Gentoo Archives: gentoo-dev

From: William Hubbs <williamh@g.o>
To: gentoo-dev@l.g.o
Subject: Re: [gentoo-dev] the state of dev-lang/lua
Date: Sun, 24 Mar 2019 18:46:14
Message-Id: 20190324184607.GA28283@linux1.home
In Reply to: Re: [gentoo-dev] the state of dev-lang/lua by contact@hacktivis.me
1 On Sun, Mar 24, 2019 at 12:24:26PM +0100, contact@×××××××××.me wrote:
2 > [2019-03-23 16:23:27] William Hubbs:
3 > > The first thing is liblua as a shared library. If you are using lua
4 > > internally in a program, upstream strongly recommends not linking it
5 > > this way; it is supposed to be statically linked into the executable.
6 > > Because of this, and because of the amount of custom patching we do to
7 > > maintain liblua as a shared library, I plan to stop creating the shared
8 > > library.
9 >
10 > Pretty sure removing the shared version of liblua will cause a large
11 > amount of patching to be done in a lot of software that may not support
12 > static linking out of the box.
13
14 I will look into this, but I think you are talking about build systems
15 that don't read pkgconfig files or something similar.
16
17 >
18 > > I'm a bit undecided still about slotting lua. I'm sure we
19 > > need subslots so we can force rebuilds when new lua releases enter the
20 > > tree. However, I'm still unsure whether we need slots. I don't know of
21 > > many things in the tree that are locked to a specific version
22 > > of lua (there is only one package based on an irc conversation I
23 > > had this week).
24 > > Does anyone have any thoughts? Are there more packages in the tree that
25 > > are locked to a specific version of lua?
26 >
27 > There should be slotting of lua, for example in the few programs that
28 > I know will need it:
29 >
30 > - app-editors/vis::{lua,lanodanOverlay}: Requires >=lua-5.2
31 > does not support luajit (incomplete 5.2 compatibility)
32
33 This example isn't really a slot, just a lower bound. This is pretty
34 common.
35
36 > - media-video/mpv: requires lua:5.2 or luajit
37 > doesn’t seems to plan supporting 5.3[1]
38
39 This is more concerning, so I'll take a look at it.
40
41 >
42 > Also the lua overlay, which I would highly recommend using as a base
43 > has a slotted version of lua, instead of extending SLOT="0".
44
45 There were many concerns about lua.eclass in the overlay when it was
46 presented here for inclusion in the tree, and it was never presented
47 again [1]. I also spoke with the previous maintainer of dev-lang/lua and
48 he was concerned about it.
49
50 William
51
52 [1] https://archives.gentoo.org/gentoo-dev/message/befce09046d0c80e3cbbee543a378f59

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