Openwrt Cross-compiling Helloword

After installing the OPENWRT system on the router, it is necessary to cross-compile the binary program of the MIPS architecture on the host machine and then copy to the router to run the program.

1. Build a cross-compilation environment

Cross-compilation requires a cross-compilation toolchain when compiling OpenWrt. Cross-compiling toolchain and builds, we just need to add the path to the system environment variable.

exportstaging_dir=/path/to/openwrt/trunk/staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uclibc-0.9.33.2 /   exportpath= $PATH: $STAGING _dir/bin   

where staging_dir each person's path is not the same, need to change according to their own circumstances.

2. Hello Word Program

Create a new test.c file, add

#include <stdio.h>voidmain () {    printf ("Hello world\n");    return;}

In the terminal, enter the compile command:

./MIPSEL-OPENWRT-LINUX-GCC Test.c-o Test

Finally generate test program, through SCP or other means to copy to the router, run on the router, output

[Email protected]:~#./testhello World

Openwrt Cross-compiling Helloword