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Add one target hook predict_doloop_p, it return true if we can predict it
[thirdparty/gcc.git] / libstdc++-v3 / acinclude.m4
CommitLineData
11764568 1dnl
2dnl GLIBCXX_CONDITIONAL (NAME, SHELL-TEST)
3dnl
4dnl Exactly like AM_CONDITIONAL, but delays evaluation of the test until the
5dnl end of configure. This lets tested variables be reassigned, and the
6dnl conditional will depend on the final state of the variable. For a simple
7dnl example of why this is needed, see GLIBCXX_ENABLE_HOSTED.
8dnl
9m4_define([_m4_divert(glibcxx_diversion)], 8000)dnl
2ad02b6c 10AC_DEFUN([GLIBCXX_CONDITIONAL], [dnl
11764568 11 m4_divert_text([glibcxx_diversion],dnl
12 AM_CONDITIONAL([$1],[$2])
13 )dnl
14])dnl
2ad02b6c 15AC_DEFUN([GLIBCXX_EVALUATE_CONDITIONALS], [m4_undivert([glibcxx_diversion])])dnl
11764568 16
17
68224f8d 18dnl
19dnl Check to see what architecture and operating system we are compiling
20dnl for. Also, if architecture- or OS-specific flags are required for
21dnl compilation, pick them up here.
22dnl
2ad02b6c 23AC_DEFUN([GLIBCXX_CHECK_HOST], [
68224f8d 24 . $glibcxx_srcdir/configure.host
2ad02b6c 25 AC_MSG_NOTICE([CPU config directory is $cpu_include_dir])
26 AC_MSG_NOTICE([OS config directory is $os_include_dir])
68224f8d 27])
28
68224f8d 29dnl
30dnl Initialize the rest of the library configury. At this point we have
31dnl variables like $host.
8400ab1c 32dnl
68224f8d 33dnl Sets:
4591e20f 34dnl SUBDIRS
68224f8d 35dnl Substs:
36dnl glibcxx_builddir (absolute path)
37dnl glibcxx_srcdir (absolute path)
630d52ca 38dnl toplevel_builddir (absolute path)
68224f8d 39dnl toplevel_srcdir (absolute path)
40dnl with_cross_host
41dnl with_newlib
42dnl with_target_subdir
43dnl plus
44dnl - the variables in GLIBCXX_CHECK_HOST / configure.host
45dnl - default settings for all AM_CONFITIONAL test variables
46dnl - lots of tools, like CC and CXX
8400ab1c 47dnl
2ad02b6c 48AC_DEFUN([GLIBCXX_CONFIGURE], [
4591e20f 49 # Keep these sync'd with the list in Makefile.am. The first provides an
50 # expandable list at autoconf time; the second provides an expandable list
51 # (i.e., shell variable) at configure time.
82240b20 52 m4_define([glibcxx_SUBDIRS],[include libsupc++ src src/c++98 src/c++11 src/c++17 src/filesystem doc po testsuite python])
4591e20f 53 SUBDIRS='glibcxx_SUBDIRS'
54
acf7a6bc 55 # These need to be absolute paths, yet at the same time need to
56 # canonicalize only relative paths, because then amd will not unmount
57 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
5a64d8cf 58 glibcxx_builddir=`${PWDCMD-pwd}`
acf7a6bc 59 case $srcdir in
68224f8d 60 [\\/$]* | ?:[\\/]*) glibcxx_srcdir=${srcdir} ;;
61 *) glibcxx_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
acf7a6bc 62 esac
630d52ca 63 toplevel_builddir=${glibcxx_builddir}/..
68224f8d 64 toplevel_srcdir=${glibcxx_srcdir}/..
5a64d8cf 65 AC_SUBST(glibcxx_builddir)
66 AC_SUBST(glibcxx_srcdir)
630d52ca 67 AC_SUBST(toplevel_builddir)
68224f8d 68 AC_SUBST(toplevel_srcdir)
acf7a6bc 69
68224f8d 70 # We use these options to decide which functions to include. They are
71 # set from the top level.
72 AC_ARG_WITH([target-subdir],
73 AC_HELP_STRING([--with-target-subdir=SUBDIR],
dca89719 74 [configuring in a subdirectory]))
68224f8d 75
76 AC_ARG_WITH([cross-host],
77 AC_HELP_STRING([--with-cross-host=HOST],
dca89719 78 [configuring with a cross compiler]))
68224f8d 79
80 AC_ARG_WITH([newlib],
81 AC_HELP_STRING([--with-newlib],
dca89719 82 [assume newlib as a system C library]))
68224f8d 83
68224f8d 84 # Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
85 # available). Uncomment the next line to force a particular method.
86 AC_PROG_LN_S
87 #LN_S='cp -p'
88
f1f1b9ae 89 AC_CHECK_TOOL(AS, as)
90 AC_CHECK_TOOL(AR, ar)
c45e0e39 91 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
b9e8095b 92
f1f1b9ae 93 AM_MAINTAINER_MODE
b9e8095b 94
11764568 95 # Set up safe default values for all subsequent AM_CONDITIONAL tests
96 # which are themselves conditionally expanded.
97 ## (Right now, this only matters for enable_wchar_t, but nothing prevents
98 ## other macros from doing the same. This should be automated.) -pme
d1fde434 99
eb43532a 100 # Check for C library flavor since GNU/Linux platforms use different
101 # configuration directories depending on the C library in use.
ee085235 102 AC_EGREP_CPP([_using_uclibc], [
103 #include <stdio.h>
104 #if __UCLIBC__
105 _using_uclibc
106 #endif
107 ], uclibc=yes, uclibc=no)
108
11c2a83c 109 AC_EGREP_CPP([_using_bionic], [
110 #include <stdio.h>
111 #if __BIONIC__
112 _using_bionic
113 #endif
114 ], bionic=yes, bionic=no)
115
68224f8d 116 # Find platform-specific directories containing configuration info.
117 # Also possibly modify flags used elsewhere, as needed by the platform.
5a64d8cf 118 GLIBCXX_CHECK_HOST
b9e8095b 119])
120
121
c21bc234 122dnl
457683de 123dnl Tests for newer compiler features, or features that are present in newer
124dnl compiler versions but not older compiler versions still in use, should
125dnl be placed here.
b9e8095b 126dnl
68224f8d 127dnl Defines:
128dnl WERROR='-Werror' if requested and possible; g++'s that lack the
129dnl new inlining code or the new system_header pragma will die on -Werror.
130dnl Leave it out by default and use maint-mode to use it.
131dnl SECTION_FLAGS='-ffunction-sections -fdata-sections' if
132dnl compiler supports it and the user has not requested debug mode.
b9386e63 133dnl
2ad02b6c 134AC_DEFUN([GLIBCXX_CHECK_COMPILER_FEATURES], [
c51c23c3 135 # All these tests are for C++; save the language and the compiler flags.
457683de 136 # The CXXFLAGS thing is suspicious, but based on similar bits previously
5a64d8cf 137 # found in GLIBCXX_CONFIGURE.
c51c23c3 138 AC_LANG_SAVE
139 AC_LANG_CPLUSPLUS
140 ac_test_CXXFLAGS="${CXXFLAGS+set}"
141 ac_save_CXXFLAGS="$CXXFLAGS"
c51c23c3 142
c21bc234 143 # Check for -ffunction-sections -fdata-sections
144 AC_MSG_CHECKING([for g++ that supports -ffunction-sections -fdata-sections])
acccde02 145 CXXFLAGS='-g -Werror -ffunction-sections -fdata-sections'
146 AC_TRY_COMPILE([int foo; void bar() { };],, [ac_fdsections=yes], [ac_fdsections=no])
c21bc234 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
7f713ccf 153 if test x"$ac_fdsections" = x"yes"; then
c21bc234 154 SECTION_FLAGS='-ffunction-sections -fdata-sections'
155 fi
156 AC_MSG_RESULT($ac_fdsections)
157
c51c23c3 158 AC_LANG_RESTORE
c21bc234 159 AC_SUBST(SECTION_FLAGS)
b9e8095b 160])
161
c21bc234 162
163dnl
06f58ac6 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
68224f8d 168dnl Defines:
169dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible
bc12299b 170dnl OPT_LDFLAGS='-Wl,-O1' and '-z,relro' if possible
68224f8d 171dnl LD (as a side effect of testing)
172dnl Sets:
173dnl with_gnu_ld
09ffaa43 174dnl glibcxx_ld_is_gold (set to "no" or "yes")
68224f8d 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.
c21bc234 179dnl
2ad02b6c 180AC_DEFUN([GLIBCXX_CHECK_LINKER_FEATURES], [
06f58ac6 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...
13bad5d9 184 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS=''
185 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS=''
06f58ac6 186 AC_REQUIRE([AC_PROG_LD])
68224f8d 187 AC_REQUIRE([AC_PROG_AWK])
445cdc9a 188
00c7100f 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=$ac_cv_prog_gnu_ld
201 fi
202 fi
203
204 # Start by getting the version number. I think the libtool test already
205 # does some of this, but throws away the result.
09ffaa43 206 glibcxx_ld_is_gold=no
a8c6eff1 207 if test x"$with_gnu_ld" = x"yes"; then
208 AC_MSG_CHECKING([for ld version])
209 changequote(,)
09ffaa43 210 if $LD --version 2>/dev/null | grep 'GNU gold' >/dev/null 2>&1; then
211 glibcxx_ld_is_gold=yes
212 fi
8dc52806 213 ldver=`$LD --version 2>/dev/null |
8b501d36 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'`
a8c6eff1 215 changequote([,])
216 glibcxx_gnu_ld_version=`echo $ldver | \
dca89719 217 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'`
a8c6eff1 218 AC_MSG_RESULT($glibcxx_gnu_ld_version)
219 fi
00c7100f 220
445cdc9a 221 # Set --gc-sections.
09ffaa43 222 glibcxx_have_gc_sections=no
223 if test "$glibcxx_ld_is_gold" = "yes"; then
224 if $LD --help 2>/dev/null | grep gc-sections >/dev/null 2>&1; then
225 glibcxx_have_gc_sections=yes
226 fi
227 else
228 glibcxx_gcsections_min_ld=21602
dca89719 229 if test x"$with_gnu_ld" = x"yes" &&
3afdc8c9 230 test $glibcxx_gnu_ld_version -gt $glibcxx_gcsections_min_ld ; then
09ffaa43 231 glibcxx_have_gc_sections=yes
232 fi
233 fi
234 if test "$glibcxx_have_gc_sections" = "yes"; then
3afdc8c9 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.
06f58ac6 238
06f58ac6 239 ac_test_CFLAGS="${CFLAGS+set}"
240 ac_save_CFLAGS="$CFLAGS"
86bb9627 241 CFLAGS='-Wl,--gc-sections'
06f58ac6 242
243 # Check for -Wl,--gc-sections
244 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections])
e3acaece 245 AC_TRY_LINK([ int one(void) { return 1; }
246 int two(void) { return 2; }
247 ], [ two(); ] , [ac_gcsections=yes], [ac_gcsections=no])
78e1dded 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 $LD --gc-sections -o conftest conftest.o 2>&1 | \
253 grep "Warning: gc-sections option ignored" > /dev/null; then
254 ac_gcsections=no
255 fi
256 fi
257 rm -f conftest.c conftest.o conftest
258 fi
e3acaece 259 if test "$ac_gcsections" = "yes"; then
260 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS"
261 fi
262 AC_MSG_RESULT($ac_gcsections)
263
06f58ac6 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
445cdc9a 270 fi
985550e9 271
bc12299b 272 # Set -z,relro.
fd9a63cd 273 # Note this is only for shared objects.
bc12299b 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
445cdc9a 285 # Set linker optimization flags.
7f713ccf 286 if test x"$with_gnu_ld" = x"yes"; then
13bad5d9 287 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS"
06f58ac6 288 fi
445cdc9a 289
c21bc234 290 AC_SUBST(SECTION_LDFLAGS)
06f58ac6 291 AC_SUBST(OPT_LDFLAGS)
c21bc234 292])
293
294
b9e8095b 295dnl
68224f8d 296dnl Check for headers for, and arguments to, the setrlimit() function.
297dnl Used only in testsuite_hooks.h. Called from GLIBCXX_CONFIGURE_TESTSUITE.
7f713ccf 298dnl
68224f8d 299dnl Defines:
dca89719 300dnl _GLIBCXX_RES_LIMITS if we can set artificial resource limits
ac7a2146 301dnl various HAVE_LIMIT_* for individual limit names
7f713ccf 302dnl
2ad02b6c 303AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT_ancilliary], [
bd30e718 304 AC_MSG_CHECKING([for RLIMIT_$1])
68224f8d 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])
ac7a2146 312 AC_DEFINE_UNQUOTED(HAVE_LIMIT_$1, $glibcxx_mresult,
dca89719 313 [Only used in build directory testsuite_hooks.h.])
bd30e718 314 if test $glibcxx_mresult = 1 ; then res=yes ; else res=no ; fi
315 AC_MSG_RESULT($res)
68224f8d 316])
317
2ad02b6c 318AC_DEFUN([GLIBCXX_CHECK_SETRLIMIT], [
68224f8d 319 setrlimit_have_headers=yes
320 AC_CHECK_HEADERS(unistd.h sys/time.h sys/resource.h,
dca89719 321 [],
322 [setrlimit_have_headers=no])
68224f8d 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)
ac7a2146 331 GLIBCXX_CHECK_SETRLIMIT_ancilliary(FSIZE)
68224f8d 332
333 # Check for rlimit, setrlimit.
6992582a 334 AC_CACHE_VAL(glibcxx_cv_setrlimit, [
68224f8d 335 AC_TRY_COMPILE(
dca89719 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])
68224f8d 343 ])
344 fi
345
ac7a2146 346 AC_MSG_CHECKING([for testsuite resource limits support])
6992582a 347 if test $setrlimit_have_headers = yes && test $glibcxx_cv_setrlimit = yes; then
ac7a2146 348 ac_res_limits=yes
d64903a9 349 AC_DEFINE(_GLIBCXX_RES_LIMITS, 1,
dca89719 350 [Define if using setrlimit to set resource limits during
351 "make check"])
68224f8d 352 else
ac7a2146 353 ac_res_limits=no
68224f8d 354 fi
ac7a2146 355 AC_MSG_RESULT($ac_res_limits)
7f713ccf 356])
357
358
7f713ccf 359dnl
68224f8d 360dnl Check whether S_ISREG (Posix) or S_IFREG is available in <sys/stat.h>.
361dnl Define HAVE_S_ISREG / HAVE_S_IFREG appropriately.
7f713ccf 362dnl
2ad02b6c 363AC_DEFUN([GLIBCXX_CHECK_S_ISREG_OR_S_IFREG], [
4f37153a 364
365 AC_LANG_SAVE
366 AC_LANG_CPLUSPLUS
367 ac_save_CXXFLAGS="$CXXFLAGS"
368 CXXFLAGS="$CXXFLAGS -fno-exceptions"
369
bd30e718 370 AC_MSG_CHECKING([for S_ISREG or S_IFREG])
68224f8d 371 AC_CACHE_VAL(glibcxx_cv_S_ISREG, [
4f37153a 372 GCC_TRY_COMPILE_OR_LINK(
68224f8d 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, [
4f37153a 381 GCC_TRY_COMPILE_OR_LINK(
68224f8d 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 ])
bd30e718 389 res=no
68224f8d 390 if test $glibcxx_cv_S_ISREG = yes; then
dca89719 391 AC_DEFINE(HAVE_S_ISREG, 1,
74ae3614 392 [Define if S_ISREG is available in <sys/stat.h>.])
bd30e718 393 res=S_ISREG
68224f8d 394 elif test $glibcxx_cv_S_IFREG = yes; then
d64903a9 395 AC_DEFINE(HAVE_S_IFREG, 1,
dca89719 396 [Define if S_IFREG is available in <sys/stat.h>.])
bd30e718 397 res=S_IFREG
68224f8d 398 fi
bd30e718 399 AC_MSG_RESULT($res)
4f37153a 400
401 CXXFLAGS="$ac_save_CXXFLAGS"
402 AC_LANG_RESTORE
b9e8095b 403])
404
405
401f263f 406dnl
68224f8d 407dnl Check whether poll is available in <poll.h>, and define HAVE_POLL.
401f263f 408dnl
2ad02b6c 409AC_DEFUN([GLIBCXX_CHECK_POLL], [
4f37153a 410
411 AC_LANG_SAVE
412 AC_LANG_CPLUSPLUS
413 ac_save_CXXFLAGS="$CXXFLAGS"
414 CXXFLAGS="$CXXFLAGS -fno-exceptions"
415
bd30e718 416 AC_MSG_CHECKING([for poll])
68224f8d 417 AC_CACHE_VAL(glibcxx_cv_POLL, [
4f37153a 418 GCC_TRY_COMPILE_OR_LINK(
68224f8d 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 $glibcxx_cv_POLL = yes; then
d64903a9 427 AC_DEFINE(HAVE_POLL, 1, [Define if poll is available in <poll.h>.])
68224f8d 428 fi
bd30e718 429 AC_MSG_RESULT($glibcxx_cv_POLL)
4f37153a 430
431 CXXFLAGS="$ac_save_CXXFLAGS"
432 AC_LANG_RESTORE
68224f8d 433])
434
435
436dnl
437dnl Check whether writev is available in <sys/uio.h>, and define HAVE_WRITEV.
438dnl
2ad02b6c 439AC_DEFUN([GLIBCXX_CHECK_WRITEV], [
4f37153a 440
441 AC_LANG_SAVE
442 AC_LANG_CPLUSPLUS
443 ac_save_CXXFLAGS="$CXXFLAGS"
444 CXXFLAGS="$CXXFLAGS -fno-exceptions"
445
bd30e718 446 AC_MSG_CHECKING([for writev])
68224f8d 447 AC_CACHE_VAL(glibcxx_cv_WRITEV, [
4f37153a 448 GCC_TRY_COMPILE_OR_LINK(
68224f8d 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 $glibcxx_cv_WRITEV = yes; then
d64903a9 456 AC_DEFINE(HAVE_WRITEV, 1, [Define if writev is available in <sys/uio.h>.])
68224f8d 457 fi
bd30e718 458 AC_MSG_RESULT($glibcxx_cv_WRITEV)
4f37153a 459
460 CXXFLAGS="$ac_save_CXXFLAGS"
461 AC_LANG_RESTORE
68224f8d 462])
463
464
440c107f 465dnl
466dnl Check whether int64_t is available in <stdint.h>, and define HAVE_INT64_T.
e061cb0f 467dnl Also check whether int64_t is actually a typedef to long or long long.
440c107f 468dnl
2ad02b6c 469AC_DEFUN([GLIBCXX_CHECK_INT64_T], [
e061cb0f 470
471 AC_LANG_SAVE
472 AC_LANG_CPLUSPLUS
473
bd30e718 474 AC_MSG_CHECKING([for int64_t])
440c107f 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 ])
e061cb0f 482
440c107f 483 if test $glibcxx_cv_INT64_T = yes; then
d64903a9 484 AC_DEFINE(HAVE_INT64_T, 1, [Define if int64_t is available in <stdint.h>.])
e061cb0f 485 AC_MSG_RESULT($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(
dca89719 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];], [],
e061cb0f 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(
dca89719 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];], [],
e061cb0f 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
440c107f 516 fi
e061cb0f 517
518 AC_LANG_RESTORE
440c107f 519])
520
521
522dnl
523dnl Check whether LFS support is available.
524dnl
2ad02b6c 525AC_DEFUN([GLIBCXX_CHECK_LFS], [
14636c22 526 AC_LANG_SAVE
f6c9c179 527 AC_LANG_CPLUSPLUS
528 ac_save_CXXFLAGS="$CXXFLAGS"
dca89719 529 CXXFLAGS="$CXXFLAGS -fno-exceptions"
bd30e718 530 AC_MSG_CHECKING([for LFS support])
440c107f 531 AC_CACHE_VAL(glibcxx_cv_LFS, [
4f37153a 532 GCC_TRY_COMPILE_OR_LINK(
14636c22 533 [#include <unistd.h>
534 #include <stdio.h>
b1e0564a 535 #include <sys/stat.h>
14636c22 536 ],
c92ce3f5 537 [FILE* fp;
538 fopen64("t", "w");
539 fseeko64(fp, 0, SEEK_CUR);
540 ftello64(fp);
b1e0564a 541 lseek64(1, 0, SEEK_CUR);
542 struct stat64 buf;
543 fstat64(1, &buf);],
440c107f 544 [glibcxx_cv_LFS=yes],
545 [glibcxx_cv_LFS=no])
546 ])
547 if test $glibcxx_cv_LFS = yes; then
d64903a9 548 AC_DEFINE(_GLIBCXX_USE_LFS, 1, [Define if LFS support is available.])
440c107f 549 fi
bd30e718 550 AC_MSG_RESULT($glibcxx_cv_LFS)
f6c9c179 551 CXXFLAGS="$ac_save_CXXFLAGS"
552 AC_LANG_RESTORE
440c107f 553])
554
555
06450f58 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
a34764b1 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
06450f58 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 $enable_fully_dynamic_string = yes; then
a34764b1 571 enable_fully_dynamic_string_def=1
572 else
573 enable_fully_dynamic_string_def=0
06450f58 574 fi
a34764b1 575 AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
576 [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
06450f58 577])
578
579
68224f8d 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:
dca89719 587dnl enable_abi_check
c37e7a9d 588dnl GLIBCXX_TEST_WCHAR_T
589dnl GLIBCXX_TEST_THREAD
68224f8d 590dnl Substs:
591dnl baseline_dir
b88a1a12 592dnl baseline_subdir_switch
68224f8d 593dnl
2ad02b6c 594AC_DEFUN([GLIBCXX_CONFIGURE_TESTSUITE], [
735a7090 595 # Do checks for resource limit functions.
596 GLIBCXX_CHECK_SETRLIMIT
68224f8d 597
735a7090 598 if $GLIBCXX_IS_NATIVE ; then
68224f8d 599 # Look for setenv, so that extended locale tests can be performed.
600 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3(setenv)
10f7a2cb 601 fi
3795d5fd 602
10f7a2cb 603 if $GLIBCXX_IS_NATIVE && test $is_hosted = yes &&
604 test $enable_symvers != no; then
605 case "$host" in
606 *-*-cygwin*)
dca89719 607 enable_abi_check=no ;;
10f7a2cb 608 *)
dca89719 609 enable_abi_check=yes ;;
10f7a2cb 610 esac
3795d5fd 611 else
612 # Only build this as native, since automake does not understand
613 # CXX_FOR_BUILD.
614 enable_abi_check=no
68224f8d 615 fi
dca89719 616
68224f8d 617 # Export file names for ABI checking.
da177fdf 618 baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
68224f8d 619 AC_SUBST(baseline_dir)
b88a1a12 620 baseline_subdir_switch="$abi_baseline_subdir_switch"
621 AC_SUBST(baseline_subdir_switch)
68224f8d 622])
623
624
dca89719 625dnl
6dbb3e64 626dnl Does any necessary configuration for docbook in the docs directory.
dca89719 627dnl
628dnl XSLTPROC must be set before this
629dnl
630dnl Sets:
631dnl glibcxx_stylesheets
632dnl Substs:
633dnl XSL_STYLE_DIR
634dnl
635AC_DEFUN([GLIBCXX_CONFIGURE_DOCBOOK], [
636
53ea0887 637glibcxx_docbook_url=http://docbook.sourceforge.net/release/xsl-ns/current/
dca89719 638
639AC_MSG_CHECKING([for local stylesheet directory])
640glibcxx_local_stylesheets=no
53ea0887 641if test x${XMLCATALOG} = xyes && xsl_style_dir=`xmlcatalog "" $glibcxx_docbook_url 2>/dev/null`
642then
643 XSL_STYLE_DIR=`echo $xsl_style_dir | sed -n 's;^file://;;p'`
644 glibcxx_local_stylesheets=yes
645else
646 for dir in \
647 /usr/share/sgml/docbook/xsl-ns-stylesheets \
648 /usr/share/xml/docbook/stylesheet/docbook-xsl-ns \
649 /usr/share/xml/docbook/stylesheet/nwalsh5/current \
650 /usr/share/xml/docbook/stylesheet/nwalsh/current
651 do
652 if test -d $dir; then
653 glibcxx_local_stylesheets=yes
654 XSL_STYLE_DIR=$dir
655 break
656 fi
657 done
dca89719 658fi
659AC_MSG_RESULT($glibcxx_local_stylesheets)
660
661if test x"$glibcxx_local_stylesheets" = x"yes"; then
662 AC_SUBST(XSL_STYLE_DIR)
663 AC_MSG_NOTICE($XSL_STYLE_DIR)
53ea0887 664
665 AC_MSG_CHECKING([for docbook stylesheets for documentation creation])
666 glibcxx_stylesheets=no
667 if test x${XMLCATALOG} = xno || xmlcatalog "" $glibcxx_docbook_url/xhtml/docbook.xsl >/dev/null 2>&1; then
668 if test x${XSLTPROC} = xyes && echo '<title/>' | xsltproc --noout --nonet --xinclude $glibcxx_docbook_url/xhtml/docbook.xsl - 2>/dev/null; then
669 glibcxx_stylesheets=yes
670 fi
671 fi
672 AC_MSG_RESULT($glibcxx_stylesheets)
673
dca89719 674else
675 glibcxx_stylesheets=no
676fi
6dbb3e64 677
678# Check for epub3 dependencies.
679AC_MSG_CHECKING([for epub3 stylesheets for documentation creation])
680glibcxx_epub_stylesheets=no
681if test x"$glibcxx_local_stylesheets" = x"yes"; then
b927314b 682 if test -f "$XSL_STYLE_DIR/epub3/chunk.xsl"; then
6dbb3e64 683 glibcxx_epub_stylesheets=yes
684 fi
685fi
686AC_MSG_RESULT($glibcxx_epub_stylesheets)
b927314b 687AM_CONDITIONAL(BUILD_EPUB, test x"$glibcxx_epub_stylesheets" = x"yes")
6dbb3e64 688
dca89719 689])
690
691
68224f8d 692dnl
693dnl Set up *_INCLUDES variables for all sundry Makefile.am's.
694dnl
695dnl Substs:
696dnl GLIBCXX_INCLUDES
697dnl TOPLEVEL_INCLUDES
68224f8d 698dnl
2ad02b6c 699AC_DEFUN([GLIBCXX_EXPORT_INCLUDES], [
2eb169cd 700 # Used for every C++ compile we perform.
701 GLIBCXX_INCLUDES="\
702-I$glibcxx_builddir/include/$host_alias \
703-I$glibcxx_builddir/include \
704-I$glibcxx_srcdir/libsupc++"
68224f8d 705
2eb169cd 706 # For Canadian crosses, pick this up too.
68224f8d 707 if test $CANADIAN = yes; then
c0d1c48c 708 GLIBCXX_INCLUDES="$GLIBCXX_INCLUDES -I\${includedir}"
68224f8d 709 fi
710
2eb169cd 711 # Stuff in the actual top level. Currently only used by libsupc++ to
e59be7e3 712 # get unwind* headers from the libgcc dir.
713 #TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc -I$(toplevel_srcdir)/include'
714 TOPLEVEL_INCLUDES='-I$(toplevel_srcdir)/libgcc'
68224f8d 715
716 # Now, export this to all the little Makefiles....
717 AC_SUBST(GLIBCXX_INCLUDES)
718 AC_SUBST(TOPLEVEL_INCLUDES)
68224f8d 719])
720
721
722dnl
723dnl Set up *_FLAGS and *FLAGS variables for all sundry Makefile.am's.
724dnl (SECTION_FLAGS is done under CHECK_COMPILER_FEATURES.)
725dnl
726dnl Substs:
727dnl OPTIMIZE_CXXFLAGS
728dnl WARN_FLAGS
729dnl
2ad02b6c 730AC_DEFUN([GLIBCXX_EXPORT_FLAGS], [
68224f8d 731 # Optimization flags that are probably a good idea for thrill-seekers. Just
732 # uncomment the lines below and make, everything else is ready to go...
074377fd 733 # Alternatively OPTIMIZE_CXXFLAGS can be set in configure.host.
68224f8d 734 # OPTIMIZE_CXXFLAGS = -O3 -fstrict-aliasing -fvtable-gc
68224f8d 735 AC_SUBST(OPTIMIZE_CXXFLAGS)
736
daa87973 737 WARN_FLAGS="-Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2"
68224f8d 738 AC_SUBST(WARN_FLAGS)
739])
740
741
742dnl
743dnl All installation directory information is determined here.
744dnl
745dnl Substs:
746dnl gxx_install_dir
747dnl glibcxx_prefixdir
748dnl glibcxx_toolexecdir
749dnl glibcxx_toolexeclibdir
750dnl
751dnl Assumes cross_compiling bits already done, and with_cross_host in
752dnl particular.
753dnl
0bf9691e 754dnl This logic must match gcc/configure.ac's setting of gcc_gxx_include_dir.
717b8f50 755dnl config/gxx-include-dir.m4 must be kept consistant with this as well.
2ad02b6c 756AC_DEFUN([GLIBCXX_EXPORT_INSTALL_INFO], [
68224f8d 757 glibcxx_toolexecdir=no
758 glibcxx_toolexeclibdir=no
759 glibcxx_prefixdir=$prefix
760
761 AC_MSG_CHECKING([for gxx-include-dir])
762 AC_ARG_WITH([gxx-include-dir],
763 AC_HELP_STRING([--with-gxx-include-dir=DIR],
dca89719 764 [installation directory for include files]),
68224f8d 765 [case "$withval" in
766 yes) AC_MSG_ERROR([Missing directory for --with-gxx-include-dir]) ;;
767 no) gxx_include_dir=no ;;
768 *) gxx_include_dir=$withval ;;
769 esac],
770 [gxx_include_dir=no])
771 AC_MSG_RESULT($gxx_include_dir)
772
773 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
774 AC_ARG_ENABLE([version-specific-runtime-libs],
775 AC_HELP_STRING([--enable-version-specific-runtime-libs],
dca89719 776 [Specify that runtime libraries should be installed in a compiler-specific directory]),
68224f8d 777 [case "$enableval" in
778 yes) version_specific_libs=yes ;;
779 no) version_specific_libs=no ;;
780 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
781 esac],
782 [version_specific_libs=no])
783 AC_MSG_RESULT($version_specific_libs)
784
785 # Default case for install directory for include files.
786 if test $version_specific_libs = no && test $gxx_include_dir = no; then
0bf9691e 787 gxx_include_dir='include/c++/${gcc_version}'
dca89719 788 if test -n "$with_cross_host" &&
789 test x"$with_cross_host" != x"no"; then
0bf9691e 790 gxx_include_dir='${prefix}/${target_alias}/'"$gxx_include_dir"
791 else
792 gxx_include_dir='${prefix}/'"$gxx_include_dir"
793 fi
68224f8d 794 fi
795
796 # Version-specific runtime libs processing.
797 if test $version_specific_libs = yes; then
798 # Need the gcc compiler version to know where to install libraries
799 # and header files if --enable-version-specific-runtime-libs option
949aa2c6 800 # is selected. FIXME: these variables are misnamed, there are
801 # no executables installed in _toolexecdir or _toolexeclibdir.
68224f8d 802 if test x"$gxx_include_dir" = x"no"; then
b6ca54bb 803 gxx_include_dir='${libdir}/gcc/${host_alias}/${gcc_version}/include/c++'
68224f8d 804 fi
949aa2c6 805 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
b6ca54bb 806 glibcxx_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
68224f8d 807 fi
808
809 # Calculate glibcxx_toolexecdir, glibcxx_toolexeclibdir
810 # Install a library built with a cross compiler in tooldir, not libdir.
811 if test x"$glibcxx_toolexecdir" = x"no"; then
812 if test -n "$with_cross_host" &&
813 test x"$with_cross_host" != x"no"; then
f4a06a64 814 glibcxx_toolexecdir='${exec_prefix}/${host_alias}'
815 glibcxx_toolexeclibdir='${toolexecdir}/lib'
68224f8d 816 else
949aa2c6 817 glibcxx_toolexecdir='${libdir}/gcc/${host_alias}'
f4a06a64 818 glibcxx_toolexeclibdir='${libdir}'
68224f8d 819 fi
f4a06a64 820 multi_os_directory=`$CXX -print-multi-os-directory`
68224f8d 821 case $multi_os_directory in
822 .) ;; # Avoid trailing /.
823 *) glibcxx_toolexeclibdir=$glibcxx_toolexeclibdir/$multi_os_directory ;;
824 esac
825 fi
826
827 AC_MSG_CHECKING([for install location])
828 AC_MSG_RESULT($gxx_include_dir)
829
830 AC_SUBST(glibcxx_prefixdir)
831 AC_SUBST(gxx_include_dir)
832 AC_SUBST(glibcxx_toolexecdir)
833 AC_SUBST(glibcxx_toolexeclibdir)
834])
835
836
837dnl
838dnl GLIBCXX_ENABLE
839dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
840dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
841dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
842dnl
2da704e6 843dnl See manual/appendix_porting.html#appendix.porting.build_hacking for
844dnl documentation.
68224f8d 845dnl
846m4_define([GLIBCXX_ENABLE],[dnl
847m4_define([_g_switch],[--enable-$1])dnl
dae1a11c 848m4_define([_g_help],[AC_HELP_STRING([_g_switch$3],[$4 @<:@default=$2@:>@])])dnl
849 AC_ARG_ENABLE([$1],m4_dquote(_g_help),
68224f8d 850 m4_bmatch([$5],
851 [^permit ],
852 [[
853 case "$enableval" in
854 m4_bpatsubst([$5],[permit ])) ;;
855 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
dca89719 856 dnl Idea for future: generate a URL pointing to
857 dnl "onlinedocs/configopts.html#whatever"
68224f8d 858 esac
859 ]],
860 [^$],
861 [[
862 case "$enableval" in
863 yes|no) ;;
864 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
865 esac
866 ]],
867 [[$5]]),
868 [enable_]m4_bpatsubst([$1],-,_)[=][$2])
869m4_undefine([_g_switch])dnl
870m4_undefine([_g_help])dnl
871])
872
873
874dnl
875dnl Check for ISO/IEC 9899:1999 "C99" support.
876dnl
877dnl --enable-c99 defines _GLIBCXX_USE_C99
878dnl --disable-c99 leaves _GLIBCXX_USE_C99 undefined
879dnl + Usage: GLIBCXX_ENABLE_C99[(DEFAULT)]
880dnl Where DEFAULT is either `yes' or `no'.
881dnl + If 'C99' stuff is not available, ignores DEFAULT and sets `no'.
882dnl
2ad02b6c 883AC_DEFUN([GLIBCXX_ENABLE_C99], [
68224f8d 884 GLIBCXX_ENABLE(c99,$1,,[turns on ISO/IEC 9899:1999 support])
885
c586733c 886 if test x"$enable_c99" = x"yes"; then
bdb62e6a 887 AC_LANG_SAVE
888 AC_LANG_CPLUSPLUS
889
890 # Use -std=c++98 (instead of -std=gnu++98) because leaving __STRICT_ANSI__
891 # undefined may cause fake C99 facilities, like pre-standard snprintf,
892 # to be spuriously enabled.
893 ac_save_CXXFLAGS="$CXXFLAGS"
894 CXXFLAGS="$CXXFLAGS -std=c++98"
895 ac_save_LIBS="$LIBS"
896 ac_save_gcc_no_link="$gcc_no_link"
897
898 if test x$gcc_no_link != xyes; then
899 # Use -fno-exceptions to that the C driver can link these tests without
900 # hitting undefined references to personality routines.
901 CXXFLAGS="$CXXFLAGS -fno-exceptions"
902 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
903 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
904 gcc_no_link=yes
905 ])
906 fi
c586733c 907
bdb62e6a 908 # Check for the existence of <math.h> functions used if C99 is enabled.
909 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++98])
910 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx98, [
911 GCC_TRY_COMPILE_OR_LINK(
912 [#include <math.h>
913 volatile double d1, d2;
914 volatile int i;],
915 [i = fpclassify(d1);
916 i = isfinite(d1);
917 i = isinf(d1);
918 i = isnan(d1);
919 i = isnormal(d1);
920 i = signbit(d1);
921 i = isgreater(d1, d2);
922 i = isgreaterequal(d1, d2);
923 i = isless(d1, d2);
924 i = islessequal(d1, d2);
925 i = islessgreater(d1, d2);
926 i = islessgreater(d1, d2);
927 i = isunordered(d1, d2);
928 ], [glibcxx_cv_c99_math_cxx98=yes], [glibcxx_cv_c99_math_cxx98=no])
929 ])
930 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx98)
931 if test x"$glibcxx_cv_c99_math_cxx98" = x"yes"; then
932 AC_DEFINE(_GLIBCXX98_USE_C99_MATH, 1,
933 [Define if C99 functions or macros in <math.h> should be imported
934 in <cmath> in namespace std for C++98.])
935 fi
68224f8d 936
bdb62e6a 937 # Check for the existence of <complex.h> complex math functions.
938 # This is necessary even though libstdc++ uses the builtin versions
939 # of these functions, because if the builtin cannot be used, a reference
940 # to the library function is emitted.
941 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
942 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
943 if test x"$ac_has_complex_h" = x"yes"; then
944 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++98])
945 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx98, [
946 GCC_TRY_COMPILE_OR_LINK(
947 [#include <complex.h>
948 typedef __complex__ float float_type;
949 typedef __complex__ double double_type;
950 typedef __complex__ long double ld_type;
951 volatile float_type tmpf;
952 volatile double_type tmpd;
953 volatile ld_type tmpld;
954 volatile float f;
955 volatile double d;
956 volatile long double ld;],
957 [f = cabsf(tmpf);
958 f = cargf(tmpf);
959 tmpf = ccosf(tmpf);
960 tmpf = ccoshf(tmpf);
961 tmpf = cexpf(tmpf);
962 tmpf = clogf(tmpf);
963 tmpf = csinf(tmpf);
964 tmpf = csinhf(tmpf);
965 tmpf = csqrtf(tmpf);
966 tmpf = ctanf(tmpf);
967 tmpf = ctanhf(tmpf);
968 tmpf = cpowf(tmpf, tmpf);
969 tmpf = cprojf(tmpf);
970 d = cabs(tmpd);
971 d = carg(tmpd);
972 tmpd = ccos(tmpd);
973 tmpd = ccosh(tmpd);
974 tmpd = cexp(tmpd);
975 tmpd = clog(tmpd);
976 tmpd = csin(tmpd);
977 tmpd = csinh(tmpd);
978 tmpd = csqrt(tmpd);
979 tmpd = ctan(tmpd);
980 tmpd = ctanh(tmpd);
981 tmpd = cpow(tmpd, tmpd);
982 tmpd = cproj(tmpd);
983 ld = cabsl(tmpld);
984 ld = cargl(tmpld);
985 tmpld = ccosl(tmpld);
986 tmpld = ccoshl(tmpld);
987 tmpld = cexpl(tmpld);
988 tmpld = clogl(tmpld);
989 tmpld = csinl(tmpld);
990 tmpld = csinhl(tmpld);
991 tmpld = csqrtl(tmpld);
992 tmpld = ctanl(tmpld);
993 tmpld = ctanhl(tmpld);
994 tmpld = cpowl(tmpld, tmpld);
995 tmpld = cprojl(tmpld);
996 ], [glibcxx_cv_c99_complex_cxx98=yes], [glibcxx_cv_c99_complex_cxx98=no])
997 ])
998 fi
999 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx98)
1000 if test x"$glibcxx_cv_c99_complex_cxx98" = x"yes"; then
1001 AC_DEFINE(_GLIBCXX98_USE_C99_COMPLEX, 1,
1002 [Define if C99 functions in <complex.h> should be used in
1003 <complex> for C++98. Using compiler builtins for these functions
1004 requires corresponding C99 library functions to be present.])
1005 fi
1006
1007 # Check for the existence in <stdio.h> of vscanf, et. al.
1008 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++98])
1009 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx98, [
1010 GCC_TRY_COMPILE_OR_LINK(
1011 [#include <stdio.h>
1012 #include <stdarg.h>
1013 void foo(char* fmt, ...)
1014 {
1015 va_list args; va_start(args, fmt);
1016 vfscanf(stderr, "%i", args);
1017 vscanf("%i", args);
1018 vsnprintf(fmt, 0, "%i", args);
1019 vsscanf(fmt, "%i", args);
1020 snprintf(fmt, 0, "%i");
1021 }], [],
1022 [glibcxx_cv_c99_stdio_cxx98=yes], [glibcxx_cv_c99_stdio_cxx98=no])
757228f3 1023 ])
bdb62e6a 1024 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx98)
1025 if test x"$glibcxx_cv_c99_stdio_cxx98" = x"yes"; then
1026 AC_DEFINE(_GLIBCXX98_USE_C99_STDIO, 1,
1027 [Define if C99 functions or macros in <stdio.h> should be imported
1028 in <cstdio> in namespace std for C++98.])
1029 fi
757228f3 1030
f90d67e9 1031 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1032 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++98])
1033 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx98, [
1034 GCC_TRY_COMPILE_OR_LINK(
1035 [#include <stdlib.h>
1036 volatile float f;
1037 volatile long double ld;
1038 volatile unsigned long long ll;
1039 lldiv_t mydivt;],
1040 [char* tmp;
1041 f = strtof("gnu", &tmp);
1042 ld = strtold("gnu", &tmp);
1043 ll = strtoll("gnu", &tmp, 10);
1044 ll = strtoull("gnu", &tmp, 10);
1045 ll = llabs(10);
1046 mydivt = lldiv(10,1);
1047 ll = mydivt.quot;
1048 ll = mydivt.rem;
1049 ll = atoll("10");
1050 _Exit(0);
1051 ], [glibcxx_cv_c99_stdlib_cxx98=yes], [glibcxx_cv_c99_stdlib_cxx98=no])
1052 ])
1053 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx98)
1054 if test x"$glibcxx_cv_c99_stdlib_cxx98" = x"yes"; then
1055 AC_DEFINE(_GLIBCXX98_USE_C99_STDLIB, 1,
1056 [Define if C99 functions or macros in <stdlib.h> should be imported
1057 in <cstdlib> in namespace std for C++98.])
1058 fi
1059
bdb62e6a 1060 # Check for the existence in <wchar.h> of wcstold, etc.
1061 if test x"$ac_has_wchar_h" = xyes &&
1062 test x"$ac_has_wctype_h" = xyes; then
1063 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++98])
1064 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx98, [
1065 AC_TRY_COMPILE([#include <wchar.h>
1066 namespace test
1067 {
1068 using ::wcstold;
1069 using ::wcstoll;
1070 using ::wcstoull;
1071 }
1072 ], [], [glibcxx_cv_c99_wchar_cxx98=yes], [glibcxx_cv_c99_wchar_cxx98=no])
1073 ])
1074
1075 # Checks for wide character functions that may not be present.
1076 # Injection of these is wrapped with guard macros.
1077 # NB: only put functions here, instead of immediately above, if
1078 # absolutely necessary.
1079 AC_TRY_COMPILE([#include <wchar.h>
1080 namespace test { using ::vfwscanf; }], [],
1081 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1082
1083 AC_TRY_COMPILE([#include <wchar.h>
1084 namespace test { using ::vswscanf; }], [],
1085 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1086
1087 AC_TRY_COMPILE([#include <wchar.h>
1088 namespace test { using ::vwscanf; }], [],
1089 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1090
1091 AC_TRY_COMPILE([#include <wchar.h>
1092 namespace test { using ::wcstof; }], [],
1093 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1094
1095 AC_TRY_COMPILE([#include <wctype.h>],
1096 [wint_t t; int i = iswblank(t);],
1097 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1098
1099 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx98)
1100 if test x"$glibcxx_cv_c99_wchar_cxx98" = x"yes"; then
1101 AC_DEFINE(_GLIBCXX98_USE_C99_WCHAR, 1,
1102 [Define if C99 functions or macros in <wchar.h> should be imported
1103 in <cwchar> in namespace std for C++98.])
1104 fi
1105 fi
90d5bb42 1106
bdb62e6a 1107 # Option parsed, now set things appropriately.
1108 if test x"$glibcxx_cv_c99_math_cxx98" = x"no" ||
1109 test x"$glibcxx_cv_c99_complex_cxx98" = x"no" ||
1110 test x"$glibcxx_cv_c99_stdio_cxx98" = x"no" ||
1111 test x"$glibcxx_cv_c99_stdlib_cxx98" = x"no" ||
1112 test x"$glibcxx_cv_c99_wchar_cxx98" = x"no"; then
1113 enable_c99=no;
1114 else
1115 AC_DEFINE(_GLIBCXX_USE_C99, 1,
1116 [Define if C99 functions or macros from <wchar.h>, <math.h>,
1117 <complex.h>, <stdio.h>, and <stdlib.h> can be used or exposed.])
1118 fi
9253fc43 1119
bdb62e6a 1120 gcc_no_link="$ac_save_gcc_no_link"
1121 LIBS="$ac_save_LIBS"
1122 CXXFLAGS="$ac_save_CXXFLAGS"
1123 AC_LANG_RESTORE
1124
1125 AC_LANG_SAVE
1126 AC_LANG_CPLUSPLUS
1127
1128 # Use -std=c++11 and test again for C99 library feature in C++11 mode.
1129 # For the reasons given above we use -std=c++11 not -std=gnu++11.
1130 ac_save_CXXFLAGS="$CXXFLAGS"
1131 CXXFLAGS="$CXXFLAGS -std=c++11"
1132 ac_save_LIBS="$LIBS"
1133 ac_save_gcc_no_link="$gcc_no_link"
1134
1135 if test x$gcc_no_link != xyes; then
1136 # Use -fno-exceptions to that the C driver can link these tests without
1137 # hitting undefined references to personality routines.
1138 CXXFLAGS="$CXXFLAGS -fno-exceptions"
1139 AC_CHECK_LIB(m, sin, [LIBS="$LIBS -lm"], [
1140 # Use the default compile-only tests in GCC_TRY_COMPILE_OR_LINK
1141 gcc_no_link=yes
1142 ])
1143 fi
68224f8d 1144
bdb62e6a 1145 # Check for the existence of <math.h> functions used if C99 is enabled.
1146 AC_MSG_CHECKING([for ISO C99 support in <math.h> for C++11])
1147 AC_CACHE_VAL(glibcxx_cv_c99_math_cxx11, [
1148 GCC_TRY_COMPILE_OR_LINK(
1149 [#include <math.h>
1150 volatile double d1, d2;
1151 volatile int i;],
1152 [i = fpclassify(d1);
1153 i = isfinite(d1);
1154 i = isinf(d1);
1155 i = isnan(d1);
1156 i = isnormal(d1);
1157 i = signbit(d1);
1158 i = isgreater(d1, d2);
1159 i = isgreaterequal(d1, d2);
1160 i = isless(d1, d2);
1161 i = islessequal(d1, d2);
1162 i = islessgreater(d1, d2);
1163 i = islessgreater(d1, d2);
1164 i = isunordered(d1, d2);
1165 ], [glibcxx_cv_c99_math_cxx11=yes], [glibcxx_cv_c99_math_cxx11=no])
1166 ])
1167 AC_MSG_RESULT($glibcxx_cv_c99_math_cxx11)
1168 if test x"$glibcxx_cv_c99_math_cxx11" = x"yes"; then
1169 AC_DEFINE(_GLIBCXX11_USE_C99_MATH, 1,
1170 [Define if C99 functions or macros in <math.h> should be imported
1171 in <cmath> in namespace std for C++11.])
1172 fi
68224f8d 1173
bdb62e6a 1174 # Check for the existence of <complex.h> complex math functions.
1175 # This is necessary even though libstdc++ uses the builtin versions
1176 # of these functions, because if the builtin cannot be used, a reference
1177 # to the library function is emitted.
1178 AC_CHECK_HEADERS(tgmath.h, ac_has_tgmath_h=yes, ac_has_tgmath_h=no)
1179 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1180 if test x"$ac_has_complex_h" = x"yes"; then
1181 AC_MSG_CHECKING([for ISO C99 support in <complex.h> for C++11])
1182 AC_CACHE_VAL(glibcxx_cv_c99_complex_cxx11, [
1183 GCC_TRY_COMPILE_OR_LINK(
1184 [#include <complex.h>
1185 typedef __complex__ float float_type;
1186 typedef __complex__ double double_type;
1187 typedef __complex__ long double ld_type;
1188 volatile float_type tmpf;
1189 volatile double_type tmpd;
1190 volatile ld_type tmpld;
1191 volatile float f;
1192 volatile double d;
1193 volatile long double ld;],
1194 [f = cabsf(tmpf);
1195 f = cargf(tmpf);
1196 tmpf = ccosf(tmpf);
1197 tmpf = ccoshf(tmpf);
1198 tmpf = cexpf(tmpf);
1199 tmpf = clogf(tmpf);
1200 tmpf = csinf(tmpf);
1201 tmpf = csinhf(tmpf);
1202 tmpf = csqrtf(tmpf);
1203 tmpf = ctanf(tmpf);
1204 tmpf = ctanhf(tmpf);
1205 tmpf = cpowf(tmpf, tmpf);
1206 tmpf = cprojf(tmpf);
1207 d = cabs(tmpd);
1208 d = carg(tmpd);
1209 tmpd = ccos(tmpd);
1210 tmpd = ccosh(tmpd);
1211 tmpd = cexp(tmpd);
1212 tmpd = clog(tmpd);
1213 tmpd = csin(tmpd);
1214 tmpd = csinh(tmpd);
1215 tmpd = csqrt(tmpd);
1216 tmpd = ctan(tmpd);
1217 tmpd = ctanh(tmpd);
1218 tmpd = cpow(tmpd, tmpd);
1219 tmpd = cproj(tmpd);
1220 ld = cabsl(tmpld);
1221 ld = cargl(tmpld);
1222 tmpld = ccosl(tmpld);
1223 tmpld = ccoshl(tmpld);
1224 tmpld = cexpl(tmpld);
1225 tmpld = clogl(tmpld);
1226 tmpld = csinl(tmpld);
1227 tmpld = csinhl(tmpld);
1228 tmpld = csqrtl(tmpld);
1229 tmpld = ctanl(tmpld);
1230 tmpld = ctanhl(tmpld);
1231 tmpld = cpowl(tmpld, tmpld);
1232 tmpld = cprojl(tmpld);
1233 ], [glibcxx_cv_c99_complex_cxx11=yes], [glibcxx_cv_c99_complex_cxx11=no])
1234 ])
1235 fi
1236 AC_MSG_RESULT($glibcxx_cv_c99_complex_cxx11)
1237 if test x"$glibcxx_cv_c99_complex_cxx11" = x"yes"; then
1238 AC_DEFINE(_GLIBCXX11_USE_C99_COMPLEX, 1,
1239 [Define if C99 functions in <complex.h> should be used in
1240 <complex> for C++11. Using compiler builtins for these functions
1241 requires corresponding C99 library functions to be present.])
1242 fi
1243
1244 # Check for the existence in <stdio.h> of vscanf, et. al.
1245 AC_MSG_CHECKING([for ISO C99 support in <stdio.h> for C++11])
1246 AC_CACHE_VAL(glibcxx_cv_c99_stdio_cxx11, [
1247 GCC_TRY_COMPILE_OR_LINK(
1248 [#include <stdio.h>
1249 #include <stdarg.h>
1250 void foo(char* fmt, ...)
1251 {
1252 va_list args; va_start(args, fmt);
1253 vfscanf(stderr, "%i", args);
1254 vscanf("%i", args);
1255 vsnprintf(fmt, 0, "%i", args);
1256 vsscanf(fmt, "%i", args);
1257 snprintf(fmt, 0, "%i");
1258 }], [],
1259 [glibcxx_cv_c99_stdio_cxx11=yes], [glibcxx_cv_c99_stdio_cxx11=no])
1260 ])
1261 AC_MSG_RESULT($glibcxx_cv_c99_stdio_cxx11)
1262 if test x"$glibcxx_cv_c99_stdio_cxx11" = x"yes"; then
1263 AC_DEFINE(_GLIBCXX11_USE_C99_STDIO, 1,
1264 [Define if C99 functions or macros in <stdio.h> should be imported
1265 in <cstdio> in namespace std for C++11.])
1266 fi
1267
1268 # Check for the existence in <stdlib.h> of lldiv_t, et. al.
1269 AC_MSG_CHECKING([for ISO C99 support in <stdlib.h> for C++11])
1270 AC_CACHE_VAL(glibcxx_cv_c99_stdlib_cxx11, [
1271 GCC_TRY_COMPILE_OR_LINK(
1272 [#include <stdlib.h>
1273 volatile float f;
1274 volatile long double ld;
1275 volatile unsigned long long ll;
1276 lldiv_t mydivt;],
1277 [char* tmp;
1278 f = strtof("gnu", &tmp);
1279 ld = strtold("gnu", &tmp);
1280 ll = strtoll("gnu", &tmp, 10);
1281 ll = strtoull("gnu", &tmp, 10);
1282 ll = llabs(10);
1283 mydivt = lldiv(10,1);
1284 ll = mydivt.quot;
1285 ll = mydivt.rem;
1286 ll = atoll("10");
1287 _Exit(0);
1288 ], [glibcxx_cv_c99_stdlib_cxx11=yes], [glibcxx_cv_c99_stdlib_cxx11=no])
1289 ])
1290 AC_MSG_RESULT($glibcxx_cv_c99_stdlib_cxx11)
1291 if test x"$glibcxx_cv_c99_stdlib_cxx11" = x"yes"; then
1292 AC_DEFINE(_GLIBCXX11_USE_C99_STDLIB, 1,
1293 [Define if C99 functions or macros in <stdlib.h> should be imported
1294 in <cstdlib> in namespace std for C++11.])
1295 fi
1296
1297 # Check for the existence in <wchar.h> of wcstold, etc.
1298 if test x"$ac_has_wchar_h" = xyes &&
1299 test x"$ac_has_wctype_h" = xyes; then
1300 AC_MSG_CHECKING([for ISO C99 support in <wchar.h> for C++11])
1301 AC_CACHE_VAL(glibcxx_cv_c99_wchar_cxx11, [
1302 AC_TRY_COMPILE([#include <wchar.h>
1303 namespace test
1304 {
1305 using ::wcstold;
1306 using ::wcstoll;
1307 using ::wcstoull;
1308 }
1309 ], [], [glibcxx_cv_c99_wchar_cxx11=yes], [glibcxx_cv_c99_wchar_cxx11=no])
1310 ])
1311
1312 # Checks for wide character functions that may not be present.
1313 # Injection of these is wrapped with guard macros.
1314 # NB: only put functions here, instead of immediately above, if
1315 # absolutely necessary.
