From 4670e3d5bce96c1a6105e2d4092b3d38c0e92893 Mon Sep 17 00:00:00 2001
From: Jeffrey Walton <noloader@gmail.com>
Date: Sat, 16 Sep 2017 05:55:37 -0400
Subject: [PATCH] Revert "Use -O3 for IBM XL C/C++ (GH #502)"

This reverts commit aa348abd15323e. It caused a hang in the TEA algorithm. Also see GH #503.
---
 GNUmakefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/GNUmakefile b/GNUmakefile
index 4dfd11c1..1882b6fd 100755
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -379,9 +379,9 @@ ifeq ($(XLC_COMPILER),1)
       CXXFLAGS := $(CXXFLAGS:-fPIC=-qpic)
   endif
   # Warnings and intermittent failures on early IBM XL C/C++
-  #ifneq ($(findstring -O3,$(CXXFLAGS)),)
-  #    CXXFLAGS := $(CXXFLAGS:-O3=-O2)
-  #endif
+  ifneq ($(findstring -O3,$(CXXFLAGS)),)
+      CXXFLAGS := $(CXXFLAGS:-O3=-O2)
+  endif
 endif
 
 endif	# IS_X86