cc/gen.go - android_build_soong - Gitiles

 // Copyright 2015 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/aidl_library"
 	"android/soong/bazel"

 	"github.com/google/blueprint"

 	"android/soong/android"
 )

 func init() {
 	pctx.SourcePathVariable("lexCmd", "prebuilts/build-tools/${config.HostPrebuiltTag}/bin/flex")
 	pctx.SourcePathVariable("m4Cmd", "prebuilts/build-tools/${config.HostPrebuiltTag}/bin/m4")

 	pctx.HostBinToolVariable("aidlCmd", "aidl-cpp")
 	pctx.HostBinToolVariable("syspropCmd", "sysprop_cpp")
 }

 var (
 	lex = pctx.AndroidStaticRule("lex",
 		blueprint.RuleParams{
 			Command:     "M4=$m4Cmd $lexCmd $flags -o$out $in",
 			CommandDeps: []string{"$lexCmd", "$m4Cmd"},
 		}, "flags")

 	sysprop = pctx.AndroidStaticRule("sysprop",
 		blueprint.RuleParams{
 			Command: "$syspropCmd --header-dir=$headerOutDir --public-header-dir=$publicOutDir " +
 				"--source-dir=$srcOutDir --include-name=$includeName $in",
 			CommandDeps: []string{"$syspropCmd"},
 		},
 		"headerOutDir", "publicOutDir", "srcOutDir", "includeName")
 )

 type YaccProperties struct {
 	// list of module-specific flags that will be used for .y and .yy compiles
 	Flags []string

 	// whether the yacc files will produce a location.hh file
 	Gen_location_hh *bool

 	// whether the yacc files will product a position.hh file
 	Gen_position_hh *bool
 }

 func genYacc(ctx android.ModuleContext, rule *android.RuleBuilder, yaccFile android.Path,
 	outFile android.ModuleGenPath, props *YaccProperties) (headerFiles android.Paths) {

 	outDir := android.PathForModuleGen(ctx, "yacc")
 	headerFile := android.GenPathWithExt(ctx, "yacc", yaccFile, "h")
 	ret := android.Paths{headerFile}

 	cmd := rule.Command()

 	// Fix up #line markers to not use the sbox temporary directory
 	// android.sboxPathForOutput(outDir, outDir) returns the sbox placeholder for the out
 	// directory itself, without any filename appended.
 	sboxOutDir := cmd.PathForOutput(outDir)
 	sedCmd := "sed -i.bak 's#" + sboxOutDir + "#" + outDir.String() + "#'"
 	rule.Command().Text(sedCmd).Input(outFile)
 	rule.Command().Text(sedCmd).Input(headerFile)

 	var flags []string
 	if props != nil {
 		flags = props.Flags

 		if Bool(props.Gen_location_hh) {
 			locationHeader := outFile.InSameDir(ctx, "location.hh")
 			ret = append(ret, locationHeader)
 			cmd.ImplicitOutput(locationHeader)
 			rule.Command().Text(sedCmd).Input(locationHeader)
 		}
 		if Bool(props.Gen_position_hh) {
 			positionHeader := outFile.InSameDir(ctx, "position.hh")
 			ret = append(ret, positionHeader)
 			cmd.ImplicitOutput(positionHeader)
 			rule.Command().Text(sedCmd).Input(positionHeader)
 		}
 	}

 	cmd.Text("BISON_PKGDATADIR=prebuilts/build-tools/common/bison").
 		FlagWithInput("M4=", ctx.Config().PrebuiltBuildTool(ctx, "m4")).
 		PrebuiltBuildTool(ctx, "bison").
 		Flag("-d").
 		Flags(flags).
 		FlagWithOutput("--defines=", headerFile).
 		Flag("-o").Output(outFile).Input(yaccFile)

 	return ret
 }

 func genAidl(
 	ctx android.ModuleContext,
 	rule *android.RuleBuilder,
 	outDirBase string,
 	aidlFile android.Path,
 	aidlHdrs android.Paths,
 	aidlFlags string,
 ) (cppFile android.OutputPath, headerFiles android.Paths) {
 	aidlPackage := strings.TrimSuffix(aidlFile.Rel(), aidlFile.Base())
 	baseName := strings.TrimSuffix(aidlFile.Base(), aidlFile.Ext())
 	shortName := baseName
 	// TODO(b/111362593): aidl_to_cpp_common.cpp uses heuristics to figure out if
 	//   an interface name has a leading I. Those same heuristics have been
 	//   moved here.
 	if len(baseName) >= 2 && baseName[0] == 'I' &&
 		strings.ToUpper(baseName)[1] == baseName[1] {
 		shortName = strings.TrimPrefix(baseName, "I")
 	}

