144 lines
4.3 KiB
Go
144 lines
4.3 KiB
Go
// Copyright 2016 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cc
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import (
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"fmt"
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"android/soong/android"
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)
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//
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// Objects (for crt*.o)
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//
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func init() {
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android.RegisterModuleType("cc_object", ObjectFactory)
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}
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type objectLinker struct {
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*baseLinker
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Properties ObjectLinkerProperties
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}
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type ObjectLinkerProperties struct {
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// list of modules that should only provide headers for this module.
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Header_libs []string `android:"arch_variant,variant_prepend"`
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// names of other cc_object modules to link into this module using partial linking
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Objs []string `android:"arch_variant"`
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// if set, add an extra objcopy --prefix-symbols= step
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Prefix_symbols *string
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// if set, the path to a linker script to pass to ld -r when combining multiple object files.
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Linker_script *string `android:"path,arch_variant"`
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}
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// cc_object runs the compiler without running the linker. It is rarely
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// necessary, but sometimes used to generate .s files from .c files to use as
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// input to a cc_genrule module.
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func ObjectFactory() android.Module {
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module := newBaseModule(android.HostAndDeviceSupported, android.MultilibBoth)
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module.linker = &objectLinker{
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baseLinker: NewBaseLinker(nil),
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}
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module.compiler = NewBaseCompiler()
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// Clang's address-significance tables are incompatible with ld -r.
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module.compiler.appendCflags([]string{"-fno-addrsig"})
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module.stl = &stl{}
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return module.Init()
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}
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func (object *objectLinker) appendLdflags(flags []string) {
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panic(fmt.Errorf("appendLdflags on objectLinker not supported"))
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}
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func (object *objectLinker) linkerProps() []interface{} {
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return []interface{}{&object.Properties}
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}
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func (*objectLinker) linkerInit(ctx BaseModuleContext) {}
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func (object *objectLinker) linkerDeps(ctx DepsContext, deps Deps) Deps {
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if ctx.useVndk() && ctx.toolchain().Bionic() {
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// Needed for VNDK builds where bionic headers aren't automatically added.
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deps.LateSharedLibs = append(deps.LateSharedLibs, "libc")
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}
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deps.HeaderLibs = append(deps.HeaderLibs, object.Properties.Header_libs...)
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deps.ObjFiles = append(deps.ObjFiles, object.Properties.Objs...)
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return deps
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}
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func (object *objectLinker) linkerFlags(ctx ModuleContext, flags Flags) Flags {
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flags.LdFlags = append(flags.LdFlags, ctx.toolchain().ToolchainClangLdflags())
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if lds := android.OptionalPathForModuleSrc(ctx, object.Properties.Linker_script); lds.Valid() {
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flags.LdFlags = append(flags.LdFlags, "-Wl,-T,"+lds.String())
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flags.LdFlagsDeps = append(flags.LdFlagsDeps, lds.Path())
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}
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return flags
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}
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func (object *objectLinker) link(ctx ModuleContext,
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flags Flags, deps PathDeps, objs Objects) android.Path {
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objs = objs.Append(deps.Objs)
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var outputFile android.Path
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builderFlags := flagsToBuilderFlags(flags)
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if len(objs.objFiles) == 1 {
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outputFile = objs.objFiles[0]
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if String(object.Properties.Prefix_symbols) != "" {
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output := android.PathForModuleOut(ctx, ctx.ModuleName()+objectExtension)
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TransformBinaryPrefixSymbols(ctx, String(object.Properties.Prefix_symbols), outputFile,
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builderFlags, output)
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outputFile = output
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}
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} else {
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output := android.PathForModuleOut(ctx, ctx.ModuleName()+objectExtension)
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outputFile = output
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if String(object.Properties.Prefix_symbols) != "" {
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input := android.PathForModuleOut(ctx, "unprefixed", ctx.ModuleName()+objectExtension)
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TransformBinaryPrefixSymbols(ctx, String(object.Properties.Prefix_symbols), input,
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builderFlags, output)
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output = input
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}
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TransformObjsToObj(ctx, objs.objFiles, builderFlags, output)
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}
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ctx.CheckbuildFile(outputFile)
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return outputFile
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}
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func (object *objectLinker) unstrippedOutputFilePath() android.Path {
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return nil
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}
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func (object *objectLinker) nativeCoverage() bool {
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return true
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}
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func (object *objectLinker) coverageOutputFilePath() android.OptionalPath {
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return android.OptionalPath{}
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}
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