398
1399 if test x"$enable_libstdcxx_time" = x"auto"; then
1400
1401 case "${target_os}" in
1402 cygwin*)
1403 ac_has_nanosleep=yes
1404 ;;
1405 darwin*)
1406 ac_has_nanosleep=yes
1407 ac_has_sched_yield=yes
1408 ;;
1409 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
1410 AC_MSG_CHECKING([for at least GNU libc 2.17])
1411 AC_TRY_COMPILE(
1412 [#include <features.h>],
1413 [
1414 #if ! __GLIBC_PREREQ(2, 17)
1415 #error
1416 #endif
1417 ],
1418 [glibcxx_glibc217=yes], [glibcxx_glibc217=no])
1419 AC_MSG_RESULT($glibcxx_glibc217)
1420
1421 if test x"$glibcxx_glibc217" = x"yes"; then
1422 ac_has_clock_monotonic=yes
1423 ac_has_clock_realtime=yes
1424 fi
1425 ac_has_nanosleep=yes
1426 ac_has_sched_yield=yes
1427 ;;
ce076412 1428 freebsd*|netbsd*|dragonfly*)
2da704e6 1429 ac_has_clock_monotonic=yes
1430 ac_has_clock_realtime=yes
1431 ac_has_nanosleep=yes
1432 ac_has_sched_yield=yes
1433 ;;
1434 openbsd*)
1435 ac_has_clock_monotonic=yes
1436 ac_has_clock_realtime=yes
1437 ac_has_nanosleep=yes
1438 ;;
1439 solaris*)
1440 GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt"
1441 ac_has_clock_monotonic=yes
1442 ac_has_clock_realtime=yes
1443 ac_has_nanosleep=yes
1444 ac_has_sched_yield=yes
1445 ;;
1446 esac
ad3e2295 1447
2da704e6 1448 elif test x"$enable_libstdcxx_time" != x"no"; then
ad3e2295 1449
99e43922 1450 if test x"$enable_libstdcxx_time" = x"rt"; then
d6182d17 1451 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
99e43922 1452 AC_SEARCH_LIBS(nanosleep, [rt posix4])
d6182d17 1453 else
1454 AC_SEARCH_LIBS(clock_gettime, [posix4])
99e43922 1455 AC_SEARCH_LIBS(nanosleep, [posix4])
d6182d17 1456 fi
1457
1458 case "$ac_cv_search_clock_gettime" in
1459 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
99e43922 1460 ;;
1461 esac
1462 case "$ac_cv_search_nanosleep" in
1463 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1464 ;;
1465 esac
1466
1467 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1468
1469 case "$ac_cv_search_sched_yield" in
1470 -lposix4*)
1471 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
2da704e6 1472 ac_has_sched_yield=yes
99e43922 1473 ;;
1474 -lrt*)
1475 if test x"$enable_libstdcxx_time" = x"rt"; then
dca89719 1476 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
2da704e6 1477 ac_has_sched_yield=yes
99e43922 1478 fi
1479 ;;
1480 *)
2da704e6 1481 ac_has_sched_yield=yes
99e43922 1482 ;;
d6182d17 1483 esac
1484
1485 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1486
1487 if test x"$ac_has_unistd_h" = x"yes"; then
1488 AC_MSG_CHECKING([for monotonic clock])
1489 AC_TRY_LINK(
dca89719 1490 [#include <unistd.h>
1491 #include <time.h>
1492 ],
1493 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1494 timespec tp;
1495 #endif
1496 clock_gettime(CLOCK_MONOTONIC, &tp);
1497 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1498
1499 AC_MSG_RESULT($ac_has_clock_monotonic)
1500
d6182d17 1501 AC_MSG_CHECKING([for realtime clock])
1502 AC_TRY_LINK(
dca89719 1503 [#include <unistd.h>
1504 #include <time.h>
1505 ],
1506 [#if _POSIX_TIMERS > 0
1507 timespec tp;
1508 #endif
1509 clock_gettime(CLOCK_REALTIME, &tp);
1510 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
d6182d17 1511
1512 AC_MSG_RESULT($ac_has_clock_realtime)
d6182d17 1513
99e43922 1514 AC_MSG_CHECKING([for nanosleep])
1515 AC_TRY_LINK(
dca89719 1516 [#include <unistd.h>
1517 #include <time.h>
1518 ],
1519 [#if _POSIX_TIMERS > 0
1520 timespec tp;
1521 #endif
1522 nanosleep(&tp, 0);
1523 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
99e43922 1524
1525 AC_MSG_RESULT($ac_has_nanosleep)
1526 fi
d6182d17 1527 fi
1528
bcc6e6bf 1529 if test x"$ac_has_clock_monotonic" != x"yes"; then
1530 case ${target_os} in
1531 linux*)
1532 AC_MSG_CHECKING([for clock_gettime syscall])
1533 AC_TRY_COMPILE(
1534 [#include <unistd.h>
1535 #include <time.h>
1536 #include <sys/syscall.h>
1537 ],
1538 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1539 timespec tp;
1540 #endif
1541 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
1542 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
1543 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no])
1544 AC_MSG_RESULT($ac_has_clock_monotonic_syscall)
1545 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then
1546 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
1547 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ])
1548 ac_has_clock_monotonic=yes
1549 ac_has_clock_realtime=yes
1550 fi;;
1551 esac
1552 fi
1553
4971b9a8 1554 if test x"$ac_has_clock_monotonic" = x"yes"; then
1555 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1556 [ Defined if clock_gettime has monotonic clock support. ])
1557 fi
ad3e2295 1558
4971b9a8 1559 if test x"$ac_has_clock_realtime" = x"yes"; then
1560 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1561 [ Defined if clock_gettime has realtime clock support. ])
1562 fi
ad3e2295 1563
2da704e6 1564 if test x"$ac_has_sched_yield" = x"yes"; then
1565 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1566 [ Defined if sched_yield is available. ])
1567 fi
1568
99e43922 1569 if test x"$ac_has_nanosleep" = x"yes"; then
1570 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1571 [ Defined if nanosleep is available. ])
a2bb721d 1572 else
1573 AC_MSG_CHECKING([for sleep])
1574 AC_TRY_COMPILE([#include <unistd.h>],
1575 [sleep(1)],
1576 [ac_has_sleep=yes],[ac_has_sleep=no])
1577 if test x"$ac_has_sleep" = x"yes"; then
1578 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1579 fi
1580 AC_MSG_RESULT($ac_has_sleep)
1581 AC_MSG_CHECKING([for usleep])
1582 AC_TRY_COMPILE([#include <unistd.h>],
1583 [sleep(1);
1584 usleep(100);],
1585 [ac_has_usleep=yes],[ac_has_usleep=no])
1586 if test x"$ac_has_usleep" = x"yes"; then
1587 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1588 fi
1589 AC_MSG_RESULT($ac_has_usleep)
99e43922 1590 fi
1591
bd83c8ab 1592 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1593 AC_MSG_CHECKING([for Sleep])
1594 AC_TRY_COMPILE([#include <windows.h>],
1595 [Sleep(1)],
1596 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1597 if test x"$ac_has_win32_sleep" = x"yes"; then
1598 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1599 fi
1600 AC_MSG_RESULT($ac_has_win32_sleep)
1601 fi
1602
ad3e2295 1603 AC_SUBST(GLIBCXX_LIBS)
1604
4971b9a8 1605 CXXFLAGS="$ac_save_CXXFLAGS"
ad3e2295 1606 LIBS="$ac_save_LIBS"
4971b9a8 1607 AC_LANG_RESTORE
1608])
1609
1610dnl
f1ff5c18 1611dnl Check for gettimeofday, used in the implementation of 20.11.7
1612dnl [time.clock] in the C++11 standard.
4971b9a8 1613dnl
1614AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
dca89719 1615
d6182d17 1616 AC_MSG_CHECKING([for gettimeofday])
1617
4971b9a8 1618 AC_LANG_SAVE
1619 AC_LANG_CPLUSPLUS
1620 ac_save_CXXFLAGS="$CXXFLAGS"
1621 CXXFLAGS="$CXXFLAGS -fno-exceptions"
dca89719 1622
4971b9a8 1623 ac_has_gettimeofday=no;
1624 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1625 if test x"$ac_has_sys_time_h" = x"yes"; then
1626 AC_MSG_CHECKING([for gettimeofday])
d6182d17 1627 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
4971b9a8 1628 [timeval tv; gettimeofday(&tv, 0);],
1629 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
dca89719 1630
4971b9a8 1631 AC_MSG_RESULT($ac_has_gettimeofday)
1632 fi
dca89719 1633
4971b9a8 1634 if test x"$ac_has_gettimeofday" = x"yes"; then
1635 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1636 [ Defined if gettimeofday is available. ])
1637 fi
dca89719 1638
4971b9a8 1639 CXXFLAGS="$ac_save_CXXFLAGS"
1640 AC_LANG_RESTORE
1641])
1642
d04e5f88 1643dnl
1644dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1645dnl facilities in Chapter 8, "C compatibility".
1646dnl
1647AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1648
1649 AC_LANG_SAVE
1650 AC_LANG_CPLUSPLUS
1651
91f76f05 1652 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1653 # undefined and fake C99 facilities may be spuriously enabled.
1654 ac_save_CXXFLAGS="$CXXFLAGS"
1655 CXXFLAGS="$CXXFLAGS -std=c++98"
1656
d04e5f88 1657 # Check for the existence of <complex.h> complex math functions used
1658 # by tr1/complex.
1659 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1660 ac_c99_complex_tr1=no;
1661 if test x"$ac_has_complex_h" = x"yes"; then
1662 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1663 AC_TRY_COMPILE([#include <complex.h>],
dca89719 1664 [typedef __complex__ float float_type; float_type tmpf;
1665 cacosf(tmpf);
1666 casinf(tmpf);
1667 catanf(tmpf);
1668 cacoshf(tmpf);
1669 casinhf(tmpf);
1670 catanhf(tmpf);
d04e5f88 1671 typedef __complex__ double double_type; double_type tmpd;
dca89719 1672 cacos(tmpd);
1673 casin(tmpd);
1674 catan(tmpd);
1675 cacosh(tmpd);
1676 casinh(tmpd);
1677 catanh(tmpd);
d04e5f88 1678 typedef __complex__ long double ld_type; ld_type tmpld;
dca89719 1679 cacosl(tmpld);
1680 casinl(tmpld);
1681 catanl(tmpld);
1682 cacoshl(tmpld);
1683 casinhl(tmpld);
1684 catanhl(tmpld);
d04e5f88 1685 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1686 fi
1687 AC_MSG_RESULT($ac_c99_complex_tr1)
1688 if test x"$ac_c99_complex_tr1" = x"yes"; then
1689 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
dca89719 1690 [Define if C99 functions in <complex.h> should be used in
1691 <tr1/complex>. Using compiler builtins for these functions
d04e5f88 1692 requires corresponding C99 library functions to be present.])
1693 fi
1694
1695 # Check for the existence of <ctype.h> functions.
1696 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
6992582a 1697 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
d04e5f88 1698 AC_TRY_COMPILE([#include <ctype.h>],
dca89719 1699 [int ch;
1700 int ret;
1701 ret = isblank(ch);
fcbe9d5c 1702 ],[glibcxx_cv_c99_ctype_tr1=yes],
1703 [glibcxx_cv_c99_ctype_tr1=no])
d04e5f88 1704 ])
6992582a 1705 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1706 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
d04e5f88 1707 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
dca89719 1708 [Define if C99 functions in <ctype.h> should be imported in
d04e5f88 1709 <tr1/cctype> in namespace std::tr1.])
1710 fi
1711
1068b7db 1712 # Check for the existence of <fenv.h> functions.
1713 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1714 ac_c99_fenv_tr1=no;
1715 if test x"$ac_has_fenv_h" = x"yes"; then
1716 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1717 AC_TRY_COMPILE([#include <fenv.h>],
dca89719 1718 [int except, mode;
1719 fexcept_t* pflag;
1720 fenv_t* penv;
1721 int ret;
1722 ret = feclearexcept(except);
1723 ret = fegetexceptflag(pflag, except);
1724 ret = feraiseexcept(except);
1725 ret = fesetexceptflag(pflag, except);
1726 ret = fetestexcept(except);
1727 ret = fegetround();
1728 ret = fesetround(mode);
1729 ret = fegetenv(penv);
1730 ret = feholdexcept(penv);
1731 ret = fesetenv(penv);
1732 ret = feupdateenv(penv);
1068b7db 1733 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1734 fi
1735 AC_MSG_RESULT($ac_c99_fenv_tr1)
1736 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1737 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
dca89719 1738 [Define if C99 functions in <fenv.h> should be imported in
1068b7db 1739 <tr1/cfenv> in namespace std::tr1.])
1740 fi
1741
14dd354c 1742 # Check for the existence of <stdint.h> types.
