#!/bin/bash

# Default cflags
CFLAGS="-O3 -fomit-frame-pointer -Wall"

uname -a | grep -q "Darwin Kernel Version 9"
LEOPARD=$?
uname -a | grep -q "Darwin Kernel Version 8"
TIGER=$?
uname -a | grep -q ppc64
G5=$?
uname -m | grep -q x86_64
X86_64=$?

# Assume machines running leopard are 64-bit intel, and g5's on linux need
# this flag (O3 is optimal on both of these, interestingly enough)
if [ $LEOPARD = 0 -o $G5 = 0 ]; then
	CFLAGS="$CFLAGS -m64"
fi
# OSX is picky and needs libcrypto instead of lssl
if [ $LEOPARD = 0 -o $TIGER = 0 ]; then
	LDFLAGS="-lcrypto"
	CFLAGS="$CFLAGS -DTIGER"
else
	LDFLAGS="-lssl"
fi
# -O4 actually helps on ppc, hurts significantly on intel
if [ $TIGER = 0 ]; then
    CFLAGS="$CFLAGS -O4"
fi
# -ffast-math hurts (377K/s -> 342K/s) on Linux mustang 2.6.26.8-57.fc8 #1 SMP Thu Dec 18 19:19:45 EST 2008 i686 i686 i386 GNU/Linux
if ! uname -a | grep -q 'i686.*GNU/Linux'; then
    CFLAGS="$CFLAGS -ffast-math"
fi

# kianna (x86_64) reports significantly better speeds with O2 than O3
if [ $TIGER = 1 -a $LEOPARD = 1 -a $X86_64 = 0 ]; then
    CFLAGS="$CFLAGS -O2"
fi

echo "Using $CFLAGS $LDFLAGS"

gcc -o runner $CFLAGS $LDFLAGS runner.c