cmake: ensure consumers do not overwrite the required policy

diff --git a/glog-config.cmake.in b/glog-config.cmake.in
index e3c44ae..bf06a62 100644 (file)
--- a/glog-config.cmake.in
+++ b/glog-config.cmake.in
@@ -1,3 +1,6 @@
+cmake_policy (PUSH)
+cmake_policy (VERSION 3.0)
+
 @PACKAGE_INIT@
 
 include (CMakeFindDependencyMacro)
@@ -5,3 +8,5 @@ include (CMakeFindDependencyMacro)
 @gflags_DEPENDENCY@
 
 include ("${CMAKE_CURRENT_LIST_DIR}/glog-targets.cmake")
+
+cmake_policy (POP)