| # Copyright 2020 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. |
| |
| import("//build_overrides/pigweed.gni") |
| |
| import("$dir_pw_build/python.gni") |
| import("$dir_pw_build/relative_source_file_names.gni") |
| import("$dir_pw_docgen/docs.gni") |
| import("target_types.gni") |
| |
| # IMPORTANT: The compilation flags in this file must be kept in sync with |
| # the CMake flags pw_build/CMakeLists.txt. |
| |
| config("colorize_output") { |
| cflags = [ |
| # Colorize output. Ninja's Clang invocation disables color by default. |
| "-fdiagnostics-color", |
| ] |
| ldflags = cflags |
| } |
| |
| config("debugging") { |
| # Enable debug symbol generation. This has no effect on final code size. |
| cflags = [ "-g" ] |
| } |
| |
| config("extra_debugging") { |
| # Include things like macro expansion in debug info. |
| cflags = [ "-g3" ] |
| } |
| |
| # Optimization levels |
| config("optimize_debugging") { |
| cflags = [ "-Og" ] |
| ldflags = cflags |
| } |
| |
| config("optimize_speed") { |
| cflags = [ "-O2" ] |
| ldflags = cflags |
| } |
| |
| config("optimize_more_speed") { |
| cflags = [ "-O3" ] |
| ldflags = cflags |
| } |
| |
| config("optimize_size") { |
| cflags = [ "-Os" ] |
| ldflags = cflags |
| } |
| |
| # Standard compiler flags to reduce output binary size. |
| config("reduced_size") { |
| cflags = [ |
| "-fno-common", |
| "-fno-exceptions", |
| "-ffunction-sections", |
| "-fdata-sections", |
| ] |
| cflags_cc = [ "-fno-rtti" ] |
| |
| if (current_os == "mac" || current_os == "ios") { |
| # Delete unreferenced sections. Helpful with -ffunction-sections. |
| ldflags = [ "-Wl,-dead_strip" ] |
| } else { |
| # Delete unreferenced sections. Helpful with -ffunction-sections. |
| ldflags = [ "-Wl,--gc-sections" ] |
| } |
| } |
| |
| config("strict_warnings") { |
| cflags = [ |
| "-Wall", |
| "-Wextra", |
| "-Wimplicit-fallthrough", |
| "-Wcast-qual", |
| "-Wundef", |
| "-Wpointer-arith", |
| |
| # Make all warnings errors, except for the exemptions below. |
| "-Werror", |
| "-Wno-error=cpp", # preprocessor #warning statement |
| "-Wno-error=deprecated-declarations", # [[deprecated]] attribute |
| ] |
| cflags_cc = [ "-Wnon-virtual-dtor" ] |
| } |
| |
| # Thread safety warnings are only supported by Clang. |
| config("clang_thread_safety_warnings") { |
| cflags = [ "-Wthread-safety" ] |
| defines = [ "_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS=1" ] |
| } |
| |
| # This config contains warnings that we don't necessarily recommend projects |
| # enable, but are enabled for upstream Pigweed for maximum project |
| # compatibility. |
| config("extra_strict_warnings") { |
| cflags = [ |
| "-Wshadow", |
| "-Wredundant-decls", |
| ] |
| cflags_c = [ "-Wstrict-prototypes" ] |
| } |
| |
| config("cpp14") { |
| cflags_cc = [ "-std=c++14" ] |
| } |
| |
| config("cpp17") { |
| cflags_cc = [ |
| "-std=c++17", |
| |
| # Allow uses of the register keyword, which may appear in C headers. |
| "-Wno-register", |
| ] |
| } |
| |
| # Removes system-dependent prefixes from macros like __FILE__ and debug symbols. |
| config("relative_paths") { |
| _transformations = [ |
| # Remap absolute paths to the build directory to "out", in case absolute |
| # paths to files in the build directory are created. |
| # |
| # Clang and GCC apply these flags in opposite order. The build directory is |
| # often nested under //. To ensure that both compilers removed it before |
| # removing the absolute path to //, apply the option both first and last. |
| rebase_path(root_build_dir) + "=out", |
| |
| # Remove absolute paths to the repo root. |
| rebase_path("//") + "=", |
| |
| # Remove relative paths from the build directory to the source tree. |
| rebase_path("//", root_build_dir) + "=", |
| |
| # Repeat option to remap absolute paths to the build directory. |
| rebase_path(root_build_dir) + "=out", |
| ] |
| cflags = [] |
| |
| foreach(transform, _transformations) { |
| cflags += [ "-ffile-prefix-map=" + transform ] |
| } |
| |
| # Write the transformations to a well known path so that other utilities |
| # that need to present file names that match the compiler's __FILE__ |
| # macro can apply the same transformation. |
| write_file(pw_build_RELATIVE_PATH_TRANSFORM_JSON, _transformations, "json") |
| } |
| |
| # This group is linked into all pw_executable, pw_static_library, and |
| # pw_shared_library targets. This makes it possible to ensure symbols are |
| # defined without a dependency on them. |
| # |
| # pw_build_LINK_DEPS should only be used when necessary. For example, |
| # pw_assert relies on pw_build_LINK_DEPS to avoid circular dependencies |
| # in GN. In almost all other cases, build targets should explicitly depend on |
| # the other targets they use. |
| group("link_deps") { |
| deps = pw_build_LINK_DEPS |
| } |
| |
| # This empty target is used as the default value for module configurations. |
| # Projects may set pw_build_DEFAULT_MODULE_CONFIG to a different GN target that |
| # overrides modules' configuration options via macro definitions or a header |
| # forcibly included with `-include`. |
| group("empty") { |
| } |
| |
| # Requirements for the pw_python_package lint targets. |
| pw_python_requirements("python_lint") { |
| requirements = [ |
| "build", |
| |
| # NOTE: mypy needs to stay in sync with mypy-protobuf |
| # Currently using mypy 0.910 and mypy-protobuf 2.9 |
| "mypy==0.910", |
| |
| # typeshed packages (required by mypy > 0.9) |
| "types-setuptools", |
| "pylint==2.9.3", |
| ] |
| } |
| |
| pw_doc_group("docs") { |
| sources = [ |
| "docs.rst", |
| "python.rst", |
| ] |
| } |