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bjorn3 dda5ea883a Fix debuginfo for machO This only fixes it when using object::write as backend, and not when using faerie. There were two problems: * object::write doesn't replace .debug_info with __debug_info, unlike faerie * machO requires section relative relocations, and not symbol relative relocations. When using symbol relative relocations, the linker interprets the relocations as section relative. Thus writing the wrong values to the debug sections. Fixes #303		2019-10-19 15:37:07 +02:00
build_sysroot	Reenable debug assertions for libstd on macOS	2019-09-14 12:49:23 +02:00
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example	Add extern type pointer cast tests	2019-09-21 11:32:11 +02:00
patches	Rustup to rustc 1.40.0-nightly (`237d54ff6` 2019-10-15)	2019-10-16 18:43:52 +02:00
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cargo.sh	Test rust-lang/regex example shootout-regex-dna	2019-07-30 13:37:54 +02:00
Cargo.toml	Test object::write backend on travis	2019-10-19 10:56:35 +02:00
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Readme.md

WIP Cranelift codegen backend for rust

⚠⚠⚠ Threads and certain kinds of FFI don't work yet. ⚠⚠⚠

Building

$ git clone https://github.com/bjorn3/rustc_codegen_cranelift.git
$ cd rustc_codegen_cranelift
$ ./prepare.sh # download and patch sysroot src and install hyperfine for benchmarking
$ ./test.sh

Usage

$cg_clif_dir is the directory you cloned this repo into in the following instruction.

Cargo

$ $cg_clif_dir/cargo.sh run

Rustc

$ rustc -Cpanic=abort -Zcodegen-backend=$cg_clif_dir/target/debug/librustc_codegen_cranelift.so --sysroot $cg_clif_dir/build_sysroot/sysroot my_crate.rs

Not yet supported

Good non-rust abi support (several problems)
Checked binops (some missing instructions in cranelift)
Inline assembly (no cranelift support, not coming soon)
SIMD (tracked here, some basic things work)

Troubleshooting

Can't compile

Try updating your nightly compiler. You can try to use an nightly a day or two older if updating rustc doesn't fix it. If you still can't compile it, please fill an issue.