global: per crate build.rs

crates/brk_store/Cargo.toml

@@ -8,7 +8,7 @@ edition.workspace = true
 license.workspace = true
 homepage.workspace = true
 repository.workspace = true
-build = "../../build.rs"
+build = "build.rs"
 
 [dependencies]
 brk_error = { workspace = true }

crates/brk_store/build.rs

@@ -0,0 +1,8 @@
+fn main() {
+    let profile = std::env::var("PROFILE").unwrap_or_default();
+
+    if profile == "release" {
+        println!("cargo:rustc-flag=-C");
+        println!("cargo:rustc-flag=target-cpu=native");
+    }
+}