# Keep these sync'd with the list in Makefile.am. The first provides an
# expandable list at autoconf time; the second provides an expandable list
# (i.e., shell variable) at configure time.
- m4_define([glibcxx_SUBDIRS],[include libmath libsupc++ src doc po testsuite])
+ m4_define([glibcxx_SUBDIRS],[include libsupc++ src doc po testsuite])
SUBDIRS='glibcxx_SUBDIRS'
# These need to be absolute paths, yet at the same time need to
# which are themselves conditionally expanded.
## (Right now, this only matters for enable_wchar_t, but nothing prevents
## other macros from doing the same. This should be automated.) -pme
- need_libmath=no
# Check for uClibc since Linux platforms use different configuration
# directories depending on the C library in use.
fi
# Export file names for ABI checking.
- baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}\$(MULTISUBDIR)"
+ baseline_dir="$glibcxx_srcdir/config/abi/post/${abi_baseline_pair}"
AC_SUBST(baseline_dir)
])
dnl
-dnl Check for clock_gettime clocks, used in the implementation of 20.8.5
-dnl [time.clock] in the current C++0x working draft.
+dnl Check for clock_gettime, nanosleep and sched_yield, used in the
+dnl implementation of 20.8.5 [time.clock], and 30.2.2 [thread.thread.this]
+dnl in the current C++0x working draft.
dnl
-dnl --enable-clock-gettime
-dnl --enable-clock-gettime=yes
-dnl checks for the availability of monotonic and realtime clocks
-dnl in libc and libposix4 and in case links the latter
-dnl --enable-clock-gettime=rt
+dnl --enable-libstdcxx-time
+dnl --enable-libstdcxx-time=yes
+dnl checks for the availability of monotonic and realtime clocks,
+dnl nanosleep and sched_yield in libc and libposix4 and, in case, links
+dnl the latter
+dnl --enable-libstdcxx-time=rt
dnl also searches (and, in case, links) librt. Note that this is
dnl not always desirable because, in glibc, for example, in turn it
dnl triggers the linking of libpthread too, which activates locking,
dnl a large overhead for single-thread programs.
-dnl --enable-clock-gettime=no
-dnl --disable-clock-gettime
+dnl --enable-libstdcxx-time=no
+dnl --disable-libstdcxx-time
dnl disables the checks completely
dnl
-AC_DEFUN([GLIBCXX_ENABLE_CLOCK_GETTIME], [
+AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME], [
- AC_MSG_CHECKING([for clock_gettime clocks])
- GLIBCXX_ENABLE(clock-gettime,$1,[=KIND],
+ AC_MSG_CHECKING([for clock_gettime, nanosleep and sched_yield])
+ GLIBCXX_ENABLE(libstdcxx-time,$1,[=KIND],
[use KIND for check type],
[permit yes|no|rt])
CXXFLAGS="$CXXFLAGS -fno-exceptions"
ac_save_LIBS="$LIBS"
- ac_has_clock_monotonic=no;
+ ac_has_clock_monotonic=no;
ac_has_clock_realtime=no;
- if test x"$enable_clock_gettime" != x"no"; then
+ if test x"$enable_libstdcxx_time" != x"no"; then
- if test x"$enable_clock_gettime" = x"rt"; then
+ if test x"$enable_libstdcxx_time" = x"rt"; then
AC_SEARCH_LIBS(clock_gettime, [rt posix4])
+ AC_SEARCH_LIBS(nanosleep, [rt posix4])
else
AC_SEARCH_LIBS(clock_gettime, [posix4])
+ AC_SEARCH_LIBS(nanosleep, [posix4])
fi
case "$ac_cv_search_clock_gettime" in
-l*) GLIBCXX_LIBS=$ac_cv_search_clock_gettime
+ ;;
+ esac
+ case "$ac_cv_search_nanosleep" in
+ -l*) GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_nanosleep"
+ ;;
+ esac
+
+ AC_SEARCH_LIBS(sched_yield, [rt posix4])
+
+ case "$ac_cv_search_sched_yield" in
