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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/114955] marco DATA_ALIGNMENT may conflict with pragma pack
Date: Mon, 06 May 2024 06:44:37 +0000 [thread overview]
Message-ID: <bug-114955-4-mJlpXvoqAI@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-114955-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114955
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |INVALID
Status|WAITING |RESOLVED
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>We set pragma pack(1) hope the address of variable (also first member of struct) with struct A type align to 1.
But that is not what #pragma pack is documented doing.
You need to use an explicit align attribute (or _Align or alignas [which is the
portable way of doing it for C11 and C++11]).
next prev parent reply other threads:[~2024-05-06 6:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-06 3:35 [Bug c/114955] New: " hanwei62 at huawei dot com
2024-05-06 3:38 ` [Bug target/114955] " pinskia at gcc dot gnu.org
2024-05-06 3:58 ` pinskia at gcc dot gnu.org
2024-05-06 6:39 ` hanwei62 at huawei dot com
2024-05-06 6:44 ` pinskia at gcc dot gnu.org [this message]
2024-05-06 7:20 ` hanwei62 at huawei dot com
2024-05-06 7:26 ` pinskia at gcc dot gnu.org
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