fix(codspeed): use target_os cfg

Author: not-matthias

crates/codspeed/build.rs

@@ -1,6 +1,11 @@
 use std::{env, path::PathBuf};
 
 fn main() {
+    if cfg!(not(target_os = "linux")) {
+        // The instrument-hooks library is only supported on Linux.
+        return;
+    }
+
     // Compile the C library
     cc::Build::new()
         .file("instrument-hooks/dist/core.c")

crates/codspeed/src/instrument_hooks/mod.rs

@@ -1,8 +1,8 @@
-#[cfg(unix)]
+#[cfg(target_os = "linux")]
 mod ffi;
 
-#[cfg(unix)]
-mod unix_impl {
+#[cfg(target_os = "linux")]
+mod linux_impl {
     use nix::sys::time::TimeValLike;
 
     use super::ffi;
@@ -131,7 +131,7 @@ mod unix_impl {
     }
 }
 
-#[cfg(not(unix))]
+#[cfg(not(target_os = "linux"))]
 mod other_impl {
     pub struct InstrumentHooks;
 
@@ -169,10 +169,10 @@ mod other_impl {
     }
 }
 
-#[cfg(unix)]
-pub use unix_impl::InstrumentHooks;
+#[cfg(target_os = "linux")]
+pub use linux_impl::InstrumentHooks;
 
-#[cfg(not(unix))]
+#[cfg(not(target_os = "linux"))]
 pub use other_impl::InstrumentHooks;
 
 #[cfg(test)]