1743 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
6992582a 1744 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
b12cc7df 1745 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
dca89719 1746 #define __STDC_CONSTANT_MACROS
1747 #include <stdint.h>],
1748 [typedef int8_t my_int8_t;
b12cc7df 1749 my_int8_t i8 = INT8_MIN;
1750 i8 = INT8_MAX;
dca89719 1751 typedef int16_t my_int16_t;
b12cc7df 1752 my_int16_t i16 = INT16_MIN;
1753 i16 = INT16_MAX;
dca89719 1754 typedef int32_t my_int32_t;
b12cc7df 1755 my_int32_t i32 = INT32_MIN;
1756 i32 = INT32_MAX;
dca89719 1757 typedef int64_t my_int64_t;
b12cc7df 1758 my_int64_t i64 = INT64_MIN;
1759 i64 = INT64_MAX;
dca89719 1760 typedef int_fast8_t my_int_fast8_t;
b12cc7df 1761 my_int_fast8_t if8 = INT_FAST8_MIN;
1762 if8 = INT_FAST8_MAX;
dca89719 1763 typedef int_fast16_t my_int_fast16_t;
b12cc7df 1764 my_int_fast16_t if16 = INT_FAST16_MIN;
1765 if16 = INT_FAST16_MAX;
dca89719 1766 typedef int_fast32_t my_int_fast32_t;
b12cc7df 1767 my_int_fast32_t if32 = INT_FAST32_MIN;
1768 if32 = INT_FAST32_MAX;
dca89719 1769 typedef int_fast64_t my_int_fast64_t;
b12cc7df 1770 my_int_fast64_t if64 = INT_FAST64_MIN;
1771 if64 = INT_FAST64_MAX;
dca89719 1772 typedef int_least8_t my_int_least8_t;
b12cc7df 1773 my_int_least8_t il8 = INT_LEAST8_MIN;
1774 il8 = INT_LEAST8_MAX;
dca89719 1775 typedef int_least16_t my_int_least16_t;
b12cc7df 1776 my_int_least16_t il16 = INT_LEAST16_MIN;
1777 il16 = INT_LEAST16_MAX;
dca89719 1778 typedef int_least32_t my_int_least32_t;
b12cc7df 1779 my_int_least32_t il32 = INT_LEAST32_MIN;
1780 il32 = INT_LEAST32_MAX;
dca89719 1781 typedef int_least64_t my_int_least64_t;
b12cc7df 1782 my_int_least64_t il64 = INT_LEAST64_MIN;
1783 il64 = INT_LEAST64_MAX;
14dd354c 1784 typedef intmax_t my_intmax_t;
b12cc7df 1785 my_intmax_t im = INTMAX_MAX;
1786 im = INTMAX_MIN;
14dd354c 1787 typedef intptr_t my_intptr_t;
b12cc7df 1788 my_intptr_t ip = INTPTR_MAX;
1789 ip = INTPTR_MIN;
dca89719 1790 typedef uint8_t my_uint8_t;
b12cc7df 1791 my_uint8_t ui8 = UINT8_MAX;
1792 ui8 = UINT8_MAX;
dca89719 1793 typedef uint16_t my_uint16_t;
b12cc7df 1794 my_uint16_t ui16 = UINT16_MAX;
1795 ui16 = UINT16_MAX;
dca89719 1796 typedef uint32_t my_uint32_t;
b12cc7df 1797 my_uint32_t ui32 = UINT32_MAX;
1798 ui32 = UINT32_MAX;
dca89719 1799 typedef uint64_t my_uint64_t;
b12cc7df 1800 my_uint64_t ui64 = UINT64_MAX;
1801 ui64 = UINT64_MAX;
dca89719 1802 typedef uint_fast8_t my_uint_fast8_t;
b12cc7df 1803 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1804 uif8 = UINT_FAST8_MAX;
dca89719 1805 typedef uint_fast16_t my_uint_fast16_t;
b12cc7df 1806 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1807 uif16 = UINT_FAST16_MAX;
dca89719 1808 typedef uint_fast32_t my_uint_fast32_t;
b12cc7df 1809 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1810 uif32 = UINT_FAST32_MAX;
dca89719 1811 typedef uint_fast64_t my_uint_fast64_t;
b12cc7df 1812 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1813 uif64 = UINT_FAST64_MAX;
dca89719 1814 typedef uint_least8_t my_uint_least8_t;
b12cc7df 1815 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1816 uil8 = UINT_LEAST8_MAX;
dca89719 1817 typedef uint_least16_t my_uint_least16_t;
b12cc7df 1818 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1819 uil16 = UINT_LEAST16_MAX;
dca89719 1820 typedef uint_least32_t my_uint_least32_t;
b12cc7df 1821 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1822 uil32 = UINT_LEAST32_MAX;
dca89719 1823 typedef uint_least64_t my_uint_least64_t;
b12cc7df 1824 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1825 uil64 = UINT_LEAST64_MAX;
14dd354c 1826 typedef uintmax_t my_uintmax_t;
b12cc7df 1827 my_uintmax_t uim = UINTMAX_MAX;
1828 uim = UINTMAX_MAX;
14dd354c 1829 typedef uintptr_t my_uintptr_t;
b12cc7df 1830 my_uintptr_t uip = UINTPTR_MAX;
1831 uip = UINTPTR_MAX;
fcbe9d5c 1832 ],[glibcxx_cv_c99_stdint_tr1=yes],
1833 [glibcxx_cv_c99_stdint_tr1=no])
14dd354c 1834 ])
6992582a 1835 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1836 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
14dd354c 1837 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
dca89719 1838 [Define if C99 types in <stdint.h> should be imported in
14dd354c 1839 <tr1/cstdint> in namespace std::tr1.])
1840 fi
1841
bc4c9cb8 1842 # Check for the existence of <math.h> functions.
1843 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
6992582a 1844 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
bc4c9cb8 1845 AC_TRY_COMPILE([#include <math.h>],
dca89719 1846 [typedef double_t my_double_t;
1847 typedef float_t my_float_t;
1848 acosh(0.0);
1849 acoshf(0.0f);
1850 acoshl(0.0l);
1851 asinh(0.0);
1852 asinhf(0.0f);
1853 asinhl(0.0l);
1854 atanh(0.0);
1855 atanhf(0.0f);
1856 atanhl(0.0l);
1857 cbrt(0.0);
1858 cbrtf(0.0f);
1859 cbrtl(0.0l);
1860 copysign(0.0, 0.0);
1861 copysignf(0.0f, 0.0f);
1862 copysignl(0.0l, 0.0l);
1863 erf(0.0);
1864 erff(0.0f);
1865 erfl(0.0l);
1866 erfc(0.0);
1867 erfcf(0.0f);
1868 erfcl(0.0l);
1869 exp2(0.0);
1870 exp2f(0.0f);
1871 exp2l(0.0l);
1872 expm1(0.0);
1873 expm1f(0.0f);
1874 expm1l(0.0l);
1875 fdim(0.0, 0.0);
1876 fdimf(0.0f, 0.0f);
1877 fdiml(0.0l, 0.0l);
1878 fma(0.0, 0.0, 0.0);
1879 fmaf(0.0f, 0.0f, 0.0f);
1880 fmal(0.0l, 0.0l, 0.0l);
1881 fmax(0.0, 0.0);
1882 fmaxf(0.0f, 0.0f);
1883 fmaxl(0.0l, 0.0l);
1884 fmin(0.0, 0.0);
1885 fminf(0.0f, 0.0f);
1886 fminl(0.0l, 0.0l);
1887 hypot(0.0, 0.0);
1888 hypotf(0.0f, 0.0f);
1889 hypotl(0.0l, 0.0l);
1890 ilogb(0.0);
1891 ilogbf(0.0f);
1892 ilogbl(0.0l);
1893 lgamma(0.0);
1894 lgammaf(0.0f);
1895 lgammal(0.0l);
1896 llrint(0.0);
1897 llrintf(0.0f);
1898 llrintl(0.0l);
1899 llround(0.0);
1900 llroundf(0.0f);
1901 llroundl(0.0l);
1902 log1p(0.0);
1903 log1pf(0.0f);
1904 log1pl(0.0l);
1905 log2(0.0);
1906 log2f(0.0f);
1907 log2l(0.0l);
1908 logb(0.0);
1909 logbf(0.0f);
1910 logbl(0.0l);
1911 lrint(0.0);
1912 lrintf(0.0f);
1913 lrintl(0.0l);
1914 lround(0.0);
1915 lroundf(0.0f);
1916 lroundl(0.0l);
1917 nan(0);
1918 nanf(0);
1919 nanl(0);
1920 nearbyint(0.0);
1921 nearbyintf(0.0f);
1922 nearbyintl(0.0l);
1923 nextafter(0.0, 0.0);
1924 nextafterf(0.0f, 0.0f);
1925 nextafterl(0.0l, 0.0l);
1926 nexttoward(0.0, 0.0);
1927 nexttowardf(0.0f, 0.0f);
1928 nexttowardl(0.0l, 0.0l);
1929 remainder(0.0, 0.0);
1930 remainderf(0.0f, 0.0f);
1931 remainderl(0.0l, 0.0l);
1932 remquo(0.0, 0.0, 0);
1933 remquof(0.0f, 0.0f, 0);
1934 remquol(0.0l, 0.0l, 0);
1935 rint(0.0);
1936 rintf(0.0f);
1937 rintl(0.0l);
1938 round(0.0);
1939 roundf(0.0f);
1940 roundl(0.0l);
1941 scalbln(0.0, 0l);
1942 scalblnf(0.0f, 0l);
1943 scalblnl(0.0l, 0l);
1944 scalbn(0.0, 0);
1945 scalbnf(0.0f, 0);
1946 scalbnl(0.0l, 0);
1947 tgamma(0.0);
1948 tgammaf(0.0f);
1949 tgammal(0.0l);
1950 trunc(0.0);
1951 truncf(0.0f);
1952 truncl(0.0l);
6992582a 1953 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
bc4c9cb8 1954 ])
6992582a 1955 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1956 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
bc4c9cb8 1957 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
dca89719 1958 [Define if C99 functions or macros in <math.h> should be imported
1959 in <tr1/cmath> in namespace std::tr1.])
bc4c9cb8 1960 fi
1961
ed9e4356 1962 # Check for the existence of <inttypes.h> functions (NB: doesn't make
c8fb4dda 1963 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
ed9e4356 1964 ac_c99_inttypes_tr1=no;
6992582a 1965 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
ed9e4356 1966 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1967 AC_TRY_COMPILE([#include <inttypes.h>],
dca89719 1968 [intmax_t i, numer, denom, base;
1969 const char* s;
1970 char** endptr;
1971 intmax_t ret = imaxabs(i);
1972 imaxdiv_t dret = imaxdiv(numer, denom);
1973 ret = strtoimax(s, endptr, base);
1974 uintmax_t uret = strtoumax(s, endptr, base);
1975 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
ed9e4356 1976 fi
cdd306be 1977 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1978 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1979 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
dca89719 1980 [Define if C99 functions in <inttypes.h> should be imported in
1981 <tr1/cinttypes> in namespace std::tr1.])
cdd306be 1982 fi
1983
5c67f184 1984 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
c8fb4dda 1985 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
1986 ac_c99_inttypes_wchar_t_tr1=no;
1987 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
1988 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
1989 AC_TRY_COMPILE([#include <inttypes.h>],
dca89719 1990 [intmax_t base;
c8fb4dda 1991 const wchar_t* s;
dca89719 1992 wchar_t** endptr;
1993 intmax_t ret = wcstoimax(s, endptr, base);
1994 uintmax_t uret = wcstoumax(s, endptr, base);
1995 ],[ac_c99_inttypes_wchar_t_tr1=yes],
c8fb4dda 1996 [ac_c99_inttypes_wchar_t_tr1=no])
1997 fi
1998 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
1999 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
2000 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
dca89719 2001 [Define if wchar_t C99 functions in <inttypes.h> should be
c8fb4dda 2002 imported in <tr1/cinttypes> in namespace std::tr1.])
2003 fi
2004
dca89719 2005 # Check for the existence of the <stdbool.h> header.
5d89ab68 2006 AC_CHECK_HEADERS(stdbool.h)
2007
9efaf576 2008 # Check for the existence of the <stdalign.h> header.
2009 AC_CHECK_HEADERS(stdalign.h)
2010
91f76f05 2011 CXXFLAGS="$ac_save_CXXFLAGS"
d04e5f88 2012 AC_LANG_RESTORE
2013])
2014
f8c2da4b 2015dnl
2016dnl Check for uchar.h and usability.
2017dnl
2018AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [
2019
2020 # Test uchar.h.
2021 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no)
2022
2023 AC_LANG_SAVE
2024 AC_LANG_CPLUSPLUS
2025 ac_save_CXXFLAGS="$CXXFLAGS"
2026 CXXFLAGS="$CXXFLAGS -std=c++11"
2027
2028 if test x"$ac_has_uchar_h" = x"yes"; then
2029 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>])
2030 AC_TRY_COMPILE([#include <uchar.h>
2031 #ifdef __STDC_UTF_16__
2032 long i = __STDC_UTF_16__;
2033 #endif
2034 #ifdef __STDC_UTF_32__
2035 long j = __STDC_UTF_32__;
2036 #endif
2037 namespace test
2038 {
2039 using ::c16rtomb;
2040 using ::c32rtomb;
2041 using ::mbrtoc16;
2042 using ::mbrtoc32;
2043 }
2044 ],
2045 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no])
2046 else
2047 ac_c11_uchar_cxx11=no
2048 fi
2049 AC_MSG_RESULT($ac_c11_uchar_cxx11)
2050 if test x"$ac_c11_uchar_cxx11" = x"yes"; then
2051 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1,
2052 [Define if C11 functions in <uchar.h> should be imported into
2053 namespace std in <cuchar>.])
2054 fi
2055
2056 CXXFLAGS="$ac_save_CXXFLAGS"
2057 AC_LANG_RESTORE
2058])
2059
2060
61edee22 2061dnl
6063a383 2062dnl Check whether "/dev/random" and "/dev/urandom" are available for the
61edee22 2063dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
2064dnl
2065AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
2066
6063a383 2067 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
6992582a 2068 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
6063a383 2069 if test -r /dev/random && test -r /dev/urandom; then
f161da2e 2070 ## For MSys environment the test above is detect as false-positive
2071 ## on mingw-targets. So disable it explicit for them.
