On Saturday, 15 April 2017 at 20:20:01 UTC, Bill Baxter wrote:
And more than that, companies that are serious about avoiding litigation will make sure that everyone working on this new project has not even seen the source code for the library with the other license. If someone who has seen the source code provides help, it will only be in the form of advice, not code, to make sure there is no possible argument that the copyright of the original was violated.


In the case of BLAS, there is a reference implementation in Fortran which is free for commercial use. They only ask the authors to be credited.

http://www.netlib.org/blas/#_blas_routines

Of course, one should not look at other implementations...

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