# -O3 makes GCC do loopy things. So, don't use -O3, use -O2 instead.

# Not for upstream.

--- configure 2014-12-08 05:42:51.000000000 -0800

+++ configure 2016-01-20 08:22:03.089548131 -0800

@@ -11879,14 +11879,14 @@

{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_check_compiler_flags" >&5

$as_echo "$ax_check_compiler_flags" >&6; }

if test "x$ax_check_compiler_flags" = xyes; then

- CFLAGS="-O3 -qansialias -w $xlc_opt"

+ CFLAGS="-O2 -qansialias -w $xlc_opt"

else

- CFLAGS="-O3 -qansialias -w"

+ CFLAGS="-O2 -qansialias -w"

echo "******************************************************"

echo "* You seem to have the IBM C compiler. It is *"

echo "* recommended for best performance that you use: *"

echo "* *"

- echo "* CFLAGS=-O3 -qarch=xxx -qtune=xxx -qansialias -w *"

+ echo "* CFLAGS=-O2 -qarch=xxx -qtune=xxx -qansialias -w *"

echo "* ^^^ ^^^ *"

echo "* where xxx is pwr2, pwr3, 604, or whatever kind of *"

echo "* CPU you have. (Set the CFLAGS environment var. *"

@@ -11896,7 +11896,7 @@

;;

- intel) CFLAGS="-O3 -ansi_alias"

+ intel) CFLAGS="-O2 -ansi_alias"

if test "x$acx_maxopt_portable" = xno; then

icc_archflag=unknown

icc_flags=""

@@ -12069,7 +12069,7 @@

gnu)

# default optimization flags for gcc on all systems

- CFLAGS="-O3 -fomit-frame-pointer"

+ CFLAGS="-O2 -fno-omit-frame-pointer"

# -malign-double for x86 systems

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts -malign-double" >&5

@@ -12590,10 +12590,10 @@

echo "********************************************************"

echo "* WARNING: Don't know the best CFLAGS for this system *"

echo "* Use ./configure CFLAGS=... to specify your own flags *"

- echo "* (otherwise, a default of CFLAGS=-O3 will be used) *"

+ echo "* (otherwise, a default of CFLAGS=-O2 will be used) *"

echo "********************************************************"

echo ""

- CFLAGS="-O3"

+ CFLAGS="-O2"

fi

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether C compiler accepts $CFLAGS" >&5