2072 case ${target_os} in
2073 *mingw*) glibcxx_cv_random_tr1=no ;;
2074 *) glibcxx_cv_random_tr1=yes ;;
2075 esac
6063a383 2076 else
2077 glibcxx_cv_random_tr1=no;
2078 fi
61edee22 2079 ])
6992582a 2080 AC_MSG_RESULT($glibcxx_cv_random_tr1)
6063a383 2081
6992582a 2082 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
61edee22 2083 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
dca89719 2084 [Define if /dev/random and /dev/urandom are available for
61edee22 2085 the random_device of TR1 (Chapter 5.1).])
2086 fi
2087
2088])
d04e5f88 2089
f4a11b09 2090dnl
ab109df4 2091dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
2092dnl
2093AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
2094
6f892aab 2095 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
ab109df4 2096 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
dca89719 2097 [#include <stdio.h>],
2098 [AC_MSG_ERROR([computing EOF failed])])
ab109df4 2099 ])
ab109df4 2100 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
dca89719 2101 [Define to the value of the EOF integer constant.])
ab109df4 2102
6f892aab 2103 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
ab109df4 2104 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
dca89719 2105 [#include <stdio.h>],
2106 [AC_MSG_ERROR([computing SEEK_CUR failed])])
ab109df4 2107 ])
ab109df4 2108 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
dca89719 2109 [Define to the value of the SEEK_CUR integer constant.])
ab109df4 2110
6f892aab 2111 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
ab109df4 2112 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
dca89719 2113 [#include <stdio.h>],
2114 [AC_MSG_ERROR([computing SEEK_END failed])])
ab109df4 2115 ])
ab109df4 2116 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
dca89719 2117 [Define to the value of the SEEK_END integer constant.])
f4a11b09 2118])
2119
b4eb4a64 2120dnl
2121dnl Check whether required C++ overloads are present in <stdio.h>.
2122dnl
2123AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
2124
2125 AC_LANG_SAVE
2126 AC_LANG_CPLUSPLUS
2127
2128 AC_MSG_CHECKING([for gets declaration])
2129 AC_CACHE_VAL(glibcxx_cv_gets, [
2130 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2131 [#include <stdio.h>
2132 namespace test
2133 {
2134 using ::gets;
2135 }
2136 ])],
2137 [glibcxx_cv_gets=yes],
2138 [glibcxx_cv_gets=no]
2139 )])
2140
2141 if test $glibcxx_cv_gets = yes; then
2142 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h>.])
2143 fi
2144 AC_MSG_RESULT($glibcxx_cv_gets)
2145
2146 AC_LANG_RESTORE
2147])
2148
f8b67ee9 2149dnl
2150dnl Check whether required C++11 overloads are present in <math.h>.
2151dnl
2152AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
2153
2154 AC_LANG_SAVE
2155 AC_LANG_CPLUSPLUS
2156 ac_save_CXXFLAGS="$CXXFLAGS"
2157 CXXFLAGS="$CXXFLAGS -std=c++11"
2158
2159 case "$host" in
2160 *-*-solaris2.*)
2161 # Solaris 12 introduced the C++11 <math.h> overloads. A backport to
2162 # a Solaris 11.3 SRU is likely, maybe even a Solaris 10 patch.
2163 AC_MSG_CHECKING([for C++11 <math.h> overloads])
2164 AC_CACHE_VAL(glibcxx_cv_math11_overload, [
2165 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2166 [#include <math.h>
2167 #undef isfinite
2168 namespace std {
2169 inline bool isfinite(float __x)
2170 { return __builtin_isfinite(__x); }
2171 }
2172 ])],
2173 [glibcxx_cv_math11_overload=no],
2174 [glibcxx_cv_math11_overload=yes]
2175 )])
2176
2177 # autoheader cannot handle indented templates.
2178 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO],
2179 [/* Define if all C++11 overloads are available in <math.h>. */
2180#if __cplusplus >= 201103L
2181#undef __CORRECT_ISO_CPP11_MATH_H_PROTO
2182#endif])
2183
2184 if test $glibcxx_cv_math11_overload = yes; then
2185 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO)
2186 fi
2187 AC_MSG_RESULT([$glibcxx_cv_math11_overload])
2188 ;;
b23837e0 2189 *-*-*gnu*)
2190 # If <math.h> defines the obsolete isinf(double) and isnan(double)
2191 # functions (instead of or as well as the C99 generic macros) then we
2192 # can't define std::isinf(double) and std::isnan(double) in <cmath>
2193 # and must use the ones from <math.h> instead.
2194 AC_MSG_CHECKING([for obsolete isinf and isnan functions in <math.h>])
2195 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf_isnan, [
2196 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2197 [#include <math.h>
2198 #undef isinf
2199 #undef isnan
2200 namespace std {
2201 using ::isinf;
2202 bool isinf(float);
2203 bool isinf(long double);
2204 using ::isnan;
2205 bool isnan(float);
2206 bool isnan(long double);
2207 }
2208 using std::isinf;
2209 using std::isnan;
2210 bool b = isinf(0.0) || isnan(0.0);
2211 ])],
2212 [glibcxx_cv_obsolete_isinf_isnan=yes],
2213 [glibcxx_cv_obsolete_isinf_isnan=no]
2214 )])
2215
2216
2217 if test $glibcxx_cv_obsolete_isinf_isnan = yes; then
2218 AC_DEFINE(HAVE_OBSOLETE_ISINF_ISNAN, 1,
2219 [Define if <math.h> defines obsolete isinf and isnan functions.])
2220 fi
2221 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf_isnan])
2222 ;;
f8b67ee9 2223 esac
2224
2225 CXXFLAGS="$ac_save_CXXFLAGS"
2226 AC_LANG_RESTORE
2227])
2228
d0ff4e64 2229dnl
2230dnl Check whether macros, etc are present for <system_error>
2231dnl
2232AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
2233
6992582a 2234m4_pushdef([n_syserr], [1])dnl
2235m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
9539daa0 2236 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
db27024b 2237 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
2238 ECHILD, ENOSPC, EPERM,
2239 ETIMEDOUT, EWOULDBLOCK],
6992582a 2240[m4_pushdef([SYSERR], m4_toupper(syserr))dnl
2241AC_MSG_CHECKING([for syserr])
2242AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
2243AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
2244 [int i = syserr;])],
2245 [glibcxx_cv_system_error[]n_syserr=yes],
2246 [glibcxx_cv_system_error[]n_syserr=no])
2247])
2248AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
2249if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
2250 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
2251fi
2252m4_define([n_syserr], m4_incr(n_syserr))dnl
2253m4_popdef([SYSERR])dnl
2254])
2255m4_popdef([n_syserr])dnl
d0ff4e64 2256])
2257
20752884 2258dnl
68224f8d 2259dnl Check for what type of C headers to use.
2260dnl
2261dnl --enable-cheaders= [does stuff].
2262dnl --disable-cheaders [does not do anything, really].
2263dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
bec9a462 2264dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
68224f8d 2265dnl
2ad02b6c 2266AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
dae1a11c 2267 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
bec9a462 2268 [construct "C" headers for g++], [permit c|c_std|c_global])
68224f8d 2269 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2270
2271 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2272
bec9a462 2273 # Allow overrides to configure.host here.
2274 if test $enable_cheaders = c_global; then
2275 c_compatibility=yes
2276 fi
2277
68224f8d 2278 AC_SUBST(C_INCLUDE_DIR)
11764568 2279 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2280 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
bec9a462 2281 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
11764568 2282 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
68224f8d 2283])
2284
2285
20752884 2286dnl
68224f8d 2287dnl Check for which locale library to use. The choice is mapped to
2288dnl a subdirectory of config/locale.
77cbec55 2289dnl
68224f8d 2290dnl Default is generic.
20752884 2291dnl
2ad02b6c 2292AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
dae1a11c 2293 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
68224f8d 2294 [use MODEL for target locale package],
77cefa59 2295 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
4a17ac7b 2296
2297 # Deal with gettext issues. Default to not using it (=no) until we detect
2298 # support for it later. Let the user turn it off via --e/d, but let that
2299 # default to on for easier handling.
2300 USE_NLS=no
2301 AC_ARG_ENABLE(nls,
2302 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2303 [],
2304 [enable_nls=yes])
dca89719 2305
77cefa59 2306 # Either a known package, or "auto"
68224f8d 2307 if test $enable_clocale = no || test $enable_clocale = yes; then
2308 enable_clocale=auto
2309 fi
20752884 2310 enable_clocale_flag=$enable_clocale
2311
4a17ac7b 2312 # Probe for locale model to use if none specified.
68224f8d 2313 # Default to "generic".
2314 if test $enable_clocale_flag = auto; then
1abe8d9c 2315 case ${target_os} in
2316 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
dca89719 2317 enable_clocale_flag=gnu
2318 ;;
7b9f7d16 2319 darwin*)
dca89719 2320 enable_clocale_flag=darwin
9132fd65 2321 ;;
7b9f7d16 2322 dragonfly* | freebsd*)
463553db 2323 enable_clocale_flag=dragonfly
2324 ;;
ce1a5edb 2325 openbsd*)
2326 enable_clocale_flag=newlib
2327 ;;
01702872 2328 *)
77cefa59 2329 if test x"$with_newlib" = x"yes"; then
2330 enable_clocale_flag=newlib
2331 else
2332 enable_clocale_flag=generic
2333 fi
dca89719 2334 ;;
01702872 2335 esac
2336 fi
2337
4a17ac7b 2338 # Sanity check model, and test for special functionality.
2339 if test $enable_clocale_flag = gnu; then
2340 AC_EGREP_CPP([_GLIBCXX_ok], [
2341 #include <features.h>
9aa6a0dd 2342 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
4a17ac7b 2343 _GLIBCXX_ok
2344 #endif
2345 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2346
4a17ac7b 2347 # Set it to scream when it hurts.
dca89719 2348 ac_save_CFLAGS="$CFLAGS"
4a17ac7b 2349 CFLAGS="-Wimplicit-function-declaration -Werror"
2350
2351 # Use strxfrm_l if available.
2352 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2353 #include <string.h>
2354 #include <locale.h>],
dca89719 2355 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2356 AC_DEFINE(HAVE_STRXFRM_L, 1,
2357 [Define if strxfrm_l is available in <string.h>.]),)
2358
4a17ac7b 2359 # Use strerror_l if available.
2360 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2361 #include <string.h>
2362 #include <locale.h>],
dca89719 2363 [__locale_t loc; strerror_l(5, loc);],
2364 AC_DEFINE(HAVE_STRERROR_L, 1,
2365 [Define if strerror_l is available in <string.h>.]),)
4a17ac7b 2366
2367 CFLAGS="$ac_save_CFLAGS"
2368 fi
2369
2370 # Perhaps use strerror_r if available, and strerror_l isn't.
dca89719 2371 ac_save_CFLAGS="$CFLAGS"
4a17ac7b 2372 CFLAGS="-Wimplicit-function-declaration -Werror"
2373 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2374 #include <string.h>
2375 #include <locale.h>],
dca89719 2376 [char s[128]; strerror_r(5, s, 128);],
2377 AC_DEFINE(HAVE_STRERROR_R, 1,
2378 [Define if strerror_r is available in <string.h>.]),)
4a17ac7b 2379 CFLAGS="$ac_save_CFLAGS"
a1555270 2380
68224f8d 2381 # Set configure bits for specified locale package
4a17ac7b 2382 AC_MSG_CHECKING([for C locale to use])
68224f8d 2383 case ${enable_clocale_flag} in
2384 generic)
c099f5df 2385 AC_MSG_RESULT(generic)
2386
cd534976 2387 CLOCALE_H=config/locale/generic/c_locale.h
2388 CLOCALE_CC=config/locale/generic/c_locale.cc
a314f26a 2389 CCODECVT_CC=config/locale/generic/codecvt_members.cc
cd534976 2390 CCOLLATE_CC=config/locale/generic/collate_members.cc
2391 CCTYPE_CC=config/locale/generic/ctype_members.cc
2392 CMESSAGES_H=config/locale/generic/messages_members.h
2393 CMESSAGES_CC=config/locale/generic/messages_members.cc
2394 CMONEY_CC=config/locale/generic/monetary_members.cc
2395 CNUMERIC_CC=config/locale/generic/numeric_members.cc
5cd3cc5f 2396 CTIME_H=config/locale/generic/time_members.h
cd534976 2397 CTIME_CC=config/locale/generic/time_members.cc
8404b390 2398 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
c099f5df 2399 ;;
9132fd65 2400 darwin)
7b9f7d16 2401 AC_MSG_RESULT(darwin)
9132fd65 2402
2403 CLOCALE_H=config/locale/generic/c_locale.h
2404 CLOCALE_CC=config/locale/generic/c_locale.cc
9132fd65 2405 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2406 CCOLLATE_CC=config/locale/generic/collate_members.cc
2407 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2408 CMESSAGES_H=config/locale/generic/messages_members.h
2409 CMESSAGES_CC=config/locale/generic/messages_members.cc
2410 CMONEY_CC=config/locale/generic/monetary_members.cc
2411 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2412 CTIME_H=config/locale/generic/time_members.h
2413 CTIME_CC=config/locale/generic/time_members.cc
2414 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2415 ;;
dca89719 2416
463553db 2417 dragonfly)
7b9f7d16 2418 AC_MSG_RESULT(dragonfly or freebsd)
463553db 2419
418255b1 2420 CLOCALE_H=config/locale/dragonfly/c_locale.h
463553db 2421 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
418255b1 2422 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2423 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
463553db 2424 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2425 CMESSAGES_H=config/locale/generic/messages_members.h
2426 CMESSAGES_CC=config/locale/generic/messages_members.cc
418255b1 2427 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2428 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2429 CTIME_H=config/locale/dragonfly/time_members.h
2430 CTIME_CC=config/locale/dragonfly/time_members.cc
463553db 2431 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2432 ;;
2433
68224f8d 2434 gnu)
20752884 2435 AC_MSG_RESULT(gnu)
c099f5df 2436
2437 # Declare intention to use gettext, and add support for specific
2438 # languages.
