Cannot compile with thin-lto on MinGW

[clubby789]

This is a rustc issue, but I thought it might help to be aware of this 🙂
memchr@2.6.0+ does not link when using thin-lto on MinGW, due to the use of #[inline] on functions containing statics. The error this causes when using 2.6+ as a dependency of rustc std can be seen here

memchr/src/arch/x86_64/memchr.rs

Lines 173 to 180 in cedf318

	#[inline(always)]
	pub(crate) fn memchr_raw(
	n1: u8,
	start: *const u8,
	end: *const u8,
	) -> Option<*const u8> {
	// SAFETY: We provide a valid function pointer type.
	unsafe_ifunc!(

memchr/src/arch/x86_64/memchr.rs

Line 74 in cedf318

static FN: AtomicPtr<()> = AtomicPtr::new(detect as Fn);

[BurntSushi]

Yeah I'm aware. If there's a simple patch to fix this, I'd accept it, but I otherwise don't think it's worth tracking here since it's already tracked on rustc.