Comment 1 for bug 481833

Sounds like your system's include path is not setup properly if it can't locate a common include directory like /opt/local/include. I don't see a reason to hardcode an include path; it could in fact break builds for other mac users (see bug #362878). I would suggest you fix your system's include path or add -I/opt/local/include to CXXFLAGS before executing scons (`CXXFLAGS=-I/opt/local/include scons`). You can also export the CXXFLAGS in your profile so it is set automatically at startup.