Example usage

Cargo.toml:

```toml [lib] name = "foo" crate-type = ["dylib"]

[dependencies] export_cstr = "*" ```

lib.rs:

```rust

![feature(plugin, libc)]

[plugin] #[macrouse] extern crate exportcstr;

extern crate libc; use libc::c_char;

export_cstr!(FOO, "this becomes an exported symbol 'FOO' which points to a constant, null-terminated, C string");

// ... ```