http://sourceforge.net/p/flwm/flwm/ci/3938480dc18b56a2eaf3cb9302b6ebfe6cb3064e/tree/Makefile?diff=11e88c7fc9d5a2817425528742a425f85e7aa0a0

--- Makefile.orig	Sat Jun 27 19:05:02 2015
+++ Makefile	Sat Jun 27 19:05:22 2015
@@ -3,7 +3,7 @@ SHELL=/bin/sh
 PROGRAM = flwm
 VERSION = 1.02
 
-CXXFILES = main.C Frame.C Rotated.C Menu.C FrameWindow.C Desktop.C Hotkeys.C
+CXXFILES = main.C Frame.C Menu.C FrameWindow.C Desktop.C Hotkeys.C
 
 LIBS = -lfltk