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// Copyright 2019 The Android Open Source Project
//
// 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 (
"fmt"
"strings"
"android/soong/android"
_ "android/soong/cc/config"
)
var (
pctx = android.NewPackageContext("android/soong/rust/config")
RustDefaultVersion = "1.83.0"
RustDefaultBase = "prebuilts/rust/"
DefaultEdition = "2021"
Stdlibs = []string{
"libstd",
}
// Mapping between Soong internal arch types and std::env constants.
// Required as Rust uses aarch64 when Soong uses arm64.
StdEnvArch = map[android.ArchType]string{
android.Arm: "arm",
android.Arm64: "aarch64",
android.X86: "x86",
android.X86_64: "x86_64",
}
GlobalRustFlags = []string{
// Allow `--extern force:foo` for dylib support
"-Z unstable-options",
"-Z stack-protector=strong",
"-Z remap-cwd-prefix=.",
"-C debuginfo=2",
"-C opt-level=3",
"-C relocation-model=pic",
"-C overflow-checks=on",
"-C force-unwind-tables=yes",
// Use v0 mangling to distinguish from C++ symbols
"-C symbol-mangling-version=v0",
"--color=always",
"-Z dylib-lto",
"-Z link-native-libraries=no",
// cfg flag to indicate that we are building in AOSP with Soong
"--cfg soong",
}
LinuxHostGlobalLinkFlags = []string{
"-lc",
"-lrt",
"-ldl",
"-lpthread",
"-lm",
"-lgcc_s",
"-Wl,--compress-debug-sections=zstd",
}
deviceGlobalRustFlags = []string{
"-C panic=abort",
// Generate additional debug info for AutoFDO
"-Z debug-info-for-profiling",
// Android has ELF TLS on platform
"-Z tls-model=global-dynamic",
}
deviceGlobalLinkFlags = []string{
// Prepend the lld flags from cc_config so we stay in sync with cc
"${cc_config.DeviceGlobalLldflags}",
// Override cc's --no-undefined-version to allow rustc's generated alloc functions
"-Wl,--undefined-version",
"-Wl,-Bdynamic",
"-nostdlib",
"-Wl,--pack-dyn-relocs=android+relr",
"-Wl,--use-android-relr-tags",
"-Wl,--no-undefined",
"-B${cc_config.ClangBin}",
"-Wl,--compress-debug-sections=zstd",
}
)
func RustPath(ctx android.PathContext) string {
// I can't see any way to flatten the static variable inside Soong, so this
// reproduces the init logic.
var RustBase string = RustDefaultBase
if override := ctx.Config().Getenv("RUST_PREBUILTS_BASE"); override != "" {
RustBase = override
}
return fmt.Sprintf("%s/%s/%s", RustBase, HostPrebuiltTag(ctx.Config()), GetRustVersion(ctx))
}
func init() {
pctx.SourcePathVariable("RustDefaultBase", RustDefaultBase)
pctx.VariableConfigMethod("HostPrebuiltTag", HostPrebuiltTag)
pctx.VariableFunc("RustBase", func(ctx android.PackageVarContext) string {
if override := ctx.Config().Getenv("RUST_PREBUILTS_BASE"); override != "" {
return override
}
return "${RustDefaultBase}"
})
pctx.VariableFunc("RustVersion", getRustVersionPctx)
pctx.StaticVariable("RustPath", "${RustBase}/${HostPrebuiltTag}/${RustVersion}")
pctx.StaticVariable("RustBin", "${RustPath}/bin")
pctx.ImportAs("cc_config", "android/soong/cc/config")
pctx.StaticVariable("ClangCmd", "${cc_config.ClangBin}/clang++")
pctx.StaticVariable("DeviceGlobalLinkFlags", strings.Join(deviceGlobalLinkFlags, " "))
pctx.StaticVariable("RUST_DEFAULT_VERSION", RustDefaultVersion)
pctx.StaticVariable("GLOBAL_RUSTC_FLAGS", strings.Join(GlobalRustFlags, " "))
pctx.StaticVariable("LINUX_HOST_GLOBAL_LINK_FLAGS", strings.Join(LinuxHostGlobalLinkFlags, " "))
pctx.StaticVariable("DEVICE_GLOBAL_RUSTC_FLAGS", strings.Join(deviceGlobalRustFlags, " "))
pctx.StaticVariable("DEVICE_GLOBAL_LINK_FLAGS",
strings.Join(android.RemoveListFromList(deviceGlobalLinkFlags, []string{
// The cc_config flags are retrieved from cc_toolchain by rust rules.
"${cc_config.DeviceGlobalLldflags}",
"-B${cc_config.ClangBin}",
}), " "))
}
func HostPrebuiltTag(config android.Config) string {
if config.UseHostMusl() {
return "linux-musl-x86"
} else {
return config.PrebuiltOS()
}
}
func getRustVersionPctx(ctx android.PackageVarContext) string {
return GetRustVersion(ctx)
}
func GetRustVersion(ctx android.PathContext) string {
if override := ctx.Config().Getenv("RUST_PREBUILTS_VERSION"); override != "" {
return override
}
return RustDefaultVersion
}
|