1316 AC_TRY_COMPILE([#include <wchar.h>
1317 namespace test { using ::vfwscanf; }], [],
1318 [AC_DEFINE(HAVE_VFWSCANF, 1, [Defined if vfwscanf exists.])], [])
1319
1320 AC_TRY_COMPILE([#include <wchar.h>
1321 namespace test { using ::vswscanf; }], [],
1322 [AC_DEFINE(HAVE_VSWSCANF, 1, [Defined if vswscanf exists.])], [])
1323
1324 AC_TRY_COMPILE([#include <wchar.h>
1325 namespace test { using ::vwscanf; }], [],
1326 [AC_DEFINE(HAVE_VWSCANF, 1, [Defined if vwscanf exists.])], [])
1327
1328 AC_TRY_COMPILE([#include <wchar.h>
1329 namespace test { using ::wcstof; }], [],
1330 [AC_DEFINE(HAVE_WCSTOF, 1, [Defined if wcstof exists.])], [])
1331
1332 AC_TRY_COMPILE([#include <wctype.h>],
1333 [wint_t t; int i = iswblank(t);],
1334 [AC_DEFINE(HAVE_ISWBLANK, 1, [Defined if iswblank exists.])], [])
1335
1336 AC_MSG_RESULT($glibcxx_cv_c99_wchar_cxx11)
1337 if test x"$glibcxx_cv_c99_wchar_cxx11" = x"yes"; then
1338 AC_DEFINE(_GLIBCXX11_USE_C99_WCHAR, 1,
1339 [Define if C99 functions or macros in <wchar.h> should be imported
1340 in <cwchar> in namespace std for C++11.])
1341 fi
1342 fi
1343
1344 gcc_no_link="$ac_save_gcc_no_link"
1345 LIBS="$ac_save_LIBS"
1346 CXXFLAGS="$ac_save_CXXFLAGS"
1347 AC_LANG_RESTORE
dca89719 1348 fi
c586733c 1349
1350 AC_MSG_CHECKING([for fully enabled ISO C99 support])
1351 AC_MSG_RESULT($enable_c99)
401f263f 1352])
1353
1354
4971b9a8 1355dnl
99e43922 1356dnl Check for clock_gettime, nanosleep and sched_yield, used in the
f1ff5c18 1357dnl implementation of 20.11.7 [time.clock], and 30.3.2 [thread.thread.this]
1358dnl in the C++11 standard.
4971b9a8 1359dnl
99e43922 1360dnl --enable-libstdcxx-time
1361dnl --enable-libstdcxx-time=yes
1362dnl checks for the availability of monotonic and realtime clocks,
f1ff5c18 1363dnl nanosleep and sched_yield in libc and libposix4 and, if needed,
1364dnl links in the latter.
99e43922 1365dnl --enable-libstdcxx-time=rt
f1ff5c18 1366dnl also searches (and, if needed, links) librt. Note that this is
2da704e6 1367dnl not always desirable because, in glibc 2.16 and earlier, for
1368dnl example, in turn it triggers the linking of libpthread too,
1369dnl which activates locking,
82af6a35 1370dnl a large overhead for single-thread programs.
99e43922 1371dnl --enable-libstdcxx-time=no
1372dnl --disable-libstdcxx-time
d6182d17 1373dnl disables the checks completely
1374dnl
5b2ebdb8 1375dnl N.B. Darwin provides nanosleep but doesn't support the whole POSIX
1376dnl Timers option, so doesn't define _POSIX_TIMERS. Because the test
1377dnl below fails Darwin unconditionally defines _GLIBCXX_USE_NANOSLEEP in
1378dnl os_defines.h and also defines _GLIBCXX_USE_SCHED_YIELD.
1379dnl
99e43922 1380AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
d6182d17 1381
2da704e6 1382 GLIBCXX_ENABLE(libstdcxx-time,auto,[[[=KIND]]],
d6182d17 1383 [use KIND for check type],
1384 [permit yes|no|rt])
4971b9a8 1385
1386 AC_LANG_SAVE
1387 AC_LANG_CPLUSPLUS
1388 ac_save_CXXFLAGS="$CXXFLAGS"
1389 CXXFLAGS="$CXXFLAGS -fno-exceptions"
ad3e2295 1390 ac_save_LIBS="$LIBS"
1391
ad7af939 1392 ac_has_clock_monotonic=no
1393 ac_has_clock_realtime=no
2da704e6 1394 ac_has_nanosleep=no
1395 ac_has_sched_yield=no
1396
1397 if test x"$enable_libstdcxx_time" = x"auto"; then
1398
1399 case "${target_os}" in
1400 cygwin*)
1401 ac_has_nanosleep=yes
1402 ;;
1403 darwin*)
1404 ac_has_nanosleep=yes
1405 ac_has_sched_yield=yes
1406 ;;
1407 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
1408 AC_MSG_CHECKING([for at least GNU libc 2.17])
1409 AC_TRY_COMPILE(
1410 [#include <features.h>],
1411 [
1412 #if ! __GLIBC_PREREQ(2, 17)
1413 #error
1414 #endif
1415 ],
1416 [glibcxx_glibc217=yes], [glibcxx_glibc217=no])
1417 AC_MSG_RESULT($glibcxx_glibc217)
1418
1419 if test x"$glibcxx_glibc217" = x"yes"; then
1420 ac_has_clock_monotonic=yes
1421 ac_has_clock_realtime=yes
1422 fi
1423 ac_has_nanosleep=yes
1424 ac_has_sched_yield=yes
1425 ;;
9de62d25 1426 freebsd*|netbsd*|dragonfly*|rtems*)
2da704e6 1427 ac_has_clock_monotonic=yes
1428 ac_has_clock_realtime=yes
1429 ac_has_nanosleep=yes
1430 ac_has_sched_yield=yes
1431 ;;
1432 openbsd*)
1433 ac_has_clock_monotonic=yes
1434 ac_has_clock_realtime=yes
1435 ac_has_nanosleep=yes
1436 ;;
1437 solaris*)
1438 GLIBCXX_LIBS="$GLIBCXX_LIBS -lrt"
1439 ac_has_clock_monotonic=yes
1440 ac_has_clock_realtime=yes
1441 ac_has_nanosleep=yes
1442 ac_has_sched_yield=yes
1443 ;;
1444 esac
ad3e2295 1445
2da704e6 1446 elif test x"$enable_libstdcxx_time" != x"no"; then
ad3e2295 1447
99e43922 1448 if test x"$enable_libstdcxx_time" = x"rt"; then
d6182d17 1449 AC_SEARCH_LIBS(clock_gettime, [rt posix4])
99e43922 1450 AC_SEARCH_LIBS(nanosleep, [rt posix4])
d6182d17 1451 else
1452 AC_SEARCH_LIBS(clock_gettime, [posix4])
99e43922 1453 AC_SEARCH_LIBS(nanosleep, [posix4])
d6182d17 1454 fi
1455
1456 case "$ac_cv_search_clock_gettime" in
1457 -l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
99e43922 1458 ;;
1459 esac
1460 case "$ac_cv_search_nanosleep" in
1461 -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
1462 ;;
1463 esac
1464
1465 AC_SEARCH_LIBS(sched_yield, [rt posix4])
1466
1467 case "$ac_cv_search_sched_yield" in
1468 -lposix4*)
1469 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
2da704e6 1470 ac_has_sched_yield=yes
99e43922 1471 ;;
1472 -lrt*)
1473 if test x"$enable_libstdcxx_time" = x"rt"; then
dca89719 1474 GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
2da704e6 1475 ac_has_sched_yield=yes
99e43922 1476 fi
1477 ;;
1478 *)
2da704e6 1479 ac_has_sched_yield=yes
99e43922 1480 ;;
d6182d17 1481 esac
1482
1483 AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
1484
1485 if test x"$ac_has_unistd_h" = x"yes"; then
1486 AC_MSG_CHECKING([for monotonic clock])
1487 AC_TRY_LINK(
dca89719 1488 [#include <unistd.h>
1489 #include <time.h>
1490 ],
1491 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1492 timespec tp;
1493 #endif
1494 clock_gettime(CLOCK_MONOTONIC, &tp);
1495 ], [ac_has_clock_monotonic=yes], [ac_has_clock_monotonic=no])
1496
1497 AC_MSG_RESULT($ac_has_clock_monotonic)
1498
d6182d17 1499 AC_MSG_CHECKING([for realtime clock])
1500 AC_TRY_LINK(
dca89719 1501 [#include <unistd.h>
1502 #include <time.h>
1503 ],
1504 [#if _POSIX_TIMERS > 0
1505 timespec tp;
1506 #endif
1507 clock_gettime(CLOCK_REALTIME, &tp);
1508 ], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
d6182d17 1509
1510 AC_MSG_RESULT($ac_has_clock_realtime)
d6182d17 1511
99e43922 1512 AC_MSG_CHECKING([for nanosleep])
1513 AC_TRY_LINK(
dca89719 1514 [#include <unistd.h>
1515 #include <time.h>
1516 ],
1517 [#if _POSIX_TIMERS > 0
1518 timespec tp;
1519 #endif
1520 nanosleep(&tp, 0);
1521 ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
99e43922 1522
1523 AC_MSG_RESULT($ac_has_nanosleep)
1524 fi
d6182d17 1525 fi
1526
bcc6e6bf 1527 if test x"$ac_has_clock_monotonic" != x"yes"; then
1528 case ${target_os} in
1529 linux*)
1530 AC_MSG_CHECKING([for clock_gettime syscall])
1531 AC_TRY_COMPILE(
1532 [#include <unistd.h>
1533 #include <time.h>
1534 #include <sys/syscall.h>
1535 ],
1536 [#if _POSIX_TIMERS > 0 && defined(_POSIX_MONOTONIC_CLOCK)
1537 timespec tp;
1538 #endif
1539 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp);
1540 syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
1541 ], [ac_has_clock_monotonic_syscall=yes], [ac_has_clock_monotonic_syscall=no])
1542 AC_MSG_RESULT($ac_has_clock_monotonic_syscall)
1543 if test x"$ac_has_clock_monotonic_syscall" = x"yes"; then
1544 AC_DEFINE(_GLIBCXX_USE_CLOCK_GETTIME_SYSCALL, 1,
1545 [ Defined if clock_gettime syscall has monotonic and realtime clock support. ])
1546 ac_has_clock_monotonic=yes
1547 ac_has_clock_realtime=yes
1548 fi;;
1549 esac
1550 fi
1551
4971b9a8 1552 if test x"$ac_has_clock_monotonic" = x"yes"; then
1553 AC_DEFINE(_GLIBCXX_USE_CLOCK_MONOTONIC, 1,
1554 [ Defined if clock_gettime has monotonic clock support. ])
1555 fi
ad3e2295 1556
4971b9a8 1557 if test x"$ac_has_clock_realtime" = x"yes"; then
1558 AC_DEFINE(_GLIBCXX_USE_CLOCK_REALTIME, 1,
1559 [ Defined if clock_gettime has realtime clock support. ])
1560 fi
ad3e2295 1561
2da704e6 1562 if test x"$ac_has_sched_yield" = x"yes"; then
1563 AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
1564 [ Defined if sched_yield is available. ])
1565 fi
1566
99e43922 1567 if test x"$ac_has_nanosleep" = x"yes"; then
1568 AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
1569 [ Defined if nanosleep is available. ])
a2bb721d 1570 else
1571 AC_MSG_CHECKING([for sleep])
1572 AC_TRY_COMPILE([#include <unistd.h>],
1573 [sleep(1)],
1574 [ac_has_sleep=yes],[ac_has_sleep=no])
1575 if test x"$ac_has_sleep" = x"yes"; then
1576 AC_DEFINE(HAVE_SLEEP,1, [Defined if sleep exists.])
1577 fi
1578 AC_MSG_RESULT($ac_has_sleep)
1579 AC_MSG_CHECKING([for usleep])
1580 AC_TRY_COMPILE([#include <unistd.h>],
1581 [sleep(1);
1582 usleep(100);],
1583 [ac_has_usleep=yes],[ac_has_usleep=no])
1584 if test x"$ac_has_usleep" = x"yes"; then
1585 AC_DEFINE(HAVE_USLEEP,1, [Defined if usleep exists.])
1586 fi
1587 AC_MSG_RESULT($ac_has_usleep)
99e43922 1588 fi
1589
bd83c8ab 1590 if test x"$ac_has_nanosleep$ac_has_sleep" = x"nono"; then
1591 AC_MSG_CHECKING([for Sleep])
1592 AC_TRY_COMPILE([#include <windows.h>],
1593 [Sleep(1)],
1594 [ac_has_win32_sleep=yes],[ac_has_win32_sleep=no])
1595 if test x"$ac_has_win32_sleep" = x"yes"; then
1596 AC_DEFINE(HAVE_WIN32_SLEEP,1, [Defined if Sleep exists.])
1597 fi
1598 AC_MSG_RESULT($ac_has_win32_sleep)
1599 fi
1600
ad3e2295 1601 AC_SUBST(GLIBCXX_LIBS)
1602
4971b9a8 1603 CXXFLAGS="$ac_save_CXXFLAGS"
ad3e2295 1604 LIBS="$ac_save_LIBS"
4971b9a8 1605 AC_LANG_RESTORE
1606])
1607
1608dnl
f1ff5c18 1609dnl Check for gettimeofday, used in the implementation of 20.11.7
1610dnl [time.clock] in the C++11 standard.
4971b9a8 1611dnl
1612AC_DEFUN([GLIBCXX_CHECK_GETTIMEOFDAY], [
dca89719 1613
d6182d17 1614 AC_MSG_CHECKING([for gettimeofday])
1615
4971b9a8 1616 AC_LANG_SAVE
1617 AC_LANG_CPLUSPLUS
1618 ac_save_CXXFLAGS="$CXXFLAGS"
1619 CXXFLAGS="$CXXFLAGS -fno-exceptions"
dca89719 1620
4971b9a8 1621 ac_has_gettimeofday=no;
1622 AC_CHECK_HEADERS(sys/time.h, ac_has_sys_time_h=yes, ac_has_sys_time_h=no)
1623 if test x"$ac_has_sys_time_h" = x"yes"; then
1624 AC_MSG_CHECKING([for gettimeofday])
d6182d17 1625 GCC_TRY_COMPILE_OR_LINK([#include <sys/time.h>],
4971b9a8 1626 [timeval tv; gettimeofday(&tv, 0);],
1627 [ac_has_gettimeofday=yes], [ac_has_gettimeofday=no])
dca89719 1628
4971b9a8 1629 AC_MSG_RESULT($ac_has_gettimeofday)
1630 fi
dca89719 1631
4971b9a8 1632 if test x"$ac_has_gettimeofday" = x"yes"; then
1633 AC_DEFINE(_GLIBCXX_USE_GETTIMEOFDAY, 1,
1634 [ Defined if gettimeofday is available. ])
1635 fi
dca89719 1636
4971b9a8 1637 CXXFLAGS="$ac_save_CXXFLAGS"
1638 AC_LANG_RESTORE
1639])
1640
d04e5f88 1641dnl
1642dnl Check for ISO/IEC 9899:1999 "C99" support to ISO/IEC DTR 19768 "TR1"
1643dnl facilities in Chapter 8, "C compatibility".
1644dnl
1645AC_DEFUN([GLIBCXX_CHECK_C99_TR1], [
1646
1647 AC_LANG_SAVE
1648 AC_LANG_CPLUSPLUS
1649
91f76f05 1650 # Use -std=c++98 because the default (-std=gnu++98) leaves __STRICT_ANSI__
1651 # undefined and fake C99 facilities may be spuriously enabled.
1652 ac_save_CXXFLAGS="$CXXFLAGS"
1653 CXXFLAGS="$CXXFLAGS -std=c++98"
1654
d04e5f88 1655 # Check for the existence of <complex.h> complex math functions used
1656 # by tr1/complex.
1657 AC_CHECK_HEADERS(complex.h, ac_has_complex_h=yes, ac_has_complex_h=no)
1658 ac_c99_complex_tr1=no;
1659 if test x"$ac_has_complex_h" = x"yes"; then
1660 AC_MSG_CHECKING([for ISO C99 support to TR1 in <complex.h>])
1661 AC_TRY_COMPILE([#include <complex.h>],
dca89719 1662 [typedef __complex__ float float_type; float_type tmpf;
1663 cacosf(tmpf);
1664 casinf(tmpf);
1665 catanf(tmpf);
1666 cacoshf(tmpf);
1667 casinhf(tmpf);
1668 catanhf(tmpf);
d04e5f88 1669 typedef __complex__ double double_type; double_type tmpd;
dca89719 1670 cacos(tmpd);
1671 casin(tmpd);
1672 catan(tmpd);
1673 cacosh(tmpd);
1674 casinh(tmpd);
1675 catanh(tmpd);
d04e5f88 1676 typedef __complex__ long double ld_type; ld_type tmpld;
dca89719 1677 cacosl(tmpld);
1678 casinl(tmpld);
1679 catanl(tmpld);
1680 cacoshl(tmpld);
1681 casinhl(tmpld);
1682 catanhl(tmpld);
d04e5f88 1683 ],[ac_c99_complex_tr1=yes], [ac_c99_complex_tr1=no])
1684 fi
1685 AC_MSG_RESULT($ac_c99_complex_tr1)
1686 if test x"$ac_c99_complex_tr1" = x"yes"; then
1687 AC_DEFINE(_GLIBCXX_USE_C99_COMPLEX_TR1, 1,
dca89719 1688 [Define if C99 functions in <complex.h> should be used in
1689 <tr1/complex>. Using compiler builtins for these functions
d04e5f88 1690 requires corresponding C99 library functions to be present.])
1691 fi
1692
1693 # Check for the existence of <ctype.h> functions.
1694 AC_MSG_CHECKING([for ISO C99 support to TR1 in <ctype.h>])
6992582a 1695 AC_CACHE_VAL(glibcxx_cv_c99_ctype_tr1, [
d04e5f88 1696 AC_TRY_COMPILE([#include <ctype.h>],
dca89719 1697 [int ch;
1698 int ret;
1699 ret = isblank(ch);
fcbe9d5c 1700 ],[glibcxx_cv_c99_ctype_tr1=yes],
1701 [glibcxx_cv_c99_ctype_tr1=no])
d04e5f88 1702 ])
6992582a 1703 AC_MSG_RESULT($glibcxx_cv_c99_ctype_tr1)
1704 if test x"$glibcxx_cv_c99_ctype_tr1" = x"yes"; then
d04e5f88 1705 AC_DEFINE(_GLIBCXX_USE_C99_CTYPE_TR1, 1,
dca89719 1706 [Define if C99 functions in <ctype.h> should be imported in
d04e5f88 1707 <tr1/cctype> in namespace std::tr1.])
1708 fi
1709
1068b7db 1710 # Check for the existence of <fenv.h> functions.
1711 AC_CHECK_HEADERS(fenv.h, ac_has_fenv_h=yes, ac_has_fenv_h=no)
1712 ac_c99_fenv_tr1=no;
1713 if test x"$ac_has_fenv_h" = x"yes"; then
1714 AC_MSG_CHECKING([for ISO C99 support to TR1 in <fenv.h>])
1715 AC_TRY_COMPILE([#include <fenv.h>],
dca89719 1716 [int except, mode;
1717 fexcept_t* pflag;
1718 fenv_t* penv;
1719 int ret;
1720 ret = feclearexcept(except);
1721 ret = fegetexceptflag(pflag, except);
1722 ret = feraiseexcept(except);
1723 ret = fesetexceptflag(pflag, except);
1724 ret = fetestexcept(except);
1725 ret = fegetround();
1726 ret = fesetround(mode);
1727 ret = fegetenv(penv);
1728 ret = feholdexcept(penv);
1729 ret = fesetenv(penv);
1730 ret = feupdateenv(penv);
1068b7db 1731 ],[ac_c99_fenv_tr1=yes], [ac_c99_fenv_tr1=no])
1732 fi
1733 AC_MSG_RESULT($ac_c99_fenv_tr1)
1734 if test x"$ac_c99_fenv_tr1" = x"yes"; then
1735 AC_DEFINE(_GLIBCXX_USE_C99_FENV_TR1, 1,
dca89719 1736 [Define if C99 functions in <fenv.h> should be imported in
1068b7db 1737 <tr1/cfenv> in namespace std::tr1.])
1738 fi
1739
14dd354c 1740 # Check for the existence of <stdint.h> types.
1741 AC_MSG_CHECKING([for ISO C99 support to TR1 in <stdint.h>])
6992582a 1742 AC_CACHE_VAL(glibcxx_cv_c99_stdint_tr1, [
b12cc7df 1743 AC_TRY_COMPILE([#define __STDC_LIMIT_MACROS
dca89719 1744 #define __STDC_CONSTANT_MACROS
1745 #include <stdint.h>],
1746 [typedef int8_t my_int8_t;
b12cc7df 1747 my_int8_t i8 = INT8_MIN;
1748 i8 = INT8_MAX;
dca89719 1749 typedef int16_t my_int16_t;
b12cc7df 1750 my_int16_t i16 = INT16_MIN;
1751 i16 = INT16_MAX;
dca89719 1752 typedef int32_t my_int32_t;
b12cc7df 1753 my_int32_t i32 = INT32_MIN;
1754 i32 = INT32_MAX;
dca89719 1755 typedef int64_t my_int64_t;
b12cc7df 1756 my_int64_t i64 = INT64_MIN;
1757 i64 = INT64_MAX;
dca89719 1758 typedef int_fast8_t my_int_fast8_t;
b12cc7df 1759 my_int_fast8_t if8 = INT_FAST8_MIN;
1760 if8 = INT_FAST8_MAX;
dca89719 1761 typedef int_fast16_t my_int_fast16_t;
b12cc7df 1762 my_int_fast16_t if16 = INT_FAST16_MIN;
1763 if16 = INT_FAST16_MAX;
dca89719 1764 typedef int_fast32_t my_int_fast32_t;
b12cc7df 1765 my_int_fast32_t if32 = INT_FAST32_MIN;
1766 if32 = INT_FAST32_MAX;
dca89719 1767 typedef int_fast64_t my_int_fast64_t;
b12cc7df 1768 my_int_fast64_t if64 = INT_FAST64_MIN;
1769 if64 = INT_FAST64_MAX;
dca89719 1770 typedef int_least8_t my_int_least8_t;
b12cc7df 1771 my_int_least8_t il8 = INT_LEAST8_MIN;
1772 il8 = INT_LEAST8_MAX;
dca89719 1773 typedef int_least16_t my_int_least16_t;
b12cc7df 1774 my_int_least16_t il16 = INT_LEAST16_MIN;
1775 il16 = INT_LEAST16_MAX;
dca89719 1776 typedef int_least32_t my_int_least32_t;
b12cc7df 1777 my_int_least32_t il32 = INT_LEAST32_MIN;
1778 il32 = INT_LEAST32_MAX;
dca89719 1779 typedef int_least64_t my_int_least64_t;
b12cc7df 1780 my_int_least64_t il64 = INT_LEAST64_MIN;
1781 il64 = INT_LEAST64_MAX;
14dd354c 1782 typedef intmax_t my_intmax_t;
b12cc7df 1783 my_intmax_t im = INTMAX_MAX;
1784 im = INTMAX_MIN;
14dd354c 1785 typedef intptr_t my_intptr_t;
b12cc7df 1786 my_intptr_t ip = INTPTR_MAX;
1787 ip = INTPTR_MIN;
dca89719 1788 typedef uint8_t my_uint8_t;
b12cc7df 1789 my_uint8_t ui8 = UINT8_MAX;
1790 ui8 = UINT8_MAX;
dca89719 1791 typedef uint16_t my_uint16_t;
b12cc7df 1792 my_uint16_t ui16 = UINT16_MAX;
1793 ui16 = UINT16_MAX;
dca89719 1794 typedef uint32_t my_uint32_t;
b12cc7df 1795 my_uint32_t ui32 = UINT32_MAX;
1796 ui32 = UINT32_MAX;
dca89719 1797 typedef uint64_t my_uint64_t;
b12cc7df 1798 my_uint64_t ui64 = UINT64_MAX;
1799 ui64 = UINT64_MAX;
dca89719 1800 typedef uint_fast8_t my_uint_fast8_t;
b12cc7df 1801 my_uint_fast8_t uif8 = UINT_FAST8_MAX;
1802 uif8 = UINT_FAST8_MAX;
dca89719 1803 typedef uint_fast16_t my_uint_fast16_t;
b12cc7df 1804 my_uint_fast16_t uif16 = UINT_FAST16_MAX;
1805 uif16 = UINT_FAST16_MAX;
dca89719 1806 typedef uint_fast32_t my_uint_fast32_t;
b12cc7df 1807 my_uint_fast32_t uif32 = UINT_FAST32_MAX;
1808 uif32 = UINT_FAST32_MAX;
dca89719 1809 typedef uint_fast64_t my_uint_fast64_t;
b12cc7df 1810 my_uint_fast64_t uif64 = UINT_FAST64_MAX;
1811 uif64 = UINT_FAST64_MAX;
dca89719 1812 typedef uint_least8_t my_uint_least8_t;
b12cc7df 1813 my_uint_least8_t uil8 = UINT_LEAST8_MAX;
1814 uil8 = UINT_LEAST8_MAX;
dca89719 1815 typedef uint_least16_t my_uint_least16_t;
b12cc7df 1816 my_uint_least16_t uil16 = UINT_LEAST16_MAX;
1817 uil16 = UINT_LEAST16_MAX;
dca89719 1818 typedef uint_least32_t my_uint_least32_t;
b12cc7df 1819 my_uint_least32_t uil32 = UINT_LEAST32_MAX;
1820 uil32 = UINT_LEAST32_MAX;
dca89719 1821 typedef uint_least64_t my_uint_least64_t;
b12cc7df 1822 my_uint_least64_t uil64 = UINT_LEAST64_MAX;
1823 uil64 = UINT_LEAST64_MAX;
14dd354c 1824 typedef uintmax_t my_uintmax_t;
b12cc7df 1825 my_uintmax_t uim = UINTMAX_MAX;
1826 uim = UINTMAX_MAX;
14dd354c 1827 typedef uintptr_t my_uintptr_t;
b12cc7df 1828 my_uintptr_t uip = UINTPTR_MAX;
1829 uip = UINTPTR_MAX;
fcbe9d5c 1830 ],[glibcxx_cv_c99_stdint_tr1=yes],
1831 [glibcxx_cv_c99_stdint_tr1=no])
14dd354c 1832 ])
6992582a 1833 AC_MSG_RESULT($glibcxx_cv_c99_stdint_tr1)
1834 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
14dd354c 1835 AC_DEFINE(_GLIBCXX_USE_C99_STDINT_TR1, 1,
dca89719 1836 [Define if C99 types in <stdint.h> should be imported in
14dd354c 1837 <tr1/cstdint> in namespace std::tr1.])
1838 fi
1839
bc4c9cb8 1840 # Check for the existence of <math.h> functions.
