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bh=4wN5CzgKGTXdCB4lxfp3H84m9SlwUh5i6IVWBi5wlVk=; b=WfHJRd7ComJq7dB0bIHnHNv8oGDe3su1wOxoRhwVNLpdQ7/4FpherM8bKd3honodcjt1QT WtwNnUaQbBckO5nfYL0YysQBMDiWogBhVIK+Obs+WtSzW4b0eT15J5/qxiYsCjBL295Ew2 4Vowr5nu9kfRdCDcqMqv9dODMYMo3bc= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-51-cdvWw_o8MNuPEEHRmvEp8w-1; Mon, 28 Sep 2020 10:23:28 -0400 X-MC-Unique: cdvWw_o8MNuPEEHRmvEp8w-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C11161DDED; Mon, 28 Sep 2020 14:23:26 +0000 (UTC) Received: from redhat.com (ovpn-114-24.ams2.redhat.com [10.36.114.24]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E1AA760DA0; Mon, 28 Sep 2020 14:23:24 +0000 (UTC) Date: Mon, 28 Sep 2020 15:23:22 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Peter Maydell Subject: Re: [PATCH 1/3] qemu/compiler: Simplify as all compilers support attribute 'gnu_printf' Message-ID: <20200928142322.GJ2230076@redhat.com> References: <20200928125859.734287-1-philmd@redhat.com> <20200928125859.734287-2-philmd@redhat.com> <20200928140448.GH2230076@redhat.com> MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.14.6 (2020-07-11) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=berrange@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/28 03:29:35 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.687, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Cc: Thomas Huth , Richard Henderson , QEMU Developers , Paolo Bonzini , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Mon, Sep 28, 2020 at 03:14:45PM +0100, Peter Maydell wrote: > On Mon, 28 Sep 2020 at 15:06, Daniel P. Berrangé wrote: > > I think this can be simplified even more by using GLib's macros > > > > #define GCC_FMT_ATTR(n, m) G_GNUC_PRINTF(n, m) > > At least on my system G_GNUC_PRINTF() expands to > __format__(__printf__,...), not gnu_printf, so it is > not quite what we want. (The difference is that on Windows > hosts we still want to mark up our our logging functions as > taking the glibc style format handling, not whatever the > MS C library format escapes happen to be.) > At a minimum you'd need to keep in the "on Windows, > redefine __printf__ to __gnu_printf__" logic. > > See also commit 95df51a4a02a853. Oh, that's a bug in old GLib versions. I thought we had a new enough min to avoid that problem, but i guess not after all. Modern GLib always uses gnu_printf even on Windows, as they're using a replacement GNU compatible printf impl for all the GLib APIs that take format strings. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|