On 2020-10-13 at 15:01:51 -0600, Karl Berry wrote:
> rather than any technical restriction: pdfTeX is GPL.
>
> FWIW, I suspect Thanh would not have a problem with allowing use of
> those primitive implementations under CC0 or any other license terms.
AFAIK it's under GPL because it contains libraries from xpdf and maybe
a few others which were already under GPL.
Regards,
Reinhard
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