1841 AC_MSG_CHECKING([for ISO C99 support to TR1 in <math.h>])
6992582a 1842 AC_CACHE_VAL(glibcxx_cv_c99_math_tr1, [
bc4c9cb8 1843 AC_TRY_COMPILE([#include <math.h>],
dca89719 1844 [typedef double_t my_double_t;
1845 typedef float_t my_float_t;
1846 acosh(0.0);
1847 acoshf(0.0f);
1848 acoshl(0.0l);
1849 asinh(0.0);
1850 asinhf(0.0f);
1851 asinhl(0.0l);
1852 atanh(0.0);
1853 atanhf(0.0f);
1854 atanhl(0.0l);
1855 cbrt(0.0);
1856 cbrtf(0.0f);
1857 cbrtl(0.0l);
1858 copysign(0.0, 0.0);
1859 copysignf(0.0f, 0.0f);
1860 copysignl(0.0l, 0.0l);
1861 erf(0.0);
1862 erff(0.0f);
1863 erfl(0.0l);
1864 erfc(0.0);
1865 erfcf(0.0f);
1866 erfcl(0.0l);
1867 exp2(0.0);
1868 exp2f(0.0f);
1869 exp2l(0.0l);
1870 expm1(0.0);
1871 expm1f(0.0f);
1872 expm1l(0.0l);
1873 fdim(0.0, 0.0);
1874 fdimf(0.0f, 0.0f);
1875 fdiml(0.0l, 0.0l);
1876 fma(0.0, 0.0, 0.0);
1877 fmaf(0.0f, 0.0f, 0.0f);
1878 fmal(0.0l, 0.0l, 0.0l);
1879 fmax(0.0, 0.0);
1880 fmaxf(0.0f, 0.0f);
1881 fmaxl(0.0l, 0.0l);
1882 fmin(0.0, 0.0);
1883 fminf(0.0f, 0.0f);
1884 fminl(0.0l, 0.0l);
1885 hypot(0.0, 0.0);
1886 hypotf(0.0f, 0.0f);
1887 hypotl(0.0l, 0.0l);
1888 ilogb(0.0);
1889 ilogbf(0.0f);
1890 ilogbl(0.0l);
1891 lgamma(0.0);
1892 lgammaf(0.0f);
1893 lgammal(0.0l);
638579da 1894 #ifndef __APPLE__ /* see below */
dca89719 1895 llrint(0.0);
1896 llrintf(0.0f);
1897 llrintl(0.0l);
1898 llround(0.0);
1899 llroundf(0.0f);
1900 llroundl(0.0l);
638579da 1901 #endif
dca89719 1902 log1p(0.0);
1903 log1pf(0.0f);
1904 log1pl(0.0l);
1905 log2(0.0);
1906 log2f(0.0f);
1907 log2l(0.0l);
1908 logb(0.0);
1909 logbf(0.0f);
1910 logbl(0.0l);
1911 lrint(0.0);
1912 lrintf(0.0f);
1913 lrintl(0.0l);
1914 lround(0.0);
1915 lroundf(0.0f);
1916 lroundl(0.0l);
1917 nan(0);
1918 nanf(0);
1919 nanl(0);
1920 nearbyint(0.0);
1921 nearbyintf(0.0f);
1922 nearbyintl(0.0l);
1923 nextafter(0.0, 0.0);
1924 nextafterf(0.0f, 0.0f);
1925 nextafterl(0.0l, 0.0l);
1926 nexttoward(0.0, 0.0);
1927 nexttowardf(0.0f, 0.0f);
1928 nexttowardl(0.0l, 0.0l);
1929 remainder(0.0, 0.0);
1930 remainderf(0.0f, 0.0f);
1931 remainderl(0.0l, 0.0l);
1932 remquo(0.0, 0.0, 0);
1933 remquof(0.0f, 0.0f, 0);
1934 remquol(0.0l, 0.0l, 0);
1935 rint(0.0);
1936 rintf(0.0f);
1937 rintl(0.0l);
1938 round(0.0);
1939 roundf(0.0f);
1940 roundl(0.0l);
1941 scalbln(0.0, 0l);
1942 scalblnf(0.0f, 0l);
1943 scalblnl(0.0l, 0l);
1944 scalbn(0.0, 0);
1945 scalbnf(0.0f, 0);
1946 scalbnl(0.0l, 0);
1947 tgamma(0.0);
1948 tgammaf(0.0f);
1949 tgammal(0.0l);
1950 trunc(0.0);
1951 truncf(0.0f);
1952 truncl(0.0l);
6992582a 1953 ],[glibcxx_cv_c99_math_tr1=yes], [glibcxx_cv_c99_math_tr1=no])
bc4c9cb8 1954 ])
6992582a 1955 AC_MSG_RESULT($glibcxx_cv_c99_math_tr1)
1956 if test x"$glibcxx_cv_c99_math_tr1" = x"yes"; then
bc4c9cb8 1957 AC_DEFINE(_GLIBCXX_USE_C99_MATH_TR1, 1,
dca89719 1958 [Define if C99 functions or macros in <math.h> should be imported
1959 in <tr1/cmath> in namespace std::tr1.])
638579da 1960
1961 case "${target_os}" in
1962 darwin*)
1963 AC_MSG_CHECKING([for ISO C99 rounding functions in <math.h>])
1964 AC_CACHE_VAL(glibcxx_cv_c99_math_llround, [
1965 AC_TRY_COMPILE([#include <math.h>],
1966 [llrint(0.0);
1967 llrintf(0.0f);
1968 llrintl(0.0l);
1969 llround(0.0);
1970 llroundf(0.0f);
1971 llroundl(0.0l);
1972 ],
1973 [glibcxx_cv_c99_math_llround=yes],
1974 [glibcxx_cv_c99_math_llround=no])
1975 ])
1976 AC_MSG_RESULT($glibcxx_cv_c99_math_llround)
1977 ;;
1978 esac
1979 if test x"$glibcxx_cv_c99_math_llround" = x"no"; then
1980 AC_DEFINE(_GLIBCXX_NO_C99_ROUNDING_FUNCS, 1,
1981 [Define if C99 llrint and llround functions are missing from <math.h>.])
1982 fi
bc4c9cb8 1983 fi
1984
ed9e4356 1985 # Check for the existence of <inttypes.h> functions (NB: doesn't make
c8fb4dda 1986 # sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
ed9e4356 1987 ac_c99_inttypes_tr1=no;
6992582a 1988 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
ed9e4356 1989 AC_MSG_CHECKING([for ISO C99 support to TR1 in <inttypes.h>])
1990 AC_TRY_COMPILE([#include <inttypes.h>],
dca89719 1991 [intmax_t i, numer, denom, base;
1992 const char* s;
1993 char** endptr;
1994 intmax_t ret = imaxabs(i);
1995 imaxdiv_t dret = imaxdiv(numer, denom);
1996 ret = strtoimax(s, endptr, base);
1997 uintmax_t uret = strtoumax(s, endptr, base);
1998 ],[ac_c99_inttypes_tr1=yes], [ac_c99_inttypes_tr1=no])
ed9e4356 1999 fi
cdd306be 2000 AC_MSG_RESULT($ac_c99_inttypes_tr1)
2001 if test x"$ac_c99_inttypes_tr1" = x"yes"; then
2002 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_TR1, 1,
dca89719 2003 [Define if C99 functions in <inttypes.h> should be imported in
2004 <tr1/cinttypes> in namespace std::tr1.])
cdd306be 2005 fi
2006
5c67f184 2007 # Check for the existence of wchar_t <inttypes.h> functions (NB: doesn't
c8fb4dda 2008 # make sense if the glibcxx_cv_c99_stdint_tr1 check fails, per C99, 7.8/1).
2009 ac_c99_inttypes_wchar_t_tr1=no;
2010 if test x"$glibcxx_cv_c99_stdint_tr1" = x"yes"; then
2011 AC_MSG_CHECKING([for wchar_t ISO C99 support to TR1 in <inttypes.h>])
2012 AC_TRY_COMPILE([#include <inttypes.h>],
dca89719 2013 [intmax_t base;
c8fb4dda 2014 const wchar_t* s;
dca89719 2015 wchar_t** endptr;
2016 intmax_t ret = wcstoimax(s, endptr, base);
2017 uintmax_t uret = wcstoumax(s, endptr, base);
2018 ],[ac_c99_inttypes_wchar_t_tr1=yes],
c8fb4dda 2019 [ac_c99_inttypes_wchar_t_tr1=no])
2020 fi
2021 AC_MSG_RESULT($ac_c99_inttypes_wchar_t_tr1)
2022 if test x"$ac_c99_inttypes_wchar_t_tr1" = x"yes"; then
2023 AC_DEFINE(_GLIBCXX_USE_C99_INTTYPES_WCHAR_T_TR1, 1,
dca89719 2024 [Define if wchar_t C99 functions in <inttypes.h> should be
c8fb4dda 2025 imported in <tr1/cinttypes> in namespace std::tr1.])
2026 fi
2027
dca89719 2028 # Check for the existence of the <stdbool.h> header.
5d89ab68 2029 AC_CHECK_HEADERS(stdbool.h)
2030
9efaf576 2031 # Check for the existence of the <stdalign.h> header.
2032 AC_CHECK_HEADERS(stdalign.h)
2033
91f76f05 2034 CXXFLAGS="$ac_save_CXXFLAGS"
d04e5f88 2035 AC_LANG_RESTORE
2036])
2037
f8c2da4b 2038dnl
2039dnl Check for uchar.h and usability.
2040dnl
2041AC_DEFUN([GLIBCXX_CHECK_UCHAR_H], [
2042
2043 # Test uchar.h.
2044 AC_CHECK_HEADERS(uchar.h, ac_has_uchar_h=yes, ac_has_uchar_h=no)
2045
2046 AC_LANG_SAVE
2047 AC_LANG_CPLUSPLUS
2048 ac_save_CXXFLAGS="$CXXFLAGS"
2049 CXXFLAGS="$CXXFLAGS -std=c++11"
2050
2051 if test x"$ac_has_uchar_h" = x"yes"; then
2052 AC_MSG_CHECKING([for ISO C11 support for <uchar.h>])
2053 AC_TRY_COMPILE([#include <uchar.h>
2054 #ifdef __STDC_UTF_16__
2055 long i = __STDC_UTF_16__;
2056 #endif
2057 #ifdef __STDC_UTF_32__
2058 long j = __STDC_UTF_32__;
2059 #endif
2060 namespace test
2061 {
2062 using ::c16rtomb;
2063 using ::c32rtomb;
2064 using ::mbrtoc16;
2065 using ::mbrtoc32;
2066 }
2067 ],
2068 [], [ac_c11_uchar_cxx11=yes], [ac_c11_uchar_cxx11=no])
2069 else
2070 ac_c11_uchar_cxx11=no
2071 fi
2072 AC_MSG_RESULT($ac_c11_uchar_cxx11)
2073 if test x"$ac_c11_uchar_cxx11" = x"yes"; then
2074 AC_DEFINE(_GLIBCXX_USE_C11_UCHAR_CXX11, 1,
2075 [Define if C11 functions in <uchar.h> should be imported into
2076 namespace std in <cuchar>.])
2077 fi
2078
2079 CXXFLAGS="$ac_save_CXXFLAGS"
2080 AC_LANG_RESTORE
2081])
2082
2083
61edee22 2084dnl
da44ccca 2085dnl Check whether "/dev/random" and "/dev/urandom" are available for
2086dnl class std::random_device from C++ 2011 [rand.device], and
61edee22 2087dnl random_device of "TR1" (Chapter 5.1, "Random number generation").
2088dnl
da44ccca 2089AC_DEFUN([GLIBCXX_CHECK_DEV_RANDOM], [
61edee22 2090
da44ccca 2091 AC_MSG_CHECKING([for "/dev/random" and "/dev/urandom" for std::random_device])
2092 AC_CACHE_VAL(glibcxx_cv_dev_random, [
6063a383 2093 if test -r /dev/random && test -r /dev/urandom; then
da44ccca 2094 ## For MSys environment the test above is detected as false-positive
2095 ## on mingw-targets. So disable it explicitly for them.
f161da2e 2096 case ${target_os} in
da44ccca 2097 *mingw*) glibcxx_cv_dev_random=no ;;
2098 *) glibcxx_cv_dev_random=yes ;;
f161da2e 2099 esac
6063a383 2100 else
da44ccca 2101 glibcxx_cv_dev_random=no;
6063a383 2102 fi
61edee22 2103 ])
da44ccca 2104 AC_MSG_RESULT($glibcxx_cv_dev_random)
6063a383 2105
da44ccca 2106 if test x"$glibcxx_cv_dev_random" = x"yes"; then
2107 AC_DEFINE(_GLIBCXX_USE_DEV_RANDOM, 1,
2108 [Define if /dev/random and /dev/urandom are available for
2109 std::random_device.])
61edee22 2110 AC_DEFINE(_GLIBCXX_USE_RANDOM_TR1, 1,
dca89719 2111 [Define if /dev/random and /dev/urandom are available for
61edee22 2112 the random_device of TR1 (Chapter 5.1).])
2113 fi
2114
2115])
d04e5f88 2116
f4a11b09 2117dnl
ab109df4 2118dnl Compute the EOF, SEEK_CUR, and SEEK_END integer constants.
2119dnl
2120AC_DEFUN([GLIBCXX_COMPUTE_STDIO_INTEGER_CONSTANTS], [
2121
6f892aab 2122 AC_CACHE_CHECK([for the value of EOF], glibcxx_cv_stdio_eof, [
ab109df4 2123 AC_COMPUTE_INT([glibcxx_cv_stdio_eof], [[EOF]],
dca89719 2124 [#include <stdio.h>],
2125 [AC_MSG_ERROR([computing EOF failed])])
ab109df4 2126 ])
ab109df4 2127 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_EOF, $glibcxx_cv_stdio_eof,
dca89719 2128 [Define to the value of the EOF integer constant.])
ab109df4 2129
6f892aab 2130 AC_CACHE_CHECK([for the value of SEEK_CUR], glibcxx_cv_stdio_seek_cur, [
ab109df4 2131 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_cur], [[SEEK_CUR]],
dca89719 2132 [#include <stdio.h>],
2133 [AC_MSG_ERROR([computing SEEK_CUR failed])])
ab109df4 2134 ])
ab109df4 2135 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_CUR, $glibcxx_cv_stdio_seek_cur,
dca89719 2136 [Define to the value of the SEEK_CUR integer constant.])
ab109df4 2137
6f892aab 2138 AC_CACHE_CHECK([for the value of SEEK_END], glibcxx_cv_stdio_seek_end, [
ab109df4 2139 AC_COMPUTE_INT([glibcxx_cv_stdio_seek_end], [[SEEK_END]],
dca89719 2140 [#include <stdio.h>],
2141 [AC_MSG_ERROR([computing SEEK_END failed])])
ab109df4 2142 ])
ab109df4 2143 AC_DEFINE_UNQUOTED(_GLIBCXX_STDIO_SEEK_END, $glibcxx_cv_stdio_seek_end,
dca89719 2144 [Define to the value of the SEEK_END integer constant.])
f4a11b09 2145])
2146
b4eb4a64 2147dnl
2148dnl Check whether required C++ overloads are present in <stdio.h>.
2149dnl
2150AC_DEFUN([GLIBCXX_CHECK_STDIO_PROTO], [
2151
2152 AC_LANG_SAVE
2153 AC_LANG_CPLUSPLUS
5bb875df 2154 # Use C++11 because a conforming <stdio.h> won't define gets for C++14,
2155 # and we don't need a declaration for C++14 anyway.
2156 ac_save_CXXFLAGS="$CXXFLAGS"
2157 CXXFLAGS="$CXXFLAGS -std=gnu++11"
b4eb4a64 2158
2159 AC_MSG_CHECKING([for gets declaration])
2160 AC_CACHE_VAL(glibcxx_cv_gets, [
2161 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2162 [#include <stdio.h>
2163 namespace test
2164 {
2165 using ::gets;
2166 }
2167 ])],
2168 [glibcxx_cv_gets=yes],
2169 [glibcxx_cv_gets=no]
2170 )])
2171
2172 if test $glibcxx_cv_gets = yes; then
5bb875df 2173 AC_DEFINE(HAVE_GETS, 1, [Define if gets is available in <stdio.h> before C++14.])
b4eb4a64 2174 fi
2175 AC_MSG_RESULT($glibcxx_cv_gets)
2176
5bb875df 2177 CXXFLAGS="$ac_save_CXXFLAGS"
b4eb4a64 2178 AC_LANG_RESTORE
2179])
2180
f8b67ee9 2181dnl
13d9a983 2182dnl Check whether required C++11 overloads for floating point and integral
2183dnl types are present in <math.h>.
f8b67ee9 2184dnl
2185AC_DEFUN([GLIBCXX_CHECK_MATH11_PROTO], [
2186
2187 AC_LANG_SAVE
2188 AC_LANG_CPLUSPLUS
2189 ac_save_CXXFLAGS="$CXXFLAGS"
2190 CXXFLAGS="$CXXFLAGS -std=c++11"
2191
2192 case "$host" in
2193 *-*-solaris2.*)
13d9a983 2194 # Solaris 12 Build 86, Solaris 11.3 SRU 3.6, and Solaris 10 Patch
2195 # 11996[67]-02 introduced the C++11 <math.h> floating point overloads.
2196 AC_MSG_CHECKING([for C++11 <math.h> floating point overloads])
2197 AC_CACHE_VAL(glibcxx_cv_math11_fp_overload, [
f8b67ee9 2198 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2199 [#include <math.h>
2200 #undef isfinite
2201 namespace std {
2202 inline bool isfinite(float __x)
2203 { return __builtin_isfinite(__x); }
2204 }
2205 ])],
13d9a983 2206 [glibcxx_cv_math11_fp_overload=no],
2207 [glibcxx_cv_math11_fp_overload=yes]
f8b67ee9 2208 )])
2209
2210 # autoheader cannot handle indented templates.
13d9a983 2211 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_FP],
2212 [/* Define if all C++11 floating point overloads are available in <math.h>. */
f8b67ee9 2213#if __cplusplus >= 201103L
13d9a983 2214#undef __CORRECT_ISO_CPP11_MATH_H_PROTO_FP
f8b67ee9 2215#endif])
2216
13d9a983 2217 if test $glibcxx_cv_math11_fp_overload = yes; then
2218 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_FP)
f8b67ee9 2219 fi
13d9a983 2220 AC_MSG_RESULT([$glibcxx_cv_math11_fp_overload])
2221
2222 # Solaris 12 Build 90, Solaris 11.3 SRU 5.6, and Solaris 10 Patch
2223 # 11996[67]-02 introduced the C++11 <math.h> integral type overloads.
2224 AC_MSG_CHECKING([for C++11 <math.h> integral type overloads])
2225 AC_CACHE_VAL(glibcxx_cv_math11_int_overload, [
2226 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
2227 [#include <math.h>
2228 namespace std {
2229 template<typename _Tp>
2230 struct __is_integer;
2231 template<>
2232 struct __is_integer<int>
2233 {
2234 enum { __value = 1 };
2235 };
2236 }
2237 namespace __gnu_cxx {
2238 template<bool, typename>
2239 struct __enable_if;
2240 template<typename _Tp>
2241 struct __enable_if<true, _Tp>
2242 { typedef _Tp __type; };
2243 }
2244 namespace std {
2245 template<typename _Tp>
2246 constexpr typename __gnu_cxx::__enable_if
2247 <__is_integer<_Tp>::__value, double>::__type
2248 log2(_Tp __x)
2249 { return __builtin_log2(__x); }
2250 }
2251 int
2252 main (void)
2253 {
2254 int i = 1000;
2255 return std::log2(i);
2256 }
2257 ])],
2258 [glibcxx_cv_math11_int_overload=no],
2259 [glibcxx_cv_math11_int_overload=yes]
2260 )])
2261
2262 # autoheader cannot handle indented templates.
2263 AH_VERBATIM([__CORRECT_ISO_CPP11_MATH_H_PROTO_INT],
2264 [/* Define if all C++11 integral type overloads are available in <math.h>. */
2265#if __cplusplus >= 201103L
2266#undef __CORRECT_ISO_CPP11_MATH_H_PROTO_INT
2267#endif])
2268
2269 if test $glibcxx_cv_math11_int_overload = yes; then
2270 AC_DEFINE(__CORRECT_ISO_CPP11_MATH_H_PROTO_INT)
2271 fi
2272 AC_MSG_RESULT([$glibcxx_cv_math11_int_overload])
f8b67ee9 2273 ;;
b0a73992 2274 *)
b23837e0 2275 # If <math.h> defines the obsolete isinf(double) and isnan(double)
2276 # functions (instead of or as well as the C99 generic macros) then we
2277 # can't define std::isinf(double) and std::isnan(double) in <cmath>
2278 # and must use the ones from <math.h> instead.
9b2c24cd 2279 AC_MSG_CHECKING([for obsolete isinf function in <math.h>])
2280 AC_CACHE_VAL(glibcxx_cv_obsolete_isinf, [
b23837e0 2281 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
b0a73992 2282 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2283 #include <math.h>
b23837e0 2284 #undef isinf
b23837e0 2285 namespace std {
2286 using ::isinf;
6c1b4080 2287 bool isinf(float);
2288 bool isinf(long double);
9b2c24cd 2289 }
2290 using std::isinf;
2291 bool b = isinf(0.0);
2292 ])],
2293 [glibcxx_cv_obsolete_isinf=yes],
2294 [glibcxx_cv_obsolete_isinf=no]
2295 )])
2296 AC_MSG_RESULT([$glibcxx_cv_obsolete_isinf])
2297 if test $glibcxx_cv_obsolete_isinf = yes; then
2298 AC_DEFINE(HAVE_OBSOLETE_ISINF, 1,
2299 [Define if <math.h> defines obsolete isinf function.])
2300 fi
2301
2302 AC_MSG_CHECKING([for obsolete isnan function in <math.h>])
2303 AC_CACHE_VAL(glibcxx_cv_obsolete_isnan, [
2304 AC_COMPILE_IFELSE([AC_LANG_SOURCE(
41c5ff99 2305 [#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
2306 #include <math.h>
9b2c24cd 2307 #undef isnan
2308 namespace std {
b23837e0 2309 using ::isnan;
2310 bool isnan(float);
2311 bool isnan(long double);
2312 }
b23837e0 2313 using std::isnan;
9b2c24cd 2314 bool b = isnan(0.0);
b23837e0 2315 ])],
9b2c24cd 2316 [glibcxx_cv_obsolete_isnan=yes],
2317 [glibcxx_cv_obsolete_isnan=no]
b23837e0 2318 )])
9b2c24cd 2319 AC_MSG_RESULT([$glibcxx_cv_obsolete_isnan])
2320 if test $glibcxx_cv_obsolete_isnan = yes; then
2321 AC_DEFINE(HAVE_OBSOLETE_ISNAN, 1,
2322 [Define if <math.h> defines obsolete isnan function.])
b23837e0 2323 fi
b23837e0 2324 ;;
f8b67ee9 2325 esac
2326
2327 CXXFLAGS="$ac_save_CXXFLAGS"
2328 AC_LANG_RESTORE
2329])
2330
d0ff4e64 2331dnl
2332dnl Check whether macros, etc are present for <system_error>
2333dnl
2334AC_DEFUN([GLIBCXX_CHECK_SYSTEM_ERROR], [
2335
6992582a 2336m4_pushdef([n_syserr], [1])dnl
2337m4_foreach([syserr], [EOWNERDEAD, ENOTRECOVERABLE, ENOLINK, EPROTO, ENODATA,
9539daa0 2338 ENOSR, ENOSTR, ETIME, EBADMSG, ECANCELED,
db27024b 2339 EOVERFLOW, ENOTSUP, EIDRM, ETXTBSY,
2340 ECHILD, ENOSPC, EPERM,
2341 ETIMEDOUT, EWOULDBLOCK],
6992582a 2342[m4_pushdef([SYSERR], m4_toupper(syserr))dnl
2343AC_MSG_CHECKING([for syserr])
2344AC_CACHE_VAL([glibcxx_cv_system_error[]n_syserr], [
2345AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]],
2346 [int i = syserr;])],
2347 [glibcxx_cv_system_error[]n_syserr=yes],
2348 [glibcxx_cv_system_error[]n_syserr=no])
2349])
2350AC_MSG_RESULT([$glibcxx_cv_system_error[]n_syserr])
2351if test x"$glibcxx_cv_system_error[]n_syserr" = x"yes"; then
2352 AC_DEFINE([HAVE_]SYSERR, 1, [Define if ]syserr[ exists.])
2353fi
2354m4_define([n_syserr], m4_incr(n_syserr))dnl
2355m4_popdef([SYSERR])dnl
2356])
2357m4_popdef([n_syserr])dnl
d0ff4e64 2358])
2359
20752884 2360dnl
68224f8d 2361dnl Check for what type of C headers to use.
2362dnl
2363dnl --enable-cheaders= [does stuff].
2364dnl --disable-cheaders [does not do anything, really].
2365dnl + Usage: GLIBCXX_ENABLE_CHEADERS[(DEFAULT)]
bec9a462 2366dnl Where DEFAULT is either 'c' or 'c_std' or 'c_global'.
68224f8d 2367dnl
2ad02b6c 2368AC_DEFUN([GLIBCXX_ENABLE_CHEADERS], [
dae1a11c 2369 GLIBCXX_ENABLE(cheaders,$1,[[[=KIND]]],
bec9a462 2370 [construct "C" headers for g++], [permit c|c_std|c_global])
68224f8d 2371 AC_MSG_NOTICE("C" header strategy set to $enable_cheaders)
2372
2373 C_INCLUDE_DIR='${glibcxx_srcdir}/include/'$enable_cheaders
2374
bec9a462 2375 # Allow overrides to configure.host here.
2376 if test $enable_cheaders = c_global; then
2377 c_compatibility=yes
2378 fi
2379
68224f8d 2380 AC_SUBST(C_INCLUDE_DIR)
11764568 2381 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C, test $enable_cheaders = c)
2382 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_STD, test $enable_cheaders = c_std)
bec9a462 2383 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_C_GLOBAL, test $enable_cheaders = c_global)
11764568 2384 GLIBCXX_CONDITIONAL(GLIBCXX_C_HEADERS_COMPATIBILITY, test $c_compatibility = yes)
68224f8d 2385])
2386
2387
20752884 2388dnl
68224f8d 2389dnl Check for which locale library to use. The choice is mapped to
2390dnl a subdirectory of config/locale.
77cbec55 2391dnl
68224f8d 2392dnl Default is generic.
20752884 2393dnl
2ad02b6c 2394AC_DEFUN([GLIBCXX_ENABLE_CLOCALE], [
dae1a11c 2395 GLIBCXX_ENABLE(clocale,auto,[[[=MODEL]]],
68224f8d 2396 [use MODEL for target locale package],
77cefa59 2397 [permit generic|gnu|ieee_1003.1-2001|newlib|yes|no|auto])
4a17ac7b 2398
2399 # Deal with gettext issues. Default to not using it (=no) until we detect
2400 # support for it later. Let the user turn it off via --e/d, but let that
2401 # default to on for easier handling.
2402 USE_NLS=no
2403 AC_ARG_ENABLE(nls,
2404 AC_HELP_STRING([--enable-nls],[use Native Language Support (default)]),
2405 [],
2406 [enable_nls=yes])
dca89719 2407
77cefa59 2408 # Either a known package, or "auto"
68224f8d 2409 if test $enable_clocale = no || test $enable_clocale = yes; then
2410 enable_clocale=auto
2411 fi
20752884 2412 enable_clocale_flag=$enable_clocale
2413
4a17ac7b 2414 # Probe for locale model to use if none specified.
68224f8d 2415 # Default to "generic".
2416 if test $enable_clocale_flag = auto; then
1abe8d9c 2417 case ${target_os} in
2418 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
dca89719 2419 enable_clocale_flag=gnu
2420 ;;
7b9f7d16 2421 darwin*)
dca89719 2422 enable_clocale_flag=darwin
9132fd65 2423 ;;
7b9f7d16 2424 dragonfly* | freebsd*)
463553db 2425 enable_clocale_flag=dragonfly
2426 ;;
ce1a5edb 2427 openbsd*)
2428 enable_clocale_flag=newlib
2429 ;;
01702872 2430 *)
77cefa59 2431 if test x"$with_newlib" = x"yes"; then
2432 enable_clocale_flag=newlib
2433 else
2434 enable_clocale_flag=generic
2435 fi
dca89719 2436 ;;
01702872 2437 esac
2438 fi
2439
4a17ac7b 2440 # Sanity check model, and test for special functionality.
