From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH] build: disable default built-in rules and
 variables
Date: Tue, 1 Dec 2015 21:54:36 +0000
Message-ID: <565E171C.4030000@citrix.com>
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To: Doug Goldstein <cardoe@cardoe.com>, xen-devel@lists.xen.org
Cc: Ian Jackson <ian.jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>, Keir Fraser <keir@xen.org>, Ian Campbell <ian.campbell@citrix.com>, Jan Beulich <jbeulich@suse.com>
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On 01/12/2015 21:19, Doug Goldstein wrote:
> Disable the built-in rules and variables from GNU make to improve
> build performance and avoid awkward corner cases with the built-in
> rules. Currently none of the implicit rules are used but this is helpful
> to do when developing changes to the build system.
>
> Signed-off-by: Doug Goldstein <cardoe@cardoe.com>

Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

Trying this out, it reliably drops Xen's build time from ~58s to ~52s on
the dev box I have to hand.

~Andrew