That project generates a Python binary wheel through CMake. Its purpose is to add a test case for a pull request for the auditwheel project (pypa/auditwheel#28), enabling to repair Linux binary wheels generated trough the help of the manylinux project (https://github.com/pypa/manylinux).

The wheel produced with this sample CMake project contains two modules : zliblinkage and pnglinkage.

The zliblinkage module contains one extension module _zliblinkage linked to a shared library named libzliblinkage itself linked against zlib.

The pnglinkage module contains one extension module _pnglinkage linked to a shared library named libpnglinkage itself linked against libpng and zlib.

The libzliblinkage.so and libpnglinkage.so files are already bundled in the wheel along with the extension modules. Rpaths have been correctly set in order for the auditwheel tool to no graft those libraries but only the ones provided by the system.