From 3a75b26488fd616c9771f2599f7bd4925da8e287 Mon Sep 17 00:00:00 2001
From: Xavier Lau <xavier@inv.cafe>
Date: Mon, 22 May 2023 19:30:46 +0800
Subject: [PATCH] Companion of paritytech/cumulus#2308

---
 runtime/crab/build.rs     | 4 ++++
 runtime/darwinia/build.rs | 4 ++++
 runtime/pangolin/build.rs | 4 ++++
 runtime/pangoro/build.rs  | 4 ++++
 4 files changed, 16 insertions(+)

diff --git a/runtime/crab/build.rs b/runtime/crab/build.rs
index 4a1101a97..05785b550 100644
--- a/runtime/crab/build.rs
+++ b/runtime/crab/build.rs
@@ -19,6 +19,10 @@
 // crates.io
 use substrate_wasm_builder::WasmBuilder;
 
+#[cfg(feature = "std")]
 fn main() {
 	WasmBuilder::new().with_current_project().export_heap_base().import_memory().build()
 }
+
+#[cfg(not(feature = "std"))]
+fn main() {}
diff --git a/runtime/darwinia/build.rs b/runtime/darwinia/build.rs
index 4a1101a97..05785b550 100644
--- a/runtime/darwinia/build.rs
+++ b/runtime/darwinia/build.rs
@@ -19,6 +19,10 @@
 // crates.io
 use substrate_wasm_builder::WasmBuilder;
 
+#[cfg(feature = "std")]
 fn main() {
 	WasmBuilder::new().with_current_project().export_heap_base().import_memory().build()
 }
+
+#[cfg(not(feature = "std"))]
+fn main() {}
diff --git a/runtime/pangolin/build.rs b/runtime/pangolin/build.rs
index 4a1101a97..05785b550 100644
--- a/runtime/pangolin/build.rs
+++ b/runtime/pangolin/build.rs
@@ -19,6 +19,10 @@
 // crates.io
 use substrate_wasm_builder::WasmBuilder;
 
+#[cfg(feature = "std")]
 fn main() {
 	WasmBuilder::new().with_current_project().export_heap_base().import_memory().build()
 }
+
+#[cfg(not(feature = "std"))]
+fn main() {}
diff --git a/runtime/pangoro/build.rs b/runtime/pangoro/build.rs
index 4a1101a97..05785b550 100644
--- a/runtime/pangoro/build.rs
+++ b/runtime/pangoro/build.rs
@@ -19,6 +19,10 @@
 // crates.io
 use substrate_wasm_builder::WasmBuilder;
 
+#[cfg(feature = "std")]
 fn main() {
 	WasmBuilder::new().with_current_project().export_heap_base().import_memory().build()
 }
+
+#[cfg(not(feature = "std"))]
+fn main() {}