From a8f67dacd392f733493e36bb460d52873dc2e799 Mon Sep 17 00:00:00 2001
From: Corwin Kuiper <corwin@kuiper.dev>
Date: Sun, 1 Aug 2021 18:02:52 +0100
Subject: [PATCH] error on build fail of mgba

---
 mgba-test-runner/build.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/mgba-test-runner/build.rs b/mgba-test-runner/build.rs
index 29d97b4a..d91ad4e4 100644
--- a/mgba-test-runner/build.rs
+++ b/mgba-test-runner/build.rs
@@ -5,12 +5,18 @@ const MGBA_VERSION: &str = "0.9.1";
 fn main() {
     let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
     let mgba_directory = out_path.join(format!("mgba-{}", MGBA_VERSION));
-    std::process::Command::new("bash")
+    let out = std::process::Command::new("bash")
         .arg("build-mgba.sh")
         .arg(MGBA_VERSION)
         .arg(&out_path)
         .output()
         .expect("should be able to build mgba");
+    if !out.status.success() {
+        panic!(
+            "failed to build mgba!\n{}",
+            String::from_utf8_lossy(&out.stderr),
+        );
+    }
     println!("cargo:rustc-link-search={}", out_path.to_str().unwrap());
     println!("cargo:rustc-link-lib=static={}", "mgba-cycle");
     println!("cargo:rustc-link-lib=elf");