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Introduce dg-add-options net_ts
[thirdparty/gcc.git] / libstdc++-v3 / acinclude.m4
CommitLineData
92eabea2
PE		 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
f214923c 10AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
92eabea2
PE		 11 m4_divert_text([glibcxx_diversion],dnl
12 AM_CONDITIONAL([$1],[$2])
13 )dnl
14])dnl
f214923c 15AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
92eabea2
PE		 16
17
ff66d28f
PE		 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
f214923c 23AC_DEFUN([GLIBCXX_CHECK_HOST], [
ff66d28f 24 . $glibcxx_srcdir/configure.host
f214923c
BK		 25 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
26 AC_MSG_NOTICE([OS config directory is $os_include_dir])
ff66d28f
PE		 27])
28
ff66d28f
PE		 29dnl
30dnl Initialize the rest of the library configury. At this point we have
31dnl variables like $host.
aebb8c22 32dnl
ff66d28f 33dnl Sets:
82ba99d5 34dnl SUBDIRS
ff66d28f
PE		 35dnl Substs:
36dnl glibcxx_builddir (absolute path)
37dnl glibcxx_srcdir (absolute path)
5d1c8e77 38dnl toplevel_builddir (absolute path)
ff66d28f
PE		 39dnl toplevel_srcdir (absolute path)
40dnl with_cross_host
41dnl with_newlib
42dnl with_target_subdir
43dnl plus
44dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45dnl - default settings for all AM_CONFITIONAL test variables
46dnl - lots of tools, like CC and CXX
aebb8c22 47dnl
f214923c 48AC_DEFUN([GLIBCXX_CONFIGURE], [
82ba99d5
PE		 49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
a9d49e96 52 m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/c++17 src/filesystem doc po testsuite python])
82ba99d5
PE		 53 SUBDIRS='glibcxx_SUBDIRS'
54
d2caef2e
PE		 55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
3d7c150e 58 glibcxx_builddir=`${PWDCMD-pwd}`
d2caef2e 59 case $srcdir in
ff66d28f
PE		 60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
d2caef2e 62 esac
5d1c8e77 63 toplevel_builddir=${glibcxx_builddir}/..
ff66d28f 64 toplevel_srcdir=${glibcxx_srcdir}/..
3d7c150e
BK		 65 AC_SUBST(glibcxx_builddir)
66 AC_SUBST(glibcxx_srcdir)
5d1c8e77 67 AC_SUBST(toplevel_builddir)
ff66d28f 68 AC_SUBST(toplevel_srcdir)
d2caef2e 69
ff66d28f
PE		 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],
b329dd10 74 [configuring in a subdirectory]))
ff66d28f
PE		 75
76 AC_ARG_WITH([cross-host],
77 AC_HELP_STRING([--with-cross-host=HOST],
b329dd10 78 [configuring with a cross compiler]))
ff66d28f
PE		 79
80 AC_ARG_WITH([newlib],
81 AC_HELP_STRING([--with-newlib],
b329dd10 82 [assume newlib as a system C library]))
ff66d28f 83
ff66d28f
PE		 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
5780a46b
BK		 89 AC_CHECK_TOOL(AS, as)
90 AC_CHECK_TOOL(AR, ar)
46840bcd 91 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
b2dad0e3 92
5780a46b 93 AM_MAINTAINER_MODE
b2dad0e3 94
92eabea2
PE		 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
16da539b 99
176d6eb0
GP		 100 # Check for C library flavor since GNU/Linux platforms use different
101 # configuration directories depending on the C library in use.
464aea98
JM		 102 AC_EGREP_CPP([_using_uclibc], [
103 #include <stdio.h>
104 #if __UCLIBC__
105 _using_uclibc
106 #endif
107 ], uclibc=yes, uclibc=no)
108
aa6a73b9
MK		 109 AC_EGREP_CPP([_using_bionic], [
110 #include <stdio.h>
111 #if __BIONIC__
112 _using_bionic
113 #endif
114 ], bionic=yes, bionic=no)
115
ff66d28f
PE		 116 # Find platform-specific directories containing configuration info.
117 # Also possibly modify flags used elsewhere, as needed by the platform.
3d7c150e 118 GLIBCXX_CHECK_HOST
b2dad0e3
BK		 119])
120
121
c470c17d 122dnl
52b55e7d
PE		 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.
b2dad0e3 126dnl
ff66d28f
PE		 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.
c21b6f87 133dnl
f214923c 134AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
a4e99046 135 # All these tests are for C++; save the language and the compiler flags.
52b55e7d 136 # The CXXFLAGS thing is suspicious, but based on similar bits previously
3d7c150e 137 # found in GLIBCXX_CONFIGURE.
a4e99046
PE		 138 AC_LANG_SAVE
139 AC_LANG_CPLUSPLUS
140 ac_test_CXXFLAGS="${CXXFLAGS+set}"
141 ac_save_CXXFLAGS="$CXXFLAGS"
a4e99046 142
c470c17d
BK		 143 # Check for -ffunction-sections -fdata-sections
144 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
85ee35ca
BK		 145 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
146 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
c470c17d
BK		 147 if test "$ac_test_CXXFLAGS" = set; then
148 CXXFLAGS="$ac_save_CXXFLAGS"
149 else
150 # this is the suspicious part
151 CXXFLAGS=''
152 fi
6aa43d99 153 if test x"$ac_fdsections" = x"yes"; then
c470c17d
BK		 154 SECTION_FLAGS='-ffunction-sections -fdata-sections'
155 fi
156 AC_MSG_RESULT($ac_fdsections)
157
a4e99046 158 AC_LANG_RESTORE
c470c17d 159 AC_SUBST(SECTION_FLAGS)
b2dad0e3
BK		 160])
161
c470c17d
BK		 162
163dnl
421173e6
PE		 164dnl If GNU ld is in use, check to see if tricky linker opts can be used. If
165dnl the native linker is in use, all variables will be defined to something
166dnl safe (like an empty string).
167dnl
ff66d28f
PE		 168dnl Defines:
169dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
a429affe 170dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
ff66d28f
PE		 171dnl LD (as a side effect of testing)
172dnl Sets:
173dnl with_gnu_ld
d60a2d4d 174dnl glibcxx_ld_is_gold (set to "no" or "yes")
ff66d28f
PE		 175dnl glibcxx_gnu_ld_version (possibly)
176dnl
177dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will
178dnl set glibcxx_gnu_ld_version to 12345. Zeros cause problems.
c470c17d 179dnl
f214923c 180AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
421173e6
PE		 181 # If we're not using GNU ld, then there's no point in even trying these
182 # tests. Check for that first. We should have already tested for gld
183 # by now (in libtool), but require it now just to be safe...
654421eb
DE		 184 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
185 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
421173e6 186 AC_REQUIRE([AC_PROG_LD])
ff66d28f 187 AC_REQUIRE([AC_PROG_AWK])
5bd17d39 188
c98b201b
PE		 189 # The name set by libtool depends on the version of libtool. Shame on us
190 # for depending on an impl detail, but c'est la vie. Older versions used
191 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on
192 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually
193 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't
194 # set (hence we're using an older libtool), then set it.
195 if test x${with_gnu_ld+set} != xset; then
196 if test x${ac_cv_prog_gnu_ld+set} != xset; then
197 # We got through "ac_require(ac_prog_ld)" and still not set? Huh?
198 with_gnu_ld=no
199 else
200 with_gnu_ld=$ac_cv_prog_gnu_ld
201 fi
202 fi
203
204 # Start by getting the version number. I think the libtool test already
205 # does some of this, but throws away the result.
d60a2d4d 206 glibcxx_ld_is_gold=no
e2c104d8
BK		 207 if test x"$with_gnu_ld" = x"yes"; then
208 AC_MSG_CHECKING([for ld version])
209 changequote(,)
d60a2d4d
ILT		 210 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
211 glibcxx_ld_is_gold=yes
212 fi
c82852f7 213 ldver=`$LD --version 2>/dev/null |
89c74f4a 214 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'`
e2c104d8
BK		 215 changequote([,])
216 glibcxx_gnu_ld_version=`echo $ldver | \
b329dd10 217 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
e2c104d8
BK		 218 AC_MSG_RESULT($glibcxx_gnu_ld_version)
219 fi
c98b201b 220
5bd17d39 221 # Set --gc-sections.
d60a2d4d
ILT		 222 glibcxx_have_gc_sections=no
223 if test "$glibcxx_ld_is_gold" = "yes"; then
224 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
225 glibcxx_have_gc_sections=yes
226 fi
227 else
228 glibcxx_gcsections_min_ld=21602
b329dd10 229 if test x"$with_gnu_ld" = x"yes" &&
ac2b2479 230 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
d60a2d4d
ILT		 231 glibcxx_have_gc_sections=yes
232 fi
233 fi
234 if test "$glibcxx_have_gc_sections" = "yes"; then
ac2b2479
BK		 235 # Sufficiently young GNU ld it is! Joy and bunny rabbits!
236 # NB: This flag only works reliably after 2.16.1. Configure tests
237 # for this are difficult, so hard wire a value that should work.
421173e6 238
421173e6
PE		 239 ac_test_CFLAGS="${CFLAGS+set}"
240 ac_save_CFLAGS="$CFLAGS"
2a0ab51c 241 CFLAGS='-Wl,--gc-sections'
421173e6
PE		 242
243 # Check for -Wl,--gc-sections
244 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
acb6e9be
BK		 245 AC_TRY_LINK([ int one(void) { return 1; }
246 int two(void) { return 2; }
247 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
360e8759
L		 248 if test "$ac_gcsections" = "yes"; then
249 rm -f conftest.c
250 touch conftest.c
251 if $CC -c conftest.c; then
252 if $LD --gc-sections -o conftest conftest.o 2>&1 | \
253 grep "Warning: gc-sections option ignored" > /dev/null; then
254 ac_gcsections=no
255 fi
256 fi
257 rm -f conftest.c conftest.o conftest
258 fi
acb6e9be
BK		 259 if test "$ac_gcsections" = "yes"; then
260 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
261 fi
262 AC_MSG_RESULT($ac_gcsections)
263
421173e6
PE		 264 if test "$ac_test_CFLAGS" = set; then
265 CFLAGS="$ac_save_CFLAGS"
266 else
267 # this is the suspicious part
268 CFLAGS=''
269 fi
5bd17d39 270 fi
a9117427 271
a429affe 272 # Set -z,relro.
952c7b74 273 # Note this is only for shared objects.
a429affe
BK		 274 ac_ld_relro=no
275 if test x"$with_gnu_ld" = x"yes"; then
276 AC_MSG_CHECKING([for ld that supports -Wl,-z,relro])
277 cxx_z_relo=`$LD -v --help 2>/dev/null | grep "z relro"`
278 if test -n "$cxx_z_relo"; then
279 OPT_LDFLAGS="-Wl,-z,relro"
280 ac_ld_relro=yes
281 fi
282 AC_MSG_RESULT($ac_ld_relro)
283 fi
284
5bd17d39 285 # Set linker optimization flags.
6aa43d99 286 if test x"$with_gnu_ld" = x"yes"; then
654421eb 287 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
421173e6 288 fi
5bd17d39 289
c470c17d 290 AC_SUBST(SECTION_LDFLAGS)
421173e6 291 AC_SUBST(OPT_LDFLAGS)
c470c17d
BK		 292])
293
294
b2dad0e3 295dnl
ff66d28f
PE		 296dnl Check for headers for, and arguments to, the setrlimit() function.
297dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
6aa43d99 298dnl
ff66d28f 299dnl Defines:
b329dd10 300dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
2ae6e982 301dnl various HAVE_LIMIT_* for individual limit names
6aa43d99 302dnl
f214923c 303AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
e0103440 304 AC_MSG_CHECKING([for RLIMIT_$1])
ff66d28f
PE		 305 AC_TRY_COMPILE(
306 [#include <unistd.h>
307 #include <sys/time.h>
308 #include <sys/resource.h>
309 ],
310 [ int f = RLIMIT_$1 ; ],
311 [glibcxx_mresult=1], [glibcxx_mresult=0])
2ae6e982 312 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
b329dd10 313 [Only used in build directory testsuite_hooks.h.])
e0103440
GK		 314 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
315 AC_MSG_RESULT($res)
ff66d28f
PE		 316])
317
f214923c 318AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
ff66d28f
PE		 319 setrlimit_have_headers=yes
320 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
b329dd10
BK		 321 [],
322 [setrlimit_have_headers=no])
ff66d28f
PE		 323 # If don't have the headers, then we can't run the tests now, and we
324 # won't be seeing any of these during testsuite compilation.
325 if test $setrlimit_have_headers = yes; then
326 # Can't do these in a loop, else the resulting syntax is wrong.
327 GLIBCXX_CHECK_SETRLIMIT_ancilliary(DATA)
328 GLIBCXX_CHECK_SETRLIMIT_ancilliary(RSS)
329 GLIBCXX_CHECK_SETRLIMIT_ancilliary(VMEM)
330 GLIBCXX_CHECK_SETRLIMIT_ancilliary(AS)
2ae6e982 331 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
ff66d28f
PE		 332
333 # Check for rlimit, setrlimit.
6d26724a 334 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
ff66d28f 335 AC_TRY_COMPILE(
b329dd10
BK		 336 [#include <unistd.h>
337 #include <sys/time.h>
338 #include <sys/resource.h>
339 ],
340 [struct rlimit r;
341 setrlimit(0, &r);],
342 [glibcxx_cv_setrlimit=yes], [glibcxx_cv_setrlimit=no])
ff66d28f
PE		 343 ])
344 fi
345
2ae6e982 346 AC_MSG_CHECKING([for testsuite resource limits support])
6d26724a 347 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
2ae6e982 348 ac_res_limits=yes
4651e622 349 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
b329dd10
BK		 350 [Define if using setrlimit to set resource limits during
351 "make check"])
ff66d28f 352 else
2ae6e982 353 ac_res_limits=no
ff66d28f 354 fi
2ae6e982 355 AC_MSG_RESULT($ac_res_limits)
6aa43d99
BK		 356])
357
358
6aa43d99 359dnl
ff66d28f
PE		 360dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
361dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
6aa43d99 362dnl
f214923c 363AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
74745ec5
PC		 364
365 AC_LANG_SAVE
366 AC_LANG_CPLUSPLUS
367 ac_save_CXXFLAGS="$CXXFLAGS"
368 CXXFLAGS="$CXXFLAGS -fno-exceptions"
369
e0103440 370 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
ff66d28f 371 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
74745ec5 372 GCC_TRY_COMPILE_OR_LINK(
ff66d28f
PE		 373 [#include <sys/stat.h>],
374 [struct stat buffer;
375 fstat(0, &buffer);
376 S_ISREG(buffer.st_mode);],
377 [glibcxx_cv_S_ISREG=yes],
378 [glibcxx_cv_S_ISREG=no])
379 ])
380 AC_CACHE_VAL(glibcxx_cv_S_IFREG, [
74745ec5 381 GCC_TRY_COMPILE_OR_LINK(
ff66d28f
PE		 382 [#include <sys/stat.h>],
383 [struct stat buffer;
384 fstat(0, &buffer);
385 S_IFREG & buffer.st_mode;],
386 [glibcxx_cv_S_IFREG=yes],
387 [glibcxx_cv_S_IFREG=no])
388 ])
e0103440 389 res=no
ff66d28f 390 if test $glibcxx_cv_S_ISREG = yes; then
b329dd10 391 AC_DEFINE(HAVE_S_ISREG, 1,
64e1a55d 392 [Define if S_ISREG is available in <sys/stat.h>.])
e0103440 393 res=S_ISREG
ff66d28f 394 elif test $glibcxx_cv_S_IFREG = yes; then
4651e622 395 AC_DEFINE(HAVE_S_IFREG, 1,
b329dd10 396 [Define if S_IFREG is available in <sys/stat.h>.])
e0103440 397 res=S_IFREG
ff66d28f 398 fi
e0103440 399 AC_MSG_RESULT($res)
74745ec5
PC		 400
401 CXXFLAGS="$ac_save_CXXFLAGS"
402 AC_LANG_RESTORE
b2dad0e3
BK		 403])
404
405
dcfa0bc8 406dnl
ff66d28f 407dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
dcfa0bc8 408dnl
f214923c 409AC_DEFUN([GLIBCXX_CHECK_POLL], [
74745ec5
PC		 410
411 AC_LANG_SAVE
412 AC_LANG_CPLUSPLUS
413 ac_save_CXXFLAGS="$CXXFLAGS"
414 CXXFLAGS="$CXXFLAGS -fno-exceptions"
415
e0103440 416 AC_MSG_CHECKING([for poll])
ff66d28f 417 AC_CACHE_VAL(glibcxx_cv_POLL, [
74745ec5 418 GCC_TRY_COMPILE_OR_LINK(
ff66d28f
PE		 419 [#include <poll.h>],
420 [struct pollfd pfd[1];
421 pfd[0].events = POLLIN;
422 poll(pfd, 1, 0);],
423 [glibcxx_cv_POLL=yes],
424 [glibcxx_cv_POLL=no])
425 ])
426 if test $glibcxx_cv_POLL = yes; then
4651e622 427 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
ff66d28f 428 fi
e0103440 429 AC_MSG_RESULT($glibcxx_cv_POLL)
74745ec5
PC		 430
431 CXXFLAGS="$ac_save_CXXFLAGS"
432 AC_LANG_RESTORE
ff66d28f
PE		 433])
434
435
436dnl
437dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
438dnl
f214923c 439AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
74745ec5
PC		 440
441 AC_LANG_SAVE
442 AC_LANG_CPLUSPLUS
443 ac_save_CXXFLAGS="$CXXFLAGS"
444 CXXFLAGS="$CXXFLAGS -fno-exceptions"
445
e0103440 446 AC_MSG_CHECKING([for writev])
ff66d28f 447 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
74745ec5 448 GCC_TRY_COMPILE_OR_LINK(
ff66d28f
PE		 449 [#include <sys/uio.h>],
450 [struct iovec iov[2];
451 writev(0, iov, 0);],
452 [glibcxx_cv_WRITEV=yes],
453 [glibcxx_cv_WRITEV=no])
454 ])
455 if test $glibcxx_cv_WRITEV = yes; then
4651e622 456 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
ff66d28f 457 fi
e0103440 458 AC_MSG_RESULT($glibcxx_cv_WRITEV)
74745ec5
PC		 459
460 CXXFLAGS="$ac_save_CXXFLAGS"
461 AC_LANG_RESTORE
ff66d28f
PE		 462])
463
464
3d05b345
PC		 465dnl
466dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
fc9ab7b4 467dnl Also check whether int64_t is actually a typedef to long or long long.
3d05b345 468dnl
f214923c 469AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
fc9ab7b4
PC		 470
471 AC_LANG_SAVE
472 AC_LANG_CPLUSPLUS
473
e0103440 474 AC_MSG_CHECKING([for int64_t])
3d05b345
PC		 475 AC_CACHE_VAL(glibcxx_cv_INT64_T, [
476 AC_TRY_COMPILE(
477 [#include <stdint.h>],
478 [int64_t var;],
479 [glibcxx_cv_INT64_T=yes],
480 [glibcxx_cv_INT64_T=no])
481 ])
fc9ab7b4 482
3d05b345 483 if test $glibcxx_cv_INT64_T = yes; then
4651e622 484 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
fc9ab7b4
PC		 485 AC_MSG_RESULT($glibcxx_cv_INT64_T)
486
487 AC_MSG_CHECKING([for int64_t as long])
488 AC_CACHE_VAL(glibcxx_cv_int64_t_long, [
489 AC_TRY_COMPILE(
b329dd10
BK		 490 [#include <stdint.h>
491 template<typename, typename> struct same { enum { value = -1 }; };
492 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
493 int array[same<int64_t, long>::value];], [],
fc9ab7b4
PC		 494 [glibcxx_cv_int64_t_long=yes], [glibcxx_cv_int64_t_long=no])
495 ])
496
497 if test $glibcxx_cv_int64_t_long = yes; then
498 AC_DEFINE(HAVE_INT64_T_LONG, 1, [Define if int64_t is a long.])
499 AC_MSG_RESULT($glibcxx_cv_int64_t_long)
500 fi
501
502 AC_MSG_CHECKING([for int64_t as long long])
503 AC_CACHE_VAL(glibcxx_cv_int64_t_long_long, [
504 AC_TRY_COMPILE(
b329dd10
BK		 505 [#include <stdint.h>
506 template<typename, typename> struct same { enum { value = -1 }; };
507 template<typename Tp> struct same<Tp, Tp> { enum { value = 1 }; };
508 int array[same<int64_t, long long>::value];], [],
fc9ab7b4
PC		 509 [glibcxx_cv_int64_t_long_long=yes], [glibcxx_cv_int64_t_long_long=no])
510 ])
511
512 if test $glibcxx_cv_int64_t_long_long = yes; then
513 AC_DEFINE(HAVE_INT64_T_LONG_LONG, 1, [Define if int64_t is a long long.])
514 AC_MSG_RESULT($glibcxx_cv_int64_t_long_long)
515 fi
3d05b345 516 fi
fc9ab7b4
PC		 517
518 AC_LANG_RESTORE
3d05b345
PC		 519])
520
521
522dnl
523dnl Check whether LFS support is available.
524dnl
f214923c 525AC_DEFUN([GLIBCXX_CHECK_LFS], [
0c6b814a 526 AC_LANG_SAVE
9d47bc51
PC		 527 AC_LANG_CPLUSPLUS
528 ac_save_CXXFLAGS="$CXXFLAGS"
b329dd10 529 CXXFLAGS="$CXXFLAGS -fno-exceptions"
e0103440 530 AC_MSG_CHECKING([for LFS support])
3d05b345 531 AC_CACHE_VAL(glibcxx_cv_LFS, [
74745ec5 532 GCC_TRY_COMPILE_OR_LINK(
0c6b814a
PC		 533 [#include <unistd.h>
534 #include <stdio.h>
dd5d134b 535 #include <sys/stat.h>
0c6b814a 536 ],
5c89246d
PC		 537 [FILE* fp;
538 fopen64("t", "w");
539 fseeko64(fp, 0, SEEK_CUR);
540 ftello64(fp);
dd5d134b
PC		 541 lseek64(1, 0, SEEK_CUR);
542 struct stat64 buf;
543 fstat64(1, &buf);],
3d05b345
PC		 544 [glibcxx_cv_LFS=yes],
545 [glibcxx_cv_LFS=no])
546 ])
547 if test $glibcxx_cv_LFS = yes; then
4651e622 548 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
3d05b345 549 fi
e0103440 550 AC_MSG_RESULT($glibcxx_cv_LFS)
9d47bc51
PC		 551 CXXFLAGS="$ac_save_CXXFLAGS"
552 AC_LANG_RESTORE
3d05b345
PC		 553])
554
555
1165dc50
PC		 556dnl
557dnl Check for whether a fully dynamic basic_string implementation should
558dnl be turned on, that does not put empty objects in per-process static
559dnl memory (mostly useful together with shared memory allocators, see PR
560dnl libstdc++/16612 for details).
