From nobody Mon Feb 9 02:57:00 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 1671628404185134.89668071263225; Wed, 21 Dec 2022 05:13:24 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p7yrh-0005BL-SC; Wed, 21 Dec 2022 08:10:33 -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 1p7yrg-00056v-ES for qemu-devel@nongnu.org; Wed, 21 Dec 2022 08:10:32 -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 1p7yre-0005C6-VN for qemu-devel@nongnu.org; Wed, 21 Dec 2022 08:10:32 -0500 Received: from fedora.. (p4fefcc21.dip0.t-ipconnect.de [79.239.204.33]) by mail.holtmann.org (Postfix) with ESMTPSA id EBB04CED14; Wed, 21 Dec 2022 14:10:29 +0100 (CET) From: Marcel Holtmann To: qemu-devel@nongnu.org, mst@redhat.com, xieyongji@bytedance.com Cc: marcel@holtmann.org Subject: [PATCH v3 01/10] libvhost-user: Provide _GNU_SOURCE when compiling outside of QEMU Date: Wed, 21 Dec 2022 14:10:17 +0100 Message-Id: <9d286986fe538c3f7da8acad28f5ef3af0c4adc1.1671628158.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: 1671628406216100003 Then the libvhost-user 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 libvhost-user.o libvhost-user.c: In function =E2=80=98vu_panic=E2=80=99: libvhost-user.c:195:9: error: implicit declaration of function =E2=80=98vas= printf=E2=80=99; did you mean =E2=80=98vsprintf=E2=80=99? [-Werror=3Dimplic= it-function-declaration] 195 | if (vasprintf(&buf, msg, ap) < 0) { | ^~~~~~~~~ | vsprintf The simplest way to allow external complication of libvhost-user.[ch] is by setting _GNU_SOURCE if it is not already set by the build system. Signed-off-by: Marcel Holtmann --- subprojects/libvhost-user/libvhost-user.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/subprojects/libvhost-user/libvhost-user.c b/subprojects/libvho= st-user/libvhost-user.c index d6ee6e7d9168..b55b9e244d9a 100644 --- a/subprojects/libvhost-user/libvhost-user.c +++ b/subprojects/libvhost-user/libvhost-user.c @@ -13,6 +13,10 @@ * later. See the COPYING file in the top-level directory. */ =20 +#ifndef _GNU_SOURCE +#define _GNU_SOURCE +#endif + /* this code avoids GLib dependency */ #include #include --=20 2.38.1