From owner-freebsd-ports@FreeBSD.ORG  Wed Jul  6 14:33:35 2011
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Date: Wed, 06 Jul 2011 17:33:32 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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Subject: cpumask_t/cpuset_t changes in CURRENT and non-base gcc
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I think that if you use non-base gcc for ports on CURRENT, then you need to follow
this procedure after upgrading world to a revision after the cpumask_t/cpuset_t
change:
1. upgrade/re-install gccXX using base gcc as a bootstrap compiler (make CC=gcc)
2. everything else... :)

-- 
Andriy Gapon