CMake: use the old MACOSX_RPATH behavior (for now), silence the warning.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ea03932..37cf7cd 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,17 @@ endif()
cmake_minimum_required(VERSION 2.8)
project(SDL2 C)
+
+# !!! FIXME: this should probably do "MACOSX_RPATH ON" as a target property
+# !!! FIXME: for the SDL2 shared library (so you get an
+# !!! FIXME: install_name ("soname") of "@rpath/libSDL-whatever.dylib"
+# !!! FIXME: instead of "/usr/local/lib/libSDL-whatever.dylib"), but I'm
+# !!! FIXME: punting for now and leaving the existing behavior. Until this
+# !!! FIXME: properly resolved, this line silences a warning in CMake 3.0+.
+# !!! FIXME: remove it and this comment entirely once the problem is
+# !!! FIXME: properly resolved.
+cmake_policy(SET CMP0042 OLD)
+
include(CheckFunctionExists)
include(CheckLibraryExists)
include(CheckIncludeFiles)