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-rw-r--r--src/bootstrap/src/core/build_steps/dist.rs14
1 files changed, 14 insertions, 0 deletions
diff --git a/src/bootstrap/src/core/build_steps/dist.rs b/src/bootstrap/src/core/build_steps/dist.rs
index 3fbc8cdbcd5..2c3fb9458ef 100644
--- a/src/bootstrap/src/core/build_steps/dist.rs
+++ b/src/bootstrap/src/core/build_steps/dist.rs
@@ -925,6 +925,8 @@ fn copy_src_dirs(
             "llvm-project\\cmake",
             "llvm-project/runtimes",
             "llvm-project\\runtimes",
+            "llvm-project/third-party",
+            "llvm-project\\third-party",
         ];
         if spath.contains("llvm-project")
             && !spath.ends_with("llvm-project")
@@ -933,6 +935,18 @@ fn copy_src_dirs(
             return false;
         }
 
+        // Keep only these third party libraries
+        const LLVM_THIRD_PARTY: &[&str] =
+            &["llvm-project/third-party/siphash", "llvm-project\\third-party\\siphash"];
+        if (spath.starts_with("llvm-project/third-party")
+            || spath.starts_with("llvm-project\\third-party"))
+            && !(spath.ends_with("llvm-project/third-party")
+                || spath.ends_with("llvm-project\\third-party"))
+            && !LLVM_THIRD_PARTY.iter().any(|path| spath.contains(path))
+        {
+            return false;
+        }
+
         const LLVM_TEST: &[&str] = &["llvm-project/llvm/test", "llvm-project\\llvm\\test"];
         if LLVM_TEST.iter().any(|path| spath.contains(path))
             && (spath.ends_with(".ll") || spath.ends_with(".td") || spath.ends_with(".s"))