Index: lib/antlr4-cpp-runtime/CMakeLists.txt
--- lib/antlr4-cpp-runtime/CMakeLists.txt.orig
+++ lib/antlr4-cpp-runtime/CMakeLists.txt
@@ -28,16 +28,8 @@ project(LIBANTLR4)
 if(CMAKE_VERSION VERSION_EQUAL "3.0.0" OR
    CMAKE_VERSION VERSION_GREATER "3.0.0")
   CMAKE_POLICY(SET CMP0026 NEW)
-  CMAKE_POLICY(SET CMP0054 OLD)
-  CMAKE_POLICY(SET CMP0045 OLD)
-  CMAKE_POLICY(SET CMP0042 OLD)
 endif()
 
-if(CMAKE_VERSION VERSION_EQUAL "3.3.0" OR
-   CMAKE_VERSION VERSION_GREATER "3.3.0")
-  CMAKE_POLICY(SET CMP0059 OLD)
-  CMAKE_POLICY(SET CMP0054 OLD)
-endif()
 
 if(CMAKE_SYSTEM_NAME MATCHES "Linux")
   #find_package(PkgConfig REQUIRED)
