def _add_args(kwargs, kwarg, value):
    kwargs[kwarg] = kwargs.get(kwarg, []) + value

def _wrap_cc(rule, kwargs):
    _add_args(kwargs, "copts", [
        # Required by LLVM/Swift
        "-fno-rtti",
    ])
    _add_args(kwargs, "features", [
        # temporary, before we do universal merging
        "-universal_binaries",
    ])
    if "target_compatible_with" not in kwargs:
        # Restrict to Linux or macOS by default, but allow overriding
        _add_args(kwargs, "target_compatible_with", select({
            "@platforms//os:linux": [],
            "@platforms//os:macos": [],
            "//conditions:default": ["@platforms//:incompatible"],
        }))
    rule(**kwargs)

def swift_cc_binary(**kwargs):
    _wrap_cc(native.cc_binary, kwargs)

def swift_cc_library(**kwargs):
    _wrap_cc(native.cc_library, kwargs)