blob: 46d81a41f68e7f992193ae20bc23f71c87854d8c [file] [log] [blame]
# Copyright 2021 The Pigweed Authors
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
# Declares a group that builds a list of dependencies using multiple toolchains.
# In a multi-toolchain group, each dependency is built with each of the provided
# toolchains. This results in M x N targets being built, where M is the number
# of toolchains, and N is the number of targets listed in the `deps` variable.
# This template is useful for simplifying cases where you have multiple
# applications you would like to build under different toolchain contexts.
# Args:
# deps: (required) List of GN targets to build under each listed toolchain.
# toolchains: (required) A list of toolchain labels to build the dependencies
# with.
template("pw_multi_toolchain_group") {
"Use `deps` for pw_multi_toolchain_group targets")
assert(defined(invoker.deps), "`deps` must be defined to use this template")
"`toolchains` must be defined to use this template")
group(target_name) {
deps = []
public_deps = []
foreach(tc, invoker.toolchains) {
foreach(item, invoker.deps) {
# Make sure targets don't explicitly reference a toolchain in their
# target label. If we poison any instances of "(", we can see a mismatch
# against the original string, indicating a toolchain was explicitly
# specified.
_poisioned_label = string_replace(item, "(", "!")
assert(item == _poisioned_label,
"$item can't explicitly specify a toolchain as part of " +
"a multi-toolchain group")
deps += [ "$item($tc)" ]