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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: How to get Ada to ?cross the chasm??
Date: Mon, 30 Apr 2018 22:36:34 +0100
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Date: 2018-04-30T22:36:34+01:00
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Norman Worth <nworth@comcastNOSPAM.net> writes:

> The compiler itself is open source, and direct derivatives of it must
> be open source, but it stops there.  The libraries, although open
> source, are licensed so that they may be included in proprietary
> works.

This is what gives rise to the problem: the compiler runtime library as
written/maintained by AdaCore has additional permisssions that allow
users to write proprietary software using it. This is the version of the
RTS that is supplied to their customers and ends up, somewhat later,
with the FSF compiler.

The Community Edition's RTS, on the other hand, has had the additional
permissions removed (by a script! you can see where they used to be) so
that it is vanilla GPL, and you can't release proprietary binaries using
it.