build_epoch

A simple Rust compiler plugin macro for generating an i64 specifying, in seconds, the time that the target crate was built in relation to epoch (1970-01-01T00:00:00Z).

```rust

![feature(plugin)]

![plugin(build_epoch)]

fn main() { // At the time of writing, this prints "1437740236": println!("{}", build_epoch!()); } ```

The static value of build_epoch!() is determined when the compiler expands its first occurrence.