#define HAVE_FORCED_UNWIND 1
_ACEOF
+ old_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Werror -fexceptions"
+ echo "$as_me:$LINENO: checking for C cleanup handling" >&5
+echo $ECHO_N "checking for C cleanup handling... $ECHO_C" >&6
+if test "${libc_cv_c_cleanup+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+ cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+
+#include <stdio.h>
+void cl (void *a) { }
+extern c (void);
+int
+main ()
+{
+
+ int a __attribute__ ((cleanup (cl)));
+ puts ("test")
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+ (eval $ac_link) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest$ac_exeext'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ libc_cv_c_cleanup=yes
+else
+ echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+libc_cv_c_cleanup=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $libc_cv_c_cleanup" >&5
+echo "${ECHO_T}$libc_cv_c_cleanup" >&6
+ CFLAGS="$old_CFLAGS"
+ if test $libc_cv_c_cleanup = no; then
+ { { echo "$as_me:$LINENO: error: the compiler must support C cleanup handling" >&5
+echo "$as_me: error: the compiler must support C cleanup handling" >&2;}
+ { (exit 1); exit 1; }; }
+ fi
fi
libc_cv_forced_unwind=yes, libc_cv_forced_unwind=no)])
if test $libc_cv_forced_unwind = yes; then
AC_DEFINE(HAVE_FORCED_UNWIND)
+dnl Check for C cleanup handling.
+ old_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Werror -fexceptions"
+ AC_CACHE_CHECK([for C cleanup handling], libc_cv_c_cleanup, [dnl
+ AC_TRY_LINK([
+#include <stdio.h>
+void cl (void *a) { }
+extern c (void);], [
+ int a __attribute__ ((cleanup (cl)));
+ puts ("test")],
+libc_cv_c_cleanup=yes, libc_cv_c_cleanup=no)])
+ CFLAGS="$old_CFLAGS"
+ if test $libc_cv_c_cleanup = no; then
+ AC_MSG_ERROR([the compiler must support C cleanup handling])
+ fi
fi