[dpdk-stable] [PATCH v5 04/17] build: define _GNU_SOURCE globally

[Bruce Richardson]

On Thu, Feb 25, 2021 at 07:22:37PM +0100, Thomas Monjalon wrote:
> There was an intent to define _GNU_SOURCE globally,
> but it was not set in pkg-config for external applications.
> 
Is this something that we really want to do, to force all external apps to
use _GNU_SOURCE when compiling? Do some of our header files rely on
definitions only available with _GNU_SOURCE? If so, we should probably look
to remove that dependency rather than mandating the define.