From 12517c73039afa5632b475a447e277a0ec73fbd5 Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Mon, 30 May 2016 12:05:08 -0400
Subject: [PATCH] Add -Wduplicated-cond on GCC 6

---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index 4878d2ba7e..d9149e26ec 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1777,6 +1777,7 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  if test "x$have_gcc6" = "xyes"; then
      CFLAGS="$CFLAGS -Wignored-attributes -Wshift-negative-value -Wshift-overflow=2"
      CFLAGS="$CFLAGS -Wnull-dereference"
+     CFLAGS="$CFLAGS -Wduplicated-cond"
   fi
 
   if test "x$have_shorten64_flag" = "xyes"; then