1// Copyright 2016 Google Inc. All rights reserved. 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15package cc 16 17import ( 18 "fmt" 19 "strings" 20 21 "android/soong/android" 22 "android/soong/cc/config" 23) 24 25func init() { 26 android.RegisterModuleType("ndk_prebuilt_object", NdkPrebuiltObjectFactory) 27 android.RegisterModuleType("ndk_prebuilt_static_stl", NdkPrebuiltStaticStlFactory) 28 android.RegisterModuleType("ndk_prebuilt_shared_stl", NdkPrebuiltSharedStlFactory) 29} 30 31// NDK prebuilt libraries. 32// 33// These differ from regular prebuilts in that they aren't stripped and usually aren't installed 34// either (with the exception of the shared STLs, which are installed to the app's directory rather 35// than to the system image). 36 37func getNdkLibDir(ctx android.ModuleContext, toolchain config.Toolchain, version string) android.SourcePath { 38 suffix := "" 39 // Most 64-bit NDK prebuilts store libraries in "lib64", except for arm64 which is not a 40 // multilib toolchain and stores the libraries in "lib". 41 if toolchain.Is64Bit() && ctx.Arch().ArchType != android.Arm64 { 42 suffix = "64" 43 } 44 return android.PathForSource(ctx, fmt.Sprintf("prebuilts/ndk/current/platforms/android-%s/arch-%s/usr/lib%s", 45 version, toolchain.Name(), suffix)) 46} 47 48func ndkPrebuiltModuleToPath(ctx android.ModuleContext, toolchain config.Toolchain, 49 ext string, version string) android.Path { 50 51 // NDK prebuilts are named like: ndk_NAME.EXT.SDK_VERSION. 52 // We want to translate to just NAME.EXT 53 name := strings.Split(strings.TrimPrefix(ctx.ModuleName(), "ndk_"), ".")[0] 54 dir := getNdkLibDir(ctx, toolchain, version) 55 return dir.Join(ctx, name+ext) 56} 57 58type ndkPrebuiltObjectLinker struct { 59 objectLinker 60} 61 62func (*ndkPrebuiltObjectLinker) linkerDeps(ctx DepsContext, deps Deps) Deps { 63 // NDK objects can't have any dependencies 64 return deps 65} 66 67// ndk_prebuilt_object exports a precompiled ndk object file for linking 68// operations. Soong's module name format is ndk_<NAME>.o.<sdk_version> where 69// the object is located under 70// ./prebuilts/ndk/current/platforms/android-<sdk_version>/arch-$(HOST_ARCH)/usr/lib/<NAME>.o. 71func NdkPrebuiltObjectFactory() android.Module { 72 module := newBaseModule(android.DeviceSupported, android.MultilibBoth) 73 module.linker = &ndkPrebuiltObjectLinker{ 74 objectLinker: objectLinker{ 75 baseLinker: NewBaseLinker(nil), 76 }, 77 } 78 module.Properties.AlwaysSdk = true 79 module.Properties.Sdk_version = StringPtr("current") 80 module.Properties.HideFromMake = true 81 return module.Init() 82} 83 84func (c *ndkPrebuiltObjectLinker) link(ctx ModuleContext, flags Flags, 85 deps PathDeps, objs Objects) android.Path { 86 // A null build step, but it sets up the output path. 87 if !strings.HasPrefix(ctx.ModuleName(), "ndk_crt") { 88 ctx.ModuleErrorf("NDK prebuilt objects must have an ndk_crt prefixed name") 89 } 90 91 return ndkPrebuiltModuleToPath(ctx, flags.Toolchain, objectExtension, ctx.sdkVersion()) 92} 93 94func (*ndkPrebuiltObjectLinker) availableFor(what string) bool { 95 // ndk prebuilt objects are available to everywhere 96 return true 97} 98 99type ndkPrebuiltStlLinker struct { 100 *libraryDecorator 101} 102 103func (ndk *ndkPrebuiltStlLinker) linkerProps() []interface{} { 104 return