esac
fi
-CPPFLAGS="$CPPFLAGS -DG_DISABLE_SINGLE_INCLUDES"
-
if test "$glib_native_win32" = "yes"; then
if test x$enable_static = xyes -a x$enable_shared = xyes; then
AC_MSG_ERROR([Can not build both shared and static at the same time on Windows.])
AC_CHECK_HEADERS([mntent.h sys/mnttab.h sys/vfstab.h sys/mntctl.h sys/sysctl.h fstab.h])
AC_CHECK_HEADERS([sys/uio.h sys/mkdev.h])
AC_CHECK_HEADERS([linux/magic.h])
+AC_CHECK_HEADERS([sys/prctl.h])
# check for structure fields
AC_CHECK_MEMBERS([struct stat.st_mtimensec, struct stat.st_mtim.tv_nsec, struct stat.st_atimensec, struct stat.st_atim.tv_nsec, struct stat.st_ctimensec, struct stat.st_ctim.tv_nsec])
AC_CHECK_FUNCS(getmntent_r setmntent endmntent hasmntopt getfsstat getvfsstat)
# Check for high-resolution sleep functions
AC_CHECK_FUNCS(splice)
+AC_CHECK_FUNCS(prlimit)
# To avoid finding a compatibility unusable statfs, which typically
# successfully compiles, but warns to use the newer statvfs interface:
fi
fi
-# Check for sys_errlist
-AC_MSG_CHECKING(for sys_errlist)
-AC_TRY_LINK(, [
-extern char *sys_errlist[];
-extern int sys_nerr;
-sys_errlist[sys_nerr-1][0] = 0;
-], glib_ok=yes, glib_ok=no)
-AC_MSG_RESULT($glib_ok)
-if test "$glib_ok" = "no"; then
- AC_DEFINE(NO_SYS_ERRLIST,1,[global 'sys_errlist' not found])
-fi
-
-# Check for sys_siglist
-AC_MSG_CHECKING(for sys_siglist)
-AC_TRY_LINK(, [
-extern char *sys_siglist[];
-exit (sys_siglist[0]);
-], glib_ok=yes, glib_ok=no)
-AC_MSG_RESULT($glib_ok)
-if test "$glib_ok" = "no"; then
- AC_DEFINE(NO_SYS_SIGLIST,1,[global 'sys_siglist' not found])
-fi
-
-# Check for sys_siglist decl (see Tue Jan 19 00:44:24 1999 in changelog)
-AC_MSG_CHECKING(for sys_siglist declaration)
-AC_TRY_COMPILE([#include <signal.h>], [
-strlen (sys_siglist[0]);
-], glib_ok=yes, glib_ok=no)
-AC_MSG_RESULT($glib_ok)
-if test "$glib_ok" = "no"; then
- AC_DEFINE(NO_SYS_SIGLIST_DECL,1,[global 'sys_siglist' not declared])
-fi
-
# Check if <sys/select.h> needs to be included for fd_set
AC_MSG_CHECKING([for fd_set])
AC_TRY_COMPILE([#include <sys/types.h>],
])
AC_SUBST(GLIB_RT_LIBS)
-AC_CACHE_CHECK(for monotonic clocks,
- glib_cv_monotonic_clock,AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
-#include <time.h>
-#include <unistd.h>
-int main() {
-#if !(defined(_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 && defined(CLOCK_MONOTONIC))
- #error No monotonic clock
-#endif
- return 0;
-}
-]])],glib_cv_monotonic_clock=yes,glib_cv_monotonic_clock=no))
-if test "$glib_cv_monotonic_clock" = "yes"; then
- AC_DEFINE(HAVE_MONOTONIC_CLOCK,1,[Have a monotonic clock])
-fi
-
dnl ************************
dnl *** g_atomic_* tests ***
dnl ************************
- case $host_cpu in
- i?86|x86_64|s390|s390x|arm*|crisv32*|etrax*)
- glib_memory_barrier_needed=no
- ;;
- sparc*|alpha*|powerpc*|ia64)
- glib_memory_barrier_needed=yes
- ;;
- *)
- glib_memory_barrier_needed=yes
- ;;
- esac
-
-glib_cv_gcc_has_builtin_atomic_operations=no
-if test x"$GCC" = xyes; then
- AC_MSG_CHECKING([whether GCC supports built-in atomic intrinsics])
- AC_TRY_LINK([],
- [int i;
- __sync_synchronize ();
- __sync_bool_compare_and_swap (&i, 0, 1);
- __sync_fetch_and_add (&i, 1);
- ],
- [glib_cv_gcc_has_builtin_atomic_operations=yes],
- [glib_cv_gcc_has_builtin_atomic_operations=no])
-
- AC_MSG_RESULT($glib_cv_gcc_has_builtin_atomic_operations)
-fi
-AM_CONDITIONAL(HAVE_GCC_BUILTINS_FOR_ATOMIC_OPERATIONS,
- [test $glib_cv_gcc_has_builtin_atomic_operations = yes])
-
-AC_MSG_CHECKING([for Win32 atomic intrinsics])
-glib_cv_has_win32_atomic_operations=no
-AC_TRY_LINK([],
- [int i; _InterlockedExchangeAdd (&i, 0);],
- [glib_cv_has_win32_atomic_operations=yes],
- [glib_cv_has_win32_atomic_operations=no])
-AC_MSG_RESULT($glib_cv_has_win32_atomic_operations)
-if test "x$glib_cv_has_win32_atomic_operations" = xyes; then
- AC_DEFINE(HAVE_WIN32_BUILTINS_FOR_ATOMIC_OPERATIONS,1,[Have Win32 atomic intrinsics])
-fi
+dnl We need to decide at configure time if GLib will use real atomic
+dnl operations ("lock free") or emulated ones with a mutex. This is
+dnl because we must put this information in glibconfig.h so we know if
+dnl it is safe or not to inline using compiler intrinsics directly from
+dnl the header.