 	outDir := android.PathForModuleGen(ctx, outDirBase)
 	cppFile = outDir.Join(ctx, aidlPackage, baseName+".cpp")
 	depFile := outDir.Join(ctx, aidlPackage, baseName+".cpp.d")
 	headerI := outDir.Join(ctx, aidlPackage, baseName+".h")
 	headerBn := outDir.Join(ctx, aidlPackage, "Bn"+shortName+".h")
 	headerBp := outDir.Join(ctx, aidlPackage, "Bp"+shortName+".h")

 	cmd := rule.Command()
 	cmd.BuiltTool("aidl-cpp").
 		// libc++ is default stl for aidl-cpp (a cc_binary_host module)
 		ImplicitTool(ctx.Config().HostCcSharedLibPath(ctx, "libc++")).
 		FlagWithDepFile("-d", depFile).
 		Flag("--ninja").
 		Flag(aidlFlags).
 		Input(aidlFile).
 		OutputDir().
 		Output(cppFile).
 		ImplicitOutputs(android.WritablePaths{
 			headerI,
 			headerBn,
 			headerBp,
 		})

 	if aidlHdrs != nil {
 		cmd.Implicits(aidlHdrs)
 	}

 	return cppFile, android.Paths{
 		headerI,
 		headerBn,
 		headerBp,
 	}
 }

 type LexProperties struct {
 	// list of module-specific flags that will be used for .l and .ll compiles
 	Flags []string
 }

 func genLex(ctx android.ModuleContext, lexFile android.Path, outFile android.ModuleGenPath, props *LexProperties) {
 	var flags []string
 	if props != nil {
 		flags = props.Flags
 	}
 	flagsString := strings.Join(flags[:], " ")
 	ctx.Build(pctx, android.BuildParams{
 		Rule:        lex,
 		Description: "lex " + lexFile.Rel(),
 		Output:      outFile,
 		Input:       lexFile,
 		Args:        map[string]string{"flags": flagsString},
 	})
 }

 type LexAttrs struct {
 	Srcs    bazel.LabelListAttribute
 	Lexopts bazel.StringListAttribute
 }

 type LexNames struct {
 	cSrcName bazel.LabelAttribute
 	srcName  bazel.LabelAttribute
 }

 func bp2BuildLex(ctx android.Bp2buildMutatorContext, moduleName string, ca compilerAttributes) LexNames {
 	names := LexNames{}
 	if !ca.lSrcs.IsEmpty() {
 		names.cSrcName = createLexTargetModule(ctx, moduleName+"_genlex_l", ca.lSrcs, ca.lexopts)
 	}
 	if !ca.llSrcs.IsEmpty() {
 		names.srcName = createLexTargetModule(ctx, moduleName+"_genlex_ll", ca.llSrcs, ca.lexopts)
 	}
 	return names
 }

 func createLexTargetModule(ctx android.Bp2buildMutatorContext, name string, srcs bazel.LabelListAttribute, opts bazel.StringListAttribute) bazel.LabelAttribute {
 	ctx.CreateBazelTargetModule(
 		bazel.BazelTargetModuleProperties{
 			Rule_class:        "genlex",
 			Bzl_load_location: "//build/bazel/rules/cc:flex.bzl",
 		},
 		android.CommonAttributes{Name: name},
 		&LexAttrs{
 			Srcs:    srcs,
 			Lexopts: opts,
 		})
 	return bazel.LabelAttribute{Value: &bazel.Label{Label: ":" + name}}
 }

 func genSysprop(ctx android.ModuleContext, syspropFile android.Path) (android.Path, android.Paths) {
 	headerFile := android.PathForModuleGen(ctx, "sysprop", "include", syspropFile.Rel()+".h")
 	publicHeaderFile := android.PathForModuleGen(ctx, "sysprop/public", "include", syspropFile.Rel()+".h")
 	cppFile := android.PathForModuleGen(ctx, "sysprop", syspropFile.Rel()+".cpp")