561dnl
d7a3ef97
JY		 562dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
563dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
564dnl otherwise undefined
1165dc50
PC		 565dnl + Usage: GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
566dnl Where DEFAULT is either `yes' or `no'.
567dnl
568AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
569 GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
570 if test $enable_fully_dynamic_string = yes; then
d7a3ef97
JY		 571 enable_fully_dynamic_string_def=1
572 else
573 enable_fully_dynamic_string_def=0
1165dc50 574 fi
d7a3ef97
JY		 575 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
576 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
1165dc50
PC		 577])
578
579
ff66d28f
PE		 580dnl
581dnl Does any necessary configuration of the testsuite directory. Generates
582dnl the testsuite_hooks.h header.
583dnl
584dnl GLIBCXX_ENABLE_SYMVERS and GLIBCXX_IS_NATIVE must be done before this.
585dnl
586dnl Sets:
b329dd10 587dnl enable_abi_check
e3f78d9b
BK		 588dnl GLIBCXX_TEST_WCHAR_T
589dnl GLIBCXX_TEST_THREAD
ff66d28f
PE		 590dnl Substs:
591dnl baseline_dir
00fc1bf6 592dnl baseline_subdir_switch
ff66d28f 593dnl
f214923c 594AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
5a810362
MK		 595 # Do checks for resource limit functions.
596 GLIBCXX_CHECK_SETRLIMIT
ff66d28f 597
5a810362 598 if $GLIBCXX_IS_NATIVE ; then
ff66d28f
PE		 599 # Look for setenv, so that extended locale tests can be performed.
600 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
0646b059 601 fi
dbc66058 602
0646b059
GK		 603 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
604 test $enable_symvers != no; then
605 case "$host" in
606 *-*-cygwin*)
b329dd10 607 enable_abi_check=no ;;
0646b059 608 *)
b329dd10 609 enable_abi_check=yes ;;
0646b059 610 esac
dbc66058
DJ		 611 else
612 # Only build this as native, since automake does not understand
613 # CXX_FOR_BUILD.
614 enable_abi_check=no
ff66d28f 615 fi
b329dd10 616
ff66d28f 617 # Export file names for ABI checking.
68c512f6 618 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
ff66d28f 619 AC_SUBST(baseline_dir)
00fc1bf6
RO		 620 baseline_subdir_switch="$abi_baseline_subdir_switch"
621 AC_SUBST(baseline_subdir_switch)
ff66d28f
PE		 622])
623
624
b329dd10 625dnl
c1e0e100 626dnl Does any necessary configuration for docbook in the docs directory.
b329dd10
BK		 627dnl
628dnl XSLTPROC must be set before this
629dnl
630dnl Sets:
631dnl glibcxx_stylesheets
632dnl Substs:
633dnl XSL_STYLE_DIR
634dnl
635AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
636
c1e0e100 637AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
b329dd10
BK		 638glibcxx_stylesheets=no
639if test x${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
640 glibcxx_stylesheets=yes
641fi
642AC_MSG_RESULT($glibcxx_stylesheets)
643
644AC_MSG_CHECKING([for local stylesheet directory])
645glibcxx_local_stylesheets=no
646if test x"$glibcxx_stylesheets" = x"yes"; then
647 if test -d /usr/share/sgml/docbook/xsl-ns-stylesheets; then
648 glibcxx_local_stylesheets=yes
649 XSL_STYLE_DIR=/usr/share/sgml/docbook/xsl-ns-stylesheets
650 fi
651 if test -d /usr/share/xml/docbook/stylesheet/docbook-xsl-ns; then
652 glibcxx_local_stylesheets=yes
653 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/docbook-xsl-ns
654 fi
919bbe6e
AS		 655 if test -d /usr/share/xml/docbook/stylesheet/nwalsh5/current; then
656 glibcxx_local_stylesheets=yes
657 XSL_STYLE_DIR=/usr/share/xml/docbook/stylesheet/nwalsh5/current
658 fi
b329dd10
BK		 659fi
660AC_MSG_RESULT($glibcxx_local_stylesheets)
661
662if test x"$glibcxx_local_stylesheets" = x"yes"; then
663 AC_SUBST(XSL_STYLE_DIR)
664 AC_MSG_NOTICE($XSL_STYLE_DIR)
665else
666 glibcxx_stylesheets=no
667fi
c1e0e100
BK		 668
669# Check for epub3 dependencies.
670AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
671glibcxx_epub_stylesheets=no
672if test x"$glibcxx_local_stylesheets" = x"yes"; then
e9469833 673 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
c1e0e100
BK		 674 glibcxx_epub_stylesheets=yes
675 fi
676fi
677AC_MSG_RESULT($glibcxx_epub_stylesheets)
e9469833 678AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
c1e0e100 679
b329dd10
BK		 680])
681
682
ff66d28f
PE		 683dnl
684dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
685dnl
686dnl Substs:
687dnl GLIBCXX_INCLUDES
688dnl TOPLEVEL_INCLUDES
ff66d28f 689dnl
f214923c 690AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
0df3f383
PE		 691 # Used for every C++ compile we perform.
692 GLIBCXX_INCLUDES="\
693-I$glibcxx_builddir/include/$host_alias \
694-I$glibcxx_builddir/include \
695-I$glibcxx_srcdir/libsupc++"
ff66d28f 696
0df3f383 697 # For Canadian crosses, pick this up too.
ff66d28f 698 if test $CANADIAN = yes; then
37e0ff11 699 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
ff66d28f
PE		 700 fi
701
0df3f383 702 # Stuff in the actual top level. Currently only used by libsupc++ to
201cdb74
RO		 703 # get unwind* headers from the libgcc dir.
704 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
705 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
ff66d28f
PE		 706
707 # Now, export this to all the little Makefiles....
708 AC_SUBST(GLIBCXX_INCLUDES)
709 AC_SUBST(TOPLEVEL_INCLUDES)
ff66d28f
PE		 710])
711
712
713dnl
714dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
715dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
716dnl
717dnl Substs:
718dnl OPTIMIZE_CXXFLAGS
719dnl WARN_FLAGS
720dnl
f214923c 721AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
ff66d28f
PE		 722 # Optimization flags that are probably a good idea for thrill-seekers. Just
723 # uncomment the lines below and make, everything else is ready to go...
62801a96 724 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
ff66d28f 725 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
ff66d28f
PE		 726 AC_SUBST(OPTIMIZE_CXXFLAGS)
727
c3be340e 728 WARN_FLAGS="-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2"
ff66d28f
PE		 729 AC_SUBST(WARN_FLAGS)
730])
731
732
733dnl
734dnl All installation directory information is determined here.
735dnl
736dnl Substs:
737dnl gxx_install_dir
738dnl glibcxx_prefixdir
739dnl glibcxx_toolexecdir
740dnl glibcxx_toolexeclibdir
741dnl
742dnl Assumes cross_compiling bits already done, and with_cross_host in
743dnl particular.
744dnl
0f57bf40 745dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
505692b0 746dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
f214923c 747AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
ff66d28f
PE		 748 glibcxx_toolexecdir=no
749 glibcxx_toolexeclibdir=no
750 glibcxx_prefixdir=$prefix
751
752 AC_MSG_CHECKING([for gxx-include-dir])
753 AC_ARG_WITH([gxx-include-dir],
754 AC_HELP_STRING([--with-gxx-include-dir=DIR],
b329dd10 755 [installation directory for include files]),
ff66d28f
PE		 756 [case "$withval" in
757 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
758 no) gxx_include_dir=no ;;
759 *) gxx_include_dir=$withval ;;
760 esac],
761 [gxx_include_dir=no])
762 AC_MSG_RESULT($gxx_include_dir)
763
764 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
765 AC_ARG_ENABLE([version-specific-runtime-libs],
766 AC_HELP_STRING([--enable-version-specific-runtime-libs],
b329dd10 767 [Specify that runtime libraries should be installed in a compiler-specific directory]),
ff66d28f
PE		 768 [case "$enableval" in
769 yes) version_specific_libs=yes ;;
770 no) version_specific_libs=no ;;
771 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
772 esac],
773 [version_specific_libs=no])
774 AC_MSG_RESULT($version_specific_libs)
775
776 # Default case for install directory for include files.
777 if test $version_specific_libs = no && test $gxx_include_dir = no; then
0f57bf40 778 gxx_include_dir='include/c++/${gcc_version}'
b329dd10
BK		 779 if test -n "$with_cross_host" &&
780 test x"$with_cross_host" != x"no"; then
0f57bf40
MM		 781 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
782 else
783 gxx_include_dir='${prefix}/'"$gxx_include_dir"
784 fi
ff66d28f
PE		 785 fi
786
787 # Version-specific runtime libs processing.
788 if test $version_specific_libs = yes; then
789 # Need the gcc compiler version to know where to install libraries
790 # and header files if --enable-version-specific-runtime-libs option
0314451d
GK		 791 # is selected. FIXME: these variables are misnamed, there are
792 # no executables installed in _toolexecdir or _toolexeclibdir.
ff66d28f 793 if test x"$gxx_include_dir" = x"no"; then
47194af4 794 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
ff66d28f 795 fi
0314451d 796 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
47194af4 797 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
ff66d28f
PE		 798 fi
799
800 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
801 # Install a library built with a cross compiler in tooldir, not libdir.
802 if test x"$glibcxx_toolexecdir" = x"no"; then
803 if test -n "$with_cross_host" &&
804 test x"$with_cross_host" != x"no"; then
fbe057bb
PE		 805 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
806 glibcxx_toolexeclibdir='${toolexecdir}/lib'
ff66d28f 807 else
0314451d 808 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
fbe057bb 809 glibcxx_toolexeclibdir='${libdir}'
ff66d28f 810 fi
fbe057bb 811 multi_os_directory=`$CXX -print-multi-os-directory`
ff66d28f
PE		 812 case $multi_os_directory in
813 .) ;; # Avoid trailing /.
814 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
815 esac
816 fi
817
818 AC_MSG_CHECKING([for install location])
819 AC_MSG_RESULT($gxx_include_dir)
820
821 AC_SUBST(glibcxx_prefixdir)
822 AC_SUBST(gxx_include_dir)
823 AC_SUBST(glibcxx_toolexecdir)
824 AC_SUBST(glibcxx_toolexeclibdir)
825])
826
827
828dnl
829dnl GLIBCXX_ENABLE
830dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
831dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
832dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
833dnl
88b1a025
JW		 834dnl See manual/appendix_porting.html#appendix.porting.build_hacking for
835dnl documentation.
ff66d28f
PE		 836dnl
837m4_define([GLIBCXX_ENABLE],[dnl
838m4_define([_g_switch],[--enable-$1])dnl
b453ace3
AS		 839m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
840 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
ff66d28f
PE		 841 m4_bmatch([$5],
842 [^permit ],
843 [[
844 case "$enableval" in
845 m4_bpatsubst([$5],[permit ])) ;;
846 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
b329dd10
BK		 847 dnl Idea for future: generate a URL pointing to
848 dnl "onlinedocs/configopts.html#whatever"
ff66d28f
PE		 849 esac
850 ]],
851 [^$],
852 [[
853 case "$enableval" in
854 yes|no) ;;
855 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
856 esac
857 ]],
858 [[$5]]),
859 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
860m4_undefine([_g_switch])dnl
861m4_undefine([_g_help])dnl
862])
863
864
865dnl
866dnl Check for ISO/IEC 9899:1999 "C99" support.
867dnl
868dnl --enable-c99 defines _GLIBCXX_USE_C99
869dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
870dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
871dnl Where DEFAULT is either `yes' or `no'.
872dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
873dnl
f214923c 874AC_DEFUN([GLIBCXX_ENABLE_C99], [
ff66d28f
PE		 875 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
876
347669a0 877 if test x"$enable_c99" = x"yes"; then
23c64853
JY		 878 AC_LANG_SAVE
879 AC_LANG_CPLUSPLUS
880
881 # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__
882 # undefined may cause fake C99 facilities, like pre-standard snprintf,
883 # to be spuriously enabled.
884 ac_save_CXXFLAGS="$CXXFLAGS"
885 CXXFLAGS="$CXXFLAGS -std=c++98"
886 ac_save_LIBS="$LIBS"
887 ac_save_gcc_no_link="$gcc_no_link"
888
889 if test x$gcc_no_link != xyes; then
890 # Use -fno-exceptions to that the C driver can link these tests without
891 # hitting undefined references to personality routines.
892 CXXFLAGS="$CXXFLAGS -fno-exceptions"
893 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
894 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
895 gcc_no_link=yes
896 ])
897 fi
347669a0 898
23c64853
JY		 899 # Check for the existence of <math.h> functions used if C99 is enabled.
900 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++98])
901 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx98, [
902 GCC_TRY_COMPILE_OR_LINK(
903 [#include <math.h>
904 volatile double d1, d2;
905 volatile int i;],
906 [i = fpclassify(d1);
907 i = isfinite(d1);
908 i = isinf(d1);
909 i = isnan(d1);
910 i = isnormal(d1);
911 i = signbit(d1);
912 i = isgreater(d1, d2);
913 i = isgreaterequal(d1, d2);
914 i = isless(d1, d2);
915 i = islessequal(d1, d2);
916 i = islessgreater(d1, d2);
917 i = islessgreater(d1, d2);
918 i = isunordered(d1, d2);
919 ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no])
920 ])
921 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx98)
922 if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then
923 AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1,
924 [Define if C99 functions or macros in <math.h> should be imported
925 in <cmath> in namespace std for C++98.])
926 fi
ff66d28f 927
23c64853
JY		 928 # Check for the existence of <complex.h> complex math functions.
929 # This is necessary even though libstdc++ uses the builtin versions
930 # of these functions, because if the builtin cannot be used, a reference
931 # to the library function is emitted.
932 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
933 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
934 if test x"$ac_has_complex_h" = x"yes"; then
935 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++98])
936 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx98, [
937 GCC_TRY_COMPILE_OR_LINK(
938 [#include <complex.h>
939 typedef __complex__ float float_type;
940 typedef __complex__ double double_type;
941 typedef __complex__ long double ld_type;
942 volatile float_type tmpf;
943 volatile double_type tmpd;
944 volatile ld_type tmpld;
945 volatile float f;
946 volatile double d;
947 volatile long double ld;],
948 [f = cabsf(tmpf);
949 f = cargf(tmpf);
950 tmpf = ccosf(tmpf);
951 tmpf = ccoshf(tmpf);
952 tmpf = cexpf(tmpf);
953 tmpf = clogf(tmpf);
954 tmpf = csinf(tmpf);
955 tmpf = csinhf(tmpf);
956 tmpf = csqrtf(tmpf);
957 tmpf = ctanf(tmpf);
958 tmpf = ctanhf(tmpf);
959 tmpf = cpowf(tmpf, tmpf);
960 tmpf = cprojf(tmpf);
961 d = cabs(tmpd);
962 d = carg(tmpd);
963 tmpd = ccos(tmpd);
964 tmpd = ccosh(tmpd);
965 tmpd = cexp(tmpd);
966 tmpd = clog(tmpd);
967 tmpd = csin(tmpd);
968 tmpd = csinh(tmpd);
969 tmpd = csqrt(tmpd);
970 tmpd = ctan(tmpd);
971 tmpd = ctanh(tmpd);
972 tmpd = cpow(tmpd, tmpd);
973 tmpd = cproj(tmpd);
974 ld = cabsl(tmpld);
975 ld = cargl(tmpld);
976 tmpld = ccosl(tmpld);
977 tmpld = ccoshl(tmpld);
978 tmpld = cexpl(tmpld);
979 tmpld = clogl(tmpld);
980 tmpld = csinl(tmpld);
981 tmpld = csinhl(tmpld);
982 tmpld = csqrtl(tmpld);
983 tmpld = ctanl(tmpld);
984 tmpld = ctanhl(tmpld);
985 tmpld = cpowl(tmpld, tmpld);
986 tmpld = cprojl(tmpld);
987 ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no])
988 ])
989 fi
990 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx98)
991 if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then
992 AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1,
993 [Define if C99 functions in <complex.h> should be used in
994 <complex> for C++98. Using compiler builtins for these functions
995 requires corresponding C99 library functions to be present.])
996 fi
997
998 # Check for the existence in <stdio.h> of vscanf, et. al.
999 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++98])
1000 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx98, [
1001 GCC_TRY_COMPILE_OR_LINK(
1002 [#include <stdio.h>
1003 #include <stdarg.h>
1004 void foo(char* fmt, ...)
1005 {
1006 va_list args; va_start(args, fmt);
1007 vfscanf(stderr, "%i", args);
1008 vscanf("%i", args);
1009 vsnprintf(fmt, 0, "%i", args);
1010 vsscanf(fmt, "%i", args);
1011 snprintf(fmt, 0, "%i");
1012 }], [],
1013 [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no])
b6f914f6 1014 ])
23c64853
JY		 1015 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx98)
1016 if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then
1017 AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1,
1018 [Define if C99 functions or macros in <stdio.h> should be imported
1019 in <cstdio> in namespace std for C++98.])
1020 fi
b6f914f6 1021
3555173f
JW		 1022 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1023 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++98])
1024 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx98, [
1025 GCC_TRY_COMPILE_OR_LINK(
1026 [#include <stdlib.h>
1027 volatile float f;
1028 volatile long double ld;
1029 volatile unsigned long long ll;
1030 lldiv_t mydivt;],
1031 [char* tmp;
1032 f = strtof("gnu", &tmp);
1033 ld = strtold("gnu", &tmp);
1034 ll = strtoll("gnu", &tmp, 10);
1035 ll = strtoull("gnu", &tmp, 10);
1036 ll = llabs(10);
1037 mydivt = lldiv(10,1);
1038 ll = mydivt.quot;
1039 ll = mydivt.rem;
1040 ll = atoll("10");
1041 _Exit(0);
1042 ], [glibcxx_cv_c99_stdlib_cxx98=yes], [glibcxx_cv_c99_stdlib_cxx98=no])
1043 ])
1044 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx98)
1045 if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then
1046 AC_DEFINE(_GLIBCXX98_USE_C99_STDLIB, 1,
1047 [Define if C99 functions or macros in <stdlib.h> should be imported
1048 in <cstdlib> in namespace std for C++98.])
1049 fi
1050
23c64853
JY		 1051 # Check for the existence in <wchar.h> of wcstold, etc.
1052 if test x"$ac_has_wchar_h" = xyes &&
1053 test x"$ac_has_wctype_h" = xyes; then
1054 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++98])
1055 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx98, [
1056 AC_TRY_COMPILE([#include <wchar.h>
1057 namespace test
1058 {
1059 using ::wcstold;
1060 using ::wcstoll;
1061 using ::wcstoull;
1062 }
1063 ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no])
1064 ])
1065
1066 # Checks for wide character functions that may not be present.
1067 # Injection of these is wrapped with guard macros.
1068 # NB: only put functions here, instead of immediately above, if
1069 # absolutely necessary.
1070 AC_TRY_COMPILE([#include <wchar.h>
1071 namespace test { using ::vfwscanf; }], [],
1072 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1073
1074 AC_TRY_COMPILE([#include <wchar.h>
1075 namespace test { using ::vswscanf; }], [],
1076 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1077
1078 AC_TRY_COMPILE([#include <wchar.h>
1079 namespace test { using ::vwscanf; }], [],
1080 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1081
1082 AC_TRY_COMPILE([#include <wchar.h>
1083 namespace test { using ::wcstof; }], [],
1084 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1085
1086 AC_TRY_COMPILE([#include <wctype.h>],
1087 [wint_t t; int i = iswblank(t);],
1088 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1089
1090 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx98)
1091 if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then
1092 AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1,
1093 [Define if C99 functions or macros in <wchar.h> should be imported
1094 in <cwchar> in namespace std for C++98.])
1095 fi
1096 fi
517da0ce 1097
23c64853
JY		 1098 # Option parsed, now set things appropriately.
1099 if test x"$glibcxx_cv_c99_math_cxx98" = x"no" ||
1100 test x"$glibcxx_cv_c99_complex_cxx98" = x"no" ||
1101 test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" ||
1102 test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" ||
1103 test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then
1104 enable_c99=no;
1105 else
1106 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1107 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1108 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1109 fi
52e6723c 1110
23c64853
JY		 1111 gcc_no_link="$ac_save_gcc_no_link"
1112 LIBS="$ac_save_LIBS"
1113 CXXFLAGS="$ac_save_CXXFLAGS"
1114 AC_LANG_RESTORE
1115
1116 AC_LANG_SAVE
1117 AC_LANG_CPLUSPLUS
1118
1119 # Use -std=c++11 and test again for C99 library feature in C++11 mode.
1120 # For the reasons given above we use -std=c++11 not -std=gnu++11.
1121 ac_save_CXXFLAGS="$CXXFLAGS"
1122 CXXFLAGS="$CXXFLAGS -std=c++11"
1123 ac_save_LIBS="$LIBS"
1124 ac_save_gcc_no_link="$gcc_no_link"
1125
1126 if test x$gcc_no_link != xyes; then
1127 # Use -fno-exceptions to that the C driver can link these tests without
1128 # hitting undefined references to personality routines.
1129 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1130 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
1131 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
1132 gcc_no_link=yes
1133 ])
1134 fi
ff66d28f 1135
23c64853
JY		 1136 # Check for the existence of <math.h> functions used if C99 is enabled.
