Cross-compiling applications for ARM

cross-compiling-hello-world

$ pwd
/home/alexandernst/tmp_arm_build
$ cat hello_world.c 
#include <stdio.h>

int main(int argc, char **argv){
        printf("Hello world!\n");
        return 0;
}
$ gcc -o hello_world hello_world.c 
$ file hello_world
hello_world: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, BuildID[sha1]=890ead80cd49432f62fdea2309329a4f42c22c61, not stripped
$ ./hello_world 
Hello world!
$ sb2 gcc -o hello_world hello_world.c 
$ file hello_world
hello_world: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.16, not stripped
$ qemu-arm -L /home/alexandernst/tmp_buildroot/buildroot-2013.02_clean/buildroot-2013.02/output/host/opt/ext-toolchain/arm-none-linux-gnueabi/libc/ ./hello_world
Hello world!
$