1 // Copyright 2017 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 15 package cc 16 17 import ( 18 "path/filepath" 19 "strings" 20 21 "android/soong/android" 22 ) 23 24 var ( 25 llndkLibrarySuffix = ".llndk" 26 llndkHeadersSuffix = ".llndk" 27 ) 28 29 // Creates a stub shared library based on the provided version file. 30 // 31 // Example: 32 // 33 // llndk_library { 34 // name: "libfoo", 35 // symbol_file: "libfoo.map.txt", 36 // export_include_dirs: ["include_vndk"], 37 // } 38 // 39 type llndkLibraryProperties struct { 40 // Relative path to the symbol map. 41 // An example file can be seen here: TODO(danalbert): Make an example. 42 Symbol_file *string 43 44 // Whether to export any headers as -isystem instead of -I. Mainly for use by 45 // bionic/libc. 46 Export_headers_as_system *bool 47 48 // Which headers to process with versioner. This really only handles 49 // bionic/libc/include right now. 50 Export_preprocessed_headers []string 51 52 // Whether the system library uses symbol versions. 53 Unversioned *bool 54 55 // whether this module can be directly depended upon by libs that are installed to /vendor. 56 // When set to false, this module can only be depended on by VNDK libraries, not vendor 57 // libraries. This effectively hides this module from vendors. Default value is true. 58 Vendor_available *bool 59 60 // list of llndk headers to re-export include directories from. 61 Export_llndk_headers []string `android:"arch_variant"` 62 } 63 64 type llndkStubDecorator struct { 65 *libraryDecorator 66 67 Properties llndkLibraryProperties 68 69 exportHeadersTimestamp android.OptionalPath 70 versionScriptPath android.ModuleGenPath 71 } 72 73 func (stub *llndkStubDecorator) compilerFlags(ctx ModuleContext, flags Flags, deps PathDeps) Flags { 74 flags = stub.baseCompiler.compilerFlags(ctx, flags, deps) 75 return addStubLibraryCompilerFlags(flags) 76 } 77 78 func (stub *llndkStubDecorator) compile(ctx ModuleContext, flags Flags, deps PathDeps) Objects { 79 vndk_ver := ctx.DeviceConfig().VndkVersion() 80 if vndk_ver == "current" { 81 platform_vndk_ver := ctx.DeviceConfig().PlatformVndkVersion() 82 if !inList(platform_vndk_ver, ctx.Config().PlatformVersionCombinedCodenames()) { 83 vndk_ver = platform_vndk_ver 84 } 85 } else if vndk_ver == "" { 86 // For non-enforcing devices, use "current" 87 vndk_ver = "current" 88 } 89 objs, versionScript := compileStubLibrary(ctx, flags, String(stub.Properties.Symbol_file), vndk_ver, "--vndk") 90 stub.versionScriptPath = versionScript 91 return objs 92 } 93 94 func (stub *llndkStubDecorator) linkerDeps(ctx DepsContext, deps Deps) Deps { 95 headers := addSuffix(stub.Properties.Export_llndk_headers, llndkHeadersSuffix) 96 deps.HeaderLibs = append(deps.HeaderLibs, headers...) 97 deps.ReexportHeaderLibHeaders = append(deps.ReexportHeaderLibHeaders, headers...) 98 return deps 99 } 100 101 func (stub *llndkStubDecorator) Name(name string) string { 102 return name + llndkLibrarySuffix 103 } 104 105 func (stub *llndkStubDecorator) linkerFlags(ctx ModuleContext, flags Flags) Flags { 106 stub.libraryDecorator.libName = strings.TrimSuffix(ctx.ModuleName(), 107 llndkLibrarySuffix) 108 return stub.libraryDecorator.linkerFlags(ctx, flags) 109 } 110 111 func (stub *llndkStubDecorator) processHeaders(ctx ModuleContext, srcHeaderDir string, outDir android.ModuleGenPath) android.Path { 112 srcDir := android.PathForModuleSrc(ctx, srcHeaderDir) 113 