From aa348abd15323e20a7ae40e4c312ff20bbf562cb Mon Sep 17 00:00:00 2001
From: Jeffrey Walton <noloader@gmail.com>
Date: Sat, 16 Sep 2017 02:19:06 -0400
Subject: [PATCH] Use -O3 for IBM XL C/C++ (GH #502) We held back XL C/C++ due
 to warnings and self test failures. Since clearing Issue 502, we are OK for
 -O3 so we can live with the warnings.

---
 GNUmakefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/GNUmakefile b/GNUmakefile
index 1882b6fd..4dfd11c1 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