FcPatternAddWeak(3) on Linux
The text 43d99ee36923, as Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
Add a value to a pattern with weak binding
The text 43d99ee36923, as Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
Add a value to a pattern with weak binding