+dnl
+dnl We also publish the information via G_ATOMIC_LOCK_FREE in case the
+dnl user is interested in knowing if they can use the atomic ops across
+dnl processes.
+dnl
+dnl We can currently support the atomic ops natively when building GLib
+dnl with recent versions of GCC or MSVC. MSVC doesn't run ./configure,
+dnl so we skip that case here and define G_ATOMIC_LOCK_FREE exactly when
+dnl we are using GCC.
+dnl
+dnl Note that the atomic ops are only available with GCC on x86 when
+dnl using -march=i486 or higher. If we detect that the atomic ops are
+dnl not available but would be available given the right flags, we want
+dnl to abort and advise the user to fix their CFLAGS. It's better to do
+dnl that then to silently fall back on emulated atomic ops just because
+dnl the user had the wrong build environment.
+
+dnl We may add other compilers here in the future...
+AC_MSG_CHECKING([for lock-free atomic intrinsics])
+AC_TRY_COMPILE([],
+ [__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4;],
+ [glib_cv_g_atomic_lock_free=yes],
+ [glib_cv_g_atomic_lock_free=no])
+AC_MSG_RESULT($glib_cv_g_atomic_lock_free)
+
+if test "$glib_cv_g_atomic_lock_free" = "no"; then
+ SAVE_CFLAGS="${CFLAGS}"
+ CFLAGS="-march=i486"
+ AC_TRY_COMPILE([],
+ [__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4;],
+ [AC_MSG_ERROR([GLib must be build with -march=i486 or later.])],
+ [])
+ CFLAGS="${SAVE_CFLAGS}"
+fi
+
+dnl We need a more robust approach here...
+case $host_cpu in
+ i?86|x86_64|s390|s390x|arm*|crisv32*|etrax*)
+ glib_memory_barrier_needed=no
+ ;;
+ sparc*|alpha*|powerpc*|ia64)
+ glib_memory_barrier_needed=yes
+ ;;
+ *)
+ glib_memory_barrier_needed=yes
+ ;;
+esac
dnl ************************
dnl ** Check for futex(2) **
#define G_THREADS_IMPL_$g_threads_impl_def
_______EOF
- cat >>$outfile <<_______EOF
-/* This represents a system thread as used by the implementation. An
- * alien implementaion, as loaded by g_thread_init can only count on
- * "sizeof (gpointer)" bytes to store their info. We however need more
- * for some of our native implementations. */
-typedef union _GSystemThread GSystemThread;
-union _GSystemThread
-{
- char data[[$g_system_thread_sizeof]];
- double dummy_double;
- void *dummy_pointer;
- long dummy_long;
-};
-_______EOF
if test x"$g_memory_barrier_needed" != xno; then
echo >>$outfile
echo "#define G_ATOMIC_OP_MEMORY_BARRIER_NEEDED 1" >>$outfile
fi
- if test x"$g_gcc_atomic_ops" != xno; then
+ if test x"$g_atomic_lock_free" = xyes; then
echo >>$outfile
- echo "#define G_ATOMIC_OP_USE_GCC_BUILTINS 1" >>$outfile
+ echo "#define G_ATOMIC_LOCK_FREE" >>$outfile
fi
echo >>$outfile
g_bit_sizes="16 32 64"
g_system_thread_sizeof="$glib_cv_sizeof_system_thread"
+g_atomic_lock_free="$glib_cv_g_atomic_lock_free"
g_memory_barrier_needed="$glib_memory_barrier_needed"
g_gcc_atomic_ops="$glib_cv_gcc_has_builtin_atomic_operations"
AC_CONFIG_FILES([
glib-2.0.pc
-glib-2.0-uninstalled.pc
gmodule-2.0.pc
gmodule-export-2.0.pc
gmodule-no-export-2.0.pc
-gmodule-2.0-uninstalled.pc
-gmodule-no-export-2.0-uninstalled.pc
gthread-2.0.pc
-gthread-2.0-uninstalled.pc
gobject-2.0.pc
-gobject-2.0-uninstalled.pc
gio-2.0.pc
gio-unix-2.0.pc
gio-windows-2.0.pc
-gio-2.0-uninstalled.pc
-gio-unix-2.0-uninstalled.pc
glib-zip
glib-gettextize
Makefile
gobject/glib-mkenums
gobject/tests/Makefile
gthread/Makefile
-gthread/tests/Makefile
gio/Makefile
gio/gdbus-2.0/codegen/Makefile
gio/gdbus-2.0/codegen/config.py
projects / platform / upstream / glib.git / blobdiff