One-time mutable references to your local static variables.

#[local_static]
fn main() {
    static mut FOO: u32 = 0;
    *FOO = 42;
}

Functions with #[local_static] attribute can only be called once.

• Safe &'static mut references to local static mut variables.
• Support for #[link_section] attribute.
• Similar limitation and errors as regular static mut.

This crate is a generalization of a similar transformation done by the #[entry] macro in the cortex_m_rt crate.

• static-cell provides a wrapper type that gives a &'static mut T to its internals in a safe way.