+ -lposix4*)
+ GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
+ AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
+ [ Defined if sched_yield is available. ])
+ ;;
+ -lrt*)
+ if test x"$enable_libstdcxx_time" = x"rt"; then
+ GLIBCXX_LIBS="$GLIBCXX_LIBS $ac_cv_search_sched_yield"
+ AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
+ [ Defined if sched_yield is available. ])
+ fi
+ ;;
+ *)
+ AC_DEFINE(_GLIBCXX_USE_SCHED_YIELD, 1,
+ [ Defined if sched_yield is available. ])
+ ;;
esac
AC_CHECK_HEADERS(unistd.h, ac_has_unistd_h=yes, ac_has_unistd_h=no)
], [ac_has_clock_realtime=yes], [ac_has_clock_realtime=no])
AC_MSG_RESULT($ac_has_clock_realtime)
- fi
+ AC_MSG_CHECKING([for nanosleep])
+ AC_TRY_LINK(
+ [#include <unistd.h>
+ #include <time.h>
+ ],
+ [#if _POSIX_TIMERS > 0
+ timespec tp;
+ #endif
+ nanosleep(&tp, 0);
+ ], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])
+
+ AC_MSG_RESULT($ac_has_nanosleep)
+ fi
fi
if test x"$ac_has_clock_monotonic" = x"yes"; then
[ Defined if clock_gettime has realtime clock support. ])
fi
+ if test x"$ac_has_nanosleep" = x"yes"; then
+ AC_DEFINE(_GLIBCXX_USE_NANOSLEEP, 1,
+ [ Defined if nanosleep is available. ])
+ fi
+
AC_SUBST(GLIBCXX_LIBS)
CXXFLAGS="$ac_save_CXXFLAGS"
remainderf(0.0f, 0.0f);
remainderl(0.0l, 0.0l);
remquo(0.0, 0.0, 0);
- remquo(0.0f, 0.0f, 0);
- remquo(0.0l, 0.0l, 0);
+ remquof(0.0f, 0.0f, 0);
+ remquol(0.0l, 0.0l, 0);
rint(0.0);
rintf(0.0f);
rintl(0.0l);
])
dnl
-dnl Check whether C++200x's standard layout types are supported.
-dnl
-AC_DEFUN([GLIBCXX_CHECK_STANDARD_LAYOUT], [
-
- AC_MSG_CHECKING([for ISO C++200x standard layout type support])
- AC_CACHE_VAL(ac_standard_layout, [
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- ac_test_CXXFLAGS="${CXXFLAGS+set}"
- ac_save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS='-std=gnu++0x'
-
- AC_TRY_COMPILE([struct b
- {
- bool t;
-
- // Need standard layout relaxation from POD
- private:
- b& operator=(const b&);
- b(const b&);
- };
-
- int main()
- {
- b tst1 = { false };
- return 0;
- }],,
- [ac_standard_layout=yes], [ac_standard_layout=no])
-
- CXXFLAGS="$ac_save_CXXFLAGS"
- AC_LANG_RESTORE
- ])
- AC_MSG_RESULT($ac_standard_layout)
- if test x"$ac_standard_layout" = x"yes"; then
- AC_DEFINE(_GLIBCXX_USE_STANDARD_LAYOUT, 1,
- [Define if standard layout types are supported in C++200x.])
- fi
-])
-
-dnl
dnl Check for what type of C headers to use.
dnl
dnl --enable-cheaders= [does stuff].
dnl
dnl Defines:
dnl _GLIBCXX_ATOMIC_BUILTINS_1
+dnl _GLIBCXX_ATOMIC_BUILTINS_2
dnl _GLIBCXX_ATOMIC_BUILTINS_4
+dnl _GLIBCXX_ATOMIC_BUILTINS_8
dnl
AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [
AC_LANG_SAVE
[#]line __oline__ "configure"
int main()
{
+ typedef bool atomic_type;
+ atomic_type c1;
+ atomic_type c2;
+ const atomic_type c3(0);
+ __sync_fetch_and_add(&c1, c2);
+ __sync_val_compare_and_swap(&c1, c3, c2);
+ __sync_lock_test_and_set(&c1, c3);
+ __sync_lock_release(&c1);
+ __sync_synchronize();
+ return 0;
+}
+EOF
+
+ AC_MSG_CHECKING([for atomic builtins for bool])
+ if AC_TRY_EVAL(ac_compile); then
+ if grep __sync_ conftest.s >/dev/null 2>&1 ; then
+ enable_atomic_builtinsb=no
+ else
+ AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
+ [Define if builtin atomic operations for bool are supported on this host.])
