--- a/configure	Thu Dec 11 23:29:12 2008 +0000
+++ b/configure	Mon Dec 15 10:44:56 2008 +0000
@@ -6745,6 +6745,94 @@
 
 
 
+{ $as_echo "$as_me:$LINENO: checking if we have a working __builtin_frame_address()" >&5
+$as_echo_n "checking if we have a working __builtin_frame_address()... " >&6; };
+if test "$cross_compiling" = yes; then
+  { { $as_echo "$as_me:$LINENO: error: cannot run test program while cross compiling
+See \`config.log' for more details." >&5
+$as_echo "$as_me: error: cannot run test program while cross compiling
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+else
+  cat >conftest.$ac_ext <<_ACEOF
+
+  /* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+void * __attribute__((noinline)) first_arg( void *x, void *y ) { return x; }
+int __attribute__((noinline)) foo( int arg, void *exc )
+{
+    if( arg < 2 ) {
+        *(((void **)__builtin_frame_address(0))+1) = exc;
+    }
+    return 0;
+}
+
+int main(int argc, char *argv[])
+{
+   goto *first_arg(&&start, &&except);
+
+start:
+   return foo( argc, &&except ) + 1;
+
+except:
+   return 0;
+}
+_ACEOF
+rm -f conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_link") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+  { (case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_try") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+
+   { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_FRAME_ADDRESS 1
+_ACEOF
+
+
+else
+  $as_echo "$as_me: program exited with status $ac_status" >&5
+$as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+( exit $ac_status )
+
+   { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+    { $as_echo "$as_me:$LINENO: WARNING: Memory exceptions will be slow" >&5
+$as_echo "$as_me: WARNING: Memory exceptions will be slow" >&2;}
+fi
+rm -rf conftest.dSYM
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+
+
+
+
 
 
 lxdream_save_cppflags="$CPPFLAGS"