1 files changed, 62 insertions, 0 deletions
diff --git a/contrib/llvm-project/lld/lib/ReaderWriter/MachO/FlatNamespaceFile.h b/contrib/llvm-project/lld/lib/ReaderWriter/MachO/FlatNamespaceFile.h
new file mode 100644
index 000000000000..1885effef49f
--- /dev/null
+++ b/contrib/llvm-project/lld/lib/ReaderWriter/MachO/FlatNamespaceFile.h
@@ -0,0 +1,62 @@
+//===- lib/ReaderWriter/MachO/FlatNamespaceFile.h -------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
+#define LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H
+
+#include "Atoms.h"
+#include "lld/Core/SharedLibraryFile.h"
+#include "lld/ReaderWriter/MachOLinkingContext.h"
+#include "llvm/Support/Debug.h"
+
+namespace lld {
+namespace mach_o {
+
+//
+// A FlateNamespaceFile instance may be added as a resolution source of last
+// resort, depending on how -flat_namespace and -undefined are set.
+//
+class FlatNamespaceFile : public SharedLibraryFile {
+public:
+  FlatNamespaceFile(const MachOLinkingContext &context)
+    : SharedLibraryFile("flat namespace") { }
+
+  OwningAtomPtr<SharedLibraryAtom> exports(StringRef name) const override {
+    return new (allocator()) MachOSharedLibraryAtom(*this, name, getDSOName(),
+                                                    false);
+  }
+
+  StringRef getDSOName() const override { return "flat-namespace"; }
+
+  const AtomRange<DefinedAtom> defined() const override {
+    return _noDefinedAtoms;
+  }
+  const AtomRange<UndefinedAtom> undefined() const override {
+    return _noUndefinedAtoms;
+  }
+
+  const AtomRange<SharedLibraryAtom> sharedLibrary() const override {
+    return _noSharedLibraryAtoms;
+  }
+
+  const AtomRange<AbsoluteAtom> absolute() const override {
+    return _noAbsoluteAtoms;
+  }
+
+  void clearAtoms() override {
+    _noDefinedAtoms.clear();
+    _noUndefinedAtoms.clear();
+    _noSharedLibraryAtoms.clear();
+    _noAbsoluteAtoms.clear();
+  }
+};
+
+} // namespace mach_o
+} // namespace lld
+
+#endif // LLD_READER_WRITER_MACHO_FLAT_NAMESPACE_FILE_H