From 9ddba6768201e3cbffe8e5fc8b7353e4f48dfda4 Mon Sep 17 00:00:00 2001
From: Wenfeng Wang <kalot.wang@gmail.com>
Date: Fri, 16 Aug 2024 03:16:16 +0000
Subject: [PATCH] set default value of env TARGET_CC

---
 methods/build.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/methods/build.rs b/methods/build.rs
index 11130e5..ef087eb 100644
--- a/methods/build.rs
+++ b/methods/build.rs
@@ -22,6 +22,11 @@ const SOLIDITY_IMAGE_ID_PATH: &str = "../contracts/ImageID.sol";
 const SOLIDITY_ELF_PATH: &str = "../tests/Elf.sol";
 
 fn main() {
+    // If TARGET_CC hasn't been set, set to clang as default
+    if env::var("TARGET_CC").is_err() {
+        env::set_var("TARGET_CC", "clang");
+    }
+
     // Builds can be made deterministic, and thereby reproducible, by using Docker to build the
     // guest. Check the RISC0_USE_DOCKER variable and use Docker to build the guest if set.
     let use_docker = env::var("RISC0_USE_DOCKER").ok().map(|_| DockerOptions {