From cb767c7705affe224febf6c2792f63aa3e4e09ff Mon Sep 17 00:00:00 2001
From: Ryan Pavlik <ryan.pavlik@collabora.com>
Date: Thu, 3 Sep 2020 11:25:54 -0500
Subject: [PATCH] cmake: Fix FindOpenGLES

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

diff --git a/cmake/FindOpenGLES.cmake b/cmake/FindOpenGLES.cmake
index 38ed43231..fc8aeb56c 100644
--- a/cmake/FindOpenGLES.cmake
+++ b/cmake/FindOpenGLES.cmake
@@ -173,7 +173,9 @@ foreach(_comp IN LISTS OpenGLES_FIND_COMPONENTS)
         set(OpenGLES_${_comp}_FOUND FALSE)
     endif()
 endforeach()
-list(REMOVE_DUPLICATES _gles_required_vars)
+if(_gles_required_vars)
+    list(REMOVE_DUPLICATES _gles_required_vars)
+endif()
 
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(