a.rs

#![crate_type = "dylib"]
pub const FOO: &str = "FOO";
pub static BAR: &str = "BAR";

b.rs

#![crate_type = "dylib"]
extern crate a;
pub fn doit() {
    println!("b const {:?}", a::FOO as *const str);
    println!("b static {:?}", a::BAR as *const str);
}

c.rs

#![crate_type = "dylib"]
extern crate a;
pub fn doit() {
    println!("c const {:?}", a::FOO as *const str);
    println!("c static {:?}", a::BAR as *const str);
}

d.rs

extern crate b;
extern crate c;
fn main() {
    b::doit();
    c::doit();
}

powershell

> rustc a.rs -Cprefer-dynamic; rustc b.rs -L.; rustc c.rs -L.; rustc d.rs -L.; ./d.exe
b const 0x7ffdfd2821b0
b static 0x7ffdf6552150
c const 0x7ffdfe4f21b0
c static 0x7ffdf6552150