What environment variables are used by GLE?
The GLE_USRLIB environment variable is used to locate include files. It can contain a list of paths separated by your platforms path separator (; Windows : Unix). This is much like the PATH environment variable used by your operating system. When running the makefile, I get an error that it can’t find tiffio.h You need to install libtiff. Or you can disable TIFF support in config.i by opening config.i with an editor and following instructions for disabling TIFF support.