From nobody Mon Feb 9 07:56:02 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1671564489905407.9911398313784; Tue, 20 Dec 2022 11:28:09 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p7iH1-0004bw-Ee; Tue, 20 Dec 2022 14:27:35 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p7iGz-0004aI-Ba for qemu-devel@nongnu.org; Tue, 20 Dec 2022 14:27:33 -0500 Received: from coyote.holtmann.net ([212.227.132.17] helo=mail.holtmann.org) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p7iGx-0002Zf-Kj for qemu-devel@nongnu.org; Tue, 20 Dec 2022 14:27:33 -0500 Received: from fedora.. (p4fefcc21.dip0.t-ipconnect.de [79.239.204.33]) by mail.holtmann.org (Postfix) with ESMTPSA id 5DFD8CED12; Tue, 20 Dec 2022 20:27:27 +0100 (CET) From: Marcel Holtmann To: qemu-devel@nongnu.org, mst@redhat.com, xieyongji@bytedance.com Cc: marcel@holtmann.org Subject: [PATCH v2 08/10] libvduse: Provide _GNU_SOURCE when compiling outside of QEMU Date: Tue, 20 Dec 2022 20:27:20 +0100 Message-Id: <9a5749cfb693472aec7d6b0e1ed7a188aa0db94f.1671563795.git.marcel@holtmann.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=212.227.132.17; envelope-from=marcel@holtmann.org; helo=mail.holtmann.org X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1671564492562100001 When the libvduse sources are used by another project, it can not be guaranteed that _GNU_SOURCE is set by the build system. If it is for example not set, errors like this show up. CC libvduse.o libvduse.c: In function =E2=80=98vduse_log_get=E2=80=99: libvduse.c:172:9: error: implicit declaration of function =E2=80=98ftruncat= e=E2=80=99; did you mean =E2=80=98strncat=E2=80=99? [-Werror=3Dimplicit-fun= ction-declaration] 172 | if (ftruncate(fd, size) =3D=3D -1) { | ^~~~~~~~~ | strncat The simplest way to allow external complication of libvduse.[ch] by setting _GNU_SOURCE if it is not already set by the build system. Signed-off-by: Marcel Holtmann --- subprojects/libvduse/libvduse.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/subprojects/libvduse/libvduse.c b/subprojects/libvduse/libvdus= e.c index e089d4d546cf..c871bd331a6b 100644 --- a/subprojects/libvduse/libvduse.c +++ b/subprojects/libvduse/libvduse.c @@ -16,6 +16,10 @@ * later. See the COPYING file in the top-level directory. */ =20 +#ifndef _GNU_SOURCE +#define _GNU_SOURCE +#endif + #include #include #include --=20 2.38.1