/**************************************************************************** *      can‘t set android permissions - built without android support * 说明： *     昨天在使用Ubuntu自带的mkuserimg打包Android ext4镜像时出现这个错误，今天 * 找一下原因，解决一下。 * *                                          2016-9-10 深圳 南山平山村 曾剑锋 ***************************************************************************/一、参考文档：    1. [Bug 1293267] Re: make_ext4fs results in "can‘t set android permissions - built without android support"        https://lists.ubuntu.com/archives/foundations-bugs/2014-October/213902.html二、原因解释如下：    1. When trying to use make_ext4fs command(through the mkuserimg script), it errors out with "can‘t set android permissions - built without android support", solution was to compile from source and add "-Icore/include -DANDROID" parameter, works fine.    2. 从上可知，是make_ext4fs编译时参数没给对；    3. 从Android源码编译的角度来说是编译成功了，也就是说Ubuntu自带了一个make_ext4fs，但没有添加Android的支持，所以只需要将Android编译出来的bin文件路径添加到PATH最前面就可以解决了。        export PATH=/home/zengjf/myandroid/out/host/linux-x86/bin:$PATH三、运行效果如下：    zengjf@zengjf:~/myandroid$ mkuserimg.sh -s out/target/product/sabresd_6dq/system out/target/product/sabresd_6dq/obj/PACKAGING/systemimage_intermediates/system.img ext4 system 374476800 out/target/product/sabresd_6dq/root/file_contexts    make_ext4fs -s -T -1 -S out/target/product/sabresd_6dq/root/file_contexts -l 374476800 -a system out/target/product/sabresd_6dq/obj/PACKAGING/systemimage_intermediates/system.img out/target/product/sabresd_6dq/system    Creating filesystem with parameters:        Size: 374476800        Block size: 4096        Blocks per group: 32768        Inodes per group: 7632        Inode size: 256        Journal blocks: 1428        Label:         Blocks: 91425        Block groups: 3        Reserved block group size: 23    Created filesystem with 1304/22896 inodes and 79090/91425 blocks    zengjf@zengjf:~/myandroid$