rustc_codegen_gcc: A gcc codegen for the Rust compiler
summary
rustc_codegen_gcc plugs libgccjit into rustc and is now merged into the main Rust repo; it can compile the Rust compiler with GCC codegen and the produced compiler successfully builds and runs a hello world. support added for globals, packed structs, inline asm, symbol visibility, many intrinsics and 128-bit integers (mdns on non-native 128-bit targets still broken). UI tests gain +461 passing and 50 fewer failures; stdarch x86_64 almost green with ~12 failures left. missing: unwinding/panic, debug info, and LTO; many GCC patches still upstream work.
AI-written summary · about
chapters (18)
- 0:00Introduction to project
- 1:48Progress since last year
- 8:03Current features summary
- 9:27Future work needed
- 11:15Challenges with Rust API
- 14:21GCC improvements needed
- 15:28Compiling Rust for Linux
- 16:53Distribution and patches
- 17:55Target triple and architectures
- 18:39How to contribute
- 20:06Q&A: GCC vs LLVM integration
- 21:33Q&A: Favorite part of project
- 21:57Q&A: Link time optimization
- 23:30Q&A: Godbolt integration
- 24:39Q&A: High-level thoughts on approaches
- 25:43Q&A: Disadvantages of approach
- 26:47Q&A: GCC flag support
- 27:08Q&A: Output file formats
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