From 253cdef84d56961d386cee911a0d1b32fe8a7fc0 Mon Sep 17 00:00:00 2001
From: Niko Tyni <ntyni@debian.org>
Date: Tue, 8 Jul 2014 23:04:30 +0300
Subject: Downgrade the optimization of regcomp.c on mips and mipsel due to a
 gcc-4.9 bug

  % cat ~/t.pl
  print ( (q{foo'} =~ /[^']+'/) ?  "ok\n" : "not ok\n" );
  % perl ~/t.pl
  ok
  % ./miniperl ~/t.pl
  not ok

This only happens with -fPIC -ftree-vrp builds.
It is a regression from gcc-4.8.

Bug-Debian: http://bugs.debian.org/754054
Bug: https://rt.perl.org/Ticket/Display.html?id=122817
Patch-Name: fixes/regcomp-mips-optim.diff
---
 cflags.SH | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cflags.SH b/cflags.SH
index 54ce74c995..0c39d18f14 100755
--- a/cflags.SH
+++ b/cflags.SH
@@ -292,6 +292,11 @@ for file do
     # or customize here
 
     case "$file" in
+    regcomp) : work around http://bugs.debian.org/754054
+        case $archname in
+        mips-*|mipsel-*)
+            optimize="$optimize -fno-tree-vrp";;
+        esac;;
     *) ;;
 
     # Customization examples follow: