how to override __errno_location() ?

[Florian Weimer]

* William Tambe via Libc-help:

> To override the function __errno_location(), is it enough to create a
> file named errno-loc.c under an architecture specific sysdeps folder ?

You may also have to change include/errno.h to avoid direct references
to errno@@GLIBC_PRIVATE from within glibc itself.