As X11 includes live in /usr/include on linux the previous
path was wrong anyway so switch to a path which should work
on other systems (does not break linux).
-XINCLUDE = /usr/include/X11
+XINCLUDE = /usr/X11R6/include
TCLHOME = ../tcl
TKHOME = ../tk
TCLXHOME = ../tclx
RANLIB_CMD=ranlib
MCS_CMD=true
TCL_TK_LIBS= -L/usr/X11/lib -lX11 -lm -lXpm
-XINCLUDE=/usr/include/X11
+XINCLUDE=/usr/X11R6/include
TCL_MAN_SEPARATOR=
TCL_DIR = ../tcl
TCLX_DIR = ../tclx/src
-XINCLUDE = /usr/include/X11
+XINCLUDE = /usr/X11R6/include
XLIB = -L/usr/X11R6/lib -lX11 -lXpm
LIBS = libtk.a $(TCL_DIR)/libtcl.a