The easiest way to build a new client (X application) is to use
xmkmf if an Imakefile is included in the sources. Type
``xmkmf -a'' to create the Makefiles, check the configuration if
necessary and type ``xmake''. ``xmake'' is a wrapper for the
GNU make program which defeats the improper SHELL setting typically found
in a Makefile generated from an Imakefile. Also see the XFree86/OS2 FAQ
for more hints about porting X clients.