From: Stefan Weil <weil@mail.berlios.de>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Blue Swirl <blauwirbel@gmail.com>,
QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH 1/7] Add new macro QEMU_PACKED for packed C structures
Date: Tue, 30 Aug 2011 22:17:21 +0200 [thread overview]
Message-ID: <4E5D4551.8070906@mail.berlios.de> (raw)
In-Reply-To: <4E5D2BFC.2090401@redhat.com>
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Am 30.08.2011 20:29, schrieb Paolo Bonzini:
> On 08/30/2011 07:57 PM, Blue Swirl wrote:
>>> >
>>> > +#if defined(_WIN32)
>>> > +# define QEMU_PACKED __attribute__((gcc_struct, packed))
>> Maybe we could also use gcc_struct also for non-win32?
>>
>>> > +#else
>>> > +# define QEMU_PACKED __attribute__((packed))
>>> > +#endif
>
> Indeed.
>
> Paolo
>
No. Extract from gcc documentation:
"Two attributes are currently defined for i386 configurations:
|ms_struct| and |gcc_struct"
For non i386 configuration, these configurations are undefined:
mipsel-linux-gnu-gcc -c -Wall test.c
test.c:3: warning: ‘gcc_struct’ attribute directive ignored
Therefore, we cannot use gcc_struct for most supported hosts.
Linux i386 or x86_64 would support it, but they don't need it...
We need one #if ... #else ... #endif to avoid 250 of them :-)
Stefan
|
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next prev parent reply other threads:[~2011-08-30 20:17 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-28 20:43 [Qemu-devel] [PATCH 0/7] Fix packing for MinGW with -mms-bitfields Stefan Weil
2011-08-28 20:43 ` [Qemu-devel] [PATCH 1/7] Add new macro QEMU_PACKED for packed C structures Stefan Weil
2011-08-28 20:47 ` Andreas Färber
2011-08-29 5:12 ` Stefan Weil
2011-08-30 17:57 ` Blue Swirl
2011-08-30 18:29 ` Paolo Bonzini
2011-08-30 20:17 ` Stefan Weil [this message]
2011-08-28 20:43 ` [Qemu-devel] [PATCH 2/7] block/vvfat: Fix packing for w32 Stefan Weil
2011-08-29 8:09 ` Kevin Wolf
2011-08-28 20:43 ` [Qemu-devel] [PATCH 3/7] acpi: " Stefan Weil
2011-08-28 20:43 ` [Qemu-devel] [PATCH 4/7] hpet: " Stefan Weil
2011-08-28 20:43 ` [Qemu-devel] [PATCH 5/7] usb: " Stefan Weil
2011-08-28 20:43 ` [Qemu-devel] [PATCH 6/7] virtio: " Stefan Weil
2011-08-28 20:43 ` [Qemu-devel] [PATCH 7/7] slirp: " Stefan Weil
2011-08-29 10:12 ` Jan Kiszka
2011-08-29 18:22 ` Stefan Weil
2011-08-29 21:15 ` Jan Kiszka
2011-08-28 21:43 ` [Qemu-devel] [PATCH 0/7] Fix packing for MinGW with -mms-bitfields Blue Swirl
2011-08-29 5:01 ` Stefan Weil
2011-08-29 7:19 ` Gerd Hoffmann
2011-08-29 8:34 ` TeLeMan
2011-08-29 9:39 ` Alexander Graf
2011-08-29 19:55 ` Stefan Weil
2011-08-30 7:44 ` Kevin Wolf
2011-08-30 17:25 ` Stefan Weil
2011-08-30 18:29 ` Alexander Graf
2011-08-30 19:57 ` Blue Swirl
2011-08-31 7:40 ` Kevin Wolf
2011-08-31 10:37 ` [Qemu-devel] [PATCH 0/2] Fix packing for MinGW with new macro QEMU_PACKED Stefan Weil
2011-09-03 21:12 ` Blue Swirl
2011-08-31 10:38 ` [Qemu-devel] [PATCH 1/2] Add new macro QEMU_PACKED for packed C structures Stefan Weil
2011-08-31 10:38 ` [Qemu-devel] [PATCH 2/2] Use new macro QEMU_PACKED for packed structures Stefan Weil
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