4fb4ef2242
Create new musl toolchains that are based on the existing glibc toolchains, and add the necessary flags for musl compiles. Bug: 190084016 Test: TestArchMutator Change-Id: Ifc02f9e5afa61ff758be98b0c962f3a4b53d0546
228 lines
8 KiB
Go
228 lines
8 KiB
Go
// Copyright 2021 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://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,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package bazel
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import (
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"fmt"
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"strings"
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)
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const (
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// ArchType names in arch.go
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archArm = "arm"
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archArm64 = "arm64"
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archX86 = "x86"
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archX86_64 = "x86_64"
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// OsType names in arch.go
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osAndroid = "android"
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osDarwin = "darwin"
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osLinux = "linux_glibc"
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osLinuxMusl = "linux_musl"
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osLinuxBionic = "linux_bionic"
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osWindows = "windows"
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// Targets in arch.go
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osArchAndroidArm = "android_arm"
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osArchAndroidArm64 = "android_arm64"
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osArchAndroidX86 = "android_x86"
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osArchAndroidX86_64 = "android_x86_64"
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osArchDarwinX86_64 = "darwin_x86_64"
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osArchLinuxX86 = "linux_glibc_x86"
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osArchLinuxX86_64 = "linux_glibc_x86_64"
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osArchLinuxMuslX86 = "linux_musl_x86"
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osArchLinuxMuslX86_64 = "linux_musl_x86_64"
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osArchLinuxBionicArm64 = "linux_bionic_arm64"
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osArchLinuxBionicX86_64 = "linux_bionic_x86_64"
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osArchWindowsX86 = "windows_x86"
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osArchWindowsX86_64 = "windows_x86_64"
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// This is the string representation of the default condition wherever a
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// configurable attribute is used in a select statement, i.e.
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// //conditions:default for Bazel.
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//
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// This is consistently named "conditions_default" to mirror the Soong
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// config variable default key in an Android.bp file, although there's no
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// integration with Soong config variables (yet).
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conditionsDefault = "conditions_default"
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ConditionsDefaultSelectKey = "//conditions:default"
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productVariableBazelPackage = "//build/bazel/product_variables"
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)
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var (
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// These are the list of OSes and architectures with a Bazel config_setting
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// and constraint value equivalent. These exist in arch.go, but the android
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// package depends on the bazel package, so a cyclic dependency prevents
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// using those variables here.
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// A map of architectures to the Bazel label of the constraint_value
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// for the @platforms//cpu:cpu constraint_setting
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platformArchMap = map[string]string{
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archArm: "//build/bazel/platforms/arch:arm",
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archArm64: "//build/bazel/platforms/arch:arm64",
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archX86: "//build/bazel/platforms/arch:x86",
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archX86_64: "//build/bazel/platforms/arch:x86_64",
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conditionsDefault: ConditionsDefaultSelectKey, // The default condition of as arch select map.
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}
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// A map of target operating systems to the Bazel label of the
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// constraint_value for the @platforms//os:os constraint_setting
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platformOsMap = map[string]string{
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osAndroid: "//build/bazel/platforms/os:android",
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osDarwin: "//build/bazel/platforms/os:darwin",
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osLinux: "//build/bazel/platforms/os:linux",
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osLinuxMusl: "//build/bazel/platforms/os:linux_musl",
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osLinuxBionic: "//build/bazel/platforms/os:linux_bionic",
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osWindows: "//build/bazel/platforms/os:windows",
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conditionsDefault: ConditionsDefaultSelectKey, // The default condition of an os select map.
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}
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platformBionicMap = map[string]string{
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"bionic": "//build/bazel/platforms/os:bionic",
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conditionsDefault: ConditionsDefaultSelectKey, // The default condition of an os select map.
