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Date: Mon, 22 Jul 2002 13:03:00 -0000
From: Paul Koning <pkoning@equallogic.com>
To: neil@daikokuya.co.uk
Cc: gcc@gcc.gnu.org
Subject: Re: Unused macros warning?
References: <20020722063352.GA22349@daikokuya.co.uk>
X-SW-Source: 2002-07/txt/msg01028.txt.bz2

>>>>> "Neil" == Neil Booth <neil@daikokuya.co.uk> writes:

 Neil> I made a local modification to cpplib so that, if -Wunused, it
 Neil> reports all macros defined in the main file that are unused, or
 Neil> unused before being #undef-ed.

 Neil> Might this be a useful addition to mainline?  It shouldn't be
 Neil> in -Wall, as it involves a slightly expensive hashtable walk at
 Neil> the end of preprocessing which most users wouldn't want to pay
 Neil> for, but could be enabled with the front ends' -Wunused, say.

I assume you would also add a -Wunused-macros so you can separately
enable or disable this.  The latter is important if I want the
existing unused warnings but not this new one.

	 paul