Building a hello world application

Revision as of 19:20, 16 July 2007

Preparation

This guide assumes that you have performed the steps in Building_OpenMoko_from_scratch

The commandline program

Store the following more or less standard hello world code in hello.c

#include <stdio.h>

int main()
{
  printf ("Hello World\n");
  return 0;
}

Compiling it the wrong / easy way

Assuming your current working directory is /home/moko,
and that you stored the code in /home/moko/hello.c

It should now be possible to compile the application using

./build/tmp/cross/arm-linux/bin/gcc -o hello hello.c

Testing it

Assuming you have followed Setting up USB connection and you have a working network concetion to either a qemu Neo or a real Neo.

scp hello root@192.168.0.202:/tmp/
ssh root@192.168.0.202 /tmp/hello

This sequence of commands ought to give you a nice Hello World, btw. the default root password is blank, just press return.

Why was it the wrong way?

OpenMoko uses [OpenEmbedded] and they use bitbake when building stuff

Compiling it using bitbake

To be written

Creating an ipkg package

To be written