From 405d43866dfab10219028098a95441f0721e4704 Mon Sep 17 00:00:00 2001
From: Carles Fernandez <carles.fernandez@gmail.com>
Date: Tue, 16 Jun 2020 13:07:13 +0200
Subject: [PATCH] Add missing CMake include

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

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6f674bd2d..1ccb2e9de 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -833,6 +833,7 @@ endif()
 # Detect availability of std::span
 ################################################################################
 unset(has_span CACHE)
+include(CheckCXXSourceCompiles)
 check_cxx_source_compiles("
     #include <span>
     int main()