Function menhir::cargo_rustc_flags

pub fn cargo_rustc_flags() -> Result<()>

Instructs Cargo where to find the menhir_runtime

This will input a line of the form cargo:rustc-link-search=... to the standard output. If this function is run from a build.rs script, this will have the effect of making rustc search for libraries in that location when compiling the generated code.