237ebf59 2439 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
c099f5df 2440 ALL_LINGUAS="de fr"
a1555270 2441
237ebf59 2442 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
a1555270 2443 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2444 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
dca89719 2445 USE_NLS=yes
a1555270 2446 fi
c099f5df 2447 # Export the build objects.
2448 for ling in $ALL_LINGUAS; do \
dca89719 2449 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2450 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
c099f5df 2451 done
5a64d8cf 2452 AC_SUBST(glibcxx_MOFILES)
2453 AC_SUBST(glibcxx_POFILES)
c099f5df 2454
cd534976 2455 CLOCALE_H=config/locale/gnu/c_locale.h
2456 CLOCALE_CC=config/locale/gnu/c_locale.cc
a314f26a 2457 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
cd534976 2458 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2459 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2460 CMESSAGES_H=config/locale/gnu/messages_members.h
2461 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2462 CMONEY_CC=config/locale/gnu/monetary_members.cc
2463 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
5cd3cc5f 2464 CTIME_H=config/locale/gnu/time_members.h
cd534976 2465 CTIME_CC=config/locale/gnu/time_members.cc
8404b390 2466 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
20752884 2467 ;;
68224f8d 2468 ieee_1003.1-2001)
265ccc33 2469 AC_MSG_RESULT(IEEE 1003.1)
c099f5df 2470
cd534976 2471 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2472 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
a314f26a 2473 CCODECVT_CC=config/locale/generic/codecvt_members.cc
cd534976 2474 CCOLLATE_CC=config/locale/generic/collate_members.cc
2475 CCTYPE_CC=config/locale/generic/ctype_members.cc
2476 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2477 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2478 CMONEY_CC=config/locale/generic/monetary_members.cc
2479 CNUMERIC_CC=config/locale/generic/numeric_members.cc
5cd3cc5f 2480 CTIME_H=config/locale/generic/time_members.h
cd534976 2481 CTIME_CC=config/locale/generic/time_members.cc
8404b390 2482 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
20752884 2483 ;;
77cefa59 2484 newlib)
2485 AC_MSG_RESULT(newlib)
2486
2487 CLOCALE_H=config/locale/generic/c_locale.h
2488 CLOCALE_CC=config/locale/generic/c_locale.cc
2489 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2490 CCOLLATE_CC=config/locale/generic/collate_members.cc
2491 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2492 CMESSAGES_H=config/locale/generic/messages_members.h
2493 CMESSAGES_CC=config/locale/generic/messages_members.cc
2494 CMONEY_CC=config/locale/generic/monetary_members.cc
2495 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2496 CTIME_H=config/locale/generic/time_members.h
2497 CTIME_CC=config/locale/generic/time_members.cc
2498 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2499 ;;
20752884 2500 esac
2501
c099f5df 2502 # This is where the testsuite looks for locale catalogs, using the
2503 # -DLOCALEDIR define during testsuite compilation.
5a64d8cf 2504 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2505 AC_SUBST(glibcxx_localedir)
c099f5df 2506
265ccc33 2507 # A standalone libintl (e.g., GNU libintl) may be in use.
2508 if test $USE_NLS = yes; then
307f7a6d 2509 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2510 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2511 fi
2512 if test $USE_NLS = yes; then
dca89719 2513 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2514 [Define if NLS translations are to be used.])
265ccc33 2515 fi
2516
241a90f2 2517 AC_SUBST(USE_NLS)
db42028b 2518 AC_SUBST(CLOCALE_H)
c099f5df 2519 AC_SUBST(CMESSAGES_H)
7f713ccf 2520 AC_SUBST(CCODECVT_CC)
2521 AC_SUBST(CCOLLATE_CC)
2522 AC_SUBST(CCTYPE_CC)
2523 AC_SUBST(CMESSAGES_CC)
2524 AC_SUBST(CMONEY_CC)
2525 AC_SUBST(CNUMERIC_CC)
5cd3cc5f 2526 AC_SUBST(CTIME_H)
7f713ccf 2527 AC_SUBST(CTIME_CC)
2528 AC_SUBST(CLOCALE_CC)
2529 AC_SUBST(CLOCALE_INTERNAL_H)
20752884 2530])
2531
2532
0b0e5029 2533dnl
2534dnl Check for which std::allocator base class to use. The choice is
2535dnl mapped from a subdirectory of include/ext.
2536dnl
2537dnl Default is new.
2538dnl
2539AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
c586733c 2540 AC_MSG_CHECKING([for std::allocator base class])
dae1a11c 2541 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
0b0e5029 2542 [use KIND for target std::allocator base],
3f601d11 2543 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1abe8d9c 2544
0b0e5029 2545 # If they didn't use this option switch, or if they specified --enable
2546 # with no specific model, we'll have to look for one. If they
2547 # specified --disable (???), do likewise.
1abe8d9c 2548 if test $enable_libstdcxx_allocator = no ||
2549 test $enable_libstdcxx_allocator = yes;
2550 then
0b0e5029 2551 enable_libstdcxx_allocator=auto
2552 fi
2553
292718d4 2554 # Either a known package, or "auto". Auto implies the default choice
2555 # for a particular platform.
0b0e5029 2556 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2557
2558 # Probe for host-specific support if no specific model is specified.
2559 # Default to "new".
2560 if test $enable_libstdcxx_allocator_flag = auto; then
2561 case ${target_os} in
292718d4 2562 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
dca89719 2563 enable_libstdcxx_allocator_flag=new
2564 ;;
0b0e5029 2565 *)
dca89719 2566 enable_libstdcxx_allocator_flag=new
2567 ;;
0b0e5029 2568 esac
2569 fi
2570 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
dca89719 2571
0b0e5029 2572
2573 # Set configure bits for specified locale package
2574 case ${enable_libstdcxx_allocator_flag} in
2575 bitmap)
2576 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2577 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2578 ;;
2579 malloc)
2580 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2581 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2582 ;;
2583 mt)
2584 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2585 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2586 ;;
2587 new)
2588 ALLOCATOR_H=config/allocator/new_allocator_base.h
2589 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2590 ;;
3f601d11 2591 pool)
2592 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2593 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
dca89719 2594 ;;
0b0e5029 2595 esac
2596
13143e13 2597 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW,
2598 test $enable_libstdcxx_allocator_flag = new)
0b0e5029 2599 AC_SUBST(ALLOCATOR_H)
2600 AC_SUBST(ALLOCATOR_NAME)
2601])
2602
2603
b9e8095b 2604dnl
68224f8d 2605dnl Check for whether the Boost-derived checks should be turned on.
2606dnl
2607dnl --enable-concept-checks turns them on.
2608dnl --disable-concept-checks leaves them off.
2609dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2610dnl Where DEFAULT is either `yes' or `no'.
2611dnl
2ad02b6c 2612AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
68224f8d 2613 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2614 if test $enable_concept_checks = yes; then
d64903a9 2615 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
dca89719 2616 [Define to use concept checking code from the boost libraries.])
68224f8d 2617 fi
2618])
2619
cb38c7e0 2620dnl
2621dnl Use extern templates.
2622dnl
2623dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2624dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2625
2626dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2627dnl Where DEFAULT is `yes' or `no'.
2628dnl
2629AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2630
2631 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2632
2633 AC_MSG_CHECKING([for extern template support])
2634 AC_MSG_RESULT([$enable_extern_template])
2635
2636 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2637])
2638
b710ec85 2639dnl
2640dnl Use vtable verification.
2641dnl
2642dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2643dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2644
2645dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2646dnl Where DEFAULT is `yes' or `no'.
2647dnl
2648AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2649
2650 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2651
2652 AC_MSG_CHECKING([for vtable verify support])
2653 AC_MSG_RESULT([$enable_vtable_verify])
2654
5bb1df18 2655 vtv_cygmin=no
b710ec85 2656 if test $enable_vtable_verify = yes; then
5be42fa9 2657 case ${target_os} in
2658 cygwin*|mingw32*)
2659 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
a95f42c2 2660 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
5bb1df18 2661 vtv_cygmin=yes
5be42fa9 2662 ;;
a95f42c2 2663 darwin*)
2664 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2665 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2666 ;;
08de21a4 2667 solaris2*)
2668 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2669 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2670 ;;
5be42fa9 2671 *)
2672 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
a95f42c2 2673 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
5be42fa9 2674 ;;
2675 esac
b710ec85 2676 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
b710ec85 2677 else
2678 VTV_CXXFLAGS=
2679 VTV_PCH_CXXFLAGS=
2680 VTV_CXXLINKFLAGS=
2681 fi
2682
2683 AC_SUBST(VTV_CXXFLAGS)
2684 AC_SUBST(VTV_PCH_CXXFLAGS)
2685 AC_SUBST(VTV_CXXLINKFLAGS)
5bb1df18 2686 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
b710ec85 2687 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2688])
2689
6482a45c 2690dnl
2691dnl Check for parallel mode pre-requisites, including OpenMP support.
2692dnl
2693dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2694dnl
2695AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2696
2697 enable_parallel=no;
6bb3458a 2698
e2db2723 2699 # See if configured libgomp/omp.h exists. (libgomp may be in
2700 # noconfigdirs but not explicitly disabled.)
1fda3360 2701 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
e2db2723 2702 enable_parallel=yes;
2703 else
1fda3360 2704 AC_MSG_NOTICE([target-libgomp not built])
6482a45c 2705 fi
2706
2707 AC_MSG_CHECKING([for parallel mode support])
2708 AC_MSG_RESULT([$enable_parallel])
6482a45c 2709])
2710
68224f8d 2711
b9e8095b 2712dnl
68224f8d 2713dnl Check for which I/O library to use: stdio, or something specific.
77cbec55 2714dnl
68224f8d 2715dnl Default is stdio.
b9e8095b 2716dnl
2ad02b6c 2717AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
68224f8d 2718 AC_MSG_CHECKING([for underlying I/O to use])
dae1a11c 2719 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
68224f8d 2720 [use target-specific I/O package], [permit stdio])
2721
2722 # Now that libio has been removed, you can have any color you want as long
2723 # as it's black. This is one big no-op until other packages are added, but
2724 # showing the framework never hurts.
2725 case ${enable_cstdio} in
2726 stdio)
c099f5df 2727 CSTDIO_H=config/io/c_io_stdio.h
2728 BASIC_FILE_H=config/io/basic_file_stdio.h
2729 BASIC_FILE_CC=config/io/basic_file_stdio.cc
e7ccf4bf 2730 AC_MSG_RESULT(stdio)
27f70a82 2731 ;;
b9e8095b 2732 esac
0d554d4f 2733
db42028b 2734 AC_SUBST(CSTDIO_H)
2735 AC_SUBST(BASIC_FILE_H)
7f713ccf 2736 AC_SUBST(BASIC_FILE_CC)
b9e8095b 2737])
2738
2739
3d8dde60 2740dnl
68224f8d 2741dnl Check for "unusual" flags to pass to the compiler while building.
3d8dde60 2742dnl
68224f8d 2743dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2744dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2745dnl --disable-cxx-flags passes nothing.
2746dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2747dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2748dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2749dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2750dnl If "default flags" is an empty string, the effect is the same
2751dnl as --disable or --enable=no.
75f8cc74 2752dnl
2ad02b6c 2753AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
68224f8d 2754 AC_MSG_CHECKING([for extra compiler flags for building])
2755 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2756 [pass compiler FLAGS when building library],
2757 [case "x$enable_cxx_flags" in
2758 xno | x) enable_cxx_flags= ;;
2759 x-*) ;;
2760 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2761 esac])
2762
2763 # Run through flags (either default or command-line) and set anything
2764 # extra (e.g., #defines) that must accompany particular g++ options.
2765 if test -n "$enable_cxx_flags"; then
2766 for f in $enable_cxx_flags; do
2767 case "$f" in
dca89719 2768 -fhonor-std) ;;
2769 -*) ;;
2770 *) # and we're trying to pass /what/ exactly?
2771 AC_MSG_ERROR([compiler flags start with a -]) ;;
68224f8d 2772 esac
2773 done
75f8cc74 2774 fi
2775
68224f8d 2776 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2777 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2778 AC_SUBST(EXTRA_CXX_FLAGS)
3d8dde60 2779])
2780
68224f8d 2781
68224f8d 2782dnl
2783dnl Check to see if debugging libraries are to be built.
2784dnl
2785dnl --enable-libstdcxx-debug
2786dnl builds a separate set of debugging libraries in addition to the
2787dnl normal (shared, static) libstdc++ binaries.
2788dnl
2789dnl --disable-libstdcxx-debug
2790dnl builds only one (non-debug) version of libstdc++.
2791dnl
2792dnl --enable-libstdcxx-debug-flags=FLAGS
2793dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2794dnl
2795dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2796dnl Where DEFAULT is either `yes' or `no'.
2797dnl
2ad02b6c 2798AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
68224f8d 2799 AC_MSG_CHECKING([for additional debug build])
2800 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2801 AC_MSG_RESULT($enable_libstdcxx_debug)
11764568 2802 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
b9e8095b 2803])
2804
2805
df4b504c 2806dnl
68224f8d 2807dnl Check for explicit debug flags.
df4b504c 2808dnl
68224f8d 2809dnl --enable-libstdcxx-debug-flags='-O1'
2810dnl is a general method for passing flags to be used when
5506efaf 2811dnl building debug libraries with --enable-libstdcxx-debug.
df4b504c 2812dnl
68224f8d 2813dnl --disable-libstdcxx-debug-flags does nothing.
