Error code E0775

#[cmse_nonsecure_entry] is only valid for targets with the TrustZone-M extension.

Erroneous code example:

#![feature(cmse_nonsecure_entry)]

#[cmse_nonsecure_entry]
pub extern "C" fn entry_function() {}

To fix this error, compile your code for a Rust target that supports the TrustZone-M extension. The current possible targets are:

• thumbv8m.main-none-eabi
• thumbv8m.main-none-eabihf
• thumbv8m.base-none-eabi

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