MCMapper is a project mainly written in C and C++, it's free.
A 2D Map Generator for MCServer
You should be able to open the Xcode project and click Build, you will then find your executable in the Build/Release folder.
Nothing special is required, just GCC.
To build from source, you should be able to just type make in the source folder and all should be good, you will find your executable in the same directory as the makefile.