2441 if test $enable_clocale_flag = gnu; then
2442 AC_EGREP_CPP([_GLIBCXX_ok], [
2443 #include <features.h>
9aa6a0dd 2444 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(__UCLIBC__)
4a17ac7b 2445 _GLIBCXX_ok
2446 #endif
2447 ], enable_clocale_flag=gnu, enable_clocale_flag=generic)
2448
4a17ac7b 2449 # Set it to scream when it hurts.
dca89719 2450 ac_save_CFLAGS="$CFLAGS"
4a17ac7b 2451 CFLAGS="-Wimplicit-function-declaration -Werror"
2452
2453 # Use strxfrm_l if available.
2454 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2455 #include <string.h>
2456 #include <locale.h>],
dca89719 2457 [char s[128]; __locale_t loc; strxfrm_l(s, "C", 5, loc);],
2458 AC_DEFINE(HAVE_STRXFRM_L, 1,
2459 [Define if strxfrm_l is available in <string.h>.]),)
2460
4a17ac7b 2461 # Use strerror_l if available.
2462 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2463 #include <string.h>
2464 #include <locale.h>],
dca89719 2465 [__locale_t loc; strerror_l(5, loc);],
2466 AC_DEFINE(HAVE_STRERROR_L, 1,
2467 [Define if strerror_l is available in <string.h>.]),)
4a17ac7b 2468
2469 CFLAGS="$ac_save_CFLAGS"
2470 fi
2471
2472 # Perhaps use strerror_r if available, and strerror_l isn't.
dca89719 2473 ac_save_CFLAGS="$CFLAGS"
4a17ac7b 2474 CFLAGS="-Wimplicit-function-declaration -Werror"
2475 AC_TRY_COMPILE([#define _GNU_SOURCE 1
2476 #include <string.h>
2477 #include <locale.h>],
dca89719 2478 [char s[128]; strerror_r(5, s, 128);],
2479 AC_DEFINE(HAVE_STRERROR_R, 1,
2480 [Define if strerror_r is available in <string.h>.]),)
4a17ac7b 2481 CFLAGS="$ac_save_CFLAGS"
a1555270 2482
68224f8d 2483 # Set configure bits for specified locale package
4a17ac7b 2484 AC_MSG_CHECKING([for C locale to use])
68224f8d 2485 case ${enable_clocale_flag} in
2486 generic)
c099f5df 2487 AC_MSG_RESULT(generic)
2488
cd534976 2489 CLOCALE_H=config/locale/generic/c_locale.h
2490 CLOCALE_CC=config/locale/generic/c_locale.cc
a314f26a 2491 CCODECVT_CC=config/locale/generic/codecvt_members.cc
cd534976 2492 CCOLLATE_CC=config/locale/generic/collate_members.cc
2493 CCTYPE_CC=config/locale/generic/ctype_members.cc
2494 CMESSAGES_H=config/locale/generic/messages_members.h
2495 CMESSAGES_CC=config/locale/generic/messages_members.cc
2496 CMONEY_CC=config/locale/generic/monetary_members.cc
2497 CNUMERIC_CC=config/locale/generic/numeric_members.cc
5cd3cc5f 2498 CTIME_H=config/locale/generic/time_members.h
cd534976 2499 CTIME_CC=config/locale/generic/time_members.cc
8404b390 2500 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
c099f5df 2501 ;;
9132fd65 2502 darwin)
7b9f7d16 2503 AC_MSG_RESULT(darwin)
9132fd65 2504
2505 CLOCALE_H=config/locale/generic/c_locale.h
2506 CLOCALE_CC=config/locale/generic/c_locale.cc
9132fd65 2507 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2508 CCOLLATE_CC=config/locale/generic/collate_members.cc
2509 CCTYPE_CC=config/locale/darwin/ctype_members.cc
2510 CMESSAGES_H=config/locale/generic/messages_members.h
2511 CMESSAGES_CC=config/locale/generic/messages_members.cc
2512 CMONEY_CC=config/locale/generic/monetary_members.cc
2513 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2514 CTIME_H=config/locale/generic/time_members.h
2515 CTIME_CC=config/locale/generic/time_members.cc
2516 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2517 ;;
dca89719 2518
463553db 2519 dragonfly)
7b9f7d16 2520 AC_MSG_RESULT(dragonfly or freebsd)
463553db 2521
418255b1 2522 CLOCALE_H=config/locale/dragonfly/c_locale.h
463553db 2523 CLOCALE_CC=config/locale/dragonfly/c_locale.cc
418255b1 2524 CCODECVT_CC=config/locale/dragonfly/codecvt_members.cc
2525 CCOLLATE_CC=config/locale/dragonfly/collate_members.cc
463553db 2526 CCTYPE_CC=config/locale/dragonfly/ctype_members.cc
2527 CMESSAGES_H=config/locale/generic/messages_members.h
2528 CMESSAGES_CC=config/locale/generic/messages_members.cc
418255b1 2529 CMONEY_CC=config/locale/dragonfly/monetary_members.cc
2530 CNUMERIC_CC=config/locale/dragonfly/numeric_members.cc
2531 CTIME_H=config/locale/dragonfly/time_members.h
2532 CTIME_CC=config/locale/dragonfly/time_members.cc
463553db 2533 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2534 ;;
2535
68224f8d 2536 gnu)
20752884 2537 AC_MSG_RESULT(gnu)
c099f5df 2538
2539 # Declare intention to use gettext, and add support for specific
2540 # languages.
237ebf59 2541 # For some reason, ALL_LINGUAS has to be before AM-GNU-GETTEXT
c099f5df 2542 ALL_LINGUAS="de fr"
a1555270 2543
237ebf59 2544 # Don't call AM-GNU-GETTEXT here. Instead, assume glibc.
a1555270 2545 AC_CHECK_PROG(check_msgfmt, msgfmt, yes, no)
2546 if test x"$check_msgfmt" = x"yes" && test x"$enable_nls" = x"yes"; then
dca89719 2547 USE_NLS=yes
a1555270 2548 fi
c099f5df 2549 # Export the build objects.
2550 for ling in $ALL_LINGUAS; do \
dca89719 2551 glibcxx_MOFILES="$glibcxx_MOFILES $ling.mo"; \
2552 glibcxx_POFILES="$glibcxx_POFILES $ling.po"; \
c099f5df 2553 done
5a64d8cf 2554 AC_SUBST(glibcxx_MOFILES)
2555 AC_SUBST(glibcxx_POFILES)
c099f5df 2556
cd534976 2557 CLOCALE_H=config/locale/gnu/c_locale.h
2558 CLOCALE_CC=config/locale/gnu/c_locale.cc
a314f26a 2559 CCODECVT_CC=config/locale/gnu/codecvt_members.cc
cd534976 2560 CCOLLATE_CC=config/locale/gnu/collate_members.cc
2561 CCTYPE_CC=config/locale/gnu/ctype_members.cc
2562 CMESSAGES_H=config/locale/gnu/messages_members.h
2563 CMESSAGES_CC=config/locale/gnu/messages_members.cc
2564 CMONEY_CC=config/locale/gnu/monetary_members.cc
2565 CNUMERIC_CC=config/locale/gnu/numeric_members.cc
5cd3cc5f 2566 CTIME_H=config/locale/gnu/time_members.h
cd534976 2567 CTIME_CC=config/locale/gnu/time_members.cc
8404b390 2568 CLOCALE_INTERNAL_H=config/locale/gnu/c++locale_internal.h
20752884 2569 ;;
68224f8d 2570 ieee_1003.1-2001)
265ccc33 2571 AC_MSG_RESULT(IEEE 1003.1)
c099f5df 2572
cd534976 2573 CLOCALE_H=config/locale/ieee_1003.1-2001/c_locale.h
2574 CLOCALE_CC=config/locale/ieee_1003.1-2001/c_locale.cc
a314f26a 2575 CCODECVT_CC=config/locale/generic/codecvt_members.cc
cd534976 2576 CCOLLATE_CC=config/locale/generic/collate_members.cc
2577 CCTYPE_CC=config/locale/generic/ctype_members.cc
2578 CMESSAGES_H=config/locale/ieee_1003.1-2001/messages_members.h
2579 CMESSAGES_CC=config/locale/ieee_1003.1-2001/messages_members.cc
2580 CMONEY_CC=config/locale/generic/monetary_members.cc
2581 CNUMERIC_CC=config/locale/generic/numeric_members.cc
5cd3cc5f 2582 CTIME_H=config/locale/generic/time_members.h
cd534976 2583 CTIME_CC=config/locale/generic/time_members.cc
8404b390 2584 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
20752884 2585 ;;
77cefa59 2586 newlib)
2587 AC_MSG_RESULT(newlib)
2588
2589 CLOCALE_H=config/locale/generic/c_locale.h
2590 CLOCALE_CC=config/locale/generic/c_locale.cc
2591 CCODECVT_CC=config/locale/generic/codecvt_members.cc
2592 CCOLLATE_CC=config/locale/generic/collate_members.cc
2593 CCTYPE_CC=config/locale/newlib/ctype_members.cc
2594 CMESSAGES_H=config/locale/generic/messages_members.h
2595 CMESSAGES_CC=config/locale/generic/messages_members.cc
2596 CMONEY_CC=config/locale/generic/monetary_members.cc
2597 CNUMERIC_CC=config/locale/generic/numeric_members.cc
2598 CTIME_H=config/locale/generic/time_members.h
2599 CTIME_CC=config/locale/generic/time_members.cc
2600 CLOCALE_INTERNAL_H=config/locale/generic/c++locale_internal.h
2601 ;;
20752884 2602 esac
2603
c099f5df 2604 # This is where the testsuite looks for locale catalogs, using the
2605 # -DLOCALEDIR define during testsuite compilation.
5a64d8cf 2606 glibcxx_localedir=${glibcxx_builddir}/po/share/locale
2607 AC_SUBST(glibcxx_localedir)
c099f5df 2608
265ccc33 2609 # A standalone libintl (e.g., GNU libintl) may be in use.
2610 if test $USE_NLS = yes; then
307f7a6d 2611 AC_CHECK_HEADERS([libintl.h], [], USE_NLS=no)
2612 AC_SEARCH_LIBS(gettext, intl, [], USE_NLS=no)
2613 fi
2614 if test $USE_NLS = yes; then
dca89719 2615 AC_DEFINE(_GLIBCXX_USE_NLS, 1,
2616 [Define if NLS translations are to be used.])
265ccc33 2617 fi
2618
241a90f2 2619 AC_SUBST(USE_NLS)
db42028b 2620 AC_SUBST(CLOCALE_H)
c099f5df 2621 AC_SUBST(CMESSAGES_H)
7f713ccf 2622 AC_SUBST(CCODECVT_CC)
2623 AC_SUBST(CCOLLATE_CC)
2624 AC_SUBST(CCTYPE_CC)
2625 AC_SUBST(CMESSAGES_CC)
2626 AC_SUBST(CMONEY_CC)
2627 AC_SUBST(CNUMERIC_CC)
5cd3cc5f 2628 AC_SUBST(CTIME_H)
7f713ccf 2629 AC_SUBST(CTIME_CC)
2630 AC_SUBST(CLOCALE_CC)
2631 AC_SUBST(CLOCALE_INTERNAL_H)
20752884 2632])
2633
2634
0b0e5029 2635dnl
2636dnl Check for which std::allocator base class to use. The choice is
2637dnl mapped from a subdirectory of include/ext.
2638dnl
2639dnl Default is new.
2640dnl
2641AC_DEFUN([GLIBCXX_ENABLE_ALLOCATOR], [
c586733c 2642 AC_MSG_CHECKING([for std::allocator base class])
dae1a11c 2643 GLIBCXX_ENABLE(libstdcxx-allocator,auto,[[[=KIND]]],
0b0e5029 2644 [use KIND for target std::allocator base],
3f601d11 2645 [permit new|malloc|mt|bitmap|pool|yes|no|auto])
1abe8d9c 2646
0b0e5029 2647 # If they didn't use this option switch, or if they specified --enable
2648 # with no specific model, we'll have to look for one. If they
2649 # specified --disable (???), do likewise.
1abe8d9c 2650 if test $enable_libstdcxx_allocator = no ||
2651 test $enable_libstdcxx_allocator = yes;
2652 then
0b0e5029 2653 enable_libstdcxx_allocator=auto
2654 fi
2655
292718d4 2656 # Either a known package, or "auto". Auto implies the default choice
2657 # for a particular platform.
0b0e5029 2658 enable_libstdcxx_allocator_flag=$enable_libstdcxx_allocator
2659
2660 # Probe for host-specific support if no specific model is specified.
2661 # Default to "new".
2662 if test $enable_libstdcxx_allocator_flag = auto; then
2663 case ${target_os} in
292718d4 2664 linux* | gnu* | kfreebsd*-gnu | knetbsd*-gnu)
dca89719 2665 enable_libstdcxx_allocator_flag=new
2666 ;;
0b0e5029 2667 *)
dca89719 2668 enable_libstdcxx_allocator_flag=new
2669 ;;
0b0e5029 2670 esac
2671 fi
2672 AC_MSG_RESULT($enable_libstdcxx_allocator_flag)
dca89719 2673
0b0e5029 2674
2675 # Set configure bits for specified locale package
2676 case ${enable_libstdcxx_allocator_flag} in
2677 bitmap)
2678 ALLOCATOR_H=config/allocator/bitmap_allocator_base.h
2679 ALLOCATOR_NAME=__gnu_cxx::bitmap_allocator
2680 ;;
2681 malloc)
2682 ALLOCATOR_H=config/allocator/malloc_allocator_base.h
2683 ALLOCATOR_NAME=__gnu_cxx::malloc_allocator
2684 ;;
2685 mt)
2686 ALLOCATOR_H=config/allocator/mt_allocator_base.h
2687 ALLOCATOR_NAME=__gnu_cxx::__mt_alloc
2688 ;;
2689 new)
2690 ALLOCATOR_H=config/allocator/new_allocator_base.h
2691 ALLOCATOR_NAME=__gnu_cxx::new_allocator
2692 ;;
3f601d11 2693 pool)
2694 ALLOCATOR_H=config/allocator/pool_allocator_base.h
2695 ALLOCATOR_NAME=__gnu_cxx::__pool_alloc
dca89719 2696 ;;
0b0e5029 2697 esac
2698
13143e13 2699 GLIBCXX_CONDITIONAL(ENABLE_ALLOCATOR_NEW,
2700 test $enable_libstdcxx_allocator_flag = new)
0b0e5029 2701 AC_SUBST(ALLOCATOR_H)
2702 AC_SUBST(ALLOCATOR_NAME)
2703])
2704
2705
b9e8095b 2706dnl
68224f8d 2707dnl Check for whether the Boost-derived checks should be turned on.
2708dnl
2709dnl --enable-concept-checks turns them on.
2710dnl --disable-concept-checks leaves them off.
2711dnl + Usage: GLIBCXX_ENABLE_CONCEPT_CHECKS[(DEFAULT)]
2712dnl Where DEFAULT is either `yes' or `no'.
2713dnl
2ad02b6c 2714AC_DEFUN([GLIBCXX_ENABLE_CONCEPT_CHECKS], [
68224f8d 2715 GLIBCXX_ENABLE(concept-checks,$1,,[use Boost-derived template checks])
2716 if test $enable_concept_checks = yes; then
d64903a9 2717 AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1,
dca89719 2718 [Define to use concept checking code from the boost libraries.])
68224f8d 2719 fi
2720])
2721
cb38c7e0 2722dnl
2723dnl Use extern templates.
2724dnl
2725dnl --enable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 1
2726dnl --disable-extern-template defines _GLIBCXX_EXTERN_TEMPLATE to 0
2727
2728dnl + Usage: GLIBCXX_ENABLE_TEMPLATE[(DEFAULT)]
2729dnl Where DEFAULT is `yes' or `no'.
2730dnl
2731AC_DEFUN([GLIBCXX_ENABLE_EXTERN_TEMPLATE], [
2732
2733 GLIBCXX_ENABLE(extern-template,$1,,[enable extern template])
2734
2735 AC_MSG_CHECKING([for extern template support])
2736 AC_MSG_RESULT([$enable_extern_template])
2737
2738 GLIBCXX_CONDITIONAL(ENABLE_EXTERN_TEMPLATE, test $enable_extern_template = yes)
2739])
2740
b710ec85 2741dnl
2742dnl Use vtable verification.
2743dnl
2744dnl --enable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 1
2745dnl --disable-vtable-verify defines _GLIBCXX_VTABLE_VERIFY to 0
2746
2747dnl + Usage: GLIBCXX_ENABLE_VTABLE_VERIFY[(DEFAULT)]
2748dnl Where DEFAULT is `yes' or `no'.
2749dnl
2750AC_DEFUN([GLIBCXX_ENABLE_VTABLE_VERIFY], [
2751
2752 GLIBCXX_ENABLE(vtable-verify,$1,,[enable vtable verify])
2753
2754 AC_MSG_CHECKING([for vtable verify support])
2755 AC_MSG_RESULT([$enable_vtable_verify])
2756
5bb1df18 2757 vtv_cygmin=no
b710ec85 2758 if test $enable_vtable_verify = yes; then
5be42fa9 2759 case ${target_os} in
2760 cygwin*|mingw32*)
2761 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-lvtv,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
a95f42c2 2762 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
5bb1df18 2763 vtv_cygmin=yes
5be42fa9 2764 ;;
a95f42c2 2765 darwin*)
2766 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u,_vtable_map_vars_start -Wl,-u,_vtable_map_vars_end"
2767 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-rpath,${toplevel_builddir}/libvtv/.libs"
2768 ;;
08de21a4 2769 solaris2*)
2770 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
2771 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,-R -Wl,${toplevel_builddir}/libvtv/.libs"
2772 ;;
5be42fa9 2773 *)
2774 VTV_CXXFLAGS="-fvtable-verify=std -Wl,-u_vtable_map_vars_start,-u_vtable_map_vars_end"
a95f42c2 2775 VTV_CXXLINKFLAGS="-L${toplevel_builddir}/libvtv/.libs -Wl,--rpath -Wl,${toplevel_builddir}/libvtv/.libs"
5be42fa9 2776 ;;
2777 esac
b710ec85 2778 VTV_PCH_CXXFLAGS="-fvtable-verify=std"
b710ec85 2779 else
2780 VTV_CXXFLAGS=
2781 VTV_PCH_CXXFLAGS=
2782 VTV_CXXLINKFLAGS=
2783 fi
2784
2785 AC_SUBST(VTV_CXXFLAGS)
2786 AC_SUBST(VTV_PCH_CXXFLAGS)
2787 AC_SUBST(VTV_CXXLINKFLAGS)
5bb1df18 2788 AM_CONDITIONAL(VTV_CYGMIN, test x$vtv_cygmin = xyes)
b710ec85 2789 GLIBCXX_CONDITIONAL(ENABLE_VTABLE_VERIFY, test $enable_vtable_verify = yes)
2790])
2791
6482a45c 2792dnl
2793dnl Check for parallel mode pre-requisites, including OpenMP support.
2794dnl
2795dnl + Usage: GLIBCXX_ENABLE_PARALLEL
2796dnl
2797AC_DEFUN([GLIBCXX_ENABLE_PARALLEL], [
2798
2799 enable_parallel=no;
6bb3458a 2800
e2db2723 2801 # See if configured libgomp/omp.h exists. (libgomp may be in
2802 # noconfigdirs but not explicitly disabled.)
1fda3360 2803 if echo " ${TARGET_CONFIGDIRS} " | grep " libgomp " > /dev/null 2>&1 ; then
e2db2723 2804 enable_parallel=yes;
2805 else
1fda3360 2806 AC_MSG_NOTICE([target-libgomp not built])
6482a45c 2807 fi
2808
2809 AC_MSG_CHECKING([for parallel mode support])
2810 AC_MSG_RESULT([$enable_parallel])
6482a45c 2811])
2812
68224f8d 2813
b9e8095b 2814dnl
68224f8d 2815dnl Check for which I/O library to use: stdio, or something specific.
77cbec55 2816dnl
68224f8d 2817dnl Default is stdio.
b9e8095b 2818dnl
2ad02b6c 2819AC_DEFUN([GLIBCXX_ENABLE_CSTDIO], [
68224f8d 2820 AC_MSG_CHECKING([for underlying I/O to use])
dae1a11c 2821 GLIBCXX_ENABLE(cstdio,stdio,[[[=PACKAGE]]],
68224f8d 2822 [use target-specific I/O package], [permit stdio])
2823
2824 # Now that libio has been removed, you can have any color you want as long
2825 # as it's black. This is one big no-op until other packages are added, but
2826 # showing the framework never hurts.
2827 case ${enable_cstdio} in
2828 stdio)
c099f5df 2829 CSTDIO_H=config/io/c_io_stdio.h
2830 BASIC_FILE_H=config/io/basic_file_stdio.h
2831 BASIC_FILE_CC=config/io/basic_file_stdio.cc
e7ccf4bf 2832 AC_MSG_RESULT(stdio)
27f70a82 2833 ;;
b9e8095b 2834 esac
0d554d4f 2835
db42028b 2836 AC_SUBST(CSTDIO_H)
2837 AC_SUBST(BASIC_FILE_H)
7f713ccf 2838 AC_SUBST(BASIC_FILE_CC)
b9e8095b 2839])
2840
2841
3d8dde60 2842dnl
68224f8d 2843dnl Check for "unusual" flags to pass to the compiler while building.
3d8dde60 2844dnl
68224f8d 2845dnl --enable-cxx-flags='-foo -bar -baz' is a general method for passing
2846dnl experimental flags such as -fpch, -fIMI, -Dfloat=char, etc.
2847dnl --disable-cxx-flags passes nothing.
2848dnl + See http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00131.html
2849dnl http://gcc.gnu.org/ml/libstdc++/2000-q2/msg00284.html
2850dnl http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00035.html
2851dnl + Usage: GLIBCXX_ENABLE_CXX_FLAGS(default flags)
2852dnl If "default flags" is an empty string, the effect is the same
2853dnl as --disable or --enable=no.
75f8cc74 2854dnl
2ad02b6c 2855AC_DEFUN([GLIBCXX_ENABLE_CXX_FLAGS], [dnl
68224f8d 2856 AC_MSG_CHECKING([for extra compiler flags for building])
2857 GLIBCXX_ENABLE(cxx-flags,$1,[=FLAGS],
2858 [pass compiler FLAGS when building library],
2859 [case "x$enable_cxx_flags" in
2860 xno | x) enable_cxx_flags= ;;
2861 x-*) ;;
2862 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2863 esac])
2864
2865 # Run through flags (either default or command-line) and set anything
2866 # extra (e.g., #defines) that must accompany particular g++ options.
2867 if test -n "$enable_cxx_flags"; then
2868 for f in $enable_cxx_flags; do
2869 case "$f" in
dca89719 2870 -fhonor-std) ;;
2871 -*) ;;
2872 *) # and we're trying to pass /what/ exactly?
2873 AC_MSG_ERROR([compiler flags start with a -]) ;;
68224f8d 2874 esac
2875 done
75f8cc74 2876 fi
2877
68224f8d 2878 EXTRA_CXX_FLAGS="$enable_cxx_flags"
2879 AC_MSG_RESULT($EXTRA_CXX_FLAGS)
2880 AC_SUBST(EXTRA_CXX_FLAGS)
3d8dde60 2881])
2882
68224f8d 2883
68224f8d 2884dnl
2885dnl Check to see if debugging libraries are to be built.
2886dnl
2887dnl --enable-libstdcxx-debug
2888dnl builds a separate set of debugging libraries in addition to the
2889dnl normal (shared, static) libstdc++ binaries.
2890dnl
2891dnl --disable-libstdcxx-debug
2892dnl builds only one (non-debug) version of libstdc++.
2893dnl
2894dnl --enable-libstdcxx-debug-flags=FLAGS
2895dnl iff --enable-debug == yes, then use FLAGS to build the debug library.
2896dnl
2897dnl + Usage: GLIBCXX_ENABLE_DEBUG[(DEFAULT)]
2898dnl Where DEFAULT is either `yes' or `no'.
2899dnl
2ad02b6c 2900AC_DEFUN([GLIBCXX_ENABLE_DEBUG], [
68224f8d 2901 AC_MSG_CHECKING([for additional debug build])
2902 GLIBCXX_ENABLE(libstdcxx-debug,$1,,[build extra debug library])
2903 AC_MSG_RESULT($enable_libstdcxx_debug)
11764568 2904 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_DEBUG, test $enable_libstdcxx_debug = yes)
b9e8095b 2905])
2906
2907
df4b504c 2908dnl
68224f8d 2909dnl Check for explicit debug flags.
df4b504c 2910dnl
68224f8d 2911dnl --enable-libstdcxx-debug-flags='-O1'
2912dnl is a general method for passing flags to be used when
5506efaf 2913dnl building debug libraries with --enable-libstdcxx-debug.
df4b504c 2914dnl
68224f8d 2915dnl --disable-libstdcxx-debug-flags does nothing.
2916dnl + Usage: GLIBCXX_ENABLE_DEBUG_FLAGS(default flags)
2917dnl If "default flags" is an empty string, the effect is the same
2918dnl as --disable or --enable=no.
2919dnl
2ad02b6c 2920AC_DEFUN([GLIBCXX_ENABLE_DEBUG_FLAGS], [
68224f8d 2921 GLIBCXX_ENABLE(libstdcxx-debug-flags,[$1],[=FLAGS],
2922 [pass compiler FLAGS when building debug library],
2923 [case "x$enable_libstdcxx_debug_flags" in
2924 xno | x) enable_libstdcxx_debug_flags= ;;
2925 x-*) ;;
2926 *) AC_MSG_ERROR(_g_switch needs compiler flags as arguments) ;;
2927 esac])
2928
2929 # Option parsed, now set things appropriately
2930 DEBUG_FLAGS="$enable_libstdcxx_debug_flags"
2931 AC_SUBST(DEBUG_FLAGS)
2932
2933 AC_MSG_NOTICE([Debug build flags set to $DEBUG_FLAGS])
df4b504c 2934])
2935
2936
11764568 2937dnl
2938dnl Check if the user only wants a freestanding library implementation.
2939dnl
2940dnl --disable-hosted-libstdcxx will turn off most of the library build,
2941dnl installing only the headers required by [17.4.1.3] and the language
2942dnl support library. More than that will be built (to keep the Makefiles
2943dnl conveniently clean), but not installed.
2944dnl
2945dnl Sets:
2946dnl is_hosted (yes/no)
2947dnl
c3bc94d9 2948dnl Defines:
2949dnl _GLIBCXX_HOSTED (always defined, either to 1 or 0)
2950dnl
2ad02b6c 2951AC_DEFUN([GLIBCXX_ENABLE_HOSTED], [
11764568 2952 AC_ARG_ENABLE([hosted-libstdcxx],
2953 AC_HELP_STRING([--disable-hosted-libstdcxx],
dca89719 2954 [only build freestanding C++ runtime support]),,
ece3a793 2955 [case "$host" in
dca89719 2956 arm*-*-symbianelf*)
ece3a793 2957 enable_hosted_libstdcxx=no
2958 ;;
dca89719 2959 *)
ece3a793 2960 enable_hosted_libstdcxx=yes
2961 ;;
2962 esac])
11764568 2963 if test "$enable_hosted_libstdcxx" = no; then
2964 AC_MSG_NOTICE([Only freestanding libraries will be built])
2965 is_hosted=no
c3bc94d9 2966 hosted_define=0
11764568 2967 enable_abi_check=no
2968 enable_libstdcxx_pch=no
2969 else
2970 is_hosted=yes
c3bc94d9 2971 hosted_define=1
11764568 2972 fi
2973 GLIBCXX_CONDITIONAL(GLIBCXX_HOSTED, test $is_hosted = yes)
c3bc94d9 2974 AC_DEFINE_UNQUOTED(_GLIBCXX_HOSTED, $hosted_define,
2975 [Define to 1 if a full hosted library is built, or 0 if freestanding.])
