--- ./SConstruct.orig	Wed Jun  6 10:07:47 2007
+++ ./SConstruct	Wed Dec  5 23:19:09 2007
@@ -27,6 +27,14 @@
 if build_info['cross']:
   base_env.Tool('crossmingw', toolpath=['build'])
 
+# Respect CC, CXX, CCFLAGS, CPPPATH and LIBPATH command-line parameters.
+for key in ['CC', 'CXX']:
+  if key in ARGUMENTS:
+    base_env[key] = ARGUMENTS[key]
+for key in ['CCFLAGS', 'CPPPATH', 'LIBPATH']:
+  if key in ARGUMENTS:
+    base_env[key] = Split(ARGUMENTS[key])
+
 # warnings
 base_env.Append(CCFLAGS = ['-Wall'])