menuconfig FLTK bool "FLTK GUI Toolkit " depends on XFREE430 config FLTK_OPENGL bool prompt "Turn on OpenGL support" default y depends on FLTK config FLTK_THREADS bool prompt "Enable multi-threading support" default n depends on FLTK config FLTK_XFT bool prompt "Turn on Xft support" default n depends on FLTK config FLTK_XDBE bool prompt "Turn on Xdbe support" default n depends on FLTK config FLTK_FLUID bool prompt "Build FLUID and demos" default n depends on FLTK help fluid is an interactive GUI designer for FLTK and is needed to build some of the demos. When cross compiling FLTK fluid is built for the target platform. Thus it will most probably not run on your host and compiling the demo programs will fail. So you're better off leaving this disabled.