srcFiles := ctx.GlobFiles(filepath.Join(srcDir.String(), "**/*.h"), nil) 114 115 var installPaths []android.WritablePath 116 for _, header := range srcFiles { 117 headerDir := filepath.Dir(header.String()) 118 relHeaderDir, err := filepath.Rel(srcDir.String(), headerDir) 119 if err != nil { 120 ctx.ModuleErrorf("filepath.Rel(%q, %q) failed: %s", 121 srcDir.String(), headerDir, err) 122 continue 123 } 124 125 installPaths = append(installPaths, outDir.Join(ctx, relHeaderDir, header.Base())) 126 } 127 128 return processHeadersWithVersioner(ctx, srcDir, outDir, srcFiles, installPaths) 129 } 130 131 func (stub *llndkStubDecorator) link(ctx ModuleContext, flags Flags, deps PathDeps, 132 objs Objects) android.Path { 133 134 if !Bool(stub.Properties.Unversioned) { 135 linkerScriptFlag := "-Wl,--version-script," + stub.versionScriptPath.String() 136 flags.LdFlags = append(flags.LdFlags, linkerScriptFlag) 137 } 138 139 if len(stub.Properties.Export_preprocessed_headers) > 0 { 140 genHeaderOutDir := android.PathForModuleGen(ctx, "include") 141 142 var timestampFiles android.Paths 143 for _, dir := range stub.Properties.Export_preprocessed_headers { 144 timestampFiles = append(timestampFiles, stub.processHeaders(ctx, dir, genHeaderOutDir)) 145 } 146 147 includePrefix := "-I " 148 if Bool(stub.Properties.Export_headers_as_system) { 149 includePrefix = "-isystem " 150 } 151 152 stub.reexportFlags([]string{includePrefix + " " + genHeaderOutDir.String()}) 153 stub.reexportDeps(timestampFiles) 154 } 155 156 if Bool(stub.Properties.Export_headers_as_system) { 157 stub.exportIncludes(ctx, "-isystem") 158 stub.libraryDecorator.flagExporter.Properties.Export_include_dirs = []string{} 159 } 160 161 return stub.libraryDecorator.link(ctx, flags, deps, objs) 162 } 163 164 func NewLLndkStubLibrary() *Module { 165 module, library := NewLibrary(android.DeviceSupported) 166 library.BuildOnlyShared() 167 module.stl = nil 168 module.sanitize = nil 169 library.StripProperties.Strip.None = BoolPtr(true) 170 171 stub := &llndkStubDecorator{ 172 libraryDecorator: library, 173 } 174 stub.Properties.Vendor_available = BoolPtr(true) 175 module.compiler = stub 176 module.linker = stub 177 module.installer = nil 178 179 module.AddProperties( 180 &stub.Properties, 181 &library.MutatedProperties, 182 &library.flagExporter.Properties) 183 184 return module 185 } 186 187 func llndkLibraryFactory() android.Module { 188 module := NewLLndkStubLibrary() 189 android.InitAndroidArchModule(module, android.DeviceSupported, android.MultilibBoth) 190 return module 191 } 192 193 type llndkHeadersDecorator struct { 194 *libraryDecorator 195 } 196 197 func (headers *llndkHeadersDecorator) Name(name string) string { 198 return name + llndkHeadersSuffix 199 } 200 201 func llndkHeadersFactory() android.Module { 202 module, library := NewLibrary(android.DeviceSupported) 203 library.HeaderOnly() 204 205 decorator := &llndkHeadersDecorator{ 206 libraryDecorator: library, 207 } 208 209 module.compiler = nil 210 module.linker = decorator 211 module.installer = nil 212 213 module.AddProperties(&library.MutatedProperties, &library.flagExporter.Properties) 214 215 android.InitAndroidArchModule(module, android.DeviceSupported, android.MultilibBoth) 216 217 return module 218 } 219 220 func init() { 221 android.RegisterModuleType("llndk_library", llndkLibraryFactory) 222 android.RegisterModuleType("llndk_headers", llndkHeadersFactory) 223 } 224
