Update some sim copyright headers to GPLv3-or-later

[Mike Frysinger]

On Friday 21 December 2012 13:14:43 Joel Brobecker wrote:
> > do you have pkg.m4 available ?  i don't know what distro you're using,
> > but perhaps it splits it up into multiple packages so that you can
> > have `pkg- config` but not pkg.m4.
> 
> I indeed have a file called pkg.m4 available in my system.
> However, I did not use the system aclocal, since the one
> that comes with my system has the wrong version. If I use
> the system aclocal, then I indeed get a complete aclocal.m4
> being generated, with the only differences being in the header
> due to the difference in version.
> 
> I think this is somewhat of an issue that the output would
> depend on what is or isn't installed together with aclocal,
> and that aclocal would generate an incomplete output without
> indicating any kind of failure. But I understand that, in
> the grand scheme of things, there are more critical issues
> to work on, and that this might not be our doing...

this is common behavior when using aclocal.  but the sourceware tree does try 
to be a bit more "stand alone" when it comes to 3rd party dependencies.  i 
think the Blackfin sim subdir is treading somewhat new water here.

maybe the answer is to copy pkg.m4 from the latest pkg-config release into the 
top level config/ dir ?
-mike
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