# Commandline

Let’s start colm with the --help command line argument.

    colm --help

| This reflects the development version 0.13.0.4;

```usage: colm [options] file general: -h, -H, -?, --help print this usage and exit -v --version print version information and exit -o <file> write output to <file> -c compile only (don’t produce binary) -e <file> write C export header to <file> -x <file> write C export code to <file> -m <file> write C++ commit code to <file> -a <file> additional code file to include in output program ```

This reveals us some more insights: it reads a colm file and creates a object file with eventually cpp/h/x code.