Re: [patch] Remove sysdeps/ieee754/ldbl-128/bits/huge_vall.h

[Roland McGrath <roland at hack dot frob dot com>]

> The only difference between the two is some support that the
> ieee754 one has for old GCC's that we don't support anymore so I would
> like to remove sysdeps/ieee754/ldbl-128/bits/huge_vall.h and leave just
> bits/huge_vall.h

This statement includes an ambiguity.  There are two kinds of "GCC's we
support" (or don't any more).  There is a pretty late minimum GCC version
supported for building libc.  There is a far wider range of GCC versions
supported for building applications against libc and its headers.  As this
is a public header, it's the latter set that matters here.

> Joseph Myers gave a fuller description of why this file isn't needed in
> glibc-ports (http://sourceware.org/ml/libc-ports/2012-09/msg00088.html)
> and also mentions that the arch specific versions (x86, m68k, ia64, and sparc)
> are probably also unneeded but this patch just removes the one in
> sysdeps/ieee754/ldbl-128/bits/huge_vall.h.

Joseph's explanation in that libc-ports message clarifies that there is no
(GNU) compiler that might be used to build applications against any libc
configuration using ldbl-128/ that would perceive the difference between
the ldbl-128/ and generic versions of bits/huge_vall.h.  I'm not sure we've
made any claims about non-GNU compilers, but we don't really care.

So this change is OK by me.


Thanks,
Roland