1 files changed, 16 insertions, 0 deletions
diff --git a/crates/parser/build.rs b/crates/parser/build.rs
new file mode 100644
index 0000000..d5c6dec
--- /dev/null
+++ b/crates/parser/build.rs
@@ -0,0 +1,16 @@
+use std::env;
+
+fn main() {
+    println!("cargo::rustc-check-cfg=cfg(parallel_parser)");
+
+    if env::var("CARGO_FEATURE_PARALLEL").is_err() {
+        return;
+    }
+
+    let arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap_or_default();
+    let os = env::var("CARGO_CFG_TARGET_OS").unwrap_or_default();
+
+    if !arch.starts_with("wasm") && os != "unknown" && os != "none" {
+        println!("cargo:rustc-cfg=parallel_parser");
+    }
+}