From c6fb9ee21495a06ece8681e81872dd23d0d4be85 Mon Sep 17 00:00:00 2001
From: Alexis La Goutte <alexis.lagoutte@gmail.com>
Date: Mon, 6 Mar 2017 21:22:39 +0100
Subject: [PATCH] Add -Wduplicated-branches to extra warnings

Change-Id: I11d60b4405f4fde039affcdeebb13a3ceb2aded6
Reviewed-on: https://code.wireshark.org/review/20428
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Reviewed-by: Michael Mann <mmann78@netscape.net>
---
 CMakeLists.txt | 4 ++++
 configure.ac   | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 992b0cf572..bafcd59750 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -494,6 +494,10 @@ else()
 		# No longer supported by El Capitan clang on C++
 		#
 		-fno-delete-null-pointer-checks
+
+		# Works only with GCC 7
+		-Wduplicated-branches
+
 	)
 
 	set(C_EXTRA_WARN_FLAGS
diff --git a/configure.ac b/configure.ac
index 166c507bbd..5d8673530e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -748,6 +748,10 @@ AC_ARG_ENABLE(extra-compiler-warnings,
 		# never enable this one with -Werror.
 		#
 		AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wbad-function-cast, C)
+
+		# Works only with GCC 7
+		AC_WIRESHARK_COMPILER_FLAGS_CHECK(-Wduplicated-branches)
+
 	fi
 ])