2814dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2815dnl If "default flags" is an empty string, the effect is the same
2816dnl as --disable or --enable=no.
2817dnl
2ad02b6c 2818AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
68224f8d 2819 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2820 [pass compiler FLAGS when building debug library],
2821 [case "x$enable_libstdcxx_debug_flags" in
2822 xno | x) enable_libstdcxx_debug_flags= ;;
2823 x-*) ;;
2824 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2825 esac])
2826
2827 # Option parsed, now set things appropriately
2828 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2829 AC_SUBST(DEBUG_FLAGS)
2830
2831 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
df4b504c 2832])
2833
2834
11764568 2835dnl
2836dnl Check if the user only wants a freestanding library implementation.
2837dnl
2838dnl --disable-hosted-libstdcxx will turn off most of the library build,
2839dnl installing only the headers required by [17.4.1.3] and the language
2840dnl support library. More than that will be built (to keep the Makefiles
2841dnl conveniently clean), but not installed.
2842dnl
2843dnl Sets:
2844dnl is_hosted (yes/no)
2845dnl
c3bc94d9 2846dnl Defines:
2847dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2848dnl
2ad02b6c 2849AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
11764568 2850 AC_ARG_ENABLE([hosted-libstdcxx],
2851 AC_HELP_STRING([--disable-hosted-libstdcxx],
dca89719 2852 [only build freestanding C++ runtime support]),,
ece3a793 2853 [case "$host" in
dca89719 2854 arm*-*-symbianelf*)
ece3a793 2855 enable_hosted_libstdcxx=no
2856 ;;
dca89719 2857 *)
ece3a793 2858 enable_hosted_libstdcxx=yes
2859 ;;
2860 esac])
11764568 2861 if test "$enable_hosted_libstdcxx" = no; then
2862 AC_MSG_NOTICE([Only freestanding libraries will be built])
2863 is_hosted=no
c3bc94d9 2864 hosted_define=0
11764568 2865 enable_abi_check=no
2866 enable_libstdcxx_pch=no
2867 else
2868 is_hosted=yes
c3bc94d9 2869 hosted_define=1
11764568 2870 fi
2871 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
c3bc94d9 2872 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2873 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
11764568 2874])
2875
2876
d866c65d 2877dnl
2878dnl Check if the user wants a non-verbose library implementation.
2879dnl
2880dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2881dnl standard error on termination.
2882dnl
2883dnl Defines:
2884dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2885dnl
2886AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2887 AC_ARG_ENABLE([libstdcxx-verbose],
2888 AC_HELP_STRING([--disable-libstdcxx-verbose],
2889 [disable termination messages to standard error]),,
2890 [enable_libstdcxx_verbose=yes])
2891 if test x"$enable_libstdcxx_verbose" = xyes; then
2892 verbose_define=1
2893 else
2894 AC_MSG_NOTICE([verbose termination messages are disabled])
2895 verbose_define=0
2896 fi
2897 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
2898 [Define to 1 if a verbose library is built, or 0 otherwise.])
2899])
2900
2901
6b6f8d4d 2902dnl
c586733c 2903dnl Check for template specializations for the 'long long' type.
7bdf0491 2904dnl The result determines only whether 'long long' I/O is enabled; things
2905dnl like numeric_limits<> specializations are always available.
6b6f8d4d 2906dnl
5a64d8cf 2907dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2908dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2909dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
68224f8d 2910dnl Where DEFAULT is either `yes' or `no'.
6b6f8d4d 2911dnl
2ad02b6c 2912AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
c586733c 2913 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
68224f8d 2914 if test $enable_long_long = yes; then
dca89719 2915 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
2916 [Define if code specialized for long long should be used.])
6b6f8d4d 2917 fi
c586733c 2918 AC_MSG_CHECKING([for enabled long long specializations])
2919 AC_MSG_RESULT([$enable_long_long])
2920])
2921
2922
a9c001cb 2923dnl
2924dnl Check for decimal floating point.
2925dnl See:
2926dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
2927dnl
2928dnl This checks to see if the host supports decimal floating point types.
2929dnl
2930dnl Defines:
2931dnl _GLIBCXX_USE_DECIMAL_FLOAT
2932dnl
2933AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
2934
2935 # Fake what AC_TRY_COMPILE does, without linking as this is
2936 # unnecessary for this test.
2937
2938 cat > conftest.$ac_ext << EOF
2939[#]line __oline__ "configure"
2940int main()
2941{
2942 _Decimal32 d1;
2943 _Decimal64 d2;
2944 _Decimal128 d3;
2945 return 0;
2946}
2947EOF
2948
2949 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
2950 if AC_TRY_EVAL(ac_compile); then
2951 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
2952 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
2953 enable_dfp=yes
2954 else
2955 enable_dfp=no
2956 fi
2957 AC_MSG_RESULT($enable_dfp)
2958 rm -f conftest*
2959])
2960
a3ee70c2 2961dnl
2962dnl Check for GNU 128-bit integer and floating point types.
2963dnl
2964dnl Note: also checks that the types aren't standard types.
2965dnl
2966dnl Defines:
2967dnl _GLIBCXX_USE_INT128
2968dnl _GLIBCXX_USE_FLOAT128
2969dnl
2970AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
2971
2972 AC_LANG_SAVE
2973 AC_LANG_CPLUSPLUS
2974
2975 # Fake what AC_TRY_COMPILE does, without linking as this is
2976 # unnecessary for this test.
2977
2978 cat > conftest.$ac_ext << EOF
2979[#]line __oline__ "configure"
2980template<typename T1, typename T2>
2981 struct same
2982 { typedef T2 type; };
2983
2984template<typename T>
2985 struct same<T, T>;
2986
2987int main()
2988{
52628f41 2989 typename same<long, __int128>::type i1;
2990 typename same<long long, __int128>::type i2;
a3ee70c2 2991}
2992EOF
2993
52628f41 2994 AC_MSG_CHECKING([for __int128])
a3ee70c2 2995 if AC_TRY_EVAL(ac_compile); then
2996 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
52628f41 2997 [Define if __int128 is supported on this host.])
a3ee70c2 2998 enable_int128=yes
2999 else
3000 enable_int128=no
3001 fi
3002 AC_MSG_RESULT($enable_int128)
3003 rm -f conftest*
3004
3005 cat > conftest.$ac_ext << EOF
3006[#]line __oline__ "configure"
3007template<typename T1, typename T2>
3008 struct same
3009 { typedef T2 type; };
3010
3011template<typename T>
3012 struct same<T, T>;
3013
3014int main()
3015{
0559575c 3016 typename same<double, __float128>::type f1;
a3ee70c2 3017 typename same<long double, __float128>::type f2;
3018}
3019EOF
3020
3021 AC_MSG_CHECKING([for __float128])
3022 if AC_TRY_EVAL(ac_compile); then
3023 AC_DEFINE(_GLIBCXX_USE_FLOAT128, 1,
3024 [Define if __float128 is supported on this host.])
3025 enable_float128=yes
3026 else
3027 enable_float128=no
3028 fi
3029 AC_MSG_RESULT($enable_float128)
3030 rm -f conftest*
3031
3032 AC_LANG_RESTORE
3033])
3034
c586733c 3035dnl
3036dnl Check for template specializations for the 'wchar_t' type.
3037dnl
3038dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3039dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3040dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3041dnl Where DEFAULT is either `yes' or `no'.
3042dnl
21b22bc5 3043dnl Necessary support must also be present.
c586733c 3044dnl
3045AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3046 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
21b22bc5 3047
3048 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3049 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3050 AC_MSG_CHECKING([for mbstate_t])
3051 AC_TRY_COMPILE([#include <wchar.h>],
3052 [mbstate_t teststate;],
3053 have_mbstate_t=yes, have_mbstate_t=no)
3054 AC_MSG_RESULT($have_mbstate_t)
3055 if test x"$have_mbstate_t" = xyes; then
3056 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3057 fi
3058
0d162e5b 3059 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3060 # ac_has_wchar_h.
3061 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
dca89719 3062
21b22bc5 3063 if test x"$enable_wchar_t" = x"yes"; then
3064
3065 AC_LANG_SAVE
3066 AC_LANG_CPLUSPLUS
dca89719 3067
21b22bc5 3068 if test x"$ac_has_wchar_h" = xyes &&
3069 test x"$ac_has_wctype_h" = xyes; then
3070 AC_TRY_COMPILE([#include <wchar.h>
dca89719 3071 #include <stddef.h>
3072 wint_t i;
21b22bc5 3073 long l = WEOF;
3074 long j = WCHAR_MIN;
3075 long k = WCHAR_MAX;
dca89719 3076 namespace test
3077 {
21b22bc5 3078 using ::btowc;
3079 using ::fgetwc;
3080 using ::fgetws;
3081 using ::fputwc;
3082 using ::fputws;
3083 using ::fwide;
dca89719 3084 using ::fwprintf;
21b22bc5 3085 using ::fwscanf;
3086 using ::getwc;
3087 using ::getwchar;
dca89719 3088 using ::mbrlen;
3089 using ::mbrtowc;
3090 using ::mbsinit;
3091 using ::mbsrtowcs;
21b22bc5 3092 using ::putwc;
3093 using ::putwchar;
dca89719 3094 using ::swprintf;
3095 using ::swscanf;
21b22bc5 3096 using ::ungetwc;
dca89719 3097 using ::vfwprintf;
3098 using ::vswprintf;
3099 using ::vwprintf;
3100 using ::wcrtomb;
3101 using ::wcscat;
3102 using ::wcschr;
3103 using ::wcscmp;
3104 using ::wcscoll;
3105 using ::wcscpy;
3106 using ::wcscspn;
3107 using ::wcsftime;
21b22bc5 3108 using ::wcslen;
dca89719 3109 using ::wcsncat;
3110 using ::wcsncmp;
3111 using ::wcsncpy;
21b22bc5 3112 using ::wcspbrk;
dca89719 3113 using ::wcsrchr;
3114 using ::wcsrtombs;
3115 using ::wcsspn;
21b22bc5 3116 using ::wcsstr;
dca89719 3117 using ::wcstod;
3118 using ::wcstok;
21b22bc5 3119 using ::wcstol;
dca89719 3120 using ::wcstoul;
3121 using ::wcsxfrm;
3122 using ::wctob;
21b22bc5 3123 using ::wmemchr;
3124 using ::wmemcmp;
3125 using ::wmemcpy;
3126 using ::wmemmove;
3127 using ::wmemset;
dca89719 3128 using ::wprintf;
3129 using ::wscanf;
21b22bc5 3130 }
3131 ],[],[], [enable_wchar_t=no])
3132 else
3133 enable_wchar_t=no
3134 fi
3135
3136 AC_LANG_RESTORE
3137 fi
3138
3139 if test x"$enable_wchar_t" = x"yes"; then
d64903a9 3140 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
dca89719 3141 [Define if code specialized for wchar_t should be used.])
c586733c 3142 fi
21b22bc5 3143
c586733c 3144 AC_MSG_CHECKING([for enabled wchar_t specializations])
3145 AC_MSG_RESULT([$enable_wchar_t])
6b6f8d4d 3146])
3147
3148
0e97825d 3149dnl
68224f8d 3150dnl Check to see if building and using a C++ precompiled header can be done.
6ff3baa3 3151dnl
68224f8d 3152dnl --enable-libstdcxx-pch=yes
3153dnl default, this shows intent to use stdc++.h.gch If it looks like it
3154dnl may work, after some light-hearted attempts to puzzle out compiler
3155dnl support, flip bits on in include/Makefile.am
e3bb8f1a 3156dnl
68224f8d 3157dnl --disable-libstdcxx-pch
3158dnl turns off attempts to use or build stdc++.h.gch.
0194306c 3159dnl
68224f8d 3160dnl Substs:
3161dnl glibcxx_PCHFLAGS
0194306c 3162dnl
2ad02b6c 3163AC_DEFUN([GLIBCXX_ENABLE_PCH], [
68224f8d 3164 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
68224f8d 3165 if test $enable_libstdcxx_pch = yes; then
3166 AC_CACHE_CHECK([for compiler with PCH support],
3167 [glibcxx_cv_prog_CXX_pch],
3168 [ac_save_CXXFLAGS="$CXXFLAGS"
3169 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3170 AC_LANG_SAVE
3171 AC_LANG_CPLUSPLUS
3172 echo '#include <math.h>' > conftest.h
3173 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
dca89719 3174 -o conftest.h.gch 1>&5 2>&1 &&
3175 echo '#error "pch failed"' > conftest.h &&
3176 echo '#include "conftest.h"' > conftest.cc &&
68224f8d 3177 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3178 then
dca89719 3179 glibcxx_cv_prog_CXX_pch=yes
68224f8d 3180 else
dca89719 3181 glibcxx_cv_prog_CXX_pch=no
68224f8d 3182 fi
3183 rm -f conftest*
3184 CXXFLAGS=$ac_save_CXXFLAGS
3185 AC_LANG_RESTORE
3186 ])
3187 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
a167a2a4 3188 fi
0617d50e 3189
edf9c5a2 3190 AC_MSG_CHECKING([for enabled PCH])
3191 AC_MSG_RESULT([$enable_libstdcxx_pch])
3192
11764568 3193 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
68224f8d 3194 if test $enable_libstdcxx_pch = yes; then
6482a45c 3195 glibcxx_PCHFLAGS="-include bits/stdc++.h"
a167a2a4 3196 else
68224f8d 3197 glibcxx_PCHFLAGS=""
3a278579 3198 fi
68224f8d 3199 AC_SUBST(glibcxx_PCHFLAGS)
3a278579 3200])
3201
08078d47 3202
3ba82d60 3203dnl
3204dnl Check for atomic builtins.
