gentoo-overlay/sci-mathematics/sympow/files/sympow-2.023.6-dont-force-O3.patch

From d5fd3ce4221705c59dc289f14f5aefc2f974ba41 Mon Sep 17 00:00:00 2001
From: Michael Orlitzky <michael@orlitzky.com>
Date: Thu, 14 May 2020 18:45:59 -0400
Subject: [PATCH 1/1] Configure: don't force -O3 in CFLAGS.

The build system already respects the user's CFLAGS. It should respect
lower -O levels as well. This is a "requirement" on Gentoo.
---
 Configure | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/Configure b/Configure
index 1ef9756..fd5555c 100755
--- a/Configure
+++ b/Configure
@@ -104,15 +104,12 @@ CFLAGS=''
 # return 2 if we did not add $FLAG.
 try_add_CFLAG()
 {
-    # We use -O3 here to really force generation of fused
-    # multiply-add instructions and to keep floats as much as
-    # possible in registers.
     # We compile in the fpu.c which only does
     # something if the macro x86 is defined.
     local flag=$1                      # first argument:  C FLAG to test
     local bypassfputest=${2:-nobypass} # second argument: whether or not bypass the numerical test (default: not)
     local status=0
-    if $CC $ORIGINALCFLAGS -Werror $CFLAGS -O3 $flag config/fpubits1.c config/fpubits2.c fpu.c -o config/fpubits 2>/dev/null; then
+    if $CC $ORIGINALCFLAGS -Werror $CFLAGS $flag config/fpubits1.c config/fpubits2.c fpu.c -o config/fpubits 2>/dev/null; then
         # Compiled successfully, now run it
         config/fpubits >/dev/null 2>/dev/null
         status=$?
@@ -166,7 +163,7 @@ for FLAG in '' '-ffloat-store' '-O0'; do
 done
 
 # Check the actual FPU precision with our new flags.
-CC_ARGS="$ORIGINALCFLAGS -O3 $CFLAGS config/fpubits1.c config/fpubits2.c fpu.c -o config/fpubits"
+CC_ARGS="$ORIGINALCFLAGS $CFLAGS config/fpubits1.c config/fpubits2.c fpu.c -o config/fpubits"
 $CC $CC_ARGS
 if [ $? -ne 0 ]; then
 echo >&2 "Error: the command below failed:"
@@ -256,7 +253,7 @@ echo "CONFEXE = config/endiantuple config/fpubits" >> $FILE
 ##
 ##echo "DEFS = $DEFS" >> $FILE
 
-OPT="-O3 ${CFLAGS}" && echo "OPT = $OPT" >> $FILE
+OPT="${CFLAGS}" && echo "OPT = $OPT" >> $FILE
 
 echo "H2MFLAGS = \\" >> $FILE
 echo "	--manual=\"SYMPOW package\" \\" >> $FILE
-- 
2.26.2