James A. Roskind wrote the original ANSI-C.y.
 His license (found in ANSI-C.y) requires that a program print a "Portions copyright..." message, and include his copyright text.
 He states that there are no other license requirements.

Eric A. Brewer and Michael D. Noakes created and modified several
early C parsers.  They released it under an MIT license, which allows
any further use.  If you can find a version of that parser, you can do
anything you want, including closing the source (but you must observe
Roskind's licensing requirements.)

Robert C. Miller took that and wrote C2C, and released under the MIT license.

Several other members of the Cilk reseach group worked on various
things.  Some of it is credited and some is not.  If something is not
credited to someone, either they may have neglected to write their
name on it, or someone may have deleted the notice.  Bradley has tried
to fix as much of that up as possible.

The Barnes-Hut code appears to have a MIT-style license from Joshua
E. Barnes, since there are no obvious restrictions.  However that is
not completely clear, so we left the license as it was.  It seems
clear that anyone may copy and modify the Barnes-Hut code.  Whether
they may distribute binaries without distributing sources, I don't
know.  We'll simply distribute the sources.

Bobby Blumofe wrote a restrictive license for lu.cilk.  On Dec 25,
2002, he said it is OK to put it under GPL.

At some point Matteo and Bradley converted everything that we could to
GPL or LGPL.  Thus, everything that was previously released under the
MIT license is now GPL'd or LPGL'd.

