95 lines
2.9 KiB
Plaintext
95 lines
2.9 KiB
Plaintext
# Copyright 2022 The Pigweed Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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import("//build_overrides/pigweed.gni")
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import("$dir_pw_build/error.gni")
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import("$dir_pw_build/facade.gni")
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import("$dir_pw_build/target_types.gni")
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import("$dir_pw_docgen/docs.gni")
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import("backend.gni")
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config("public_include_path") {
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include_dirs = [ "public" ]
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}
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config("backend_config") {
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include_dirs = [ "public_overrides" ]
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}
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# This source set only provides pw_log's backend interface by invoking the
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# :handler facade.
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pw_source_set("pw_log_string") {
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public_configs = [
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":backend_config",
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":public_include_path",
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]
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public = [
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"public/pw_log_string/log_string.h",
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"public_overrides/pw_log_backend/log_backend.h",
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]
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public_deps = [
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":handler",
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"$dir_pw_preprocessor",
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]
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}
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pw_source_set("pw_log_string.impl") {
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deps = [ ":handler.impl" ]
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}
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# This facade is a C API for string based logging which may be used to back
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# pw_log or for example to mix tokenized and string based logging.
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pw_facade("handler") {
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backend = pw_log_string_HANDLER_BACKEND
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public_configs = [ ":public_include_path" ]
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public = [ "public/pw_log_string/handler.h" ]
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public_deps = [ "$dir_pw_preprocessor" ]
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sources = [ "handler.cc" ]
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require_link_deps = [ ":handler.impl" ]
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}
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# Logging is low-level and ubiquitous. Because of this, it can often cause
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# circular dependencies. This target collects dependencies from the backend that
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# cannot be used because they would cause circular deps.
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#
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# This group ("$dir_pw_log_string:handler_impl") must be listed in
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# pw_build_LINK_DEPS if pw_log_string_HANDLER_BACKEND is set.
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#
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# pw_log_string:handler backends must provide their own "impl" target that
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# collects their actual dependencies. The backend "impl" group may be empty
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# if everything can go directly in the backend target without causing circular
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# dependencies.
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if (pw_log_string_HANDLER_BACKEND != "") {
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pw_source_set("handler.impl") {
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deps = [ get_label_info(pw_log_string_HANDLER_BACKEND,
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"label_no_toolchain") + ".impl" ]
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}
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} else {
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pw_error("handler.impl") {
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message =
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string_join(" ",
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[
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"To use pw_log_string:handler, please direct",
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"pw_log_string_HANDLER_BACKEND to the source set that",
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"implements the C API.",
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])
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}
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}
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pw_doc_group("docs") {
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sources = [ "docs.rst" ]
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}
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