1137 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++11])
1138 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx11, [
1139 GCC_TRY_COMPILE_OR_LINK(
1140 [#include <math.h>
1141 volatile double d1, d2;
1142 volatile int i;],
1143 [i = fpclassify(d1);
1144 i = isfinite(d1);
1145 i = isinf(d1);
1146 i = isnan(d1);
1147 i = isnormal(d1);
1148 i = signbit(d1);
1149 i = isgreater(d1, d2);
1150 i = isgreaterequal(d1, d2);
1151 i = isless(d1, d2);
1152 i = islessequal(d1, d2);
1153 i = islessgreater(d1, d2);
1154 i = islessgreater(d1, d2);
1155 i = isunordered(d1, d2);
1156 ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no])
1157 ])
1158 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx11)
1159 if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then
1160 AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1,
1161 [Define if C99 functions or macros in <math.h> should be imported
1162 in <cmath> in namespace std for C++11.])
1163 fi
ff66d28f 1164
23c64853
JY		 1165 # Check for the existence of <complex.h> complex math functions.
1166 # This is necessary even though libstdc++ uses the builtin versions
1167 # of these functions, because if the builtin cannot be used, a reference
1168 # to the library function is emitted.
1169 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
1170 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1171 if test x"$ac_has_complex_h" = x"yes"; then
1172 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++11])
1173 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx11, [
1174 GCC_TRY_COMPILE_OR_LINK(
1175 [#include <complex.h>
1176 typedef __complex__ float float_type;
1177 typedef __complex__ double double_type;
1178 typedef __complex__ long double ld_type;
1179 volatile float_type tmpf;
1180 volatile double_type tmpd;
1181 volatile ld_type tmpld;
1182 volatile float f;
1183 volatile double d;
1184 volatile long double ld;],
1185 [f = cabsf(tmpf);
1186 f = cargf(tmpf);
1187 tmpf = ccosf(tmpf);
1188 tmpf = ccoshf(tmpf);
1189 tmpf = cexpf(tmpf);
1190 tmpf = clogf(tmpf);
1191 tmpf = csinf(tmpf);
1192 tmpf = csinhf(tmpf);
1193 tmpf = csqrtf(tmpf);
1194 tmpf = ctanf(tmpf);
1195 tmpf = ctanhf(tmpf);
1196 tmpf = cpowf(tmpf, tmpf);
1197 tmpf = cprojf(tmpf);
1198 d = cabs(tmpd);
1199 d = carg(tmpd);
1200 tmpd = ccos(tmpd);
1201 tmpd = ccosh(tmpd);
1202 tmpd = cexp(tmpd);
1203 tmpd = clog(tmpd);
1204 tmpd = csin(tmpd);
1205 tmpd = csinh(tmpd);
1206 tmpd = csqrt(tmpd);
1207 tmpd = ctan(tmpd);
1208 tmpd = ctanh(tmpd);
1209 tmpd = cpow(tmpd, tmpd);
1210 tmpd = cproj(tmpd);
1211 ld = cabsl(tmpld);
1212 ld = cargl(tmpld);
1213 tmpld = ccosl(tmpld);
1214 tmpld = ccoshl(tmpld);
1215 tmpld = cexpl(tmpld);
1216 tmpld = clogl(tmpld);
1217 tmpld = csinl(tmpld);
1218 tmpld = csinhl(tmpld);
1219 tmpld = csqrtl(tmpld);
1220 tmpld = ctanl(tmpld);
1221 tmpld = ctanhl(tmpld);
1222 tmpld = cpowl(tmpld, tmpld);
1223 tmpld = cprojl(tmpld);
1224 ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no])
1225 ])
1226 fi
1227 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx11)
1228 if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then
1229 AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1,
1230 [Define if C99 functions in <complex.h> should be used in
1231 <complex> for C++11. Using compiler builtins for these functions
1232 requires corresponding C99 library functions to be present.])
1233 fi
1234
1235 # Check for the existence in <stdio.h> of vscanf, et. al.
1236 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++11])
1237 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx11, [
1238 GCC_TRY_COMPILE_OR_LINK(
1239 [#include <stdio.h>
1240 #include <stdarg.h>
1241 void foo(char* fmt, ...)
1242 {
1243 va_list args; va_start(args, fmt);
1244 vfscanf(stderr, "%i", args);
1245 vscanf("%i", args);
1246 vsnprintf(fmt, 0, "%i", args);
1247 vsscanf(fmt, "%i", args);
1248 snprintf(fmt, 0, "%i");
1249 }], [],
1250 [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no])
1251 ])
1252 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx11)
1253 if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then
1254 AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1,
1255 [Define if C99 functions or macros in <stdio.h> should be imported
1256 in <cstdio> in namespace std for C++11.])
1257 fi
1258
1259 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1260 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++11])
1261 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx11, [
1262 GCC_TRY_COMPILE_OR_LINK(
1263 [#include <stdlib.h>
1264 volatile float f;
1265 volatile long double ld;
1266 volatile unsigned long long ll;
1267 lldiv_t mydivt;],
1268 [char* tmp;
1269 f = strtof("gnu", &tmp);
1270 ld = strtold("gnu", &tmp);
1271 ll = strtoll("gnu", &tmp, 10);
1272 ll = strtoull("gnu", &tmp, 10);
1273 ll = llabs(10);
1274 mydivt = lldiv(10,1);
1275 ll = mydivt.quot;
1276 ll = mydivt.rem;
1277 ll = atoll("10");
1278 _Exit(0);
1279 ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no])
1280 ])
1281 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx11)
1282 if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then
1283 AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1,
1284 [Define if C99 functions or macros in <stdlib.h> should be imported
1285 in <cstdlib> in namespace std for C++11.])
1286 fi
1287
1288 # Check for the existence in <wchar.h> of wcstold, etc.
1289 if test x"$ac_has_wchar_h" = xyes &&
1290 test x"$ac_has_wctype_h" = xyes; then
1291 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++11])
1292 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx11, [
1293 AC_TRY_COMPILE([#include <wchar.h>
1294 namespace test
1295 {
1296 using ::wcstold;
1297 using ::wcstoll;
1298 using ::wcstoull;
1299 }
1300 ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no])
1301 ])
1302
1303 # Checks for wide character functions that may not be present.
1304 # Injection of these is wrapped with guard macros.
1305 # NB: only put functions here, instead of immediately above, if
1306 # absolutely necessary.
1307 AC_TRY_COMPILE([#include <wchar.h>
1308 namespace test { using ::vfwscanf; }], [],
1309 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1310
1311 AC_TRY_COMPILE([#include <wchar.h>
1312 namespace test { using ::vswscanf; }], [],
1313 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1314
1315 AC_TRY_COMPILE([#include <wchar.h>
1316 namespace test { using ::vwscanf; }], [],
1317 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1318
1319 AC_TRY_COMPILE([#include <wchar.h>
1320 namespace test { using ::wcstof; }], [],
1321 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1322
1323 AC_TRY_COMPILE([#include <wctype.h>],
1324 [wint_t t; int i = iswblank(t);],
1325 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1326
1327 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx11)
1328 if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then
1329 AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1,
1330 [Define if C99 functions or macros in <wchar.h> should be imported
1331 in <cwchar> in namespace std for C++11.])
1332 fi
1333 fi
1334
1335 gcc_no_link="$ac_save_gcc_no_link"
1336 LIBS="$ac_save_LIBS"
1337 CXXFLAGS="$ac_save_CXXFLAGS"
1338 AC_LANG_RESTORE
b329dd10 1339 fi
347669a0
BK		 1340
1341 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1342 AC_MSG_RESULT($enable_c99)
dcfa0bc8
PE		 1343])
1344
1345
15e38d0d 1346dnl
959d14e1 1347dnl Check for clock_gettime, nanosleep and sched_yield, used in the
9ab48d6e
JW		 1348dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1349dnl in the C++11 standard.
15e38d0d 1350dnl
959d14e1
CF		 1351dnl --enable-libstdcxx-time
1352dnl --enable-libstdcxx-time=yes
1353dnl checks for the availability of monotonic and realtime clocks,
9ab48d6e
JW		 1354dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
1355dnl links in the latter.
959d14e1 1356dnl --enable-libstdcxx-time=rt
9ab48d6e 1357dnl also searches (and, if needed, links) librt. Note that this is
88b1a025
JW		 1358dnl not always desirable because, in glibc 2.16 and earlier, for
1359dnl example, in turn it triggers the linking of libpthread too,
1360dnl which activates locking,
6c3385c1 1361dnl a large overhead for single-thread programs.
959d14e1
CF		 1362dnl --enable-libstdcxx-time=no
1363dnl --disable-libstdcxx-time
610870b2
PC		 1364dnl disables the checks completely
1365dnl
0d184995
JH		 1366dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1367dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1368dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1369dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1370dnl
959d14e1 1371AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
610870b2 1372
88b1a025 1373 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
610870b2
PC		 1374 [use KIND for check type],
1375 [permit yes|no|rt])
15e38d0d
CF		 1376
1377 AC_LANG_SAVE
1378 AC_LANG_CPLUSPLUS
1379 ac_save_CXXFLAGS="$CXXFLAGS"
1380 CXXFLAGS="$CXXFLAGS -fno-exceptions"
ec6fa56a
PB		 1381 ac_save_LIBS="$LIBS"
1382
1ac5e52c
MK		 1383 ac_has_clock_monotonic=no
1384 ac_has_clock_realtime=no
88b1a025
JW		 1385 ac_has_nanosleep=no
1386 ac_has_sched_yield=no
1387
1388 if test x"$enable_libstdcxx_time" = x"auto"; then
1389
1390 case "${target_os}" in
1391 cygwin*)
1392 ac_has_nanosleep=yes
1393 ;;
1394 darwin*)
1395 ac_has_nanosleep=yes
1396 ac_has_sched_yield=yes
1397 ;;
1398 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
1399 AC_MSG_CHECKING([for at least GNU libc 2.17])
1400 AC_TRY_COMPILE(
1401 [#include <features.h>],
1402 [
1403 #if ! __GLIBC_PREREQ(2, 17)
1404 #error
1405 #endif
1406 ],
1407 [glibcxx_glibc217=yes], [glibcxx_glibc217=no])
1408 AC_MSG_RESULT($glibcxx_glibc217)
1409
1410 if test x"$glibcxx_glibc217" = x"yes"; then
1411 ac_has_clock_monotonic=yes
1412 ac_has_clock_realtime=yes
1413 fi
1414 ac_has_nanosleep=yes
1415 ac_has_sched_yield=yes
1416 ;;
b76602dc 1417 freebsd*|netbsd*|dragonfly*|rtems*)
88b1a025
JW		 1418 ac_has_clock_monotonic=yes
1419 ac_has_clock_realtime=yes
1420 ac_has_nanosleep=yes
1421 ac_has_sched_yield=yes
1422 ;;
1423 openbsd*)
1424 ac_has_clock_monotonic=yes
1425 ac_has_clock_realtime=yes
1426 ac_has_nanosleep=yes
1427 ;;
1428 solaris*)
1429 GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt"
1430 ac_has_clock_monotonic=yes
1431 ac_has_clock_realtime=yes
1432 ac_has_nanosleep=yes
1433 ac_has_sched_yield=yes
1434 ;;
1435 esac
ec6fa56a 1436
88b1a025 1437 elif test x"$enable_libstdcxx_time" != x"no"; then
ec6fa56a 1438
959d14e1 1439 if test x"$enable_libstdcxx_time" = x"rt"; then
610870b2 1440 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
959d14e1 1441 AC_SEARCH_LIBS(nanosleep, [rt posix4])
610870b2
PC		 1442 else
1443 AC_SEARCH_LIBS(clock_gettime, [posix4])
959d14e1 1444 AC_SEARCH_LIBS(nanosleep, [posix4])
610870b2
PC		 1445 fi
1446
1447 case "$ac_cv_search_clock_gettime" in
1448 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
959d14e1
CF		 1449 ;;
1450 esac
1451 case "$ac_cv_search_nanosleep" in
1452 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1453 ;;
1454 esac
1455
1456 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1457
1458 case "$ac_cv_search_sched_yield" in
1459 -lposix4*)
1460 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
88b1a025 1461 ac_has_sched_yield=yes
959d14e1
CF		 1462 ;;
1463 -lrt*)
1464 if test x"$enable_libstdcxx_time" = x"rt"; then
b329dd10 1465 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
88b1a025 1466 ac_has_sched_yield=yes
959d14e1
CF		 1467 fi
1468 ;;
1469 *)
88b1a025 1470 ac_has_sched_yield=yes
959d14e1 1471 ;;
610870b2
PC		 1472 esac
1473
1474 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1475
1476 if test x"$ac_has_unistd_h" = x"yes"; then
1477 AC_MSG_CHECKING([for monotonic clock])
1478 AC_TRY_LINK(
b329dd10
BK		 1479 [#include <unistd.h>
1480 #include <time.h>
1481 ],
1482 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1483 timespec tp;
1484 #endif
1485 clock_gettime(CLOCK_MONOTONIC, &tp);
1486 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1487
1488 AC_MSG_RESULT($ac_has_clock_monotonic)
1489
610870b2
PC		 1490 AC_MSG_CHECKING([for realtime clock])
1491 AC_TRY_LINK(
b329dd10
BK		 1492 [#include <unistd.h>
1493 #include <time.h>
1494 ],
1495 [#if _POSIX_TIMERS > 0
1496 timespec tp;
1497 #endif
1498 clock_gettime(CLOCK_REALTIME, &tp);
1499 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
610870b2
PC		 1500
1501 AC_MSG_RESULT($ac_has_clock_realtime)
610870b2 1502
959d14e1
CF		 1503 AC_MSG_CHECKING([for nanosleep])
1504 AC_TRY_LINK(
b329dd10
BK		 1505 [#include <unistd.h>
1506 #include <time.h>
1507 ],
1508 [#if _POSIX_TIMERS > 0
1509 timespec tp;
1510 #endif
1511 nanosleep(&tp, 0);
1512 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
959d14e1
CF		 1513
1514 AC_MSG_RESULT($ac_has_nanosleep)
1515 fi
610870b2
PC		 1516 fi
1517
2e8a9734
JJ		 1518 if test x"$ac_has_clock_monotonic" != x"yes"; then
1519 case ${target_os} in
1520 linux*)
1521 AC_MSG_CHECKING([for clock_gettime syscall])
1522 AC_TRY_COMPILE(
1523 [#include <unistd.h>
1524 #include <time.h>
1525 #include <sys/syscall.h>
1526 ],
1527 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1528 timespec tp;
1529 #endif
1530 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
1531 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
1532 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no])
1533 AC_MSG_RESULT($ac_has_clock_monotonic_syscall)
1534 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then
1535 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
1536 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ])
1537 ac_has_clock_monotonic=yes
1538 ac_has_clock_realtime=yes
1539 fi;;
1540 esac
1541 fi
1542
15e38d0d
CF		 1543 if test x"$ac_has_clock_monotonic" = x"yes"; then
1544 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1545 [ Defined if clock_gettime has monotonic clock support. ])
1546 fi
ec6fa56a 1547
15e38d0d
CF		 1548 if test x"$ac_has_clock_realtime" = x"yes"; then
1549 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1550 [ Defined if clock_gettime has realtime clock support. ])
1551 fi
ec6fa56a 1552
88b1a025
JW		 1553 if test x"$ac_has_sched_yield" = x"yes"; then
1554 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1555 [ Defined if sched_yield is available. ])
1556 fi
1557
959d14e1
CF		 1558 if test x"$ac_has_nanosleep" = x"yes"; then
1559 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1560 [ Defined if nanosleep is available. ])
aa66b299
JW		 1561 else
1562 AC_MSG_CHECKING([for sleep])
1563 AC_TRY_COMPILE([#include <unistd.h>],
1564 [sleep(1)],
1565 [ac_has_sleep=yes],[ac_has_sleep=no])
1566 if test x"$ac_has_sleep" = x"yes"; then
1567 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1568 fi
1569 AC_MSG_RESULT($ac_has_sleep)
1570 AC_MSG_CHECKING([for usleep])
1571 AC_TRY_COMPILE([#include <unistd.h>],
1572 [sleep(1);
1573 usleep(100);],
1574 [ac_has_usleep=yes],[ac_has_usleep=no])
1575 if test x"$ac_has_usleep" = x"yes"; then
1576 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1577 fi
1578 AC_MSG_RESULT($ac_has_usleep)
959d14e1
CF		 1579 fi
1580
8ed812cc
JW		 1581 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1582 AC_MSG_CHECKING([for Sleep])
1583 AC_TRY_COMPILE([#include <windows.h>],
1584 [Sleep(1)],
1585 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1586 if test x"$ac_has_win32_sleep" = x"yes"; then
1587 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1588 fi
1589 AC_MSG_RESULT($ac_has_win32_sleep)
1590 fi
1591
ec6fa56a
PB		 1592 AC_SUBST(GLIBCXX_LIBS)
1593
15e38d0d 1594 CXXFLAGS="$ac_save_CXXFLAGS"
ec6fa56a 1595 LIBS="$ac_save_LIBS"
15e38d0d
CF		 1596 AC_LANG_RESTORE
1597])
1598
1599dnl
9ab48d6e
JW		 1600dnl Check for gettimeofday, used in the implementation of 20.11.7
1601dnl [time.clock] in the C++11 standard.
15e38d0d
CF		 1602dnl
1603AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
b329dd10 1604
610870b2
PC		 1605 AC_MSG_CHECKING([for gettimeofday])
1606
15e38d0d
CF		 1607 AC_LANG_SAVE
1608 AC_LANG_CPLUSPLUS
1609 ac_save_CXXFLAGS="$CXXFLAGS"
1610 CXXFLAGS="$CXXFLAGS -fno-exceptions"
b329dd10 1611
15e38d0d
CF		 1612 ac_has_gettimeofday=no;
1613 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1614 if test x"$ac_has_sys_time_h" = x"yes"; then
1615 AC_MSG_CHECKING([for gettimeofday])
610870b2 1616 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
15e38d0d
CF		 1617 [timeval tv; gettimeofday(&tv, 0);],
1618 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
b329dd10 1619
15e38d0d
CF		 1620 AC_MSG_RESULT($ac_has_gettimeofday)
1621 fi
b329dd10 1622
15e38d0d
CF		 1623 if test x"$ac_has_gettimeofday" = x"yes"; then
1624 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1625 [ Defined if gettimeofday is available. ])
1626 fi
b329dd10 1627
15e38d0d
CF		 1628 CXXFLAGS="$ac_save_CXXFLAGS"
1629 AC_LANG_RESTORE
1630])
1631
bd2bb1ea
PC		 1632dnl
1633dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1634dnl facilities in Chapter 8, "C compatibility".
1635dnl
1636AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1637
1638 AC_LANG_SAVE
1639 AC_LANG_CPLUSPLUS
1640
18f310b7
PC		 1641 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1642 # undefined and fake C99 facilities may be spuriously enabled.
1643 ac_save_CXXFLAGS="$CXXFLAGS"
1644 CXXFLAGS="$CXXFLAGS -std=c++98"
1645
bd2bb1ea
PC		 1646 # Check for the existence of <complex.h> complex math functions used
1647 # by tr1/complex.
1648 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1649 ac_c99_complex_tr1=no;
1650 if test x"$ac_has_complex_h" = x"yes"; then
1651 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1652 AC_TRY_COMPILE([#include <complex.h>],
b329dd10
BK		 1653 [typedef __complex__ float float_type; float_type tmpf;
1654 cacosf(tmpf);
1655 casinf(tmpf);
1656 catanf(tmpf);
1657 cacoshf(tmpf);
1658 casinhf(tmpf);
1659 catanhf(tmpf);
bd2bb1ea 1660 typedef __complex__ double double_type; double_type tmpd;
b329dd10
BK		 1661 cacos(tmpd);
1662 casin(tmpd);
1663 catan(tmpd);
1664 cacosh(tmpd);
1665 casinh(tmpd);
1666 catanh(tmpd);
bd2bb1ea 1667 typedef __complex__ long double ld_type; ld_type tmpld;
b329dd10
BK		 1668 cacosl(tmpld);
1669 casinl(tmpld);
1670 catanl(tmpld);
1671 cacoshl(tmpld);
1672 casinhl(tmpld);
1673 catanhl(tmpld);
bd2bb1ea
PC		 1674 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1675 fi
1676 AC_MSG_RESULT($ac_c99_complex_tr1)
1677 if test x"$ac_c99_complex_tr1" = x"yes"; then
1678 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
b329dd10
BK		 1679 [Define if C99 functions in <complex.h> should be used in
1680 <tr1/complex>. Using compiler builtins for these functions
bd2bb1ea
PC		 1681 requires corresponding C99 library functions to be present.])
1682 fi
1683
1684 # Check for the existence of <ctype.h> functions.
1685 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
6d26724a 1686 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
bd2bb1ea 1687 AC_TRY_COMPILE([#include <ctype.h>],
b329dd10
BK		 1688 [int ch;
1689 int ret;
1690 ret = isblank(ch);
0f24e8de
PC		 1691 ],[glibcxx_cv_c99_ctype_tr1=yes],
1692 [glibcxx_cv_c99_ctype_tr1=no])
bd2bb1ea 1693 ])
6d26724a
RW		 1694 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1695 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
bd2bb1ea 1696 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
b329dd10 1697 [Define if C99 functions in <ctype.h> should be imported in
bd2bb1ea
PC		 1698 <tr1/cctype> in namespace std::tr1.])
1699 fi
1700
20921e53
PC		 1701 # Check for the existence of <fenv.h> functions.
1702 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1703 ac_c99_fenv_tr1=no;
1704 if test x"$ac_has_fenv_h" = x"yes"; then
1705 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1706 AC_TRY_COMPILE([#include <fenv.h>],
b329dd10
BK		 1707 [int except, mode;
1708 fexcept_t* pflag;
1709 fenv_t* penv;
1710 int ret;
1711 ret = feclearexcept(except);
1712 ret = fegetexceptflag(pflag, except);
1713 ret = feraiseexcept(except);
1714 ret = fesetexceptflag(pflag, except);
1715 ret = fetestexcept(except);
1716 ret = fegetround();
1717 ret = fesetround(mode);
1718 ret = fegetenv(penv);
1719 ret = feholdexcept(penv);
1720 ret = fesetenv(penv);
1721 ret = feupdateenv(penv);
20921e53
PC		 1722 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1723 fi
1724 AC_MSG_RESULT($ac_c99_fenv_tr1)
1725 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1726 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
b329dd10 1727 [Define if C99 functions in <fenv.h> should be imported in
20921e53
PC		 1728 <tr1/cfenv> in namespace std::tr1.])
