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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"
"android/soong/android"
)
//
// Objects (for crt*.o)
//
func init() {
android.RegisterModuleType("cc_object", ObjectFactory)
android.RegisterSdkMemberType(ccObjectSdkMemberType)
}
var ccObjectSdkMemberType = &librarySdkMemberType{
SdkMemberTypeBase: android.SdkMemberTypeBase{
PropertyName: "native_objects",
SupportsSdk: true,
},
prebuiltModuleType: "cc_prebuilt_object",
linkTypes: nil,
}
type objectLinker struct {
*baseLinker
Properties ObjectLinkerProperties
}
type ObjectLinkerProperties struct {
// list of modules that should only provide headers for this module.
Header_libs []string `android:"arch_variant,variant_prepend"`
// names of other cc_object modules to link into this module using partial linking
Objs []string `android:"arch_variant"`
// if set, add an extra objcopy --prefix-symbols= step
Prefix_symbols *string
// if set, the path to a linker script to pass to ld -r when combining multiple object files.
Linker_script *string `android:"path,arch_variant"`
// Indicates that this module is a CRT object. CRT objects will be split
// into a variant per-API level between min_sdk_version and current.
Crt *bool
}
func newObject() *Module {
module := newBaseModule(android.HostAndDeviceSupported, android.MultilibBoth)
module.sanitize = &sanitize{}
module.stl = &stl{}
return module
}
// cc_object runs the compiler without running the linker. It is rarely
// necessary, but sometimes used to generate .s files from .c files to use as
// input to a cc_genrule module.
func ObjectFactory() android.Module {
module := newObject()
module.linker = &objectLinker{
baseLinker: NewBaseLinker(module.sanitize),
}
module.compiler = NewBaseCompiler()
// Clang's address-significance tables are incompatible with ld -r.
module.compiler.appendCflags([]string{"-fno-addrsig"})
module.sdkMemberTypes = []android.SdkMemberType{ccObjectSdkMemberType}
return module.Init()
}
func (object *objectLinker) appendLdflags(flags []string) {
panic(fmt.Errorf("appendLdflags on objectLinker not supported"))
}
func (object *objectLinker) linkerProps() []interface{} {
return []interface{}{&object.Properties}
}
func (*objectLinker) linkerInit(ctx BaseModuleContext) {}
func (object *objectLinker) linkerDeps(ctx DepsContext, deps Deps) Deps {
deps.HeaderLibs = append(deps.HeaderLibs, object.Properties.Header_libs...)
deps.ObjFiles = append(deps.ObjFiles, object.Properties.Objs...)
return deps
}
func (object *objectLinker) linkerFlags(ctx ModuleContext, flags Flags) Flags {
flags.Global.LdFlags = append(flags.Global.LdFlags, ctx.toolchain().ToolchainClangLdflags())
if lds := android.OptionalPathForModuleSrc(ctx, object.Properties.Linker_script); lds.Valid() {
flags.Local.LdFlags = append(flags.Local.LdFlags, "-Wl,-T,"+lds.String())
flags.LdFlagsDeps = append(flags.LdFlagsDeps, lds.Path())
}
return flags
}
func (object *objectLinker) link(ctx ModuleContext,
flags Flags, deps PathDeps, objs Objects) android.Path {
objs = objs.Append(deps.Objs)
var outputFile android.Path
builderFlags := flagsToBuilderFlags(flags)
if len(objs.objFiles) == 1 && String(object.Properties.Linker_script) == "" {
outputFile = objs.objFiles[0]
if String(object.Properties.Prefix_symbols) != "" {
output := android.PathForModuleOut(ctx, ctx.ModuleName()+objectExtension)
TransformBinaryPrefixSymbols(ctx, String(object.Properties.Prefix_symbols), outputFile,
builderFlags, output)
outputFile = output
}
} else {
output := android.PathForModuleOut(ctx, ctx.ModuleName()+objectExtension)
outputFile = output
if String(object.Properties.Prefix_symbols) != "" {
input := android.PathForModuleOut(ctx, "unprefixed", ctx.ModuleName()+objectExtension)
TransformBinaryPrefixSymbols(ctx, String(object.Properties.Prefix_symbols), input,
builderFlags, output)
output = input
}
TransformObjsToObj(ctx, objs.objFiles, builderFlags, output, flags.LdFlagsDeps)
}
ctx.CheckbuildFile(outputFile)
return outputFile
}
func (object *objectLinker) unstrippedOutputFilePath() android.Path {
return nil
}
func (object *objectLinker) nativeCoverage() bool {
return true
}
func (object *objectLinker) coverageOutputFilePath() android.OptionalPath {
return android.OptionalPath{}
}
func (object *objectLinker) object() bool {
return true
}
func (object *objectLinker) isCrt() bool {
return Bool(object.Properties.Crt)
}
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