| load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES") |
| load("@soong_injection//cc_toolchain:constants.bzl", _generated_constants = "constants") |
| |
| # This file uses structs to organize and control the visibility of symbols. |
| |
| # Handcrafted default flags. |
| flags = struct( |
| # ============= |
| # Compiler flags |
| # ============= |
| compiler_flags = [ |
| "-fPIC", |
| ], |
| asm_compiler_flags = [ |
| "-D__ASSEMBLY__", |
| ], |
| # ============ |
| # Linker flags |
| # ============ |
| bionic_linker_flags = [ |
| # These are the linker flags for OSes that use Bionic: LinuxBionic, Android |
| "-nostdlib", |
| "-Wl,--gc-sections", |
| ], |
| bionic_static_executable_linker_flags = [ |
| "-Bstatic", |
| ], |
| bionic_dynamic_executable_linker_flags = [ |
| "-pie", |
| "-Bdynamic", |
| "-Wl,-z,nocopyreloc", |
| ], |
| # =========== |
| # Other flags |
| # =========== |
| non_external_defines = [ |
| # These defines should only apply to targets which are not under |
| # @external/. This can be controlled by adding "-non_external_compiler_flags" |
| # to the features list for external/ packages. |
| # This corresponds to special-casing in Soong (see "external/" in build/soong/cc/compiler.go). |
| "-DANDROID_STRICT", |
| ], |
| ) |
| |
| # Generated flags dumped from Soong's cc toolchain code. |
| generated_constants = _generated_constants |
| |
| # The set of C and C++ actions used in the Android build. There are other types |
| # of actions available in ACTION_NAMES, but those are not used in |
| # Android yet. |
| actions = struct( |
| compile = [ |
| ACTION_NAMES.c_compile, |
| ACTION_NAMES.cpp_compile, |
| ACTION_NAMES.assemble, |
| ACTION_NAMES.preprocess_assemble, |
| ], |
| c_compile = ACTION_NAMES.c_compile, |
| cpp_compile = ACTION_NAMES.cpp_compile, |
| # Assembler actions for .s and .S files. |
| assemble = [ |
| ACTION_NAMES.assemble, |
| ACTION_NAMES.preprocess_assemble, |
| ], |
| # Link actions |
| link = [ |
| ACTION_NAMES.cpp_link_executable, |
| ACTION_NAMES.cpp_link_dynamic_library, |
| ACTION_NAMES.cpp_link_nodeps_dynamic_library, |
| ], |
| # Differentiate archive actions from link actions |
| archive = [ |
| ACTION_NAMES.cpp_link_static_library, |
| ], |
| cpp_link_dynamic_library = ACTION_NAMES.cpp_link_dynamic_library, |
| cpp_link_nodeps_dynamic_library = ACTION_NAMES.cpp_link_nodeps_dynamic_library, |
| cpp_link_static_library = ACTION_NAMES.cpp_link_static_library, |
| cpp_link_executable = ACTION_NAMES.cpp_link_executable, |
| strip = ACTION_NAMES.strip, |
| ) |
| |
| bionic_crt = struct( |
| # crtbegin and crtend libraries for compiling cc_library_shared and |
| # cc_binary against the Bionic runtime |
| shared_library_crtbegin = "//bionic/libc:crtbegin_so", |
| shared_library_crtend = "//bionic/libc:crtend_so", |
| shared_binary_crtbegin = "//bionic/libc:crtbegin_dynamic", |
| static_binary_crtbegin = "//bionic/libc:crtbegin_static", |
| binary_crtend = "//bionic/libc:crtend_android", |
| ) |
| |
| default_cpp_std_version = "gnu++17" |
| cpp_std_versions = [ |
| "gnu++98", |
| "gnu++11", |
| "gnu++17", |
| "gnu++2a", |
| "c++98", |
| "c++11", |
| "c++17", |
| "c++2a", |
| ] |
| |
| default_c_std_version = "gnu99" |
| c_std_versions = [ |
| "gnu11", |
| "gnu99", |
| "c11", |
| "c99", |
| ] |
| |
| # Added by linker.go for non-bionic, non-musl, non-windows toolchains. |
| # Should be added to host builds to match the default behavior of device builds. |
| device_compatibility_flags_non_windows = [ |
| "-ldl", |
| "-lpthread", |
| "-lm", |
| ] |
| |
| # Added by linker.go for non-bionic, non-musl, non-darwin toolchains. |
| # Should be added to host builds to match the default behavior of device builds. |
| device_compatibility_flags_non_darwin = ["-lrt"] |
| |
| arches = struct( |
| Arm = "arm", |
| Arm64 = "arm64", |
| X86 = "x86", |
| X86_64 = "x86_64", |
| ) |
| |
| def _variant_combinations(arch_variants = {}, cpu_variants = {}): |
| combinations = [] |
| for arch in arch_variants: |
| if "" not in cpu_variants: |
| combinations.append(struct(arch_variant = arch, cpu_variant = "")) |
| for cpu in cpu_variants: |
| combinations.append(struct(arch_variant = arch, cpu_variant = cpu)) |
| return combinations |
| |
| arch_to_variants = { |
| arches.Arm: _variant_combinations(arch_variants = _generated_constants.ArmArchVariantCflags, cpu_variants = _generated_constants.ArmCpuVariantCflags), |
| arches.Arm64: _variant_combinations(arch_variants = _generated_constants.Arm64ArchVariantCflags, cpu_variants = _generated_constants.Arm64CpuVariantCflags), |
| arches.X86: _variant_combinations(arch_variants = _generated_constants.X86ArchVariantCflags), |
| arches.X86_64: _variant_combinations(arch_variants = _generated_constants.X86_64ArchVariantCflags), |
| } |
| |
| def arm_extra_ldflags(variant): |
| if variant.arch_variant == "armv7-a-neon": |
| if variant.cpu_variant in ("cortex-a8", ""): |
| return _generated_constants.ArmFixCortexA8LdFlags |
| else: |
| return _generated_constants.ArmNoFixCortexA8LdFlags |
| elif variant.arch_variant == "armv7-a": |
| return _generated_constants.ArmFixCortexA8LdFlags |
| return [] |
| |
| # enabled_features returns a list of enabled features for the given arch variant, defaults to empty list |
| def enabled_features(arch_variant, arch_variant_to_features = {}): |
| if arch_variant == None: |
| arch_variant = "" |
| return arch_variant_to_features.get(arch_variant, []) |
| |
| # variant_name creates a name based on a variant struct with arch_variant and cpu_variant |
| def variant_name(variant): |
| ret = "" |
| if variant.arch_variant: |
| ret += "_" + variant.arch_variant |
| if variant.cpu_variant: |
| ret += "_" + variant.cpu_variant |
| return ret |
| |
| # variant_constraints gets constraints based on variant struct and arch_variant_features |
| def variant_constraints(variant, arch_variant_features = {}): |
| ret = [] |
| if variant.arch_variant: |
| ret.append("//build/bazel/platforms/arch/variants:" + variant.arch_variant) |
| if variant.cpu_variant: |
| ret.append("//build/bazel/platforms/arch/variants:" + variant.cpu_variant) |
| features = enabled_features(variant.arch_variant, arch_variant_features) |
| for feature in features: |
| ret.append("//build/bazel/platforms/arch/variants:" + feature) |
| return ret |