Hello! I'm having big problems with compiling a simple program for my OpenWRT device.

Can someone please help me to set-up the compiling environment and tell me what do I have to run to successfully compile a program.
I don't need to compile a package, just a simple binary program, that I need for a serial port communication.

1.
I have TP-Link WR741ND v4.22 with ATTITUDE ADJUSTMENT (12.09-rc1, r34185).

I installed openwrt-ar71xx-generic-tl-wr741nd-v1-squashfs-sysupgrade.bin from here
http://downloads.openwrt.org/attitude_a … x/generic/

I obtained

OpenWrt-Toolchain-ar71xx-for-mips_r2-gcc-4.6-linaro_uClibc-0.9.33.2.tar.bz2

from the same link above.
For compiling I use debian.

2.
I don't know if I'm doing right, but tell me...
Where do I need to put my c_source_file.c?
And then I have to run

mips-openwrt-linux-uclibc-gcc

from toolchain-mips_r2_gcc-4.6-linaro_uClibc-0.9.33.2/bin (downloaded toolchain above).

Am I doing right?

I did like this for kamikaze and everything worked well. But now on new router and ATTITUDE ADJUSTMENT I can't get things working.

Help, please, I'm not really a Linux programer, but i need this program to compile

(Last edited by pcpostar on 6 Apr 2013, 18:54)

I get error:

mips-openwrt-linux-uclibc-gcc.bin: warning: environment variable 'STAGING_DIR' not defined
test_for_compiling.c:3:20: fatal error: iostream: No such file or directory
compilation terminated.

Ok, i found a sollution how to simple cross-compile a program for openwrt...

You need source.c of your program
You need appropriate toolchain for the version of openwrt you are using.

Then you have to execute

export STAGING_DIR=/home/jordan/wr741nd/OpenWrt-Toolchain-ar71xx-for-mips_r2-gcc-4.6-linaro_uClibc-0.9.33.2

...or where you have your toolchain

Then you compile your source.c program with:

/home/jordan/wr741nd/OpenWrt-Toolchain-ar71xx-for-mips_r2-gcc-4.6-linaro_uClibc-0.9.33.2/bin/mips-openwrt-linux-gcc source.c -o output_file_name

Feel free to ask for any details.
Hope it helps.

I also try to found a sollution how to simple cross-compile a program for openwrt.

do you need an openwrt package or just binary for openwrt?

(Last edited by pcpostar on 16 Apr 2013, 11:44)

... and you fixed it by following pcpostar's suggestion above???

I followed pcpostar's instructions, but when I do that, I either get a Segmentation Fault, or I get "cannot execute binary file".  I know the code works because if I compile it on ubuntu, it runs (it's just a simple printf statement).

The results I get depend upon where I point STAGING_DIR.  I have tried two different ways:

export STAGING_DIR = ~/openwrt/attitude_adjustment/staging_dir/toolchain_mips_r2_gcc-4.6-linaro_uClibc-0.9.33.2
and
export STAGING_DIR = ~/OpenWRT-SDK/staging_dir/toolchain_mips_r2_gcc-4.6-linaro_uClibc-0.9.33.2

Does anyone know how to diagnose either of these two problems?