This repository is intended at checking glib macro
re-export detection in two levels dependencies.
The detection mechanism used to stop at the first identified crate known
to re-export glib and which was found in Cargo.toml. When used in a crate
that depends both on gstreamer and gtk and gtk is optional, the detection
mechanism stopped at gtk and prepended gtk to glib, leading to errors
compiling glib proc-macros.