diff --git a/libcxx/test/libcxx/vendor/llvm/system-install-properties-darwin.sh.cpp b/libcxx/test/libcxx/vendor/llvm/system-install-properties-darwin.sh.cpp
new file mode 100644
index 0000000000000..757bf89c17e9a
--- /dev/null
+++ b/libcxx/test/libcxx/vendor/llvm/system-install-properties-darwin.sh.cpp
@@ -0,0 +1,27 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// REQUIRES: darwin
+// REQUIRES: stdlib=libc++ && !stdlib=apple-libc++
+
+// This file checks various properties of the installation of libc++ when built under
+// a vanilla upstream configuration on Darwin platforms.
+
+// Make sure we install the libc++ headers in the right location.
+//
+// RUN: stat "%{include-dir}/__config"
+
+// Make sure we install libc++.1.dylib and libc++experimental.a in the right location.
+//
+// RUN: stat "%{lib-dir}/libc++.1.dylib"
+// RUN: stat "%{lib-dir}/libc++experimental.a"
+
+// Make sure we install a symlink from libc++.dylib to libc++.1.dylib.
+//
+// RUN: stat "%{lib-dir}/libc++.dylib"
+// RUN: readlink "%{lib-dir}/libc++.dylib" | grep "libc++.1.dylib"
diff --git a/libcxx/test/libcxx/vendor/llvm/system-install-properties-linux.sh.cpp b/libcxx/test/libcxx/vendor/llvm/system-install-properties-linux.sh.cpp
new file mode 100644
index 0000000000000..05ccae9881a85
--- /dev/null
+++ b/libcxx/test/libcxx/vendor/llvm/system-install-properties-linux.sh.cpp
@@ -0,0 +1,32 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// REQUIRES: linux
+// REQUIRES: stdlib=libc++ && !stdlib=apple-libc++
+
+// This file checks various properties of the installation of libc++ when built under
+// a vanilla upstream configuration on Linux platforms.
+
+// Make sure we install the libc++ headers in the right location.
+//
+// RUN: stat "%{include-dir}/__config"
+
+// Make sure we install libc++.so.1.0 and libc++experimental.a in the right location.
+//
+// RUN: stat "%{lib-dir}/libc++.so.1.0"
+// RUN: stat "%{lib-dir}/libc++experimental.a"
+
+// Make sure we install a symlink from libc++.so.1 to libc++.so.1.0.
+//
+// RUN: stat "%{lib-dir}/libc++.so.1"
+// RUN: readlink "%{lib-dir}/libc++.so.1" | grep "libc++.so.1.0"
+
+// Make sure we install libc++.so in the right location. That may be a symlink or
+// a linker script, so we don't check anything specific about that file.
+//
+// RUN: stat "%{lib-dir}/libc++.so"
diff --git a/libcxxabi/test/vendor/llvm/system-install-properties-darwin.sh.cpp b/libcxxabi/test/vendor/llvm/system-install-properties-darwin.sh.cpp
new file mode 100644
index 0000000000000..9c85aa907e594
--- /dev/null
+++ b/libcxxabi/test/vendor/llvm/system-install-properties-darwin.sh.cpp
@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// REQUIRES: darwin
+// REQUIRES: stdlib=libc++ && !stdlib=apple-libc++
+
+// This file checks various properties of the installation of libc++abi when built under
+// a vanilla upstream configuration on Darwin platforms.
+
+// Make sure we install the libc++abi headers in the right location.
+//
+// RUN: stat "%{include}/cxxabi.h"
+
+// Make sure we install libc++abi.1.dylib in the right location.
+//
+// RUN: stat "%{lib}/libc++abi.1.dylib"
+
+// Make sure we install a symlink from libc++abi.dylib to libc++abi.1.dylib.
+//
+// RUN: stat "%{lib-dir}/libc++abi.dylib"
+// RUN: readlink "%{lib-dir}/libc++abi.dylib" | grep "libc++abi.1.dylib"
diff --git a/libcxxabi/test/vendor/llvm/system-install-properties-linux.sh.cpp b/libcxxabi/test/vendor/llvm/system-install-properties-linux.sh.cpp
new file mode 100644
index 0000000000000..f144b21462303
--- /dev/null
+++ b/libcxxabi/test/vendor/llvm/system-install-properties-linux.sh.cpp
@@ -0,0 +1,31 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// REQUIRES: linux
+// REQUIRES: stdlib=libc++ && !stdlib=apple-libc++
+
+// This file checks various properties of the installation of libc++abi when built under
+// a vanilla upstream configuration on Linux platforms.
+
+// Make sure we install the libc++abi headers in the right location.
+//
+// RUN: stat "%{include}/cxxabi.h"
+
+// Make sure we install libc++abi.so.1.0 in the right location.
+//
+// RUN: stat "%{lib}/libc++abi.so.1.0"
+
+// Make sure we install a symlink from libc++abi.so.1 to libc++abi.so.1.0.
+//
+// RUN: stat "%{lib}/libc++abi.so.1"
+// RUN: readlink "%{lib}/libc++abi.so.1" | grep "libc++abi.so.1.0"
+
+// Make sure we install a symlink from libc++abi.so to libc++abi.so.1.
+//
+// RUN: stat "%{lib}/libc++abi.so"
+// RUN: readlink "%{lib}/libc++abi.so" | grep "libc++abi.so.1"