--without-bzlib option doesn't work
This configure option should cause darshan-runtime to build without using the bz2 libraries, but it doesn't seem to work. If the build system has bz2 headers and libraries in the right path then it finds them and uses them anyway.
This isn't really a problem for end users, but it is annoying for development when you want to test how darshan will behave on systems without bz2.