SET CLIPPER     Runtime configuration                     (runtime)
 SET CLIPPERCMD  Set default compiler options              (compiler)
 SET INCLUDE     Paths to search for header files          (compiler)
 SET LIB         Paths to search for (.lib, .plt, .pll)    (linker, runtime)
 SET OBJ         Paths to search for object files (.obj)   (linker)
 SET PLL         Paths to search for .plt and .pll files   (linker, runtime)
 SET RMAKE       Set default RMAKE command line options    (make)
 SET RTLINKCMD   Set default .RTLink command line options  (linker)
 SET TMP         Location for creating temporary files     (compiler, linker)