I have been doing this ugly thing:

```rust
#[macro_export]
macro_rules! itcm_static {
    (static $name:ident : $type:ty = $expr:expr) => {
        #[allow(non_snake_case)]
        let $name = {
            static mut INIT_FLAG: bool = false;
            core::assert!(!core::mem::replace(&mut unsafe { INIT_FLAG }, true));
            #[link_section = ".itcm"]
            static mut $name: core::mem::MaybeUninit<$type> = core::mem::MaybeUninit::uninit();
            #[allow(clippy::macro_metavars_in_unsafe)]
            unsafe { (*(&raw mut $name)).write($expr) }
        };
    };
}

```