[PATCH] nsswitch: Add group merging support

[Florian Weimer]

On 12/16/2015 04:11 PM, Stephen Gallagher wrote:
> 	* nscd/Makefile: Add vpath to find grp-merge.c
> 	(nscd-modules): Add grp-merge.

Why is it necessary to compile grp-merge.c twice?

If you can use a single copy, you need to export it as GLIBC_PRIVATE.
Commit 8f5e8b01a1da2a207228f2072c934fa5918554b8 is a recent example
which shows how to do this (basically, edit the Versions file).  The
res_init_fp patch I posted has another example:

  https://sourceware.org/ml/libc-alpha/2016-02/msg00376.html

Thanks,
Florian