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From: "stsp at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/53760] New: attribute packed doesn't pack inner structs
Date: Sun, 24 Jun 2012 14:19:00 -0000 [thread overview]
Message-ID: <bug-53760-4@http.gcc.gnu.org/bugzilla/> (raw)
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53760
Bug #: 53760
Summary: attribute packed doesn't pack inner structs
Classification: Unclassified
Product: gcc
Version: 4.6.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: stsp@users.sourceforge.net
The following code:
---
#include <stdio.h>
struct A {
char a:1;
struct {
char a:1;
} __attribute__((packed)) s1;
struct {
char a:1;
} __attribute__((packed)) s2;
struct {
char a:1;
} __attribute__((packed)) s3;
} __attribute__((packed));
int main()
{
printf("%lu\n", sizeof(struct A));
return 0;
}
---
prints '4' instead of '1'.
Every bitfield seems to be occupying an entire byte.
next reply other threads:[~2012-06-24 14:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-24 14:19 stsp at users dot sourceforge.net [this message]
2012-06-24 17:59 ` [Bug c/53760] " pinskia at gcc dot gnu.org
2012-06-24 18:09 ` stsp at users dot sourceforge.net
2012-06-24 18:13 ` pinskia at gcc dot gnu.org
2012-06-24 18:20 ` stsp at users dot sourceforge.net
2012-06-25 6:52 ` jakub at gcc dot gnu.org
2012-06-25 8:12 ` rguenth at gcc dot gnu.org
2012-06-25 10:07 ` ebotcazou at gcc dot gnu.org
2012-06-25 10:30 ` stsp at users dot sourceforge.net
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