Fix compiler warning for ppoll() on Cygwin
authorPeter Eisentraut <peter@eisentraut.org>
Sun, 22 Dec 2019 22:20:00 +0000 (23:20 +0100)
committerPeter Eisentraut <peter@eisentraut.org>
Sun, 22 Dec 2019 22:20:00 +0000 (23:20 +0100)
commit127ccb37251744c0fad2df0f3f67dd2c38fe8389
treef20568c75f15fb46055c4de23f6fb63d0755f63f
parent5406513e997f5ee9de79d4076ae91c04af0c52f6
Fix compiler warning for ppoll() on Cygwin

_GNU_SOURCE is required to get the prototype, so just define that
globally, as was already done in the linux template.

Discussion: https://www.postgresql.org/message-id/flat/6b467edc-4018-521f-ab18-171f098557ca%402ndquadrant.com
src/template/cygwin