Date: Tue, 31 Mar 2015 21:39:37 +0200 From: David Naylor <dbn@freebsd.org> To: Roland Smith <rsmith@xs4all.nl> Cc: freebsd-python@freebsd.org Subject: Re: USE_PYTHON=concurrent Message-ID: <3956416.IomzSLxEPG@dragon.local> In-Reply-To: <20150331184738.GA95383@slackbox.erewhon.home> References: <3945228.UPHqZybedq@dragon.local> <20150331184738.GA95383@slackbox.erewhon.home>
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On Tuesday, 31 March 2015 20:47:38 Roland Smith wrote:
> On Mon, Mar 30, 2015 at 09:14:40PM +0200, David Naylor wrote:
> > Hi,
> >=20
> > I am investigating converting my ports to concurrent however I am n=
ot sure
> > how concurrent is supposed to work:
> >=20
> > I looked in /usr/ports/Mk and only found a documentation reference =
to
> > 'concurrent'. Setting USE_PYTHON=3Dconcurrent doesn't appear to ac=
tually
> > change any behaviour.
> >=20
> > Please could you explain this for me?
>=20
> From =E2=80=9C/usr/ports/Mk/Uses/python.mk=E2=80=9D:
>=20
> concurrent - Indicates that the port can be installed for
> different python versions at the same time. The por=
t
> is supposed to use a unique prefix for certain
> directories using USES=3Duniquefiles:dirs (see the
> uniquefiles.mk Uses for details about the
> directories), if set to yes. Binaries receive an
> additional suffix, based on ${PYTHON_VER}.
>=20
> The values for the uniquefiles USES are set as
> follows:
>=20
> UNIQUE_PREFIX=3D ${PYTHON_PKGNAMEPREFIX}
> UNIQUE_SUFFIX=3D -${PYTHON_VER}
>=20
> If the port is installed for the current default
> python version, scripts and binaries in
>=20
> ${PREFIX}/bin
> ${PREFIX}/sbin
> ${PREFIX}/libexec
>=20
> are linked from the prefixed version to the
> prefix-less original name, e.g.
> bin/foo-2.7 --> bin/foo.
>=20
> So it seems that any port that only installs modules in
> =E2=80=9C/usr/local/lib/pythonX.Y/site-packages/=E2=80=9D could be la=
beled as concurrent
> as-is.
>=20
> If your port wants to put things in DOCSDIR, EXAMPLESDIR, DATADIR, WW=
WDIR or
> ETCDIR, you should add =E2=80=9CUSES=3Duniquefiles:dirs=E2=80=9D to y=
our port's Makefile.
>=20
> Also read =E2=80=9C/usr/ports/Mk/Uses/uniquefiles.mk=E2=80=9D.
Thank you for your explanation, to confirm:
So 'concurrent' shouldn't actually change any logic, but act as a flag =
for a=20
build tool at actually build multiple versions of the port based on ava=
ilable=20
and supported python versions? (However one might need to use uniquefi=
les to=20
prevent file conflicts with the multiple packages from this port.) =20
Regards
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