We're in Portugal

Call for Proposals is closed (as of 2025-08-31)

GNU Tools cauldron 2025 (2025-09-22) - IS SOLD OUT. Please get on the waitlist if you wish to attend and we'll process this in order.

The GNU Tools Cauldron goes to Portugal!

The 2025 edition of the event for GNU Toolchain developers will be hosted in the city of Porto over the weekend of 26 to 28 of September.

Thursday 25th - Welcome gathering
Starting from 19:30
Location: Carniceiro, ZERO Box Lodge Porto R. do Ateneu Comercial do Porto 13, 4000-092 Porto
OpenStreetMaps
Google Maps

This event is still to be determined, but the intent is to provide a place for early attendees to gather and meet.

Saturday 27th - Evening Reception
The evening reception will be held on Saturday September 27th at Barão Fladgate.
Location: Rua do Choupelo 250, 4400-088 Vila Nova de Gaia, Portugal
Dinner will be served, and Taylor cellar tours will be available.
The reception runs from 6:30pm to 11pm.
Suggested arrival time is 6:30pm for cave tours.
OpenStreetMap
Google Maps

Date:
Fri-Sun, September 26-28, 2025.

Location:
Faculty of Engineering of the University of Porto (FEUP)
Porto, Portugal
Address: Rua Dr. Roberto Frias, s/n 4200-465 Porto, Portugal

Campus Map & How to get to FEUP
OpenStreeMap
Google Maps

Travel:

International travellers can arrive to Porto via the Porto Airport (OPO).

Please be aware that the ground handling staff at Porto Airport are expected to strike over the 26-28 September 2025 period, which may affect your arrival or departure. You are therefore advised to:

Stick with hand luggage or carry‑on bags only, where possible. This reduces the risk of losing bags or facing baggage‑handling delays.
Closely monitor your email and airline app alerts for updates about your flights. Strikes may lead to sudden cancellations or last‑minute changes.
Arrive at the airport early, as delays at check‑in and baggage drop can add a significant amount of time.

Please stay informed through your airline, airport notices, or trusted travel authorities and seek advice from your travel agent.

Accommodation:

The conference venue can be conveniently reached by Metro (yellow line) and so is accessible to the rest of the city of Porto. Hotels and accommodation are available within walking distance of FEUP.

Registration:
Please head to GNU Tools Cauldron 2025 Tickets to register.

The registration fee is 80 GBP.

We want to enable as many people as possible to attend the GNU Tools Cauldron and if the ticket price is a limiting factor please reach out to the organizing committee.

Organizers

Organizing committee:

You can reach the organizing committee at organizers@gnu-tools-cauldron.org

Gomathi Anandan
Jeremy Bennett
Tobias Burnus
Richard Earnshaw
David Edelsohn
Jan Hubička
Jose E. Marchesi
Simon Marchi
Cupertino Miranda
Carlos O'Donell
Elena Zanonni

Event co-organized by the Department of Informatics Engineering of the Faculty of Engineering of the University of Porto (FEUP).

Pretalx – Conference event software
Pretix – Conference ticketing software

Thank you to Pretalx and Pretix for their generous discounts and service hosting!

If you would like to sponsor the event please reach out to sponsoring@gnu-tools-cauldron.org

Invitation or Support Letters

The GNU Tools Cauldron will provide formal invitation letters to attendees who request them. If you need documentation beyond registration receipts for your organization to approve of your attendance at the GNU Tools Cauldron 2025, please contact the organizing committee.

If you need a letter for your visa application, we can provide a support letter that you can submit with your visa application. Our visa letters typically include date and location of the event and any speaking roles. Visa support letters are provided 3-5 business days after you have confirmed and paid for your registration. If you need a visa support letter, please start by contacting the organizing committee to initiate the process, but please do not provide any personally identifying information until requested.

Attendance Grants

The GNU Tools Cauldron is committed to the event being inclusive. The cost of the tickets should not be a blocker to attendance. If it is please email organizers@gnu-tools-cauldron.org.

Travel Grants

The GNU Toolchain Fund sponsors developer travel to attend the GNU Tools Cauldron. Travel grants cover some or all of travel-related expenses.

Individuals should email information about their participation in the GNU Toolchain, interests, experience, an estimated budget, and any sponsors in the GNU Toolchain community to organizers@gnu-tools-cauldron.org

The deadline to submit a request is 31 August 2025.

Additional information for the travel grant process is documented here: https://gcc.gnu.org/wiki/GNUToolchainFund

Code of Conduct

The event is covered by our Code of Conduct here.

Please email the GNU Tools Cauldron Code of Conduct Committee for any code of conduct violation reports.

Media Consent

Registering for the conference implies giving consent to be recorded if the speaker has not opted-out of recording the talk.

Data Protection

Information collected during the call for proposals process will be held in compliance with GDPR regulations. It will only be used for purposes directly connected with organising the GNU Tools Cauldron 2025 and will be destroyed once it is no-longer needed. The personal information we hold on you is your name, email address, affiliation, dietary preferences, T-shirt size. The data is held securely on outsourced secure servers where the data is encrypted.

The Data Controller is GNU Tools Cauldron CIC.
The Data Officer is Jan Hubicka honza.hubicka@gmail.com, on behalf of the GNU Tools Cauldron CIC.

Please contact the Data Officer if you would like to know the information we hold on you, wish to have that information amended or deleted, or for any other queries related to GDPR.

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