11764568 2976])
2977
2978
d866c65d 2979dnl
2980dnl Check if the user wants a non-verbose library implementation.
2981dnl
2982dnl --disable-libstdcxx-verbose will turn off descriptive messages to
2983dnl standard error on termination.
2984dnl
2985dnl Defines:
2986dnl _GLIBCXX_VERBOSE (always defined, either to 1 or 0)
2987dnl
2988AC_DEFUN([GLIBCXX_ENABLE_VERBOSE], [
2989 AC_ARG_ENABLE([libstdcxx-verbose],
2990 AC_HELP_STRING([--disable-libstdcxx-verbose],
2991 [disable termination messages to standard error]),,
2992 [enable_libstdcxx_verbose=yes])
2993 if test x"$enable_libstdcxx_verbose" = xyes; then
2994 verbose_define=1
2995 else
2996 AC_MSG_NOTICE([verbose termination messages are disabled])
2997 verbose_define=0
2998 fi
2999 AC_DEFINE_UNQUOTED(_GLIBCXX_VERBOSE, $verbose_define,
3000 [Define to 1 if a verbose library is built, or 0 otherwise.])
3001])
3002
3003
6b6f8d4d 3004dnl
c586733c 3005dnl Check for template specializations for the 'long long' type.
7bdf0491 3006dnl The result determines only whether 'long long' I/O is enabled; things
3007dnl like numeric_limits<> specializations are always available.
6b6f8d4d 3008dnl
5a64d8cf 3009dnl --enable-long-long defines _GLIBCXX_USE_LONG_LONG
3010dnl --disable-long-long leaves _GLIBCXX_USE_LONG_LONG undefined
3011dnl + Usage: GLIBCXX_ENABLE_LONG_LONG[(DEFAULT)]
68224f8d 3012dnl Where DEFAULT is either `yes' or `no'.
6b6f8d4d 3013dnl
2ad02b6c 3014AC_DEFUN([GLIBCXX_ENABLE_LONG_LONG], [
c586733c 3015 GLIBCXX_ENABLE(long-long,$1,,[enable template specializations for 'long long'])
68224f8d 3016 if test $enable_long_long = yes; then
dca89719 3017 AC_DEFINE(_GLIBCXX_USE_LONG_LONG, 1,
3018 [Define if code specialized for long long should be used.])
6b6f8d4d 3019 fi
c586733c 3020 AC_MSG_CHECKING([for enabled long long specializations])
3021 AC_MSG_RESULT([$enable_long_long])
3022])
3023
3024
a9c001cb 3025dnl
3026dnl Check for decimal floating point.
3027dnl See:
3028dnl http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html#Decimal-Float
3029dnl
3030dnl This checks to see if the host supports decimal floating point types.
3031dnl
3032dnl Defines:
3033dnl _GLIBCXX_USE_DECIMAL_FLOAT
3034dnl
3035AC_DEFUN([GLIBCXX_ENABLE_DECIMAL_FLOAT], [
3036
3037 # Fake what AC_TRY_COMPILE does, without linking as this is
3038 # unnecessary for this test.
3039
3040 cat > conftest.$ac_ext << EOF
3041[#]line __oline__ "configure"
3042int main()
3043{
3044 _Decimal32 d1;
3045 _Decimal64 d2;
3046 _Decimal128 d3;
3047 return 0;
3048}
3049EOF
3050
3051 AC_MSG_CHECKING([for ISO/IEC TR 24733 ])
3052 if AC_TRY_EVAL(ac_compile); then
3053 AC_DEFINE(_GLIBCXX_USE_DECIMAL_FLOAT, 1,
3054 [Define if ISO/IEC TR 24733 decimal floating point types are supported on this host.])
3055 enable_dfp=yes
3056 else
3057 enable_dfp=no
3058 fi
3059 AC_MSG_RESULT($enable_dfp)
3060 rm -f conftest*
3061])
3062
a3ee70c2 3063dnl
3064dnl Check for GNU 128-bit integer and floating point types.
3065dnl
3066dnl Note: also checks that the types aren't standard types.
3067dnl
3068dnl Defines:
3069dnl _GLIBCXX_USE_INT128
e3eb6eff 3070dnl ENABLE_FLOAT128
a3ee70c2 3071dnl
3072AC_DEFUN([GLIBCXX_ENABLE_INT128_FLOAT128], [
3073
3074 AC_LANG_SAVE
3075 AC_LANG_CPLUSPLUS
3076
3077 # Fake what AC_TRY_COMPILE does, without linking as this is
3078 # unnecessary for this test.
3079
3080 cat > conftest.$ac_ext << EOF
3081[#]line __oline__ "configure"
3082template<typename T1, typename T2>
3083 struct same
3084 { typedef T2 type; };
3085
3086template<typename T>
3087 struct same<T, T>;
3088
3089int main()
3090{
52628f41 3091 typename same<long, __int128>::type i1;
3092 typename same<long long, __int128>::type i2;
a3ee70c2 3093}
3094EOF
3095
52628f41 3096 AC_MSG_CHECKING([for __int128])
a3ee70c2 3097 if AC_TRY_EVAL(ac_compile); then
3098 AC_DEFINE(_GLIBCXX_USE_INT128, 1,
52628f41 3099 [Define if __int128 is supported on this host.])
a3ee70c2 3100 enable_int128=yes
3101 else
3102 enable_int128=no
3103 fi
3104 AC_MSG_RESULT($enable_int128)
3105 rm -f conftest*
3106
3107 cat > conftest.$ac_ext << EOF
3108[#]line __oline__ "configure"
3109template<typename T1, typename T2>
3110 struct same
3111 { typedef T2 type; };
3112
3113template<typename T>
3114 struct same<T, T>;
3115
3116int main()
3117{
0559575c 3118 typename same<double, __float128>::type f1;
a3ee70c2 3119 typename same<long double, __float128>::type f2;
3120}
3121EOF
3122
3123 AC_MSG_CHECKING([for __float128])
3124 if AC_TRY_EVAL(ac_compile); then
a3ee70c2 3125 enable_float128=yes
3126 else
3127 enable_float128=no
3128 fi
3129 AC_MSG_RESULT($enable_float128)
e3eb6eff 3130 GLIBCXX_CONDITIONAL(ENABLE_FLOAT128, test $enable_float128 = yes)
a3ee70c2 3131 rm -f conftest*
3132
3133 AC_LANG_RESTORE
3134])
3135
c586733c 3136dnl
3137dnl Check for template specializations for the 'wchar_t' type.
3138dnl
3139dnl --enable-wchar_t defines _GLIBCXX_USE_WCHAR_T
3140dnl --disable-wchar_t leaves _GLIBCXX_USE_WCHAR_T undefined
3141dnl + Usage: GLIBCXX_ENABLE_WCHAR_T[(DEFAULT)]
3142dnl Where DEFAULT is either `yes' or `no'.
3143dnl
21b22bc5 3144dnl Necessary support must also be present.
c586733c 3145dnl
3146AC_DEFUN([GLIBCXX_ENABLE_WCHAR_T], [
3147 GLIBCXX_ENABLE(wchar_t,$1,,[enable template specializations for 'wchar_t'])
21b22bc5 3148
3149 # Test wchar.h for mbstate_t, which is needed for char_traits and fpos.
3150 AC_CHECK_HEADERS(wchar.h, ac_has_wchar_h=yes, ac_has_wchar_h=no)
3151 AC_MSG_CHECKING([for mbstate_t])
3152 AC_TRY_COMPILE([#include <wchar.h>],
3153 [mbstate_t teststate;],
3154 have_mbstate_t=yes, have_mbstate_t=no)
3155 AC_MSG_RESULT($have_mbstate_t)
3156 if test x"$have_mbstate_t" = xyes; then
3157 AC_DEFINE(HAVE_MBSTATE_T,1,[Define if mbstate_t exists in wchar.h.])
3158 fi
3159
0d162e5b 3160 # Test it always, for use in GLIBCXX_ENABLE_C99, together with
3161 # ac_has_wchar_h.
3162 AC_CHECK_HEADERS(wctype.h, ac_has_wctype_h=yes, ac_has_wctype_h=no)
dca89719 3163
21b22bc5 3164 if test x"$enable_wchar_t" = x"yes"; then
3165
3166 AC_LANG_SAVE
3167 AC_LANG_CPLUSPLUS
dca89719 3168
21b22bc5 3169 if test x"$ac_has_wchar_h" = xyes &&
3170 test x"$ac_has_wctype_h" = xyes; then
3171 AC_TRY_COMPILE([#include <wchar.h>
dca89719 3172 #include <stddef.h>
3173 wint_t i;
21b22bc5 3174 long l = WEOF;
3175 long j = WCHAR_MIN;
3176 long k = WCHAR_MAX;
dca89719 3177 namespace test
3178 {
21b22bc5 3179 using ::btowc;
3180 using ::fgetwc;
3181 using ::fgetws;
3182 using ::fputwc;
3183 using ::fputws;
3184 using ::fwide;
dca89719 3185 using ::fwprintf;
21b22bc5 3186 using ::fwscanf;
3187 using ::getwc;
3188 using ::getwchar;
dca89719 3189 using ::mbrlen;
3190 using ::mbrtowc;
3191 using ::mbsinit;
3192 using ::mbsrtowcs;
21b22bc5 3193 using ::putwc;
3194 using ::putwchar;
dca89719 3195 using ::swprintf;
3196 using ::swscanf;
21b22bc5 3197 using ::ungetwc;
dca89719 3198 using ::vfwprintf;
3199 using ::vswprintf;
3200 using ::vwprintf;
3201 using ::wcrtomb;
3202 using ::wcscat;
3203 using ::wcschr;
3204 using ::wcscmp;
3205 using ::wcscoll;
3206 using ::wcscpy;
3207 using ::wcscspn;
3208 using ::wcsftime;
21b22bc5 3209 using ::wcslen;
dca89719 3210 using ::wcsncat;
3211 using ::wcsncmp;
3212 using ::wcsncpy;
21b22bc5 3213 using ::wcspbrk;
dca89719 3214 using ::wcsrchr;
3215 using ::wcsrtombs;
3216 using ::wcsspn;
21b22bc5 3217 using ::wcsstr;
dca89719 3218 using ::wcstod;
3219 using ::wcstok;
21b22bc5 3220 using ::wcstol;
dca89719 3221 using ::wcstoul;
3222 using ::wcsxfrm;
3223 using ::wctob;
21b22bc5 3224 using ::wmemchr;
3225 using ::wmemcmp;
3226 using ::wmemcpy;
3227 using ::wmemmove;
3228 using ::wmemset;
dca89719 3229 using ::wprintf;
3230 using ::wscanf;
21b22bc5 3231 }
3232 ],[],[], [enable_wchar_t=no])
3233 else
3234 enable_wchar_t=no
3235 fi
3236
3237 AC_LANG_RESTORE
3238 fi
3239
3240 if test x"$enable_wchar_t" = x"yes"; then
d64903a9 3241 AC_DEFINE(_GLIBCXX_USE_WCHAR_T, 1,
dca89719 3242 [Define if code specialized for wchar_t should be used.])
c586733c 3243 fi
21b22bc5 3244
c586733c 3245 AC_MSG_CHECKING([for enabled wchar_t specializations])
3246 AC_MSG_RESULT([$enable_wchar_t])
6b6f8d4d 3247])
3248
3249
0e97825d 3250dnl
68224f8d 3251dnl Check to see if building and using a C++ precompiled header can be done.
6ff3baa3 3252dnl
68224f8d 3253dnl --enable-libstdcxx-pch=yes
3254dnl default, this shows intent to use stdc++.h.gch If it looks like it
3255dnl may work, after some light-hearted attempts to puzzle out compiler
3256dnl support, flip bits on in include/Makefile.am
e3bb8f1a 3257dnl
68224f8d 3258dnl --disable-libstdcxx-pch
3259dnl turns off attempts to use or build stdc++.h.gch.
0194306c 3260dnl
68224f8d 3261dnl Substs:
3262dnl glibcxx_PCHFLAGS
0194306c 3263dnl
2ad02b6c 3264AC_DEFUN([GLIBCXX_ENABLE_PCH], [
68224f8d 3265 GLIBCXX_ENABLE(libstdcxx-pch,$1,,[build pre-compiled libstdc++ headers])
68224f8d 3266 if test $enable_libstdcxx_pch = yes; then
3267 AC_CACHE_CHECK([for compiler with PCH support],
3268 [glibcxx_cv_prog_CXX_pch],
3269 [ac_save_CXXFLAGS="$CXXFLAGS"
3270 CXXFLAGS="$CXXFLAGS -Werror -Winvalid-pch -Wno-deprecated"
3271 AC_LANG_SAVE
3272 AC_LANG_CPLUSPLUS
3273 echo '#include <math.h>' > conftest.h
3274 if $CXX $CXXFLAGS $CPPFLAGS -x c++-header conftest.h \
dca89719 3275 -o conftest.h.gch 1>&5 2>&1 &&
3276 echo '#error "pch failed"' > conftest.h &&
3277 echo '#include "conftest.h"' > conftest.cc &&
68224f8d 3278 $CXX -c $CXXFLAGS $CPPFLAGS conftest.cc 1>&5 2>&1 ;
3279 then
dca89719 3280 glibcxx_cv_prog_CXX_pch=yes
68224f8d 3281 else
dca89719 3282 glibcxx_cv_prog_CXX_pch=no
68224f8d 3283 fi
3284 rm -f conftest*
3285 CXXFLAGS=$ac_save_CXXFLAGS
3286 AC_LANG_RESTORE
3287 ])
3288 enable_libstdcxx_pch=$glibcxx_cv_prog_CXX_pch
a167a2a4 3289 fi
0617d50e 3290
edf9c5a2 3291 AC_MSG_CHECKING([for enabled PCH])
3292 AC_MSG_RESULT([$enable_libstdcxx_pch])
3293
11764568 3294 GLIBCXX_CONDITIONAL(GLIBCXX_BUILD_PCH, test $enable_libstdcxx_pch = yes)
68224f8d 3295 if test $enable_libstdcxx_pch = yes; then
6482a45c 3296 glibcxx_PCHFLAGS="-include bits/stdc++.h"
a167a2a4 3297 else
68224f8d 3298 glibcxx_PCHFLAGS=""
3a278579 3299 fi
68224f8d 3300 AC_SUBST(glibcxx_PCHFLAGS)
3a278579 3301])
3302
08078d47 3303
3ba82d60 3304dnl
3305dnl Check for atomic builtins.
3306dnl See:
f06b9073 3307dnl http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
3ba82d60 3308dnl
3309dnl This checks to see if the host supports the compiler-generated
dca89719 3310dnl builtins for atomic operations for various integral sizes. Note, this
367b2e9f 3311dnl is intended to be an all-or-nothing switch, so all the atomic operations
3312dnl that are used should be checked.
3ba82d60 3313dnl
3314dnl Note:
cbdc6ff0 3315dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
3ba82d60 3316dnl
3ba82d60 3317AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
3ba82d60 3318 AC_LANG_SAVE
3319 AC_LANG_CPLUSPLUS
367b2e9f 3320 old_CXXFLAGS="$CXXFLAGS"
cbdc6ff0 3321
3322 # Do link tests if possible, instead asm tests, limited to some platforms
3323 # see discussion in PR target/40134, PR libstdc++/40133 and the thread
3324 # starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
3325 atomic_builtins_link_tests=no
3326 if test x$gcc_no_link != xyes; then
3327 # Can do link tests. Limit to some tested platforms
3328 case "$host" in
3329 *-*-linux* | *-*-uclinux* | *-*-kfreebsd*-gnu | *-*-gnu*)
3330 atomic_builtins_link_tests=yes
dca89719 3331 ;;
cbdc6ff0 3332 esac
3333 fi
3334
3335 if test x$atomic_builtins_link_tests = xyes; then
3336
3337 # Do link tests.
3338
3339 CXXFLAGS="$CXXFLAGS -fno-exceptions"
3340
3341 AC_MSG_CHECKING([for atomic builtins for bool])
3342 AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
3343 AC_TRY_LINK(
3344 [ ],
3345 [typedef bool atomic_type;
3346 atomic_type c1;
3347 atomic_type c2;
f06b9073 3348 atomic_type c3(0);
dfc865ba 3349 // N.B. __atomic_fetch_add is not supported for bool.
f06b9073 3350 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3351 __ATOMIC_RELAXED);
f06b9073 3352 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3353 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3354 ],
cbdc6ff0 3355 [glibcxx_cv_atomic_bool=yes],
3356 [glibcxx_cv_atomic_bool=no])
dca89719 3357 ])
cbdc6ff0 3358 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
3359
3360 AC_MSG_CHECKING([for atomic builtins for short])
3361 AC_CACHE_VAL(glibcxx_cv_atomic_short, [
3362 AC_TRY_LINK(
3363 [ ],
3364 [typedef short atomic_type;
3365 atomic_type c1;
3366 atomic_type c2;
f06b9073 3367 atomic_type c3(0);
3368 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3369 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3370 __ATOMIC_RELAXED);
f06b9073 3371 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3372 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3373 ],
cbdc6ff0 3374 [glibcxx_cv_atomic_short=yes],
3375 [glibcxx_cv_atomic_short=no])
dca89719 3376 ])
cbdc6ff0 3377 AC_MSG_RESULT($glibcxx_cv_atomic_short)
3378
3379 AC_MSG_CHECKING([for atomic builtins for int])
3380 AC_CACHE_VAL(glibcxx_cv_atomic_int, [
3381 AC_TRY_LINK(
3382 [ ],
3383 [typedef int atomic_type;
3384 atomic_type c1;
3385 atomic_type c2;
f06b9073 3386 atomic_type c3(0);
3387 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3388 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3389 __ATOMIC_RELAXED);
f06b9073 3390 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3391 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3392 ],
cbdc6ff0 3393 [glibcxx_cv_atomic_int=yes],
3394 [glibcxx_cv_atomic_int=no])
dca89719 3395 ])
cbdc6ff0 3396 AC_MSG_RESULT($glibcxx_cv_atomic_int)
3397
3398 AC_MSG_CHECKING([for atomic builtins for long long])
3399 AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
3400 AC_TRY_LINK(
3401 [ ],
3402 [typedef long long atomic_type;
3403 atomic_type c1;
3404 atomic_type c2;
f06b9073 3405 atomic_type c3(0);
3406 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3407 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3408 __ATOMIC_RELAXED);
f06b9073 3409 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3410 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3411 ],
cbdc6ff0 3412 [glibcxx_cv_atomic_long_long=yes],
3413 [glibcxx_cv_atomic_long_long=no])
dca89719 3414 ])
cbdc6ff0 3415 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3416
3417 else
3418
3419 # Do asm tests.
3420
367b2e9f 3421 # Compile unoptimized.
3422 CXXFLAGS='-O0 -S'
3423
cbdc6ff0 3424 # Fake what AC_TRY_COMPILE does.
3ba82d60 3425
3ba82d60 3426 cat > conftest.$ac_ext << EOF
3427[#]line __oline__ "configure"
3428int main()
e6dbf630 3429{
3430 typedef bool atomic_type;
3431 atomic_type c1;
3432 atomic_type c2;
f06b9073 3433 atomic_type c3(0);
dfc865ba 3434 // N.B. __atomic_fetch_add is not supported for bool.
f06b9073 3435 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3436 __ATOMIC_RELAXED);
f06b9073 3437 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3438 __atomic_load_n(&c1, __ATOMIC_RELAXED);
0559575c 3439
e6dbf630 3440 return 0;
3441}
3442EOF
3443
3444 AC_MSG_CHECKING([for atomic builtins for bool])
3445 if AC_TRY_EVAL(ac_compile); then
ae5449f8 3446 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
dca89719 3447 glibcxx_cv_atomic_bool=no
e6dbf630 3448 else
dca89719 3449 glibcxx_cv_atomic_bool=yes
e6dbf630 3450 fi
3451 fi
cbdc6ff0 3452 AC_MSG_RESULT($glibcxx_cv_atomic_bool)
e6dbf630 3453 rm -f conftest*
3454
3455 cat > conftest.$ac_ext << EOF
3456[#]line __oline__ "configure"
3457int main()
3458{
3459 typedef short atomic_type;
3460 atomic_type c1;
3461 atomic_type c2;
f06b9073 3462 atomic_type c3(0);
3463 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3464 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3465 __ATOMIC_RELAXED);
f06b9073 3466 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3467 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3468
e6dbf630 3469 return 0;
3470}
3471EOF
3472
3473 AC_MSG_CHECKING([for atomic builtins for short])
3474 if AC_TRY_EVAL(ac_compile); then
ae5449f8 3475 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
dca89719 3476 glibcxx_cv_atomic_short=no
e6dbf630 3477 else
dca89719 3478 glibcxx_cv_atomic_short=yes
e6dbf630 3479 fi
3480 fi
cbdc6ff0 3481 AC_MSG_RESULT($glibcxx_cv_atomic_short)
e6dbf630 3482 rm -f conftest*
3483
3484 cat > conftest.$ac_ext << EOF
3485[#]line __oline__ "configure"
3486int main()
3ba82d60 3487{
dca89719 3488 // NB: _Atomic_word not necessarily int.
3ba82d60 3489 typedef int atomic_type;
3490 atomic_type c1;
3491 atomic_type c2;
f06b9073 3492 atomic_type c3(0);
3493 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3494 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3495 __ATOMIC_RELAXED);
f06b9073 3496 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3497 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3498
367b2e9f 3499 return 0;
3500}
3501EOF
3502
3503 AC_MSG_CHECKING([for atomic builtins for int])
3504 if AC_TRY_EVAL(ac_compile); then
ae5449f8 3505 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
dca89719 3506 glibcxx_cv_atomic_int=no
367b2e9f 3507 else
dca89719 3508 glibcxx_cv_atomic_int=yes
367b2e9f 3509 fi
3510 fi
cbdc6ff0 3511 AC_MSG_RESULT($glibcxx_cv_atomic_int)
367b2e9f 3512 rm -f conftest*
3513
3514 cat > conftest.$ac_ext << EOF
3515[#]line __oline__ "configure"
3516int main()
3517{
e6dbf630 3518 typedef long long atomic_type;
367b2e9f 3519 atomic_type c1;
3520 atomic_type c2;
f06b9073 3521 atomic_type c3(0);
3522 __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
3523 __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
0559575c 3524 __ATOMIC_RELAXED);
f06b9073 3525 __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
3526 __atomic_load_n(&c1, __ATOMIC_RELAXED);
3527
367b2e9f 3528 return 0;
3ba82d60 3529}
3530EOF
367b2e9f 3531
e6dbf630 3532 AC_MSG_CHECKING([for atomic builtins for long long])
3ba82d60 3533 if AC_TRY_EVAL(ac_compile); then
ae5449f8 3534 if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
dca89719 3535 glibcxx_cv_atomic_long_long=no
3ba82d60 3536 else
dca89719 3537 glibcxx_cv_atomic_long_long=yes
3ba82d60 3538 fi
3539 fi
cbdc6ff0 3540 AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
3ba82d60 3541 rm -f conftest*
3542
cbdc6ff0 3543 fi
e6dbf630 3544
367b2e9f 3545 CXXFLAGS="$old_CXXFLAGS"
3546 AC_LANG_RESTORE
3547
9578c8c3 3548 # Set atomicity_dir to builtins if all but the long long test above passes,
3549 # or if the builtins were already chosen (e.g. by configure.host).
3550 if { test "$glibcxx_cv_atomic_bool" = yes \
d20923cf 3551 && test "$glibcxx_cv_atomic_short" = yes \
9578c8c3 3552 && test "$glibcxx_cv_atomic_int" = yes; } \
3553 || test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then
06bc5cca 3554 AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS, 1,
3555 [Define if the compiler supports C++11 atomics.])
367b2e9f 3556 atomicity_dir=cpu/generic/atomicity_builtins
3557 fi
3558
3559 # If still generic, set to mutex.
3ba82d60 3560 if test $atomicity_dir = "cpu/generic" ; then
367b2e9f 3561 atomicity_dir=cpu/generic/atomicity_mutex
6bb3458a 3562 AC_MSG_WARN([No native atomic operations are provided for this platform.])
f2c7d583 3563 if test "x$target_thread_file" = xsingle; then
dca89719 3564 AC_MSG_WARN([They cannot be faked when thread support is disabled.])
3565 AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
6bb3458a 3566 else
dca89719 3567 AC_MSG_WARN([They will be faked using a mutex.])
3568 AC_MSG_WARN([Performance of certain classes will degrade as a result.])
6bb3458a 3569 fi
3ba82d60 3570 fi
367b2e9f 3571
3ba82d60 3572])
3573
c8fb3443 3574dnl
3575dnl Set default lock policy for synchronizing shared_ptr reference counting.
3576dnl
3577dnl --with-libstdcxx-lock-policy=auto
3578dnl Use atomic operations for shared_ptr reference counting only if
3579dnl the default target supports atomic compare-and-swap.
3580dnl --with-libstdcxx-lock-policy=atomic
3581dnl Use atomic operations for shared_ptr reference counting.
3582dnl --with-libstdcxx-lock-policy=mutex
3583dnl Use a mutex to synchronize shared_ptr reference counting.
3584dnl
3585dnl This controls the value of __gnu_cxx::__default_lock_policy, which
3586dnl determines how shared_ptr reference counts are synchronized.
3587dnl The option "atomic" means that atomic operations should be used,
3588dnl "mutex" means that a mutex will be used. The default option, "auto",
3589dnl will check if the target supports the compiler-generated builtins
3590dnl for atomic compare-and-swap operations for 2-byte and 4-byte integers,
3591dnl and will use "atomic" if supported, "mutex" otherwise.
3592dnl This option is ignored if the thread model used by GCC is "single",
3593dnl as no synchronization is used at all in that case.
3594dnl This option affects the library ABI (except in the "single" thread model).
3595dnl
3596dnl Defines _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY to 1 if atomics should be used.
3597dnl
3598AC_DEFUN([GLIBCXX_ENABLE_LOCK_POLICY], [
3599
3600 AC_ARG_WITH([libstdcxx-lock-policy],
3601 AC_HELP_STRING([--with-libstdcxx-lock-policy={atomic,mutex,auto}],
3602 [synchronization policy for shared_ptr reference counting [default=auto]]),
3603 [libstdcxx_atomic_lock_policy=$withval],
3604 [libstdcxx_atomic_lock_policy=auto])
3605
3606 case "$libstdcxx_atomic_lock_policy" in
3607 atomic|mutex|auto) ;;
3608 *) AC_MSG_ERROR([Invalid argument for --with-libstdcxx-lock-policy]) ;;
3609 esac
3610 AC_MSG_CHECKING([for lock policy for shared_ptr reference counts])
3611
3612 if test x"$libstdcxx_atomic_lock_policy" = x"auto"; then
3613 AC_LANG_SAVE
3614 AC_LANG_CPLUSPLUS
3615 ac_save_CXXFLAGS="$CXXFLAGS"
3616
3617 dnl Why do we care about 2-byte CAS on targets with 4-byte _Atomic_word?!
