From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mathieu Lirzin <mthl@gnu.org>
Subject: Re: octave license is incompatible with openssl
Date: Fri, 05 Aug 2016 13:43:16 +0200
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In-Reply-To: <87vazfd1tw.fsf@gmail.com> (Alex Vong's message of "Fri, 05 Aug
	2016 17:03:55 +0800")
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To: Alex Vong <alexvong1995@gmail.com>
Cc: guix-devel@gnu.org

Alex Vong <alexvong1995@gmail.com> writes:

> John Darrington <john@darrington.wattle.id.au> writes:
>
>> I would not be at all suprised if there were more incompatibilities like
>> this.  Ought we not have  a lint rule that checks this?
>>
> Indeed, in the short term, we could lint for special case, such that
> openssl appears as an input for an GPLv[123](+) package.
>
>
> In the long term, we could have the following in guix. Since licenses
> are scheme values. I was thinking we can have procedure like:
>
>   (compatible? l1 l2)
>
> which is a reflexive and symmetric relation. Also, we might be able to
> build compound licenses by:
>
>   (dual-license lics ...)
>
> and
>
>   (intersect-license lics ...)
>
> The 3 procedures should satisfy the following "laws":
>
>   (compatible? l1 (dual-license lics ...))
>
> if and only if
>
>   (any (cut compatible? l1  <>) lics)
>
> Similarly,
>
>   (compatible? l1 (intersect-license lics ...))
>
> if and only if
>
>   (every (cut compatible? l1  <>) lics)
>
>
> How do everyone think?
>

I like the idea!

-- 
Mathieu Lirzin