rework rpath patch

check against CMAKE_C_IMPLICIT_LINK_DIRECTORIES too
move CMAKE_INSTALL_RPATH_USE_LINK_PATH inside conditional

phonon-4.6.0-rpath.patch

@@ -1,15 +1,18 @@
 diff -up phonon-4.6.0/cmake/FindPhononInternal.cmake.rpath phonon-4.6.0/cmake/FindPhononInternal.cmake
 --- phonon-4.6.0/cmake/FindPhononInternal.cmake.rpath	2011-12-19 14:30:45.000000000 -0600
-+++ phonon-4.6.0/cmake/FindPhononInternal.cmake	2012-05-20 14:38:23.366555537 -0500
++++ phonon-4.6.0/cmake/FindPhononInternal.cmake	2012-05-20 15:56:48.031739000 -0500
-@@ -123,7 +123,11 @@ endif(APPLE)
+@@ -122,8 +122,13 @@ endif(APPLE)
+ # These two options below make it set the RPATH of the installed targets to all
  # RPATH directories outside the current CMAKE_BINARY_DIR and also the library 
  # install directory. Alex
++list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/${LIB_INSTALL_DIR}" _isSystemPlatformLibDir)
++list(FIND CMAKE_C_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/${LIB_INSTALL_DIR}" _isSystemCLibDir)
++list(FIND CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES "%{CMAKE_INSTALL_PREFIX}/${LIB_INSTALL_DIR}" _isSystemCxxLibDir)
++if("${_isSystemPlatformLibDir}" STREQUAL "-1" AND "${_isSystemCLibDir}" STREQUAL "-1" AND "${_isSystemCxxLibDir}" STREQUAL "-1")
  set(CMAKE_INSTALL_RPATH_USE_LINK_PATH  TRUE)
-+list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${LIB_INSTALL_DIR}" _isSystemPlatformLibDir)
+-set(CMAKE_INSTALL_RPATH "${LIB_INSTALL_DIR}")
-+list(FIND CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES "${LIB_INSTALL_DIR}" _isSystemCxxLibDir)
++set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${LIB_INSTALL_DIR}")
-+if("${_isSystemPlatformLibDir}" STREQUAL "-1" AND "${_isSystemCxxLibDir}" STREQUAL "-1")
++endif("${_isSystemPlatformLibDir}" STREQUAL "-1" AND "${_isSystemCLibDir}" STREQUAL "-1" AND "${_isSystemCxxLibDir}" STREQUAL "-1")
- set(CMAKE_INSTALL_RPATH "${LIB_INSTALL_DIR}")
-+endif("${_isSystemPlatformLibDir}" STREQUAL "-1" AND "${_isSystemCxxLibDir}" STREQUAL "-1")
  
  
  # Uninstall Target