[Piglit] [PATCH v1] cmake: Use Policy CMP0072 as OLD by default.

[Sergii Romantsov]

If system has installed both GL libraries such as
Legacy and GLVND, cmake will dump warning:

"OpenGL_GL_PREFERENCE has not been set to "GLVND" or "LEGACY",
so for compatibility with CMake 3.10 and below the legacy GL
library will be used."

Added usage of Policy CMP0072 as OLD (that selects LEGACY-library
libGL.so by default).

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106857
Signed-off-by: Sergii Romantsov <sergii.romantsov at globallogic.com>
---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e56aafb..02bdc56 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,6 +15,10 @@ if (POLICY CMP0042)
 	cmake_policy (SET CMP0042 NEW)
 endif()
 
+if (POLICY CMP0072)
+        cmake_policy (SET CMP0072 OLD)
+endif()
+
 project (piglit)
 
 # Require MinGW
-- 
2.7.4