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# Maintainer: Natanael Copa <ncopa@alpinelinux.org>
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_flavor=grsec
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pkgname=linux-${_flavor}
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pkgver=2.6.31.4
_kernver=2.6.31
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pkgrel=0
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pkgdesc="Linux kernel with grsecurity"
url=http://grsecurity.net
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depends="mkinitfs linux-firmware"
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makedepends="perl installkernel"
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_config=${config:-kernelconfig.${CARCH:-x86}}
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install=
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source="ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-$_kernver.tar.bz2
	ftp://ftp.kernel.org/pub/linux/kernel/v2.6/patch-$pkgver.bz2
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	grsecurity-2.1.14-2.6.31.4-200910181015.patch
	kernelconfig.x86
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	"
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subpackages="$pkgname-dev linux-firmware:firmware"
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license="GPL-2"
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_abi_release=${pkgver}-${_flavor}

_prepare() {
	cd "$srcdir"/linux-$_kernver
	if [ "$_kernver" != "$pkgver" ]; then
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		bunzip2 -c < ../patch-$pkgver.bz2 | patch -p1 -N || return 1
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	fi

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	for i in ../*.diff ../*.patch; do
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		[ -f $i ] || continue
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		msg "Applying $i..."
		patch -p1 -N < $i || return 1
	done

	mkdir -p "$srcdir"/build
	cp "$srcdir"/$_config "$srcdir"/build/.config
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	make -C "$srcdir"/linux-$_kernver O="$srcdir"/build HOSTCC="$CC" \
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		silentoldconfig
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}

# this is so we can do: 'abuild menuconfig' to reconfigure kernel
menuconfig() {
	_prepare
	cd "$srcdir"/build
	make menuconfig
	cp .config "$startdir"/$_config
}

build() {
	_prepare || return 1
	cd "$srcdir"/build
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	make CC="$CC" || return 1
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	mkdir -p "$pkgdir"/boot "$pkgdir"/lib/modules
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	make modules_install install \
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		INSTALL_MOD_PATH="$pkgdir" \
		INSTALL_PATH="$pkgdir"/boot

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#	ln -s vmlinuz-${_abi_release} "${pkgdir}"/boot/$_flavor
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	rm -f "$pkgdir"/lib/modules/${_abi_release}/build \
		"$pkgdir"/lib/modules/${_abi_release}/source
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	install -D include/config/kernel.release \
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		"$pkgdir"/usr/share/kernel/$_flavor/kernel.release
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}

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dev() {
	# copy the only the parts that we really need for build 3rd party
	# kernel modules and install those as /usr/src/linux-headers,
	# simlar to what ubuntu does
	#
	# this way you dont need to install the 300-400 kernel sources to 
	# build a tiny kernel module
	#
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	pkgdesc="Headers and script for third party modules for grsec kernel"
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	local dir="$subpkgdir"/usr/src/linux-headers-${_abi_release}
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	# first we import config, run prepare to set up for building 
	# external modules, and create the scripts
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	mkdir -p "$dir"
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	cp "$srcdir"/$_config "$dir"/.config
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	make -j1 -C "$srcdir"/linux-$_kernver O="$dir" HOSTCC="$CC" \
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		silentoldconfig prepare scripts

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	# remove the stuff that poits to real sources. we want 3rd party
	# modules to believe this is the soruces
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	rm "$dir"/Makefile "$dir"/source

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	# copy the needed stuff from real sources
	#
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	# this is taken from ubuntu kernel build script
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	# http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-jaunty.git;a=blob;f=debian/rules.d/3-binary-indep.mk;hb=HEAD
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	cd "$srcdir"/linux-$_kernver
	find . -path './include/*' -prune -o -path './scripts/*' -prune \
		-o -type f \( -name 'Makefile*' -o -name 'Kconfig*' \
		-o -name 'Kbuild*' -o -name '*.sh' -o -name '*.pl' \
		-o -name '*.lds' \) | cpio -pdm "$dir"
	cp -a drivers/media/dvb/dvb-core/*.h "$dir"/drivers/media/dvb/dvb-core
	cp -a drivers/media/video/*.h "$dir"/drivers/media/video
	cp -a drivers/media/dvb/frontends/*.h "$dir"/drivers/media/dvb/frontends
	cp -a scripts include "$dir"
	find $(find arch -name include -type d -print) -type f \
		| cpio -pdm "$dir"
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	install -Dm644 "$srcdir"/build/Module.symvers \
		"$dir"/Module.symvers
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	mkdir -p "$subpkgdir"/lib/modules/${_abi_release}
	ln -sf /usr/src/linux-headers-${_abi_release} \
		"$subpkgdir"/lib/modules/${_abi_release}/build
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}

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firmware() {
	pkgdesc="Firmware for linux kernel"
	replaces="linux-grsec linux-vserver"
	mkdir -p "$subpkgdir"/lib
	mv "$pkgdir"/lib/firmware "$subpkgdir"/lib/
}

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md5sums="84c077a37684e4cbfa67b18154390d8a  linux-2.6.31.tar.bz2
02078f4231baee4f0004212f2875df2b  patch-2.6.31.4.bz2
d4a3559a00702e4c6d6f3b7d64f72dcc  grsecurity-2.1.14-2.6.31.4-200910181015.patch
25d08b2d9f22a06994b1e45ab8276a7b  kernelconfig.x86"