Installing Libraries on 64 bit systems

Hi,

It's been discussed a bit before about where libraries exist on 
different systems. Some unixes have them in a lib64 directory and some 
have them in the lib directory (and 32 bit libs in lib32). Right now, as 
far as I can tell, it does not give you a choice when you're building 
player, the libraries have to go into lib64.

The issue for me is, that lib64 is not in the system's library search 
path, so when I compile player, and link against player, when I try to 
run any libraries linked against player's I get a library not found 
error. My solution to this was to just expose the 
PLAYER_LIBRARY_INSTALL_DIR CMake variable so that you can change lib64 
to lib if you so desire.

Is there a better way to do this, or is this the way it should be done. 
I've attached what I've done as a patch (it's quite simple) if anyone is 
interested.

I apologize if this specific topic has been discussed before, I searched 
for a bit and couldn't find anything, only the discussion about multilib 
linux (Player SVN trunk: Problem with playerc++ on multilib Linux/x86_64)

Thanks,
John Hoare

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Index: cmake/internal/SetupDirectories.cmake
===================================================================
--- cmake/internal/SetupDirectories.cmake	(revision 8808)
+++ cmake/internal/SetupDirectories.cmake	(working copy)
@@ -12,10 +12,10 @@
 SET (PLAYER_INCLUDE_INSTALL_DIR "include/${projectNameLower}-${PLAYER_MAJOR_VERSION}.${PLAYER_MINOR_VERSION}")
 
 IF (PLAYER_PROC_64BIT)
-    SET (PLAYER_LIBRARY_INSTALL_DIR "lib64")
+    SET (PLAYER_LIBRARY_INSTALL_DIR "lib64" CACHE STRING "Player library install folder")
     MESSAGE (STATUS "Player libraries will be in lib64")
 ELSE (PLAYER_PROC_64BIT)
-    SET (PLAYER_LIBRARY_INSTALL_DIR "lib")
+    SET (PLAYER_LIBRARY_INSTALL_DIR "lib" CACHE STRING "Player library install folder")
     MESSAGE (STATUS "Player libraries will be in lib")
 ENDIF (PLAYER_PROC_64BIT)