The GNU Tools Cauldron 2025 was hosted at the Faculty of Engineering of the University of Porto (FEUP) last September 26th, 27th and 28th 2025.
This year the event was co-organized by the Department of Informatics Engineering (DEI) of FEUP.
At the opening session, the Director of DEI, João Paiva Cardoso, emphasized: “It is a pleasure to host this event for the first time in Portugal and, in particular, in Porto. The contributions of GNU have had a profound impact on education, research, and technological advancement for the common good.”
The GNU Tools Cauldron is a dedicated annual technical conference for the GNU Toolchain (gcc, binutils, glibc, gdb) and related FOSS developer tooling (ltrace, poke, systemtap, valgrind…). The event is a deeply technical conference that covers innovation, and future direction for the projects, bringing together developers from across the globe to engage and collaborate.
The GNU Toolchain is the system toolchain for many of the leading Linux distributions (AlmaLinux, CentOS Stream, Debian, Fedora, Gentoo, RHEL, Rocky Linux, SUSE, Oracle Linux) and a trusted part of the global secure software supply chain.
The conference is attended annually by over a hundred international experts in the areas of compilers, static linking, dynamic linking, runtime language libraries and developer tooling. Conference attendees contribute internationally to software standards development including ISO C, ISO C++, DWARF, OpenMP, POSIX/IEEE, Rust, and more, and bring their expertise to the event presentations.
Once a year, the GNU Toolchain community, along with many other FOSS tool developers, gather together to discuss, empower, and talk about innovations in compilers, assembler, static linkers, core libraries and tooling.
The development of the GNU Toolchain is a part of the GNU Project, and supported by the FSF and a worldwide community of developers and corporate sponsors.
Main event webpage: https://conf.gnu-tools-cauldron.org/opo25/
Program: https://conf.gnu-tools-cauldron.org/opo25/schedule/