doc: emphasize that config.h must be first
commitb502e350547614f1a12ba5f8fa3666d38e65ecc7
authorEric Blake <eblake@redhat.com>
Wed, 25 Jan 2017 19:36:04 +0000 (25 13:36 -0600)
committerEric Blake <eblake@redhat.com>
Wed, 25 Jan 2017 19:42:01 +0000 (25 13:42 -0600)
tree4394a1a4e4eb69969e7f8ec0bb75bc529f664b05
parent60460b91d0944a376063edd4ef09112a21ffa3d6
doc: emphasize that config.h must be first

* doc/autoconf.texi (C and Posix Variants, System Services):
Remind user to include config.h first.
(Configuration Headers): Give another reason why config.h must be
first, and mention that only .c files need it.
Based on discussion on bugs.debian.org/158969

Signed-off-by: Eric Blake <eblake@redhat.com>
doc/autoconf.texi