If you want to get started developing Pthread Pool, you can do the following:
Make sure you have autoconf, libtool and a C compiler/toolchain installed. On my Ubuntu I just had to do 'apt-get install libtool autoconf build-essential'.
Get the latest source. If you don't have read-write access you can download the read-only source and get git to generate patches.
Run './autogen.sh' from the source directory.
Run the usual './configure && make && make install' (though I normally './configure --prefix=$(pwd)-install').
Run the tests, just for sanity's sake, by doing 'make check'.
You can run a distribution test (makes sure the library can rebuild itself) with 'make distcheck' - do this if you alter the build system by e.g. adding/removing files, playing with automake/autoconf etc.