From: Dmitry Antipov <dmantipov@yandex.ru>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: The --with-wide-int build and Lisp_Sub_Char_Table assertion
Date: Mon, 12 Jan 2015 21:32:32 +0300 [thread overview]
Message-ID: <54B41340.7080605@yandex.ru> (raw)
In-Reply-To: <83siff52r8.fsf@gnu.org>
On 01/12/2015 08:26 PM, Eli Zaretskii wrote:
> This is exactly the flaw: the assumption that if the size of 'struct
> vectorlike_header' is 4, the offset of the next struct member is also
> 4. In reality, a compiler can add padding, and evidently here it did,
> probably to get that member aligned an a 8-byte boundary.
For MinGW/32, 1) what happens if you use -m[no-]ms-bitfields? (See
https://gcc.gnu.org/onlinedocs/gcc/Variable-Attributes.html,
section 6.38.5 i386 Variable Attributes). Or 2) what about using
__attribute__((packed))? Stefan doesn't like it for an obvious reasons,
but may be just for this particular case...
Dmitry
next prev parent reply other threads:[~2015-01-12 18:32 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-12 16:29 The --with-wide-int build and Lisp_Sub_Char_Table assertion Eli Zaretskii
2015-01-12 17:03 ` Dmitry Antipov
2015-01-12 17:26 ` Eli Zaretskii
2015-01-12 18:32 ` Dmitry Antipov [this message]
2015-01-12 18:43 ` Eli Zaretskii
2015-01-12 17:58 ` Andreas Schwab
2015-01-12 19:30 ` Paul Eggert
2015-01-13 16:14 ` Eli Zaretskii
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