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Ship libc for WASI #8489

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DagAgren opened this issue Apr 10, 2021 · 3 comments · Fixed by #8837
Closed

Ship libc for WASI #8489

DagAgren opened this issue Apr 10, 2021 · 3 comments · Fixed by #8837
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arch-wasm 32-bit and 64-bit WebAssembly contributor friendly This issue is limited in scope and/or knowledge of Zig internals. enhancement Solving this issue will likely involve adding new logic or components to the codebase. os-wasi standard library This issue involves writing Zig code for the standard library. zig cc Zig as a drop-in C compiler feature
Milestone
0.8.0

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@DagAgren
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Currently, wasm32-wasi can not build C code that uses libc, leaving it fairly useless for C.

There is a libc for WASI based partly on musl: https://github.com/WebAssembly/wasi-libc

(Vaguely related: WASI has the separate concepts of "commands" and "reactors", where commands use main() and run once, while reactors just export a number of functions, and have an _initialize entry point instead of _start that is used to initialise libc internals in C code. Related issue here: #6757)
@kubkon
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kubkon commented Apr 19, 2021

Pinging @fengb as I believe he’s done some work on this back in the day, and also @jedisct1 as this might be of interest to you too.

As far as the issue is concerned, this is an excellent good first issue for anyone wanting to contribute to Zig. Of course, I’d be more than happy to mentor!

@kubkon kubkon added arch-wasm 32-bit and 64-bit WebAssembly backend-c The C backend (CBE) outputs C source code. contributor friendly This issue is limited in scope and/or knowledge of Zig internals. enhancement Solving this issue will likely involve adding new logic or components to the codebase. os-wasi standard library This issue involves writing Zig code for the standard library. zig cc Zig as a drop-in C compiler feature and removed backend-c The C backend (CBE) outputs C source code. labels Apr 19, 2021
@kubkon kubkon added this to the 0.8.0 milestone Apr 19, 2021
@kubkon kubkon mentioned this issue May 19, 2021
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@kubkon
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kubkon commented May 19, 2021

@DagAgren just an FYI that it's happening! #8837

@DagAgren
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Yesssss nice one!

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arch-wasm 32-bit and 64-bit WebAssembly contributor friendly This issue is limited in scope and/or knowledge of Zig internals. enhancement Solving this issue will likely involve adding new logic or components to the codebase. os-wasi standard library This issue involves writing Zig code for the standard library. zig cc Zig as a drop-in C compiler feature
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0.8.0
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cc,wasi: ship WASI libc and autobuild it when needed ziglang/zig
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@kubkon @DagAgren