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}
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platformOsArchMap = map[string]string{
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osArchAndroidArm: "//build/bazel/platforms/os_arch:android_arm",
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osArchAndroidArm64: "//build/bazel/platforms/os_arch:android_arm64",
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osArchAndroidX86: "//build/bazel/platforms/os_arch:android_x86",
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osArchAndroidX86_64: "//build/bazel/platforms/os_arch:android_x86_64",
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osArchDarwinX86_64: "//build/bazel/platforms/os_arch:darwin_x86_64",
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osArchLinuxX86: "//build/bazel/platforms/os_arch:linux_glibc_x86",
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osArchLinuxX86_64: "//build/bazel/platforms/os_arch:linux_glibc_x86_64",
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osArchLinuxMuslX86: "//build/bazel/platforms/os_arch:linux_musl_x86",
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osArchLinuxMuslX86_64: "//build/bazel/platforms/os_arch:linux_musl_x86_64",
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osArchLinuxBionicArm64: "//build/bazel/platforms/os_arch:linux_bionic_arm64",
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osArchLinuxBionicX86_64: "//build/bazel/platforms/os_arch:linux_bionic_x86_64",
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osArchWindowsX86: "//build/bazel/platforms/os_arch:windows_x86",
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osArchWindowsX86_64: "//build/bazel/platforms/os_arch:windows_x86_64",
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conditionsDefault: ConditionsDefaultSelectKey, // The default condition of an os select map.
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}
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)
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// basic configuration types
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type configurationType int
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const (
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noConfig configurationType = iota
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arch
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os
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osArch
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bionic
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productVariables
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)
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func (ct configurationType) String() string {
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return map[configurationType]string{
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noConfig: "no_config",
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arch: "arch",
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os: "os",
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osArch: "arch_os",
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bionic: "bionic",
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productVariables: "product_variables",
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}[ct]
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}
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func (ct configurationType) validateConfig(config string) {
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switch ct {
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case noConfig:
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if config != "" {
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panic(fmt.Errorf("Cannot specify config with %s, but got %s", ct, config))
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}
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case arch:
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if _, ok := platformArchMap[config]; !ok {
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panic(fmt.Errorf("Unknown arch: %s", config))
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}
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case os:
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if _, ok := platformOsMap[config]; !ok {
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panic(fmt.Errorf("Unknown os: %s", config))
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}
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case osArch:
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if _, ok := platformOsArchMap[config]; !ok {
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panic(fmt.Errorf("Unknown os+arch: %s", config))
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}
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case bionic:
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if _, ok := platformBionicMap[config]; !ok {
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panic(fmt.Errorf("Unknown for %s: %s", ct.String(), config))
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}
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case productVariables:
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// do nothing
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default:
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panic(fmt.Errorf("Unrecognized ConfigurationType %d", ct))
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}
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}
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// SelectKey returns the Bazel select key for a given configurationType and config string.
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func (ct configurationType) SelectKey(config string) string {
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ct.validateConfig(config)
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switch ct {
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case noConfig:
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panic(fmt.Errorf("SelectKey is unnecessary for noConfig ConfigurationType "))
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case arch:
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return platformArchMap[config]
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case os:
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return platformOsMap[config]
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case osArch:
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return platformOsArchMap[config]
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case bionic:
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return platformBionicMap[config]
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case productVariables:
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if config == conditionsDefault {
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return ConditionsDefaultSelectKey
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}
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return fmt.Sprintf("%s:%s", productVariableBazelPackage, strings.ToLower(config))
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default:
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panic(fmt.Errorf("Unrecognized ConfigurationType %d", ct))
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}
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}
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var (
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// Indicating there is no configuration axis
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NoConfigAxis = ConfigurationAxis{configurationType: noConfig}
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// An axis for architecture-specific configurations
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ArchConfigurationAxis = ConfigurationAxis{configurationType: arch}
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// An axis for os-specific configurations
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OsConfigurationAxis = ConfigurationAxis{configurationType: os}
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// An axis for arch+os-specific configurations
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OsArchConfigurationAxis = ConfigurationAxis{configurationType: osArch}
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// An axis for bionic os-specific configurations
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BionicConfigurationAxis = ConfigurationAxis{configurationType: bionic}
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)
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// ProductVariableConfigurationAxis returns an axis for the given product variable
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func ProductVariableConfigurationAxis(variable string) ConfigurationAxis {
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return ConfigurationAxis{
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configurationType: productVariables,
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subType: variable,
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}
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}
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// ConfigurationAxis is an independent axis for configuration, there should be no overlap between
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// elements within an axis.
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type ConfigurationAxis struct {
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configurationType
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// some configuration types (e.g. productVariables) have multiple independent axes, subType helps
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// distinguish between them without needing to list all 17 product variables.
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subType string
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}
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func (ca *ConfigurationAxis) less(other ConfigurationAxis) bool {
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if ca.configurationType < other.configurationType {
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return true
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}
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return ca.subType < other.subType
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}
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