when building on debian, gpgme 1.13.0 wants to ship gpgme-glib.pc for the native development libraries, despite the only references to glib in the codebase referring to the win32 platform (e.g. src/w32-glib-io.c). It doesn't make sense to ship gpgme-glib.pc on a platform that doesn't need it.

Shipping gpgme-glib.pc should probably be conditional on build_w32_glib.