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Remove use of the start feature

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`#![feature(start)]` was removed in [1], but we make use of it in the
intrinsics example. Replace use of this feature with `#[no_mangle]`
applied to `#[main]`.

We don't actually run this example so it is not a problem if this is not
entirely accurate. Currently the example does not run to completion,
instead invoking `rust_begin_unwind`.

[1]: https://github.com/rust-lang/rust/pull/134299
This commit is contained in:
Trevor Gross 2025-01-27 12:56:15 +00:00 • committed by Trevor Gross
parent ffefc5ad82
commit 64e0a0a68d
1 changed files with 5 additions and 7 deletions
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12
library/compiler-builtins/examples/intrinsics.rs
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@ -5,14 +5,13 @@
#![allow(unused_features)]
#![allow(internal_features)]
#![cfg_attr(thumb, no_main)]
#![deny(dead_code)]
#![feature(allocator_api)]
#![feature(f128)]
#![feature(f16)]
#![feature(lang_items)]
#![feature(start)]
#![no_std]
#![no_main]
extern crate panic_handler;
@ -630,11 +629,10 @@ fn run() {
extern "C" {
fn rust_begin_unwind(x: usize);
}
// if bb(false) {
unsafe {
rust_begin_unwind(0);
}
// }
}
fn something_with_a_dtor(f: &dyn Fn()) {
@ -649,15 +647,15 @@ fn something_with_a_dtor(f: &dyn Fn()) {
f();
}
#[no_mangle]
#[cfg(not(thumb))]
#[start]
fn main(_: isize, _: *const *const u8) -> isize {
fn main(_argc: core::ffi::c_int, _argv: *const *const u8) -> core::ffi::c_int {
run();
0
}
#[cfg(thumb)]
#[no_mangle]
#[cfg(thumb)]
pub fn _start() -> ! {
run();
loop {}