/*********************************************************************************
* Android Kernel save defalut config
* 说明：
* 一个没注意设置环境变量，把默认的配置文件给操作没了。
*
* 2017-11-13 深圳 南山平山村 曾剑锋
********************************************************************************/
一、获取config文件名
including ./system/netd/server/Android.mk ...
including ./system/security/keystore-engine/Android.mk ...
including ./system/security/keystore/Android.mk ...
including ./system/security/softkeymaster/Android.mk ...
including ./system/vold/Android.mk ...
including ./tools/external/fat32lib/Android.mk ...
No private recovery resources for TARGET_DEVICE sabresd_6dq
make -C kernel_imx imx_v7_android_defconfig ARCH=arm CROSS_COMPILE=`pwd`/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin/arm-eabi- LOADADDR=0x10008000
make[1]: Entering directory `/home/desk/myandroid/kernel_imx'
#
# configuration written to .config
#
make[1]: Leaving directory `/home/desk/myandroid/kernel_imx'
install -D kernel_imx/.config out/target/product/sabresd_6dq/.config
make -C kernel_imx -j20 uImage ARCH=arm CROSS_COMPILE=`pwd`/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin/arm-eabi- LOADADDR=0x10008000
make[1]: Entering directory `/home/desk/myandroid/kernel_imx'
scripts/kconfig/conf --silentoldconfig Kconfig
make[1]: Leaving directory `/home/desk/myandroid/kernel_imx'
make[1]: Entering directory `/home/desk/myandroid/kernel_imx'
CHK include/config/kernel.release
CHK include/generated/uapi/linux/version.h
^Cmake[1]: *** [include/config/kernel.release] Interrupt
make: *** [out/target/product/sabresd_6dq/kernel] Interrupt
二、找出文件位置
desk@desk-ubuntu:~/myandroid/kernel_imx$ find * -iname imx_v7_android_defconfig
arch/arm/configs/imx_v7_android_defconfig
三、操作过程
1. 设置ARM环境变量，否者会进入x86内核状态：
export ARCH=arm
export CROSS_COMPILE=~/myandroid/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin/arm-eabi-
2. make menuconfig
3. make savedefconfig
4. cp defconfig arch/arm/configs/imx_v7_android_defconfig