1729 fi
1730
2a1d6346
PC		 1731 # Check for the existence of <stdint.h> types.
1732 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
6d26724a 1733 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
5289e808 1734 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
b329dd10
BK		 1735 #define __STDC_CONSTANT_MACROS
1736 #include <stdint.h>],
1737 [typedef int8_t my_int8_t;
5289e808
PC		 1738 my_int8_t i8 = INT8_MIN;
1739 i8 = INT8_MAX;
b329dd10 1740 typedef int16_t my_int16_t;
5289e808
PC		 1741 my_int16_t i16 = INT16_MIN;
1742 i16 = INT16_MAX;
b329dd10 1743 typedef int32_t my_int32_t;
5289e808
PC		 1744 my_int32_t i32 = INT32_MIN;
1745 i32 = INT32_MAX;
b329dd10 1746 typedef int64_t my_int64_t;
5289e808
PC		 1747 my_int64_t i64 = INT64_MIN;
1748 i64 = INT64_MAX;
b329dd10 1749 typedef int_fast8_t my_int_fast8_t;
5289e808
PC		 1750 my_int_fast8_t if8 = INT_FAST8_MIN;
1751 if8 = INT_FAST8_MAX;
b329dd10 1752 typedef int_fast16_t my_int_fast16_t;
5289e808
PC		 1753 my_int_fast16_t if16 = INT_FAST16_MIN;
1754 if16 = INT_FAST16_MAX;
b329dd10 1755 typedef int_fast32_t my_int_fast32_t;
5289e808
PC		 1756 my_int_fast32_t if32 = INT_FAST32_MIN;
1757 if32 = INT_FAST32_MAX;
b329dd10 1758 typedef int_fast64_t my_int_fast64_t;
5289e808
PC		 1759 my_int_fast64_t if64 = INT_FAST64_MIN;
1760 if64 = INT_FAST64_MAX;
b329dd10 1761 typedef int_least8_t my_int_least8_t;
5289e808
PC		 1762 my_int_least8_t il8 = INT_LEAST8_MIN;
1763 il8 = INT_LEAST8_MAX;
b329dd10 1764 typedef int_least16_t my_int_least16_t;
5289e808
PC		 1765 my_int_least16_t il16 = INT_LEAST16_MIN;
1766 il16 = INT_LEAST16_MAX;
b329dd10 1767 typedef int_least32_t my_int_least32_t;
5289e808
PC		 1768 my_int_least32_t il32 = INT_LEAST32_MIN;
1769 il32 = INT_LEAST32_MAX;
b329dd10 1770 typedef int_least64_t my_int_least64_t;
5289e808
PC		 1771 my_int_least64_t il64 = INT_LEAST64_MIN;
1772 il64 = INT_LEAST64_MAX;
2a1d6346 1773 typedef intmax_t my_intmax_t;
5289e808
PC		 1774 my_intmax_t im = INTMAX_MAX;
1775 im = INTMAX_MIN;
2a1d6346 1776 typedef intptr_t my_intptr_t;
5289e808
PC		 1777 my_intptr_t ip = INTPTR_MAX;
1778 ip = INTPTR_MIN;
b329dd10 1779 typedef uint8_t my_uint8_t;
5289e808
PC		 1780 my_uint8_t ui8 = UINT8_MAX;
1781 ui8 = UINT8_MAX;
b329dd10 1782 typedef uint16_t my_uint16_t;
5289e808
PC		 1783 my_uint16_t ui16 = UINT16_MAX;
1784 ui16 = UINT16_MAX;
b329dd10 1785 typedef uint32_t my_uint32_t;
5289e808
PC		 1786 my_uint32_t ui32 = UINT32_MAX;
1787 ui32 = UINT32_MAX;
b329dd10 1788 typedef uint64_t my_uint64_t;
5289e808
PC		 1789 my_uint64_t ui64 = UINT64_MAX;
1790 ui64 = UINT64_MAX;
b329dd10 1791 typedef uint_fast8_t my_uint_fast8_t;
5289e808
PC		 1792 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1793 uif8 = UINT_FAST8_MAX;
b329dd10 1794 typedef uint_fast16_t my_uint_fast16_t;
5289e808
PC		 1795 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1796 uif16 = UINT_FAST16_MAX;
b329dd10 1797 typedef uint_fast32_t my_uint_fast32_t;
5289e808
PC		 1798 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1799 uif32 = UINT_FAST32_MAX;
b329dd10 1800 typedef uint_fast64_t my_uint_fast64_t;
5289e808
PC		 1801 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1802 uif64 = UINT_FAST64_MAX;
b329dd10 1803 typedef uint_least8_t my_uint_least8_t;
5289e808
PC		 1804 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1805 uil8 = UINT_LEAST8_MAX;
b329dd10 1806 typedef uint_least16_t my_uint_least16_t;
5289e808
PC		 1807 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1808 uil16 = UINT_LEAST16_MAX;
b329dd10 1809 typedef uint_least32_t my_uint_least32_t;
5289e808
PC		 1810 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1811 uil32 = UINT_LEAST32_MAX;
b329dd10 1812 typedef uint_least64_t my_uint_least64_t;
5289e808
PC		 1813 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1814 uil64 = UINT_LEAST64_MAX;
2a1d6346 1815 typedef uintmax_t my_uintmax_t;
5289e808
PC		 1816 my_uintmax_t uim = UINTMAX_MAX;
1817 uim = UINTMAX_MAX;
2a1d6346 1818 typedef uintptr_t my_uintptr_t;
5289e808
PC		 1819 my_uintptr_t uip = UINTPTR_MAX;
1820 uip = UINTPTR_MAX;
0f24e8de
PC		 1821 ],[glibcxx_cv_c99_stdint_tr1=yes],
1822 [glibcxx_cv_c99_stdint_tr1=no])
2a1d6346 1823 ])
6d26724a
RW		 1824 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1825 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
2a1d6346 1826 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
b329dd10 1827 [Define if C99 types in <stdint.h> should be imported in
2a1d6346
PC		 1828 <tr1/cstdint> in namespace std::tr1.])
1829 fi
1830
4f0de5dd
PC		 1831 # Check for the existence of <math.h> functions.
1832 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
6d26724a 1833 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
4f0de5dd 1834 AC_TRY_COMPILE([#include <math.h>],
b329dd10
BK		 1835 [typedef double_t my_double_t;
1836 typedef float_t my_float_t;
1837 acosh(0.0);
1838 acoshf(0.0f);
1839 acoshl(0.0l);
1840 asinh(0.0);
1841 asinhf(0.0f);
1842 asinhl(0.0l);
1843 atanh(0.0);
1844 atanhf(0.0f);
1845 atanhl(0.0l);
1846 cbrt(0.0);
1847 cbrtf(0.0f);
1848 cbrtl(0.0l);
1849 copysign(0.0, 0.0);
1850 copysignf(0.0f, 0.0f);
1851 copysignl(0.0l, 0.0l);
1852 erf(0.0);
1853 erff(0.0f);
1854 erfl(0.0l);
1855 erfc(0.0);
1856 erfcf(0.0f);
1857 erfcl(0.0l);
1858 exp2(0.0);
1859 exp2f(0.0f);
1860 exp2l(0.0l);
1861 expm1(0.0);
1862 expm1f(0.0f);
1863 expm1l(0.0l);
1864 fdim(0.0, 0.0);
1865 fdimf(0.0f, 0.0f);
1866 fdiml(0.0l, 0.0l);
1867 fma(0.0, 0.0, 0.0);
1868 fmaf(0.0f, 0.0f, 0.0f);
1869 fmal(0.0l, 0.0l, 0.0l);
1870 fmax(0.0, 0.0);
1871 fmaxf(0.0f, 0.0f);
1872 fmaxl(0.0l, 0.0l);
1873 fmin(0.0, 0.0);
1874 fminf(0.0f, 0.0f);
1875 fminl(0.0l, 0.0l);
1876 hypot(0.0, 0.0);
1877 hypotf(0.0f, 0.0f);
1878 hypotl(0.0l, 0.0l);
1879 ilogb(0.0);
1880 ilogbf(0.0f);
1881 ilogbl(0.0l);
1882 lgamma(0.0);
1883 lgammaf(0.0f);
1884 lgammal(0.0l);
a7765de8 1885 #ifndef __APPLE__ /* see below */
b329dd10
BK		 1886 llrint(0.0);
1887 llrintf(0.0f);
1888 llrintl(0.0l);
1889 llround(0.0);
1890 llroundf(0.0f);
1891 llroundl(0.0l);
a7765de8 1892 #endif
b329dd10
BK		 1893 log1p(0.0);
1894 log1pf(0.0f);
1895 log1pl(0.0l);
1896 log2(0.0);
1897 log2f(0.0f);
1898 log2l(0.0l);
1899 logb(0.0);
1900 logbf(0.0f);
1901 logbl(0.0l);
1902 lrint(0.0);
1903 lrintf(0.0f);
1904 lrintl(0.0l);
1905 lround(0.0);
1906 lroundf(0.0f);
1907 lroundl(0.0l);
1908 nan(0);
1909 nanf(0);
1910 nanl(0);
1911 nearbyint(0.0);
1912 nearbyintf(0.0f);
1913 nearbyintl(0.0l);
1914 nextafter(0.0, 0.0);
1915 nextafterf(0.0f, 0.0f);
1916 nextafterl(0.0l, 0.0l);
1917 nexttoward(0.0, 0.0);
1918 nexttowardf(0.0f, 0.0f);
1919 nexttowardl(0.0l, 0.0l);
1920 remainder(0.0, 0.0);
1921 remainderf(0.0f, 0.0f);
1922 remainderl(0.0l, 0.0l);
1923 remquo(0.0, 0.0, 0);
1924 remquof(0.0f, 0.0f, 0);
1925 remquol(0.0l, 0.0l, 0);
1926 rint(0.0);
1927 rintf(0.0f);
1928 rintl(0.0l);
1929 round(0.0);
1930 roundf(0.0f);
1931 roundl(0.0l);
1932 scalbln(0.0, 0l);
1933 scalblnf(0.0f, 0l);
1934 scalblnl(0.0l, 0l);
1935 scalbn(0.0, 0);
1936 scalbnf(0.0f, 0);
1937 scalbnl(0.0l, 0);
1938 tgamma(0.0);
1939 tgammaf(0.0f);
1940 tgammal(0.0l);
1941 trunc(0.0);
1942 truncf(0.0f);
1943 truncl(0.0l);
6d26724a 1944 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
4f0de5dd 1945 ])
6d26724a
RW		 1946 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1947 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
4f0de5dd 1948 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
b329dd10
BK		 1949 [Define if C99 functions or macros in <math.h> should be imported
1950 in <tr1/cmath> in namespace std::tr1.])
a7765de8
JW		 1951
1952 case "${target_os}" in
1953 darwin*)
1954 AC_MSG_CHECKING([for ISO C99 rounding functions in <math.h>])
1955 AC_CACHE_VAL(glibcxx_cv_c99_math_llround, [
1956 AC_TRY_COMPILE([#include <math.h>],
1957 [llrint(0.0);
1958 llrintf(0.0f);
1959 llrintl(0.0l);
1960 llround(0.0);
1961 llroundf(0.0f);
1962 llroundl(0.0l);
1963 ],
1964 [glibcxx_cv_c99_math_llround=yes],
1965 [glibcxx_cv_c99_math_llround=no])
1966 ])
1967 AC_MSG_RESULT($glibcxx_cv_c99_math_llround)
1968 ;;
1969 esac
1970 if test x"$glibcxx_cv_c99_math_llround" = x"no"; then
1971 AC_DEFINE(_GLIBCXX_NO_C99_ROUNDING_FUNCS, 1,
1972 [Define if C99 llrint and llround functions are missing from <math.h>.])
1973 fi
4f0de5dd
PC		 1974 fi
1975
03bf3bc1 1976 # Check for the existence of <inttypes.h> functions (NB: doesn't make
a834e097 1977 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
03bf3bc1 1978 ac_c99_inttypes_tr1=no;
6d26724a 1979 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
03bf3bc1
PC		 1980 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1981 AC_TRY_COMPILE([#include <inttypes.h>],
b329dd10
BK		 1982 [intmax_t i, numer, denom, base;
1983 const char* s;
1984 char** endptr;
1985 intmax_t ret = imaxabs(i);
1986 imaxdiv_t dret = imaxdiv(numer, denom);
1987 ret = strtoimax(s, endptr, base);
1988 uintmax_t uret = strtoumax(s, endptr, base);
1989 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
03bf3bc1 1990 fi
52a64bd3
PC		 1991 AC_MSG_RESULT($ac_c99_inttypes_tr1)
1992 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
1993 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
b329dd10
BK		 1994 [Define if C99 functions in <inttypes.h> should be imported in
1995 <tr1/cinttypes> in namespace std::tr1.])
52a64bd3
PC		 1996 fi
1997
bb93f35d 1998 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
a834e097
PC		 1999 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
2000 ac_c99_inttypes_wchar_t_tr1=no;
2001 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
2002 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
2003 AC_TRY_COMPILE([#include <inttypes.h>],
b329dd10 2004 [intmax_t base;
a834e097 2005 const wchar_t* s;
b329dd10
BK		 2006 wchar_t** endptr;
2007 intmax_t ret = wcstoimax(s, endptr, base);
2008 uintmax_t uret = wcstoumax(s, endptr, base);
2009 ],[ac_c99_inttypes_wchar_t_tr1=yes],
a834e097
PC		 2010 [ac_c99_inttypes_wchar_t_tr1=no])
2011 fi
2012 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
2013 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
2014 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
b329dd10 2015 [Define if wchar_t C99 functions in <inttypes.h> should be
a834e097
PC		 2016 imported in <tr1/cinttypes> in namespace std::tr1.])
2017 fi
2018
b329dd10 2019 # Check for the existence of the <stdbool.h> header.
1e41a98c
PC		 2020 AC_CHECK_HEADERS(stdbool.h)
2021
e0f0ee74
JW		 2022 # Check for the existence of the <stdalign.h> header.
2023 AC_CHECK_HEADERS(stdalign.h)
2024
18f310b7 2025 CXXFLAGS="$ac_save_CXXFLAGS"
bd2bb1ea
PC		 2026 AC_LANG_RESTORE
2027])
2028
20b5f0b3
ESR		 2029dnl
2030dnl Check for uchar.h and usability.
2031dnl
2032AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [
2033
2034 # Test uchar.h.
2035 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no)
2036
2037 AC_LANG_SAVE
2038 AC_LANG_CPLUSPLUS
2039 ac_save_CXXFLAGS="$CXXFLAGS"
2040 CXXFLAGS="$CXXFLAGS -std=c++11"
2041
2042 if test x"$ac_has_uchar_h" = x"yes"; then
2043 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>])
2044 AC_TRY_COMPILE([#include <uchar.h>
2045 #ifdef __STDC_UTF_16__
2046 long i = __STDC_UTF_16__;
2047 #endif
2048 #ifdef __STDC_UTF_32__
2049 long j = __STDC_UTF_32__;
2050 #endif
2051 namespace test
2052 {
2053 using ::c16rtomb;
2054 using ::c32rtomb;
2055 using ::mbrtoc16;
2056 using ::mbrtoc32;
2057 }
2058 ],
2059 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no])
2060 else
2061 ac_c11_uchar_cxx11=no
2062 fi
2063 AC_MSG_RESULT($ac_c11_uchar_cxx11)
2064 if test x"$ac_c11_uchar_cxx11" = x"yes"; then
2065 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1,
2066 [Define if C11 functions in <uchar.h> should be imported into
2067 namespace std in <cuchar>.])
2068 fi
2069
2070 CXXFLAGS="$ac_save_CXXFLAGS"
2071 AC_LANG_RESTORE
2072])
2073
2074
d8bc9819 2075dnl
9ce0a22e 2076dnl Check whether "/dev/random" and "/dev/urandom" are available for the
d8bc9819
PC		 2077dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
2078dnl
2079AC_DEFUN([GLIBCXX_CHECK_RANDOM_TR1], [
2080
9ce0a22e 2081 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for TR1 random_device])
6d26724a 2082 AC_CACHE_VAL(glibcxx_cv_random_tr1, [
9ce0a22e 2083 if test -r /dev/random && test -r /dev/urandom; then
cf2f3b1b
KT		 2084 ## For MSys environment the test above is detect as false-positive
2085 ## on mingw-targets. So disable it explicit for them.
2086 case ${target_os} in
2087 *mingw*) glibcxx_cv_random_tr1=no ;;
2088 *) glibcxx_cv_random_tr1=yes ;;
2089 esac
9ce0a22e
PC		 2090 else
2091 glibcxx_cv_random_tr1=no;
2092 fi
d8bc9819 2093 ])
6d26724a 2094 AC_MSG_RESULT($glibcxx_cv_random_tr1)
9ce0a22e 2095
6d26724a 2096 if test x"$glibcxx_cv_random_tr1" = x"yes"; then
d8bc9819 2097 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
b329dd10 2098 [Define if /dev/random and /dev/urandom are available for
d8bc9819
PC		 2099 the random_device of TR1 (Chapter 5.1).])
2100 fi
2101
2102])
bd2bb1ea 2103
1814157e 2104dnl
ddc9c40d
PC		 2105dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
2106dnl
2107AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
2108
9b04fa91 2109 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
ddc9c40d 2110 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
b329dd10
BK		 2111 [#include <stdio.h>],
2112 [AC_MSG_ERROR([computing EOF failed])])
ddc9c40d 2113 ])
ddc9c40d 2114 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
b329dd10 2115 [Define to the value of the EOF integer constant.])
ddc9c40d 2116
9b04fa91 2117 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
ddc9c40d 2118 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
b329dd10
BK		 2119 [#include <stdio.h>],
2120 [AC_MSG_ERROR([computing SEEK_CUR failed])])
ddc9c40d 2121 ])
ddc9c40d 2122 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
b329dd10 2123 [Define to the value of the SEEK_CUR integer constant.])
ddc9c40d 2124
9b04fa91 2125 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
ddc9c40d 2126 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
b329dd10
BK		 2127 [#include <stdio.h>],
2128 [AC_MSG_ERROR([computing SEEK_END failed])])
ddc9c40d 2129 ])
ddc9c40d 2130 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
b329dd10 2131 [Define to the value of the SEEK_END integer constant.])
1814157e
PC		 2132])
2133
1b6ce36f
BK		 2134dnl
2135dnl Check whether required C++ overloads are present in <stdio.h>.
2136dnl
2137AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
2138
2139 AC_LANG_SAVE
2140 AC_LANG_CPLUSPLUS
36105dbd
JW		 2141 # Use C++11 because a conforming <stdio.h> won't define gets for C++14,
2142 # and we don't need a declaration for C++14 anyway.
2143 ac_save_CXXFLAGS="$CXXFLAGS"
2144 CXXFLAGS="$CXXFLAGS -std=gnu++11"
1b6ce36f
BK		 2145
2146 AC_MSG_CHECKING([for gets declaration])
2147 AC_CACHE_VAL(glibcxx_cv_gets, [
2148 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2149 [#include <stdio.h>
2150 namespace test
2151 {
2152 using ::gets;
2153 }
2154 ])],
2155 [glibcxx_cv_gets=yes],
2156 [glibcxx_cv_gets=no]
2157 )])
2158
2159 if test $glibcxx_cv_gets = yes; then
36105dbd 2160 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.])
1b6ce36f
BK		 2161 fi
2162 AC_MSG_RESULT($glibcxx_cv_gets)
2163
36105dbd 2164 CXXFLAGS="$ac_save_CXXFLAGS"
1b6ce36f
BK		 2165 AC_LANG_RESTORE
2166])
2167
ef3a7506 2168dnl
3115f94f
RO		 2169dnl Check whether required C++11 overloads for floating point and integral
2170dnl types are present in <math.h>.
ef3a7506
RO		 2171dnl
2172AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
2173
2174 AC_LANG_SAVE
2175 AC_LANG_CPLUSPLUS
2176 ac_save_CXXFLAGS="$CXXFLAGS"
2177 CXXFLAGS="$CXXFLAGS -std=c++11"
2178
2179 case "$host" in
2180 *-*-solaris2.*)
3115f94f
RO		 2181 # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch
2182 # 11996[67]-02 introduced the C++11 <math.h> floating point overloads.
2183 AC_MSG_CHECKING([for C++11 <math.h> floating point overloads])
2184 AC_CACHE_VAL(glibcxx_cv_math11_fp_overload, [
ef3a7506
RO		 2185 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2186 [#include <math.h>
2187 #undef isfinite
2188 namespace std {
2189 inline bool isfinite(float __x)
2190 { return __builtin_isfinite(__x); }
2191 }
2192 ])],
3115f94f
RO		 2193 [glibcxx_cv_math11_fp_overload=no],
2194 [glibcxx_cv_math11_fp_overload=yes]
ef3a7506
RO		 2195 )])
2196
2197 # autoheader cannot handle indented templates.
3115f94f
RO		 2198 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP],
2199 [/* Define if all C++11 floating point overloads are available in <math.h>. */
ef3a7506 2200#if __cplusplus >= 201103L
3115f94f 2201#undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP
ef3a7506
RO		 2202#endif])
2203
3115f94f
RO		 2204 if test $glibcxx_cv_math11_fp_overload = yes; then
2205 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP)
ef3a7506 2206 fi
3115f94f
RO		 2207 AC_MSG_RESULT([$glibcxx_cv_math11_fp_overload])
2208
2209 # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch
2210 # 11996[67]-02 introduced the C++11 <math.h> integral type overloads.
