| #!/usr/bin/env python3 |
| |
| # Copyright 2022 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 |
| # |
| # https://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # 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. |
| """ An internal set of tools for creating embedded CC targets. """ |
| |
| load("@bazel_tools//tools/cpp:toolchain_utils.bzl", "find_cpp_toolchain") |
| |
| def _print_platform_impl(_, ctx): |
| if hasattr(ctx.rule.attr, "constraint_values"): |
| for cv in ctx.rule.attr.constraint_values: |
| # buildifier: disable=print |
| print(str(ctx.rule.attr.name) + " specifies " + str(cv)) |
| return [] |
| |
| print_platform = aspect( |
| implementation = _print_platform_impl, |
| attr_aspects = ["parents"], |
| doc = """ |
| This is a little debug utility that traverses the platform inheritance |
| hierarchy and prints all the constraint values. |
| |
| Example usage: |
| |
| bazel build \ |
| //pw_build/platforms:lm3s6965evb \ |
| --aspects \ |
| pw_build/bazel_internal/pigweed_internal.bzl%print_platform |
| """, |
| ) |
| |
| def compile_cc( |
| ctx, |
| srcs, |
| hdrs, |
| deps, |
| includes = [], |
| defines = [], |
| user_compile_flags = []): |
| """Compiles a list C++ source files. |
| |
| Args: |
| ctx: Rule context |
| srcs: List of C/C++ source files to compile |
| hdrs: List of C/C++ header files to compile with |
| deps: Dependencies to link with |
| includes: List of include paths |
| defines: List of preprocessor defines to use |
| user_compile_flags: Extra compiler flags to pass when compiling. |
| |
| Returns: |
| A CcInfo provider. |
| """ |
| cc_toolchain = find_cpp_toolchain(ctx) |
| feature_configuration = cc_common.configure_features( |
| ctx = ctx, |
| cc_toolchain = cc_toolchain, |
| requested_features = ctx.features, |
| unsupported_features = ctx.disabled_features, |
| ) |
| |
| compilation_contexts = [dep[CcInfo].compilation_context for dep in deps] |
| compilation_context, compilation_outputs = cc_common.compile( |
| name = ctx.label.name, |
| actions = ctx.actions, |
| feature_configuration = feature_configuration, |
| cc_toolchain = cc_toolchain, |
| srcs = srcs, |
| includes = includes, |
| defines = defines, |
| public_hdrs = hdrs, |
| user_compile_flags = user_compile_flags, |
| compilation_contexts = compilation_contexts, |
| ) |
| |
| linking_contexts = [dep[CcInfo].linking_context for dep in deps] |
| linking_context, _ = cc_common.create_linking_context_from_compilation_outputs( |
| actions = ctx.actions, |
| feature_configuration = feature_configuration, |
| cc_toolchain = cc_toolchain, |
| compilation_outputs = compilation_outputs, |
| linking_contexts = linking_contexts, |
| disallow_dynamic_library = True, |
| name = ctx.label.name, |
| ) |
| |
| transitive_output_files = [dep[DefaultInfo].files for dep in deps] |
| output_files = depset( |
| compilation_outputs.pic_objects + compilation_outputs.objects, |
| transitive = transitive_output_files, |
| ) |
| return [DefaultInfo(files = output_files), CcInfo( |
| compilation_context = compilation_context, |
| linking_context = linking_context, |
| )] |