From: Florian Weimer <fweimer@redhat.com>
To: Joseph Myers <joseph@codesourcery.com>, Zack Weinberg <zackw@panix.com>
Cc: libc-alpha@sourceware.org, adhemerval.zanella@linaro.org,
Wilco.Dijkstra@arm.com, carlos@redhat.com, schwab@suse.de
Subject: Re: [PATCH 05/10] Remove __need macros from errno.h (__need_Emath, __need_error_t).
Date: Wed, 10 May 2017 07:31:00 -0000 [thread overview]
Message-ID: <9d81a666-ecd7-578e-3475-9f3922619980@redhat.com> (raw)
In-Reply-To: <alpine.DEB.2.20.1705092136220.28688@digraph.polyomino.org.uk>
On 05/09/2017 11:38 PM, Joseph Myers wrote:
> On Tue, 9 May 2017, Zack Weinberg wrote:
>
>> diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
>> index 74f9a49b05..075c996f28 100644
>> --- a/misc/sys/cdefs.h
>> +++ b/misc/sys/cdefs.h
>> @@ -326,6 +326,13 @@
>> # define __attribute_artificial__ /* Ignore */
>> #endif
>>
>> +/* Force use of the initial-exec TLS model. */
>> +#if __GNUC_PREREQ (3,3)
>> +# define __attribute_tls_model_ie__ __attribute__ ((tls_model ("initial-exec")))
>
> This is not namespace-clean for an installed header (needs to be
> __tls_model__).
The larger problem is that we need to error out if __GLIBC_USE
(TLS_ERRNO) and the compiler does not support the initial-exec TLS model
because it cannot produce the required ABI for the errno symbol.
In my opinion, we could just decide that the NaCl port, if resurrected,
needs to implement __errno_location like the other ports. Then you
could drop the __GLIBC_USE (TLS_ERRNO) logic entirely, and you don't
need __attribute_tls_model_ie__, either.
Thanks,
Florian
next prev parent reply other threads:[~2017-05-10 7:31 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-09 15:41 [PATCH 00/10] All of my not-yet-reviewed patches Zack Weinberg
2017-05-09 15:41 ` [PATCH 07/10] Remove __need_IOV_MAX and __need_FOPEN_MAX Zack Weinberg
2017-05-09 15:41 ` [PATCH 04/10] Convert signal.h from __need macros to bits/types/ headers Zack Weinberg
2017-05-09 21:36 ` Joseph Myers
2017-05-17 17:41 ` Joseph Myers
2017-05-20 21:03 ` Zack Weinberg
2017-05-09 15:41 ` [PATCH 08/10] Don't install libio.h or _G_config.h Zack Weinberg
2017-05-09 15:41 ` [PATCH 01/10] Remove _IO_MTSAFE_IO from public headers Zack Weinberg
2017-05-09 21:11 ` Joseph Myers
2017-05-09 15:41 ` [PATCH 03/10] The bits/types/*.h treatment for stdio and wchar Zack Weinberg
2017-05-09 21:34 ` Joseph Myers
2017-05-10 11:52 ` Zack Weinberg
2017-05-20 21:05 ` Zack Weinberg
2017-05-22 14:56 ` Joseph Myers
2017-05-09 15:41 ` [PATCH 02/10] Suppress internal declarations for most of the testsuite Zack Weinberg
2017-05-09 21:28 ` Joseph Myers
2017-05-10 11:56 ` Zack Weinberg
2017-05-12 15:40 ` H.J. Lu
2017-05-12 16:16 ` Zack Weinberg
2017-05-12 16:26 ` H.J. Lu
2017-05-15 14:18 ` [PATCH] Move tst-mutex*8* to tests-internal Tulio Magno Quites Machado Filho
2017-05-20 13:06 ` Zack Weinberg
2017-05-22 14:21 ` Stefan Liebler
2017-05-25 17:55 ` Tulio Magno Quites Machado Filho
2017-05-09 15:41 ` [PATCH 09/10] Remove bits/string2.h Zack Weinberg
2017-05-09 15:56 ` [PATCH 05/10] Remove __need macros from errno.h (__need_Emath, __need_error_t) Zack Weinberg
2017-05-09 21:38 ` Joseph Myers
2017-05-10 7:31 ` Florian Weimer [this message]
2017-05-10 11:49 ` Joseph Myers
2017-05-10 12:03 ` Florian Weimer
2017-05-11 12:15 ` Zack Weinberg
2017-05-11 14:30 ` Joseph Myers
2017-05-11 14:46 ` Zack Weinberg
2017-05-11 14:53 ` Florian Weimer
2017-05-11 14:48 ` Florian Weimer
2017-05-11 15:26 ` Joseph Myers
2017-05-11 15:42 ` Andreas Schwab
2017-05-11 16:10 ` Joseph Myers
2017-05-11 17:20 ` Andreas Schwab
2017-05-11 16:19 ` Florian Weimer
2017-05-11 17:25 ` Andreas Schwab
2017-05-12 6:23 ` Florian Weimer
2017-05-15 8:11 ` Andreas Schwab
2017-05-15 8:13 ` Florian Weimer
2017-05-15 8:24 ` Andreas Schwab
2017-05-15 9:08 ` Florian Weimer
2017-05-09 15:56 ` [PATCH 06/10] Remove __need_list_t and __need_res_state Zack Weinberg
2017-05-10 7:37 ` Florian Weimer
2017-05-20 19:37 ` Zack Weinberg
2017-05-09 15:56 ` [PATCH 10/10] Remove bits/string.h Zack Weinberg
2017-05-11 0:12 ` [PATCH 00/10] All of my not-yet-reviewed patches Joseph Myers
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