Date: Tue, 8 Feb 2005 13:23:48 +0100 (CET)
From: Roman Zippel <zippel@linux-m68k.org>
To: Matthew Wilcox <matthew@wil.cx>
cc: Sam Ravnborg <sam@ravnborg.org>,
       Kai Germaschewski <kai@germaschewski.name>,
       linux-kernel@vger.kernel.org, dholland@eecs.harvard.edu
Subject: Re: [PATCH] Makefiles are not built using a Fortran compiler
In-Reply-To: <20050208030228.GE20386@parcelfarce.linux.theplanet.co.uk>
Message-ID: <Pine.LNX.4.61.0502081322310.6118@scrub.home>
References: <20050208030228.GE20386@parcelfarce.linux.theplanet.co.uk>
MIME-Version: 1.0
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Sender: linux-kernel-owner@vger.kernel.org
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Hi,

On Tue, 8 Feb 2005, Matthew Wilcox wrote:

> 
> David Holland pointed out that Make has a lot of implicit suffix rules
> built in and you can disable them by setting ".SUFFIXES:".  As an
> example, checking the debugging information shows we no longer try to
> compile anything from a '.f' suffix.  This turns out to be good for a 15%
> speedup on a build with nothing to do; down from 29.1 seconds to 24.7
> seconds on my K6.

Enabling the following in the Makefile should have the same effect:

# For maximum performance (+ possibly random breakage, uncomment
# the following)

#MAKEFLAGS += -rR

bye, Roman
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