3205dnl See:
f06b9073 3206dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
3ba82d60 3207dnl
3208dnl This checks to see if the host supports the compiler-generated
dca89719 3209dnl builtins for atomic operations for various integral sizes. Note, this
367b2e9f 3210dnl is intended to be an all-or-nothing switch, so all the atomic operations
3211dnl that are used should be checked.
3ba82d60 3212dnl
3213dnl Note:
cbdc6ff0 3214dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
3ba82d60 3215dnl
3ba82d60 3216AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
3ba82d60 3217 AC_LANG_SAVE
3218 AC_LANG_CPLUSPLUS
367b2e9f 3219 old_CXXFLAGS="$CXXFLAGS"
cbdc6ff0 3220
3221 # Do link tests if possible, instead asm tests, limited to some platforms
3222 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3223 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3224 atomic_builtins_link_tests=no
3225 if test x$gcc_no_link != xyes; then
3226 # Can do link tests. Limit to some tested platforms
3227 case "$host" in
3228 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3229 atomic_builtins_link_tests=yes
dca89719 3230 ;;
cbdc6ff0 3231 esac
3232 fi
3233
3234 if test x$atomic_builtins_link_tests = xyes; then
3235
3236 # Do link tests.
3237
3238 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3239
3240 AC_MSG_CHECKING([for atomic builtins for bool])
3241 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
3242 AC_TRY_LINK(
3243 [ ],
3244 [typedef bool atomic_type;
3245 atomic_type c1;
3246 atomic_type c2;
f06b9073 3247 atomic_type c3(0);
3248 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3249 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3250 __ATOMIC_RELAXED);
f06b9073 3251 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3252 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3253 ],
cbdc6ff0 3254 [glibcxx_cv_atomic_bool=yes],
3255 [glibcxx_cv_atomic_bool=no])
dca89719 3256 ])
cbdc6ff0 3257 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3258
3259 AC_MSG_CHECKING([for atomic builtins for short])
3260 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
3261 AC_TRY_LINK(
3262 [ ],
3263 [typedef short atomic_type;
3264 atomic_type c1;
3265 atomic_type c2;
f06b9073 3266 atomic_type c3(0);
3267 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3268 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3269 __ATOMIC_RELAXED);
f06b9073 3270 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3271 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3272 ],
cbdc6ff0 3273 [glibcxx_cv_atomic_short=yes],
3274 [glibcxx_cv_atomic_short=no])
dca89719 3275 ])
cbdc6ff0 3276 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3277
3278 AC_MSG_CHECKING([for atomic builtins for int])
3279 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
3280 AC_TRY_LINK(
3281 [ ],
3282 [typedef int atomic_type;
3283 atomic_type c1;
3284 atomic_type c2;
f06b9073 3285 atomic_type c3(0);
3286 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3287 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3288 __ATOMIC_RELAXED);
f06b9073 3289 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3290 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3291 ],
cbdc6ff0 3292 [glibcxx_cv_atomic_int=yes],
3293 [glibcxx_cv_atomic_int=no])
dca89719 3294 ])
cbdc6ff0 3295 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3296
3297 AC_MSG_CHECKING([for atomic builtins for long long])
3298 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
3299 AC_TRY_LINK(
3300 [ ],
3301 [typedef long long atomic_type;
3302 atomic_type c1;
3303 atomic_type c2;
f06b9073 3304 atomic_type c3(0);
3305 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3306 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3307 __ATOMIC_RELAXED);
f06b9073 3308 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3309 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3310 ],
cbdc6ff0 3311 [glibcxx_cv_atomic_long_long=yes],
3312 [glibcxx_cv_atomic_long_long=no])
dca89719 3313 ])
cbdc6ff0 3314 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3315
3316 else
3317
3318 # Do asm tests.
3319
367b2e9f 3320 # Compile unoptimized.
3321 CXXFLAGS='-O0 -S'
3322
cbdc6ff0 3323 # Fake what AC_TRY_COMPILE does.
3ba82d60 3324
3ba82d60 3325 cat > conftest.$ac_ext << EOF
3326[#]line __oline__ "configure"
3327int main()
e6dbf630 3328{
3329 typedef bool atomic_type;
3330 atomic_type c1;
3331 atomic_type c2;
f06b9073 3332 atomic_type c3(0);
3333 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3334 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3335 __ATOMIC_RELAXED);
f06b9073 3336 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3337 __atomic_load_n(&c1, __ATOMIC_RELAXED);
0559575c 3338
e6dbf630 3339 return 0;
3340}
3341EOF
3342
3343 AC_MSG_CHECKING([for atomic builtins for bool])
3344 if AC_TRY_EVAL(ac_compile); then
ae5449f8 3345 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
dca89719 3346 glibcxx_cv_atomic_bool=no
e6dbf630 3347 else
dca89719 3348 glibcxx_cv_atomic_bool=yes
e6dbf630 3349 fi
3350 fi
cbdc6ff0 3351 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
e6dbf630 3352 rm -f conftest*
3353
3354 cat > conftest.$ac_ext << EOF
3355[#]line __oline__ "configure"
3356int main()
3357{
3358 typedef short atomic_type;
3359 atomic_type c1;
3360 atomic_type c2;
f06b9073 3361 atomic_type c3(0);
3362 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3363 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3364 __ATOMIC_RELAXED);
f06b9073 3365 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3366 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3367
e6dbf630 3368 return 0;
3369}
3370EOF
3371
3372 AC_MSG_CHECKING([for atomic builtins for short])
3373 if AC_TRY_EVAL(ac_compile); then
ae5449f8 3374 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
dca89719 3375 glibcxx_cv_atomic_short=no
e6dbf630 3376 else
dca89719 3377 glibcxx_cv_atomic_short=yes
e6dbf630 3378 fi
3379 fi
cbdc6ff0 3380 AC_MSG_RESULT($glibcxx_cv_atomic_short)
e6dbf630 3381 rm -f conftest*
3382
3383 cat > conftest.$ac_ext << EOF
3384[#]line __oline__ "configure"
3385int main()
3ba82d60 3386{
dca89719 3387 // NB: _Atomic_word not necessarily int.
3ba82d60 3388 typedef int atomic_type;
3389 atomic_type c1;
3390 atomic_type c2;
f06b9073 3391 atomic_type c3(0);
3392 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3393 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3394 __ATOMIC_RELAXED);
f06b9073 3395 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3396 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3397
367b2e9f 3398 return 0;
3399}
3400EOF
3401
3402 AC_MSG_CHECKING([for atomic builtins for int])
3403 if AC_TRY_EVAL(ac_compile); then
ae5449f8 3404 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
dca89719 3405 glibcxx_cv_atomic_int=no
367b2e9f 3406 else
dca89719 3407 glibcxx_cv_atomic_int=yes
367b2e9f 3408 fi
3409 fi
cbdc6ff0 3410 AC_MSG_RESULT($glibcxx_cv_atomic_int)
367b2e9f 3411 rm -f conftest*
3412
3413 cat > conftest.$ac_ext << EOF
3414[#]line __oline__ "configure"
3415int main()
3416{
e6dbf630 3417 typedef long long atomic_type;
367b2e9f 3418 atomic_type c1;
3419 atomic_type c2;
f06b9073 3420 atomic_type c3(0);
3421 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3422 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3423 __ATOMIC_RELAXED);
f06b9073 3424 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3425 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3426
367b2e9f 3427 return 0;
3ba82d60 3428}
3429EOF
367b2e9f 3430
e6dbf630 3431 AC_MSG_CHECKING([for atomic builtins for long long])
3ba82d60 3432 if AC_TRY_EVAL(ac_compile); then
ae5449f8 3433 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
dca89719 3434 glibcxx_cv_atomic_long_long=no
3ba82d60 3435 else
dca89719 3436 glibcxx_cv_atomic_long_long=yes
3ba82d60 3437 fi
3438 fi
cbdc6ff0 3439 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3ba82d60 3440 rm -f conftest*
3441
cbdc6ff0 3442 fi
e6dbf630 3443
367b2e9f 3444 CXXFLAGS="$old_CXXFLAGS"
3445 AC_LANG_RESTORE
3446
e39d1633 3447 # Set atomicity_dir to builtins if all but the long long test above passes.
f06b9073 3448 if test $glibcxx_cv_atomic_bool = yes \
3449 && test $glibcxx_cv_atomic_short = yes \
e39d1633 3450 && test $glibcxx_cv_atomic_int = yes; then
06bc5cca 3451 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3452 [Define if the compiler supports C++11 atomics.])
367b2e9f 3453 atomicity_dir=cpu/generic/atomicity_builtins
3454 fi
3455
3456 # If still generic, set to mutex.
3ba82d60 3457 if test $atomicity_dir = "cpu/generic" ; then
367b2e9f 3458 atomicity_dir=cpu/generic/atomicity_mutex
6bb3458a 3459 AC_MSG_WARN([No native atomic operations are provided for this platform.])
f2c7d583 3460 if test "x$target_thread_file" = xsingle; then
dca89719 3461 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3462 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
6bb3458a 3463 else
dca89719 3464 AC_MSG_WARN([They will be faked using a mutex.])
3465 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
6bb3458a 3466 fi
3ba82d60 3467 fi
367b2e9f 3468
3ba82d60 3469])
3470
3471
4ffa185b 3472dnl
3473dnl Allow visibility attributes to be used on namespaces, objects, etc.
3474dnl
69e5eea5 3475dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3476dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3477dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
4ffa185b 3478dnl Where DEFAULT is 'yes'.
3479dnl
69e5eea5 3480AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3481GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
4ffa185b 3482
69e5eea5 3483if test x$enable_libstdcxx_visibility = xyes ; then
4ffa185b 3484 dnl all hail libgfortran
3485 dnl Check whether the target supports hidden visibility.
3486 AC_CACHE_CHECK([whether the target supports hidden visibility],
6992582a 3487 glibcxx_cv_have_attribute_visibility, [
4ffa185b 3488 save_CFLAGS="$CFLAGS"
3489 CFLAGS="$CFLAGS -Werror"
3490 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
6992582a 3491 [], glibcxx_cv_have_attribute_visibility=yes,
3492 glibcxx_cv_have_attribute_visibility=no)
4ffa185b 3493 CFLAGS="$save_CFLAGS"])
6992582a 3494 if test $glibcxx_cv_have_attribute_visibility = no; then
69e5eea5 3495 enable_libstdcxx_visibility=no
4ffa185b 3496 fi
3497fi
3498
69e5eea5 3499GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3500AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
4ffa185b 3501])
3502
3503
6acf9653 3504dnl
3505dnl Add version tags to symbols in shared library (or not), additionally
3506dnl marking other symbols as private/local (or not).
3507dnl
377fc3e8 3508dnl Sets libtool_VERSION, and determines shared library SONAME.
3509dnl
3510dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3511dnl
00c7100f 3512dnl --enable-symvers=style adds a version script to the linker call when
3513dnl creating the shared library. The choice of version script is
3514dnl controlled by 'style'.
6acf9653 3515dnl --disable-symvers does not.
377fc3e8 3516dnl
5a64d8cf 3517dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
68224f8d 3518dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3519dnl choose a default style based on linker characteristics. Passing
3520dnl 'no' disables versioning.
3521dnl
2ad02b6c 3522AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
68224f8d 3523
dae1a11c 3524GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
68224f8d 3525 [enables symbol versioning of the shared library],
55f10c87 3526 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
00c7100f 3527
5a64d8cf 3528# If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
77cbec55 3529# don't know enough about $LD to do tricks...
68224f8d 3530AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
55f10c87 3531# Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3532# with extern "C++" in version scripts.
3533AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3abf7e61 3534
3535# Turn a 'yes' into a suitable default.
3536if test x$enable_symvers = xyes ; then
b66527cc 3537 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3abf7e61 3538 enable_symvers=no
3abf7e61 3539 else
871b22db 3540 if test $with_gnu_ld = yes ; then
7d804f04 3541 case ${target_os} in
dca89719 3542 hpux*)
3543 enable_symvers=no ;;
3544 *)
3545 enable_symvers=gnu ;;
7d804f04 3546 esac
871b22db 3547 else
3548 case ${target_os} in
dca89719 3549 darwin*)
871b22db 3550 enable_symvers=darwin ;;
55f10c87 3551 # Sun symbol versioning exists since Solaris 2.5.
3552 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3553 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3554 # version scripts, so disable symbol versioning if none can be
3555 # found.
3556 if test -z "$ac_cv_path_CXXFILT"; then
3557 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3558 AC_MSG_WARN([=== no GNU c++filt could be found.])
3559 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3560 enable_symvers=no
3561 else
3562 enable_symvers=sun
3563 fi
3564 ;;
dca89719 3565 *)
3566 enable_symvers=no ;;
871b22db 3567 esac
3568 fi
3abf7e61 3569 fi
6acf9653 3570fi
00c7100f 3571
871b22db 3572# Check to see if 'darwin' or 'darwin-export' can win.
3573if test x$enable_symvers = xdarwin-export ; then
3574 enable_symvers=darwin
3575fi
3576
55f10c87 3577# Check if 'sun' was requested on non-Solaris 2 platforms.
3578if test x$enable_symvers = xsun ; then
3579 case ${target_os} in
3580 solaris2*)
3581 # All fine.
3582 ;;
3583 *)
3584 # Unlikely to work.