2211 AC_MSG_CHECKING([for C++11 <math.h> integral type overloads])
2212 AC_CACHE_VAL(glibcxx_cv_math11_int_overload, [
2213 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2214 [#include <math.h>
2215 namespace std {
2216 template<typename _Tp>
2217 struct __is_integer;
2218 template<>
2219 struct __is_integer<int>
2220 {
2221 enum { __value = 1 };
2222 };
2223 }
2224 namespace __gnu_cxx {
2225 template<bool, typename>
2226 struct __enable_if;
2227 template<typename _Tp>
2228 struct __enable_if<true, _Tp>
2229 { typedef _Tp __type; };
2230 }
2231 namespace std {
2232 template<typename _Tp>
2233 constexpr typename __gnu_cxx::__enable_if
2234 <__is_integer<_Tp>::__value, double>::__type
2235 log2(_Tp __x)
2236 { return __builtin_log2(__x); }
2237 }
2238 int
2239 main (void)
2240 {
2241 int i = 1000;
2242 return std::log2(i);
2243 }
2244 ])],
2245 [glibcxx_cv_math11_int_overload=no],
2246 [glibcxx_cv_math11_int_overload=yes]
2247 )])
2248
2249 # autoheader cannot handle indented templates.
2250 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT],
2251 [/* Define if all C++11 integral type overloads are available in <math.h>. */
2252#if __cplusplus >= 201103L
2253#undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT
2254#endif])
2255
2256 if test $glibcxx_cv_math11_int_overload = yes; then
2257 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT)
2258 fi
2259 AC_MSG_RESULT([$glibcxx_cv_math11_int_overload])
ef3a7506 2260 ;;
cc07da33 2261 *)
39a1d8c8
JW		 2262 # If <math.h> defines the obsolete isinf(double) and isnan(double)
2263 # functions (instead of or as well as the C99 generic macros) then we
2264 # can't define std::isinf(double) and std::isnan(double) in <cmath>
2265 # and must use the ones from <math.h> instead.
69b0daeb
JDA		 2266 AC_MSG_CHECKING([for obsolete isinf function in <math.h>])
2267 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf, [
39a1d8c8 2268 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
cc07da33
JW		 2269 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2270 #include <math.h>
39a1d8c8 2271 #undef isinf
39a1d8c8
JW		 2272 namespace std {
2273 using ::isinf;
2158532f
JW		 2274 bool isinf(float);
2275 bool isinf(long double);
69b0daeb
JDA		 2276 }
2277 using std::isinf;
2278 bool b = isinf(0.0);
2279 ])],
2280 [glibcxx_cv_obsolete_isinf=yes],
2281 [glibcxx_cv_obsolete_isinf=no]
2282 )])
2283 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf])
2284 if test $glibcxx_cv_obsolete_isinf = yes; then
2285 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1,
2286 [Define if <math.h> defines obsolete isinf function.])
2287 fi
2288
2289 AC_MSG_CHECKING([for obsolete isnan function in <math.h>])
2290 AC_CACHE_VAL(glibcxx_cv_obsolete_isnan, [
2291 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
74106ead
GL		 2292 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2293 #include <math.h>
69b0daeb
JDA		 2294 #undef isnan
2295 namespace std {
39a1d8c8
JW		 2296 using ::isnan;
2297 bool isnan(float);
2298 bool isnan(long double);
2299 }
39a1d8c8 2300 using std::isnan;
69b0daeb 2301 bool b = isnan(0.0);
39a1d8c8 2302 ])],
69b0daeb
JDA		 2303 [glibcxx_cv_obsolete_isnan=yes],
2304 [glibcxx_cv_obsolete_isnan=no]
39a1d8c8 2305 )])
69b0daeb
JDA		 2306 AC_MSG_RESULT([$glibcxx_cv_obsolete_isnan])
2307 if test $glibcxx_cv_obsolete_isnan = yes; then
2308 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1,
2309 [Define if <math.h> defines obsolete isnan function.])
39a1d8c8 2310 fi
39a1d8c8 2311 ;;
ef3a7506
RO		 2312 esac
2313
2314 CXXFLAGS="$ac_save_CXXFLAGS"
2315 AC_LANG_RESTORE
2316])
2317
0646d8a3
BK		 2318dnl
2319dnl Check whether macros, etc are present for <system_error>
2320dnl
2321AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
2322
6d26724a
RW		 2323m4_pushdef([n_syserr], [1])dnl
2324m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
70593ad2 2325 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
edf2239b
KT		 2326 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
2327 ECHILD, ENOSPC, EPERM,
2328 ETIMEDOUT, EWOULDBLOCK],
6d26724a
RW		 2329[m4_pushdef([SYSERR], m4_toupper(syserr))dnl
2330AC_MSG_CHECKING([for syserr])
2331AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
2332AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
2333 [int i = syserr;])],
2334 [glibcxx_cv_system_error[]n_syserr=yes],
2335 [glibcxx_cv_system_error[]n_syserr=no])
2336])
2337AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
2338if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
2339 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
2340fi
2341m4_define([n_syserr], m4_incr(n_syserr))dnl
2342m4_popdef([SYSERR])dnl
2343])
2344m4_popdef([n_syserr])dnl
0646d8a3
BK		 2345])
2346
0214010c 2347dnl
ff66d28f
PE		 2348dnl Check for what type of C headers to use.
2349dnl
2350dnl --enable-cheaders= [does stuff].
2351dnl --disable-cheaders [does not do anything, really].
2352dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
af13a7a6 2353dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
ff66d28f 2354dnl
f214923c 2355AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
b453ace3 2356 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
af13a7a6 2357 [construct "C" headers for g++], [permit c|c_std|c_global])
ff66d28f
PE		 2358 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2359
2360 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2361
af13a7a6
BK		 2362 # Allow overrides to configure.host here.
2363 if test $enable_cheaders = c_global; then
2364 c_compatibility=yes
2365 fi
2366
ff66d28f 2367 AC_SUBST(C_INCLUDE_DIR)
92eabea2
PE		 2368 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2369 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
af13a7a6 2370 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
92eabea2 2371 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
ff66d28f
PE		 2372])
2373
2374
0214010c 2375dnl
ff66d28f
PE		 2376dnl Check for which locale library to use. The choice is mapped to
2377dnl a subdirectory of config/locale.
37bc6ca2 2378dnl
ff66d28f 2379dnl Default is generic.
0214010c 2380dnl
f214923c 2381AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
b453ace3 2382 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
ff66d28f 2383 [use MODEL for target locale package],
aeb4926a 2384 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
0258dc3a
BK		 2385
2386 # Deal with gettext issues. Default to not using it (=no) until we detect
2387 # support for it later. Let the user turn it off via --e/d, but let that
2388 # default to on for easier handling.
2389 USE_NLS=no
2390 AC_ARG_ENABLE(nls,
2391 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2392 [],
2393 [enable_nls=yes])
b329dd10 2394
aeb4926a 2395 # Either a known package, or "auto"
ff66d28f
PE		 2396 if test $enable_clocale = no || test $enable_clocale = yes; then
2397 enable_clocale=auto
2398 fi
0214010c
BK		 2399 enable_clocale_flag=$enable_clocale
2400
0258dc3a 2401 # Probe for locale model to use if none specified.
ff66d28f
PE		 2402 # Default to "generic".
2403 if test $enable_clocale_flag = auto; then
7d3998a4
PE		 2404 case ${target_os} in
2405 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
b329dd10
BK		 2406 enable_clocale_flag=gnu
2407 ;;
301d1d00 2408 darwin*)
b329dd10 2409 enable_clocale_flag=darwin
f9686024 2410 ;;
301d1d00 2411 dragonfly* | freebsd*)
dbed5a9b
JM		 2412 enable_clocale_flag=dragonfly
2413 ;;
1f726ff8
MK		 2414 openbsd*)
2415 enable_clocale_flag=newlib
2416 ;;
56deb74c 2417 *)
aeb4926a
YZ		 2418 if test x"$with_newlib" = x"yes"; then
2419 enable_clocale_flag=newlib
2420 else
2421 enable_clocale_flag=generic
2422 fi
b329dd10 2423 ;;
56deb74c
BK		 2424 esac
2425 fi
2426
0258dc3a
BK		 2427 # Sanity check model, and test for special functionality.
2428 if test $enable_clocale_flag = gnu; then
2429 AC_EGREP_CPP([_GLIBCXX_ok], [
2430 #include <features.h>
22b36782 2431 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
0258dc3a
BK		 2432 _GLIBCXX_ok
2433 #endif
2434 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2435
0258dc3a 2436 # Set it to scream when it hurts.
b329dd10 2437 ac_save_CFLAGS="$CFLAGS"
0258dc3a
BK		 2438 CFLAGS="-Wimplicit-function-declaration -Werror"
2439
2440 # Use strxfrm_l if available.
2441 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2442 #include <string.h>
2443 #include <locale.h>],
b329dd10
BK		 2444 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2445 AC_DEFINE(HAVE_STRXFRM_L, 1,
2446 [Define if strxfrm_l is available in <string.h>.]),)
2447
0258dc3a
BK		 2448 # Use strerror_l if available.
2449 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2450 #include <string.h>
2451 #include <locale.h>],
b329dd10
BK		 2452 [__locale_t loc; strerror_l(5, loc);],
2453 AC_DEFINE(HAVE_STRERROR_L, 1,
2454 [Define if strerror_l is available in <string.h>.]),)
0258dc3a
BK		 2455
2456 CFLAGS="$ac_save_CFLAGS"
2457 fi
2458
2459 # Perhaps use strerror_r if available, and strerror_l isn't.
b329dd10 2460 ac_save_CFLAGS="$CFLAGS"
0258dc3a
BK		 2461 CFLAGS="-Wimplicit-function-declaration -Werror"
2462 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2463 #include <string.h>
2464 #include <locale.h>],
b329dd10
BK		 2465 [char s[128]; strerror_r(5, s, 128);],
2466 AC_DEFINE(HAVE_STRERROR_R, 1,
2467 [Define if strerror_r is available in <string.h>.]),)
0258dc3a 2468 CFLAGS="$ac_save_CFLAGS"
501e321e 2469
ff66d28f 2470 # Set configure bits for specified locale package
0258dc3a 2471 AC_MSG_CHECKING([for C locale to use])
ff66d28f
PE		 2472 case ${enable_clocale_flag} in
2473 generic)
33590f13
BK		 2474 AC_MSG_RESULT(generic)
2475
1fa4bed7
BK		 2476 CLOCALE_H=config/locale/generic/c_locale.h
2477 CLOCALE_CC=config/locale/generic/c_locale.cc
38cca750 2478 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1fa4bed7
BK		 2479 CCOLLATE_CC=config/locale/generic/collate_members.cc
2480 CCTYPE_CC=config/locale/generic/ctype_members.cc
2481 CMESSAGES_H=config/locale/generic/messages_members.h
2482 CMESSAGES_CC=config/locale/generic/messages_members.cc
2483 CMONEY_CC=config/locale/generic/monetary_members.cc
2484 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1c26d8fd 2485 CTIME_H=config/locale/generic/time_members.h
1fa4bed7 2486 CTIME_CC=config/locale/generic/time_members.cc
89671b70 2487 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
33590f13 2488 ;;
f9686024 2489 darwin)
301d1d00 2490 AC_MSG_RESULT(darwin)
f9686024
GK		 2491
2492 CLOCALE_H=config/locale/generic/c_locale.h
2493 CLOCALE_CC=config/locale/generic/c_locale.cc
f9686024
GK		 2494 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2495 CCOLLATE_CC=config/locale/generic/collate_members.cc
2496 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2497 CMESSAGES_H=config/locale/generic/messages_members.h
2498 CMESSAGES_CC=config/locale/generic/messages_members.cc
2499 CMONEY_CC=config/locale/generic/monetary_members.cc
2500 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2501 CTIME_H=config/locale/generic/time_members.h
2502 CTIME_CC=config/locale/generic/time_members.cc
2503 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2504 ;;
b329dd10 2505
dbed5a9b 2506 dragonfly)
301d1d00 2507 AC_MSG_RESULT(dragonfly or freebsd)
dbed5a9b 2508
a98e4e62 2509 CLOCALE_H=config/locale/dragonfly/c_locale.h
dbed5a9b 2510 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
a98e4e62
JM		 2511 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2512 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
dbed5a9b
JM		 2513 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2514 CMESSAGES_H=config/locale/generic/messages_members.h
2515 CMESSAGES_CC=config/locale/generic/messages_members.cc
a98e4e62
JM		 2516 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2517 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2518 CTIME_H=config/locale/dragonfly/time_members.h
2519 CTIME_CC=config/locale/dragonfly/time_members.cc
dbed5a9b
JM		 2520 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2521 ;;
2522
ff66d28f 2523 gnu)
0214010c 2524 AC_MSG_RESULT(gnu)
33590f13
BK		 2525
2526 # Declare intention to use gettext, and add support for specific
2527 # languages.
248a9163 2528 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
33590f13 2529 ALL_LINGUAS="de fr"
501e321e 2530
248a9163 2531 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
501e321e
BK		 2532 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2533 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
b329dd10 2534 USE_NLS=yes
501e321e 2535 fi
33590f13
BK		 2536 # Export the build objects.
2537 for ling in $ALL_LINGUAS; do \
b329dd10
BK		 2538 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2539 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
33590f13 2540 done
3d7c150e
BK		 2541 AC_SUBST(glibcxx_MOFILES)
2542 AC_SUBST(glibcxx_POFILES)
33590f13 2543
1fa4bed7
BK		 2544 CLOCALE_H=config/locale/gnu/c_locale.h
2545 CLOCALE_CC=config/locale/gnu/c_locale.cc
38cca750 2546 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
1fa4bed7
BK		 2547 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2548 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2549 CMESSAGES_H=config/locale/gnu/messages_members.h
2550 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2551 CMONEY_CC=config/locale/gnu/monetary_members.cc
2552 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
1c26d8fd 2553 CTIME_H=config/locale/gnu/time_members.h
1fa4bed7 2554 CTIME_CC=config/locale/gnu/time_members.cc
89671b70 2555 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
0214010c 2556 ;;
ff66d28f 2557 ieee_1003.1-2001)
7f78b6ca 2558 AC_MSG_RESULT(IEEE 1003.1)
33590f13 2559
1fa4bed7
BK		 2560 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2561 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
38cca750 2562 CCODECVT_CC=config/locale/generic/codecvt_members.cc
1fa4bed7
BK		 2563 CCOLLATE_CC=config/locale/generic/collate_members.cc
2564 CCTYPE_CC=config/locale/generic/ctype_members.cc
2565 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2566 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2567 CMONEY_CC=config/locale/generic/monetary_members.cc
2568 CNUMERIC_CC=config/locale/generic/numeric_members.cc
1c26d8fd 2569 CTIME_H=config/locale/generic/time_members.h
1fa4bed7 2570 CTIME_CC=config/locale/generic/time_members.cc
89671b70 2571 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
0214010c 2572 ;;
aeb4926a
YZ		 2573 newlib)
2574 AC_MSG_RESULT(newlib)
2575
2576 CLOCALE_H=config/locale/generic/c_locale.h
2577 CLOCALE_CC=config/locale/generic/c_locale.cc
2578 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2579 CCOLLATE_CC=config/locale/generic/collate_members.cc
2580 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2581 CMESSAGES_H=config/locale/generic/messages_members.h
2582 CMESSAGES_CC=config/locale/generic/messages_members.cc
2583 CMONEY_CC=config/locale/generic/monetary_members.cc
2584 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2585 CTIME_H=config/locale/generic/time_members.h
2586 CTIME_CC=config/locale/generic/time_members.cc
2587 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2588 ;;
0214010c
BK		 2589 esac
2590
33590f13
BK		 2591 # This is where the testsuite looks for locale catalogs, using the
2592 # -DLOCALEDIR define during testsuite compilation.
3d7c150e
BK		 2593 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2594 AC_SUBST(glibcxx_localedir)
33590f13 2595
7f78b6ca
PE		 2596 # A standalone libintl (e.g., GNU libintl) may be in use.
2597 if test $USE_NLS = yes; then
c67528fe
PE		 2598 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2599 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2600 fi
2601 if test $USE_NLS = yes; then
b329dd10
BK		 2602 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2603 [Define if NLS translations are to be used.])
7f78b6ca
PE		 2604 fi
2605
4e10943d 2606 AC_SUBST(USE_NLS)
4a9d5109 2607 AC_SUBST(CLOCALE_H)
33590f13 2608 AC_SUBST(CMESSAGES_H)
6aa43d99
BK		 2609 AC_SUBST(CCODECVT_CC)
2610 AC_SUBST(CCOLLATE_CC)
2611 AC_SUBST(CCTYPE_CC)
2612 AC_SUBST(CMESSAGES_CC)
2613 AC_SUBST(CMONEY_CC)
2614 AC_SUBST(CNUMERIC_CC)
1c26d8fd 2615 AC_SUBST(CTIME_H)
6aa43d99
BK		 2616 AC_SUBST(CTIME_CC)
2617 AC_SUBST(CLOCALE_CC)
2618 AC_SUBST(CLOCALE_INTERNAL_H)
0214010c
BK		 2619])
2620
2621
8b0d6051
BK		 2622dnl
2623dnl Check for which std::allocator base class to use. The choice is
2624dnl mapped from a subdirectory of include/ext.
2625dnl
2626dnl Default is new.
2627dnl
2628AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
347669a0 2629 AC_MSG_CHECKING([for std::allocator base class])
b453ace3 2630 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
8b0d6051 2631 [use KIND for target std::allocator base],
29d4adf4 2632 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
7d3998a4 2633
8b0d6051
BK		 2634 # If they didn't use this option switch, or if they specified --enable
2635 # with no specific model, we'll have to look for one. If they
2636 # specified --disable (???), do likewise.
7d3998a4
PE		 2637 if test $enable_libstdcxx_allocator = no ||
2638 test $enable_libstdcxx_allocator = yes;
2639 then
8b0d6051
BK		 2640 enable_libstdcxx_allocator=auto
2641 fi
2642
780028b6
BK		 2643 # Either a known package, or "auto". Auto implies the default choice
2644 # for a particular platform.
8b0d6051
BK		 2645 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2646
2647 # Probe for host-specific support if no specific model is specified.
2648 # Default to "new".
2649 if test $enable_libstdcxx_allocator_flag = auto; then
2650 case ${target_os} in
780028b6 2651 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
b329dd10
BK		 2652 enable_libstdcxx_allocator_flag=new
2653 ;;
8b0d6051 2654 *)
b329dd10
BK		 2655 enable_libstdcxx_allocator_flag=new
2656 ;;
8b0d6051
BK		 2657 esac
2658 fi
2659 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
b329dd10 2660
8b0d6051
BK		 2661
2662 # Set configure bits for specified locale package
2663 case ${enable_libstdcxx_allocator_flag} in
2664 bitmap)
2665 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2666 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2667 ;;
2668 malloc)
2669 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2670 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2671 ;;
2672 mt)
2673 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2674 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2675 ;;
2676 new)
2677 ALLOCATOR_H=config/allocator/new_allocator_base.h
2678 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2679 ;;
29d4adf4
PC		 2680 pool)
2681 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2682 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
b329dd10 2683 ;;
8b0d6051
BK		 2684 esac
2685
a04d5fc9
TR		 2686 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW,
2687 test $enable_libstdcxx_allocator_flag = new)
8b0d6051
BK		 2688 AC_SUBST(ALLOCATOR_H)
2689 AC_SUBST(ALLOCATOR_NAME)
2690])
2691
2692
b2dad0e3 2693dnl
ff66d28f
PE		 2694dnl Check for whether the Boost-derived checks should be turned on.
2695dnl
2696dnl --enable-concept-checks turns them on.
2697dnl --disable-concept-checks leaves them off.
2698dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2699dnl Where DEFAULT is either `yes' or `no'.
2700dnl
f214923c 2701AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
ff66d28f
PE		 2702 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2703 if test $enable_concept_checks = yes; then
4651e622 2704 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
b329dd10 2705 [Define to use concept checking code from the boost libraries.])
ff66d28f
PE		 2706 fi
2707])
2708
ed4f96af
BK		 2709dnl
2710dnl Use extern templates.
2711dnl
2712dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2713dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2714
2715dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2716dnl Where DEFAULT is `yes' or `no'.
2717dnl
2718AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2719
2720 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2721
2722 AC_MSG_CHECKING([for extern template support])
2723 AC_MSG_RESULT([$enable_extern_template])
2724
2725 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2726])
2727
2077db1b
CT		 2728dnl
2729dnl Use vtable verification.
2730dnl
2731dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2732dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2733
2734dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2735dnl Where DEFAULT is `yes' or `no'.
2736dnl
2737AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2738
2739 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2740
2741 AC_MSG_CHECKING([for vtable verify support])
2742 AC_MSG_RESULT([$enable_vtable_verify])
2743
536616b7 2744 vtv_cygmin=no
2077db1b 2745 if test $enable_vtable_verify = yes; then
f7f049fa
CT		 2746 case ${target_os} in
2747 cygwin*|mingw32*)
2748 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
441fb2cd 2749 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
536616b7 2750 vtv_cygmin=yes
f7f049fa 2751 ;;
441fb2cd
CT		 2752 darwin*)
2753 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2754 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2755 ;;
e5ef217c
RO		 2756 solaris2*)
2757 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2758 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2759 ;;
f7f049fa
CT		 2760 *)
2761 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
441fb2cd 2762 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
f7f049fa
CT		 2763 ;;
2764 esac
2077db1b 2765 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
2077db1b
CT		 2766 else
2767 VTV_CXXFLAGS=
2768 VTV_PCH_CXXFLAGS=
2769 VTV_CXXLINKFLAGS=
2770 fi
2771
2772 AC_SUBST(VTV_CXXFLAGS)
2773 AC_SUBST(VTV_PCH_CXXFLAGS)
2774 AC_SUBST(VTV_CXXLINKFLAGS)
536616b7 2775 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
2077db1b
CT		 2776 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2777])
2778
c2ba9709
JS		 2779dnl
2780dnl Check for parallel mode pre-requisites, including OpenMP support.
