Another patch derived from the packaging work. I've checked that this doesn't affect "normal" installations, but it's certainly necessary for building the Python extensions when the installation destination isn't included in the include and lib paths (which is probably rather abnormal for the make; make install procedure, but a typical scenario when building for packaging).
Another patch derived from the packaging work. I've checked that this doesn't affect "normal" installations, but it's certainly necessary for building the Python extensions when the installation destination isn't included in the include and lib paths (which is probably rather abnormal for the make; make install procedure, but a typical scenario when building for packaging).