3618 AC_TRY_COMPILE([
3619 #if ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
3620 # error "No 2-byte compare-and-swap"
3621 #elif ! defined __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
3622 # error "No 4-byte compare-and-swap"
3623 #endif
3624 ],,
3625 [libstdcxx_atomic_lock_policy=atomic],
3626 [libstdcxx_atomic_lock_policy=mutex])
3627 AC_LANG_RESTORE
3628 CXXFLAGS="$ac_save_CXXFLAGS"
3629 fi
3630
3631 if test x"$libstdcxx_atomic_lock_policy" = x"atomic"; then
3632 AC_MSG_RESULT(atomic)
3633 AC_DEFINE(HAVE_ATOMIC_LOCK_POLICY,1,
3634 [Defined if shared_ptr reference counting should use atomic operations.])
3635 else
3636 AC_MSG_RESULT(mutex)
3637 fi
3638
3639])
3ba82d60 3640
4ffa185b 3641dnl
3642dnl Allow visibility attributes to be used on namespaces, objects, etc.
3643dnl
69e5eea5 3644dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes.
3645dnl --disable-libstdcxx-visibility turns off all use of visibility attributes.
3646dnl + Usage: GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY[(DEFAULT)]
4ffa185b 3647dnl Where DEFAULT is 'yes'.
3648dnl
69e5eea5 3649AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_VISIBILITY], [
3650GLIBCXX_ENABLE(libstdcxx-visibility,$1,,[enables visibility safe usage])
4ffa185b 3651
69e5eea5 3652if test x$enable_libstdcxx_visibility = xyes ; then
4ffa185b 3653 dnl all hail libgfortran
3654 dnl Check whether the target supports hidden visibility.
3655 AC_CACHE_CHECK([whether the target supports hidden visibility],
6992582a 3656 glibcxx_cv_have_attribute_visibility, [
4ffa185b 3657 save_CFLAGS="$CFLAGS"
3658 CFLAGS="$CFLAGS -Werror"
3659 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
6992582a 3660 [], glibcxx_cv_have_attribute_visibility=yes,
3661 glibcxx_cv_have_attribute_visibility=no)
4ffa185b 3662 CFLAGS="$save_CFLAGS"])
6992582a 3663 if test $glibcxx_cv_have_attribute_visibility = no; then
69e5eea5 3664 enable_libstdcxx_visibility=no
4ffa185b 3665 fi
3666fi
3667
69e5eea5 3668GLIBCXX_CONDITIONAL(ENABLE_VISIBILITY, test $enable_libstdcxx_visibility = yes)
3669AC_MSG_NOTICE([visibility supported: $enable_libstdcxx_visibility])
4ffa185b 3670])
3671
3672
6acf9653 3673dnl
3674dnl Add version tags to symbols in shared library (or not), additionally
3675dnl marking other symbols as private/local (or not).
3676dnl
377fc3e8 3677dnl Sets libtool_VERSION, and determines shared library SONAME.
3678dnl
3679dnl This depends on GLIBCXX CHECK_LINKER_FEATURES, but without it assumes no.
3680dnl
00c7100f 3681dnl --enable-symvers=style adds a version script to the linker call when
3682dnl creating the shared library. The choice of version script is
3683dnl controlled by 'style'.
6acf9653 3684dnl --disable-symvers does not.
377fc3e8 3685dnl
5a64d8cf 3686dnl + Usage: GLIBCXX_ENABLE_SYMVERS[(DEFAULT)]
68224f8d 3687dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to
3688dnl choose a default style based on linker characteristics. Passing
3689dnl 'no' disables versioning.
3690dnl
2ad02b6c 3691AC_DEFUN([GLIBCXX_ENABLE_SYMVERS], [
68224f8d 3692
dae1a11c 3693GLIBCXX_ENABLE(symvers,$1,[[[=STYLE]]],
68224f8d 3694 [enables symbol versioning of the shared library],
55f10c87 3695 [permit yes|no|gnu|gnu-versioned-namespace|darwin|darwin-export|sun])
00c7100f 3696
5a64d8cf 3697# If we never went through the GLIBCXX_CHECK_LINKER_FEATURES macro, then we
77cbec55 3698# don't know enough about $LD to do tricks...
68224f8d 3699AC_REQUIRE([GLIBCXX_CHECK_LINKER_FEATURES])
55f10c87 3700# Sun style symbol versions needs GNU c++filt for make_sunver.pl to work
3701# with extern "C++" in version scripts.
3702AC_REQUIRE([GCC_PROG_GNU_CXXFILT])
3abf7e61 3703
3704# Turn a 'yes' into a suitable default.
3705if test x$enable_symvers = xyes ; then
b66527cc 3706 if test $enable_shared = no || test "x$LD" = x || test x$gcc_no_link = xyes; then
3abf7e61 3707 enable_symvers=no
3abf7e61 3708 else
871b22db 3709 if test $with_gnu_ld = yes ; then
7d804f04 3710 case ${target_os} in
dca89719 3711 hpux*)
3712 enable_symvers=no ;;
3713 *)
3714 enable_symvers=gnu ;;
7d804f04 3715 esac
871b22db 3716 else
3717 case ${target_os} in
dca89719 3718 darwin*)
871b22db 3719 enable_symvers=darwin ;;
55f10c87 3720 # Sun symbol versioning exists since Solaris 2.5.
3721 solaris2.[[5-9]]* | solaris2.1[[0-9]]*)
3722 # make_sunver.pl needs GNU c++filt to support extern "C++" in
3723 # version scripts, so disable symbol versioning if none can be
3724 # found.
3725 if test -z "$ac_cv_path_CXXFILT"; then
3726 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3727 AC_MSG_WARN([=== no GNU c++filt could be found.])
3728 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3729 enable_symvers=no
3730 else
3731 enable_symvers=sun
3732 fi
3733 ;;
dca89719 3734 *)
3735 enable_symvers=no ;;
871b22db 3736 esac
3737 fi
3abf7e61 3738 fi
6acf9653 3739fi
00c7100f 3740
871b22db 3741# Check to see if 'darwin' or 'darwin-export' can win.
3742if test x$enable_symvers = xdarwin-export ; then
3743 enable_symvers=darwin
3744fi
3745
55f10c87 3746# Check if 'sun' was requested on non-Solaris 2 platforms.
3747if test x$enable_symvers = xsun ; then
3748 case ${target_os} in
3749 solaris2*)
3750 # All fine.
3751 ;;
3752 *)
3753 # Unlikely to work.
3754 AC_MSG_WARN([=== You have requested Sun symbol versioning, but])
3755 AC_MSG_WARN([=== you are not targetting Solaris 2.])
3756 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3757 enable_symvers=no
3758 ;;
3759 esac
3760fi
3761
d414d318 3762# Check to see if 'gnu' can win.
dca89719 3763if test $enable_symvers = gnu ||
3764 test $enable_symvers = gnu-versioned-namespace ||
55f10c87 3765 test $enable_symvers = sun; then
d414d318 3766 # Check to see if libgcc_s exists, indicating that shared libgcc is possible.
43390bfe 3767 AC_MSG_CHECKING([for shared libgcc])
3768 ac_save_CFLAGS="$CFLAGS"
3769 CFLAGS=' -lgcc_s'
68224f8d 3770 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes, glibcxx_shared_libgcc=no)
43390bfe 3771 CFLAGS="$ac_save_CFLAGS"
71558bab 3772 if test $glibcxx_shared_libgcc = no; then
3773 cat > conftest.c <<EOF
3774int main (void) { return 0; }
3775EOF
3776changequote(,)dnl
3777 glibcxx_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
3778 -shared -shared-libgcc -o conftest.so \
3779 conftest.c -v 2>&1 >/dev/null \
3780 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'`
3781changequote([,])dnl
3782 rm -f conftest.c conftest.so
3783 if test x${glibcxx_libgcc_s_suffix+set} = xset; then
3784 CFLAGS=" -lgcc_s$glibcxx_libgcc_s_suffix"
3785 AC_TRY_LINK(, [return 0;], glibcxx_shared_libgcc=yes)
3786 CFLAGS="$ac_save_CFLAGS"
3787 fi
3788 fi
5a64d8cf 3789 AC_MSG_RESULT($glibcxx_shared_libgcc)
3abf7e61 3790
3abf7e61 3791 # For GNU ld, we need at least this version. The format is described in
3792 # GLIBCXX_CHECK_LINKER_FEATURES above.
3793 glibcxx_min_gnu_ld_version=21400
00c7100f 3794
d414d318 3795 # If no shared libgcc, can't win.
3796 if test $glibcxx_shared_libgcc != yes; then
3797 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3798 AC_MSG_WARN([=== you are not building a shared libgcc_s.])
3799 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3800 enable_symvers=no
55f10c87 3801 elif test $with_gnu_ld != yes && test $enable_symvers = sun; then
3802 : All interesting versions of Sun ld support sun style symbol versioning.
d414d318 3803 elif test $with_gnu_ld != yes ; then
6a3aad86 3804 # just fail for now
3abf7e61 3805 AC_MSG_WARN([=== You have requested GNU symbol versioning, but])
3806 AC_MSG_WARN([=== you are not using the GNU linker.])
3807 AC_MSG_WARN([=== Symbol versioning will be disabled.])
3808 enable_symvers=no
09ffaa43 3809 elif test $glibcxx_ld_is_gold = yes ; then
3810 : All versions of gold support symbol versioning.
3abf7e61 3811 elif test $glibcxx_gnu_ld_version -lt $glibcxx_min_gnu_ld_version ; then
3812 # The right tools, the right setup, but too old. Fallbacks?
3813 AC_MSG_WARN(=== Linker version $glibcxx_gnu_ld_version is too old for)
3814 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.)
3815 AC_MSG_WARN(=== You would need to upgrade your binutils to version)
3816 AC_MSG_WARN(=== $glibcxx_min_gnu_ld_version or later and rebuild GCC.)
4cce0a93 3817 AC_MSG_WARN([=== Symbol versioning will be disabled.])
6a3aad86 3818 enable_symvers=no
3819 fi
3820fi
3821
377fc3e8 3822# For libtool versioning info, format is CURRENT:REVISION:AGE
26909ed4 3823libtool_VERSION=6:26:0
377fc3e8 3824
3825# Everything parsed; figure out what files and settings to use.
00c7100f 3826case $enable_symvers in
6a3aad86 3827 no)
871b22db 3828 SYMVER_FILE=config/abi/pre/none.ver
68224f8d 3829 ;;
00c7100f 3830 gnu)
871b22db 3831 SYMVER_FILE=config/abi/pre/gnu.ver
dca89719 3832 AC_DEFINE(_GLIBCXX_SYMVER_GNU, 1,
3833 [Define to use GNU versioning in the shared library.])
3abf7e61 3834 ;;
1069247d 3835 gnu-versioned-namespace)
6f20076a 3836 libtool_VERSION=8:0:0
1069247d 3837 SYMVER_FILE=config/abi/pre/gnu-versioned-namespace.ver
dca89719 3838 AC_DEFINE(_GLIBCXX_SYMVER_GNU_NAMESPACE, 1,
3839 [Define to use GNU namespace versioning in the shared library.])
1069247d 3840 ;;
871b22db 3841 darwin)
3842 SYMVER_FILE=config/abi/pre/gnu.ver
dca89719 3843 AC_DEFINE(_GLIBCXX_SYMVER_DARWIN, 1,
3844 [Define to use darwin versioning in the shared library.])
68224f8d 3845 ;;
55f10c87 3846 sun)
3847 SYMVER_FILE=config/abi/pre/gnu.ver
dca89719 3848 AC_DEFINE(_GLIBCXX_SYMVER_SUN, 1,
3849 [Define to use Sun versioning in the shared library.])
55f10c87 3850 ;;
00c7100f 3851esac
3852
871b22db 3853if test x$enable_symvers != xno ; then
3854 AC_DEFINE(_GLIBCXX_SYMVER, 1,
3855 [Define to use symbol versioning in the shared library.])
3856fi
3857
551033af 3858AC_CACHE_CHECK([whether the target supports .symver directive],
3859 glibcxx_cv_have_as_symver_directive, [
3860 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
3861 [], glibcxx_cv_have_as_symver_directive=yes,
3862 glibcxx_cv_have_as_symver_directive=no)])
3863if test $glibcxx_cv_have_as_symver_directive = yes; then
3864 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
3865 [Define to 1 if the target assembler supports .symver directive.])
3866fi
3867
871b22db 3868AC_SUBST(SYMVER_FILE)
3869AC_SUBST(port_specific_symbol_files)
3870GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
3871GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU, test $enable_symvers = gnu)
1069247d 3872GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_GNU_NAMESPACE, test $enable_symvers = gnu-versioned-namespace)
871b22db 3873GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_DARWIN, test $enable_symvers = darwin)
55f10c87 3874GLIBCXX_CONDITIONAL(ENABLE_SYMVERS_SUN, test $enable_symvers = sun)
871b22db 3875AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers)
3876
55f10c87 3877if test $enable_symvers != no ; then
3878 case ${target_os} in
3879 # The Solaris 2 runtime linker doesn't support the GNU extension of
3880 # binding the same symbol to different versions
3881 solaris2*)
fb6822c1 3882 ;;
55f10c87 3883 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do.
3884 *)
44d2766e 3885 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1,
dca89719 3886 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.])
fb6822c1 3887 ;;
55f10c87 3888 esac
3889fi
55f10c87 3890
871b22db 3891# Now, set up compatibility support, if any.
e4371cce 3892# In addition, need this to deal with std::size_t mangling in
3893# src/compatibility.cc. In a perfect world, could use
3894# typeid(std::size_t).name()[0] to do direct substitution.
3895AC_MSG_CHECKING([for size_t as unsigned int])
3896ac_save_CFLAGS="$CFLAGS"
3897CFLAGS="-Werror"
dca89719 3898AC_TRY_COMPILE(, [__SIZE_TYPE__* stp; unsigned int* uip; stp = uip;],
3899 [glibcxx_size_t_is_i=yes], [glibcxx_size_t_is_i=no])
e4371cce 3900CFLAGS=$ac_save_CFLAGS
3901if test "$glibcxx_size_t_is_i" = yes; then
3902 AC_DEFINE(_GLIBCXX_SIZE_T_IS_UINT, 1, [Define if size_t is unsigned int.])
3903fi
3904AC_MSG_RESULT([$glibcxx_size_t_is_i])
3905
3906AC_MSG_CHECKING([for ptrdiff_t as int])
3907ac_save_CFLAGS="$CFLAGS"
3908CFLAGS="-Werror"
dca89719 3909AC_TRY_COMPILE(, [__PTRDIFF_TYPE__* ptp; int* ip; ptp = ip;],
3910 [glibcxx_ptrdiff_t_is_i=yes], [glibcxx_ptrdiff_t_is_i=no])
e4371cce 3911CFLAGS=$ac_save_CFLAGS
3912if test "$glibcxx_ptrdiff_t_is_i" = yes; then
3913 AC_DEFINE(_GLIBCXX_PTRDIFF_T_IS_INT, 1, [Define if ptrdiff_t is int.])
3914fi
3915AC_MSG_RESULT([$glibcxx_ptrdiff_t_is_i])
68224f8d 3916])
3917
3918
3919dnl
3920dnl Setup to use the gcc gthr.h thread-specific memory and mutex model.
3921dnl We must stage the required headers so that they will be installed
3922dnl with the library (unlike libgcc, the STL implementation is provided
3923dnl solely within headers). Since we must not inject random user-space
3924dnl macro names into user-provided C++ code, we first stage into <file>-in
3925dnl and process to <file> with an output command. The reason for a two-
3926dnl stage process here is to correctly handle $srcdir!=$objdir without
3927dnl having to write complex code (the sed commands to clean the macro
3928dnl namespace are complex and fragile enough as it is). We must also
3929dnl add a relative path so that -I- is supported properly.
3930dnl
017f22df 3931dnl Substs:
3932dnl thread_header
3933dnl
2ad02b6c 3934AC_DEFUN([GLIBCXX_ENABLE_THREADS], [
68224f8d 3935 AC_MSG_CHECKING([for thread model used by GCC])
f4a06a64 3936 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
68224f8d 3937 AC_MSG_RESULT([$target_thread_file])
017f22df 3938 GCC_AC_THREAD_HEADER([$target_thread_file])
68224f8d 3939])
3940
3941
add2055d 3942dnl
3943dnl Check if gthread implementation defines the types and functions
3944dnl required by the c++0x thread library. Conforming gthread
3945dnl implementations can define __GTHREADS_CXX0X to enable use with c++0x.
3946dnl
3b7b1092 3947dnl GLIBCXX_ENABLE_SYMVERS must be done before this.
3948dnl
add2055d 3949AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
3b7b1092 3950 GLIBCXX_ENABLE(libstdcxx-threads,auto,,[enable C++11 threads support])
3951
3952 if test x$enable_libstdcxx_threads = xauto ||
3953 test x$enable_libstdcxx_threads = xyes; then
3954
add2055d 3955 AC_LANG_SAVE
3956 AC_LANG_CPLUSPLUS
3957
3958 ac_save_CXXFLAGS="$CXXFLAGS"
630d52ca 3959 CXXFLAGS="$CXXFLAGS -fno-exceptions \
3960 -I${toplevel_srcdir}/libgcc -I${toplevel_builddir}/libgcc"
add2055d 3961
7a0b241e 3962 target_thread_file=`$CXX -v 2>&1 | sed -n 's/^Thread model: //p'`
3963 case $target_thread_file in
3964 posix)
3965 CXXFLAGS="$CXXFLAGS -DSUPPORTS_WEAK -DGTHREAD_USE_WEAK -D_PTHREADS"
3966 esac
3967
3968 AC_MSG_CHECKING([whether it can be safely assumed that mutex_timedlock is available])
24335a64 3969
3970 AC_TRY_COMPILE([#include <unistd.h>],
3971 [
7a0b241e 3972 // In case of POSIX threads check _POSIX_TIMEOUTS.
3973 #if (defined(_PTHREADS) \
0559575c 3974 && (!defined(_POSIX_TIMEOUTS) || _POSIX_TIMEOUTS <= 0))
24335a64 3975 #error
3976 #endif
3977 ], [ac_gthread_use_mutex_timedlock=1], [ac_gthread_use_mutex_timedlock=0])
3978
3979 AC_DEFINE_UNQUOTED(_GTHREAD_USE_MUTEX_TIMEDLOCK, $ac_gthread_use_mutex_timedlock,
0559575c 3980 [Define to 1 if mutex_timedlock is available.])
24335a64 3981
3982 if test $ac_gthread_use_mutex_timedlock = 1 ; then res_mutex_timedlock=yes ;
3983 else res_mutex_timedlock=no ; fi
3984 AC_MSG_RESULT([$res_mutex_timedlock])
3985
add2055d 3986 AC_MSG_CHECKING([for gthreads library])
3987
7a0b241e 3988 AC_TRY_COMPILE([#include "gthr.h"],
add2055d 3989 [
a4290503 3990 #ifndef __GTHREADS_CXX0X
3991 #error
3992 #endif
3efb5d22 3993 ], [ac_has_gthreads=yes], [ac_has_gthreads=no])
3b7b1092 3994 else
3995 ac_has_gthreads=no
3996 fi
add2055d 3997
3998 AC_MSG_RESULT([$ac_has_gthreads])
3999
4000 if test x"$ac_has_gthreads" = x"yes"; then
4001 AC_DEFINE(_GLIBCXX_HAS_GTHREADS, 1,
dca89719 4002 [Define if gthreads library is available.])
e6a8d251 4003
4004 # Also check for pthread_rwlock_t for std::shared_timed_mutex in C++14
4005 AC_CHECK_TYPE([pthread_rwlock_t],
4006 [AC_DEFINE([_GLIBCXX_USE_PTHREAD_RWLOCK_T], 1,
4007 [Define if POSIX read/write locks are available in <gthr.h>.])],
4008 [],
4009 [#include "gthr.h"])
add2055d 4010 fi
4011
4012 CXXFLAGS="$ac_save_CXXFLAGS"
4013 AC_LANG_RESTORE
4014])
4015
4016
68224f8d 4017# Check whether LC_MESSAGES is available in <locale.h>.
4018# Ulrich Drepper <drepper@cygnus.com>, 1995.
4019#
4020# This file file be copied and used freely without restrictions. It can
4021# be used in projects which are not available under the GNU Public License
4022# but which still want to provide support for the GNU gettext functionality.
4023# Please note that the actual code is *not* freely available.
2ad02b6c 4024AC_DEFUN([AC_LC_MESSAGES], [
68224f8d 4025 AC_CHECK_HEADER(locale.h, [
4026 AC_CACHE_CHECK([for LC_MESSAGES], ac_cv_val_LC_MESSAGES,
f40a62d0 4027 [AC_TRY_COMPILE([#include <locale.h>], [return LC_MESSAGES],
68224f8d 4028 ac_cv_val_LC_MESSAGES=yes, ac_cv_val_LC_MESSAGES=no)])
4029 if test $ac_cv_val_LC_MESSAGES = yes; then
dca89719 4030 AC_DEFINE(HAVE_LC_MESSAGES, 1,
4031 [Define if LC_MESSAGES is available in <locale.h>.])
68224f8d 4032 fi
4033 ])
4034])
4035
bdbf421c 4036dnl
4037dnl Check whether rdrand is supported in the assembler.
4038AC_DEFUN([GLIBCXX_CHECK_X86_RDRAND], [
4039 AC_MSG_CHECKING([for rdrand support in assembler])
65facd7d 4040 AC_CACHE_VAL(ac_cv_x86_rdrand, [
bdbf421c 4041 ac_cv_x86_rdrand=no
4042 case "$target" in
4043 i?86-*-* | \
4044 x86_64-*-*)
4045 AC_TRY_COMPILE(, [asm("rdrand %eax");],
4046 [ac_cv_x86_rdrand=yes], [ac_cv_x86_rdrand=no])
4047 esac
4048 ])
4049 if test $ac_cv_x86_rdrand = yes; then
4050 AC_DEFINE(_GLIBCXX_X86_RDRAND, 1,
4051 [ Defined if as can handle rdrand. ])
4052 fi
4053 AC_MSG_RESULT($ac_cv_x86_rdrand)
4054])
4055
91df033f 4056dnl
4057dnl Check whether rdseed is supported in the assembler.
4058AC_DEFUN([GLIBCXX_CHECK_X86_RDSEED], [
4059 AC_MSG_CHECKING([for rdseed support in assembler])
4060 AC_CACHE_VAL(ac_cv_x86_rdseed, [
4061 ac_cv_x86_rdseed=no
4062 case "$target" in
4063 i?86-*-* | \
4064 x86_64-*-*)
4065 AC_TRY_COMPILE(, [asm("rdseed %eax");],
4066 [ac_cv_x86_rdseed=yes], [ac_cv_x86_rdseed=no])
4067 esac
4068 ])
4069 if test $ac_cv_x86_rdseed = yes; then
4070 AC_DEFINE(_GLIBCXX_X86_RDSEED, 1,
4071 [ Defined if as can handle rdseed. ])
4072 fi
4073 AC_MSG_RESULT($ac_cv_x86_rdseed)
4074])
4075
f4d90d64 4076dnl
4077dnl Check whether get_nprocs is available in <sys/sysinfo.h>, and define _GLIBCXX_USE_GET_NPROCS.
4078dnl
4079AC_DEFUN([GLIBCXX_CHECK_GET_NPROCS], [
4080
4081 AC_LANG_SAVE
4082 AC_LANG_CPLUSPLUS
4083 ac_save_CXXFLAGS="$CXXFLAGS"
4084 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4085
4086 AC_MSG_CHECKING([for get_nprocs])
4087 AC_CACHE_VAL(glibcxx_cv_GET_NPROCS, [
4088 GCC_TRY_COMPILE_OR_LINK(
4089 [#include <sys/sysinfo.h>],
4090 [int n = get_nprocs();],
4091 [glibcxx_cv_GET_NPROCS=yes],
4092 [glibcxx_cv_GET_NPROCS=no])
4093 ])
4094 if test $glibcxx_cv_GET_NPROCS = yes; then
4095 AC_DEFINE(_GLIBCXX_USE_GET_NPROCS, 1, [Define if get_nprocs is available in <sys/sysinfo.h>.])
4096 fi
4097 AC_MSG_RESULT($glibcxx_cv_GET_NPROCS)
4098
4099 CXXFLAGS="$ac_save_CXXFLAGS"
4100 AC_LANG_RESTORE
4101])
4102
4103dnl
4104dnl Check whether sysconf(_SC_NPROCESSORS_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROCESSORS_ONLN.
4105dnl
4106AC_DEFUN([GLIBCXX_CHECK_SC_NPROCESSORS_ONLN], [
4107
4108 AC_LANG_SAVE
4109 AC_LANG_CPLUSPLUS
4110 ac_save_CXXFLAGS="$CXXFLAGS"
4111 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4112
4113 AC_MSG_CHECKING([for _SC_NPROCESSORS_ONLN])
4114 AC_CACHE_VAL(glibcxx_cv_SC_NPROCESSORS_ONLN, [
4115 GCC_TRY_COMPILE_OR_LINK(
4116 [#include <unistd.h>],
4117 [int n = sysconf(_SC_NPROCESSORS_ONLN);],
4118 [glibcxx_cv_SC_NPROCESSORS_ONLN=yes],
4119 [glibcxx_cv_SC_NPROCESSORS_ONLN=no])
4120 ])
4121 if test $glibcxx_cv_SC_NPROCESSORS_ONLN = yes; then
4122 AC_DEFINE(_GLIBCXX_USE_SC_NPROCESSORS_ONLN, 1, [Define if _SC_NPROCESSORS_ONLN is available in <unistd.h>.])
4123 fi
4124 AC_MSG_RESULT($glibcxx_cv_SC_NPROCESSORS_ONLN)
4125
4126 CXXFLAGS="$ac_save_CXXFLAGS"
4127 AC_LANG_RESTORE
4128])
4129
da22c41a 4130dnl
4131dnl Check whether sysconf(_SC_NPROC_ONLN) is available in <unistd.h>, and define _GLIBCXX_USE_SC_NPROC_ONLN.
4132dnl
4133AC_DEFUN([GLIBCXX_CHECK_SC_NPROC_ONLN], [
4134
4135 AC_LANG_SAVE
4136 AC_LANG_CPLUSPLUS
4137 ac_save_CXXFLAGS="$CXXFLAGS"
4138 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4139
4140 AC_MSG_CHECKING([for _SC_NPROC_ONLN])
4141 AC_CACHE_VAL(glibcxx_cv_SC_NPROC_ONLN, [
4142 GCC_TRY_COMPILE_OR_LINK(
4143 [#include <unistd.h>],
4144 [int n = sysconf(_SC_NPROC_ONLN);],
4145 [glibcxx_cv_SC_NPROC_ONLN=yes],
4146 [glibcxx_cv_SC_NPROC_ONLN=no])
4147 ])
4148 if test $glibcxx_cv_SC_NPROC_ONLN = yes; then
4149 AC_DEFINE(_GLIBCXX_USE_SC_NPROC_ONLN, 1, [Define if _SC_NPROC_ONLN is available in <unistd.h>.])
4150 fi
4151 AC_MSG_RESULT($glibcxx_cv_SC_NPROC_ONLN)
4152
4153 CXXFLAGS="$ac_save_CXXFLAGS"
4154 AC_LANG_RESTORE
4155])
4156
4157dnl
4158dnl Check whether pthread_num_processors_np is available in <pthread.h>, and define _GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP.
