[$] Kernel hackers at Cauldron, 2025 edition

The GNU Tools Cauldron is almost entirely focused on user-space tools, butkernel developers need a solid toolchain too. In what appears to be adeveloping tradition (started in 2024),some kernel developers attended the 2025 Cauldron for thesecond year in a row to discuss their needs with the assembled toolchaindevelopers. Topics covered in this year's gathering include Rust, betterBPF typeformat (BTF) support, SFrame, and more.