[Intel-gfx] [PATCH i-g-t 01/12] build: Define _GNU_SOURCE in Makefile.am

[Chris Wilson]

Quoting Daniel Vetter (2017-09-02 18:03:55)
> In meson I want to just set this everywhere (no reason not to), and
> doing so will allow us to clean up a few things.

GNU_SOURCE is defined in config.h, which should be included from all
files (at least those that depend on system library foibles). I presume
you intend to move all of config.h onto the command line?
-Chris