hi Malte i have now tried all the versions of fltk available... 1.7, 2.0.x-r6101, and version 2 from the SVN. i have compiled these from source but i still can't work out how to get the scons script to find fltk headers. what am i doing wrong here. do i need somthing else in my scons file? the SContruct file seems to be looking for Fl.h which i have at /usr/include/fltk-1.1/FL/Fl.H guiconf.Chguiconf.CheckLibWithHeader('fltk', 'FL/Fl.h','c++') thanks.. scons still reports (using fltk 2 and svn 2) ~/programsSRC/MinicomputerV1.1 $ scons scons: Reading SConscript files ... Minicomputer-------------- - 1/2:configuring Checking for C library jack... yes Checking for C library lo... yes Checking for C library asound... yes Checking for C library pthread... yes - checking dependencies for the editor: Checking for C library lo... yes Checking for C++ library fltk... no Did not find FLTK for the gui, exiting! ------------------------------------------------------------------ tail of scons config.log ----- scons: Configure: Checking for C++ library fltk... .sconf_temp/conftest_5.cpp <- | | |#include "FL/Fl.h" | |int |main() { | |return 0; |} | g++ -o .sconf_temp/conftest_5.o -c .sconf_temp/conftest_5.cpp .sconf_temp/conftest_5.cpp:3:19: error: FL/Fl.h: No such file or directory scons: Configure: no --- using gentoo....