+ enable_atomic_builtinsb=yes
+ fi
+ fi
+ AC_MSG_RESULT($enable_atomic_builtinsb)
+ rm -f conftest*
+
+ cat > conftest.$ac_ext << EOF
+[#]line __oline__ "configure"
+int main()
+{
+ typedef short atomic_type;
+ atomic_type c1;
+ atomic_type c2;
+ const atomic_type c3(0);
+ __sync_fetch_and_add(&c1, c2);
+ __sync_val_compare_and_swap(&c1, c3, c2);
+ __sync_lock_test_and_set(&c1, c3);
+ __sync_lock_release(&c1);
+ __sync_synchronize();
+ return 0;
+}
+EOF
+
+ AC_MSG_CHECKING([for atomic builtins for short])
+ if AC_TRY_EVAL(ac_compile); then
+ if grep __sync_ conftest.s >/dev/null 2>&1 ; then
+ enable_atomic_builtinss=no
+ else
+ AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1,
+ [Define if builtin atomic operations for short are supported on this host.])
+ enable_atomic_builtinss=yes
+ fi
+ fi
+ AC_MSG_RESULT($enable_atomic_builtinss)
+ rm -f conftest*
+
+ cat > conftest.$ac_ext << EOF
+[#]line __oline__ "configure"
+int main()
+{
// NB: _Atomic_word not necessarily int.
typedef int atomic_type;
atomic_type c1;
[#]line __oline__ "configure"
int main()
{
- typedef bool atomic_type;
+ typedef long long atomic_type;
atomic_type c1;
atomic_type c2;
const atomic_type c3(0);
}
EOF
- AC_MSG_CHECKING([for atomic builtins for bool])
+ AC_MSG_CHECKING([for atomic builtins for long long])
if AC_TRY_EVAL(ac_compile); then
if grep __sync_ conftest.s >/dev/null 2>&1 ; then
- enable_atomic_builtinsb=no
+ enable_atomic_builtinsll=no
else
- AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
- [Define if builtin atomic operations for bool are supported on this host.])
- enable_atomic_builtinsb=yes
+ AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1,
+ [Define if builtin atomic operations for long long are supported on this host.])
+ enable_atomic_builtinsll=yes
fi
fi
- AC_MSG_RESULT($enable_atomic_builtinsb)
+ AC_MSG_RESULT($enable_atomic_builtinsll)
rm -f conftest*
+
CXXFLAGS="$old_CXXFLAGS"
AC_LANG_RESTORE
if test $atomicity_dir = "cpu/generic" ; then
atomicity_dir=cpu/generic/atomicity_mutex
AC_MSG_WARN([No native atomic operations are provided for this platform.])
- if test $target_thread_file = single; then
+ if test "x$target_thread_file" = xsingle; then
AC_MSG_WARN([They cannot be faked when thread support is disabled.])
AC_MSG_WARN([Thread-safety of certain classes is not guaranteed.])
else
else
if test $with_gnu_ld = yes ; then
case ${target_os} in
- cygwin* | pe | mingw32*)
+ cygwin* | pe | mingw32* | hpux*)
enable_symvers=no ;;
*)
enable_symvers=gnu ;;
[Define to use symbol versioning in the shared library.])
fi
+AC_CACHE_CHECK([whether the target supports .symver directive],
+ glibcxx_cv_have_as_symver_directive, [
+ AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");],
+ [], glibcxx_cv_have_as_symver_directive=yes,
+ glibcxx_cv_have_as_symver_directive=no)])
+if test $glibcxx_cv_have_as_symver_directive = yes; then
+ AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1,
+ [Define to 1 if the target assembler supports .symver directive.])
+fi
+
AC_SUBST(SYMVER_FILE)
AC_SUBST(port_specific_symbol_files)
GLIBCXX_CONDITIONAL(ENABLE_SYMVERS, test $enable_symvers != no)
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