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// Copyright 2018 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 cc
import (
"strings"
"sync"
"android/soong/android"
)
var (
vendorPublicLibrarySuffix = ".vendorpublic"
vendorPublicLibrariesKey = android.NewOnceKey("vendorPublicLibraries")
vendorPublicLibrariesLock sync.Mutex
)
func vendorPublicLibraries(config android.Config) *[]string {
return config.Once(vendorPublicLibrariesKey, func() interface{} {
return &[]string{}
}).(*[]string)
}
// Creates a stub shared library for a vendor public library. Vendor public libraries
// are vendor libraries (owned by them and installed to /vendor partition) that are
// exposed to Android apps via JNI. The libraries are made public by being listed in
// /vendor/etc/public.libraries.txt.
//
// This stub library is a build-time only artifact that provides symbols that are
// exposed from a vendor public library.
//
// Example:
//
// vendor_public_library {
// name: "libfoo",
// symbol_file: "libfoo.map.txt",
// export_public_headers: ["libfoo_headers"],
// }
//
// cc_headers {
// name: "libfoo_headers",
// export_include_dirs: ["include"],
// }
//
type vendorPublicLibraryProperties struct {
// Relative path to the symbol map.
Symbol_file *string
// Whether the system library uses symbol versions.
Unversioned *bool
// list of header libs to re-export include directories from.
Export_public_headers []string `android:"arch_variant"`
}
type vendorPublicLibraryStubDecorator struct {
*libraryDecorator
Properties vendorPublicLibraryProperties
versionScriptPath android.ModuleGenPath
}
func (stub *vendorPublicLibraryStubDecorator) Name(name string) string {
return name + vendorPublicLibrarySuffix
}
func (stub *vendorPublicLibraryStubDecorator) compilerInit(ctx BaseModuleContext) {
stub.baseCompiler.compilerInit(ctx)
name := ctx.baseModuleName()
if strings.HasSuffix(name, vendorPublicLibrarySuffix) {
ctx.PropertyErrorf("name", "Do not append %q manually, just use the base name", vendorPublicLibrarySuffix)
}
vendorPublicLibrariesLock.Lock()
defer vendorPublicLibrariesLock.Unlock()
vendorPublicLibraries := vendorPublicLibraries(ctx.Config())
for _, lib := range *vendorPublicLibraries {
if lib == name {
return
}
}
*vendorPublicLibraries = append(*vendorPublicLibraries, name)
}
func (stub *vendorPublicLibraryStubDecorator) compilerFlags(ctx ModuleContext, flags Flags, deps PathDeps) Flags {
flags = stub.baseCompiler.compilerFlags(ctx, flags, deps)
return addStubLibraryCompilerFlags(flags)
}
func (stub *vendorPublicLibraryStubDecorator) compile(ctx ModuleContext, flags Flags, deps PathDeps) Objects {
objs, versionScript := compileStubLibrary(ctx, flags, String(stub.Properties.Symbol_file), "current", "")
stub.versionScriptPath = versionScript
return objs
}
func (stub *vendorPublicLibraryStubDecorator) linkerDeps(ctx DepsContext, deps Deps) Deps {
headers := stub.Properties.Export_public_headers
deps.HeaderLibs = append(deps.HeaderLibs, headers...)
deps.ReexportHeaderLibHeaders = append(deps.ReexportHeaderLibHeaders, headers...)
return deps
}
func (stub *vendorPublicLibraryStubDecorator) linkerFlags(ctx ModuleContext, flags Flags) Flags {
stub.libraryDecorator.libName = strings.TrimSuffix(ctx.ModuleName(), vendorPublicLibrarySuffix)
return stub.libraryDecorator.linkerFlags(ctx, flags)
}
func (stub *vendorPublicLibraryStubDecorator) link(ctx ModuleContext, flags Flags, deps PathDeps,
objs Objects) android.Path {
if !Bool(stub.Properties.Unversioned) {
linkerScriptFlag := "-Wl,--version-script," + stub.versionScriptPath.String()
flags.Local.LdFlags = append(flags.Local.LdFlags, linkerScriptFlag)
flags.LdFlagsDeps = append(flags.LdFlagsDeps, stub.versionScriptPath)
}
return stub.libraryDecorator.link(ctx, flags, deps, objs)
}
// vendor_public_library creates a stub shared library for a vendor public
// library. This stub library is a build-time only artifact that provides
// symbols that are exposed from a vendor public library. Example:
//
// vendor_public_library {
// name: "libfoo",
// symbol_file: "libfoo.map.txt",
// export_public_headers: ["libfoo_headers"],
// }
func vendorPublicLibraryFactory() android.Module {
module, library := NewLibrary(android.DeviceSupported)
library.BuildOnlyShared()
module.stl = nil
module.sanitize = nil
library.disableStripping()
stub := &vendorPublicLibraryStubDecorator{
libraryDecorator: library,
}
module.compiler = stub
module.linker = stub
module.installer = nil
module.AddProperties(
&stub.Properties,
&library.MutatedProperties,
&library.flagExporter.Properties)
android.InitAndroidArchModule(module, android.DeviceSupported, android.MultilibBoth)
return module
}
func init() {
android.RegisterModuleType("vendor_public_library", vendorPublicLibraryFactory)
}
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