3585 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3586 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3587 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3588 enable_symvers=no
3589 ;;
3590 esac
3591fi
3592
d414d318 3593# Check to see if 'gnu' can win.
dca89719 3594if test $enable_symvers = gnu ||
3595 test $enable_symvers = gnu-versioned-namespace ||
55f10c87 3596 test $enable_symvers = sun; then
d414d318 3597 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
43390bfe 3598 AC_MSG_CHECKING([for shared libgcc])
3599 ac_save_CFLAGS="$CFLAGS"
3600 CFLAGS=' -lgcc_s'
68224f8d 3601 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
43390bfe 3602 CFLAGS="$ac_save_CFLAGS"
71558bab 3603 if test $glibcxx_shared_libgcc = no; then
3604 cat > conftest.c <<EOF
3605int main (void) { return 0; }
3606EOF
3607changequote(,)dnl
3608 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3609 -shared -shared-libgcc -o conftest.so \
3610 conftest.c -v 2>&1 >/dev/null \
3611 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3612changequote([,])dnl
3613 rm -f conftest.c conftest.so
3614 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3615 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3616 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3617 CFLAGS="$ac_save_CFLAGS"
3618 fi
3619 fi
5a64d8cf 3620 AC_MSG_RESULT($glibcxx_shared_libgcc)
3abf7e61 3621
3abf7e61 3622 # For GNU ld, we need at least this version. The format is described in
3623 # GLIBCXX_CHECK_LINKER_FEATURES above.
3624 glibcxx_min_gnu_ld_version=21400
00c7100f 3625
d414d318 3626 # If no shared libgcc, can't win.
3627 if test $glibcxx_shared_libgcc != yes; then
3628 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3629 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3630 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3631 enable_symvers=no
55f10c87 3632 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3633 : All interesting versions of Sun ld support sun style symbol versioning.
d414d318 3634 elif test $with_gnu_ld != yes ; then
6a3aad86 3635 # just fail for now
3abf7e61 3636 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3637 AC_MSG_WARN([=== you are not using the GNU linker.])
3638 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3639 enable_symvers=no
09ffaa43 3640 elif test $glibcxx_ld_is_gold = yes ; then
3641 : All versions of gold support symbol versioning.
3abf7e61 3642 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3643 # The right tools, the right setup, but too old. Fallbacks?
3644 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3645 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3646 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3647 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
4cce0a93 3648 AC_MSG_WARN([=== Symbol versioning will be disabled.])
6a3aad86 3649 enable_symvers=no
3650 fi
3651fi
3652
377fc3e8 3653# For libtool versioning info, format is CURRENT:REVISION:AGE
843555b5 3654libtool_VERSION=6:22:0
377fc3e8 3655
3656# Everything parsed; figure out what files and settings to use.
00c7100f 3657case $enable_symvers in
6a3aad86 3658 no)
871b22db 3659 SYMVER_FILE=config/abi/pre/none.ver
68224f8d 3660 ;;
00c7100f 3661 gnu)
871b22db 3662 SYMVER_FILE=config/abi/pre/gnu.ver
dca89719 3663 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3664 [Define to use GNU versioning in the shared library.])
3abf7e61 3665 ;;
1069247d 3666 gnu-versioned-namespace)
377fc3e8 3667 libtool_VERSION=7:0:0
1069247d 3668 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
dca89719 3669 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3670 [Define to use GNU namespace versioning in the shared library.])
1069247d 3671 ;;
871b22db 3672 darwin)
3673 SYMVER_FILE=config/abi/pre/gnu.ver
dca89719 3674 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3675 [Define to use darwin versioning in the shared library.])
68224f8d 3676 ;;
55f10c87 3677 sun)
3678 SYMVER_FILE=config/abi/pre/gnu.ver
dca89719 3679 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3680 [Define to use Sun versioning in the shared library.])
55f10c87 3681 ;;
00c7100f 3682esac
3683
871b22db 3684if test x$enable_symvers != xno ; then
3685 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3686 [Define to use symbol versioning in the shared library.])
3687fi
3688
551033af 3689AC_CACHE_CHECK([whether the target supports .symver directive],
3690 glibcxx_cv_have_as_symver_directive, [
3691 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3692 [], glibcxx_cv_have_as_symver_directive=yes,
3693 glibcxx_cv_have_as_symver_directive=no)])
3694if test $glibcxx_cv_have_as_symver_directive = yes; then
3695 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3696 [Define to 1 if the target assembler supports .symver directive.])
3697fi
3698
871b22db 3699AC_SUBST(SYMVER_FILE)
3700AC_SUBST(port_specific_symbol_files)
3701GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3702GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
1069247d 3703GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
871b22db 3704GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
55f10c87 3705GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
871b22db 3706AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3707
55f10c87 3708if test $enable_symvers != no ; then
3709 case ${target_os} in
3710 # The Solaris 2 runtime linker doesn't support the GNU extension of
3711 # binding the same symbol to different versions
3712 solaris2*)
fb6822c1 3713 ;;
55f10c87 3714 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3715 *)
44d2766e 3716 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
dca89719 3717 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
fb6822c1 3718 ;;
55f10c87 3719 esac
3720fi
55f10c87 3721
871b22db 3722# Now, set up compatibility support, if any.
e4371cce 3723# In addition, need this to deal with std::size_t mangling in
3724# src/compatibility.cc. In a perfect world, could use
3725# typeid(std::size_t).name()[0] to do direct substitution.
3726AC_MSG_CHECKING([for size_t as unsigned int])
3727ac_save_CFLAGS="$CFLAGS"
3728CFLAGS="-Werror"
dca89719 3729AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3730 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
e4371cce 3731CFLAGS=$ac_save_CFLAGS
3732if test "$glibcxx_size_t_is_i" = yes; then
3733 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3734fi
3735AC_MSG_RESULT([$glibcxx_size_t_is_i])
3736
3737AC_MSG_CHECKING([for ptrdiff_t as int])
3738ac_save_CFLAGS="$CFLAGS"
3739CFLAGS="-Werror"
dca89719 3740AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3741 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
e4371cce 3742CFLAGS=$ac_save_CFLAGS
3743if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3744 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3745fi
3746AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
68224f8d 3747])
3748
3749
3750dnl
3751dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3752dnl We must stage the required headers so that they will be installed
3753dnl with the library (unlike libgcc, the STL implementation is provided
3754dnl solely within headers). Since we must not inject random user-space
3755dnl macro names into user-provided C++ code, we first stage into <file>-in
3756dnl and process to <file> with an output command. The reason for a two-
3757dnl stage process here is to correctly handle $srcdir!=$objdir without
3758dnl having to write complex code (the sed commands to clean the macro
3759dnl namespace are complex and fragile enough as it is). We must also
3760dnl add a relative path so that -I- is supported properly.
3761dnl
017f22df 3762dnl Substs:
3763dnl thread_header
3764dnl
2ad02b6c 3765AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
68224f8d 3766 AC_MSG_CHECKING([for thread model used by GCC])
f4a06a64 3767 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
68224f8d 3768 AC_MSG_RESULT([$target_thread_file])
017f22df 3769 GCC_AC_THREAD_HEADER([$target_thread_file])
68224f8d 3770])
3771
3772
add2055d 3773dnl
3774dnl Check if gthread implementation defines the types and functions
3775dnl required by the c++0x thread library. Conforming gthread
3776dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3777dnl
3b7b1092 3778dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3779dnl
add2055d 3780AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3b7b1092 3781 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3782
3783 if test x$enable_libstdcxx_threads = xauto ||
3784 test x$enable_libstdcxx_threads = xyes; then
3785
add2055d 3786 AC_LANG_SAVE
3787 AC_LANG_CPLUSPLUS
3788
3789 ac_save_CXXFLAGS="$CXXFLAGS"
630d52ca 3790 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3791 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
add2055d 3792
7a0b241e 3793 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3794 case $target_thread_file in
3795 posix)
3796 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3797 esac
3798
3799 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
24335a64 3800
3801 AC_TRY_COMPILE([#include <unistd.h>],
3802 [
7a0b241e 3803 // In case of POSIX threads check _POSIX_TIMEOUTS.
3804 #if (defined(_PTHREADS) \
0559575c 3805 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
24335a64 3806 #error
3807 #endif
3808 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3809
3810 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
0559575c 3811 [Define to 1 if mutex_timedlock is available.])
24335a64 3812
3813 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3814 else res_mutex_timedlock=no ; fi
3815 AC_MSG_RESULT([$res_mutex_timedlock])
3816
add2055d 3817 AC_MSG_CHECKING([for gthreads library])
3818
7a0b241e 3819 AC_TRY_COMPILE([#include "gthr.h"],
add2055d 3820 [
a4290503 3821 #ifndef __GTHREADS_CXX0X
3822 #error
3823 #endif
3efb5d22 3824 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3b7b1092 3825 else
3826 ac_has_gthreads=no
3827 fi
add2055d 3828
3829 AC_MSG_RESULT([$ac_has_gthreads])
3830
3831 if test x"$ac_has_gthreads" = x"yes"; then
3832 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
dca89719 3833 [Define if gthreads library is available.])
e6a8d251 3834
3835 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
3836 AC_CHECK_TYPE([pthread_rwlock_t],
3837 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
3838 [Define if POSIX read/write locks are available in <gthr.h>.])],
3839 [],
3840 [#include "gthr.h"])
add2055d 3841 fi
3842
3843 CXXFLAGS="$ac_save_CXXFLAGS"
3844 AC_LANG_RESTORE
3845])
3846
3847
68224f8d 3848# Check whether LC_MESSAGES is available in <locale.h>.
3849# Ulrich Drepper <drepper@cygnus.com>, 1995.
3850#
3851# This file file be copied and used freely without restrictions. It can
3852# be used in projects which are not available under the GNU Public License
3853# but which still want to provide support for the GNU gettext functionality.
3854# Please note that the actual code is *not* freely available.
2ad02b6c 3855AC_DEFUN([AC_LC_MESSAGES], [
68224f8d 3856 AC_CHECK_HEADER(locale.h, [
3857 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
f40a62d0 3858 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
68224f8d 3859 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3860 if test $ac_cv_val_LC_MESSAGES = yes; then
dca89719 3861 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3862 [Define if LC_MESSAGES is available in <locale.h>.])
68224f8d 3863 fi
3864 ])
3865])
3866
bdbf421c 3867dnl
3868dnl Check whether rdrand is supported in the assembler.
3869AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3870 AC_MSG_CHECKING([for rdrand support in assembler])
65facd7d 3871 AC_CACHE_VAL(ac_cv_x86_rdrand, [
bdbf421c 3872 ac_cv_x86_rdrand=no
3873 case "$target" in
3874 i?86-*-* | \
3875 x86_64-*-*)
3876 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3877 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3878 esac
3879 ])
3880 if test $ac_cv_x86_rdrand = yes; then
3881 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3882 [ Defined if as can handle rdrand. ])
3883 fi
3884 AC_MSG_RESULT($ac_cv_x86_rdrand)
3885])
3886
f4d90d64 3887dnl
3888dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3889dnl
3890AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3891
3892 AC_LANG_SAVE
3893 AC_LANG_CPLUSPLUS
3894 ac_save_CXXFLAGS="$CXXFLAGS"
3895 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3896
3897 AC_MSG_CHECKING([for get_nprocs])
3898 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3899 GCC_TRY_COMPILE_OR_LINK(
3900 [#include <sys/sysinfo.h>],
3901 [int n = get_nprocs();],
3902 [glibcxx_cv_GET_NPROCS=yes],
3903 [glibcxx_cv_GET_NPROCS=no])
3904 ])
3905 if test $glibcxx_cv_GET_NPROCS = yes; then
3906 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3907 fi
3908 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3909
3910 CXXFLAGS="$ac_save_CXXFLAGS"
3911 AC_LANG_RESTORE
3912])
3913
3914dnl
3915dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
3916dnl
3917AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
3918
3919 AC_LANG_SAVE
3920 AC_LANG_CPLUSPLUS
3921 ac_save_CXXFLAGS="$CXXFLAGS"
3922 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3923
3924 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
3925 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
3926 GCC_TRY_COMPILE_OR_LINK(
3927 [#include <unistd.h>],
3928 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
3929 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
3930 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
3931 ])
3932 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
3933 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
3934 fi
3935 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
3936
3937 CXXFLAGS="$ac_save_CXXFLAGS"
3938 AC_LANG_RESTORE
3939])
3940
da22c41a 3941dnl
3942dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
3943dnl
3944AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
3945
3946 AC_LANG_SAVE
3947 AC_LANG_CPLUSPLUS
3948 ac_save_CXXFLAGS="$CXXFLAGS"
3949 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3950
3951 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
3952 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
3953 GCC_TRY_COMPILE_OR_LINK(
3954 [#include <unistd.h>],
3955 [int n = sysconf(_SC_NPROC_ONLN);],
3956 [glibcxx_cv_SC_NPROC_ONLN=yes],
3957 [glibcxx_cv_SC_NPROC_ONLN=no])
3958 ])
3959 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
3960 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
3961 fi
3962 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
3963
3964 CXXFLAGS="$ac_save_CXXFLAGS"
3965 AC_LANG_RESTORE
3966])
3967
3968dnl
3969dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
3970dnl
3971AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
3972
3973 AC_LANG_SAVE
3974 AC_LANG_CPLUSPLUS
3975 ac_save_CXXFLAGS="$CXXFLAGS"
3976 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3977
3978 AC_MSG_CHECKING([for pthreads_num_processors_np])
3979 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
3980 GCC_TRY_COMPILE_OR_LINK(
3981 [#include <pthread.h>],
3982 [int n = pthread_num_processors_np();],
3983 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
3984 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
3985 ])
3986 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
3987 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
3988 fi
3989 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
3990
3991 CXXFLAGS="$ac_save_CXXFLAGS"
3992 AC_LANG_RESTORE
3993])
3994
3995dnl
3996dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
3997dnl
3998AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
3999
4000 AC_LANG_SAVE
4001 AC_LANG_CPLUSPLUS
4002 ac_save_CXXFLAGS="$CXXFLAGS"
4003 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4004
4005 AC_MSG_CHECKING([for hw.ncpu sysctl])
4006 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
4007 GCC_TRY_COMPILE_OR_LINK(
4008 [
4009 #include <stddef.h>
4010 #include <sys/sysctl.h>
4011 ],
4012 [
4013 int count;
4014 size_t size = sizeof(count);
4015 int mib[] = { CTL_HW, HW_NCPU };
4016 sysctl(mib, 2, &count, &size, NULL, 0);
4017 ],
4018 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
4019 [glibcxx_cv_SYSCTL_HW_NCPU=no])
4020 ])
4021 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
4022 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
4023 fi
4024 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
4025
4026 CXXFLAGS="$ac_save_CXXFLAGS"
4027 AC_LANG_RESTORE
4028])
f4d90d64 4029
0559575c 4030dnl
4031dnl Check to see if python pretty printing can be activated.
