From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:34013) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gk7sT-0006Hr-Hf for qemu-devel@nongnu.org; Thu, 17 Jan 2019 08:38:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gk7sS-00066n-8b for qemu-devel@nongnu.org; Thu, 17 Jan 2019 08:38:37 -0500 Received: from mx1.redhat.com ([209.132.183.28]:55400) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gk7sQ-00061T-E1 for qemu-devel@nongnu.org; Thu, 17 Jan 2019 08:38:36 -0500 From: Thomas Huth Date: Thu, 17 Jan 2019 14:38:12 +0100 Message-Id: <1547732292-14021-4-git-send-email-thuth@redhat.com> In-Reply-To: <1547732292-14021-1-git-send-email-thuth@redhat.com> References: <1547732292-14021-1-git-send-email-thuth@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PULL v3 26/28] seccomp: Work-around GCC 4.x bug in gnu99 mode List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Maydell , qemu-devel@nongnu.org Cc: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Li Qiang , groug@kaod.org, clg@kaod.org, mst@redhat.com We'd like to compile QEMU with -std=3Dgnu99, but GCC 4.8 currently fails to compile qemu-seccomp.c in this mode: qemu-seccomp.c:45:1: error: initializer element is not constant }; ^ qemu-seccomp.c:45:1: error: (near initialization for =E2=80=98sched_setsc= heduler_arg[0]=E2=80=99) This is due to a compiler bug which has just been fixed in GCC 5.0: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D63567 Since we still want to support GCC 4.8 for a while and also want to use gnu99 mode, work-around the issue by expanding the macro manually. Reviewed-by: Daniel P. Berrang=C3=A9 Reviewed-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Thomas Huth --- qemu-seccomp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/qemu-seccomp.c b/qemu-seccomp.c index 5c73e6a..36d5829 100644 --- a/qemu-seccomp.c +++ b/qemu-seccomp.c @@ -41,7 +41,8 @@ struct QemuSeccompSyscall { }; =20 const struct scmp_arg_cmp sched_setscheduler_arg[] =3D { - SCMP_A1(SCMP_CMP_NE, SCHED_IDLE) + /* was SCMP_A1(SCMP_CMP_NE, SCHED_IDLE), but expanded due to GCC 4.x= bug */ + { .arg =3D 1, .op =3D SCMP_CMP_NE, .datum_a =3D SCHED_IDLE } }; =20 static const struct QemuSeccompSyscall blacklist[] =3D { --=20 1.8.3.1