From b551beb6facee72d1c1af455a9e4e8ecc7be959f Mon Sep 17 00:00:00 2001
From: Jean-Christophe Fillion-Robin <jchris.fillionr@kitware.com>
Date: Tue, 7 Nov 2017 09:50:02 -0500
Subject: FetchContent: Support use of the module before "project()" command

Co-authored-by: Craig Scott <craig.scott@crascit.com>
Co-authored-by: Brad King <brad.king@kitware.com>
---
 Modules/FetchContent.cmake | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Modules/FetchContent.cmake b/Modules/FetchContent.cmake
index 132354f..98cdf6c 100644
--- a/Modules/FetchContent.cmake
+++ b/Modules/FetchContent.cmake
@@ -754,7 +754,9 @@ function(__FetchContent_directPopulate contentName)
       list(APPEND generatorOpts "-T${CMAKE_GENERATOR_TOOLSET}")
     endif()
 
-    list(APPEND generatorOpts "-DCMAKE_MAKE_PROGRAM:FILE=${CMAKE_MAKE_PROGRAM}")
+    if(CMAKE_MAKE_PROGRAM)
+      list(APPEND generatorOpts "-DCMAKE_MAKE_PROGRAM:FILEPATH=${CMAKE_MAKE_PROGRAM}")
+    endif()
 
   else()
     # Likely we've been invoked via CMake's script mode where no
-- 
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