In several projects I maintain (e.g. PyAV, aiortc, aioquic..) I need to build additional libraries which then get shipped with the wheels. These additional libraries are built with a custom prefix (/tmp/vendor) so as to keep them explicitly separate from the system libraries.

In order to get auditwheel to pick up the additional libraries, I am forced to add /tmp/vendor/lib to LD_LIBRARY_PATH in my cibuildwheel configuration. However this is very error prone, as it can break other parts of the build.

Would you be open to a PR which introduces an --add-path command-line flag in order to pass additional directories to auditwheel during it's search for libraries? The name of the option was chosen so as to match the one used by delvewheel [1], the Windows counterpart of auditwheel.

[1] https://github.com/adang1345/delvewheel