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Re: Deprecate DBX/stabs?
- From: Richard Biener <richard dot guenther at gmail dot com>
- To: David Edelsohn <dje dot gcc at gmail dot com>
- Cc: Nathan Sidwell <nathan at acm dot org>, Jim Wilson <jim dot wilson at linaro dot org>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Jason Merrill <jason at redhat dot com>, Jim Wilson <wilson at tuliptree dot org>, Jan Hubicka <hubicka at ucw dot cz>, Mike Stump <mikestump at comcast dot net>, Iain Sandoe <iain at codesourcery dot com>, Nick Clifton <nickc at redhat dot com>, 10walls at gmail dot com
- Date: Tue, 25 Jul 2017 09:16:41 +0200
- Subject: Re: Deprecate DBX/stabs?
- Authentication-results: sourceware.org; auth=none
- References: <CAGWvnynDPj3vbYxR+Fv5cduCQd5JQNLsL2zu2frL+Ch67BwFuQ@mail.gmail.com>
On Fri, Jul 21, 2017 at 4:15 PM, David Edelsohn <dje.gcc@gmail.com> wrote:
>>>>>> Nathan Sidwell writes:
>
>> Let's at least deprecate it. I attach a patch to do so. With the
>> patch, you'll get a note about dbx being deprecated whenever you use
>> stabs debugging on a system that prefers stabs (thus both -g and -gstabs
>> will warn). On systems where stabs is not preferred, -gstabs will not
>> give you a warning. The patch survices an x86_64-linux bootstrap.
>
> Absolutely not.
>
> AIX still uses DBX as the primary debugging format. AIX supports
> DWARF but the AIX toolchain does not fully interoperate with DWARF
> generated by GCC.
>
> With the extensive use of DBX by AIX and regular patches from me to
> fix xcoff stabs debugging, omitting me from the cc list implies that
> you really haven't done your homework.
The proposal was to define DBX_DEBUG_OK on such targets so their
users do not get the deprecation warning.
The idea is to remove support for STABS from targets that have well
established DWARF support (like xyz-linux).
Of course I would like complete STABS deprecation more but I knew
that at least AIX stands in the way here ;)
Richard.
> Thanks, David