From owner-svn-ports-head@FreeBSD.ORG  Sat Jan 25 08:56:10 2014
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Date: Sat, 25 Jan 2014 08:56:10 +0000
From: Alexey Dokuchaev <danfe@FreeBSD.org>
To: Marcus von Appen <mva@FreeBSD.org>
Subject: Re: svn commit: r340996 - in head/lang: python python2 python3
Message-ID: <20140125085610.GA38716@FreeBSD.org>
References: <201401250846.s0P8kBI1007669@svn.freebsd.org>
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On Sat, Jan 25, 2014 at 08:46:11AM +0000, Marcus von Appen wrote:
> New Revision: 340996
> URL: http://svnweb.freebsd.org/changeset/ports/340996
> QAT: https://qat.redports.org/buildarchive/r340996/
> 
> -	${LN} -sf ${PREFIX}/bin/${file}${PYTHON_MAJOR_VER} ${PREFIX}/bin/${file}
> +	${LN} -sf ${PREFIX}/bin/${file}${PYTHON_MAJOR_VER} \
> +		${STAGEDIR}${PREFIX}/bin/${file}
> [ ... lots of similar changes skipped ... ]

Per our own wiki.freebsd.org/ports/StageDir:

  "When creating a symlink, prepend ${STAGEDIR} to the target path only (and
   generally try to avoid using absolute paths in source). [...]

   Note that source of ${PREFIX}/lib/libfoo.so.42, while seemingly okay,
   could be in fact incorrect, since absolute path can potentially point to
   a wrong location, e.g. when remote filesystem (with installed package)
   is mounted via NFS under non-root mount point. Relative paths are less
   fragile (and often much shorter)."

./danfe