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- // Copyright 2016 Google Inc. All rights reserved.
- //
- // 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
- //
- // http://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.
- package config
- import (
- "runtime"
- "strings"
- "android/soong/android"
- "android/soong/remoteexec"
- )
- var (
- pctx = android.NewPackageContext("android/soong/cc/config")
- exportedVars = android.NewExportedVariables(pctx)
- // Flags used by lots of devices. Putting them in package static variables
- // will save bytes in build.ninja so they aren't repeated for every file
- commonGlobalCflags = []string{
- "-DANDROID",
- "-fmessage-length=0",
- "-W",
- "-Wall",
- "-Wno-unused",
- "-Winit-self",
- "-Wpointer-arith",
- "-Wunreachable-code-loop-increment",
- // Make paths in deps files relative
- "-no-canonical-prefixes",
- "-DNDEBUG",
- "-UDEBUG",
- "-fno-exceptions",
- "-Wno-multichar",
- "-O2",
- "-g",
- "-fdebug-default-version=5",
- "-fno-strict-aliasing",
- "-Werror=date-time",
- "-Werror=pragma-pack",
- "-Werror=pragma-pack-suspicious-include",
- "-Werror=string-plus-int",
- "-Werror=unreachable-code-loop-increment",
- // Force deprecation warnings to be warnings for code that compiles with -Werror.
- // Making deprecated usages an error causes extreme pain when trying to deprecate anything.
- "-Wno-error=deprecated-declarations",
- "-D__compiler_offsetof=__builtin_offsetof",
- // Emit address-significance table which allows linker to perform safe ICF. Clang does
- // not emit the table by default on Android since NDK still uses GNU binutils.
- "-faddrsig",
- // Turn on -fcommon explicitly, since Clang now defaults to -fno-common. The cleanup bug
- // tracking this is http://b/151457797.
- "-fcommon",
- // Help catch common 32/64-bit errors.
- "-Werror=int-conversion",
- // Disable overly aggressive warning for macros defined with a leading underscore
- // This happens in AndroidConfig.h, which is included nearly everywhere.
- // TODO: can we remove this now?
- "-Wno-reserved-id-macro",
- // Force clang to always output color diagnostics. Ninja will strip the ANSI
- // color codes if it is not running in a terminal.
- "-fcolor-diagnostics",
- // Warnings from clang-7.0
- "-Wno-sign-compare",
- // Disable -Winconsistent-missing-override until we can clean up the existing
- // codebase for it.
- "-Wno-inconsistent-missing-override",
- // Warnings from clang-10
- // Nested and array designated initialization is nice to have.
- "-Wno-c99-designator",
- // Many old files still have GNU designator syntax.
- "-Wno-gnu-designator",
- // Warnings from clang-12
- "-Wno-gnu-folding-constant",
- // Calls to the APIs that are newer than the min sdk version of the caller should be
- // guarded with __builtin_available.
- "-Wunguarded-availability",
- // This macro allows the bionic versioning.h to indirectly determine whether the
- // option -Wunguarded-availability is on or not.
- "-D__ANDROID_UNAVAILABLE_SYMBOLS_ARE_WEAK__",
- // Turn off FMA which got enabled by default in clang-r445002 (http://b/218805949)
- "-ffp-contract=off",
- }
- commonGlobalConlyflags = []string{}
- commonGlobalAsflags = []string{
- "-D__ASSEMBLY__",
- // TODO(b/235105792): override global -fdebug-default-version=5, it is causing $TMPDIR to
- // end up in the dwarf data for crtend_so.S.
- "-fdebug-default-version=4",
- }
- deviceGlobalCflags = []string{
- "-ffunction-sections",
- "-fdata-sections",
- "-fno-short-enums",
- "-funwind-tables",
- "-fstack-protector-strong",
- "-Wa,--noexecstack",
- "-D_FORTIFY_SOURCE=2",
- "-Wstrict-aliasing=2",
- "-Werror=return-type",
- "-Werror=non-virtual-dtor",
- "-Werror=address",
- "-Werror=sequence-point",
- "-Werror=format-security",
- "-nostdlibinc",
- // Emit additional debug info for AutoFDO
- "-fdebug-info-for-profiling",
- }
- commonGlobalLldflags = []string{
- "-fuse-ld=lld",
- "-Wl,--icf=safe",
- }
- deviceGlobalCppflags = []string{
- "-fvisibility-inlines-hidden",
- }
- deviceGlobalLdflags = []string{
- "-Wl,-z,noexecstack",
- "-Wl,-z,relro",
- "-Wl,-z,now",
- "-Wl,--build-id=md5",
- "-Wl,--fatal-warnings",
- "-Wl,--no-undefined-version",
- // TODO: Eventually we should link against a libunwind.a with hidden symbols, and then these
- // --exclude-libs arguments can be removed.
