$NetBSD$

Set the policy CMP0012 so that INSTALL_FHS works as intended,
and use the recommended command for adding definitions.

--- CMakeLists.txt.orig	2020-02-08 14:45:34.000000000 +0000
+++ CMakeLists.txt
@@ -2,6 +2,8 @@ cmake_minimum_required(VERSION 2.6)
 
 project(FreeGish C)
 
+cmake_policy(SET CMP0012 NEW)
+
 set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake-extras/;${CMAKE_MODULE_PATH}")
 
 option(INSTALL_FHS "Install into Linux FHS" OFF)
@@ -44,7 +46,7 @@ if(NOT DATA_DIR)
 endif(NOT DATA_DIR)
 
 if(${INSTALL_FHS})
-    ADD_DEFINITIONS(-DDATAPATH="${DATA_DIR}")
+    ADD_COMPILE_DEFINITIONS(DATAPATH="${DATA_DIR}")
 endif(${INSTALL_FHS})