First of all you need to build an updated toolchain suitable for your BSP.
As of 2016-02-16, the most recent versions of the OSELAS toolchains are:

Move to your BSP root folder and execute

ptxdist platformconfig

Navigate to

architecture -->  toolchain -->

and modify the following options

(OSELAS.Toolchain-YYYY.MM.P) check for specific toolchain vendor
(MAJOR.MINOR[.PATCH]) check for specific glibc version

with the version information from the table above. Exit PTXdist and make sure your changes are saved.

Now configure your BSP to use the new toolchain by executing

ptxdist toolchain <path to the new toolchain>

To rebuild your BSP execute

ptxdist clean
ptxdist go --git