# 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.
def cxx_toolchain_macro_impl(cxx_toolchain_rule = None, **kwargs):
# `generate_linker_maps` set in order of priority:
# - Explicit attribute on the cxx_toolchain() target
# - Constraint on the target platform
# - `cxx.linker_map_enabled` buckconfig
if "generate_linker_maps" not in kwargs:
linker_map_enabled = (read_root_config("cxx", "linker_map_enabled", "").lower() == "true")
kwargs["generate_linker_maps"] = select({
"DEFAULT": linker_map_enabled,
"config//linker/constraints:generate_linker_maps_disabled": False,
"config//linker/constraints:generate_linker_maps_enabled": True,
})
bitcode = read_root_config("cxx", "bitcode")
if bitcode != None:
if bitcode.lower() == "false":
kwargs["object_format"] = "native"
elif bitcode.lower() == "true":
kwargs["object_format"] = "bitcode"
elif bitcode.lower() == "embed":
kwargs["object_format"] = "embedded-bitcode"
else:
kwargs["object_format"] = "native"
cxx_toolchain_rule(
**kwargs
)