Properly check if .init_array can be used with .ctors on targets.

2011-06-18  H.J. Lu  <hongjiu.lu@intel.com>

	PR other/49325
	* acinclude.m4 (gcc_AC_INITFINI_ARRAY): Properly check if
	.init_array can be used with .ctors on targets.
	* configure: Regenerated.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@175181 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 105 insertions, 3 deletions

diff --git a/gcc/acinclude.m4 b/gcc/acinclude.m4
index 3eec559e8f5..ff386825880 100644
--- a/gcc/acinclude.m4
+++ b/gcc/acinclude.m4
@@ -375,13 +375,115 @@ AC_DEFUN([gcc_AC_INITFINI_ARRAY],
 	[], [
 AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
 		 gcc_cv_initfini_array, [dnl
-  AC_RUN_IFELSE([AC_LANG_SOURCE([
+  if test "x${build}" = "x${target}" && test "x${build}" = "x${host}"; then
+    AC_RUN_IFELSE([AC_LANG_SOURCE([
+#ifdef __ia64__
+/* We turn on .preinit_array/.init_array/.fini_array support for ia64
+   if it can be used.  */
 static int x = -1;
 int main (void) { return x; }
 int foo (void) { x = 0; }
-int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;])],
+int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
+#else
+extern void abort ();
+static int count;
+
+static void
+init1005 ()
+{
+  if (count != 0)
+    abort ();
+  count = 1005;
+}
+void (*const init_array1005[]) ()
+  __attribute__ ((section (".init_array.01005"), aligned (sizeof (void *))))
+  = { init1005 };
+static void
+fini1005 ()
+{
+  if (count != 1005)
+    abort ();
+}
+void (*const fini_array1005[]) ()
+  __attribute__ ((section (".fini_array.01005"), aligned (sizeof (void *))))
+  = { fini1005 };
+
+static void
+ctor1007 ()
+{
+  if (count != 1005)
+    abort ();
+  count = 1007;
+}
+void (*const ctors1007[]) ()
+  __attribute__ ((section (".ctors.64528"), aligned (sizeof (void *))))
+  = { ctor1007 };
+static void
+dtor1007 ()
+{
+  if (count != 1007)
+    abort ();
+  count = 1005;
+}
+void (*const dtors1007[]) ()
+  __attribute__ ((section (".dtors.64528"), aligned (sizeof (void *))))
+  = { dtor1007 };
+
+static void
+init65530 ()
+{
+  if (count != 1007)
+    abort ();
+  count = 65530;
+}
+void (*const init_array65530[]) ()
+  __attribute__ ((section (".init_array.65530"), aligned (sizeof (void *))))
+  = { init65530 };
+static void
+fini65530 ()
+{
+  if (count != 65530)
+    abort ();
+  count = 1007;
+}
+void (*const fini_array65530[]) ()
+  __attribute__ ((section (".fini_array.65530"), aligned (sizeof (void *))))
+  = { fini65530 };
+
+static void
+ctor65535 ()
+{
+  if (count != 65530)
+    abort ();
+  count = 65535;
+}
+void (*const ctors65535[]) ()
+  __attribute__ ((section (".ctors"), aligned (sizeof (void *))))
+  = { ctor65535 };
+static void
+dtor65535 ()
+{
+  if (count != 65535)
+    abort ();
+  count = 65530;
+}
+void (*const dtors65535[]) ()
+  __attribute__ ((section (".dtors"), aligned (sizeof (void *))))
+  = { dtor65535 };
+
+int
+main ()
+{
+  return 0;
+}
+#endif
+])],
 	     [gcc_cv_initfini_array=yes], [gcc_cv_initfini_array=no],
-	     [gcc_cv_initfini_array=no])])
+	     [gcc_cv_initfini_array=no])
+   else
+     AC_MSG_CHECKING(cross compile... guessing)
+     gcc_cv_initfini_array=no
+   fi])
   enable_initfini_array=$gcc_cv_initfini_array
 ])
 if test $enable_initfini_array = yes; then