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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 rust
import (
"android/soong/android"
)
func init() {
android.RegisterModuleType("rust_library", RustLibraryFactory)
android.RegisterModuleType("rust_library_dylib", RustLibraryDylibFactory)
android.RegisterModuleType("rust_library_rlib", RustLibraryRlibFactory)
android.RegisterModuleType("rust_library_host", RustLibraryHostFactory)
android.RegisterModuleType("rust_library_host_dylib", RustLibraryDylibHostFactory)
android.RegisterModuleType("rust_library_host_rlib", RustLibraryRlibHostFactory)
//TODO: Add support for generating standard shared/static libraries.
}
type VariantLibraryProperties struct {
Enabled *bool `android:"arch_variant"`
}
type LibraryCompilerProperties struct {
Rlib VariantLibraryProperties `android:"arch_variant"`
Dylib VariantLibraryProperties `android:"arch_variant"`
// path to the source file that is the main entry point of the program (e.g. src/lib.rs)
Srcs []string `android:"path,arch_variant"`
}
type LibraryMutatedProperties struct {
VariantName string `blueprint:"mutated"`
// Build a dylib variant
BuildDylib bool `blueprint:"mutated"`
// Build an rlib variant
BuildRlib bool `blueprint:"mutated"`
// This variant is a dylib
VariantIsDylib bool `blueprint:"mutated"`
// This variant is an rlib
VariantIsRlib bool `blueprint:"mutated"`
}
type libraryDecorator struct {
*baseCompiler
Properties LibraryCompilerProperties
MutatedProperties LibraryMutatedProperties
distFile android.OptionalPath
unstrippedOutputFile android.Path
}
type libraryInterface interface {
rlib() bool
dylib() bool
// Returns true if the build options for the module have selected a particular build type
buildRlib() bool
buildDylib() bool
// Sets a particular variant type
setRlib()
setDylib()
}
func (library *libraryDecorator) exportedDirs() []string {
return library.linkDirs
}
func (library *libraryDecorator) exportedDepFlags() []string {
return library.depFlags
}
func (library *libraryDecorator) reexportDirs(dirs ...string) {
library.linkDirs = android.FirstUniqueStrings(append(library.linkDirs, dirs...))
}
func (library *libraryDecorator) reexportDepFlags(flags ...string) {
library.depFlags = android.FirstUniqueStrings(append(library.depFlags, flags...))
}
func (library *libraryDecorator) rlib() bool {
return library.MutatedProperties.VariantIsRlib
}
func (library *libraryDecorator) dylib() bool {
return library.MutatedProperties.VariantIsDylib
}
func (library *libraryDecorator) buildRlib() bool {
return library.MutatedProperties.BuildRlib && BoolDefault(library.Properties.Rlib.Enabled, true)
}
func (library *libraryDecorator) buildDylib() bool {
return library.MutatedProperties.BuildDylib && BoolDefault(library.Properties.Dylib.Enabled, true)
}
func (library *libraryDecorator) setRlib() {
library.MutatedProperties.VariantIsRlib = true
library.MutatedProperties.VariantIsDylib = false
}
func (library *libraryDecorator) setDylib() {
library.MutatedProperties.VariantIsRlib = false
library.MutatedProperties.VariantIsDylib = true
}
var _ compiler = (*libraryDecorator)(nil)
// rust_library produces all variants.
func RustLibraryFactory() android.Module {
module, _ := NewRustLibrary(android.HostAndDeviceSupported)
return module.Init()
}
// rust_library_dylib produces a dylib.
func RustLibraryDylibFactory() android.Module {
module, library := NewRustLibrary(android.HostAndDeviceSupported)
library.BuildOnlyDylib()
return module.Init()
}
// rust_library_rlib produces an rlib.
func RustLibraryRlibFactory() android.Module {
module, library := NewRustLibrary(android.HostAndDeviceSupported)
library.BuildOnlyRlib()
return module.Init()
}
// rust_library_host produces all variants.
func RustLibraryHostFactory() android.Module {
module, _ := NewRustLibrary(android.HostSupported)
return module.Init()
}
// rust_library_dylib_host produces a dylib.
func RustLibraryDylibHostFactory() android.Module {
module, library := NewRustLibrary(android.HostSupported)
library.BuildOnlyDylib()
return module.Init()
}
// rust_library_rlib_host produces an rlib.
func RustLibraryRlibHostFactory() android.Module {
module, library := NewRustLibrary(android.HostSupported)
library.BuildOnlyRlib()
return module.Init()
}
func (library *libraryDecorator) BuildOnlyDylib() {
library.MutatedProperties.BuildRlib = false
}
func (library *libraryDecorator) BuildOnlyRlib() {
library.MutatedProperties.BuildDylib = false
}
func NewRustLibrary(hod android.HostOrDeviceSupported) (*Module, *libraryDecorator) {
module := newModule(hod, android.MultilibFirst)
library := &libraryDecorator{
MutatedProperties: LibraryMutatedProperties{
BuildDylib: true,
BuildRlib: true,
},
baseCompiler: NewBaseCompiler("lib", "lib64"),
}
module.compiler = library
return module, library
}
func (library *libraryDecorator) compilerProps() []interface{} {
return append(library.baseCompiler.compilerProps(),
&library.Properties,
&library.MutatedProperties)
}
func (library *libraryDecorator) compile(ctx ModuleContext, flags Flags, deps PathDeps) android.Path {
var outputFile android.WritablePath
srcPath := srcPathFromModuleSrcs(ctx, library.Properties.Srcs)
flags.RustFlags = append(flags.RustFlags, deps.depFlags...)
if library.rlib() {
fileName := library.getStem(ctx) + ctx.toolchain().RlibSuffix()
outputFile = android.PathForModuleOut(ctx, fileName)
TransformSrctoRlib(ctx, srcPath, deps, flags, outputFile, deps.linkDirs)
} else if library.dylib() {
fileName := library.getStem(ctx) + ctx.toolchain().DylibSuffix()
outputFile = android.PathForModuleOut(ctx, fileName)
// We need prefer-dynamic for now to avoid linking in the static stdlib. See:
// https://github.com/rust-lang/rust/issues/19680
// https://github.com/rust-lang/rust/issues/34909
flags.RustFlags = append(flags.RustFlags, "-C prefer-dynamic")
TransformSrctoDylib(ctx, srcPath, deps, flags, outputFile, deps.linkDirs)
}
library.reexportDirs(deps.linkDirs...)
library.reexportDepFlags(deps.depFlags...)
library.unstrippedOutputFile = outputFile
return outputFile
}
func LibraryMutator(mctx android.BottomUpMutatorContext) {
if m, ok := mctx.Module().(*Module); ok && m.compiler != nil {
switch library := m.compiler.(type) {
case libraryInterface:
if library.buildRlib() && library.buildDylib() {
modules := mctx.CreateLocalVariations("rlib", "dylib")
rlib := modules[0].(*Module)
dylib := modules[1].(*Module)
rlib.compiler.(libraryInterface).setRlib()
dylib.compiler.(libraryInterface).setDylib()
} else if library.buildRlib() {
modules := mctx.CreateLocalVariations("rlib")
modules[0].(*Module).compiler.(libraryInterface).setRlib()
} else if library.buildDylib() {
modules := mctx.CreateLocalVariations("dylib")
modules[0].(*Module).compiler.(libraryInterface).setDylib()
}
}
}
}
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