#!/bin/sh

# Attempt to build a universal library for OSX

set -e

done=
dp="$(xcode-select -print-path 2>/dev/null)"
: "${dp:=/Developer}"

gc40="$(command -v gcc-4.0 2>/dev/null)"
gc42="$(command -v gcc-4.2 2>/dev/null)"
mp42="$(command -v gcc-apple-4.2 2>/dev/null)"
lv42="$(command -v llvm-gcc-4.2 2>/dev/null)"
gca0=
gca2=
if [ -n "$gc42" ]; then
	gca2="$gc42"
elif [ -n "$mp42" ]; then
	gca2="$mp42"
elif [ -n "$lv42" ]; then
	gca2="$lv42"
fi
if [ -n "$gc40" ]; then
	gca0="$gc40"
elif [ -n "$gca2" ]; then
	gca0="$gca2"
fi

if [ -d "$dp/SDKs" ]; then
	# First see if 10.4u is available and gcc-4.0
	if [ -z "$done" -a -r "$dp/SDKs/MacOSX10.4u.sdk/SDKSettings.plist" -a -n "$gc40" ]; then
		done=1
		NEWCC="$gc40"
		NEWCFLAGS="-arch x86_64 -arch ppc64 -arch i386 -arch ppc"
		NEWCFLAGS="$NEWCFLAGS -isysroot$dp/SDKs/MacOSX10.4u.sdk"
	fi
	# Or see if 10.5 is available, any compiler will do
	if [ -z "$done" -a -r "$dp/SDKs/MacOSX10.5.sdk/SDKSettings.plist" -a -n "$gca0" ]; then
		done=1
		NEWCC="$gca0"
		NEWCFLAGS="-arch x86_64 -arch ppc64 -arch i386 -arch ppc"
		NEWCFLAGS="$NEWCFLAGS -isysroot$dp/SDKs/MacOSX10.5.sdk"
	fi
	# Or see if 10.6 is available, any 4.2 compiler will do
	if [ -z "$done" -a -r "$dp/SDKs/MacOSX10.6.sdk/SDKSettings.plist" -a -n "$gca2" ]; then
		done=1
		NEWCC="$gca2"
		NEWCFLAGS="-arch x86_64 -arch i386 -arch ppc"
		NEWCFLAGS="$NEWCFLAGS -isysroot$dp/SDKs/MacOSX10.6.sdk"
	fi
	# Or see if 10.7 is available, any 4.2 compiler will do
	if [ -z "$done" -a -r "$dp/SDKs/MacOSX10.7.sdk/SDKSettings.plist" -a -n "$gca2" ]; then
		done=1
		NEWCC="$gca2"
		NEWCFLAGS="-arch x86_64 -arch i386"
		NEWCFLAGS="$NEWCFLAGS -isysroot$dp/SDKs/MacOSX10.7.sdk"
	fi
fi

if [ -z "$done" ]; then
	# Select by OS version as we have no SDKs
	dv="$(sysctl -n kern.osrelease 2>/dev/null | cut -d. -f1 2>/dev/null)"
	if [ -z "$done" -a "$dv" = "8" ]; then
		# Tiger 10.4.x
		done=1
		NEWCC="$gca0"
		# Tiger's system libraries are not guaranteed to be universal
	fi
	if [ -z "$done" -a "$dv" = "9" ]; then
		# Leopard 10.5.x
		done=1
		NEWCC="$gca0"
		NEWCFLAGS="-arch x86_64 -arch ppc64 -arch i386 -arch ppc"
	fi
	if [ -z "$done" -a "$dv" = "10" ]; then
		# Snow Leopard 10.6.x
		done=1
		NEWCC="$gca2"
		NEWCFLAGS="-arch x86_64 -arch i386 -arch ppc"
	fi
	if [ -z "$done" -a "$dv" = "11" ]; then
		# Lion 10.7.x
		done=1
		NEWCC="$gca2"
		NEWCFLAGS="-arch x86_64 -arch i386"
	fi
fi
if [ -n "$NEWCC" -a -z "$CC" ]; then
	CC="$NEWCC" && export CC
fi
if [ -n "$done" ]; then
	if [ -z "$MACOSX_DEPLOYMENT_TARGET" ]; then
		MACOSX_DEPLOYMENT_TARGET=10.4 && export MACOSX_DEPLOYMENT_TARGET
	fi
fi
if [ -n "$NEWCFLAGS" ]; then
	if [ -z "$CFLAGS" ]; then
		CFLAGS="-O2 $NEWCFLAGS" && export CFLAGS
	else
		CFLAGS="$CFLAGS $NEWCFLAGS" && export CFLAGS
	fi
fi
build="$(dirname "$0")/buildlib"
if [ -n "$MACOSX_DEPLOYMENT_TARGET" ]; then
	echo "MACOSX_DEPLOYMENT_TARGET=$MACOSX_DEPLOYMENT_TARGET"
fi
exec "$build" "$@"