wit-bindgen-rt

This is an internal implementation detail of the wit-bindgen crate. The source for this crate lives at https://github.com/bytecodealliance/wit-bindgen and this crate is located in crates/guest-rust/rt folder. The purpose of this crate is to contain "runtime" code related to the macro-expansion of the wit_bindgen::generate! macro such that the wit-bindgen crate dependency can be removed in some situations.

This crate contains a precompiled object file and archive at src/cabi_realloc.o and src/libwit_bindgen_cabi_realloc.a. This is compiled from the source src/cabi_realloc.c and is checked in as precompiled to avoid needing a C compiler at compile-time which isn't always available. This object file is only used on wasm targets.

The object file is compiled by [this script]https://github.com/bytecodealliance/wit-bindgen/blob/main/ci/rebuild-libcabi-realloc.sh) and is verified in repository continuous integration that the checked-in versions match what CI produces.