From owner-freebsd-drivers@FreeBSD.ORG  Tue Jul  2 08:53:51 2013
Return-Path: <owner-freebsd-drivers@FreeBSD.ORG>
Delivered-To: freebsd-drivers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id 7F1392B9
 for <freebsd-drivers@freebsd.org>; Tue,  2 Jul 2013 08:53:51 +0000 (UTC)
 (envelope-from insanegod.god@gmail.com)
Received: from mail-we0-x22c.google.com (mail-we0-x22c.google.com
 [IPv6:2a00:1450:400c:c03::22c])
 by mx1.freebsd.org (Postfix) with ESMTP id 1D2CA1DFA
 for <freebsd-drivers@freebsd.org>; Tue,  2 Jul 2013 08:53:50 +0000 (UTC)
Received: by mail-we0-f172.google.com with SMTP id q56so4159447wes.3
 for <freebsd-drivers@freebsd.org>; Tue, 02 Jul 2013 01:53:50 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:date:message-id:subject:from:to:content-type;
 bh=Kt4MN+ARyhBapYcTkttCyJRBcZ7fUblwi5SZJKIgI94=;
 b=voBBY656MTpp+pkW0d0XPhhRZVvm26DY8f14f5mTpZwrikizPVDv/r4NSVy0+bSHjz
 +v17U/L9Y72JO+hNl2ZiQH6/sUNXuIxbcBX8nEeBoArNdh7w2cVYEkOd9kCXetYCKo8F
 CS/x01aPO17ZlLGvM09f6f2H0McNbcTI6SdO7D9H05tDathEUvcw8uVlCD9gzojeRgUl
 qeaUAWvy1OlHfVX4v7SKvG6XLbvflrlHV852RdSnq4a54Ppo2HU5FsuFztoToaQQmvjS
 IPyr9n6FAbYFjbWKahR9QMMx4JXnnCb5GSwoJ20gdccz9RJESQ5HuAq0TPZ2NDLeNyU1
 4iKA==
MIME-Version: 1.0
X-Received: by 10.194.58.239 with SMTP id u15mr22622543wjq.87.1372755230323;
 Tue, 02 Jul 2013 01:53:50 -0700 (PDT)
Received: by 10.194.93.233 with HTTP; Tue, 2 Jul 2013 01:53:50 -0700 (PDT)
Date: Tue, 2 Jul 2013 01:53:50 -0700
Message-ID: <CAEaYdZdDtcQ0O3deQvCnPgtf_7YYtV3G0ZJf8Wy76iXPD+9Emw@mail.gmail.com>
Subject: Newbie question - Custom compiler flags in Makefile
From: Arjun <insanegod.god@gmail.com>
To: freebsd-drivers@freebsd.org
Content-Type: text/plain; charset=ISO-8859-1
X-Content-Filtered-By: Mailman/MimeDel 2.1.14
X-BeenThere: freebsd-drivers@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Writing device drivers for FreeBSD <freebsd-drivers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-drivers>, 
 <mailto:freebsd-drivers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-drivers>
List-Post: <mailto:freebsd-drivers@freebsd.org>
List-Help: <mailto:freebsd-drivers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-drivers>,
 <mailto:freebsd-drivers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 02 Jul 2013 08:53:51 -0000

Hey,

I am writing a memory driver and i am using the standard freebsd driver
Makefile which includes .bsd.kmod.mk

So, this comes with its own compiler flags. Specifically, i dont want the
-Wmissing-prototypes option. How do i remove it.

In general, how can one change the default compiler flags for compilation. ?

I read bsd.sys.mk file and it seems that for the above option to be
removed, i need to have WARNS <3. But i want all other -W options except
for this.

How do i do this.?

Any help is appreciated.

Thanks