[PATCH v2 1/2] Add framework for tunables

[Paul E. Murphy]

On 01/16/2016 12:55 PM, Siddhesh Poyarekar wrote:
> The tunables framework allows us to uniformly manage and expose global
> variables inside glibc as switches to users.  tunables/README has
> instructions for glibc developers to add new tunables.
> 
> Tunables support can be enabled by passing the --enable-tunables
> configure flag to the configure script.  This patch only adds a
> framework and does not pose any limitations on how tunable values are
> read from the user.  It also adds environment variables used in malloc
> behaviour tweaking to the tunables framework as a PoC of the
> compatibility interface.

This looks like a good start to me. Tested on ppc64le with the second patch.