For compiling Geany yourself, you will need the GTK (>= 2.6.0) libraries and header files. You will also need the Pango, Glib and ATK libraries and header files. All these files are available at http://www.gtk.org.

Furthermore you need, of course, a C compiler and the Make tool; a C++ compiler is also required for the included Scintilla library. The GNU versions of these tools are recommended.