#!/bin/sh
#
# Build 32- and 64-bit busybox binaries for release
#
TARGETS="build_32 build_64 build_64u"

if [ ! -d busybox-w32 ]
then
	echo "busybox-w32 doesn't exist"
	exit 0
fi

# remove old and make new build directories
for i in $TARGETS
do
	rm -rf $i
	cp -rp busybox-w32 $i
done

# apply default configuration
for i in $TARGETS
do
	if [ $i = "build_64" ]
	then
		CONFIG=mingw64_defconfig
		BITS=64
	elif [ $i = "build_64u" ]
	then
		CONFIG=mingw64u_defconfig
		BITS=64
	elif [ $i = "build_32" ]
	then
		CONFIG=mingw32_defconfig
		BITS=32
	fi

	(
		cd $i
		make ${CONFIG}
		# link time optimisation, fortify, stack protection
		sed -e 's/^CONFIG_EXTRA_CFLAGS="\(.*\)"$/CONFIG_EXTRA_CFLAGS="\1 -flto -fstack-protector --param=ssp-buffer-size=4"/' \
			-e 's/^CONFIG_EXTRA_CFLAGS=" /CONFIG_EXTRA_CFLAGS="/' \
			-e 's/^CONFIG_EXTRA_LDLIBS="\(.*\)"$/CONFIG_EXTRA_LDLIBS="\1 -l:libssp.a"/' \
			-e 's/^CONFIG_EXTRA_LDLIBS=" /CONFIG_EXTRA_LDLIBS="/' \
			-i .config 
		# does ld support --disable-reloc-section?
		eval $(grep CONFIG_CROSS_COMPILER_PREFIX .config)
		[ $BITS -eq 32 ] && [ -n "$CONFIG_CROSS_COMPILER_PREFIX" ] && \
			${CONFIG_CROSS_COMPILER_PREFIX}ld --help | \
				grep -q disable-reloc-section &&
					sed -e 's/^CONFIG_EXTRA_LDFLAGS="\(.*\)"$/CONFIG_EXTRA_LDFLAGS="\1 -Wl,--disable-reloc-section"/' \
						-e 's/^CONFIG_EXTRA_LDFLAGS=" /CONFIG_EXTRA_LDFLAGS="/' \
						-i .config
	)
done

# perform build
for i in $TARGETS
do
	BITS=64
	if [ $i = "build_32" ]
	then
		BITS=32
	fi

	(
	cd $i
	GCCV=$(rpm -q --qf '%{name} %{version}-%{release}\n' mingw${BITS}-gcc)
	CRTV=$(rpm -q --qf '%{name} %{version}-%{release}\n' mingw${BITS}-crt)
	make -j $(nproc) EXTRAVERSION="-`git describe --match=FRP`" MINGW_VER="$GCCV; $CRTV"
	)
done