A minimal no_std program


use core::panic::PanicInfo;

fn panic(_panic: &PanicInfo) -> ! {
    loop {}
  • This will compile to an empty binary.
  • std provides a panic handler; without it we must provide our own.
  • It can also be provided by another crate, such as panic-halt.
  • Depending on the target, you may need to compile with panic = "abort" to avoid an error about eh_personality.
  • Note that there is no main or any other entry point; it’s up to you to define your own entry point. This will typically involve a linker script and some assembly code to set things up ready for Rust code to run.