From patchwork Fri Oct 5 14:00:22 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Hajnoczi X-Patchwork-Id: 189503 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 9CDDD2C0093 for ; Sat, 6 Oct 2012 00:39:50 +1000 (EST) Received: from localhost ([::1]:43095 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TK8TK-0008FX-LA for incoming@patchwork.ozlabs.org; Fri, 05 Oct 2012 10:01:46 -0400 Received: from eggs.gnu.org ([208.118.235.92]:34132) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TK8SS-0005yc-Jg for qemu-devel@nongnu.org; Fri, 05 Oct 2012 10:01:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TK8SR-0006Np-CQ for qemu-devel@nongnu.org; Fri, 05 Oct 2012 10:00:52 -0400 Received: from mail-bk0-f45.google.com ([209.85.214.45]:44818) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TK8SR-0006HH-1T for qemu-devel@nongnu.org; Fri, 05 Oct 2012 10:00:51 -0400 Received: by mail-bk0-f45.google.com with SMTP id jf3so815270bkc.4 for ; Fri, 05 Oct 2012 07:00:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=013IqUg5rnVbYZBY7uYlP1O83aLElpTrFSwacOxqU5A=; b=pKXOJoOb0pM5eavhRfanXwT4AMoTOq9ggnS7X5lpRS+v4nJjP+eyFM381JgPfV+tRG XqNRroC5dbQv82lailcc8XuYr9QRmwfWiROqPbZter+eiu15Wlw9XLmquC7rO/kgyMOU 4fQijsDm5x8SYBIbX9WnS2aRQDoLZDm8RwsMl6aqACLQSUKH9XQ3Fzr+Dnh5Z1tTV5ZG NVS/j/jwFQynAYH4lLIJnLZm+Qe3NUUdk6qX3559apKlC/bEqR3zpx/pXJ09Hv+ZMeH9 q2hkiWYrIKgpadgBFNMMccUGuDoQfLswr89pmThek7g36JGw3Yg3+ung80DiMjfeIwVx hlbQ== Received: by 10.204.153.28 with SMTP id i28mr2801779bkw.19.1349445650447; Fri, 05 Oct 2012 07:00:50 -0700 (PDT) Received: from localhost (188-194-152-192-dynip.superkabel.de. [188.194.152.192]) by mx.google.com with ESMTPS id 1sm5057724bks.3.2012.10.05.07.00.49 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 05 Oct 2012 07:00:49 -0700 (PDT) From: Stefan Hajnoczi To: Anthony Liguori Date: Fri, 5 Oct 2012 16:00:22 +0200 Message-Id: <1349445632-23674-3-git-send-email-stefanha@gmail.com> X-Mailer: git-send-email 1.7.11.4 In-Reply-To: <1349445632-23674-1-git-send-email-stefanha@gmail.com> References: <1349445632-23674-1-git-send-email-stefanha@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 209.85.214.45 Cc: Stefan Weil , qemu-devel@nongnu.org, Stefan Hajnoczi Subject: [Qemu-devel] [PATCH 02/12] configure: Support empty target list (--target-list=) 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 From: Stefan Weil Specifying an empty target list with --target-list= is shorter than specifying --disable-user --disable-system. Both variants should give the same result: no targets at all. This modification implements that feature. It uses a trick which works with POSIX compliant shells to test whether target_list is undefined (=> default targets) or empty (=> no targets). Signed-off-by: Stefan Weil Signed-off-by: Stefan Hajnoczi --- configure | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/configure b/configure index e58846d..e51a793 100755 --- a/configure +++ b/configure @@ -125,7 +125,8 @@ cc_i386=i386-pc-linux-gnu-gcc libs_qga="" debug_info="yes" -target_list="" +# Don't accept a target_list environment variable. +unset target_list # Default value for a variable defining feature "foo". # * foo="no" feature will only be used if --enable-foo arg is given @@ -1288,7 +1289,7 @@ if ! "$python" -c 'import sys; sys.exit(sys.version_info < (2,4) or sys.version_ exit 1 fi -if test -z "$target_list" ; then +if test -z "${target_list+xxx}" ; then target_list="$default_target_list" else target_list=`echo "$target_list" | sed -e 's/,/ /g'`