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Questions on using GCC? Try the FAQ. If that doesn't work, you can ask on the help mailing list, gcc-help@gcc.gnu.org. There is an IRC channel dedicated to helping users with GCC at irc.libera.chat/#gcc.

Questions on developement of GCC? See below. If that doesn't answer your question, you can ask on the GCC mailing list gcc@gcc.gnu.org. There is an IRC channel dedicated to GCC development at irc.oftc.net/#gcc

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GCC devroom at FOSDEM 2026, January 31-Februrary 1, Brussels, Belgium
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For previous events see Past events

GCC Project Info

Developing GCC	Developing GCC Course Series	Using GCC
Getting Started with GCC Development Tutorials, HOWTOs, internal documentation EasyHacks GCC Patch Tracking Top-Level Bootstrap How to prepare a testcase A guide to testcase reduction Recording call-graphs with perf Improving GCC GCC Projects Improvement Projects Home Directions for Graphite 4.8 and beyond GCC re-architecture project - Border Control GCC Spec 2017 Improvements irange Best Practices Notes for GCC as a research compiler, beginners	GCC Course Series List of courses: GCC 101: Getting Started Developing GCC GCC 102: GCC Option handling for beginners GCC 110: Passes and pass manager for beginners GCC 201: Developing improving optimizations GCC 202: Developing improving backends GCC 203: Developing the C++ front-end GCC 204: Developing the rust front-end GCC 205: Developing gfortran GCC 301: Developing a new gimple optimization pass GCC 350: GCC vectorization for beginners The ones below here are just ideas and might never be done (or they might point to other tutorials): GCC 302: Developing a new target for GCC GCC 303: Developing a new front-end for GCC GCC 305: Developing a new IPA optimization pass GCC 305: Developing a new RTL optimization pass	User Information Frequently Asked Questions Installing GCC Proper C++ visibility support Math Optimization Flags Building Cross Toolchains with gcc Software floating point Link Time Optimization Frequently Asked Questions Exploiting Link Time Optimization Offloading to (GPU) Accelerators

Past Events

Miscellaneous

History of GCC
People
Proposed C++ coding conventions
Compiler comparison regarding volatile accesses
GCC developer blogs
GCC glossary and abbreviations and acronyms
Deadly sins for a compiler writer
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ListOfCompilerBooks
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Welcome to GCC Wiki

Upcoming Events

GCC Project Info

Getting Started with GCC Development

Improving GCC

GCC Course Series

User Information

Past Events

Miscellaneous

Old and no longer useful information