Sarek

I got this going by using a new version of `m4/ax_lua.m4` from [here](https://www.gnu.org/software/autoconf-archive/ax_lua.html) and adjusting the `configure.ac` file a bit. With this, configuration succeeded, but building failed: ``` ../src/3rdparty/lunar/lunar.h: In...

No worries, I will sign in the next days, just haven't gotten around to it