Hello. We would like to suggest to the LSF/MM/BPF organization to have a working session on "compiled BPF", i.e. on the part of BPF that involves compilers and linkers. This mainly involves the two mainstream compilers that target BPF: clang and GCC, but other BPF toolchains are slowly appearing (like the Rust compiler) and that makes it even more important to consolidate compiled BPF. Examples of topics to cover are the covergence of the support in both clang/llvm and GCC, several aspects of the ABI that need to be discussed/clarified/decided in order to avoid undefined compiler behavior and divergences, issues related to the BPF standarization, and suggestions on how to lift some of the existing limitations impacting BPF C programs. The goal is to reach agreements about particular things, document the agreements, stick to them, and a clear plan to implement whatever is needed in the respective compilers/tools. Potential participants in case the activity takes place: - Both David Faust (GNU toolchain, BPF port hacker) and myself (GNU toolchain, BPF port maintainer) are willing to attend the event, prepare discussion material, organize and participate in the discussions. - Nick Desaulniers (LLVM maintainer) is also interested in attending and participating, provided other compromises he has in May don't get in the way. - More? (Please add yourself to this list by replying to this email in case you are interested.) Would the BPF community and the LSF/MM/BPF organization be interested in having such an activity?
