GNU Tools Cauldron 2025

I work at Linaro.org as Toolchain Engineer, and I am a glibc maintainer.

Afonso Oliveira is a core developer of the RISC-V Unified Database project. He implemented UDB's initial instruction description format and verification infrastructure, and developed the automated generation tools for GNU toolchain integration and cross-verification.

Free Software activist and developer. Recognized by the Free Software Foundation with the Award for Advancement of Free Software. GNU Project speaker and advisor. FSF Latin America founding board member, FSF voting member. Co-maintainer of GNU Linux-libre, IRPF-Livre, GNU Compiler Collection, GNU binutils and GNU libc. Independent consultant with AdaCore.

All things BPF

Compiler Engineer/Code Sourcerer at BayLibre
Contributor of GCC's implementation of C++ P0847R7 Deducing this
Member of The ISO C++ committee (ISO/IEC JTC1 / SC22 / WG21)
Co-Author of P3668 Defaulting Postfix Increment and Decrement Operations

GCC engineer at Arm.

Baris is a technical lead at Intel working on GDB. He received his PhD and MSc from the University of Illinois at Urbana-Champaign, USA, and his BEng from Bilkent University, Turkey.

Upstream glibc developer with 20+ years of project experience.

One of 8 GNU Project package maintainers for glibc.

Downstream distribution developer for Fedora, CentOS Stream and Red Hat Enterprise Linux.

Bringing a "distribution" perspective to upstream conversations.

Dad, software generalist, stiltwalker, choose any three.
Longtime GNU/Linux user, working in the GNU Tools team in Arm for the past year and a half.

I am a toolchain engineer in Oracle Linux-Toolchain team.

Cupertino Miranda is a compiler engineer with 20 years of experience in GNU toolchain development. He holds a Ph.D. in Computer Science from University Paris-Sud, with a focus on compilers and parallelism, and a degree in Software Engineering from the University of Minho.

He has held engineering roles at Philips Research, INRIA (HiPEAC), ST-Ericsson, and Synopsys, contributing to architecture support and toolchain optimization. Currently at Oracle, he works on improving the GNU toolchain, with recent contributions to glibc and BPF support for GCC.

Member of the GCC Steering Committee

I work at Red Hat on GCC, focusing on diagnostics, user experience, and static analysis.

Dodji Seketeli is a member of the Platform Tools engineering team at Red Hat. He currently focuses on Application Binary Interface change analysis tooling across the full life cycle of the Red Hat Enterprise Linux related products.

I work on Linux Kernel BPF verifier since 2022, mostly on its core logic.
Before that I worked on high level to high level language transpilers for more than 10 years.

Toolchain engineer at Rivos

Florian is a long-time contributor to the GNU toolchain, particularly glibc. He currently serves as the glibc tech lead on the Red Hat Platform Tools team.

System software builder & designer.

Indu Bhagat is a member of the Linux Toolchains team at Oracle, Canada.

James worked for many years on Wall Street on quantitative research systems, implementing algorithms and designing databases to support them. For a decade he was the maintainer for FreeTDS (www.freetds.org), a client library for SQL Server. For the last several years, he's been extending gcc to recognize COBOL, with the (so far) secret ambition of enticing mainframe shops to embrace GCC and Linux.

GCC developer since 1998, since 2000 at SUSE. Associate professor at Charles University.

IBMer. Linux on Z Toolchain developer with a focus on GNU Binutils. Working on s390 64-bit (s390x) support for SFrame stack trace information in GNU Binutils, Glibc, and Linux Kernel.

Jeremy Bennett is Chief of Executive of Embecosm, a specialist open source consultancy, best known for its work with compiler and AI tool chains. He is author of the standard textbook "Introduction to Compiling Techniques" (McGraw-Hill 1990, 1995, 2003). Jeremy has attended every GNU Tools Cauldron and is a director of the GNU Tools Cauldron Community Interest Company.

RISC-V GCC developer, from ISCAS PLCT-lab

I’m a graduate student pursuing my Master’s with a passion for system programming, compilers, and open-source development. Though I’m new to contributing to GCC, I hope to make it a central part of my career one day.

GNU hacker and maintainer

Developing smtgcc, a translation validation tool for GCC.

Krzysztof (Chris) is the Free Software Foundation's licensing and compliance manager. He holds a doctorate in legal studies from Universiteit Leiden, the Netherlands, for a thesis which discussed the optimal framework for the protection of software freedom. His experience includes practicing law in Poland, advocating, and educating in the area of free and permissive licensing in various projects carried out by NGOs, educational, academic, and cultural institutions from Poland and other EU member states. Krzysztof also worked as a project coordinator, including in software development.

Kugan Vivekanandarajah is a CPU Compiler Engineer at NVIDIA. His work is primarily focused on implementing and enhancing optimizations for the AArch64 architecture.

I work in the CPU compiler team at NVIDIA, looking at GCC performance and features needed for our CPUs

Lancelot is GDB's maintainer of the AMDGPU backbend. He also is the tech lead for ROCgdb, AMD's downstream fork of GDB.

Hello, I am a junior compiler engineer passionate about compilers and low-level programming, with a particular focus on GCC internals.

Red Hat, Senior Principal Software Engineer, Platform Tools
He / Him / His

Debugedit, Elfutils, Valgrind maintainer
Sourceware Project Leadership Committee Member
DWARF Debugging Information Format Committee Member

I'm a Red Hat quality engineer focusing on linux toolchain.

IPA reviewer. Author of IPA-CP, IPA-SRA, tree-SRA and some related stuff. GCC GSoC org-admin.

I build tools for developers. My passion is open-source toolchains -- compilers, runtime libraries, linkers and debuggers -- and their developer communities.

