On OS X, when the default gcc available is llvm-gcc, switch to either…

… gcc-4.2 or disable all optimizations (should allow the build to complete as well)

kerl

@@ -1,5 +1,6 @@
 #! /bin/sh
 
+# Copyright (c) 2011 Spawngrid, Inc
 # Copyright (c) 2011 Evax Software <contact(at)evax(dot)org>
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -67,6 +68,15 @@ case "$KERL_SYSTEM" in
         MD5SUM="openssl md5"
         MD5SUM_FIELD=2
         SED_OPT=-E
+        if [ `gcc --version | grep llvm | wc -l` = "1" ]; then
+            if [ -x `which gcc-4.2` ]; then
+                echo "Adjust compiler settings for OS X: using gcc-4.2"
+                KERL_CONFIGURE_OPTIONS="CC=gcc-4.2 $KERL_CONFIGURE_OPTIONS"
+            else
+                echo "Adjust compiler settings for OS X: using -O0"
+                KERL_CONFIGURE_OPTIONS="CFLAGS=-O0 $KERL_CONFIGURE_OPTIONS"
+            fi
+        fi
         ;;
     *)
         MD5SUM=md5sum