$NetBSD: patch-ab,v 1.1.1.1 2011/10/13 18:43:51 jmmv Exp $

Mangle some variables to ensure that the values we provide from the Makefile
package are properly propagated.  Also allow us to inject extra flags to the
compiler from the package.

--- src/Make.common.orig	2008-08-25 13:41:57.000000000 +0000
+++ src/Make.common
@@ -1,16 +1,16 @@
 # Paths that can be different in each installation:
 
 # Location of Boost libraries:
-BOOST_DIR = /usr/local/include/boost_1_36_0
+BOOST_DIR = undefined
 
 # Location of headers and libraries for the Tcl interpreter:
-TCLINCLUDE_DIR = /usr/include
-TCLLIB_DIR = /usr/lib
+TCLINCLUDE_DIR = undefined
+TCLLIB_DIR = undefined
 TCL_LIB = tcl
 
 
 # Common compilation options and choices:
-CXX = g++
-CXXFLAGS = -Wall -pedantic -W -Wshadow -O2
+CXX ?= g++
+CXXFLAGS += -Wall -pedantic -W -Wshadow -O2
 CXXFLAGS_BOOST = -Wall -pedantic -Wno-long-long -O2
 CXXFLAGS_TCL = -Wall -pedantic -W -Wshadow -Wno-long-long -O2