 	headers := android.WritablePaths{headerFile, publicHeaderFile}

 	ctx.Build(pctx, android.BuildParams{
 		Rule:            sysprop,
 		Description:     "sysprop " + syspropFile.Rel(),
 		Output:          cppFile,
 		ImplicitOutputs: headers,
 		Input:           syspropFile,
 		Args: map[string]string{
 			"headerOutDir": filepath.Dir(headerFile.String()),
 			"publicOutDir": filepath.Dir(publicHeaderFile.String()),
 			"srcOutDir":    filepath.Dir(cppFile.String()),
 			"includeName":  syspropFile.Rel() + ".h",
 		},
 	})

 	return cppFile, headers.Paths()
 }

 func bp2buildCcSysprop(ctx android.Bp2buildMutatorContext, moduleName string, minSdkVersion *string, srcs bazel.LabelListAttribute) *bazel.LabelAttribute {
 	labels := SyspropLibraryLabels{
 		SyspropLibraryLabel: moduleName + "_sysprop_library",
 		StaticLibraryLabel:  moduleName + "_cc_sysprop_library_static",
 	}
 	Bp2buildSysprop(ctx, labels, srcs, minSdkVersion)
 	return createLabelAttributeCorrespondingToSrcs(":"+labels.StaticLibraryLabel, srcs)
 }

 // Creates a LabelAttribute for a given label where the value is only set for
 // the same config values that have values in a given LabelListAttribute
 func createLabelAttributeCorrespondingToSrcs(baseLabelName string, srcs bazel.LabelListAttribute) *bazel.LabelAttribute {
 	baseLabel := bazel.Label{Label: baseLabelName}
 	label := bazel.LabelAttribute{}
 	if !srcs.Value.IsNil() && !srcs.Value.IsEmpty() {
 		label.Value = &baseLabel
 		return &label
 	}
 	for axis, configToSrcs := range srcs.ConfigurableValues {
 		for config, val := range configToSrcs {
 			if !val.IsNil() && !val.IsEmpty() {
 				label.SetSelectValue(axis, config, baseLabel)
 			}
 		}
 	}
 	return &label
 }

 // Used to communicate information from the genSources method back to the library code that uses
 // it.
 type generatedSourceInfo struct {
 	// The headers created from .proto files
 	protoHeaders android.Paths

 	// The files that can be used as order only dependencies in order to ensure that the proto header
 	// files are up to date.
 	protoOrderOnlyDeps android.Paths

 	// The headers created from .aidl files
 	aidlHeaders android.Paths

 	// The files that can be used as order only dependencies in order to ensure that the aidl header
 	// files are up to date.
 	aidlOrderOnlyDeps android.Paths

 	// The headers created from .sysprop files
 	syspropHeaders android.Paths

 	// The files that can be used as order only dependencies in order to ensure that the sysprop
 	// header files are up to date.
 	syspropOrderOnlyDeps android.Paths
 }

 func genSources(
 	ctx android.ModuleContext,
 	aidlLibraryInfos []aidl_library.AidlLibraryInfo,
 	srcFiles android.Paths,
 	buildFlags builderFlags,
 ) (android.Paths, android.Paths, generatedSourceInfo) {

 	var info generatedSourceInfo

 	var deps android.Paths
 	var rsFiles android.Paths

 	// aidlRule supports compiling aidl files from srcs prop while aidlLibraryRule supports
 	// compiling aidl files from aidl_library modules specified in aidl.libs prop.
 	// The rules are separated so that they don't wipe out the other's outputDir
 	var aidlRule *android.RuleBuilder
 	var aidlLibraryRule *android.RuleBuilder

 	var yaccRule_ *android.RuleBuilder
 	yaccRule := func() *android.RuleBuilder {
 		if yaccRule_ == nil {
 			yaccRule_ = android.NewRuleBuilder(pctx, ctx).Sbox(android.PathForModuleGen(ctx, "yacc"),
 				android.PathForModuleGen(ctx, "yacc.sbox.textproto"))
 		}
 		return yaccRule_
 	}

