This example relies on:
- the GNUstep libraries (libgnustep-gui, libgnustep-base)
and their dependencies (libiconv or glibc, and ffcall)
- the Objective C runtime libraries (libobjc)
GNUstep applications don't need to be configured or installed in order to run;
all you need is to
1. Prepare your environment, as described in the GNUstep-HOWTO
2. make
3. openapp Hello