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// Copyright 2017 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 (
"path/filepath"
"strings"
"android/soong/android"
)
var (
llndkLibrarySuffix = ".llndk"
)
// Creates a stub shared library based on the provided version file.
//
// Example:
//
// llndk_library {
// name: "libfoo",
// symbol_file: "libfoo.map.txt",
// export_include_dirs: ["include_vndk"],
// }
//
type llndkLibraryProperties struct {
// Relative path to the symbol map.
// An example file can be seen here: TODO(danalbert): Make an example.
Symbol_file string
// Whether to export any headers as -isystem instead of -I. Mainly for use by
// bionic/libc.
Export_headers_as_system bool
// Which headers to process with versioner. This really only handles
// bionic/libc/include right now.
Export_preprocessed_headers []string
// Whether the system library uses symbol versions.
Unversioned bool
}
type llndkStubDecorator struct {
*libraryDecorator
Properties llndkLibraryProperties
exportHeadersTimestamp android.OptionalPath
versionScriptPath android.ModuleGenPath
}
func (stub *llndkStubDecorator) compilerFlags(ctx ModuleContext, flags Flags) Flags {
flags = stub.baseCompiler.compilerFlags(ctx, flags)
return addStubLibraryCompilerFlags(flags)
}
func (stub *llndkStubDecorator) compile(ctx ModuleContext, flags Flags, deps PathDeps) Objects {
objs, versionScript := compileStubLibrary(ctx, flags, stub.Properties.Symbol_file, "current", "--vndk")
stub.versionScriptPath = versionScript
return objs
}
func (stub *llndkStubDecorator) linkerDeps(ctx DepsContext, deps Deps) Deps {
return Deps{}
}
func (stub *llndkStubDecorator) Name(name string) string {
return name + llndkLibrarySuffix
}
func (stub *llndkStubDecorator) linkerFlags(ctx ModuleContext, flags Flags) Flags {
stub.libraryDecorator.libName = strings.TrimSuffix(ctx.ModuleName(),
llndkLibrarySuffix)
return stub.libraryDecorator.linkerFlags(ctx, flags)
}
func (stub *llndkStubDecorator) processHeaders(ctx ModuleContext, srcHeaderDir string, outDir android.ModuleGenPath) android.Path {
srcDir := android.PathForModuleSrc(ctx, srcHeaderDir)
srcFiles := ctx.Glob(filepath.Join(srcDir.String(), "**/*.h"), nil)
var installPaths []android.WritablePath
for _, header := range srcFiles {
headerDir := filepath.Dir(header.String())
relHeaderDir, err := filepath.Rel(srcDir.String(), headerDir)
if err != nil {
ctx.ModuleErrorf("filepath.Rel(%q, %q) failed: %s",
srcDir.String(), headerDir, err)
continue
}
installPaths = append(installPaths, outDir.Join(ctx, relHeaderDir, header.Base()))
}
return processHeadersWithVersioner(ctx, srcDir, outDir, srcFiles, installPaths)
}
func (stub *llndkStubDecorator) link(ctx ModuleContext, flags Flags, deps PathDeps,
objs Objects) android.Path {
if !stub.Properties.Unversioned {
linkerScriptFlag := "-Wl,--version-script," + stub.versionScriptPath.String()
flags.LdFlags = append(flags.LdFlags, linkerScriptFlag)
}
if len(stub.Properties.Export_preprocessed_headers) > 0 {
genHeaderOutDir := android.PathForModuleGen(ctx, "include")
var timestampFiles android.Paths
for _, dir := range stub.Properties.Export_preprocessed_headers {
timestampFiles = append(timestampFiles, stub.processHeaders(ctx, dir, genHeaderOutDir))
}
includePrefix := "-I "
if stub.Properties.Export_headers_as_system {
includePrefix = "-isystem "
}
stub.reexportFlags([]string{includePrefix + " " + genHeaderOutDir.String()})
stub.reexportDeps(timestampFiles)
}
if stub.Properties.Export_headers_as_system {
stub.exportIncludes(ctx, "-isystem")
stub.libraryDecorator.flagExporter.Properties.Export_include_dirs = []string{}
}
return stub.libraryDecorator.link(ctx, flags, deps, objs)
}
func newLLndkStubLibrary() *Module {
module, library := NewLibrary(android.DeviceSupported)
library.BuildOnlyShared()
module.stl = nil
module.sanitize = nil
library.StripProperties.Strip.None = true
stub := &llndkStubDecorator{
libraryDecorator: library,
}
module.compiler = stub
module.linker = stub
module.installer = nil
module.AddProperties(
&stub.Properties,
&library.MutatedProperties,
&library.flagExporter.Properties)
return module
}
func llndkLibraryFactory() android.Module {
module := newLLndkStubLibrary()
android.InitAndroidArchModule(module, android.DeviceSupported, android.MultilibBoth)
return module
}
func init() {
android.RegisterModuleType("llndk_library", llndkLibraryFactory)
}
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