- "-Wl,--exclude-libs,libgcc.a",
- "-Wl,--exclude-libs,libgcc_stripped.a",
- "-Wl,--exclude-libs,libunwind_llvm.a",
- "-Wl,--exclude-libs,libunwind.a",
- }
- deviceGlobalLldflags = append(deviceGlobalLdflags, commonGlobalLldflags...)
- hostGlobalCflags = []string{}
- hostGlobalCppflags = []string{}
- hostGlobalLdflags = []string{}
- hostGlobalLldflags = commonGlobalLldflags
- commonGlobalCppflags = []string{
- "-Wsign-promo",
- // -Wimplicit-fallthrough is not enabled by -Wall.
- "-Wimplicit-fallthrough",
- // Enable clang's thread-safety annotations in libcxx.
- "-D_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS",
- // libc++'s math.h has an #include_next outside of system_headers.
- "-Wno-gnu-include-next",
- }
- noOverrideGlobalCflags = []string{
- "-Werror=bool-operation",
- "-Werror=format-insufficient-args",
- "-Werror=implicit-int-float-conversion",
- "-Werror=int-in-bool-context",
- "-Werror=int-to-pointer-cast",
- "-Werror=pointer-to-int-cast",
- "-Werror=xor-used-as-pow",
- // http://b/161386391 for -Wno-void-pointer-to-enum-cast
- "-Wno-void-pointer-to-enum-cast",
- // http://b/161386391 for -Wno-void-pointer-to-int-cast
- "-Wno-void-pointer-to-int-cast",
- // http://b/161386391 for -Wno-pointer-to-int-cast
- "-Wno-pointer-to-int-cast",
- "-Werror=fortify-source",
- "-Werror=address-of-temporary",
- "-Werror=null-dereference",
- "-Werror=return-type",
- // http://b/72331526 Disable -Wtautological-* until the instances detected by these
- // new warnings are fixed.
- "-Wno-tautological-constant-compare",
- "-Wno-tautological-type-limit-compare",
- // http://b/145210666
- "-Wno-reorder-init-list",
- // http://b/145211066
- "-Wno-implicit-int-float-conversion",
- // New warnings to be fixed after clang-r377782.
- "-Wno-tautological-overlap-compare", // http://b/148815696
- // New warnings to be fixed after clang-r383902.
- "-Wno-deprecated-copy", // http://b/153746672
- "-Wno-range-loop-construct", // http://b/153747076
- "-Wno-zero-as-null-pointer-constant", // http://b/68236239
- "-Wno-deprecated-anon-enum-enum-conversion", // http://b/153746485
- "-Wno-pessimizing-move", // http://b/154270751
- // New warnings to be fixed after clang-r399163
- "-Wno-non-c-typedef-for-linkage", // http://b/161304145
- // New warnings to be fixed after clang-r428724
- "-Wno-align-mismatch", // http://b/193679946
- // New warnings to be fixed after clang-r433403
- "-Wno-error=unused-but-set-variable", // http://b/197240255
- "-Wno-error=unused-but-set-parameter", // http://b/197240255
- // New warnings to be fixed after clang-r468909
- "-Wno-error=deprecated-builtins", // http://b/241601211
- "-Wno-error=deprecated", // in external/googletest/googletest
- // New warnings to be fixed after clang-r475365
- "-Wno-error=single-bit-bitfield-constant-conversion", // http://b/243965903
- "-Wno-error=enum-constexpr-conversion", // http://b/243964282
- }
- noOverride64GlobalCflags = []string{}
- noOverrideExternalGlobalCflags = []string{
- // http://b/191699019
- "-Wno-format-insufficient-args",
- "-Wno-sizeof-array-div",
- "-Wno-incompatible-function-pointer-types",
- "-Wno-unused-but-set-variable",
- "-Wno-unused-but-set-parameter",
- "-Wno-unqualified-std-cast-call",
- "-Wno-bitwise-instead-of-logical",
- "-Wno-misleading-indentation",
- "-Wno-array-parameter",
- "-Wno-gnu-offsetof-extensions",
- }
- // Extra cflags for external third-party projects to disable warnings that
- // are infeasible to fix in all the external projects and their upstream repos.
