commit b02a167af3d2a47c155bce123820cbb5fa19dc9c
Author: Michael Catanzaro <mcatanzaro@gnome.org>
Date:   Tue Apr 14 13:51:01 2015 -0500

    Silence clang's -Wunknown-attribute
    
    Clang doesn't have perfect feature compatibility with GCC,
    unfortunately.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=747870
