Ubuntu本身是不支持arm架构的，但是可以通过qemu来执行，编译可以使用gcc对于arm的交叉编译器。
下面的命令是用来安装qemu和gcc for arm的：
sudo apt install qemu gcc-5-arm-linux-gnueabihf gcc-5-multilib-arm-linux-gnueabihf下面是gcc的命令：
arm-linux-gnueabihf-addr2line arm-linux-gnueabihf-gcc-nm-5 arm-linux-gnueabihf-nm
arm-linux-gnueabihf-ar arm-linux-gnueabihf-gcc-ranlib-5 arm-linux-gnueabihf-objcopy
arm-linux-gnueabihf-as arm-linux-gnueabihf-gcov-5 arm-linux-gnueabihf-objdump
arm-linux-gnueabihf-c++filt arm-linux-gnueabihf-gcov-dump-5 arm-linux-gnueabihf-ranlib
arm-linux-gnueabihf-cpp-5 arm-linux-gnueabihf-gcov-tool-5 arm-linux-gnueabihf-readelf
arm-linux-gnueabihf-dwp arm-linux-gnueabihf-gprof arm-linux-gnueabihf-size
arm-linux-gnueabihf-elfedit arm-linux-gnueabihf-ld arm-linux-gnueabihf-strings
arm-linux-gnueabihf-gcc-5 arm-linux-gnueabihf-ld.bfd arm-linux-gnueabihf-strip
arm-linux-gnueabihf-gcc-ar-5 arm-linux-gnueabihf-ld.gold下面我们来编译一下：
root@1afe15b25d69:~# cat main.c
#include<stdio.h>
int main()
{
printf("hello world\n");
return 0;
}
root@1afe15b25d69:~# arm-linux-gnueabihf-gcc-5 -o main main.c
root@1afe15b25d69:~# ls -l
total 16
-rwxr-xr-x 1 root root 8344 Feb 13 17:00 main
-rw-r--r-- 1 root root 77 Feb 13 16:58 main.c直接运行是不行的，如下面所示：
root@1afe15b25d69:~# ./main
-bash: ./main: cannot execute binary file: Exec format error
root@1afe15b25d69:~# file main
main: ELF 32-bit LSB shared object, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 3.2.0, BuildID[sha1]=cdb542c00934db3b58d2fd566e245f919262f416, not stripped所以我们使用qemu-arm来运行：
root@1afe15b25d69:~# qemu-arm ./main
/lib/ld-linux-armhf.so.3: No such file or directory如上所示，缺少了/lib/ld-linux-armhf.so.3，让我们来找找这个文件在哪。
root@1afe15b25d69:~# find / -name ld-linux-armhf.so.3
find: ‘/proc/1/map_files’: Operation not permitted
find: ‘/proc/22/map_files’: Operation not permitted
find: ‘/proc/50/map_files’: Operation not permitted
find: ‘/proc/55/map_files’: Operation not permitted
find: ‘/proc/56/map_files’: Operation not permitted
find: ‘/proc/57/map_files’: Operation not permitted
find: ‘/proc/58/map_files’: Operation not permitted
find: ‘/proc/59/map_files’: Operation not permitted
find: ‘/proc/63/map_files’: Operation not permitted
find: ‘/proc/68/map_files’: Operation not permitted
find: ‘/proc/79/map_files’: Operation not permitted
find: ‘/proc/1599/map_files’: Operation not permitted
/usr/arm-linux-gnueabihf/lib/ld-linux-armhf.so.3
/usr/arm-linux-gnueabi/libhf/ld-linux-armhf.so.3然后使用下面的命令创建软链接：
ln -s /usr/arm-linux-gnueabihf/lib/ld-linux-armhf.so.3 /lib/ld-linux-armhf.so.3再运行试试：
root@1afe15b25d69:~# qemu-arm ./main
./main: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory还是不行，正如错误所说找不到基地址库，让我们再找找：
root@1afe15b25d69:~# find / -name libc.so.6
/lib/x86_64-linux-gnu/libc.so.6
/lib/i386-linux-gnu/libc.so.6
find: ‘/proc/1/map_files’: Operation not permitted
find: ‘/proc/22/map_files’: Operation not permitted
find: ‘/proc/50/map_files’: Operation not permitted
find: ‘/proc/55/map_files’: Operation not permitted
find: ‘/proc/56/map_files’: Operation not permitted
find: ‘/proc/57/map_files’: Operation not permitted
find: ‘/proc/58/map_files’: Operation not permitted
find: ‘/proc/59/map_files’: Operation not permitted
find: ‘/proc/63/map_files’: Operation not permitted
find: ‘/proc/68/map_files’: Operation not permitted
find: ‘/proc/79/map_files’: Operation not permitted
find: ‘/proc/1603/map_files’: Operation not permitted
/usr/arm-linux-gnueabihf/lib/libc.so.6
/usr/arm-linux-gnueabihf/libsf/libc.so.6
/usr/arm-linux-gnueabi/lib/libc.so.6
/usr/arm-linux-gnueabi/libhf/libc.so.6
/lib32/libc.so.6
/libx32/libc.so.6知道地址后可以直接执行下面的命令让系统会到该目录去查找库：
export LD_LIBRARY_PATH=/usr/arm-linux-gnueabihf/lib/:$LD_LIBRARY_PATH再运行看看就没问题了：
root@1afe15b25d69:~# export LD_LIBRARY_PATH=/usr/arm-linux-gnueabihf/lib/:$LD_LIBRARY_PATH
root@1afe15b25d69:~# qemu-arm ./main
hello world为了方便也可以直接把该命令写入自启动脚本：
echo "export LD_LIBRARY_PATH=/usr/arm-linux-gnueabihf/lib/:$LD_LIBRARY_PATH" >> ~/.bashrc