GNU Tools Cauldron 2025
We're in Portugal
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.
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
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).
Event Sponsors
AdaCore
ARM
BayLibre
Embecosm
NVIDIA
Synopsys
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.
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.