Include env-dep:RUSTC_BOOTSTRAP in dep-info for sccache

dtolnay · Jan 2, 2024 · 68846e3 · 68846e3
1 parent 4dce5d7
commit 68846e3
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Showing 2 changed files with 4 additions and 1 deletion.
diff --git a/build.rs b/build.rs
@@ -156,7 +156,7 @@ fn compile_probe(rustc_bootstrap: bool) -> bool {
         .arg("--edition=2021")
         .arg("--crate-name=proc_macro2")
         .arg("--crate-type=lib")
-        .arg("--emit=metadata")
+        .arg("--emit=dep-info,metadata")
         .arg("--out-dir")
         .arg(out_dir)
         .arg(probefile);

diff --git a/build/probe.rs b/build/probe.rs
@@ -16,3 +16,6 @@ pub fn join(this: &Span, other: Span) -> Option<Span> {
 pub fn subspan<R: RangeBounds<usize>>(this: &Literal, range: R) -> Option<Span> {
     this.subspan(range)
 }
+
+// Include in sccache cache key.
+const _: Option<&str> = option_env!("RUSTC_BOOTSTRAP");