From: Paolo Bonzini <pbonzini@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: kwolf@redhat.com, Jes.Sorensen@redhat.com, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Re: [PATCH 10/14] Zero json struct with memset() instea of = {} to keep compiler happy.
Date: Mon, 30 Aug 2010 18:35:58 +0200 [thread overview]
Message-ID: <4C7BDDEE.8070706@redhat.com> (raw)
In-Reply-To: <4C7BDC84.9070906@codemonkey.ws>
On 08/30/2010 06:29 PM, Anthony Liguori wrote:
>> Arguably, an empty initializer should be special cased, but it
>> isn't.
>
> So the warning is for old style initializer lists? I disagree that
> it's a valid warning. First, {} is ambiguous as it can be an empty
> list of c99 initializers and an empty list of c89 initializers.
Yes, that's what I meant. {} should be special cased as an empty list
will rarely be a bug, even when C89 initializers are used.
> But even for c89 initializers, it's very common practice to omit
> initializers and rely on the defaulted value. For instance, { 0 } is
> quite pervasive as an idiom.
That's why the warning is only in -Wextra. Those are warnings that may
clash with someone's style conventions.
Paolo
next prev parent reply other threads:[~2010-08-30 16:36 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-30 15:35 [Qemu-devel] [PATCH 00/14] gcc extra warning fixes Jes.Sorensen
2010-08-30 15:35 ` [Qemu-devel] [PATCH 01/14] Remove unused argument for nbd_client() Jes.Sorensen
2010-08-30 15:35 ` [Qemu-devel] [PATCH 02/14] Respect return value from nbd_client() Jes.Sorensen
2010-08-30 15:35 ` [Qemu-devel] [PATCH 03/14] Fix repeated typo: was "end if list" instead of "end of list" Jes.Sorensen
2010-08-30 15:35 ` [Qemu-devel] [PATCH 04/14] Zero initialize timespec struct explicitly Jes.Sorensen
2010-08-30 15:43 ` [Qemu-devel] " Anthony Liguori
2010-08-30 15:55 ` Jes Sorensen
2010-08-30 17:04 ` malc
2010-08-30 16:56 ` malc
2010-08-30 17:38 ` Jes Sorensen
2010-08-30 17:41 ` Anthony Liguori
2010-08-30 17:43 ` malc
2010-08-30 15:35 ` [Qemu-devel] [PATCH 05/14] Remove unused argument for check_for_block_signature() Jes.Sorensen
2010-08-30 15:35 ` [Qemu-devel] [PATCH 06/14] Remove unused argument for encrypt_sectors() Jes.Sorensen
2010-08-30 15:35 ` [Qemu-devel] [PATCH 07/14] Remove unused argument for get_whole_cluster() Jes.Sorensen
2010-08-30 15:35 ` [Qemu-devel] [PATCH 08/14] Remove unused argument for qcow2_encrypt_sectors() Jes.Sorensen
2010-08-30 15:35 ` [Qemu-devel] [PATCH 09/14] Remove unused arguments for add_aio_request() and free_aio_req() Jes.Sorensen
2010-08-30 15:35 ` [Qemu-devel] [PATCH 10/14] Zero json struct with memset() instea of = {} to keep compiler happy Jes.Sorensen
2010-08-30 15:39 ` [Qemu-devel] " Anthony Liguori
2010-08-30 15:43 ` Jes Sorensen
2010-08-30 15:48 ` Anthony Liguori
2010-08-30 15:53 ` Jes Sorensen
2010-08-30 17:12 ` Avi Kivity
2010-08-30 16:55 ` Nathan Froyd
2010-08-30 18:00 ` Jes Sorensen
2010-08-30 17:06 ` malc
2010-08-30 19:32 ` Richard Henderson
2010-08-30 15:42 ` Paolo Bonzini
2010-08-30 16:15 ` Anthony Liguori
2010-08-30 16:18 ` Paolo Bonzini
2010-08-30 16:29 ` Anthony Liguori
2010-08-30 16:35 ` Paolo Bonzini [this message]
2010-08-30 18:05 ` Jes Sorensen
2010-08-30 15:35 ` [Qemu-devel] [PATCH 11/14] Remove unused function arguments Jes.Sorensen
2010-08-30 16:24 ` [Qemu-devel] " Paolo Bonzini
2010-08-30 17:13 ` Anthony Liguori
2010-08-30 15:35 ` [Qemu-devel] [PATCH 12/14] size_t is unsigned, so (foo >= 0) is always true Jes.Sorensen
2010-08-30 15:41 ` [Qemu-devel] " Anthony Liguori
2010-08-30 15:35 ` [Qemu-devel] [PATCH 13/14] Change DPRINTF() to do{}while(0) to avoid compiler warning Jes.Sorensen
2010-08-30 15:35 ` [Qemu-devel] [PATCH 14/14] load_multiboot(): get_image_size() returns int Jes.Sorensen
2010-08-30 19:25 ` [Qemu-devel] [PATCH 00/14] gcc extra warning fixes Blue Swirl
2010-08-31 7:21 ` Jes Sorensen
2010-08-31 17:43 ` Blue Swirl
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