From 55a643e94a1b811390b7bf9161339744734b3491 Mon Sep 17 00:00:00 2001
From: Saleem Abdulrasool <compnerd@compnerd.org>
Date: Tue, 8 Mar 2016 18:56:00 +0000
Subject: [PATCH] cmake: include what you use

Add a missing include.  This is important in the case HandleLLVMOptions is
included prior to the missing CheckCXXSourceCompiles or CheckCXXCompilerFlag
which includes CheckCXXSourceCompiles.

llvm-svn: 262949
---
 cmake/modules/CheckCompilerVersion.cmake | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cmake/modules/CheckCompilerVersion.cmake b/cmake/modules/CheckCompilerVersion.cmake
index e72f24cf8f1..08900a4599e 100644
--- a/cmake/modules/CheckCompilerVersion.cmake
+++ b/cmake/modules/CheckCompilerVersion.cmake
@@ -1,6 +1,8 @@
 # Check if the host compiler is new enough. LLVM requires at least GCC 4.7,
 # MSVC 2013, or Clang 3.1.
 
+include(CheckCXXSourceCompiles)
+
 if(NOT DEFINED LLVM_COMPILER_CHECKED)
   set(LLVM_COMPILER_CHECKED ON)