 	for i, srcFile := range srcFiles {
 		switch srcFile.Ext() {
 		case ".y":
 			cFile := android.GenPathWithExt(ctx, "yacc", srcFile, "c")
 			srcFiles[i] = cFile
 			deps = append(deps, genYacc(ctx, yaccRule(), srcFile, cFile, buildFlags.yacc)...)
 		case ".yy":
 			cppFile := android.GenPathWithExt(ctx, "yacc", srcFile, "cpp")
 			srcFiles[i] = cppFile
 			deps = append(deps, genYacc(ctx, yaccRule(), srcFile, cppFile, buildFlags.yacc)...)
 		case ".l":
 			cFile := android.GenPathWithExt(ctx, "lex", srcFile, "c")
 			srcFiles[i] = cFile
 			genLex(ctx, srcFile, cFile, buildFlags.lex)
 		case ".ll":
 			cppFile := android.GenPathWithExt(ctx, "lex", srcFile, "cpp")
 			srcFiles[i] = cppFile
 			genLex(ctx, srcFile, cppFile, buildFlags.lex)
 		case ".proto":
 			ccFile, headerFile := genProto(ctx, srcFile, buildFlags)
 			srcFiles[i] = ccFile
 			info.protoHeaders = append(info.protoHeaders, headerFile)
 			// Use the generated header as an order only dep to ensure that it is up to date when needed.
 			info.protoOrderOnlyDeps = append(info.protoOrderOnlyDeps, headerFile)
 		case ".aidl":
 			if aidlRule == nil {
 				aidlRule = android.NewRuleBuilder(pctx, ctx).Sbox(android.PathForModuleGen(ctx, "aidl"),
 					android.PathForModuleGen(ctx, "aidl.sbox.textproto"))
 			}
 			baseDir := strings.TrimSuffix(srcFile.String(), srcFile.Rel())
 			cppFile, aidlHeaders := genAidl(
 				ctx,
 				aidlRule,
 				"aidl",
 				srcFile,
 				nil,
 				buildFlags.aidlFlags+" -I"+baseDir,
 			)
 			srcFiles[i] = cppFile

 			info.aidlHeaders = append(info.aidlHeaders, aidlHeaders...)
 			// Use the generated headers as order only deps to ensure that they are up to date when
 			// needed.
 			// TODO: Reduce the size of the ninja file by using one order only dep for the whole rule
 			info.aidlOrderOnlyDeps = append(info.aidlOrderOnlyDeps, aidlHeaders...)
 		case ".rscript", ".fs":
 			cppFile := rsGeneratedCppFile(ctx, srcFile)
 			rsFiles = append(rsFiles, srcFiles[i])
 			srcFiles[i] = cppFile
 		case ".sysprop":
 			cppFile, headerFiles := genSysprop(ctx, srcFile)
 			srcFiles[i] = cppFile
 			info.syspropHeaders = append(info.syspropHeaders, headerFiles...)
 			// Use the generated headers as order only deps to ensure that they are up to date when
 			// needed.
 			info.syspropOrderOnlyDeps = append(info.syspropOrderOnlyDeps, headerFiles...)
 		}
 	}

 	for _, aidlLibraryInfo := range aidlLibraryInfos {
 		if aidlLibraryRule == nil {
 			aidlLibraryRule = android.NewRuleBuilder(pctx, ctx).Sbox(
 				android.PathForModuleGen(ctx, "aidl_library"),
 				android.PathForModuleGen(ctx, "aidl_library.sbox.textproto"),
 			).SandboxInputs()
 		}
 		for _, aidlSrc := range aidlLibraryInfo.Srcs {
 			cppFile, aidlHeaders := genAidl(
 				ctx,
 				aidlLibraryRule,
 				"aidl_library",
 				aidlSrc,
 				aidlLibraryInfo.Hdrs.ToList(),
 				buildFlags.aidlFlags,
 			)

 			srcFiles = append(srcFiles, cppFile)
 			info.aidlHeaders = append(info.aidlHeaders, aidlHeaders...)
 			// Use the generated headers as order only deps to ensure that they are up to date when
 			// needed.
 			// TODO: Reduce the size of the ninja file by using one order only dep for the whole rule
 			info.aidlOrderOnlyDeps = append(info.aidlOrderOnlyDeps, aidlHeaders...)
 		}
 	}

 	if aidlRule != nil {
 		aidlRule.Build("aidl", "gen aidl")
 	}

 	if aidlLibraryRule != nil {
 		aidlLibraryRule.Build("aidl_library", "gen aidl_library")
 	}

 	if yaccRule_ != nil {
 		yaccRule_.Build("yacc", "gen yacc")
 	}

 	deps = append(deps, info.protoOrderOnlyDeps...)
 	deps = append(deps, info.aidlOrderOnlyDeps...)
 	deps = append(deps, info.syspropOrderOnlyDeps...)