4032dnl
4033dnl --with-python-dir=dir
4034dnl installs directory into $prefix/dir
4035AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4036
4037AC_MSG_CHECKING([for custom python install directory])
4038AC_ARG_WITH([python-dir],
4039 AS_HELP_STRING([--with-python-dir],
4040 [the location to install Python modules. This path is relative starting from the prefix.]),
4041 [with_python_dir=$withval], [with_python_dir="no"])
4042AC_MSG_RESULT(${with_python_dir})
4043
4044# Needed for installing Python modules during make install.
4045python_mod_dir="${with_python_dir}"
4046AC_SUBST(python_mod_dir)
4047GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4048])
4049
413e9930 4050dnl
4051dnl Check to see if -Werror is disabled.
4052dnl
4053dnl --enable-werror/--disable-werror
4054AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4055 AC_MSG_CHECKING([for -Werror])
4056 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4057 AC_MSG_RESULT($enable_werror)
4058 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4059])
4060
e1150b06 4061dnl
4062dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4063dnl and define _GLIBCXX_USE_TMPNAM.
4064dnl
4065AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4066dnl
4067 AC_LANG_SAVE
4068 AC_LANG_CPLUSPLUS
4069 ac_save_CXXFLAGS="$CXXFLAGS"
4070 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4071dnl
4072 AC_MSG_CHECKING([for tmpnam])
4073 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
4074 GCC_TRY_COMPILE_OR_LINK(
4075 [#include <stdio.h>],
4076 [char *tmp = tmpnam(NULL);],
4077 [glibcxx_cv_TMPNAM=yes],
4078 [glibcxx_cv_TMPNAM=no])
4079 ])
4080 if test $glibcxx_cv_TMPNAM = yes; then
4081 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4082 fi
4083 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
4084dnl
4085 CXXFLAGS="$ac_save_CXXFLAGS"
4086 AC_LANG_RESTORE
4087])
0559575c 4088
2724b74a 4089dnl
4090dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4091dnl Some versions of sdt.h were not compatible with C++11.
4092dnl
4093AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
cad5a9dc 4094 AC_MSG_CHECKING([for suitable sys/sdt.h])
2724b74a 4095 # Note that this test has to be run with the C language.
4096 # Otherwise, sdt.h will try to include some headers from
4097 # libstdc++ itself.
4098 AC_LANG_SAVE
4099 AC_LANG_C
4100 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
4101 # Because we have to run the test in C, we use grep rather
4102 # than the compiler to check for the bug. The bug is that
4103 # were strings without trailing whitespace, causing g++
4104 # to look for operator"". The pattern searches for the fixed
4105 # output.
4106 AC_EGREP_CPP([ \",\" ], [
4107 #include <sys/sdt.h>
4108 int f() { STAP_PROBE(hi, bob); }
4109 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4110 ])
4111 AC_LANG_RESTORE
4112 if test $glibcxx_cv_sys_sdt_h = yes; then
4113 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4114 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4115 fi
4116 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
4117])
4118
60f5701c 4119dnl
63f54259 4120dnl Control whether the library should define symbols for old and new ABIs.
4121dnl This affects definitions of strings, stringstreams and locale facets.
60f5701c 4122dnl
63f54259 4123dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
60f5701c 4124dnl
4125dnl Defines:
63f54259 4126dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
60f5701c 4127dnl
63f54259 4128AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4129 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
30915773 4130 if test x$enable_symvers = xgnu-versioned-namespace; then
4131 # gnu-versioned-namespace is incompatible with the dual ABI.
4132 enable_libstdcxx_dual_abi="no"
4133 fi
63f54259 4134 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4135 AC_MSG_NOTICE([dual ABI is disabled])
d9f6f79e 4136 default_libstdcxx_abi="gcc4-compatible"
60f5701c 4137 fi
63f54259 4138 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
60f5701c 4139])
4140
63f54259 4141dnl
4142dnl Check to see which ABI should be enabled by default.
4143dnl
d9f6f79e 4144dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
63f54259 4145dnl
4146dnl Defines:
4147dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4148dnl
4149AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4150 if test x$enable_libstdcxx_dual_abi = xyes; then
4151 AC_MSG_CHECKING([for default std::string ABI to use])
4152 AC_ARG_WITH([default-libstdcxx-abi],
4153 AS_HELP_STRING([--with-default-libstdcxx-abi],
4154 [set the std::string ABI to use by default]),
4155 [case "$withval" in
d9f6f79e 4156 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4157 new|cxx11) default_libstdcxx_abi="new" ;;
4158 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4159 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4160 esac
4161 ],
4162 [default_libstdcxx_abi="new"])
63f54259 4163 AC_MSG_RESULT(${default_libstdcxx_abi})
4164 fi
d9f6f79e 4165 if test $default_libstdcxx_abi = "new"; then
63f54259 4166 glibcxx_cxx11_abi=1
4167 glibcxx_cxx98_abi=0
4168 else
4169 glibcxx_cxx11_abi=0
4170 glibcxx_cxx98_abi=1
4171 fi
4172 AC_SUBST(glibcxx_cxx98_abi)
4173 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4174])
4175
5924b28e 4176dnl
4177dnl Check to see whether to build libstdc++fs.a
4178dnl
4179dnl --enable-libstdcxx-filesystem-ts
4180dnl
4181AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4182 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4183 [turns on ISO/IEC TS 18822 support],
4184 [permit yes|no|auto])
4185
4186 AC_MSG_CHECKING([whether to build Filesystem TS support])
e16e2d2c 4187 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4188 enable_libstdcxx_filesystem_ts=no
4189 fi
5924b28e 4190 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4191 case "${target_os}" in
4192 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4193 enable_libstdcxx_filesystem_ts=yes
4194 ;;
4195 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
4196 enable_libstdcxx_filesystem_ts=yes
4197 ;;
4198 solaris*)
de11012f 4199 enable_libstdcxx_filesystem_ts=yes
5924b28e 4200 ;;
4201 *)
4202 enable_libstdcxx_filesystem_ts=no
4203 ;;
4204 esac
4205 fi
4206 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4207 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4208])
4209
4210dnl
4211dnl Check whether the library calls required by the Filesystem TS are present
4212dnl and define _GLIBCXX_USE_REALPATH and _GLIBCXX_USE_UTIMENSAT.
4213dnl
4214AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4215dnl
4216 AC_LANG_SAVE
4217 AC_LANG_CPLUSPLUS
4218 ac_save_CXXFLAGS="$CXXFLAGS"
4219 CXXFLAGS="$CXXFLAGS -fno-exceptions"
698d31e1 4220dnl
4221 AC_MSG_CHECKING([for struct dirent.d_type])
4222 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
4223 GCC_TRY_COMPILE_OR_LINK(
4224 [#include <dirent.h>],
4225 [
4226 struct dirent d;
4227 if (sizeof d.d_type) return 0;
4228 ],
4229 [glibcxx_cv_dirent_d_type=yes],
4230 [glibcxx_cv_dirent_d_type=no])
4231 ])
4232 if test $glibcxx_cv_dirent_d_type = yes; then
8dabee1b 4233 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
698d31e1 4234 fi
4235 AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
5924b28e 4236dnl
4237 AC_MSG_CHECKING([for realpath])
4238 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
4239 GCC_TRY_COMPILE_OR_LINK(
fc466aaf 4240 [
4241 #include <stdlib.h>
4242 #include <unistd.h>
4243 ],
4244 [
4245 #if _XOPEN_VERSION < 500
4246 #error
4247 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4248 char *tmp = realpath((const char*)NULL, (char*)NULL);
4249 #else
4250 #error
4251 #endif
4252 ],
5924b28e 4253 [glibcxx_cv_realpath=yes],
4254 [glibcxx_cv_realpath=no])
4255 ])
4256 if test $glibcxx_cv_realpath = yes; then
fc466aaf 4257 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
5924b28e 4258 fi
4259 AC_MSG_RESULT($glibcxx_cv_realpath)
4260dnl
4261 AC_MSG_CHECKING([for utimensat])
4262 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl
4263 GCC_TRY_COMPILE_OR_LINK(
4264 [
4265 #include <fcntl.h>
4266 #include <sys/stat.h>
4267 ],
4268 [
4269 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4270 int i = utimensat(AT_FDCWD, "path", ts, 0);
4271 ],
4272 [glibcxx_cv_utimensat=yes],
4273 [glibcxx_cv_utimensat=no])
4274 ])
4275 if test $glibcxx_cv_utimensat = yes; then
4276 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4277 fi
4278 AC_MSG_RESULT($glibcxx_cv_utimensat)
4279dnl
4280 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec])
4281 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl
4282 GCC_TRY_COMPILE_OR_LINK(
4283 [ #include <sys/stat.h> ],
4284 [
4285 struct stat st;
4286 return st.st_mtim.tv_nsec;
4287 ],
4288 [glibcxx_cv_st_mtim=yes],
4289 [glibcxx_cv_st_mtim=no])
4290 ])
4291 if test $glibcxx_cv_st_mtim = yes; then
4292 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4293 fi
4294 AC_MSG_RESULT($glibcxx_cv_st_mtim)
21b54875 4295dnl
4296 AC_MSG_CHECKING([for fchmod])
4297 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl
4298 GCC_TRY_COMPILE_OR_LINK(
4299 [#include <sys/stat.h>],
4300 [fchmod(1, S_IWUSR);],
4301 [glibcxx_cv_fchmod=yes],
4302 [glibcxx_cv_fchmod=no])
4303 ])
4304 if test $glibcxx_cv_fchmod = yes; then
4305 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4306 fi
4307 AC_MSG_RESULT($glibcxx_cv_fchmod)
e16e2d2c 4308dnl
4309 AC_MSG_CHECKING([for fchmodat])
4310 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl
4311 GCC_TRY_COMPILE_OR_LINK(
4312 [
4313 #include <fcntl.h>
4314 #include <sys/stat.h>
4315 ],
4316 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4317 [glibcxx_cv_fchmodat=yes],
4318 [glibcxx_cv_fchmodat=no])
4319 ])
4320 if test $glibcxx_cv_fchmodat = yes; then
4321 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4322 fi
4323 AC_MSG_RESULT($glibcxx_cv_fchmodat)
21b54875 4324dnl
4325 AC_MSG_CHECKING([for sendfile that can copy files])
4326 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl
4327 case "${target_os}" in
4328 gnu* | linux* | solaris*)
4329 GCC_TRY_COMPILE_OR_LINK(
4330 [#include <sys/sendfile.h>],
4331 [sendfile(1, 2, (off_t*)NULL, sizeof 1);],
4332 [glibcxx_cv_sendfile=yes],
4333 [glibcxx_cv_sendfile=no])
4334 ;;
4335 *)
4336 glibcxx_cv_sendfile=no
4337 ;;
4338 esac
4339 ])
4340 if test $glibcxx_cv_sendfile = yes; then
4341 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/stat.h>.])
4342 fi
4343 AC_MSG_RESULT($glibcxx_cv_sendfile)
5924b28e 4344dnl
4345 CXXFLAGS="$ac_save_CXXFLAGS"
4346 AC_LANG_RESTORE
4347])
63f54259 4348
13143e13 4349dnl
4350dnl Check how size_t is mangled. Copied from libitm.
4351dnl
4352AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [
4353 AC_CACHE_CHECK([how size_t is mangled],
4354 glibcxx_cv_size_t_mangling, [
4355 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
4356 [glibcxx_cv_size_t_mangling=m], [
4357 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
4358 [glibcxx_cv_size_t_mangling=j], [
4359 AC_TRY_COMPILE([],
4360 [extern __SIZE_TYPE__ x; extern unsigned long long x;],
4361 [glibcxx_cv_size_t_mangling=y], [
4362 AC_TRY_COMPILE([],
4363 [extern __SIZE_TYPE__ x; extern unsigned short x;],
4364 [glibcxx_cv_size_t_mangling=t],
4365 [glibcxx_cv_size_t_mangling=x])
4366 ])
4367 ])
4368 ])
4369 ])
4370 if test $glibcxx_cv_size_t_mangling = x; then
4371 AC_MSG_ERROR([Unknown underlying type for size_t])
4372 fi
4373 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling],
4374 [Define to the letter to which size_t is mangled.])
4375])
4376
6b2678bb 4377# Macros from the top-level gcc directory.
55f10c87 4378m4_include([../config/gc++filt.m4])
6b2678bb 4379m4_include([../config/tls.m4])
017f22df 4380m4_include([../config/gthr.m4])
Mirror of https://gcc.gnu.org/git/gcc.git