From patchwork Tue Nov 22 12:35:25 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Avi Kivity X-Patchwork-Id: 127073 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [140.186.70.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 85AE2B70B2 for ; Tue, 22 Nov 2011 23:36:06 +1100 (EST) Received: from localhost ([::1]:40510 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RSpZq-0006VK-O7 for incoming@patchwork.ozlabs.org; Tue, 22 Nov 2011 07:35:54 -0500 Received: from eggs.gnu.org ([140.186.70.92]:42011) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RSpZd-0006Tu-DN for qemu-devel@nongnu.org; Tue, 22 Nov 2011 07:35:50 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RSpZZ-0002Q7-HW for qemu-devel@nongnu.org; Tue, 22 Nov 2011 07:35:41 -0500 Received: from mx1.redhat.com ([209.132.183.28]:34978) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RSpZZ-0002Pu-2p for qemu-devel@nongnu.org; Tue, 22 Nov 2011 07:35:37 -0500 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id pAMCZZrF028830 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 22 Nov 2011 07:35:35 -0500 Received: from cleopatra.tlv.redhat.com (cleopatra.tlv.redhat.com [10.35.255.11]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id pAMCZYMT016964; Tue, 22 Nov 2011 07:35:35 -0500 Received: from s01.tlv.redhat.com (s01.tlv.redhat.com [10.35.255.8]) by cleopatra.tlv.redhat.com (Postfix) with ESMTP id 4BF6F250B98; Tue, 22 Nov 2011 14:35:30 +0200 (IST) From: Avi Kivity To: Anthony Liguori , qemu-devel@nongnu.org Date: Tue, 22 Nov 2011 14:35:25 +0200 Message-Id: <1321965325-32050-1-git-send-email-avi@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.11 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 209.132.183.28 Cc: Paolo Bonzini , Gerd Hoffmann Subject: [Qemu-devel] [PATCH v2 1.0] configure: tighten pie toolchain support test for tls variables X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Some toolchains don't support pie properly when tls variables are in use. Disallow pie when such toolchains are detected. Signed-off-by: Avi Kivity --- v2: give tls_var a type; avoids invisible warning configure | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-) diff --git a/configure b/configure index 75e1f10..6158b8f 100755 --- a/configure +++ b/configure @@ -1120,7 +1120,10 @@ fi if test "$pie" != "no" ; then cat > $TMPC << EOF -int main(void) { return 0; } + +static __thread int tls_var; + +int main(void) { return tls_var; } EOF if compile_prog "-fPIE -DPIE" "-pie"; then QEMU_CFLAGS="-fPIE -DPIE $QEMU_CFLAGS"