Rjack wrote:
Uhmmmmm. No 17 USC 103(b)?
17 USC 103(b) is irrelevant to the GPL. That section of the law
refers to the copyrights that the creator of a combined work gets
on the part of the work that is his alone, and that this added
copyright does not affect the duration of the copyright of the
existing material.
The ORIGINAL and MODIFYING authors BOTH waive their exclusive
copyrights in the work "as a whole" in order to distribute.
It's a bilateral contract.
It's not a bilateral contract, and no one (in the case of the
GPL) is . Each author, independently acting under 17 USC 106,
authorizes the making and distribution of copies of the work he
owns provided certain conditions are met. When the author of the
combined work licenses it as a whole under the GPL, he can do
this because the license of each piece, created by the author of
that piece, permits him to do so.