mk_kernel_l90.sh

Script to build kernel for LG L90

#!/bin/bash

TOP=/media/system1/root/CM14
SOURCE=$TOP/kernel/lge/msm8226
OUT=$TOP/out/target/product/w7
OBJ=$OUT/obj/KERNEL_OBJ
GCC=/media/system1/root/l90/gcc-prebuilts/bin/arm-gnu-linux-androideabi-

do_kern_build() {
	JOB_NUM=8
	VERBOSE=0

	[ ! -z $1 ] && JOB_NUM=$1
	[ ! -z $2 ] && VERBOSE=$2

	rm -fr $OUT/arch/arm/boot $OUT/dt.img $OUT/boot.img $OUT/ramdisk.img $OUT/kernel

	make -C $SOURCE O=$OBJ ARCH=arm CROSS_COMPILE=" $GCC" w7ds_lineageos_defconfig
	make -j$JOB_NUM V=$VERBOSE -C $SOURCE O=$OBJ ARCH=arm CROSS_COMPILE=" $GCC"

	cp $OBJ/arch/arm/boot/zImage $OUT/kernel

	$TOP/out/host/linux-x86/bin/mkbootfs $OUT/root | gzip -9 > $OUT/ramdisk.img
	$TOP/out/host/linux-x86/bin/dtbToolCM  -o $OUT/dt.img -s 2048 -p $OBJ/scripts/dtc/ $OBJ/arch/arm/boot/

	$TOP/out/host/linux-x86/bin/mkbootimg  --kernel $OUT/kernel \
--ramdisk $OUT/ramdisk.img --cmdline \
"console=ttyHSL0,115200,n8 androidboot.console=ttyHSL0 user_debug=31 msm_rtb.filter=0x37 androidboot.hardware=qcom androidboot.selinux=permissive" \
--base 0x00000000 --pagesize 2048 --dt $OUT/dt.img --ramdisk_offset 0x01000000 --tags_offset 0x00000100 \
--output $OUT/boot.img

	size=$(for i in $OUT/boot.img; do stat --format "%s" "$i" | tr -d '\n'; echo +; done; echo 0);
	total=$(( $( echo "$size" ) ));
	printname=$(echo -n "$OUT/boot.img" | tr " " +);
	img_blocksize=135168;
	twoblocks=$((img_blocksize * 2));
	onepct=$(((((17301504 / 100) - 1) / img_blocksize + 1) * img_blocksize));
	reserve=$((twoblocks > onepct ? twoblocks : onepct));
	maxsize=$((17301504 - reserve));
	echo "$printname maxsize=$maxsize blocksize=$img_blocksize total=$total reserve=$reserve";
	if [ "$total" -gt "$maxsize" ]; then 
		echo "error: $printname too large ($total > [17301504 - $reserve])";
		false; 
	elif [ "$total" -gt $((maxsize - 32768)) ]; then 
		echo "WARNING: $printname approaching size limit ($total now; limit $maxsize)";
	fi 
	cp $OUT/boot.img .

	VERSION=$(git -C $SOURCE describe --tags | head -n 1)
	zip -9r cm14_kernel-$VERSION.zip  boot.img system/ META-INF/
}

do_kern_build $1 $2

Good Job!