From 0a91f2ba2b3019da37de343d997dbd19dbd53bc6 Mon Sep 17 00:00:00 2001
From: Kirill Fomichev <fanatid@ya.ru>
Date: Mon, 8 Mar 2021 16:37:18 +0300
Subject: [PATCH] Use CARGO_CFG_TARGET_ARCH instead TARGET in build.rs

---
 secp256k1-sys/build.rs | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/secp256k1-sys/build.rs b/secp256k1-sys/build.rs
index 1bb869d..26869d9 100644
--- a/secp256k1-sys/build.rs
+++ b/secp256k1-sys/build.rs
@@ -51,10 +51,9 @@ fn main() {
     #[cfg(feature = "recovery")]
     base_config.define("ENABLE_MODULE_RECOVERY", Some("1"));
 
-    match &env::var("TARGET").unwrap() as &str {
-        "wasm32-unknown-unknown"|"wasm32-wasi" =>
-            { base_config.include("wasm-sysroot"); },
-        _ => {},
+    // Header files. WASM only.
+    if env::var("CARGO_CFG_TARGET_ARCH").unwrap() == "wasm32" {
+        base_config.include("wasm-sysroot");
     }
 
     // secp256k1