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Date: Mon, 2 Dec 2019 01:48:24 +0000
From: Mark Linimon <linimon@lonesome.com>
To: Jan Beich <jbeich@FreeBSD.org>
Cc: Gunther Nikl <gnikl@justmail.de>, freebsd-x11@freebsd.org
Subject: Re: mesa: LLVM_DEFAULT usage
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While not germane to the use of LLVM itself, I firmly believe
that the LLVM_DEFAULT Makevar should never be overridden.  It is
set in Mk/bsd.default-versions.mk and thus ought to be set by
user choice.

Please see:

  https://wiki.freebsd.org/HardcodedLLVMVersions#Ports_That_Redefine_LLVM_VERSION

mcl