# SliTaz package receipt.

PACKED_SIZE="1.1M"
UNPACKED_SIZE="1.9M"
PACKAGE="linux"
VERSION="2.6.20"
CATEGORY="base-system"
SHORT_DESC="The Linux kernel."
TARGET="i486"
MAINTAINER="devel@slitaz.org"
LICENSE="GPL2"
TARBALL="$PACKAGE-$VERSION.tar.bz2"
WEB_SITE="http://www.kernel.org/"
WGET_URL="https://www.kernel.org/pub/linux/kernel/v${VERSION:0:3}/$TARBALL"
AUTO_SELECTION="always"

DEPENDS=""
BUILD_DEPENDS="slitaz-toolchain perl git lzma wget upx"
INSTALL_DEPENDS="lz4 grep"

case "$TARGET" in
	i486) SUGGESTED="memtest ipxe plop tfttest x86test";;  # bundle may install a boot menu
esac

S2bin()
{
	[ -s $stuff/$1.S ] &&
	cc $2 -o $1.o -Wa,-algms=$1.lst -c $stuff/$1.S &&
	objcopy -O binary $1.o $1.bin
}

rootfs()
{
	[ -s $stuff/root.cpio ] && cp $stuff/root.cpio . &&
	sed -i 's|CONFIG_INITRAMFS_SOURCE="|&root.cpio|' .config
}

setup_code()
{
	echo $((514 + $(od -An -j 513 -N 1 -i $1)))
}

# Rules to configure and make the package.
compile_rules()
{
	export CFLAGS="-march=i386 -Os -pipe -fomit-frame-pointer"
	for i in $stuff/linux-$VERSION-*.u ; do
		patch -p0 < $i
	done
	sed -i 's/O_CREAT/&|O_TRUNC/' init/initramfs.c
	sed -i 's|hostname|echo tank|' scripts/mkcompile_h

	mkdir $src/slitaz
	cp $stuff/list_modules.sh $src/slitaz
	S2bin bootloader
	S2bin helper
	S2bin unpacklz4
	cp $stuff/pack .
	sh ./pack --build

	sed -i '/config %config:/{NNNps/config %config:/%config:/}' Makefile &&
	sed -i 's/^config %config:/config:/' Makefile
	
	#2.6.20
	sed -i '/\/ %\/:/{NNps/\/ %\/:/%\/:/}' Makefile &&
	sed -i 's/^\/ %\/:/\/:/' Makefile
	sed -i 's|.*netinet/in|#include <limits.h>\n&|' scripts/mod/sumversion.c
	
	cp $stuff/linux-$VERSION-slitaz.config .config
	rootfs
	yes '' | make ARCH=i386 HOSTCC=gcc config
	make ARCH=i386 CC=gcc HOSTCC=gcc -j 4 bzImage
	cp arch/i386/boot/bzImage arch/i386/boot/bzImage.made.386
	
	grep -q "CONFIG_MODULES=y" .config &&
	make ARCH=i386 CC=gcc HOSTCC=gcc -j 4 modules &&
	make ARCH=i386 INSTALL_MOD_PATH=$DESTDIR -j 1 modules_install || true
	S2bin bundle
	cp $stuff/bundle .
	sh ./bundle
	S2bin cmdline -DEDIT_CMDLINE ; mv cmdline.bin editcmdline.bin
	S2bin cmdline
	[ $(upx --version 2> /dev/null | sed '/upx/!d;s|upx ||;s|\.||;q')0 -ge 3960 ] &&
		upx --ultra-brute arch/i386/boot/bzImage
	cp arch/i386/boot/bzImage arch/i386/boot/bzImage.386
	cp .config .config.386
	cp System.map System.map.386
	cp $stuff/linux-$VERSION-slitaz.config.586 .config
	rootfs
	yes '' | make ARCH=i386 HOSTCC=gcc config
	make ARCH=i386 CC=gcc HOSTCC=gcc -j 4 bzImage
	cp arch/i386/boot/bzImage arch/i386/boot/bzImage.made
	which upx 2> /dev/null && upx --ultra-brute arch/i386/boot/bzImage
}

# Rules to gen a SliTaz package suitable for Tazpkg.
genpkg_rules()
{
	mkdir $fs/boot
	cp -a $src/pack $fs/boot/
	cp -a $src/bundle.sh $fs/boot/bundle
	cp -a $src/editcmdline.bin $fs/boot/cmdline.bin
	for i in '' .386 ; do
		[ -s $src/arch/i386/boot/bzImage$i ] || continue
		cp -a $src/arch/i386/boot/bzImage$i $fs/boot/
		dd if=$src/bootloader.bin of=$fs/boot/bzImage$i conv=notrunc
		dd if=$src/cmdline.bin bs=1 seek=$(setup_code $fs/boot/bzImage$i) of=$fs/boot/bzImage$i conv=notrunc
		cp -a $src/System.map$i $fs/boot/
		cp -a $src/.config$i $fs/boot/config$i
	done
}

config_form()
{
	cat <<EOT
<p>
Tune the kernel according to the CPU type
</p>
<table>
<tr>
<td><input type="radio" name="CPU586" $([ "$CPU586" = "no" ] && echo "checked=checked ")value="no"> for any CPU starting from 386sx</td>
<td><input type="radio" name="CPU586" $([ "$CPU586" != "no" ] && echo "checked=checked ")value="yes"> optimized for pentium or newer CPU</td>
</tr>
</table>
<input type="checkbox" name="EDIT_CMDLINE" ${EDIT_CMDLINE:+ckecked="ckecked" }/>
The user can edit the kernel cmdline at boot time.
EOT
}

# Pre and post install commands for Tazpkg.
post_install()
{
	for i in $1/boot/*.386 ; do
		[ "$CPU586" = "yes" ] && rm -f $i || mv -f $i ${i%.386}
	done 2> /dev/null
	[ "$EDIT_CMDLINE" ] &&
		dd if=$1/boot/cmdline.bin bs=1 seek=$(setup_code $1/boot/bzImage) of=$1/boot/bzImage conv=notrunc
	[ -s $1/boot/cmdline ] && cat $1/boot/cmdline | sed 's/^ *//' | \
		dd of=$1/boot/bzImage conv=notrunc bs=1 seek=768 count=3072
	$1/boot/pack $1/boot/bzImage
}