Vendor dependencies

Let's see how I like this workflow.

vendor/cxx/tools/buck/prelude/linking/strip.bzl

@@ -0,0 +1,35 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+
+load("@prelude//cxx:cxx_context.bzl", "get_cxx_toolchain_info")
+
+def strip_debug_info(ctx: "context", name: str.type, obj: "artifact") -> "artifact":
+    """
+    Strip debug information from an object.
+    """
+    strip = get_cxx_toolchain_info(ctx).binary_utilities_info.strip
+    output = ctx.actions.declare_output(name)
+    cmd = cmd_args([strip, "-S", "-o", output.as_output(), obj])
+    ctx.actions.run(cmd, category = "strip_debug", identifier = name)
+    return output
+
+def strip_shared_library(ctx: "context", cxx_toolchain: "CxxToolchainInfo", shared_lib: "artifact", strip_flags: "cmd_args") -> "artifact":
+    """
+    Strip unneeded information from a shared library.
+    """
+    strip = cxx_toolchain.binary_utilities_info.strip
+    stripped_lib = ctx.actions.declare_output("stripped/{}".format(shared_lib.short_path))
+
+    # TODO(T109996375) support configuring the flags used for stripping
+    cmd = cmd_args()
+    cmd.add(strip)
+    cmd.add(strip_flags)
+    cmd.add([shared_lib, "-o", stripped_lib.as_output()])
+
+    ctx.actions.run(cmd, category = "strip_shared_lib", identifier = shared_lib.short_path)
+
+    return stripped_lib