From bb94895d52bcc58fb23e1010c9e896b7064b7ca0 Mon Sep 17 00:00:00 2001
From: James McCoy <jamessan@jamessan.com>
Date: Sat, 1 Dec 2018 15:28:33 -0500
Subject: [PATCH] Unset CMAKE_REQUIRED_* after they're done being used

As of CMake 3.12, check_include_files() also link the check executable
against the libraries listed in CMAKE_REQUIRED_LIBRARIES.  Therefore we
should unset the CMAKE_REQUIRED_* variables after each respective use to
avoid them unnecessarily bleeding into other checks.
---
 CMakeLists.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 26a6529fcd..527ab5eba4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -389,6 +389,7 @@ main(void)
   return MSGPACK_OBJECT_FLOAT32;
 }
 " MSGPACK_HAS_FLOAT32)
+unset(CMAKE_REQUIRED_LIBRARIES)
 if(MSGPACK_HAS_FLOAT32)
   add_definitions(-DNVIM_MSGPACK_HAS_FLOAT32)
 endif()
@@ -410,6 +411,8 @@ if(FEAT_TUI)
     return unibi_num_from_var(unibi_var_from_num(0));
   }
   " UNIBI_HAS_VAR_FROM)
+  unset(CMAKE_REQUIRED_INCLUDES)
+  unset(CMAKE_REQUIRED_LIBRARIES)
   if(UNIBI_HAS_VAR_FROM)
     add_definitions(-DNVIM_UNIBI_HAS_VAR_FROM)
   endif()