diff -Naur DRAWxtl-o/source/DRAWshell43/Makefile DRAWxtl/source/DRAWshell43/Makefile
--- DRAWxtl-o/source/DRAWshell43/Makefile	2007-10-30 14:33:31.000000000 +0100
+++ DRAWxtl/source/DRAWshell43/Makefile	2007-10-30 14:13:37.000000000 +0100
@@ -34,12 +34,12 @@
   CXX             = g++
 
 # flags for C++ compiler:
-  OPTIM           = -g -O2 -Wall -Wunused  -fno-exceptions
-  CXXFLAGS        = $(OPTIM)  -I/usr/X11R6/include
+  OPTIM           = $(CFLAGS) -Wall -Wunused  -fno-exceptions
+  CXXFLAGS        = $(OPTIM)  -I/usr/X11R6/include -I/usr/include/fltk-1.1/
 
 # libraries to link with:
   GLDLIBS  =  -L/usr/X11R6/lib  -lglut -lGLU -lGL -lXinerama -lXft -lpthread -lm  -lXext -lX11 -lXpm
-  LINKFLTKGL  = -L$(libdir) -lfltk_gl -lfltk
+  LINKFLTKGL  = -L$(libdir) -lfltk_gl -lfltk -L/usr/lib/fltk-1.1/
 
 # The extension to use for executables...
   EXEEXT          =
diff -Naur DRAWxtl-o/source/DRAWxtl43/Makefile DRAWxtl/source/DRAWxtl43/Makefile
--- DRAWxtl-o/source/DRAWxtl43/Makefile	2007-10-30 14:33:31.000000000 +0100
+++ DRAWxtl/source/DRAWxtl43/Makefile	2007-10-30 14:09:29.000000000 +0100
@@ -27,7 +27,7 @@
   CXX = g++
 
 # flags for C++ compiler:
-  OPTIM  = -g -O  -Wunused  -fno-exceptions -Wall
+  OPTIM  = $(CFLAGS) -Wunused  -fno-exceptions -Wall
   CXXOPT = $(OPTIM)  -I/usr/X11R6/include
 
   GLUTlib2 =
@@ -37,8 +37,8 @@
 
   # standard Linux GLut locations:
 
-  GLUTinclude = /usr/local/include
-  GLUTlib = /usr/local/lib
+  GLUTinclude = /usr/include
+  GLUTlib = /usr/lib
   GLUTcopt = -I$(GLUTinclude)
   GLUTlib1 = -L$(GLUTlib) -lglut -lGLU -lGL -ldl -lm -L/usr/X11R6/lib -lX11 -lm -lXi
 # RedHat or Fedora Core users will probably need to uncomment the following line