I have started my career as GNU Toolchain developer, and now I am privileged to lead a world-class team of toolchain engineers at Linaro. We work on all aspects of LLVM and GNU toolchains -- GCC, Clang, Flang, Glibc, GDB, Binutils, and more -- for Arm architectures.

I work at SUSE on GCC, mostly on LTO

Paul‑Antoine Arras is a compiler engineer at BayLibre with a strong focus on open-source compiler projects, particularly GCC and LLVM. With a PhD in computer science from the University of Bordeaux, he has contributed to optimising compilers for RISC-V, AMD GPUs, and C++ software. His work includes the implementation of OpenMP features, support for custom instruction sets, and involvement in selective binary rewriting tools like SaBRe. Paul‑Antoine is also an active speaker and author in the field, with contributions to FOSDEM and GNU/Linux Magazine France.

Paul E. McKenney is a software engineer at Meta Platforms, and has been coding for almost half a century, with more than half of that on multicore hardware. Paul is lead maintainer of the RCU implementation within the Linux kernel, where the variety of workloads present highly entertaining performance, scalability, real-time response, and energy-efficiency challenges. Paul also is lead maintainer for the Linux-kernel memory model (LKMM).

Paul previously worked for IBM LTC, Sequent Computer Systems, SRI International, himself, and the Oregon State University Computer Center, with his work having migrated from the upper reaches of the application stack to the lower reaches of the Linux kernel.

He received bachelors degrees in Mechanical Engineering and Computer Science and a masters degree in Computer Science, all from Oregon State University, along with a Ph.D. in Computer Science and Engineering from the OGI School of Science & Engineering at Oregon Health & Science University. He holds more than 100 patents and has a few hundred publications, perhaps most notably a freely downloadable book entitled “Is Parallel Programming Hard, And If So, What Can You Do About It?”, which has been used in university courses and translated into Korean, Chinese, Japanese, and Russian. His hobbies include hiking and gym workouts along with the usual house-wife-and-grown-kids habit.

I've been contributing to GDB for close to two decades. In the last few years I've been spending most of my time working with AMD on ROCgdb, the AMD GPU debugger based on GDB.

Toolchain engineer at Embecosm SAS and lecturer at EPITA, Pierre-Emmanuel has been involved with gccrs for the past two years.

Pietra Ferreira is a member of Embecosm’s tool chain engineering team. She is well known for her contribution to the development of the Open Hardware Group’s GCC compiler tool chain. A former UKESF scholar, Pietra graduated from Brunel University with first class honours in Computer Science with a specialisation in AI.

Working in SUSE Labs on Toolchain. Release manager, vectorizer, and middle-end maintainer, global reviewer.

Robin has been working on the riscv target with a focus on vectorization for two and a half years now and worked on s390 before.

I am Segher. I am maintainer of the instruction combiner, and of the rs6000 backend.

IBMer primarily working on the GNU Compiler Collection for Linux on Z.

Steven Rostedt currently works for Google on the ChromeOS base OS performance team. Steven is one of the senior maintainers of the Linux kernel. He is the main developer, maintainer and creator of ftrace, the official tracer of the Linux kernel, as well as the user space tools and libraries that interact with it. Steven is one of the original developers for the Real Time patch (PREEMPT_RT) and still helps maintain the stable releases of the Real Time patch set. He also develops ktest.pl (in the kernel) and created the "make localmodconfig" kernel build option

Compiler Engineer at Arm Holdings

Software engineer, primarily working on GCC (GNU Compiler Collection), in particular adding support for OpenACC/OpenMP (directive-based parallel programming models) with code offloading to Nvidia GPUs (project started in 2013-06), and AMD GPUs. In 2018-09, appointed GCC/OpenACC maintainer, in 2023-07 appointed GCC/nvptx maintainer. Active member of the OpenACC Technical Committee.

Part of the team developing GCC/Rust: a GCC front end for the Rust programming language.

I also worked on glibc, GDB, binutils, etc., and had a brief look into the world of LLVM, but GCC etc. is still keeping me busy.

Employed by BayLibre.

Background in electrical engineering, focus on computer engineering, graduating from the Universität Stuttgart with a Diplom-Ingenieur (Dipl.-Ing., compare to M.Eng.) degree.

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Tiago Santos received the M.Sc. degree in Informatics and Computer Engineering from the University of Porto, Portugal, in 2020, where he is currently finishing a Ph.D. degree in Informatics Engineering. His current interests include CPU/FPGA heterogeneous computing, high-level synthesis and compilation techniques.

Tobias Burnus is a Senior Software Engineer at BayLibre's compiler-service team. His current focus is on the compiler support for OpenMP, OpenACC and GPU offloading for C, C++ and Fortran. He obtained an M.Sc. in Physics in 2004 from Free University Berlin and received 2008 a doctorate in the natural sciences (Dr. rer. nat.) from the University of Cologne; his research involved quantum-mechanical numerical calculations (DFT, CI) on molecules and solids. Tobias contributes since 2006 to the GNU Compiler Collection, initially mainly to its Fortran compiler. His interests include parallel computing, numerical calculations, parallel programming and heterogeneous programming. Tobias is a GCC maintainer for Fortran, OpenMP and OpenACC and contributes to the respective specifications.

I work on gcc RISC-V backend, for a few years now. I work at a startup called Rivos Inc. in Silicon Valley, where we are building High Performance RISC-V systems. I'm a seasoned Open Source Hacker still proud of my first public contribution to Busybox and over a career of 25 years I've ported, upstreamed and maintained Linux kernel, glibc and several others to multiple generation and ISA of Synopsys ARC processors.

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