From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-patches-return-316626-listarch-gcc-patches=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 2643 invoked by alias); 11 Apr 2012 18:19:12 -0000
Received: (qmail 2624 invoked by uid 22791); 11 Apr 2012 18:19:09 -0000
X-SWARE-Spam-Status: No, hits=-4.8 required=5.0	tests=AWL,BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,KHOP_RCVD_TRUST,KHOP_THREADED,RCVD_IN_DNSWL_LOW,RCVD_IN_HOSTKARMA_YE
X-Spam-Check-By: sourceware.org
Received: from mail-we0-f175.google.com (HELO mail-we0-f175.google.com) (74.125.82.175)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 11 Apr 2012 18:18:50 +0000
Received: by wera1 with SMTP id a1so847968wer.20        for <gcc-patches@gcc.gnu.org>; Wed, 11 Apr 2012 11:18:48 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.216.134.155 with SMTP id s27mr10708146wei.80.1334168328752; Wed, 11 Apr 2012 11:18:48 -0700 (PDT)
Received: by 10.216.93.203 with HTTP; Wed, 11 Apr 2012 11:18:48 -0700 (PDT)
In-Reply-To: <CAESRpQBp6ZyKAB25k2UFNk3Tu9RSjQoECGfnG6Za1bEwiXnmsw@mail.gmail.com>
References: <CAESRpQA8nho1vKe9hQ7CLDmgxyFb9tw4R6Q4NuaztUsFEpphMg@mail.gmail.com>	<4F7F686B.1060909@redhat.com>	<CAESRpQCL8u0Gks+wL376QvOui2sYw+qHnVkLnmDUH6Ukwc6bYA@mail.gmail.com>	<4F7FA6E5.6020201@redhat.com>	<CAESRpQBwZCcJTosftfD4JO9F8vNeUhPgu_My9OHkNT8L1be3Gg@mail.gmail.com>	<4F810F61.4060102@redhat.com>	<CAESRpQCz7SaFy4epbKL3Ke7kTrydxrh+1mrzQwCvObschaxk8A@mail.gmail.com>	<4F8231E6.7020304@redhat.com>	<CAESRpQDeMhibqqtMEFZc_ga73oFDu=rTZqQAh5tpUhG011y_Vw@mail.gmail.com>	<4F83628A.2040300@redhat.com>	<CAESRpQDN2UYP3AEG_pHVm32pYtJ8xtFjM3GnSUvdscqMSm-iSA@mail.gmail.com>	<4F848A9F.8070905@redhat.com>	<CAESRpQCMJKFFn5iAZrJCu8Q1zx6vPqpD9p8z8GnP2ij0gMx2WA@mail.gmail.com>	<CAESRpQCeg4-cE4R5fjfySYYV8px8jwCZ6HmFsMPwfn3Lf9FRZA@mail.gmail.com>	<CAMe9rOoCHdBG8rtR4+YKFdCUzmsAJ0xwxKferD0m7SZ9DRM8Og@mail.gmail.com>	<CAESRpQBp6ZyKAB25k2UFNk3Tu9RSjQoECGfnG6Za1bEwiXnmsw@mail.gmail.com>
Date: Wed, 11 Apr 2012 18:19:00 -0000
Message-ID: <CA+=Sn1kiFQMy6_8bbAE69ghhvzXtt3kNWxfpX2om1rg6zuWg3A@mail.gmail.com>
Subject: Re: [PATCH] Caret diagnostics
From: Andrew Pinski <pinskia@gmail.com>
To: =?UTF-8?B?TWFudWVsIEzDs3Blei1JYsOhw7Fleg==?= <lopezibanez@gmail.com>
Cc: "H.J. Lu" <hjl.tools@gmail.com>, Jason Merrill <jason@redhat.com>, 	Gcc Patch List <gcc-patches@gcc.gnu.org>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
X-IsSubscribed: yes
Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-patches.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-patches/>
List-Post: <mailto:gcc-patches@gcc.gnu.org>
List-Help: <mailto:gcc-patches-help@gcc.gnu.org>
Sender: gcc-patches-owner@gcc.gnu.org
X-SW-Source: 2012-04/txt/msg00688.txt.bz2

On Wed, Apr 11, 2012 at 11:15 AM, Manuel L=C3=B3pez-Ib=C3=A1=C3=B1ez
<lopezibanez@gmail.com> wrote:
> So how can I say in tcl "if not defined VAR then set VAR ""?

if ![info exists VAR] {
  set VAR XXX
}

Thanks,
Andrew Pinski