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Rollup merge of #131830 - hoodmane:emscripten-wasm-eh, r=workingjubilee

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Add support for wasm exception handling to Emscripten target

This is a draft because we need some additional setting for the Emscripten target to select between the old exception handling and the new exception handling. I don't know how to add a setting like that, would appreciate advice from Rust folks. We could maybe choose to use the new exception handling if `Ctarget-feature=+exception-handling` is passed? I tried this but I get errors from llvm so I'm not doing it right.
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Jacob Pratt 2025-01-06 22:04:13 -05:00 • committed by GitHub
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src/doc/unstable-book/src/compiler-flags/emscripten-wasm-eh.md Normal file
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# `emscripten-wasm-eh`
Use the WebAssembly exception handling ABI to unwind for the
`wasm32-unknown-emscripten`. If compiling with this setting, the `emcc` linker
should be invoked with `-fwasm-exceptions`. If linking with C/C++ files, the
C/C++ files should also be compiled with `-fwasm-exceptions`.