2781dnl
2782dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2783dnl
2784AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2785
2786 enable_parallel=no;
6995087d 2787
0aec205c
BK		 2788 # See if configured libgomp/omp.h exists. (libgomp may be in
2789 # noconfigdirs but not explicitly disabled.)
aae29963 2790 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
0aec205c
BK		 2791 enable_parallel=yes;
2792 else
aae29963 2793 AC_MSG_NOTICE([target-libgomp not built])
c2ba9709
JS		 2794 fi
2795
2796 AC_MSG_CHECKING([for parallel mode support])
2797 AC_MSG_RESULT([$enable_parallel])
c2ba9709
JS		 2798])
2799
ff66d28f 2800
b2dad0e3 2801dnl
ff66d28f 2802dnl Check for which I/O library to use: stdio, or something specific.
37bc6ca2 2803dnl
ff66d28f 2804dnl Default is stdio.
b2dad0e3 2805dnl
f214923c 2806AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
ff66d28f 2807 AC_MSG_CHECKING([for underlying I/O to use])
b453ace3 2808 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
ff66d28f
PE		 2809 [use target-specific I/O package], [permit stdio])
2810
2811 # Now that libio has been removed, you can have any color you want as long
2812 # as it's black. This is one big no-op until other packages are added, but
2813 # showing the framework never hurts.
2814 case ${enable_cstdio} in
2815 stdio)
33590f13
BK		 2816 CSTDIO_H=config/io/c_io_stdio.h
2817 BASIC_FILE_H=config/io/basic_file_stdio.h
2818 BASIC_FILE_CC=config/io/basic_file_stdio.cc
9717c75c 2819 AC_MSG_RESULT(stdio)
dd75251f 2820 ;;
b2dad0e3 2821 esac
cc5112c9 2822
4a9d5109
SW		 2823 AC_SUBST(CSTDIO_H)
2824 AC_SUBST(BASIC_FILE_H)
6aa43d99 2825 AC_SUBST(BASIC_FILE_CC)
b2dad0e3
BK		 2826])
2827
2828
9e57d5ca 2829dnl
ff66d28f 2830dnl Check for "unusual" flags to pass to the compiler while building.
9e57d5ca 2831dnl
ff66d28f
PE		 2832dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2833dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2834dnl --disable-cxx-flags passes nothing.
2835dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2836dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2837dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2838dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2839dnl If "default flags" is an empty string, the effect is the same
2840dnl as --disable or --enable=no.
44f0760e 2841dnl
f214923c 2842AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
ff66d28f
PE		 2843 AC_MSG_CHECKING([for extra compiler flags for building])
2844 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2845 [pass compiler FLAGS when building library],
2846 [case "x$enable_cxx_flags" in
2847 xno | x) enable_cxx_flags= ;;
2848 x-*) ;;
2849 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2850 esac])
2851
2852 # Run through flags (either default or command-line) and set anything
2853 # extra (e.g., #defines) that must accompany particular g++ options.
2854 if test -n "$enable_cxx_flags"; then
2855 for f in $enable_cxx_flags; do
2856 case "$f" in
b329dd10
BK		 2857 -fhonor-std) ;;
2858 -*) ;;
2859 *) # and we're trying to pass /what/ exactly?
2860 AC_MSG_ERROR([compiler flags start with a -]) ;;
ff66d28f
PE		 2861 esac
2862 done
44f0760e
BK		 2863 fi
2864
ff66d28f
PE		 2865 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2866 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2867 AC_SUBST(EXTRA_CXX_FLAGS)
9e57d5ca
BK		 2868])
2869
ff66d28f 2870
ff66d28f
PE		 2871dnl
2872dnl Check to see if debugging libraries are to be built.
2873dnl
2874dnl --enable-libstdcxx-debug
2875dnl builds a separate set of debugging libraries in addition to the
2876dnl normal (shared, static) libstdc++ binaries.
2877dnl
2878dnl --disable-libstdcxx-debug
2879dnl builds only one (non-debug) version of libstdc++.
2880dnl
2881dnl --enable-libstdcxx-debug-flags=FLAGS
2882dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2883dnl
2884dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2885dnl Where DEFAULT is either `yes' or `no'.
2886dnl
f214923c 2887AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
ff66d28f
PE		 2888 AC_MSG_CHECKING([for additional debug build])
2889 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2890 AC_MSG_RESULT($enable_libstdcxx_debug)
92eabea2 2891 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
b2dad0e3
BK		 2892])
2893
2894
52a11cbf 2895dnl
ff66d28f 2896dnl Check for explicit debug flags.
52a11cbf 2897dnl
ff66d28f
PE		 2898dnl --enable-libstdcxx-debug-flags='-O1'
2899dnl is a general method for passing flags to be used when
38cccb0b 2900dnl building debug libraries with --enable-libstdcxx-debug.
52a11cbf 2901dnl
ff66d28f
PE		 2902dnl --disable-libstdcxx-debug-flags does nothing.
2903dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2904dnl If "default flags" is an empty string, the effect is the same
2905dnl as --disable or --enable=no.
2906dnl
f214923c 2907AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
ff66d28f
PE		 2908 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2909 [pass compiler FLAGS when building debug library],
2910 [case "x$enable_libstdcxx_debug_flags" in
2911 xno | x) enable_libstdcxx_debug_flags= ;;
2912 x-*) ;;
2913 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2914 esac])
2915
2916 # Option parsed, now set things appropriately
2917 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2918 AC_SUBST(DEBUG_FLAGS)
2919
2920 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
52a11cbf
RH		 2921])
2922
2923
92eabea2
PE		 2924dnl
2925dnl Check if the user only wants a freestanding library implementation.
2926dnl
2927dnl --disable-hosted-libstdcxx will turn off most of the library build,
2928dnl installing only the headers required by [17.4.1.3] and the language
2929dnl support library. More than that will be built (to keep the Makefiles
2930dnl conveniently clean), but not installed.
2931dnl
2932dnl Sets:
2933dnl is_hosted (yes/no)
2934dnl
3660e02f
PE		 2935dnl Defines:
2936dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2937dnl
f214923c 2938AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
92eabea2
PE		 2939 AC_ARG_ENABLE([hosted-libstdcxx],
2940 AC_HELP_STRING([--disable-hosted-libstdcxx],
b329dd10 2941 [only build freestanding C++ runtime support]),,
4c24b21a 2942 [case "$host" in
b329dd10 2943 arm*-*-symbianelf*)
4c24b21a
MM		 2944 enable_hosted_libstdcxx=no
2945 ;;
b329dd10 2946 *)
4c24b21a
MM		 2947 enable_hosted_libstdcxx=yes
2948 ;;
2949 esac])
92eabea2
PE		 2950 if test "$enable_hosted_libstdcxx" = no; then
2951 AC_MSG_NOTICE([Only freestanding libraries will be built])
2952 is_hosted=no
3660e02f 2953 hosted_define=0
92eabea2
PE		 2954 enable_abi_check=no
2955 enable_libstdcxx_pch=no
2956 else
2957 is_hosted=yes
3660e02f 2958 hosted_define=1
92eabea2
PE		 2959 fi
2960 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
3660e02f
PE		 2961 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2962 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
92eabea2
PE		 2963])
2964
2965
5a86d36f
SH		 2966dnl
2967dnl Check if the user wants a non-verbose library implementation.
2968dnl
2969dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2970dnl standard error on termination.
2971dnl
2972dnl Defines:
2973dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2974dnl
2975AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2976 AC_ARG_ENABLE([libstdcxx-verbose],
2977 AC_HELP_STRING([--disable-libstdcxx-verbose],
2978 [disable termination messages to standard error]),,
2979 [enable_libstdcxx_verbose=yes])
2980 if test x"$enable_libstdcxx_verbose" = xyes; then
2981 verbose_define=1
2982 else
2983 AC_MSG_NOTICE([verbose termination messages are disabled])
2984 verbose_define=0
2985 fi
2986 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
2987 [Define to 1 if a verbose library is built, or 0 otherwise.])
2988])
2989
2990
6c3a9f72 2991dnl
347669a0 2992dnl Check for template specializations for the 'long long' type.
22248545
PE		 2993dnl The result determines only whether 'long long' I/O is enabled; things
2994dnl like numeric_limits<> specializations are always available.
6c3a9f72 2995dnl
3d7c150e
BK		 2996dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
2997dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
2998dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
ff66d28f 2999dnl Where DEFAULT is either `yes' or `no'.
6c3a9f72 3000dnl
f214923c 3001AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
347669a0 3002 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
ff66d28f 3003 if test $enable_long_long = yes; then
b329dd10
BK		 3004 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
3005 [Define if code specialized for long long should be used.])
6c3a9f72 3006 fi
347669a0
BK		 3007 AC_MSG_CHECKING([for enabled long long specializations])
3008 AC_MSG_RESULT([$enable_long_long])
3009])
3010
3011
4cdc8761
BK		 3012dnl
3013dnl Check for decimal floating point.
3014dnl See:
3015dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
3016dnl
3017dnl This checks to see if the host supports decimal floating point types.
3018dnl
3019dnl Defines:
3020dnl _GLIBCXX_USE_DECIMAL_FLOAT
3021dnl
3022AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
3023
3024 # Fake what AC_TRY_COMPILE does, without linking as this is
3025 # unnecessary for this test.
3026
3027 cat > conftest.$ac_ext << EOF
3028[#]line __oline__ "configure"
3029int main()
3030{
3031 _Decimal32 d1;
3032 _Decimal64 d2;
3033 _Decimal128 d3;
3034 return 0;
3035}
3036EOF
3037
3038 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
3039 if AC_TRY_EVAL(ac_compile); then
3040 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
3041 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
3042 enable_dfp=yes
3043 else
3044 enable_dfp=no
3045 fi
3046 AC_MSG_RESULT($enable_dfp)
3047 rm -f conftest*
3048])
3049
6d585f01
PC		 3050dnl
3051dnl Check for GNU 128-bit integer and floating point types.
3052dnl
3053dnl Note: also checks that the types aren't standard types.
3054dnl
3055dnl Defines:
3056dnl _GLIBCXX_USE_INT128
f421e442 3057dnl ENABLE_FLOAT128
6d585f01
PC		 3058dnl
3059AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
3060
3061 AC_LANG_SAVE
3062 AC_LANG_CPLUSPLUS
3063
3064 # Fake what AC_TRY_COMPILE does, without linking as this is
3065 # unnecessary for this test.
3066
3067 cat > conftest.$ac_ext << EOF
3068[#]line __oline__ "configure"
3069template<typename T1, typename T2>
3070 struct same
3071 { typedef T2 type; };
3072
3073template<typename T>
3074 struct same<T, T>;
3075
3076int main()
3077{
fd1e62c2
PC		 3078 typename same<long, __int128>::type i1;
3079 typename same<long long, __int128>::type i2;
6d585f01
PC		 3080}
3081EOF
3082
fd1e62c2 3083 AC_MSG_CHECKING([for __int128])
6d585f01
PC		 3084 if AC_TRY_EVAL(ac_compile); then
3085 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
fd1e62c2 3086 [Define if __int128 is supported on this host.])
6d585f01
PC		 3087 enable_int128=yes
3088 else
3089 enable_int128=no
3090 fi
3091 AC_MSG_RESULT($enable_int128)
3092 rm -f conftest*
3093
3094 cat > conftest.$ac_ext << EOF
3095[#]line __oline__ "configure"
3096template<typename T1, typename T2>
3097 struct same
3098 { typedef T2 type; };
3099
3100template<typename T>
3101 struct same<T, T>;
3102
3103int main()
3104{
2a5d011c 3105 typename same<double, __float128>::type f1;
6d585f01
PC		 3106 typename same<long double, __float128>::type f2;
3107}
3108EOF
3109
3110 AC_MSG_CHECKING([for __float128])
3111 if AC_TRY_EVAL(ac_compile); then
6d585f01
PC		 3112 enable_float128=yes
3113 else
3114 enable_float128=no
3115 fi
3116 AC_MSG_RESULT($enable_float128)
f421e442 3117 GLIBCXX_CONDITIONAL(ENABLE_FLOAT128, test $enable_float128 = yes)
6d585f01
PC		 3118 rm -f conftest*
3119
3120 AC_LANG_RESTORE
3121])
3122
347669a0
BK		 3123dnl
3124dnl Check for template specializations for the 'wchar_t' type.
3125dnl
3126dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3127dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3128dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3129dnl Where DEFAULT is either `yes' or `no'.
3130dnl
8a9b2875 3131dnl Necessary support must also be present.
347669a0
BK		 3132dnl
3133AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3134 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
8a9b2875
PC		 3135
3136 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3137 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3138 AC_MSG_CHECKING([for mbstate_t])
3139 AC_TRY_COMPILE([#include <wchar.h>],
3140 [mbstate_t teststate;],
3141 have_mbstate_t=yes, have_mbstate_t=no)
3142 AC_MSG_RESULT($have_mbstate_t)
3143 if test x"$have_mbstate_t" = xyes; then
3144 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3145 fi
3146
d814595c
PC		 3147 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3148 # ac_has_wchar_h.
3149 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
b329dd10 3150
8a9b2875
PC		 3151 if test x"$enable_wchar_t" = x"yes"; then
3152
3153 AC_LANG_SAVE
3154 AC_LANG_CPLUSPLUS
b329dd10 3155
8a9b2875
PC		 3156 if test x"$ac_has_wchar_h" = xyes &&
3157 test x"$ac_has_wctype_h" = xyes; then
3158 AC_TRY_COMPILE([#include <wchar.h>
b329dd10
BK		 3159 #include <stddef.h>
3160 wint_t i;
8a9b2875
PC		 3161 long l = WEOF;
3162 long j = WCHAR_MIN;
3163 long k = WCHAR_MAX;
b329dd10
BK		 3164 namespace test
3165 {
8a9b2875
PC		 3166 using ::btowc;
3167 using ::fgetwc;
3168 using ::fgetws;
3169 using ::fputwc;
3170 using ::fputws;
3171 using ::fwide;
b329dd10 3172 using ::fwprintf;
8a9b2875
PC		 3173 using ::fwscanf;
3174 using ::getwc;
3175 using ::getwchar;
b329dd10
BK		 3176 using ::mbrlen;
3177 using ::mbrtowc;
3178 using ::mbsinit;
3179 using ::mbsrtowcs;
8a9b2875
PC		 3180 using ::putwc;
3181 using ::putwchar;
b329dd10
BK		 3182 using ::swprintf;
3183 using ::swscanf;
8a9b2875 3184 using ::ungetwc;
b329dd10
BK		 3185 using ::vfwprintf;
3186 using ::vswprintf;
3187 using ::vwprintf;
3188 using ::wcrtomb;
3189 using ::wcscat;
3190 using ::wcschr;
3191 using ::wcscmp;
3192 using ::wcscoll;
3193 using ::wcscpy;
3194 using ::wcscspn;
3195 using ::wcsftime;
8a9b2875 3196 using ::wcslen;
b329dd10
BK		 3197 using ::wcsncat;
3198 using ::wcsncmp;
3199 using ::wcsncpy;
8a9b2875 3200 using ::wcspbrk;
b329dd10
BK		 3201 using ::wcsrchr;
3202 using ::wcsrtombs;
3203 using ::wcsspn;
8a9b2875 3204 using ::wcsstr;
b329dd10
BK		 3205 using ::wcstod;
3206 using ::wcstok;
8a9b2875 3207 using ::wcstol;
b329dd10
BK		 3208 using ::wcstoul;
3209 using ::wcsxfrm;
3210 using ::wctob;
8a9b2875
PC		 3211 using ::wmemchr;
3212 using ::wmemcmp;
3213 using ::wmemcpy;
3214 using ::wmemmove;
3215 using ::wmemset;
b329dd10
BK		 3216 using ::wprintf;
3217 using ::wscanf;
8a9b2875
PC		 3218 }
3219 ],[],[], [enable_wchar_t=no])
3220 else
3221 enable_wchar_t=no
3222 fi
3223
3224 AC_LANG_RESTORE
3225 fi
3226
3227 if test x"$enable_wchar_t" = x"yes"; then
4651e622 3228 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
b329dd10 3229 [Define if code specialized for wchar_t should be used.])
347669a0 3230 fi
8a9b2875 3231
347669a0
BK		 3232 AC_MSG_CHECKING([for enabled wchar_t specializations])
3233 AC_MSG_RESULT([$enable_wchar_t])
6c3a9f72
BK		 3234])
3235
3236
99246c90 3237dnl
ff66d28f 3238dnl Check to see if building and using a C++ precompiled header can be done.
72ed2836 3239dnl
ff66d28f
PE		 3240dnl --enable-libstdcxx-pch=yes
3241dnl default, this shows intent to use stdc++.h.gch If it looks like it
3242dnl may work, after some light-hearted attempts to puzzle out compiler
3243dnl support, flip bits on in include/Makefile.am
43ba4a58 3244dnl
ff66d28f
PE		 3245dnl --disable-libstdcxx-pch
3246dnl turns off attempts to use or build stdc++.h.gch.
fe413112 3247dnl
ff66d28f
PE		 3248dnl Substs:
3249dnl glibcxx_PCHFLAGS
fe413112 3250dnl
f214923c 3251AC_DEFUN([GLIBCXX_ENABLE_PCH], [
ff66d28f 3252 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
ff66d28f
PE		 3253 if test $enable_libstdcxx_pch = yes; then
3254 AC_CACHE_CHECK([for compiler with PCH support],
3255 [glibcxx_cv_prog_CXX_pch],
3256 [ac_save_CXXFLAGS="$CXXFLAGS"
3257 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3258 AC_LANG_SAVE
3259 AC_LANG_CPLUSPLUS
3260 echo '#include <math.h>' > conftest.h
3261 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
b329dd10
BK		 3262 -o conftest.h.gch 1>&5 2>&1 &&
3263 echo '#error "pch failed"' > conftest.h &&
3264 echo '#include "conftest.h"' > conftest.cc &&
ff66d28f
PE		 3265 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3266 then
b329dd10 3267 glibcxx_cv_prog_CXX_pch=yes
ff66d28f 3268 else
b329dd10 3269 glibcxx_cv_prog_CXX_pch=no
ff66d28f
PE		 3270 fi
3271 rm -f conftest*
3272 CXXFLAGS=$ac_save_CXXFLAGS
3273 AC_LANG_RESTORE
3274 ])
3275 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
c4c064e7 3276 fi
747d0967 3277
797308b2
BK		 3278 AC_MSG_CHECKING([for enabled PCH])
3279 AC_MSG_RESULT([$enable_libstdcxx_pch])
3280
92eabea2 3281 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
ff66d28f 3282 if test $enable_libstdcxx_pch = yes; then
c2ba9709 3283 glibcxx_PCHFLAGS="-include bits/stdc++.h"
c4c064e7 3284 else
ff66d28f 3285 glibcxx_PCHFLAGS=""
bbacb998 3286 fi
ff66d28f 3287 AC_SUBST(glibcxx_PCHFLAGS)
bbacb998
PC		 3288])
3289
7cda84dc 3290
701a3eee
BK		 3291dnl
3292dnl Check for atomic builtins.
3293dnl See:
75cee7c6 3294dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
701a3eee
BK		 3295dnl
3296dnl This checks to see if the host supports the compiler-generated
b329dd10 3297dnl builtins for atomic operations for various integral sizes. Note, this
35648b45
BK		 3298dnl is intended to be an all-or-nothing switch, so all the atomic operations
3299dnl that are used should be checked.
701a3eee
BK		 3300dnl
3301dnl Note:
2cd9cdcc 3302dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
701a3eee 3303dnl
701a3eee 3304AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
701a3eee
BK		 3305 AC_LANG_SAVE
3306 AC_LANG_CPLUSPLUS
35648b45 3307 old_CXXFLAGS="$CXXFLAGS"
2cd9cdcc
PC		 3308
3309 # Do link tests if possible, instead asm tests, limited to some platforms
3310 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3311 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3312 atomic_builtins_link_tests=no
3313 if test x$gcc_no_link != xyes; then
3314 # Can do link tests. Limit to some tested platforms
3315 case "$host" in
3316 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3317 atomic_builtins_link_tests=yes
b329dd10 3318 ;;
2cd9cdcc
PC		 3319 esac
3320 fi
3321
3322 if test x$atomic_builtins_link_tests = xyes; then
3323
3324 # Do link tests.
3325
3326 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3327
3328 AC_MSG_CHECKING([for atomic builtins for bool])
3329 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
3330 AC_TRY_LINK(
3331 [ ],
3332 [typedef bool atomic_type;
3333 atomic_type c1;
3334 atomic_type c2;
75cee7c6 3335 atomic_type c3(0);
d2aee115 3336 // N.B. __atomic_fetch_add is not supported for bool.
75cee7c6 3337 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2a5d011c 3338 __ATOMIC_RELAXED);
75cee7c6
BK		 3339 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3340 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3341 ],
2cd9cdcc
PC		 3342 [glibcxx_cv_atomic_bool=yes],
3343 [glibcxx_cv_atomic_bool=no])
b329dd10 3344 ])
2cd9cdcc
PC		 3345 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3346
3347 AC_MSG_CHECKING([for atomic builtins for short])
3348 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
3349 AC_TRY_LINK(
3350 [ ],
3351 [typedef short atomic_type;
3352 atomic_type c1;
3353 atomic_type c2;
75cee7c6
BK		 3354 atomic_type c3(0);
3355 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3356 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2a5d011c 3357 __ATOMIC_RELAXED);
75cee7c6
BK		 3358 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3359 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3360 ],
2cd9cdcc
PC		 3361 [glibcxx_cv_atomic_short=yes],
3362 [glibcxx_cv_atomic_short=no])
b329dd10 3363 ])
2cd9cdcc
PC		 3364 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3365
3366 AC_MSG_CHECKING([for atomic builtins for int])
3367 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
3368 AC_TRY_LINK(
3369 [ ],
3370 [typedef int atomic_type;
3371 atomic_type c1;
3372 atomic_type c2;
75cee7c6
BK		 3373 atomic_type c3(0);
3374 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3375 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2a5d011c 3376 __ATOMIC_RELAXED);
75cee7c6
BK		 3377 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3378 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3379 ],
2cd9cdcc
PC		 3380 [glibcxx_cv_atomic_int=yes],
3381 [glibcxx_cv_atomic_int=no])
b329dd10 3382 ])
2cd9cdcc
PC		 3383 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3384
3385 AC_MSG_CHECKING([for atomic builtins for long long])
3386 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
3387 AC_TRY_LINK(
3388 [ ],
3389 [typedef long long atomic_type;
3390 atomic_type c1;
3391 atomic_type c2;
75cee7c6
BK		 3392 atomic_type c3(0);
3393 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3394 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2a5d011c 3395 __ATOMIC_RELAXED);
75cee7c6
BK		 3396 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3397 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3398 ],
2cd9cdcc
PC		 3399 [glibcxx_cv_atomic_long_long=yes],
3400 [glibcxx_cv_atomic_long_long=no])
b329dd10 3401 ])
2cd9cdcc
PC		 3402 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3403
3404 else
3405
3406 # Do asm tests.
