1 files changed, 5 insertions, 1 deletions
diff --git a/clang/lib/Frontend/FrontendAction.cpp b/clang/lib/Frontend/FrontendAction.cpp
index 6b1f636..68c70dd 100644
--- a/clang/lib/Frontend/FrontendAction.cpp
+++ b/clang/lib/Frontend/FrontendAction.cpp
@@ -413,7 +413,11 @@ static std::error_code collectModuleHeaderIncludes(
 
     // Sort header paths and make the header inclusion order deterministic
     // across different OSs and filesystems.
-    llvm::sort(Headers.begin(), Headers.end(), llvm::less_first());
+    llvm::sort(Headers.begin(), Headers.end(), [](
+      const std::pair<std::string, const FileEntry *> &LHS,
+      const std::pair<std::string, const FileEntry *> &RHS) {
+        return LHS.first < RHS.first;
+    });
     for (auto &H : Headers) {
       // Include this header as part of the umbrella directory.
       Module->addTopHeader(H.second);