diff -uNr lcdtest-1.18.ORIG/SConstruct lcdtest-1.18/SConstruct
--- lcdtest-1.18.ORIG/SConstruct	2013-04-17 14:32:37.735358663 +0100
+++ lcdtest-1.18/SConstruct	2013-04-17 14:33:52.706359788 +0100
@@ -119,10 +119,10 @@
 # code
 #-----------------------------------------------------------------------------
 
-build_dir = 'build/'
+variant_dir = 'build/'
 
 SConscript ('src/SConscript',
-            build_dir = build_dir,
+            variant_dir = variant_dir,
             duplicate = 0,
 	    exports = {'env' : env})
 
@@ -137,7 +137,7 @@
 #-----------------------------------------------------------------------------
 
 SConscript ('desktop/SConscript',
-	   build_dir = build_dir + '/desktop',
+	   variant_dir = variant_dir + '/desktop',
 	   duplicate = 0)
 
 #-----------------------------------------------------------------------------
diff -uNr lcdtest-1.18.ORIG/src/SConscript lcdtest-1.18/src/SConscript
--- lcdtest-1.18.ORIG/src/SConscript	2013-04-17 14:32:37.734358663 +0100
+++ lcdtest-1.18/src/SConscript	2013-04-17 14:32:54.194358910 +0100
@@ -17,6 +17,7 @@
 # along with this program.  If not, see see <http://www.gnu.org/licenses/>.
 
 import os
+import SCons.Util
 
 Import('env')
 
@@ -29,13 +30,18 @@
 
 objs = [env.Object(src) for src in srcs]
 
-# respect the environment CFLAGS if given
-if 'CFLAGS' in ARGUMENTS:
-    env.MergeFlags (ARGUMENTS ['CFLAGS'])
-elif 'CFLAGS' in os.environ:
-    env.MergeFlags (os.environ ['CFLAGS'])
-else:
-    env.Append (CCFLAGS = ['-g', '-Wall', '-Wextra'])
+# respect the environments flags if given
+
+if os.environ.has_key('CC'):
+	env['CC'] = os.environ['CC']
+if os.environ.has_key('CFLAGS'):
+	env['CCFLAGS'] += SCons.Util.CLVar(os.environ['CFLAGS'])
+if os.environ.has_key('CXX'):
+	env['CXX'] = os.environ['CXX']
+if os.environ.has_key('CXXFLAGS'):
+	env['CXXFLAGS'] += SCons.Util.CLVar(os.environ['CXXFLAGS'])
+if os.environ.has_key('LDFLAGS'):
+	env['LINKFLAGS'] += SCons.Util.CLVar(os.environ['LDFLAGS'])
 
 env.Append (LIBS = ['SDL', 'SDL_image', 'SDL_ttf']);