Compile wolfSSL from source.

This crate provides a [Build] API for compiling the wolfSSL C library from source via the [cc] crate. It is used by wolfcrypt-sys when the vendored feature is enabled (similar to the openssl-src / openssl-sys pattern).

Usage

let artifacts = wolfssl_src::Build::new().build();
println!("lib dir: {}", artifacts.lib_dir.display());
println!("include dir: {}", artifacts.include_dir.display());

The builder discovers wolfSSL sources in order:

1. source_dir() programmatic override
2. WOLFSSL_SRC environment variable
3. pkg-config (looks for a wolfssl package whose prefix contains source files)