From b7292f4f195ff93ff401597b189a74c51272e475 Mon Sep 17 00:00:00 2001
From: Eric Hameleers <alien@slackware.com>
Date: Mon, 3 Aug 2015 23:36:18 +0000
Subject: gcc-multilib: add c89.sh and c99.sh scripts for better POSIX
 compliance. Switch the 32bit ARCH to i586.

---
 current/gcc/gcc-multilib.SlackBuild | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

(limited to 'current')

diff --git a/current/gcc/gcc-multilib.SlackBuild b/current/gcc/gcc-multilib.SlackBuild
index e8b3db8..2f370ac 100755
--- a/current/gcc/gcc-multilib.SlackBuild
+++ b/current/gcc/gcc-multilib.SlackBuild
@@ -44,9 +44,17 @@
 # I see no reason to continue 386 support in the latest Slackware (and indeed
 # it's no longer easily possible).
 
+# Some more notes, Mon Aug  3 19:49:51 UTC 2015:
+#
+# Changing to -march=i586 for 32-bit x86 as several things (Mesa being one of
+# them) no longer work if constrained to -march=i486.  We're not going to use
+# -march=i686 since the only additional opcode is CMOV, which is actually less
+# efficient on modern CPUs running in 32-bit mode than the alternate i586
+# instructions.  No need to throw i586 CPUs under the bus (yet).
+
 PKGNAM=gcc
 VERSION=${VERSION:-4.9.2}
-BUILD=${BUILD:-2alien}
+BUILD=${BUILD:-3alien}
 
 # How many jobs to run in parallel:
 NUMJOBS=" -j7 "
@@ -60,7 +68,7 @@ echo "Building these compilers: $LANGS"; sleep 5
 export MARCH=$( uname -m )
 if [ -z "$ARCH" ]; then
   case "$MARCH" in
-    i?86)    export ARCH=i486 ;;
+    i?86)    export ARCH=i586 ;;
     armv7hl) export ARCH=$MARCH ;;
     arm*)    export ARCH=arm ;;
     # Unless $ARCH is already set, use uname -m for all other archs:
@@ -407,7 +415,7 @@ ANTLJAR=$(echo $CWD/antlr-*.jar | tail -1)
   # If enough people need "treelang" support for it may be considered.
   #  --enable-languages=ada,c,c++,fortran,java,objc,treelang
   # I think it's incorrect to include this option (as it'll end up set
-  # to i486 on x86 platforms), and we want to tune the binary structure
+  # to i586 on x86 platforms), and we want to tune the binary structure
   # for i686, as that's where almost all of the optimization speedups
   # are to be found.
   # Correct me if my take on this is wrong.
@@ -557,6 +565,9 @@ rm -f $PKG1/usr/lib/libgcj-tools.a
   ln -sf gfortran-gcc-$VERSION ${TARGET}-g77
   ln -sf gfortran g77
   ln -sf gfortran f77
+  cat $CWD/c89.sh > c89
+  cat $CWD/c99.sh > c99
+  chmod 755 c89 c99
 )
 
 ( cd $PKG1/usr/man
-- 
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