Re: [patch v2] aligned_alloc: conform to C17

[DJ Delorie <dj@redhat.com>]

Florian Weimer <fweimer@redhat.com> writes:
> Why do we need to export the __libc_aligned_alloc symbol?  That doesn't
> seem to be right.  We should simply change the behavior of the existing
> aligned_alloc symbol.

I did it only because memalign has a __libc_memalign symbol.  The old
symbol used to be a weak alias for __libc_memalign, so to change it, we
need a separate function - which would thus be __libc_aligned_alloc, so
that aligned_alloc() can continue to be a weak function.

> If you do not want to change behavior for existing binaries (why?),

I'm going on the premise that aligned_alloc() is new to C11 and was
always documented to fail in the way I'm making it now fail (although
there are other "documented to fail" cases we're not implementing).
Thus there is no need to support a pre-C11 functionality.