- extraExternalCflags = []string{
- "-Wno-enum-compare",
- "-Wno-enum-compare-switch",
- // http://b/72331524 Allow null pointer arithmetic until the instances detected by
- // this new warning are fixed.
- "-Wno-null-pointer-arithmetic",
- // Bug: http://b/29823425 Disable -Wnull-dereference until the
- // new instances detected by this warning are fixed.
- "-Wno-null-dereference",
- // http://b/145211477
- "-Wno-pointer-compare",
- "-Wno-final-dtor-non-final-class",
- // http://b/165945989
- "-Wno-psabi",
- // http://b/199369603
- "-Wno-null-pointer-subtraction",
- // http://b/175068488
- "-Wno-string-concatenation",
- // http://b/239661264
- "-Wno-deprecated-non-prototype",
- }
- llvmNextExtraCommonGlobalCflags = []string{
- // Do not report warnings when testing with the top of trunk LLVM.
- "-Wno-error",
- }
- IllegalFlags = []string{
- "-w",
- }
- CStdVersion = "gnu17"
- CppStdVersion = "gnu++17"
- ExperimentalCStdVersion = "gnu2x"
- ExperimentalCppStdVersion = "gnu++2a"
- // prebuilts/clang default settings.
- ClangDefaultBase = "prebuilts/clang/host"
- ClangDefaultVersion = "clang-r487747c"
- ClangDefaultShortVersion = "17"
- // Directories with warnings from Android.bp files.
- WarningAllowedProjects = []string{
- "device/",
- "vendor/",
- }
- VersionScriptFlagPrefix = "-Wl,--version-script,"
- VisibilityHiddenFlag = "-fvisibility=hidden"
- VisibilityDefaultFlag = "-fvisibility=default"
- )
- // BazelCcToolchainVars generates bzl file content containing variables for
- // Bazel's cc_toolchain configuration.
- func BazelCcToolchainVars(config android.Config) string {
- return android.BazelToolchainVars(config, exportedVars)
- }
- func ExportStringList(name string, value []string) {
- exportedVars.ExportStringList(name, value)
- }
- func init() {
- if runtime.GOOS == "linux" {
- commonGlobalCflags = append(commonGlobalCflags, "-fdebug-prefix-map=/proc/self/cwd=")
- }
- exportedVars.ExportStringListStaticVariable("CommonGlobalConlyflags", commonGlobalConlyflags)
- exportedVars.ExportStringListStaticVariable("CommonGlobalAsflags", commonGlobalAsflags)
- exportedVars.ExportStringListStaticVariable("DeviceGlobalCppflags", deviceGlobalCppflags)
- exportedVars.ExportStringListStaticVariable("DeviceGlobalLdflags", deviceGlobalLdflags)
- exportedVars.ExportStringListStaticVariable("DeviceGlobalLldflags", deviceGlobalLldflags)
- exportedVars.ExportStringListStaticVariable("HostGlobalCppflags", hostGlobalCppflags)
- exportedVars.ExportStringListStaticVariable("HostGlobalLdflags", hostGlobalLdflags)
- exportedVars.ExportStringListStaticVariable("HostGlobalLldflags", hostGlobalLldflags)
- // Export the static default CommonGlobalCflags to Bazel.
- exportedVars.ExportStringList("CommonGlobalCflags", commonGlobalCflags)
- pctx.VariableFunc("CommonGlobalCflags", func(ctx android.PackageVarContext) string {
- flags := commonGlobalCflags
- // http://b/131390872
- // Automatically initialize any uninitialized stack variables.
- // Prefer zero-init if multiple options are set.
