pkgconfig location wrong on fedora
So with meson, npupnp gets installed to /usr/local/lib64 which seems to be the correct path as projects wanting to use npupnp pick it up correctly.
With the autotools build, it gets installed to /usr/local/lib , which does not allow projects to pick it up. I work around this by exporting PKG_CONFIG_PATH:/usr/local/lib/pkgconfig , which seems to be a hack more than anything.