 	if len(rsFiles) > 0 {
 		deps = append(deps, rsGenerateCpp(ctx, rsFiles, buildFlags.rsFlags)...)
 	}

 	return srcFiles, deps, info
 }
	// Copyright 2015 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/aidl_library"
	"android/soong/bazel"

	"github.com/google/blueprint"

	"android/soong/android"
	)

	func init() {
	pctx.SourcePathVariable("lexCmd", "prebuilts/build-tools/${config.HostPrebuiltTag}/bin/flex")
	pctx.SourcePathVariable("m4Cmd", "prebuilts/build-tools/${config.HostPrebuiltTag}/bin/m4")

	pctx.HostBinToolVariable("aidlCmd", "aidl-cpp")
	pctx.HostBinToolVariable("syspropCmd", "sysprop_cpp")
	}

	var (
	lex = pctx.AndroidStaticRule("lex",
	blueprint.RuleParams{
	Command: "M4=$m4Cmd $lexCmd $flags -o$out $in",
	CommandDeps: []string{"$lexCmd", "$m4Cmd"},
	}, "flags")

	sysprop = pctx.AndroidStaticRule("sysprop",
	blueprint.RuleParams{
	Command: "$syspropCmd --header-dir=$headerOutDir --public-header-dir=$publicOutDir " +
	"--source-dir=$srcOutDir --include-name=$includeName $in",
	CommandDeps: []string{"$syspropCmd"},
	},
	"headerOutDir", "publicOutDir", "srcOutDir", "includeName")
	)

	type YaccProperties struct {
	// list of module-specific flags that will be used for .y and .yy compiles
	Flags []string

	// whether the yacc files will produce a location.hh file
	Gen_location_hh *bool

	// whether the yacc files will product a position.hh file
	Gen_position_hh *bool
	}

	func genYacc(ctx android.ModuleContext, rule *android.RuleBuilder, yaccFile android.Path,
	outFile android.ModuleGenPath, props *YaccProperties) (headerFiles android.Paths) {

	outDir := android.PathForModuleGen(ctx, "yacc")
	headerFile := android.GenPathWithExt(ctx, "yacc", yaccFile, "h")
	ret := android.Paths{headerFile}

	cmd := rule.Command()

	// Fix up #line markers to not use the sbox temporary directory
	// android.sboxPathForOutput(outDir, outDir) returns the sbox placeholder for the out
	// directory itself, without any filename appended.
	sboxOutDir := cmd.PathForOutput(outDir)
	sedCmd := "sed -i.bak 's#" + sboxOutDir + "#" + outDir.String() + "#'"
	rule.Command().Text(sedCmd).Input(outFile)
	rule.Command().Text(sedCmd).Input(headerFile)

	var flags []string
	if props != nil {
	flags = props.Flags

	if Bool(props.Gen_location_hh) {
	locationHeader := outFile.InSameDir(ctx, "location.hh")
	ret = append(ret, locationHeader)
	cmd.ImplicitOutput(locationHeader)
	rule.Command().Text(sedCmd).Input(locationHeader)
	}
	if Bool(props.Gen_position_hh) {
	positionHeader := outFile.InSameDir(ctx, "position.hh")
	ret = append(ret, positionHeader)
	cmd.ImplicitOutput(positionHeader)
	rule.Command().Text(sedCmd).Input(positionHeader)
	}
	}

	cmd.Text("BISON_PKGDATADIR=prebuilts/build-tools/common/bison").
	FlagWithInput("M4=", ctx.Config().PrebuiltBuildTool(ctx, "m4")).
	PrebuiltBuildTool(ctx, "bison").
	Flag("-d").
	Flags(flags).
	FlagWithOutput("--defines=", headerFile).
	Flag("-o").Output(outFile).Input(yaccFile)