3407
35648b45
BK		 3408 # Compile unoptimized.
3409 CXXFLAGS='-O0 -S'
3410
2cd9cdcc 3411 # Fake what AC_TRY_COMPILE does.
701a3eee 3412
701a3eee
BK		 3413 cat > conftest.$ac_ext << EOF
3414[#]line __oline__ "configure"
3415int main()
50ce8d3d
BK		 3416{
3417 typedef bool atomic_type;
3418 atomic_type c1;
3419 atomic_type c2;
75cee7c6 3420 atomic_type c3(0);
d2aee115 3421 // N.B. __atomic_fetch_add is not supported for bool.
75cee7c6 3422 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2a5d011c 3423 __ATOMIC_RELAXED);
75cee7c6
BK		 3424 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3425 __atomic_load_n(&c1, __ATOMIC_RELAXED);
2a5d011c 3426
50ce8d3d
BK		 3427 return 0;
3428}
3429EOF
3430
3431 AC_MSG_CHECKING([for atomic builtins for bool])
3432 if AC_TRY_EVAL(ac_compile); then
904bfee8 3433 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
b329dd10 3434 glibcxx_cv_atomic_bool=no
50ce8d3d 3435 else
b329dd10 3436 glibcxx_cv_atomic_bool=yes
50ce8d3d
BK		 3437 fi
3438 fi
2cd9cdcc 3439 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
50ce8d3d
BK		 3440 rm -f conftest*
3441
3442 cat > conftest.$ac_ext << EOF
3443[#]line __oline__ "configure"
3444int main()
3445{
3446 typedef short atomic_type;
3447 atomic_type c1;
3448 atomic_type c2;
75cee7c6
BK		 3449 atomic_type c3(0);
3450 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3451 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2a5d011c 3452 __ATOMIC_RELAXED);
75cee7c6
BK		 3453 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3454 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3455
50ce8d3d
BK		 3456 return 0;
3457}
3458EOF
3459
3460 AC_MSG_CHECKING([for atomic builtins for short])
3461 if AC_TRY_EVAL(ac_compile); then
904bfee8 3462 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
b329dd10 3463 glibcxx_cv_atomic_short=no
50ce8d3d 3464 else
b329dd10 3465 glibcxx_cv_atomic_short=yes
50ce8d3d
BK		 3466 fi
3467 fi
2cd9cdcc 3468 AC_MSG_RESULT($glibcxx_cv_atomic_short)
50ce8d3d
BK		 3469 rm -f conftest*
3470
3471 cat > conftest.$ac_ext << EOF
3472[#]line __oline__ "configure"
3473int main()
701a3eee 3474{
b329dd10 3475 // NB: _Atomic_word not necessarily int.
701a3eee
BK		 3476 typedef int atomic_type;
3477 atomic_type c1;
3478 atomic_type c2;
75cee7c6
BK		 3479 atomic_type c3(0);
3480 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3481 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2a5d011c 3482 __ATOMIC_RELAXED);
75cee7c6
BK		 3483 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3484 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3485
35648b45
BK		 3486 return 0;
3487}
3488EOF
3489
3490 AC_MSG_CHECKING([for atomic builtins for int])
3491 if AC_TRY_EVAL(ac_compile); then
904bfee8 3492 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
b329dd10 3493 glibcxx_cv_atomic_int=no
35648b45 3494 else
b329dd10 3495 glibcxx_cv_atomic_int=yes
35648b45
BK		 3496 fi
3497 fi
2cd9cdcc 3498 AC_MSG_RESULT($glibcxx_cv_atomic_int)
35648b45
BK		 3499 rm -f conftest*
3500
3501 cat > conftest.$ac_ext << EOF
3502[#]line __oline__ "configure"
3503int main()
3504{
50ce8d3d 3505 typedef long long atomic_type;
35648b45
BK		 3506 atomic_type c1;
3507 atomic_type c2;
75cee7c6
BK		 3508 atomic_type c3(0);
3509 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3510 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
2a5d011c 3511 __ATOMIC_RELAXED);
75cee7c6
BK		 3512 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3513 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3514
35648b45 3515 return 0;
701a3eee
BK		 3516}
3517EOF
35648b45 3518
50ce8d3d 3519 AC_MSG_CHECKING([for atomic builtins for long long])
701a3eee 3520 if AC_TRY_EVAL(ac_compile); then
904bfee8 3521 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
b329dd10 3522 glibcxx_cv_atomic_long_long=no
701a3eee 3523 else
b329dd10 3524 glibcxx_cv_atomic_long_long=yes
701a3eee
BK		 3525 fi
3526 fi
2cd9cdcc 3527 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
701a3eee
BK		 3528 rm -f conftest*
3529
2cd9cdcc 3530 fi
50ce8d3d 3531
35648b45
BK		 3532 CXXFLAGS="$old_CXXFLAGS"
3533 AC_LANG_RESTORE
3534
320c7be3
SH		 3535 # Set atomicity_dir to builtins if all but the long long test above passes,
3536 # or if the builtins were already chosen (e.g. by configure.host).
3537 if { test "$glibcxx_cv_atomic_bool" = yes \
3d076231 3538 && test "$glibcxx_cv_atomic_short" = yes \
320c7be3
SH		 3539 && test "$glibcxx_cv_atomic_int" = yes; } \
3540 || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then
a152e96f
BK		 3541 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3542 [Define if the compiler supports C++11 atomics.])
35648b45
BK		 3543 atomicity_dir=cpu/generic/atomicity_builtins
3544 fi
3545
3546 # If still generic, set to mutex.
701a3eee 3547 if test $atomicity_dir = "cpu/generic" ; then
35648b45 3548 atomicity_dir=cpu/generic/atomicity_mutex
6995087d 3549 AC_MSG_WARN([No native atomic operations are provided for this platform.])
dd88bc97 3550 if test "x$target_thread_file" = xsingle; then
b329dd10
BK		 3551 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3552 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
6995087d 3553 else
b329dd10
BK		 3554 AC_MSG_WARN([They will be faked using a mutex.])
3555 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
6995087d 3556 fi
701a3eee 3557 fi
35648b45 3558
701a3eee
BK		 3559])
3560
3561
98e615b4
BK		 3562dnl
3563dnl Allow visibility attributes to be used on namespaces, objects, etc.
3564dnl
dbe17524
PC		 3565dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3566dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3567dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
98e615b4
BK		 3568dnl Where DEFAULT is 'yes'.
3569dnl
dbe17524
PC		 3570AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3571GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
98e615b4 3572
dbe17524 3573if test x$enable_libstdcxx_visibility = xyes ; then
98e615b4
BK		 3574 dnl all hail libgfortran
3575 dnl Check whether the target supports hidden visibility.
3576 AC_CACHE_CHECK([whether the target supports hidden visibility],
6d26724a 3577 glibcxx_cv_have_attribute_visibility, [
98e615b4
BK		 3578 save_CFLAGS="$CFLAGS"
3579 CFLAGS="$CFLAGS -Werror"
3580 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
6d26724a
RW		 3581 [], glibcxx_cv_have_attribute_visibility=yes,
3582 glibcxx_cv_have_attribute_visibility=no)
98e615b4 3583 CFLAGS="$save_CFLAGS"])
6d26724a 3584 if test $glibcxx_cv_have_attribute_visibility = no; then
dbe17524 3585 enable_libstdcxx_visibility=no
98e615b4
BK		 3586 fi
3587fi
3588
dbe17524
PC		 3589GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3590AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
98e615b4
BK		 3591])
3592
3593
530539d9
PE		 3594dnl
3595dnl Add version tags to symbols in shared library (or not), additionally
3596dnl marking other symbols as private/local (or not).
3597dnl
2799d972
BK		 3598dnl Sets libtool_VERSION, and determines shared library SONAME.
3599dnl
3600dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3601dnl
c98b201b
PE		 3602dnl --enable-symvers=style adds a version script to the linker call when
3603dnl creating the shared library. The choice of version script is
3604dnl controlled by 'style'.
530539d9 3605dnl --disable-symvers does not.
2799d972 3606dnl
3d7c150e 3607dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
ff66d28f
PE		 3608dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3609dnl choose a default style based on linker characteristics. Passing
3610dnl 'no' disables versioning.
3611dnl
f214923c 3612AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
ff66d28f 3613
b453ace3 3614GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
ff66d28f 3615 [enables symbol versioning of the shared library],
c18dc5cc 3616 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
c98b201b 3617
3d7c150e 3618# If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
37bc6ca2 3619# don't know enough about $LD to do tricks...
ff66d28f 3620AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
c18dc5cc
RO		 3621# Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3622# with extern "C++" in version scripts.
3623AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
a9fdd472
GK		 3624
3625# Turn a 'yes' into a suitable default.
3626if test x$enable_symvers = xyes ; then
4bd726d0 3627 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
a9fdd472 3628 enable_symvers=no
a9fdd472 3629 else
fb5c309d 3630 if test $with_gnu_ld = yes ; then
d89f0ad6 3631 case ${target_os} in
b329dd10
BK		 3632 hpux*)
3633 enable_symvers=no ;;
3634 *)
3635 enable_symvers=gnu ;;
d89f0ad6 3636 esac
fb5c309d
BK		 3637 else
3638 case ${target_os} in
b329dd10 3639 darwin*)
fb5c309d 3640 enable_symvers=darwin ;;
c18dc5cc
RO		 3641 # Sun symbol versioning exists since Solaris 2.5.
3642 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3643 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3644 # version scripts, so disable symbol versioning if none can be
3645 # found.
3646 if test -z "$ac_cv_path_CXXFILT"; then
3647 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3648 AC_MSG_WARN([=== no GNU c++filt could be found.])
3649 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3650 enable_symvers=no
3651 else
3652 enable_symvers=sun
3653 fi
3654 ;;
b329dd10
BK		 3655 *)
3656 enable_symvers=no ;;
fb5c309d
BK		 3657 esac
3658 fi
a9fdd472 3659 fi
530539d9 3660fi
c98b201b 3661
fb5c309d
BK		 3662# Check to see if 'darwin' or 'darwin-export' can win.
3663if test x$enable_symvers = xdarwin-export ; then
3664 enable_symvers=darwin
3665fi
3666
c18dc5cc
RO		 3667# Check if 'sun' was requested on non-Solaris 2 platforms.
3668if test x$enable_symvers = xsun ; then
3669 case ${target_os} in
3670 solaris2*)
3671 # All fine.
3672 ;;
3673 *)
3674 # Unlikely to work.
3675 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3676 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3677 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3678 enable_symvers=no
3679 ;;
3680 esac
3681fi
3682
f47bddec 3683# Check to see if 'gnu' can win.
b329dd10
BK		 3684if test $enable_symvers = gnu ||
3685 test $enable_symvers = gnu-versioned-namespace ||
c18dc5cc 3686 test $enable_symvers = sun; then
f47bddec 3687 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
2c839a4e
PE		 3688 AC_MSG_CHECKING([for shared libgcc])
3689 ac_save_CFLAGS="$CFLAGS"
3690 CFLAGS=' -lgcc_s'
ff66d28f 3691 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
2c839a4e 3692 CFLAGS="$ac_save_CFLAGS"
d5325238
JJ		 3693 if test $glibcxx_shared_libgcc = no; then
3694 cat > conftest.c <<EOF
3695int main (void) { return 0; }
3696EOF
3697changequote(,)dnl
3698 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3699 -shared -shared-libgcc -o conftest.so \
3700 conftest.c -v 2>&1 >/dev/null \
3701 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3702changequote([,])dnl
3703 rm -f conftest.c conftest.so
3704 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3705 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3706 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3707 CFLAGS="$ac_save_CFLAGS"
3708 fi
3709 fi
3d7c150e 3710 AC_MSG_RESULT($glibcxx_shared_libgcc)
a9fdd472 3711
a9fdd472
GK		 3712 # For GNU ld, we need at least this version. The format is described in
3713 # GLIBCXX_CHECK_LINKER_FEATURES above.
3714 glibcxx_min_gnu_ld_version=21400
c98b201b 3715
f47bddec
GK		 3716 # If no shared libgcc, can't win.
3717 if test $glibcxx_shared_libgcc != yes; then
3718 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3719 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3720 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3721 enable_symvers=no
c18dc5cc
RO		 3722 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3723 : All interesting versions of Sun ld support sun style symbol versioning.
f47bddec 3724 elif test $with_gnu_ld != yes ; then
ab3bc736 3725 # just fail for now
a9fdd472
GK		 3726 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3727 AC_MSG_WARN([=== you are not using the GNU linker.])
3728 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3729 enable_symvers=no
d60a2d4d
ILT		 3730 elif test $glibcxx_ld_is_gold = yes ; then
3731 : All versions of gold support symbol versioning.
a9fdd472
GK		 3732 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3733 # The right tools, the right setup, but too old. Fallbacks?
3734 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3735 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3736 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3737 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
58579a27 3738 AC_MSG_WARN([=== Symbol versioning will be disabled.])
ab3bc736
BK		 3739 enable_symvers=no
3740 fi
3741fi
3742
2799d972 3743# For libtool versioning info, format is CURRENT:REVISION:AGE
cda121ac 3744libtool_VERSION=6:26:0
2799d972
BK		 3745
3746# Everything parsed; figure out what files and settings to use.
c98b201b 3747case $enable_symvers in
ab3bc736 3748 no)
fb5c309d 3749 SYMVER_FILE=config/abi/pre/none.ver
ff66d28f 3750 ;;
c98b201b 3751 gnu)
fb5c309d 3752 SYMVER_FILE=config/abi/pre/gnu.ver
b329dd10
BK		 3753 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3754 [Define to use GNU versioning in the shared library.])
a9fdd472 3755 ;;
3cbc7af0 3756 gnu-versioned-namespace)
87c7063d 3757 libtool_VERSION=8:0:0
3cbc7af0 3758 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
b329dd10
BK		 3759 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3760 [Define to use GNU namespace versioning in the shared library.])
3cbc7af0 3761 ;;
fb5c309d
BK		 3762 darwin)
3763 SYMVER_FILE=config/abi/pre/gnu.ver
b329dd10
BK		 3764 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3765 [Define to use darwin versioning in the shared library.])
ff66d28f 3766 ;;
c18dc5cc
RO		 3767 sun)
3768 SYMVER_FILE=config/abi/pre/gnu.ver
b329dd10
BK		 3769 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3770 [Define to use Sun versioning in the shared library.])
c18dc5cc 3771 ;;
c98b201b
PE		 3772esac
3773
fb5c309d
BK		 3774if test x$enable_symvers != xno ; then
3775 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3776 [Define to use symbol versioning in the shared library.])
3777fi
3778
1f93f687
JJ		 3779AC_CACHE_CHECK([whether the target supports .symver directive],
3780 glibcxx_cv_have_as_symver_directive, [
3781 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3782 [], glibcxx_cv_have_as_symver_directive=yes,
3783 glibcxx_cv_have_as_symver_directive=no)])
3784if test $glibcxx_cv_have_as_symver_directive = yes; then
3785 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3786 [Define to 1 if the target assembler supports .symver directive.])
3787fi
3788
fb5c309d
BK		 3789AC_SUBST(SYMVER_FILE)
3790AC_SUBST(port_specific_symbol_files)
3791GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3792GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
3cbc7af0 3793GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
fb5c309d 3794GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
c18dc5cc 3795GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
fb5c309d
BK		 3796AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3797
c18dc5cc
RO		 3798if test $enable_symvers != no ; then
3799 case ${target_os} in
3800 # The Solaris 2 runtime linker doesn't support the GNU extension of
3801 # binding the same symbol to different versions
3802 solaris2*)
cc2de92d 3803 ;;
c18dc5cc
RO		 3804 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3805 *)
8198d541 3806 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
b329dd10 3807 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
cc2de92d 3808 ;;
c18dc5cc
RO		 3809 esac
3810fi
c18dc5cc 3811
fb5c309d 3812# Now, set up compatibility support, if any.
bb2b2a24
BK		 3813# In addition, need this to deal with std::size_t mangling in
3814# src/compatibility.cc. In a perfect world, could use
3815# typeid(std::size_t).name()[0] to do direct substitution.
3816AC_MSG_CHECKING([for size_t as unsigned int])
3817ac_save_CFLAGS="$CFLAGS"
3818CFLAGS="-Werror"
b329dd10
BK		 3819AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3820 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
bb2b2a24
BK		 3821CFLAGS=$ac_save_CFLAGS
3822if test "$glibcxx_size_t_is_i" = yes; then
3823 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3824fi
3825AC_MSG_RESULT([$glibcxx_size_t_is_i])
3826
3827AC_MSG_CHECKING([for ptrdiff_t as int])
3828ac_save_CFLAGS="$CFLAGS"
3829CFLAGS="-Werror"
b329dd10
BK		 3830AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3831 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
bb2b2a24
BK		 3832CFLAGS=$ac_save_CFLAGS
3833if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3834 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3835fi
3836AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
ff66d28f
PE		 3837])
3838
3839
3840dnl
3841dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3842dnl We must stage the required headers so that they will be installed
3843dnl with the library (unlike libgcc, the STL implementation is provided
3844dnl solely within headers). Since we must not inject random user-space
3845dnl macro names into user-provided C++ code, we first stage into <file>-in
3846dnl and process to <file> with an output command. The reason for a two-
3847dnl stage process here is to correctly handle $srcdir!=$objdir without
3848dnl having to write complex code (the sed commands to clean the macro
3849dnl namespace are complex and fragile enough as it is). We must also
3850dnl add a relative path so that -I- is supported properly.
3851dnl
1183dc2c
PC		 3852dnl Substs:
3853dnl thread_header
3854dnl
f214923c 3855AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
ff66d28f 3856 AC_MSG_CHECKING([for thread model used by GCC])
fbe057bb 3857 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
ff66d28f 3858 AC_MSG_RESULT([$target_thread_file])
1183dc2c 3859 GCC_AC_THREAD_HEADER([$target_thread_file])
ff66d28f
PE		 3860])
3861
3862
b8c41c8e
CF		 3863dnl
3864dnl Check if gthread implementation defines the types and functions
3865dnl required by the c++0x thread library. Conforming gthread
3866dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3867dnl
bae868fb
RO		 3868dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3869dnl
b8c41c8e 3870AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
bae868fb
RO		 3871 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3872
3873 if test x$enable_libstdcxx_threads = xauto ||
3874 test x$enable_libstdcxx_threads = xyes; then
3875
b8c41c8e
CF		 3876 AC_LANG_SAVE
3877 AC_LANG_CPLUSPLUS
3878
3879 ac_save_CXXFLAGS="$CXXFLAGS"
5d1c8e77
RO		 3880 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3881 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
b8c41c8e 3882
3b2eeb43
JW		 3883 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3884 case $target_thread_file in
3885 posix)
3886 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3887 esac
3888
3889 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
6545e33e
PC		 3890
3891 AC_TRY_COMPILE([#include <unistd.h>],
3892 [
3b2eeb43
JW		 3893 // In case of POSIX threads check _POSIX_TIMEOUTS.
3894 #if (defined(_PTHREADS) \
2a5d011c 3895 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
6545e33e
PC		 3896 #error
3897 #endif
3898 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3899
3900 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
2a5d011c 3901 [Define to 1 if mutex_timedlock is available.])
6545e33e
PC		 3902
3903 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3904 else res_mutex_timedlock=no ; fi
3905 AC_MSG_RESULT([$res_mutex_timedlock])
3906
b8c41c8e
CF		 3907 AC_MSG_CHECKING([for gthreads library])
3908
3b2eeb43 3909 AC_TRY_COMPILE([#include "gthr.h"],
b8c41c8e 3910 [
a1c5742d
PC		 3911 #ifndef __GTHREADS_CXX0X
3912 #error
3913 #endif
d9f069ab 3914 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
bae868fb
RO		 3915 else
3916 ac_has_gthreads=no
3917 fi
b8c41c8e
CF		 3918
3919 AC_MSG_RESULT([$ac_has_gthreads])
3920
3921 if test x"$ac_has_gthreads" = x"yes"; then
3922 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
b329dd10 3923 [Define if gthreads library is available.])
5e0216f1
JW		 3924
3925 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
3926 AC_CHECK_TYPE([pthread_rwlock_t],
3927 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
3928 [Define if POSIX read/write locks are available in <gthr.h>.])],
3929 [],
3930 [#include "gthr.h"])
b8c41c8e
CF		 3931 fi
3932
3933 CXXFLAGS="$ac_save_CXXFLAGS"
3934 AC_LANG_RESTORE
3935])
3936
3937
ff66d28f
PE		 3938# Check whether LC_MESSAGES is available in <locale.h>.
3939# Ulrich Drepper <drepper@cygnus.com>, 1995.
3940#
3941# This file file be copied and used freely without restrictions. It can
3942# be used in projects which are not available under the GNU Public License
3943# but which still want to provide support for the GNU gettext functionality.
3944# Please note that the actual code is *not* freely available.
f214923c 3945AC_DEFUN([AC_LC_MESSAGES], [
ff66d28f
PE		 3946 AC_CHECK_HEADER(locale.h, [
3947 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
99bf8d16 3948 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
ff66d28f
PE		 3949 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
3950 if test $ac_cv_val_LC_MESSAGES = yes; then
b329dd10
BK		 3951 AC_DEFINE(HAVE_LC_MESSAGES, 1,
3952 [Define if LC_MESSAGES is available in <locale.h>.])
ff66d28f
PE		 3953 fi
3954 ])
3955])
3956
3ca6351d
UD		 3957dnl
3958dnl Check whether rdrand is supported in the assembler.
