From 6d471636ee3bcdea7ac0c083b73f050eb720b394 Mon Sep 17 00:00:00 2001
From: James McCoy <jamessan@jamessan.com>
Date: Thu, 21 Sep 2017 08:09:09 -0400
Subject: cmake: Check if the compiler understands -Wno-array-bounds

Closes #7297
---
 CMakeLists.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4e82868337..df29774d45 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -254,7 +254,10 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
   if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.8.5")
     # Array-bounds testing is broken in some GCC versions before 4.8.5.
     # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56273
-    add_definitions(-Wno-array-bounds)
+    check_c_compiler_flag(-Wno-array-bounds HAS_NO_ARRAY_BOUNDS_FLAG)
+    if(HAS_NO_ARRAY_BOUNDS_FLAG)
+      add_definitions(-Wno-array-bounds)
+    endif()
   endif()
 endif()
 
-- 
cgit