	return ret
	}

	func genAidl(
	ctx android.ModuleContext,
	rule *android.RuleBuilder,
	outDirBase string,
	aidlFile android.Path,
	aidlHdrs android.Paths,
	aidlFlags string,
	) (cppFile android.OutputPath, headerFiles android.Paths) {
	aidlPackage := strings.TrimSuffix(aidlFile.Rel(), aidlFile.Base())
	baseName := strings.TrimSuffix(aidlFile.Base(), aidlFile.Ext())
	shortName := baseName
	// TODO(b/111362593): aidl_to_cpp_common.cpp uses heuristics to figure out if
	// an interface name has a leading I. Those same heuristics have been
	// moved here.
	if len(baseName) >= 2 && baseName[0] == 'I' &&
	strings.ToUpper(baseName)[1] == baseName[1] {
	shortName = strings.TrimPrefix(baseName, "I")
	}

	outDir := android.PathForModuleGen(ctx, outDirBase)
	cppFile = outDir.Join(ctx, aidlPackage, baseName+".cpp")
	depFile := outDir.Join(ctx, aidlPackage, baseName+".cpp.d")
	headerI := outDir.Join(ctx, aidlPackage, baseName+".h")
	headerBn := outDir.Join(ctx, aidlPackage, "Bn"+shortName+".h")
	headerBp := outDir.Join(ctx, aidlPackage, "Bp"+shortName+".h")

	cmd := rule.Command()
	cmd.BuiltTool("aidl-cpp").
	// libc++ is default stl for aidl-cpp (a cc_binary_host module)
	ImplicitTool(ctx.Config().HostCcSharedLibPath(ctx, "libc++")).
	FlagWithDepFile("-d", depFile).
	Flag("--ninja").
	Flag(aidlFlags).
	Input(aidlFile).
	OutputDir().
	Output(cppFile).
	ImplicitOutputs(android.WritablePaths{
	headerI,
	headerBn,
	headerBp,
	})

	if aidlHdrs != nil {
	cmd.Implicits(aidlHdrs)
	}

	return cppFile, android.Paths{
	headerI,
	headerBn,
	headerBp,
	}
	}

	type LexProperties struct {
	// list of module-specific flags that will be used for .l and .ll compiles
	Flags []string
	}

	func genLex(ctx android.ModuleContext, lexFile android.Path, outFile android.ModuleGenPath, props *LexProperties) {
	var flags []string
	if props != nil {
	flags = props.Flags
	}
	flagsString := strings.Join(flags[:], " ")
	ctx.Build(pctx, android.BuildParams{
	Rule: lex,
	Description: "lex " + lexFile.Rel(),
	Output: outFile,
	Input: lexFile,
	Args: map[string]string{"flags": flagsString},
	})
	}

	type LexAttrs struct {
	Srcs bazel.LabelListAttribute
	Lexopts bazel.StringListAttribute
	}

	type LexNames struct {
	cSrcName bazel.LabelAttribute
	srcName bazel.LabelAttribute
	}

	func bp2BuildLex(ctx android.Bp2buildMutatorContext, moduleName string, ca compilerAttributes) LexNames {
	names := LexNames{}
	if !ca.lSrcs.IsEmpty() {
	names.cSrcName = createLexTargetModule(ctx, moduleName+"_genlex_l", ca.lSrcs, ca.lexopts)
	}
	if !ca.llSrcs.IsEmpty() {
	names.srcName = createLexTargetModule(ctx, moduleName+"_genlex_ll", ca.llSrcs, ca.lexopts)
	}
	return names
	}

	func createLexTargetModule(ctx android.Bp2buildMutatorContext, name string, srcs bazel.LabelListAttribute, opts bazel.StringListAttribute) bazel.LabelAttribute {
	ctx.CreateBazelTargetModule(
	bazel.BazelTargetModuleProperties{
	Rule_class: "genlex",
	Bzl_load_location: "//build/bazel/rules/cc:flex.bzl",
	},
	android.CommonAttributes{Name: name},
	&LexAttrs{
	Srcs: srcs,
	Lexopts: opts,
	})
	return bazel.LabelAttribute{Value: &bazel.Label{Label: ":" + name}}
	}

	func genSysprop(ctx android.ModuleContext, syspropFile android.Path) (android.Path, android.Paths) {
	headerFile := android.PathForModuleGen(ctx, "sysprop", "include", syspropFile.Rel()+".h")
	publicHeaderFile := android.PathForModuleGen(ctx, "sysprop/public", "include", syspropFile.Rel()+".h")
	cppFile := android.PathForModuleGen(ctx, "sysprop", syspropFile.Rel()+".cpp")