- if ctx.Config().IsEnvTrue("AUTO_ZERO_INITIALIZE") {
- flags = append(flags, "-ftrivial-auto-var-init=zero")
- } else if ctx.Config().IsEnvTrue("AUTO_PATTERN_INITIALIZE") {
- flags = append(flags, "-ftrivial-auto-var-init=pattern")
- } else if ctx.Config().IsEnvTrue("AUTO_UNINITIALIZE") {
- flags = append(flags, "-ftrivial-auto-var-init=uninitialized")
- } else {
- // Default to zero initialization.
- flags = append(flags, "-ftrivial-auto-var-init=zero")
- }
- // Workaround for ccache with clang.
- // See http://petereisentraut.blogspot.com/2011/05/ccache-and-clang.html.
- if ctx.Config().IsEnvTrue("USE_CCACHE") {
- flags = append(flags, "-Wno-unused-command-line-argument")
- }
- if ctx.Config().IsEnvTrue("ALLOW_UNKNOWN_WARNING_OPTION") {
- flags = append(flags, "-Wno-error=unknown-warning-option")
- }
- return strings.Join(flags, " ")
- })
- // Export the static default DeviceGlobalCflags to Bazel.
- // TODO(187086342): handle cflags that are set in VariableFuncs.
- exportedVars.ExportStringList("DeviceGlobalCflags", deviceGlobalCflags)
- pctx.VariableFunc("DeviceGlobalCflags", func(ctx android.PackageVarContext) string {
- return strings.Join(deviceGlobalCflags, " ")
- })
- // Export the static default NoOverrideGlobalCflags to Bazel.
- exportedVars.ExportStringList("NoOverrideGlobalCflags", noOverrideGlobalCflags)
- pctx.VariableFunc("NoOverrideGlobalCflags", func(ctx android.PackageVarContext) string {
- flags := noOverrideGlobalCflags
- if ctx.Config().IsEnvTrue("LLVM_NEXT") {
- flags = append(noOverrideGlobalCflags, llvmNextExtraCommonGlobalCflags...)
- }
- return strings.Join(flags, " ")
- })
- exportedVars.ExportStringListStaticVariable("NoOverride64GlobalCflags", noOverride64GlobalCflags)
- exportedVars.ExportStringListStaticVariable("HostGlobalCflags", hostGlobalCflags)
- exportedVars.ExportStringListStaticVariable("NoOverrideExternalGlobalCflags", noOverrideExternalGlobalCflags)
- exportedVars.ExportStringListStaticVariable("CommonGlobalCppflags", commonGlobalCppflags)
- exportedVars.ExportStringListStaticVariable("ExternalCflags", extraExternalCflags)
- exportedVars.ExportString("CStdVersion", CStdVersion)
- exportedVars.ExportString("CppStdVersion", CppStdVersion)
- exportedVars.ExportString("ExperimentalCStdVersion", ExperimentalCStdVersion)
- exportedVars.ExportString("ExperimentalCppStdVersion", ExperimentalCppStdVersion)
- exportedVars.ExportString("VersionScriptFlagPrefix", VersionScriptFlagPrefix)
- exportedVars.ExportString("VisibilityHiddenFlag", VisibilityHiddenFlag)
- exportedVars.ExportString("VisibilityDefaultFlag", VisibilityDefaultFlag)
- // Everything in these lists is a crime against abstraction and dependency tracking.
- // Do not add anything to this list.
- commonGlobalIncludes := []string{
- "system/core/include",
- "system/logging/liblog/include",
- "system/media/audio/include",
- "hardware/libhardware/include",
- "hardware/libhardware_legacy/include",
- "hardware/ril/include",
- "frameworks/native/include",
- "frameworks/native/opengl/include",
- "frameworks/av/include",
- }
- exportedVars.ExportStringList("CommonGlobalIncludes", commonGlobalIncludes)
- pctx.PrefixedExistentPathsForSourcesVariable("CommonGlobalIncludes", "-I", commonGlobalIncludes)
- exportedVars.ExportStringStaticVariable("CLANG_DEFAULT_VERSION", ClangDefaultVersion)
- exportedVars.ExportStringStaticVariable("CLANG_DEFAULT_SHORT_VERSION", ClangDefaultShortVersion)
- pctx.StaticVariableWithEnvOverride("ClangBase", "LLVM_PREBUILTS_BASE", ClangDefaultBase)
- pctx.StaticVariableWithEnvOverride("ClangVersion", "LLVM_PREBUILTS_VERSION", ClangDefaultVersion)
- pctx.StaticVariable("ClangPath", "${ClangBase}/${HostPrebuiltTag}/${ClangVersion}")
- pctx.StaticVariable("ClangBin", "${ClangPath}/bin")
- pctx.StaticVariableWithEnvOverride("ClangShortVersion", "LLVM_RELEASE_VERSION", ClangDefaultShortVersion)
- pctx.StaticVariable("ClangAsanLibDir", "${ClangBase}/linux-x86/${ClangVersion}/lib/clang/${ClangShortVersion}/lib/linux")
- exportedVars.ExportStringListStaticVariable("WarningAllowedProjects", WarningAllowedProjects)
- // These are tied to the version of LLVM directly in external/llvm, so they might trail the host prebuilts
- // being used for the rest of the build process.
