/************************************************************************* *                 I.MX6 system.img unpack repack * 说明： *     以前的system.img直接ext4的，现在的system.img是data类型的，需要工具 * 进行转换才行，需要这些工具主要是还是为了减少开发中编译等待时间过长。 * *                                     2016-9-10 深圳 南山平山村 曾剑锋 ************************************************************************/一、参考文档：    1. Android中system.img的两种格式及其相互转换方法        http://www.th7.cn/Program/Android/201501/381202.shtml    2. ext4 unpack/repack tools        http://web.djodjo.org/article/download/android/tools/x86_linux/ext4tools二、执行命令：    1. source ./build/envsetup.sh     2. make img2simg_host三、编译输出信息：    ......    including ./system/security/softkeymaster/Android.mk ...    including ./system/vold/Android.mk ...    including ./tools/external/fat32lib/Android.mk ...    *** Overlay change detected, clean shared intermediate files...    *** rm -rf out/target/common/obj/APPS/framework-res_intermediates out/target/common/obj/APPS/Launcher2_intermediates out/target/common/obj/APPS/SettingsProvider_intermediates out/target/common/obj/APPS/Settings_intermediates out/target/common/obj/APPS/Bluetooth_intermediates    Import includes file: out/host/linux-x86/obj32/EXECUTABLES/img2simg_host_intermediates/import_includes    Header: out/target/product/generic/obj/include/libexpat/expat.h    Header: out/target/product/generic/obj/include/libexpat/expat_external.h    Header: out/target/product/generic/obj/include/libpng/png.h    Header: out/target/product/generic/obj/include/libpng/pngconf.h    Header: out/target/product/generic/obj/include/libpng/pngusr.h    Header: out/target/product/generic/obj/include/selinux/selinux.h    Header: out/target/product/generic/obj/include/selinux/label.h    Header: out/target/product/generic/obj/include/selinux/context.h    Header: out/target/product/generic/obj/include/selinux/avc.h    Header: out/target/product/generic/obj/include/selinux/android.h    Header: out/target/product/generic/obj/include/libsonivox/eas.h    Header: out/target/product/generic/obj/include/libsonivox/eas_types.h    Header: out/target/product/generic/obj/include/libsonivox/eas_reverb.h    Header: out/target/product/generic/obj/include/libsonivox/jet.h    Header: out/target/product/generic/obj/include/libsonivox/ARM_synth_constants_gnu.inc    Header: out/target/product/generic/obj/include/libwpa_client/wpa_ctrl.h    Header: out/target/product/generic/obj/include/libwpa_client/qca-vendor.h    host C: img2simg_host <= system/core/libsparse/img2simg.c    Export includes file: system/core/libsparse/Android.mk -- out/host/linux-x86/obj32/EXECUTABLES/img2simg_host_intermediates/export_includes    host Executable: img2simg_host (out/host/linux-x86/obj32/EXECUTABLES/img2simg_host_intermediates/img2simg)    Install: out/host/linux-x86/bin/img2simg#### make completed successfully (03:18 (mm:ss)) ####    zengjf@zengjf:~/myandroid$ 四、真正的img2simg    1. 上面编译出来的img2simg还是有问题，会报如下错误：        zengjf@zengjf:~/myandroid$ img2simg out/target/product/sabresd_6dq/obj/PACKAGING/systemimage_intermediates/system.img system.img        img2simg: ../../core/libsparse/sparse.c:143: write_all_blocks: Assertion `pad >= 0' failed.        Aborted (core dumped)    2. 下载参考文档中的img2simg，验证可行。