From 00268fc2ad10020db17842da5f61e28397cda75d Mon Sep 17 00:00:00 2001
From: Nathaniel Filardo <nwf20@cl.cam.ac.uk>
Date: Thu, 25 Jul 2019 20:06:03 +0100
Subject: [PATCH] -Wundef

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8ad4ecd..bdc15e6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,7 +23,7 @@ macro(warnings_high)
     if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
       add_compile_options(-Wsign-conversion)
     endif ()
-    add_compile_options(-Wall -Wextra -Werror)
+    add_compile_options(-Wall -Wextra -Werror -Wundef)
   endif()
 endmacro()