Fix out-of-tree build includes of config.h

If a file in the same directory as config.h, e.g. wireshark-qt.cpp
has a #include "config.h", or another header it includes also has
a #include "config.h", then an out-of-tree build, e.g. CMake will
pick up any in-tree config.h and odd things may happen.  The correct
form is #include <config.h> which will pick up the out-of-tree
version.

To find this, introduce a deliberate error and then make an out-of-tree
build, noting where it fails and fix that file.  If that file includes
other files that still cause the build to fail, set the compiler
to emit the pre-processed version so you can locate the include with
the next errant "config.h".  Repeat ad nauseum.

Possibly all includes of "config.h" should be changed to <config.h>

Revert "CMake: Clobber the top-level config.h before we build."

This reverts commit 1f3849ce614aeae5fda742beffe5558e7c2a8b71.

Ping-Bug: 10301
Change-Id: Ie567e7cc696fd48f3e730fc27032c5d2a7d8f341
Reviewed-on: https://code.wireshark.org/review/6285
Reviewed-by: Graham Bloice <graham.bloice@trihedral.com>
Petri-Dish: Graham Bloice <graham.bloice@trihedral.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Gerald Combs <gerald@wireshark.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/codecs/codecs.h b/codecs/codecs.h
index 794cd32b63..80d0d71e2f 100644
--- a/codecs/codecs.h
+++ b/codecs/codecs.h
@@ -23,7 +23,7 @@
 #ifndef _CODECS_H_
 #define _CODECS_H_
 
-#include "config.h"
+#include <config.h>
 
 #include <epan/epan.h>
 #include "ws_symbol_export.h"