> *GPLv3 only offers a provision to require it.* IIRC, this was inserted into GP...

teddyh 10 months ago | parent | context | favorite | on: Ask HN: How do you get over the fear of sharing co...

> GPLv3 only offers a provision to require it.

IIRC, this was inserted into GPLv3 precisely so that older software with that requirement, but otherwise under a permissive license, could be relicensed into GPLv3 if necessary.