license: Where does GPL-3.0-with-GCC-exception come from? #258

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1. slivingston commented on Oct 18, 2026

   

   slivingston

   on Oct 18, 2026

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   Slycot itself is not licensed under GPL-3.0-with-GCC-exception AND BSD-2-Clause, but rather, several dependencies have those licenses. The addition to pyproject.toml was via #252 and I suspect that pyproject.toml was updated to make it unambiguous that the wheel (a built file with linked dependencies included) is subject to all of those licenses.

   @roryyorke I read through the comments at #252 but I did not see any disagreement about changing pyproject.toml. However, I think putting the licenses of dependencies in the license field is not the intended meaning of the license field. The combination of licenses is only applicable to bundled binary distributions (e.g., wheels on PyPI). What do you think about changing pyproject.toml to the original license = "GPL-2.0 AND BSD-3-Clause" ?

   If you approve, I'm happy to open a PR and tag the person who made the comment about bundling licenses.
2. roryyorke commented on Oct 19, 2026

   

   roryyorke

   on Oct 19, 2026 via email

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   @slivingston I think you're right. Please do open a PR. I'm unlikely to review before Saturday, but more than happy for others to review and merge.

   …

   On Sun, 18 Oct 2026, 21:00 Scott C. Livingston, ***@***.***> wrote: *slivingston* left a comment (python-control/Slycot#258) <#258 (comment)> Slycot itself is not licensed under GPL-3.0-with-GCC-exception AND BSD-2-Clause, but rather, several dependencies have those licenses. The addition to pyproject.toml was via #252 <#252> and I suspect that pyproject.toml was updated to make it unambiguous that the *wheel* (a built file with linked dependencies included) is subject to all of those licenses. @roryyorke <https://github.com/roryyorke> I read through the comments at #252 <#252> but I did not see any disagreement about changing pyproject.toml. However, I think putting the licenses of dependencies in the license field is not the intended meaning of the license field. The combination of licenses is only applicable to bundled binary distributions (e.g., wheels on PyPI). What do you think about changing pyproject.toml to the original license = "GPL-2.0 AND BSD-3-Clause" ? If you approve, I'm happy to open a PR and tag the person who made the comment about bundling licenses <#252 (comment)> . — Reply to this email directly, view it on GitHub <#258?email_source=notifications&email_token=AAA3C7SOT3NSIXXOXUYO6ZT5UUHNXA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTMMRVGM4DKNZZGYZKM4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJLDGN5XXIZLSL5RWY2LDNM#issuecomment-6253857962>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAA3C7TXLI6TW3SHWUO3Q7L5UUHNXAVCNFSNUABEKJSXA33TNF2G64TZHM3DMMBQGE2DQMB3JFZXG5LFHM2TSMJSGIYDENBUGWQXMAQ> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/AAA3C7TVH3WWM4SF3Z4KT235UUHNXA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTMMRVGM4DKNZZGYZKM4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJKTGN5XXIZLSL5UW64Y> and Android <https://github.com/notifications/mobile/android/AAA3C7ROSTZPTBJU4SBMH235UUHNXA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTMMRVGM4DKNZZGYZKM4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJLTGN5XXIZLSL5QW4ZDSN5UWI>. Download it today! You are receiving this because you were mentioned.Message ID: ***@***.***>
3. holgersson32644 commented on Oct 19, 2026

   

   holgersson32644

   on Oct 19, 2026

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   Thanks for the clarification and the fast responses!
   I'll keep this issue open and let you close by the merge then.