3959AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
3960 AC_MSG_CHECKING([for rdrand support in assembler])
bc7e468e 3961 AC_CACHE_VAL(ac_cv_x86_rdrand, [
3ca6351d
UD		 3962 ac_cv_x86_rdrand=no
3963 case "$target" in
3964 i?86-*-* | \
3965 x86_64-*-*)
3966 AC_TRY_COMPILE(, [asm("rdrand %eax");],
3967 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
3968 esac
3969 ])
3970 if test $ac_cv_x86_rdrand = yes; then
3971 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
3972 [ Defined if as can handle rdrand. ])
3973 fi
3974 AC_MSG_RESULT($ac_cv_x86_rdrand)
3975])
3976
43653c33
JW		 3977dnl
3978dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
3979dnl
3980AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
3981
3982 AC_LANG_SAVE
3983 AC_LANG_CPLUSPLUS
3984 ac_save_CXXFLAGS="$CXXFLAGS"
3985 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3986
3987 AC_MSG_CHECKING([for get_nprocs])
3988 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
3989 GCC_TRY_COMPILE_OR_LINK(
3990 [#include <sys/sysinfo.h>],
3991 [int n = get_nprocs();],
3992 [glibcxx_cv_GET_NPROCS=yes],
3993 [glibcxx_cv_GET_NPROCS=no])
3994 ])
3995 if test $glibcxx_cv_GET_NPROCS = yes; then
3996 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
3997 fi
3998 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
3999
4000 CXXFLAGS="$ac_save_CXXFLAGS"
4001 AC_LANG_RESTORE
4002])
4003
4004dnl
4005dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
4006dnl
4007AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
4008
4009 AC_LANG_SAVE
4010 AC_LANG_CPLUSPLUS
4011 ac_save_CXXFLAGS="$CXXFLAGS"
4012 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4013
4014 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
4015 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
4016 GCC_TRY_COMPILE_OR_LINK(
4017 [#include <unistd.h>],
4018 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
4019 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
4020 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
4021 ])
4022 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
4023 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
4024 fi
4025 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
4026
4027 CXXFLAGS="$ac_save_CXXFLAGS"
4028 AC_LANG_RESTORE
4029])
4030
5ee360d0
JW		 4031dnl
4032dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
4033dnl
4034AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
4035
4036 AC_LANG_SAVE
4037 AC_LANG_CPLUSPLUS
4038 ac_save_CXXFLAGS="$CXXFLAGS"
4039 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4040
4041 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
4042 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
4043 GCC_TRY_COMPILE_OR_LINK(
4044 [#include <unistd.h>],
4045 [int n = sysconf(_SC_NPROC_ONLN);],
4046 [glibcxx_cv_SC_NPROC_ONLN=yes],
4047 [glibcxx_cv_SC_NPROC_ONLN=no])
4048 ])
4049 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
4050 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
4051 fi
4052 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
4053
4054 CXXFLAGS="$ac_save_CXXFLAGS"
4055 AC_LANG_RESTORE
4056])
4057
4058dnl
4059dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
4060dnl
4061AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
4062
4063 AC_LANG_SAVE
4064 AC_LANG_CPLUSPLUS
4065 ac_save_CXXFLAGS="$CXXFLAGS"
4066 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4067
4068 AC_MSG_CHECKING([for pthreads_num_processors_np])
4069 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
4070 GCC_TRY_COMPILE_OR_LINK(
4071 [#include <pthread.h>],
4072 [int n = pthread_num_processors_np();],
4073 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
4074 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
4075 ])
4076 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
4077 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
4078 fi
4079 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
4080
4081 CXXFLAGS="$ac_save_CXXFLAGS"
4082 AC_LANG_RESTORE
4083])
4084
4085dnl
4086dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
4087dnl
4088AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
4089
4090 AC_LANG_SAVE
4091 AC_LANG_CPLUSPLUS
4092 ac_save_CXXFLAGS="$CXXFLAGS"
4093 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4094
4095 AC_MSG_CHECKING([for hw.ncpu sysctl])
4096 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
4097 GCC_TRY_COMPILE_OR_LINK(
4098 [
4099 #include <stddef.h>
4100 #include <sys/sysctl.h>
4101 ],
4102 [
4103 int count;
4104 size_t size = sizeof(count);
4105 int mib[] = { CTL_HW, HW_NCPU };
4106 sysctl(mib, 2, &count, &size, NULL, 0);
4107 ],
4108 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
4109 [glibcxx_cv_SYSCTL_HW_NCPU=no])
4110 ])
4111 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
4112 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
4113 fi
4114 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
4115
4116 CXXFLAGS="$ac_save_CXXFLAGS"
4117 AC_LANG_RESTORE
4118])
43653c33 4119
2a5d011c
BK		 4120dnl
4121dnl Check to see if python pretty printing can be activated.
4122dnl
4123dnl --with-python-dir=dir
4124dnl installs directory into $prefix/dir
4125AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4126
4127AC_MSG_CHECKING([for custom python install directory])
4128AC_ARG_WITH([python-dir],
4129 AS_HELP_STRING([--with-python-dir],
4130 [the location to install Python modules. This path is relative starting from the prefix.]),
4131 [with_python_dir=$withval], [with_python_dir="no"])
4132AC_MSG_RESULT(${with_python_dir})
4133
4134# Needed for installing Python modules during make install.
4135python_mod_dir="${with_python_dir}"
4136AC_SUBST(python_mod_dir)
4137GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4138])
4139
b124c5c4
BK		 4140dnl
4141dnl Check to see if -Werror is disabled.
4142dnl
4143dnl --enable-werror/--disable-werror
4144AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4145 AC_MSG_CHECKING([for -Werror])
4146 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4147 AC_MSG_RESULT($enable_werror)
4148 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4149])
4150
7370b9df
BRF		 4151dnl
4152dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4153dnl and define _GLIBCXX_USE_TMPNAM.
4154dnl
4155AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4156dnl
4157 AC_LANG_SAVE
4158 AC_LANG_CPLUSPLUS
4159 ac_save_CXXFLAGS="$CXXFLAGS"
4160 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4161dnl
4162 AC_MSG_CHECKING([for tmpnam])
4163 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
4164 GCC_TRY_COMPILE_OR_LINK(
4165 [#include <stdio.h>],
4166 [char *tmp = tmpnam(NULL);],
4167 [glibcxx_cv_TMPNAM=yes],
4168 [glibcxx_cv_TMPNAM=no])
4169 ])
4170 if test $glibcxx_cv_TMPNAM = yes; then
4171 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4172 fi
4173 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
4174dnl
4175 CXXFLAGS="$ac_save_CXXFLAGS"
4176 AC_LANG_RESTORE
4177])
2a5d011c 4178
d74e340d
TT		 4179dnl
4180dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4181dnl Some versions of sdt.h were not compatible with C++11.
4182dnl
4183AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
773162d7 4184 AC_MSG_CHECKING([for suitable sys/sdt.h])
d74e340d
TT		 4185 # Note that this test has to be run with the C language.
4186 # Otherwise, sdt.h will try to include some headers from
4187 # libstdc++ itself.
4188 AC_LANG_SAVE
4189 AC_LANG_C
4190 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
4191 # Because we have to run the test in C, we use grep rather
4192 # than the compiler to check for the bug. The bug is that
4193 # were strings without trailing whitespace, causing g++
4194 # to look for operator"". The pattern searches for the fixed
4195 # output.
4196 AC_EGREP_CPP([ \",\" ], [
4197 #include <sys/sdt.h>
4198 int f() { STAP_PROBE(hi, bob); }
4199 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4200 ])
4201 AC_LANG_RESTORE
4202 if test $glibcxx_cv_sys_sdt_h = yes; then
4203 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4204 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4205 fi
4206 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
4207])
4208
375f837b 4209dnl
34a2b755
JW		 4210dnl Control whether the library should define symbols for old and new ABIs.
4211dnl This affects definitions of strings, stringstreams and locale facets.
375f837b 4212dnl
34a2b755 4213dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
375f837b
JW		 4214dnl
4215dnl Defines:
34a2b755 4216dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
375f837b 4217dnl
34a2b755
JW		 4218AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4219 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
8dcf3d3c
JW		 4220 if test x$enable_symvers = xgnu-versioned-namespace; then
4221 # gnu-versioned-namespace is incompatible with the dual ABI.
4222 enable_libstdcxx_dual_abi="no"
4223 fi
34a2b755
JW		 4224 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4225 AC_MSG_NOTICE([dual ABI is disabled])
10d712eb 4226 default_libstdcxx_abi="gcc4-compatible"
375f837b 4227 fi
34a2b755 4228 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
375f837b
JW		 4229])
4230
34a2b755
JW		 4231dnl
4232dnl Check to see which ABI should be enabled by default.
4233dnl
10d712eb 4234dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
34a2b755
JW		 4235dnl
4236dnl Defines:
4237dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4238dnl
4239AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4240 if test x$enable_libstdcxx_dual_abi = xyes; then
4241 AC_MSG_CHECKING([for default std::string ABI to use])
4242 AC_ARG_WITH([default-libstdcxx-abi],
4243 AS_HELP_STRING([--with-default-libstdcxx-abi],
4244 [set the std::string ABI to use by default]),
4245 [case "$withval" in
10d712eb
JW		 4246 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4247 new|cxx11) default_libstdcxx_abi="new" ;;
4248 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4249 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4250 esac
4251 ],
4252 [default_libstdcxx_abi="new"])
34a2b755
JW		 4253 AC_MSG_RESULT(${default_libstdcxx_abi})
4254 fi
10d712eb 4255 if test $default_libstdcxx_abi = "new"; then
34a2b755
JW		 4256 glibcxx_cxx11_abi=1
4257 glibcxx_cxx98_abi=0
4258 else
4259 glibcxx_cxx11_abi=0
4260 glibcxx_cxx98_abi=1
4261 fi
4262 AC_SUBST(glibcxx_cxx98_abi)
4263 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4264])
4265
0ca7ba9a
JW		 4266dnl
4267dnl Check to see whether to build libstdc++fs.a
4268dnl
4269dnl --enable-libstdcxx-filesystem-ts
4270dnl
4271AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4272 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4273 [turns on ISO/IEC TS 18822 support],
4274 [permit yes|no|auto])
4275
4276 AC_MSG_CHECKING([whether to build Filesystem TS support])
bf53e6a9
JW		 4277 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4278 enable_libstdcxx_filesystem_ts=no
4279 fi
0ca7ba9a
JW		 4280 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4281 case "${target_os}" in
4282 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4283 enable_libstdcxx_filesystem_ts=yes
4284 ;;
4285 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
4286 enable_libstdcxx_filesystem_ts=yes
4287 ;;
b76602dc
SH		 4288 rtems*)
4289 enable_libstdcxx_filesystem_ts=yes
4290 ;;
0ca7ba9a 4291 solaris*)
32ff3768 4292 enable_libstdcxx_filesystem_ts=yes
0ca7ba9a
JW		 4293 ;;
4294 *)
4295 enable_libstdcxx_filesystem_ts=no
4296 ;;
4297 esac
4298 fi
4299 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4300 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4301])
4302
4303dnl
7314856c
JW		 4304dnl Check whether the library calls required by the Filesystem TS are present.
4305dnl Defines:
4306dnl HAVE_STRUCT_DIRENT_D_TYPE
4307dnl _GLIBCXX_USE_REALPATH
4308dnl _GLIBCXX_USE_UTIMENSAT
4309dnl _GLIBCXX_USE_ST_MTIM
4310dnl _GLIBCXX_USE_FCHMOD
4311dnl _GLIBCXX_USE_FCHMODAT
4312dnl _GLIBCXX_USE_SENDFILE
4313dnl HAVE_LINK
4314dnl HAVE_READLINK
4315dnl HAVE_SYMLINK
0ca7ba9a
JW		 4316dnl
4317AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4318dnl
7314856c
JW		 4319 if test $enable_libstdcxx_filesystem_ts = yes; then
4320 AC_LANG_SAVE
4321 AC_LANG_CPLUSPLUS
4322 ac_save_CXXFLAGS="$CXXFLAGS"
4323 CXXFLAGS="$CXXFLAGS -fno-exceptions"
0b9fc9fe 4324dnl
7314856c
JW		 4325 AC_MSG_CHECKING([for struct dirent.d_type])
4326 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
4327 GCC_TRY_COMPILE_OR_LINK(
4328 [#include <dirent.h>],
4329 [
4330 struct dirent d;
4331 if (sizeof d.d_type) return 0;
4332 ],
4333 [glibcxx_cv_dirent_d_type=yes],
4334 [glibcxx_cv_dirent_d_type=no])
4335 ])
4336 if test $glibcxx_cv_dirent_d_type = yes; then
4337 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
4338 fi
4339 AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
0ca7ba9a 4340dnl
7314856c
JW		 4341 AC_MSG_CHECKING([for realpath])
4342 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
4343 GCC_TRY_COMPILE_OR_LINK(
4344 [
4345 #include <limits.h>
4346 #include <stdlib.h>
4347 #include <unistd.h>
4348 ],
4349 [
4350 #if _XOPEN_VERSION < 500
4351 #error
4352 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4353 char *tmp = realpath((const char*)NULL, (char*)NULL);
4354 #else
4355 #error
4356 #endif
4357 ],
4358 [glibcxx_cv_realpath=yes],
4359 [glibcxx_cv_realpath=no])
4360 ])
4361 if test $glibcxx_cv_realpath = yes; then
4362 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
4363 fi
4364 AC_MSG_RESULT($glibcxx_cv_realpath)
0ca7ba9a 4365dnl
7314856c
JW		 4366 AC_MSG_CHECKING([for utimensat])
4367 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl
4368 GCC_TRY_COMPILE_OR_LINK(
4369 [
4370 #include <fcntl.h>
4371 #include <sys/stat.h>
4372 ],
4373 [
4374 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4375 int i = utimensat(AT_FDCWD, "path", ts, 0);
4376 ],
4377 [glibcxx_cv_utimensat=yes],
4378 [glibcxx_cv_utimensat=no])
4379 ])
4380 if test $glibcxx_cv_utimensat = yes; then
4381 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4382 fi
4383 AC_MSG_RESULT($glibcxx_cv_utimensat)
0ca7ba9a 4384dnl
7314856c
JW		 4385 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec])
4386 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl
4387 GCC_TRY_COMPILE_OR_LINK(
4388 [ #include <sys/stat.h> ],
4389 [
4390 struct stat st;
4391 return st.st_mtim.tv_nsec;
4392 ],
4393 [glibcxx_cv_st_mtim=yes],
4394 [glibcxx_cv_st_mtim=no])
4395 ])
4396 if test $glibcxx_cv_st_mtim = yes; then
4397 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4398 fi
4399 AC_MSG_RESULT($glibcxx_cv_st_mtim)
a0c4531c 4400dnl
7314856c
JW		 4401 AC_MSG_CHECKING([for fchmod])
4402 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl
4403 GCC_TRY_COMPILE_OR_LINK(
4404 [#include <sys/stat.h>],
4405 [fchmod(1, S_IWUSR);],
4406 [glibcxx_cv_fchmod=yes],
4407 [glibcxx_cv_fchmod=no])
4408 ])
4409 if test $glibcxx_cv_fchmod = yes; then
4410 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4411 fi
4412 AC_MSG_RESULT($glibcxx_cv_fchmod)
bf53e6a9 4413dnl
7314856c
JW		 4414 AC_MSG_CHECKING([for fchmodat])
4415 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl
4416 GCC_TRY_COMPILE_OR_LINK(
4417 [
4418 #include <fcntl.h>
4419 #include <sys/stat.h>
4420 ],
4421 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4422 [glibcxx_cv_fchmodat=yes],
4423 [glibcxx_cv_fchmodat=no])
4424 ])
4425 if test $glibcxx_cv_fchmodat = yes; then
4426 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4427 fi
4428 AC_MSG_RESULT($glibcxx_cv_fchmodat)
4429dnl
4430 AC_MSG_CHECKING([for sendfile that can copy files])
4431 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl
4432 case "${target_os}" in
4433 gnu* | linux* | solaris*)
4434 GCC_TRY_COMPILE_OR_LINK(
4435 [#include <sys/sendfile.h>],
4436 [sendfile(1, 2, (off_t*)0, sizeof 1);],
4437 [glibcxx_cv_sendfile=yes],
4438 [glibcxx_cv_sendfile=no])
4439 ;;
4440 *)
4441 glibcxx_cv_sendfile=no
4442 ;;
4443 esac
4444 ])
4445 if test $glibcxx_cv_sendfile = yes; then
4446 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.])
4447 fi
4448 AC_MSG_RESULT($glibcxx_cv_sendfile)
a0c4531c 4449dnl
7314856c
JW		 4450 AC_MSG_CHECKING([for link])
4451 AC_CACHE_VAL(glibcxx_cv_link, [dnl
4452 GCC_TRY_COMPILE_OR_LINK(
4453 [#include <unistd.h>],
4454 [link("", "");],
4455 [glibcxx_cv_link=yes],
4456 [glibcxx_cv_link=no])
4457 ])
4458 if test $glibcxx_cv_link = yes; then
4459 AC_DEFINE(HAVE_LINK, 1, [Define if link is available in <unistd.h>.])
4460 fi
4461 AC_MSG_RESULT($glibcxx_cv_link)
0ca7ba9a 4462dnl
7314856c
JW		 4463 AC_MSG_CHECKING([for readlink])
4464 AC_CACHE_VAL(glibcxx_cv_readlink, [dnl
4465 GCC_TRY_COMPILE_OR_LINK(
4466 [#include <unistd.h>],
4467 [char buf[32]; readlink("", buf, sizeof(buf));],
4468 [glibcxx_cv_readlink=yes],
4469 [glibcxx_cv_readlink=no])
4470 ])
4471 if test $glibcxx_cv_readlink = yes; then
4472 AC_DEFINE(HAVE_READLINK, 1, [Define if readlink is available in <unistd.h>.])
4473 fi
4474 AC_MSG_RESULT($glibcxx_cv_readlink)
4475dnl
4476 AC_MSG_CHECKING([for symlink])
4477 AC_CACHE_VAL(glibcxx_cv_symlink, [dnl
4478 GCC_TRY_COMPILE_OR_LINK(
4479 [#include <unistd.h>],
4480 [symlink("", "");],
4481 [glibcxx_cv_symlink=yes],
4482 [glibcxx_cv_symlink=no])
4483 ])
4484 if test $glibcxx_cv_symlink = yes; then
4485 AC_DEFINE(HAVE_SYMLINK, 1, [Define if symlink is available in <unistd.h>.])
4486 fi
4487 AC_MSG_RESULT($glibcxx_cv_symlink)
4488dnl
4489 CXXFLAGS="$ac_save_CXXFLAGS"
4490 AC_LANG_RESTORE
4491 fi
0ca7ba9a 4492])
34a2b755 4493
a04d5fc9
TR		 4494dnl
4495dnl Check how size_t is mangled. Copied from libitm.
4496dnl
4497AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [
4498 AC_CACHE_CHECK([how size_t is mangled],
4499 glibcxx_cv_size_t_mangling, [
4500 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
4501 [glibcxx_cv_size_t_mangling=m], [
4502 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
4503 [glibcxx_cv_size_t_mangling=j], [
4504 AC_TRY_COMPILE([],
4505 [extern __SIZE_TYPE__ x; extern unsigned long long x;],
4506 [glibcxx_cv_size_t_mangling=y], [
4507 AC_TRY_COMPILE([],
4508 [extern __SIZE_TYPE__ x; extern unsigned short x;],
f14d2c52
JS		 4509 [glibcxx_cv_size_t_mangling=t], [
4510 AC_TRY_COMPILE([],
4511 [extern __SIZE_TYPE__ x; extern __int20 unsigned x;],
4512 [glibcxx_cv_size_t_mangling=u6uint20],
4513 [glibcxx_cv_size_t_mangling=x])
4514 ])
a04d5fc9
TR		 4515 ])
4516 ])
4517 ])
4518 ])
4519 if test $glibcxx_cv_size_t_mangling = x; then
4520 AC_MSG_ERROR([Unknown underlying type for size_t])
4521 fi
4522 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling],
4523 [Define to the letter to which size_t is mangled.])
4524])
4525
ed3cb497
PN		 4526dnl
4527dnl Determine whether std::exception_ptr symbols should be exported with
4528dnl the symbol versions from GCC 4.6.0 or GCC 7.1.0, depending on which
4529dnl release first added support for std::exception_ptr. Originally it was
4530dnl only supported for targets with always-lock-free atomics for int, but
4531dnl since GCC 7.1 it is supported for all targets.
4532dnl
4533AC_DEFUN([GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER], [
4534 if test $enable_symvers != no; then
4535 AC_MSG_CHECKING([for first version to support std::exception_ptr])
4536 case ${target} in
4537 aarch64-*-* | alpha-*-* | hppa*-*-* | i?86-*-* | x86_64-*-* | \
4538 m68k-*-* | powerpc*-*-* | s390*-*-* | *-*-solaris* )
4539 ac_exception_ptr_since_gcc46=yes
4540 ;;
4541 *)
4542 # If the value of this macro changes then we will need to hardcode
4543 # yes/no here for additional targets based on the original value.
4544 AC_TRY_COMPILE([], [
4545 #if __GCC_ATOMIC_INT_LOCK_FREE <= 1
4546 # error atomic int not always lock free
4547 #endif
4548 ],
4549 [ac_exception_ptr_since_gcc46=yes],
4550 [ac_exception_ptr_since_gcc46=no])
4551 ;;
4552 esac
4553 if test x"$ac_exception_ptr_since_gcc46" = x"yes" ; then
4554 AC_DEFINE(HAVE_EXCEPTION_PTR_SINCE_GCC46, 1,
4555 [Define to 1 if GCC 4.6 supported std::exception_ptr for the target])
4556 AC_MSG_RESULT([4.6.0])
4557 else
4558 AC_MSG_RESULT([7.1.0])
4559 fi
4560 fi
4561])
4562
cddfb1c7 4563# Macros from the top-level gcc directory.
c18dc5cc 4564m4_include([../config/gc++filt.m4])
cddfb1c7 4565m4_include([../config/tls.m4])
1183dc2c 4566m4_include([../config/gthr.m4])
36101de9 4567m4_include([../config/cet.m4])
Mirror of https://gcc.gnu.org/git/gcc.git