On Nov 07, 2013, at 03:40 PM, jan matejek wrote:

>To reiterate, our current solution is to introduce "sys.lib" (and "sys.arch",
>but that is never used anymore) that is either "lib" or "lib64", and use this
>in place of the string "lib" wherever appropriate. We find the value for
>sys.lib through configure magic.

PEP 421 added sys.implementation, which contains provisions for
implementation-specific additions.  So a better place to put these
non-standard values is sys.implementation._lib and sys.implementation._arch,
either instead of or in addition to sysconfig variables.