1 files changed, 21 insertions, 0 deletions
diff --git a/third_party/rust/error-chain/build.rs b/third_party/rust/error-chain/build.rs
new file mode 100644
index 0000000000..612f2091de
--- /dev/null
+++ b/third_party/rust/error-chain/build.rs
@@ -0,0 +1,21 @@
+extern crate version_check;
+
+use std::env;
+use version_check::is_min_version;
+
+fn main() {
+    // Switch on for versions that have Error::source
+    // As introduced by https://github.com/rust-lang/rust/pull/53533
+    if is_min_version("1.30").unwrap_or(false) {
+        println!("cargo:rustc-cfg=has_error_source");
+    }
+
+    if is_min_version("1.42").unwrap_or(false) {
+        println!("cargo:rustc-cfg=has_error_description_deprecated");
+    }
+
+    // So we can get the build profile for has_backtrace_depending_on_env test
+    if let Ok(profile) = env::var("PROFILE") {
+        println!("cargo:rustc-cfg=build={:?}", profile);
+    }
+}