From e8dede494e5b421968122d7589a7f30d1bc2b1ad Mon Sep 17 00:00:00 2001
From: Laurent Rineau <laurent.rineau@cgal.org>
Date: Wed, 5 Oct 2016 10:07:01 +0200
Subject: [PATCH] Avoir a CMake error

When the list `CMAKE_CXX_COMPILE_FEATURES` is empty, there was a syntax
error.
```
CMake Error at /mnt/testsuite/cmake/modules/CGAL_CreateSingleSourceCGALProgram.cmake:27 (list):
  list sub-command REMOVE_ITEM requires two or more arguments.
Call Stack (most recent call first):
  CMakeLists.txt:75 (create_single_source_cgal_program)

```
---
 .../cmake/modules/CGAL_CreateSingleSourceCGALProgram.cmake    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Installation/cmake/modules/CGAL_CreateSingleSourceCGALProgram.cmake b/Installation/cmake/modules/CGAL_CreateSingleSourceCGALProgram.cmake
index 67d29c1cea9..dfd08721143 100644
--- a/Installation/cmake/modules/CGAL_CreateSingleSourceCGALProgram.cmake
+++ b/Installation/cmake/modules/CGAL_CreateSingleSourceCGALProgram.cmake
@@ -24,7 +24,9 @@ function(create_single_source_cgal_program firstfile )
     endif()
     if(CXX_FEATURES)
       set(MISSING_CXX_FEATURES ${CXX_FEATURES})
-      list(REMOVE_ITEM MISSING_CXX_FEATURES ${CMAKE_CXX_COMPILE_FEATURES})
+      if(CMAKE_CXX_COMPILE_FEATURES)
+        list(REMOVE_ITEM MISSING_CXX_FEATURES ${CMAKE_CXX_COMPILE_FEATURES})
+      endif()
     endif()
     # Now MISSING_CXX_FEATURES is the set CXX_FEATURES minus CMAKE_CXX_COMPILE_FEATURES
     if(MISSING_CXX_FEATURES)