- pctx.SourcePathVariable("RSClangBase", "prebuilts/clang/host")
- pctx.SourcePathVariable("RSClangVersion", "clang-3289846")
- pctx.SourcePathVariable("RSReleaseVersion", "3.8")
- pctx.StaticVariable("RSLLVMPrebuiltsPath", "${RSClangBase}/${HostPrebuiltTag}/${RSClangVersion}/bin")
- pctx.StaticVariable("RSIncludePath", "${RSLLVMPrebuiltsPath}/../lib64/clang/${RSReleaseVersion}/include")
- rsGlobalIncludes := []string{
- "external/clang/lib/Headers",
- "frameworks/rs/script_api/include",
- }
- pctx.PrefixedExistentPathsForSourcesVariable("RsGlobalIncludes", "-I", rsGlobalIncludes)
- exportedVars.ExportStringList("RsGlobalIncludes", rsGlobalIncludes)
- pctx.VariableFunc("CcWrapper", func(ctx android.PackageVarContext) string {
- if override := ctx.Config().Getenv("CC_WRAPPER"); override != "" {
- return override + " "
- }
- return ""
- })
- pctx.StaticVariableWithEnvOverride("RECXXPool", "RBE_CXX_POOL", remoteexec.DefaultPool)
- pctx.StaticVariableWithEnvOverride("RECXXLinksPool", "RBE_CXX_LINKS_POOL", remoteexec.DefaultPool)
- pctx.StaticVariableWithEnvOverride("REClangTidyPool", "RBE_CLANG_TIDY_POOL", remoteexec.DefaultPool)
- pctx.StaticVariableWithEnvOverride("RECXXLinksExecStrategy", "RBE_CXX_LINKS_EXEC_STRATEGY", remoteexec.LocalExecStrategy)
- pctx.StaticVariableWithEnvOverride("REClangTidyExecStrategy", "RBE_CLANG_TIDY_EXEC_STRATEGY", remoteexec.LocalExecStrategy)
- pctx.StaticVariableWithEnvOverride("REAbiDumperExecStrategy", "RBE_ABI_DUMPER_EXEC_STRATEGY", remoteexec.LocalExecStrategy)
- pctx.StaticVariableWithEnvOverride("REAbiLinkerExecStrategy", "RBE_ABI_LINKER_EXEC_STRATEGY", remoteexec.LocalExecStrategy)
- }
- var HostPrebuiltTag = exportedVars.ExportVariableConfigMethod("HostPrebuiltTag", android.Config.PrebuiltOS)
- func ClangPath(ctx android.PathContext, file string) android.SourcePath {
- type clangToolKey string
- key := android.NewCustomOnceKey(clangToolKey(file))
- return ctx.Config().OnceSourcePath(key, func() android.SourcePath {
- return clangPath(ctx).Join(ctx, file)
- })
- }
- var clangPathKey = android.NewOnceKey("clangPath")
- func clangPath(ctx android.PathContext) android.SourcePath {
- return ctx.Config().OnceSourcePath(clangPathKey, func() android.SourcePath {
- clangBase := ClangDefaultBase
- if override := ctx.Config().Getenv("LLVM_PREBUILTS_BASE"); override != "" {
- clangBase = override
- }
- clangVersion := ClangDefaultVersion
- if override := ctx.Config().Getenv("LLVM_PREBUILTS_VERSION"); override != "" {
- clangVersion = override
- }
- return android.PathForSource(ctx, clangBase, ctx.Config().PrebuiltOS(), clangVersion)
- })
- }
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