According to a recent audit on OpenBSD, softfloat 2a is considered "non-free":
A will note that I don't trust their interpretation, but "I Am Not A Lawyer" and upstream did update the package and its license:
From the homepage:
For those who may need it, SoftFloat versions preceding Release 3 have been updated to Release 2c (2015 January). The only changes in this release compared to earlier releases 2a and 2b are these:
Some bugs are fixed that affected correct compilation for some 64-bit processors only.
The documentation has been improved in minor ways.
The restrictions on legal use have been further clarified (not applicable to Release 3 or later).
FreeBSD is using the same old (2a) version but we obtained it with modifications from NetBSD. I created a problem report on NetBSD as well (NetBSD PR 54799). The issue needs further investigation.
(In reply to Pedro F. Giffuni from comment #0)
Since the link is now dead, I'll add some background information. The hyperbola project is "a hard fork of the OpenBSD kernel and userspace including new code written under GPLv3 and LGPLv3 to replace GPL-incompatible parts and non-free ones"
They send a report to libertyBSD (another OpenBSD fork), where they claimed:
The following files do not allow distribution. This was fixed in newer versions, including SoftFloat 3.
"The restrictions on legal use have been clarified (not applicable to Release 3 or later)." http://www.jhauser.us/arithmetic/SoftFloat.html
They also mention a bunch of files without license that are of little interest for us at this time.