append(ndk.libraryDecorator.linkerProps(), &ndk.Properties, &ndk.flagExporter.Properties) 105} 106 107func (*ndkPrebuiltStlLinker) linkerDeps(ctx DepsContext, deps Deps) Deps { 108 // NDK libraries can't have any dependencies 109 return deps 110} 111 112func (*ndkPrebuiltStlLinker) availableFor(what string) bool { 113 // ndk prebuilt objects are available to everywhere 114 return true 115} 116 117// ndk_prebuilt_shared_stl exports a precompiled ndk shared standard template 118// library (stl) library for linking operation. The soong's module name format 119// is ndk_<NAME>.so where the library is located under 120// ./prebuilts/ndk/current/sources/cxx-stl/llvm-libc++/libs/$(HOST_ARCH)/<NAME>.so. 121func NdkPrebuiltSharedStlFactory() android.Module { 122 module, library := NewLibrary(android.DeviceSupported) 123 library.BuildOnlyShared() 124 module.compiler = nil 125 module.linker = &ndkPrebuiltStlLinker{ 126 libraryDecorator: library, 127 } 128 module.installer = nil 129 module.Properties.Sdk_version = StringPtr("minimum") 130 module.Properties.AlwaysSdk = true 131 module.stl.Properties.Stl = StringPtr("none") 132 return module.Init() 133} 134 135// ndk_prebuilt_static_stl exports a precompiled ndk static standard template 136// library (stl) library for linking operation. The soong's module name format 137// is ndk_<NAME>.a where the library is located under 138// ./prebuilts/ndk/current/sources/cxx-stl/llvm-libc++/libs/$(HOST_ARCH)/<NAME>.a. 139func NdkPrebuiltStaticStlFactory() android.Module { 140 module, library := NewLibrary(android.DeviceSupported) 141 library.BuildOnlyStatic() 142 module.compiler = nil 143 module.linker = &ndkPrebuiltStlLinker{ 144 libraryDecorator: library, 145 } 146 module.installer = nil 147 module.Properties.Sdk_version = StringPtr("minimum") 148 module.Properties.HideFromMake = true 149 module.Properties.AlwaysSdk = true 150 module.Properties.Sdk_version = StringPtr("current") 151 module.stl.Properties.Stl = StringPtr("none") 152 return module.Init() 153} 154 155func getNdkStlLibDir(ctx android.ModuleContext) android.SourcePath { 156 libDir := "prebuilts/ndk/current/sources/cxx-stl/llvm-libc++/libs" 157 return android.PathForSource(ctx, libDir).Join(ctx, ctx.Arch().Abi[0]) 158} 159 160func (ndk *ndkPrebuiltStlLinker) link(ctx ModuleContext, flags Flags, 161 deps PathDeps, objs Objects) android.Path { 162 // A null build step, but it sets up the output path. 163 if !strings.HasPrefix(ctx.ModuleName(), "ndk_lib") { 164 ctx.ModuleErrorf("NDK prebuilt libraries must have an ndk_lib prefixed name") 165 } 166 167 ndk.libraryDecorator.flagExporter.exportIncludesAsSystem(ctx) 168 169 libName := strings.TrimPrefix(ctx.ModuleName(), "ndk_") 170 libExt := flags.Toolchain.ShlibSuffix() 171 if ndk.static() { 172 libExt = staticLibraryExtension 173 } 174 175 libDir := getNdkStlLibDir(ctx) 176 lib := libDir.Join(ctx, libName+libExt) 177 178 ndk.libraryDecorator.flagExporter.setProvider(ctx) 179 180 if ndk.static() { 181 depSet := android.NewDepSetBuilder(android.TOPOLOGICAL).Direct(lib).Build() 182 ctx.SetProvider(StaticLibraryInfoProvider, StaticLibraryInfo{ 183 StaticLibrary: lib, 184 185 TransitiveStaticLibrariesForOrdering: depSet, 186 }) 187 } else { 188 ctx.SetProvider(SharedLibraryInfoProvider, SharedLibraryInfo{ 189 SharedLibrary: lib, 190 Target: ctx.Target(), 191 }) 192 } 193 194 return lib 195} 196