LLVM contemplates relicensing
The LLVM project is currently distributed under the BSD-like NCSA license, but the
project is considering a change in the interest of better patent
protection. "After extensive discussion involving many lawyers with different
affiliations, we recommend taking the approach of using the Apache 2.0
license, with the binary attribution exception (discussed before), and add
an additional exception to handle the situation of GPL2 compatibility if it
ever arises."