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Dear GiNaC team,</div>
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first of all, thanks so much for your powerful projects GiNaC and CLN! </div>
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Thanks so much for making them open to us all! </div>
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Based on your projects (and others), I have developed a nice multi-physics finite element framework, which I would like to share with the world soon.</div>
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Of course, I will also go for the GPL, but I get conflicts, since I also have another dependency (pygmsh) using GPL v3, which is not compatible with GPL v2 of GiNaC and CLN.<br>
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I total, I have to satisfy BSD-3-Clause, BSD-2-Clause, MIT, LGPL-2.1-only, LGPL-2.1-or-later, GPL-2.0-or-later, GPL-2.0-only and GPL-3.0-only.</div>
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This configuration is not compatible under any outbound licence, unless I leave out either the GPL-2.0-only dependencies (GiNaC & CLN) or the GPL-3.0-only dependency (pygmsh).</div>
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Of course, I have read your statement in the FAQ:</div>
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<h3 class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; color: rgb(0, 0, 0);">I don't like the GPL. May I have another license, please?</span></h3>
<p class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><b>A:</b> The idea to dual-license
</span><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(176, 0, 0);"><b>G</b></span><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><b>i</b></span><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(176, 0, 0);"><b>N</b></span><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><b>a</b></span><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(176, 0, 0);"><b>C</b></span><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> has
been proposed a number of times. It has, however, been squarely rejected by some developers. Asking for a permission to dual-license it is likely going to waste your valuable time. That being said: The GPL is a good license. Why not directly put derived work
under the GPL, too?</span></p>
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<p class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><br>
</span></p>
<p class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">I am not asking for a dual-license, I support the ideas of the GPL myself, but I just
wonder whether there are any plans to go for GPL-2.0-or-later at any time?</span></p>
<p class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">If not, I have to get rid of the GPL-3.0 dependency, i.e. write my own interface to gmsh,
before I can publish my work under GPL-2.0-only as well.</span></p>
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</span></p>
<p class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Thanks for any information, help or suggestions in this issue!</span></p>
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<p class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Best regards,</span></p>
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</span></p>
<p class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Christian<br>
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