wasi-libc - 0.0~git20200731.215adc8-2 main

This is a work in progress. It's usable for many purposes, though the APIs
aren't stable yet. For example, this is used by the Rust compiler to build
its standard library for the wasm32-wasi target.
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First, it's a usable libc. It builds a "libc" which can be used by compilers,
such as Clang 8.0, using the wasm32-wasi target. It's a work in progress, but
it is already sufficient to run basic programs.
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Second, it's a "reference" implementation, which means the interfaces defined
here can be used by other tools and libraries, even if they don't use all the
actual implementations here. For example, we don't expect everyone will want to
use the exact malloc implementation provided here, but tools and libraries
using an ABI-compatible malloc interface will be able to interoperate
regardless of which actual implementation is used.
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Third, it's an example showing the use of the WASI API. The libc functionality
is implemented using calls to WASI functions.