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#!/bin/bash -e
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#
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# Build ARM kernel 4.1.7 for QEMU Raspberry Pi Emulation
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#
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#######################################################
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TOOLCHAIN=arm-linux-gnueabihf
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sudo apt-get update && sudo apt-get install git libncurses5-dev gcc-arm-linux-gnueabihf
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git clone https://github.com/raspberrypi/linux.git
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cd linux
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# checking out 4.1.7+ branch - change it if you want to change kernel version
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# for kernel specific hash, have a looks at : https://github.com/raspberrypi/linux/commits/rpi-4.1.y
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# git checkout 77798915750db46f10bb449e1625d6368ea42e25
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patch -p1 < ../linux-arm.patch
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make ARCH=arm versatile_defconfig
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cat >> .config << EOF
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CONFIG_CROSS_COMPILE="$TOOLCHAIN"
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CONFIG_CPU_V6=y
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CONFIG_ARM_ERRATA_411920=y
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CONFIG_ARM_ERRATA_364296=y
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CONFIG_AEABI=y
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CONFIG_OABI_COMPAT=y
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CONFIG_PCI=y
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CONFIG_SCSI=y
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CONFIG_SCSI_SYM53C8XX_2=y
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CONFIG_BLK_DEV_SD=y
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CONFIG_BLK_DEV_SR=y
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CONFIG_DEVTMPFS=y
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CONFIG_DEVTMPFS_MOUNT=y
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CONFIG_TMPFS=y
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CONFIG_INPUT_EVDEV=y
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CONFIG_EXT3_FS=y
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CONFIG_EXT4_FS=y
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CONFIG_VFAT_FS=y
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CONFIG_NLS_CODEPAGE_437=y
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CONFIG_NLS_ISO8859_1=y
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CONFIG_FONT_8x16=y
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CONFIG_LOGO=y
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CONFIG_VFP=y
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CONFIG_CGROUPS=y
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EOF
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make -j 4 -k ARCH=arm CROSS_COMPILE=${TOOLCHAIN}- menuconfig
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make -j 4 -k ARCH=arm CROSS_COMPILE=${TOOLCHAIN}- bzImage
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cd ..
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cp linux/arch/arm/boot/zImage kernel-qemu
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