From: Zack Weinberg <zackw@panix.com>
To: GNU C Library <libc-alpha@sourceware.org>
Cc: Joseph Myers <joseph@codesourcery.com>
Subject: Re: [PATCH 03/10] The bits/types/*.h treatment for stdio and wchar.
Date: Sat, 20 May 2017 21:05:00 -0000 [thread overview]
Message-ID: <d04dc6a2-5544-0929-0c50-b5bb89fdaf22@panix.com> (raw)
In-Reply-To: <CAKCAbMhOM1Z9XAAV33ZuYgPB5T477SVxtMvDYxFusys-3N6XBw@mail.gmail.com>
On 05/10/2017 07:52 AM, Zack Weinberg wrote:
> On Tue, May 9, 2017 at 5:34 PM, Joseph Myers <joseph@codesourcery.com> wrote:
>>> +# ifdef __WINT_TYPE__
>>> + __WINT_TYPE__ __wch;
>>> +# else
>>> + wint_t __wch;
>>> +# endif
>>
>> I'm concerned about the possible dependency this introduces on wint_t
>> having already been defined, if bits/types/__mbstate_t.h is included with
>> a compiler that does not define __WINT_TYPE__ (e.g. GCC 2.95 or earlier).
>>
>> Previously, wchar.h would attempt to get a wint_t definition under
>> conditions that included !defined __WINT_TYPE__ - that is, it might
>> spuriously define wint_t when only asked to define __mbstate_t, given such
>> a compiler, but wouldn't define __mbstate_t in terms of an undefined type
>> wint_t.
>>
>> Maybe you need a header that ensures __WINT_TYPE__ is always defined,
>> separate from bits/types/wint_t.h?
>
> Ugh, you're right. I don't know how I managed to miss that. Will fix.
What I've decided to do about this is duplicate the
#ifndef __WINT_TYPE__
# define __WINT_TYPE__ unsigned int
#endif
in __mbstate_t.h and then use __WINT_TYPE__ unconditionally in the
structure definition. Sound good?
zw
next prev parent reply other threads:[~2017-05-20 21:05 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 09/10] Remove bits/string2.h 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 08/10] Don't install libio.h or _G_config.h 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 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 [this message]
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 15:56 ` [PATCH 10/10] Remove bits/string.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
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
2017-05-11 0:12 ` [PATCH 00/10] All of my not-yet-reviewed patches Joseph Myers
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