"{Source}chdir.c.x" Ä {Makefile} "{Source}chdir.c"
{PPCC} "{Source}chdir.c" -o "{Source}chdir.c.x" {Make-DocFile-PPCCOptions}
"{Source}chdir.c.x" Ä {Makefile} "{Source}chdir.c"
{PPCC} "{Source}chdir.c" -o "{Source}chdir.c.x" {Make-DocFile-PPCCOptions}