From f9d7fb3b7d85216f5a9e0b39812cb0a16d60a9cf Mon Sep 17 00:00:00 2001
From: Paul Osborne <paul.osborne@fastly.com>
Date: Wed, 5 Nov 2025 11:46:15 -0600
Subject: [PATCH] Target stable asm! and set MSRV

On non-nightly compilers, the precision crate code continued
to fallback on the C version; Inline assembly has been stable
for some time now, so target it and set the MSRV to 1.59.
---
 Cargo.toml | 2 +-
 build.rs   | 6 +-----
 src/lib.rs | 2 --
 3 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 29f5b16..738ccb5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,7 @@ homepage = "https://github.com/jedisct1/rust-precision"
 repository = "https://github.com/jedisct1/rust-precision"
 description = "Low overhead, high precision measurement crate"
 edition = "2018"
+rust-version = "1.59.0"  # inline assembly stabilized
 
 [target.'cfg(not(any(target_arch = "wasm32", target_arch = "wasm64")))'.dependencies]
 libc = "0.2"
@@ -23,7 +24,6 @@ wasm-bindgen = "0.2"
 
 [target.'cfg(not(any(target_arch = "wasm32", target_arch = "wasm64")))'.build-dependencies]
 cc = "1"
-rustc_version = "0.4"
 
 [features]
 wasi-abi2 = ["dep:wasi-abi2"]
diff --git a/build.rs b/build.rs
index 2f64d55..92a951f 100644
--- a/build.rs
+++ b/build.rs
@@ -1,16 +1,12 @@
-#[cfg(not(any(target_arch = "wasm32", target_arch = "wasm64")))]
-use rustc_version::{version_meta, Channel};
-
 #[cfg(not(any(target_arch = "wasm32", target_arch = "wasm64")))]
 fn asm_detect() {
-    let using_nightly = version_meta().unwrap().channel == Channel::Nightly;
     let asm_capable_target = cfg!(any(
         target_arch = "x86",
         target_arch = "x86_64",
         target_arch = "aarch64",
         target_arch = "riscv64",
     ));
-    if using_nightly && asm_capable_target {
+    if asm_capable_target {
         println!("cargo:rustc-cfg=asm");
     } else {
         cc::Build::new()
diff --git a/src/lib.rs b/src/lib.rs
index 7891e48..2c33a72 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,4 @@
 #![doc = include_str!("../README.md")]
-#![allow(stable_features)]
-#![cfg_attr(asm, feature(asm))]
 
 mod config;
 mod cpucounter;