Add project: libc (Rust)

[KamilaBorowska]

Basic info

Project name: libc
Project link: https://github.com/rust-lang/libc

Qualifications

ZeroVer's patent-pending zero-based versioning
scheme can obviously be used by everyone, but not every usage is
necessarily notable. Check that the first and at least one other
criterion apply:

• A current ZeroVer-compliant version (0.*) or long history of ZeroVer usage, and
• Very wide exposure (i.e., 1,000+ GitHub stars), or
• Active promotion as part of a paid product or service (e.g., Hashicorp Vault), or
• Relative maturity and infrastructural importance (e.g., Compiz, docutils)

Additional notability info

libc is one of the most popular libraries for Rust programming language providing bindings to platforms' system libraries. It is depended on by 39,123 crates. A release of libc 0.2.0 in 2015 (back when the language was much smaller) caused an event known as "libcpocalyse" causing a lot of crates to break due to incompatible type definitions (structures defined in different versions of crates are different) - for example, Servo had to coordinate upgrading 52 dependencies.

The library is so popular at this point that releasing 1.0 is tricky as doing so could break everything: rust-lang/libc#547.

Citation info

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