Check for CMake policies before they are used to ensure compatibility with CMake 2.8.12. Set CMake 2.8.12 as minimum requirement.

CMakeLists.txt

@@ -17,10 +17,14 @@ if( EXISTS "${CMAKE_SOURCE_DIR}/include/exiv2/exv_conf.h"  )
 endif()
 ##
 
-CMAKE_MINIMUM_REQUIRED( VERSION 2.8 )
+CMAKE_MINIMUM_REQUIRED( VERSION 2.8.12 )
 PROJECT( exiv2 )
 
-cmake_policy(SET CMP0042 NEW) # enable MACOSX_RPATH support
+if( POLICY CMP0042 )
+    cmake_policy(SET CMP0042 NEW) # enable MACOSX_RPATH support
+else()
+    SET( CMAKE_MACOSX_RPATH 1 )
+endif()
 SET(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
 
 

xmpsdk/CMakeLists.txt

@@ -9,7 +9,9 @@
 include(../CMake_msvc.txt)
 msvc_runtime_configure(${EXIV2_ENABLE_SHARED})
 
-cmake_policy(SET CMP0026 OLD) # Something to do with location
+if( POLICY CMP0026 )
+    cmake_policy(SET CMP0026 OLD) # Something to do with location
+endif()
 
 FOREACH(_currentfile ${XMPSRC})
     # http://www.openguru.com/2009/04/cmake-detecting-platformoperating.html