4159dnl
4160AC_DEFUN([GLIBCXX_CHECK_PTHREADS_NUM_PROCESSORS_NP], [
4161
4162 AC_LANG_SAVE
4163 AC_LANG_CPLUSPLUS
4164 ac_save_CXXFLAGS="$CXXFLAGS"
4165 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4166
4167 AC_MSG_CHECKING([for pthreads_num_processors_np])
4168 AC_CACHE_VAL(glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP, [
4169 GCC_TRY_COMPILE_OR_LINK(
4170 [#include <pthread.h>],
4171 [int n = pthread_num_processors_np();],
4172 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=yes],
4173 [glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP=no])
4174 ])
4175 if test $glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP = yes; then
4176 AC_DEFINE(_GLIBCXX_USE_PTHREADS_NUM_PROCESSORS_NP, 1, [Define if pthreads_num_processors_np is available in <pthread.h>.])
4177 fi
4178 AC_MSG_RESULT($glibcxx_cv_PTHREADS_NUM_PROCESSORS_NP)
4179
4180 CXXFLAGS="$ac_save_CXXFLAGS"
4181 AC_LANG_RESTORE
4182])
4183
4184dnl
4185dnl Check whether sysctl is available in <pthread.h>, and define _GLIBCXX_USE_SYSCTL_HW_NCPU.
4186dnl
4187AC_DEFUN([GLIBCXX_CHECK_SYSCTL_HW_NCPU], [
4188
4189 AC_LANG_SAVE
4190 AC_LANG_CPLUSPLUS
4191 ac_save_CXXFLAGS="$CXXFLAGS"
4192 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4193
4194 AC_MSG_CHECKING([for hw.ncpu sysctl])
4195 AC_CACHE_VAL(glibcxx_cv_SYSCTL_HW_NCPU, [
4196 GCC_TRY_COMPILE_OR_LINK(
4197 [
4198 #include <stddef.h>
4199 #include <sys/sysctl.h>
4200 ],
4201 [
4202 int count;
4203 size_t size = sizeof(count);
4204 int mib[] = { CTL_HW, HW_NCPU };
4205 sysctl(mib, 2, &count, &size, NULL, 0);
4206 ],
4207 [glibcxx_cv_SYSCTL_HW_NCPU=yes],
4208 [glibcxx_cv_SYSCTL_HW_NCPU=no])
4209 ])
4210 if test $glibcxx_cv_SYSCTL_HW_NCPU = yes; then
4211 AC_DEFINE(_GLIBCXX_USE_SYSCTL_HW_NCPU, 1, [Define if sysctl(), CTL_HW and HW_NCPU are available in <sys/sysctl.h>.])
4212 fi
4213 AC_MSG_RESULT($glibcxx_cv_SYSCTL_HW_NCPU)
4214
4215 CXXFLAGS="$ac_save_CXXFLAGS"
4216 AC_LANG_RESTORE
4217])
f4d90d64 4218
0559575c 4219dnl
4220dnl Check to see if python pretty printing can be activated.
4221dnl
4222dnl --with-python-dir=dir
4223dnl installs directory into $prefix/dir
4224AC_DEFUN([GLIBCXX_ENABLE_PYTHON], [
4225
4226AC_MSG_CHECKING([for custom python install directory])
4227AC_ARG_WITH([python-dir],
4228 AS_HELP_STRING([--with-python-dir],
4229 [the location to install Python modules. This path is relative starting from the prefix.]),
4230 [with_python_dir=$withval], [with_python_dir="no"])
4231AC_MSG_RESULT(${with_python_dir})
4232
4233# Needed for installing Python modules during make install.
4234python_mod_dir="${with_python_dir}"
4235AC_SUBST(python_mod_dir)
4236GLIBCXX_CONDITIONAL(ENABLE_PYTHONDIR, test $python_mod_dir != no)
4237])
4238
413e9930 4239dnl
4240dnl Check to see if -Werror is disabled.
4241dnl
4242dnl --enable-werror/--disable-werror
4243AC_DEFUN([GLIBCXX_ENABLE_WERROR], [
4244 AC_MSG_CHECKING([for -Werror])
4245 GLIBCXX_ENABLE(werror,$1,,[turns on -Werror])
4246 AC_MSG_RESULT($enable_werror)
4247 GLIBCXX_CONDITIONAL(ENABLE_WERROR, test $enable_werror = yes)
4248])
4249
e1150b06 4250dnl
4251dnl Check whether obsolescent tmpnam is available in <stdio.h>,
4252dnl and define _GLIBCXX_USE_TMPNAM.
4253dnl
4254AC_DEFUN([GLIBCXX_CHECK_TMPNAM], [dnl
4255dnl
4256 AC_LANG_SAVE
4257 AC_LANG_CPLUSPLUS
4258 ac_save_CXXFLAGS="$CXXFLAGS"
4259 CXXFLAGS="$CXXFLAGS -fno-exceptions"
4260dnl
4261 AC_MSG_CHECKING([for tmpnam])
4262 AC_CACHE_VAL(glibcxx_cv_TMPNAM, [dnl
4263 GCC_TRY_COMPILE_OR_LINK(
4264 [#include <stdio.h>],
4265 [char *tmp = tmpnam(NULL);],
4266 [glibcxx_cv_TMPNAM=yes],
4267 [glibcxx_cv_TMPNAM=no])
4268 ])
4269 if test $glibcxx_cv_TMPNAM = yes; then
4270 AC_DEFINE(_GLIBCXX_USE_TMPNAM, 1, [Define if obsolescent tmpnam is available in <stdio.h>.])
4271 fi
4272 AC_MSG_RESULT($glibcxx_cv_TMPNAM)
4273dnl
4274 CXXFLAGS="$ac_save_CXXFLAGS"
4275 AC_LANG_RESTORE
4276])
0559575c 4277
2724b74a 4278dnl
4279dnl Check to see if sys/sdt.h exists and that it is suitable for use.
4280dnl Some versions of sdt.h were not compatible with C++11.
4281dnl
4282AC_DEFUN([GLIBCXX_CHECK_SDT_H], [
cad5a9dc 4283 AC_MSG_CHECKING([for suitable sys/sdt.h])
2724b74a 4284 # Note that this test has to be run with the C language.
4285 # Otherwise, sdt.h will try to include some headers from
4286 # libstdc++ itself.
4287 AC_LANG_SAVE
4288 AC_LANG_C
4289 AC_CACHE_VAL(glibcxx_cv_sys_sdt_h, [
4290 # Because we have to run the test in C, we use grep rather
4291 # than the compiler to check for the bug. The bug is that
4292 # were strings without trailing whitespace, causing g++
4293 # to look for operator"". The pattern searches for the fixed
4294 # output.
4295 AC_EGREP_CPP([ \",\" ], [
4296 #include <sys/sdt.h>
4297 int f() { STAP_PROBE(hi, bob); }
4298 ], [glibcxx_cv_sys_sdt_h=yes], [glibcxx_cv_sys_sdt_h=no])
4299 ])
4300 AC_LANG_RESTORE
4301 if test $glibcxx_cv_sys_sdt_h = yes; then
4302 AC_DEFINE(HAVE_SYS_SDT_H, 1,
4303 [Define to 1 if you have a suitable <sys/sdt.h> header file])
4304 fi
4305 AC_MSG_RESULT($glibcxx_cv_sys_sdt_h)
4306])
4307
60f5701c 4308dnl
63f54259 4309dnl Control whether the library should define symbols for old and new ABIs.
4310dnl This affects definitions of strings, stringstreams and locale facets.
60f5701c 4311dnl
63f54259 4312dnl --disable-libstdcxx-dual-abi will use old ABI for all types.
60f5701c 4313dnl
4314dnl Defines:
63f54259 4315dnl _GLIBCXX_USE_DUAL_ABI (always defined, either to 1 or 0)
60f5701c 4316dnl
63f54259 4317AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_DUAL_ABI], [
4318 GLIBCXX_ENABLE(libstdcxx-dual-abi,$1,,[support two versions of std::string])
30915773 4319 if test x$enable_symvers = xgnu-versioned-namespace; then
4320 # gnu-versioned-namespace is incompatible with the dual ABI.
4321 enable_libstdcxx_dual_abi="no"
4322 fi
63f54259 4323 if test x"$enable_libstdcxx_dual_abi" != xyes; then
4324 AC_MSG_NOTICE([dual ABI is disabled])
d9f6f79e 4325 default_libstdcxx_abi="gcc4-compatible"
60f5701c 4326 fi
63f54259 4327 GLIBCXX_CONDITIONAL(ENABLE_DUAL_ABI, test $enable_libstdcxx_dual_abi = yes)
60f5701c 4328])
4329
63f54259 4330dnl
4331dnl Check to see which ABI should be enabled by default.
4332dnl
d9f6f79e 4333dnl --with-default-libstdcxx-abi={gcc4-compatible,new}
63f54259 4334dnl
4335dnl Defines:
4336dnl _GLIBCXX_USE_CXX11_ABI (always defined, either to 1 or 0)
4337dnl
4338AC_DEFUN([GLIBCXX_DEFAULT_ABI], [
4339 if test x$enable_libstdcxx_dual_abi = xyes; then
4340 AC_MSG_CHECKING([for default std::string ABI to use])
4341 AC_ARG_WITH([default-libstdcxx-abi],
4342 AS_HELP_STRING([--with-default-libstdcxx-abi],
4343 [set the std::string ABI to use by default]),
4344 [case "$withval" in
d9f6f79e 4345 gcc4-compatible) default_libstdcxx_abi="gcc4-compatible" ;;
4346 new|cxx11) default_libstdcxx_abi="new" ;;
4347 c++*|gnu++*) AC_MSG_ERROR([Supported arguments for --with-default-libstdcxx-abi have changed, use "new" or "gcc4-compatible"]) ;;
4348 *) AC_MSG_ERROR([Invalid argument for --with-default-libstdcxx-abi]) ;;
4349 esac
4350 ],
4351 [default_libstdcxx_abi="new"])
63f54259 4352 AC_MSG_RESULT(${default_libstdcxx_abi})
4353 fi
d9f6f79e 4354 if test $default_libstdcxx_abi = "new"; then
63f54259 4355 glibcxx_cxx11_abi=1
4356 glibcxx_cxx98_abi=0
4357 else
4358 glibcxx_cxx11_abi=0
4359 glibcxx_cxx98_abi=1
4360 fi
4361 AC_SUBST(glibcxx_cxx98_abi)
4362 GLIBCXX_CONDITIONAL(ENABLE_CXX11_ABI, test $glibcxx_cxx11_abi = 1)
4363])
4364
5924b28e 4365dnl
4366dnl Check to see whether to build libstdc++fs.a
4367dnl
4368dnl --enable-libstdcxx-filesystem-ts
4369dnl
4370AC_DEFUN([GLIBCXX_ENABLE_FILESYSTEM_TS], [
4371 GLIBCXX_ENABLE(libstdcxx-filesystem-ts,auto,,
4372 [turns on ISO/IEC TS 18822 support],
4373 [permit yes|no|auto])
4374
4375 AC_MSG_CHECKING([whether to build Filesystem TS support])
e16e2d2c 4376 if test x"$ac_cv_header_dirent_h" != x"yes"; then
4377 enable_libstdcxx_filesystem_ts=no
4378 fi
5924b28e 4379 if test x"$enable_libstdcxx_filesystem_ts" = x"auto"; then
4380 case "${target_os}" in
4381 freebsd*|netbsd*|openbsd*|dragonfly*|darwin*)
4382 enable_libstdcxx_filesystem_ts=yes
4383 ;;
4384 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
4385 enable_libstdcxx_filesystem_ts=yes
4386 ;;
9de62d25 4387 rtems*)
4388 enable_libstdcxx_filesystem_ts=yes
4389 ;;
5924b28e 4390 solaris*)
de11012f 4391 enable_libstdcxx_filesystem_ts=yes
5924b28e 4392 ;;
4393 *)
4394 enable_libstdcxx_filesystem_ts=no
4395 ;;
4396 esac
4397 fi
4398 AC_MSG_RESULT($enable_libstdcxx_filesystem_ts)
4399 GLIBCXX_CONDITIONAL(ENABLE_FILESYSTEM_TS, test $enable_libstdcxx_filesystem_ts = yes)
4400])
4401
4402dnl
84f1425e 4403dnl Check whether the library calls required by the Filesystem TS are present.
4404dnl Defines:
4405dnl HAVE_STRUCT_DIRENT_D_TYPE
4406dnl _GLIBCXX_USE_REALPATH
4407dnl _GLIBCXX_USE_UTIMENSAT
4408dnl _GLIBCXX_USE_ST_MTIM
4409dnl _GLIBCXX_USE_FCHMOD
4410dnl _GLIBCXX_USE_FCHMODAT
4411dnl _GLIBCXX_USE_SENDFILE
4412dnl HAVE_LINK
4413dnl HAVE_READLINK
4414dnl HAVE_SYMLINK
5924b28e 4415dnl
4416AC_DEFUN([GLIBCXX_CHECK_FILESYSTEM_DEPS], [dnl
4417dnl
84f1425e 4418 if test $enable_libstdcxx_filesystem_ts = yes; then
4419 AC_LANG_SAVE
4420 AC_LANG_CPLUSPLUS
4421 ac_save_CXXFLAGS="$CXXFLAGS"
4422 CXXFLAGS="$CXXFLAGS -fno-exceptions"
698d31e1 4423dnl
84f1425e 4424 AC_MSG_CHECKING([for struct dirent.d_type])
4425 AC_CACHE_VAL(glibcxx_cv_dirent_d_type, [dnl
4426 GCC_TRY_COMPILE_OR_LINK(
4427 [#include <dirent.h>],
4428 [
4429 struct dirent d;
4430 if (sizeof d.d_type) return 0;
4431 ],
4432 [glibcxx_cv_dirent_d_type=yes],
4433 [glibcxx_cv_dirent_d_type=no])
4434 ])
4435 if test $glibcxx_cv_dirent_d_type = yes; then
4436 AC_DEFINE(HAVE_STRUCT_DIRENT_D_TYPE, 1, [Define to 1 if `d_type' is a member of `struct dirent'.])
4437 fi
4438 AC_MSG_RESULT($glibcxx_cv_dirent_d_type)
5924b28e 4439dnl
84f1425e 4440 AC_MSG_CHECKING([for realpath])
4441 AC_CACHE_VAL(glibcxx_cv_realpath, [dnl
4442 GCC_TRY_COMPILE_OR_LINK(
4443 [
4444 #include <limits.h>
4445 #include <stdlib.h>
4446 #include <unistd.h>
4447 ],
4448 [
4449 #if _XOPEN_VERSION < 500
4450 #error
4451 #elif _XOPEN_VERSION >= 700 || defined(PATH_MAX)
4452 char *tmp = realpath((const char*)NULL, (char*)NULL);
4453 #else
4454 #error
4455 #endif
4456 ],
4457 [glibcxx_cv_realpath=yes],
4458 [glibcxx_cv_realpath=no])
4459 ])
4460 if test $glibcxx_cv_realpath = yes; then
4461 AC_DEFINE(_GLIBCXX_USE_REALPATH, 1, [Define if usable realpath is available in <stdlib.h>.])
4462 fi
4463 AC_MSG_RESULT($glibcxx_cv_realpath)
5924b28e 4464dnl
84f1425e 4465 AC_MSG_CHECKING([for utimensat])
4466 AC_CACHE_VAL(glibcxx_cv_utimensat, [dnl
4467 GCC_TRY_COMPILE_OR_LINK(
4468 [
4469 #include <fcntl.h>
4470 #include <sys/stat.h>
4471 ],
4472 [
4473 struct timespec ts[2] = { { 0, UTIME_OMIT }, { 1, 1 } };
4474 int i = utimensat(AT_FDCWD, "path", ts, 0);
4475 ],
4476 [glibcxx_cv_utimensat=yes],
4477 [glibcxx_cv_utimensat=no])
4478 ])
4479 if test $glibcxx_cv_utimensat = yes; then
4480 AC_DEFINE(_GLIBCXX_USE_UTIMENSAT, 1, [Define if utimensat and UTIME_OMIT are available in <sys/stat.h> and AT_FDCWD in <fcntl.h>.])
4481 fi
4482 AC_MSG_RESULT($glibcxx_cv_utimensat)
3935f409 4483dnl
4484 AC_MSG_CHECKING([for utime])
4485 AC_CACHE_VAL(glibcxx_cv_utime, [dnl
4486 GCC_TRY_COMPILE_OR_LINK(
4487 [
4488 #include <utime.h>
4489 ],
4490 [
4491 struct utimbuf t = { 1, 1 };
4492 int i = utime("path", &t);
4493 ],
4494 [glibcxx_cv_utime=yes],
4495 [glibcxx_cv_utime=no])
4496 ])
4497 if test $glibcxx_cv_utime = yes; then
4498 AC_DEFINE(_GLIBCXX_USE_UTIME, 1, [Define if utime is available in <utime.h>.])
4499 fi
4500 AC_MSG_RESULT($glibcxx_cv_utime)
4501dnl
4502 AC_MSG_CHECKING([for lstat])
4503 AC_CACHE_VAL(glibcxx_cv_lstat, [dnl
4504 GCC_TRY_COMPILE_OR_LINK(
4505 [ #include <sys/stat.h> ],
4506 [
4507 struct stat st;
4508 int i = lstat("path", &st);
4509 ],
4510 [glibcxx_cv_lstat=yes],
4511 [glibcxx_cv_lstat=no])
4512 ])
4513 if test $glibcxx_cv_lstat = yes; then
4514 AC_DEFINE(_GLIBCXX_USE_LSTAT, 1, [Define if lstat is available in <sys/stat.h>.])
4515 fi
4516 AC_MSG_RESULT($glibcxx_cv_lstat)
5924b28e 4517dnl
84f1425e 4518 AC_MSG_CHECKING([for struct stat.st_mtim.tv_nsec])
4519 AC_CACHE_VAL(glibcxx_cv_st_mtim, [dnl
4520 GCC_TRY_COMPILE_OR_LINK(
4521 [ #include <sys/stat.h> ],
4522 [
4523 struct stat st;
4524 return st.st_mtim.tv_nsec;
4525 ],
4526 [glibcxx_cv_st_mtim=yes],
4527 [glibcxx_cv_st_mtim=no])
4528 ])
4529 if test $glibcxx_cv_st_mtim = yes; then
4530 AC_DEFINE(_GLIBCXX_USE_ST_MTIM, 1, [Define if struct stat has timespec members.])
4531 fi
4532 AC_MSG_RESULT($glibcxx_cv_st_mtim)
21b54875 4533dnl
84f1425e 4534 AC_MSG_CHECKING([for fchmod])
4535 AC_CACHE_VAL(glibcxx_cv_fchmod, [dnl
4536 GCC_TRY_COMPILE_OR_LINK(
4537 [#include <sys/stat.h>],
4538 [fchmod(1, S_IWUSR);],
4539 [glibcxx_cv_fchmod=yes],
4540 [glibcxx_cv_fchmod=no])
4541 ])
4542 if test $glibcxx_cv_fchmod = yes; then
4543 AC_DEFINE(_GLIBCXX_USE_FCHMOD, 1, [Define if fchmod is available in <sys/stat.h>.])
4544 fi
4545 AC_MSG_RESULT($glibcxx_cv_fchmod)
e16e2d2c 4546dnl
84f1425e 4547 AC_MSG_CHECKING([for fchmodat])
4548 AC_CACHE_VAL(glibcxx_cv_fchmodat, [dnl
4549 GCC_TRY_COMPILE_OR_LINK(
4550 [
4551 #include <fcntl.h>
4552 #include <sys/stat.h>
4553 ],
4554 [fchmodat(AT_FDCWD, "", 0, AT_SYMLINK_NOFOLLOW);],
4555 [glibcxx_cv_fchmodat=yes],
4556 [glibcxx_cv_fchmodat=no])
4557 ])
4558 if test $glibcxx_cv_fchmodat = yes; then
4559 AC_DEFINE(_GLIBCXX_USE_FCHMODAT, 1, [Define if fchmodat is available in <sys/stat.h>.])
4560 fi
4561 AC_MSG_RESULT($glibcxx_cv_fchmodat)
4562dnl
4563 AC_MSG_CHECKING([for sendfile that can copy files])
4564 AC_CACHE_VAL(glibcxx_cv_sendfile, [dnl
4565 case "${target_os}" in
4566 gnu* | linux* | solaris*)
4567 GCC_TRY_COMPILE_OR_LINK(
4568 [#include <sys/sendfile.h>],
4569 [sendfile(1, 2, (off_t*)0, sizeof 1);],
4570 [glibcxx_cv_sendfile=yes],
4571 [glibcxx_cv_sendfile=no])
4572 ;;
4573 *)
4574 glibcxx_cv_sendfile=no
4575 ;;
4576 esac
4577 ])
4578 if test $glibcxx_cv_sendfile = yes; then
4579 AC_DEFINE(_GLIBCXX_USE_SENDFILE, 1, [Define if sendfile is available in <sys/sendfile.h>.])
4580 fi
4581 AC_MSG_RESULT($glibcxx_cv_sendfile)
21b54875 4582dnl
84f1425e 4583 AC_MSG_CHECKING([for link])
4584 AC_CACHE_VAL(glibcxx_cv_link, [dnl
4585 GCC_TRY_COMPILE_OR_LINK(
4586 [#include <unistd.h>],
4587 [link("", "");],
4588 [glibcxx_cv_link=yes],
4589 [glibcxx_cv_link=no])
4590 ])
4591 if test $glibcxx_cv_link = yes; then
4592 AC_DEFINE(HAVE_LINK, 1, [Define if link is available in <unistd.h>.])
4593 fi
4594 AC_MSG_RESULT($glibcxx_cv_link)
5924b28e 4595dnl
84f1425e 4596 AC_MSG_CHECKING([for readlink])
4597 AC_CACHE_VAL(glibcxx_cv_readlink, [dnl
4598 GCC_TRY_COMPILE_OR_LINK(
4599 [#include <unistd.h>],
4600 [char buf[32]; readlink("", buf, sizeof(buf));],
4601 [glibcxx_cv_readlink=yes],
4602 [glibcxx_cv_readlink=no])
4603 ])
4604 if test $glibcxx_cv_readlink = yes; then
4605 AC_DEFINE(HAVE_READLINK, 1, [Define if readlink is available in <unistd.h>.])
4606 fi
4607 AC_MSG_RESULT($glibcxx_cv_readlink)
4608dnl
4609 AC_MSG_CHECKING([for symlink])
4610 AC_CACHE_VAL(glibcxx_cv_symlink, [dnl
4611 GCC_TRY_COMPILE_OR_LINK(
4612 [#include <unistd.h>],
4613 [symlink("", "");],
4614 [glibcxx_cv_symlink=yes],
4615 [glibcxx_cv_symlink=no])
4616 ])
4617 if test $glibcxx_cv_symlink = yes; then
4618 AC_DEFINE(HAVE_SYMLINK, 1, [Define if symlink is available in <unistd.h>.])
4619 fi
4620 AC_MSG_RESULT($glibcxx_cv_symlink)
3f304b2d 4621dnl
4622 AC_MSG_CHECKING([for truncate])
4623 AC_CACHE_VAL(glibcxx_cv_truncate, [dnl
4624 GCC_TRY_COMPILE_OR_LINK(
4625 [#include <unistd.h>],
4626 [truncate("", 99);],
4627 [glibcxx_cv_truncate=yes],
4628 [glibcxx_cv_truncate=no])
4629 ])
4630 if test $glibcxx_cv_truncate = yes; then
4631 AC_DEFINE(HAVE_TRUNCATE, 1, [Define if truncate is available in <unistd.h>.])
4632 fi
4633 AC_MSG_RESULT($glibcxx_cv_truncate)
84f1425e 4634dnl
4635 CXXFLAGS="$ac_save_CXXFLAGS"
4636 AC_LANG_RESTORE
4637 fi
5924b28e 4638])
63f54259 4639
13143e13 4640dnl
4641dnl Check how size_t is mangled. Copied from libitm.
4642dnl
4643AC_DEFUN([GLIBCXX_CHECK_SIZE_T_MANGLING], [
4644 AC_CACHE_CHECK([how size_t is mangled],
4645 glibcxx_cv_size_t_mangling, [
4646 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned long x;],
4647 [glibcxx_cv_size_t_mangling=m], [
4648 AC_TRY_COMPILE([], [extern __SIZE_TYPE__ x; extern unsigned int x;],
4649 [glibcxx_cv_size_t_mangling=j], [
4650 AC_TRY_COMPILE([],
4651 [extern __SIZE_TYPE__ x; extern unsigned long long x;],
4652 [glibcxx_cv_size_t_mangling=y], [
4653 AC_TRY_COMPILE([],
4654 [extern __SIZE_TYPE__ x; extern unsigned short x;],
10ce8d10 4655 [glibcxx_cv_size_t_mangling=t], [
4656 AC_TRY_COMPILE([],
4657 [extern __SIZE_TYPE__ x; extern __int20 unsigned x;],
4658 [glibcxx_cv_size_t_mangling=u6uint20],
4659 [glibcxx_cv_size_t_mangling=x])
4660 ])
13143e13 4661 ])
4662 ])
4663 ])
4664 ])
4665 if test $glibcxx_cv_size_t_mangling = x; then
4666 AC_MSG_ERROR([Unknown underlying type for size_t])
4667 fi
4668 AC_DEFINE_UNQUOTED(_GLIBCXX_MANGLE_SIZE_T, [$glibcxx_cv_size_t_mangling],
4669 [Define to the letter to which size_t is mangled.])
4670])
4671
c45be7f1 4672dnl
4673dnl Determine whether std::exception_ptr symbols should be exported with
4674dnl the symbol versions from GCC 4.6.0 or GCC 7.1.0, depending on which
4675dnl release first added support for std::exception_ptr. Originally it was
4676dnl only supported for targets with always-lock-free atomics for int, but
4677dnl since GCC 7.1 it is supported for all targets.
4678dnl
4679AC_DEFUN([GLIBCXX_CHECK_EXCEPTION_PTR_SYMVER], [
4680 if test $enable_symvers != no; then
4681 AC_MSG_CHECKING([for first version to support std::exception_ptr])
4682 case ${target} in
4683 aarch64-*-* | alpha-*-* | hppa*-*-* | i?86-*-* | x86_64-*-* | \
4684 m68k-*-* | powerpc*-*-* | s390*-*-* | *-*-solaris* )
4685 ac_exception_ptr_since_gcc46=yes
4686 ;;
4687 *)
4688 # If the value of this macro changes then we will need to hardcode
4689 # yes/no here for additional targets based on the original value.
4690 AC_TRY_COMPILE([], [
4691 #if __GCC_ATOMIC_INT_LOCK_FREE <= 1
4692 # error atomic int not always lock free
4693 #endif
4694 ],
4695 [ac_exception_ptr_since_gcc46=yes],
4696 [ac_exception_ptr_since_gcc46=no])
4697 ;;
4698 esac
4699 if test x"$ac_exception_ptr_since_gcc46" = x"yes" ; then
4700 AC_DEFINE(HAVE_EXCEPTION_PTR_SINCE_GCC46, 1,
4701 [Define to 1 if GCC 4.6 supported std::exception_ptr for the target])
4702 AC_MSG_RESULT([4.6.0])
4703 else
4704 AC_MSG_RESULT([7.1.0])
4705 fi
4706 fi
4707])
4708
6b2678bb 4709# Macros from the top-level gcc directory.
55f10c87 4710m4_include([../config/gc++filt.m4])
6b2678bb 4711m4_include([../config/tls.m4])
017f22df 4712m4_include([../config/gthr.m4])
7bde822d 4713m4_include([../config/cet.m4])
Mirror of https://gcc.gnu.org/git/gcc.git