[M3devel] On the way to release other packages in GPL?

Tue Aug 29 09:02:38 CEST 2017

  1.  But I don't think he could sue w/o ownership. He could only encourage the owners to.

2. Static linking gcc makes everything in
D:\dev2\cm3.1\m3-sys\m3cc\gcc\gcc\m3cg

GPL -- at least when linked to gcc. But can't we dual license?

The files/content I am interested in:
m3-def.h

I am the author of this. It is derived perhaps from some Modula-3 code.
It is a funny file. It is C preprocessor and a long way toward our IR reading.

And then m3cg.h -- this is machine generated. Not sure how that licensed in general.

And then parse.c.
Some large fraction of this is the IR reader and independent of gcc.
And might be a good basis for other backends -- external backends written in C or C++ in particular.

I haven't super much pushed on this because in principle, while I do like C and C++,
I wrote the C backend in Modula-3 to try to really use this system, and writing/reading the IR
is kinda well recognized as unnecessarily inefficient approach. It is used by m3cc as a license
dodge, not for perhaps the best other engineering reasons.

 An LLVM system could use this approach, but could also generate LLVM IR in-proc, as I believe
 we have, or write the binary or textual "bitcode" -- again slower, but has advantages.

 However, I do have another idea.
 The M3CG IR could be the basis of a JIT or interpreter.
 They could be the distributed files.
 And that could be written in C or C++.
 And then these files become useful.

 It isn't clear however, when thinking about JIT, where to draw the lines in the pipeline -- how far to "lower"
 before redistributing. While we have this IR in hand, it isn't maybe stable enough long term.
 Unless the JIT was tightly bound to the IR somehow.
 We have changed it fairly regularly. We had no reason not to.

 - Jay

________________________________
From: Hosking, Antony L <hosking at purdue.edu>
Sent: Monday, August 28, 2017 5:14 AM
To: Jay K
Cc: Hendrik Boom; m3devel at elegosoft.com
Subject: Re: [M3devel] On the way to release other packages in GPL?

On Aug 28, 2017, at 3:11 PM, Jay K <jayk123 at hotmail.com<mailto:jayk123 at hotmail.com>> wrote:

So, I think
1. Modula-3 maybe matters less these days?

It is the precedent that mattered to him.  He didn’t care about M3 either way.

2. It is the code owners that would have to object, right?

I think, in principle, the way m3cg is built against gcc it must go under GPL.

- Jay
________________________________
From: Hosking, Antony L <hosking at purdue.edu<mailto:hosking at purdue.edu>>
Sent: Sunday, August 27, 2017 10:06:46 PM
To: Jay K
Cc: Hendrik Boom; m3devel at elegosoft.com<mailto:m3devel at elegosoft.com>
Subject: Re: [M3devel] On the way to release other packages in GPL?

On Aug 28, 2017, at 10:18 AM, Jay K <jayk123 at hotmail.com<mailto:jayk123 at hotmail.com>> wrote:

Please no GPL.
I want it all BSD, and one license for it all. Including the m3cg.h or such that I wrote that is currently GPL. I'll send mail on it later. Dual license might be required. This file in particular is C preprocessor code that helps read our IR. I'd also like to BSD parse.c but not clear we can. Try & see if anyone objects? Surely nobody will.

RMS himself hit the roof when the original M3CG front-end to gcc was done, as he saw it as a threat to GPL.  So, I wouldn’t count on that.

- Jay
________________________________
From: M3devel <m3devel-bounces at elegosoft.com<mailto:m3devel-bounces at elegosoft.com>> on behalf of Hendrik Boom <hendrik at topoi.pooq.com<mailto:hendrik at topoi.pooq.com>>
Sent: Sunday, August 27, 2017 4:40:46 PM
To: m3devel at elegosoft.com<mailto:m3devel at elegosoft.com>
Subject: Re: [M3devel] On the way to release other packages in GPL?

On Sat, Aug 26, 2017 at 07:29:18PM +0000, Daniel Alejandro Benavides D. wrote:
> Hello:what if we ask to release all Modula-3 in GPL?https://www.dwheeler.com/misc/simplify-hp-release.txt<https://secure-web.cisco.com/13bieYcRaletSOr3TeMBWhIaYEtg9rhYJS5oSKcTQvwIbVNu84_XxQ8RHJjhOxZZTlzWIoYEMQpv9Ne0danK8csSo_l7Ade-8RJ-9ODwtcee8KZ1pGOQJb895kthpXEtWHoklxUe5Hjaorxo4sSR-dtzhIIJ2KKeQL6LLlsjrB_wGoN9a_acXpF_fDHOIiiKbNyGWCxckblkmW8i-TBbfQ9M8KGXmoCrYcKAmmTgi7kaV4VsqoTObFKlXCILodrAyvqGSSK4hhtH8yrYcV3iSjk5UZ-evRH2_UDpddb1j83Wf_cEpiLA1KPoGYWlWHdsKoessBzT1vNAUOSQB8f7KpDLY8LoBgqbP8yqxQkd7iho/https%3A%2F%2Fwww.dwheeler.com%2Fmisc%2Fsimplify-hp-release.txt>
> Thanks in advance

You can release every package *you*write using the GPL.

But you'll have licence compatibility issues because the majority of
Modula 3 code is not covered by the GPL unless you also release it
under a license compatible with the one that most of the Modula 3
stuff is licenced under.

There's nothing difficult about having two licences.  It just means
there are two possible conditions under which someone can use and copy
them.  Its enough for either to apply, and it gets out of bothersome
licence compatbility restrictions.

-- hendrik
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