Function build

pub fn build()

Called from the build.rs of all crates which have a direct dependency on tracers and tracers_macros. This determines the compile-time configuration of the tracers crate, and performs any build-time code generation necessary to support the code generated by the tracers_macros macros.

It should be the first line in the main() function, etc:

// build.rs
use tracers_build::build;

fn main() {
    build();

    //....
}