Under Linux, you should have no problems compiling xflame, just use these commands: xmkmf make make install Most other Unices should work the same way, here are the ones that need some extra work: SOLARIS (probably many other commercial Unices) Imake does not include -lposix4, you'll have to add that parameter by hand to the Imakefile. Edit the line that defines the LOCAL_LIBRARIES (near the bottom of the Makefile) to look like this: LOCAL_LIBRARIES = $(XLIB) -lposix4 Then continue as above. Does anyone know how to specify this in the Imakefile so that platforms that need it will link with libposix4?