Merge pull request #310 from dtolnay/docsrs

Work around doc build failure due to docs.rs flags change
dtolnay · Dec 14, 2021 · d8c0371 · d8c0371
2 parents 4ca16a0 + 1385671
commit d8c0371
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/build.rs b/build.rs
@@ -58,7 +58,8 @@ fn main() {
         process::exit(1);
     }
 
-    let semver_exempt = cfg!(procmacro2_semver_exempt);
+    let docs_rs = env::var_os("DOCS_RS").is_some();
+    let semver_exempt = cfg!(procmacro2_semver_exempt) || docs_rs;
     if semver_exempt {
         // https://github.com/dtolnay/proc-macro2/issues/147
         println!("cargo:rustc-cfg=procmacro2_semver_exempt");