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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 cc
import (
"fmt"
"strings"
"android/soong/android"
"android/soong/cc/config"
)
func init() {
android.RegisterModuleType("ndk_prebuilt_object", NdkPrebuiltObjectFactory)
android.RegisterModuleType("ndk_prebuilt_static_stl", NdkPrebuiltStaticStlFactory)
android.RegisterModuleType("ndk_prebuilt_shared_stl", NdkPrebuiltSharedStlFactory)
}
// NDK prebuilt libraries.
//
// These differ from regular prebuilts in that they aren't stripped and usually aren't installed
// either (with the exception of the shared STLs, which are installed to the app's directory rather
// than to the system image).
func getNdkLibDir(ctx android.ModuleContext, toolchain config.Toolchain, version string) android.SourcePath {
suffix := ""
// Most 64-bit NDK prebuilts store libraries in "lib64", except for arm64 which is not a
// multilib toolchain and stores the libraries in "lib".
if toolchain.Is64Bit() && ctx.Arch().ArchType != android.Arm64 {
suffix = "64"
}
return android.PathForSource(ctx, fmt.Sprintf("prebuilts/ndk/current/platforms/android-%s/arch-%s/usr/lib%s",
version, toolchain.Name(), suffix))
}
func ndkPrebuiltModuleToPath(ctx android.ModuleContext, toolchain config.Toolchain,
ext string, version string) android.Path {
// NDK prebuilts are named like: ndk_NAME.EXT.SDK_VERSION.
// We want to translate to just NAME.EXT
name := strings.Split(strings.TrimPrefix(ctx.ModuleName(), "ndk_"), ".")[0]
dir := getNdkLibDir(ctx, toolchain, version)
return dir.Join(ctx, name+ext)
}
type ndkPrebuiltObjectLinker struct {
objectLinker
}
func (*ndkPrebuiltObjectLinker) linkerDeps(ctx DepsContext, deps Deps) Deps {
// NDK objects can't have any dependencies
return deps
}
// ndk_prebuilt_object exports a precompiled ndk object file for linking
// operations. Soong's module name format is ndk_<NAME>.o.<sdk_version> where
// the object is located under
// ./prebuilts/ndk/current/platforms/android-<sdk_version>/arch-$(HOST_ARCH)/usr/lib/<NAME>.o.
func NdkPrebuiltObjectFactory() android.Module {
module := newBaseModule(android.DeviceSupported, android.MultilibBoth)
module.ModuleBase.EnableNativeBridgeSupportByDefault()
module.linker = &ndkPrebuiltObjectLinker{
objectLinker: objectLinker{
baseLinker: NewBaseLinker(nil),
},
}
module.Properties.AlwaysSdk = true
module.Properties.Sdk_version = StringPtr("current")
module.Properties.HideFromMake = true
return module.Init()
}
func (c *ndkPrebuiltObjectLinker) link(ctx ModuleContext, flags Flags,
deps PathDeps, objs Objects) android.Path {
// A null build step, but it sets up the output path.
if !strings.HasPrefix(ctx.ModuleName(), "ndk_crt") {
ctx.ModuleErrorf("NDK prebuilt objects must have an ndk_crt prefixed name")
}
return ndkPrebuiltModuleToPath(ctx, flags.Toolchain, objectExtension, ctx.sdkVersion())
}
func (*ndkPrebuiltObjectLinker) availableFor(what string) bool {
// ndk prebuilt objects are available to everywhere
return true
}
type ndkPrebuiltStlLinker struct {
*libraryDecorator
}
func (ndk *ndkPrebuiltStlLinker) linkerProps() []interface{} {
return append(ndk.libraryDecorator.linkerProps(), &ndk.Properties, &ndk.flagExporter.Properties)
}
func (*ndkPrebuiltStlLinker) linkerDeps(ctx DepsContext, deps Deps) Deps {
// NDK libraries can't have any dependencies
return deps
}
func (*ndkPrebuiltStlLinker) availableFor(what string) bool {
// ndk prebuilt objects are available to everywhere
return true
}
// ndk_prebuilt_shared_stl exports a precompiled ndk shared standard template
// library (stl) library for linking operation. The soong's module name format
// is ndk_<NAME>.so where the library is located under
// ./prebuilts/ndk/current/sources/cxx-stl/llvm-libc++/libs/$(HOST_ARCH)/<NAME>.so.
func NdkPrebuiltSharedStlFactory() android.Module {
module, library := NewLibrary(android.DeviceSupported)
library.BuildOnlyShared()
module.compiler = nil
module.linker = &ndkPrebuiltStlLinker{
libraryDecorator: library,
}
module.installer = nil
module.Properties.Sdk_version = StringPtr("minimum")
module.Properties.AlwaysSdk = true
module.stl.Properties.Stl = StringPtr("none")
return module.Init()
}
// ndk_prebuilt_static_stl exports a precompiled ndk static standard template
// library (stl) library for linking operation. The soong's module name format
// is ndk_<NAME>.a where the library is located under
// ./prebuilts/ndk/current/sources/cxx-stl/llvm-libc++/libs/$(HOST_ARCH)/<NAME>.a.
func NdkPrebuiltStaticStlFactory() android.Module {
module, library := NewLibrary(android.DeviceSupported)
library.BuildOnlyStatic()
module.compiler = nil
module.linker = &ndkPrebuiltStlLinker{
libraryDecorator: library,
}
module.installer = nil
module.Properties.Sdk_version = StringPtr("minimum")
module.Properties.HideFromMake = true
module.Properties.AlwaysSdk = true
module.Properties.Sdk_version = StringPtr("current")
module.stl.Properties.Stl = StringPtr("none")
module.ModuleBase.EnableNativeBridgeSupportByDefault()
return module.Init()
}
func getNdkStlLibDir(ctx android.ModuleContext) android.SourcePath {
libDir := "prebuilts/ndk/current/sources/cxx-stl/llvm-libc++/libs"
return android.PathForSource(ctx, libDir).Join(ctx, ctx.Arch().Abi[0])
}
func (ndk *ndkPrebuiltStlLinker) link(ctx ModuleContext, flags Flags,
deps PathDeps, objs Objects) android.Path {
// A null build step, but it sets up the output path.
if !strings.HasPrefix(ctx.ModuleName(), "ndk_lib") {
ctx.ModuleErrorf("NDK prebuilt libraries must have an ndk_lib prefixed name")
}
ndk.libraryDecorator.flagExporter.exportIncludesAsSystem(ctx)
libName := strings.TrimPrefix(ctx.ModuleName(), "ndk_")
libExt := flags.Toolchain.ShlibSuffix()
if ndk.static() {
libExt = staticLibraryExtension
}
libDir := getNdkStlLibDir(ctx)
lib := libDir.Join(ctx, libName+libExt)
ndk.libraryDecorator.flagExporter.setProvider(ctx)
if ndk.static() {
depSet := android.NewDepSetBuilder(android.TOPOLOGICAL).Direct(lib).Build()
ctx.SetProvider(StaticLibraryInfoProvider, StaticLibraryInfo{
StaticLibrary: lib,
TransitiveStaticLibrariesForOrdering: depSet,
})
} else {
ctx.SetProvider(SharedLibraryInfoProvider, SharedLibraryInfo{
SharedLibrary: lib,
UnstrippedSharedLibrary: lib,
})
}
return lib
}
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