From: Florian Weimer <fweimer@redhat.com>
To: "Gabriel F. T. Gomes" <gabrielftg@linux.ibm.com>
Cc: GNU C Library <libc-alpha@sourceware.org>
Subject: Re: Legacy _IO_* symbols and Flaot128 transition
Date: Fri, 29 Jun 2018 15:29:00 -0000 [thread overview]
Message-ID: <1d310ac2-64f8-21d7-3bc5-2ddfa871f348@redhat.com> (raw)
In-Reply-To: <20180629122600.1062b3bc@tereshkova>
On 06/29/2018 05:26 PM, Gabriel F. T. Gomes wrote:
> On Fri, 29 Jun 2018, Florian Weimer wrote:
>
>> libio exports a bunch of symbols for historic reasons:
>>
>> _IO_fprintf
>> _IO_printf
>> _IO_sprintf
>> _IO_sscanf
>> _IO_vfprintf
>> _IO_vfscanf
>> _IO_vsprintf
>>
>> These aren't compat symbols yet, but will not be in installed headers
>> for glibc 2.28. Zack's cleanup patches only turns _IO_vfscanf into a
>> compat symbol (in âAdd __vfscanf_internal and __vfwscanf_internal with
>> flags arguments.â).
>>
>> I think we should turn all of them into compat symbols and drop their
>> compatibility wrappers from nldbl_nonshared.a, and avoid adding
>> binary128 compatibility wrappers for them.
>
> Should they be turned into compat symbols *because* they won't be
> installed headers (and we don't want new user code linking against them)?
> Or is there something else to it?
No, it's just a cleanup, and to clarify what's necessary for future work.
I also want to add some minimal test for libnldbl_nonshared.a, and
reducing its size helps with that. (I'm aware that on ppc64, the
current toolchain doesn't support long double as double anymore, but I
can just lie to the compiler and use double instead, I guess.)
> As for binary128 compatibility wrappers for them, I agree (I haven't
> created these on my branch, so this should already be in sync with your
> suggestions).
Good to know.
Florian
next prev parent reply other threads:[~2018-06-29 15:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-29 14:49 Florian Weimer
2018-06-29 15:26 ` Gabriel F. T. Gomes
2018-06-29 15:29 ` Florian Weimer [this message]
2018-06-29 17:15 ` Joseph Myers
2018-07-02 7:22 ` Florian Weimer
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