I was talking about an internal library as in "a library developed inside My Company that is not made public"; as someone working for My Company, you'd have the

I was talking about an internal library as in "a library developed inside My Company that is not made public"; as someone working for My Company, you'd have the responsibility to change the license of said library. Of course if you're using a library you're not an author of, the library must already be compatible otherwise you just can't use it.