	headers := android.WritablePaths{headerFile, publicHeaderFile}

	ctx.Build(pctx, android.BuildParams{
	Rule: sysprop,
	Description: "sysprop " + syspropFile.Rel(),
	Output: cppFile,
	ImplicitOutputs: headers,
	Input: syspropFile,
	Args: map[string]string{
	"headerOutDir": filepath.Dir(headerFile.String()),
	"publicOutDir": filepath.Dir(publicHeaderFile.String()),
	"srcOutDir": filepath.Dir(cppFile.String()),
	"includeName": syspropFile.Rel() + ".h",
	},
	})

	return cppFile, headers.Paths()
	}

	func bp2buildCcSysprop(ctx android.Bp2buildMutatorContext, moduleName string, minSdkVersion string, srcs bazel.LabelListAttribute) bazel.LabelAttribute {
	labels := SyspropLibraryLabels{
	SyspropLibraryLabel: moduleName + "_sysprop_library",
	StaticLibraryLabel: moduleName + "_cc_sysprop_library_static",
	}
	Bp2buildSysprop(ctx, labels, srcs, minSdkVersion)
	return createLabelAttributeCorrespondingToSrcs(":"+labels.StaticLibraryLabel, srcs)
	}

	// Creates a LabelAttribute for a given label where the value is only set for
	// the same config values that have values in a given LabelListAttribute
	func createLabelAttributeCorrespondingToSrcs(baseLabelName string, srcs bazel.LabelListAttribute) *bazel.LabelAttribute {
	baseLabel := bazel.Label{Label: baseLabelName}
	label := bazel.LabelAttribute{}
	if !srcs.Value.IsNil() && !srcs.Value.IsEmpty() {
	label.Value = &baseLabel
	return &label
	}
	for axis, configToSrcs := range srcs.ConfigurableValues {
	for config, val := range configToSrcs {
	if !val.IsNil() && !val.IsEmpty() {
	label.SetSelectValue(axis, config, baseLabel)
	}
	}
	}
	return &label
	}

	// Used to communicate information from the genSources method back to the library code that uses
	// it.
	type generatedSourceInfo struct {
	// The headers created from .proto files
	protoHeaders android.Paths

	// The files that can be used as order only dependencies in order to ensure that the proto header
	// files are up to date.
	protoOrderOnlyDeps android.Paths

	// The headers created from .aidl files
	aidlHeaders android.Paths

	// The files that can be used as order only dependencies in order to ensure that the aidl header
	// files are up to date.
	aidlOrderOnlyDeps android.Paths

	// The headers created from .sysprop files
	syspropHeaders android.Paths

	// The files that can be used as order only dependencies in order to ensure that the sysprop
	// header files are up to date.
	syspropOrderOnlyDeps android.Paths
	}

	func genSources(
	ctx android.ModuleContext,
	aidlLibraryInfos []aidl_library.AidlLibraryInfo,
	srcFiles android.Paths,
	buildFlags builderFlags,
	) (android.Paths, android.Paths, generatedSourceInfo) {

	var info generatedSourceInfo

	var deps android.Paths
	var rsFiles android.Paths

	// aidlRule supports compiling aidl files from srcs prop while aidlLibraryRule supports
	// compiling aidl files from aidl_library modules specified in aidl.libs prop.
	// The rules are separated so that they don't wipe out the other's outputDir
	var aidlRule *android.RuleBuilder
	var aidlLibraryRule *android.RuleBuilder

	var yaccRule_ *android.RuleBuilder
	yaccRule := func() *android.RuleBuilder {
	if yaccRule_ == nil {
	yaccRule_ = android.NewRuleBuilder(pctx, ctx).Sbox(android.PathForModuleGen(ctx, "yacc"),
	android.PathForModuleGen(ctx, "yacc.sbox.textproto"))
	}
	return yaccRule_
	}

	for i, srcFile := range srcFiles {
	switch srcFile.Ext() {
	case ".y":
	cFile := android.GenPathWithExt(ctx, "yacc", srcFile, "c")
	srcFiles[i] = cFile
	deps = append(deps, genYacc(ctx, yaccRule(), srcFile, cFile, buildFlags.yacc)...)
	case ".yy":
	cppFile := android.GenPathWithExt(ctx, "yacc", srcFile, "cpp")
	srcFiles[i] = cppFile
	deps = append(deps, genYacc(ctx, yaccRule(), srcFile, cppFile, buildFlags.yacc)...)
	case ".l":
	cFile := android.GenPathWithExt(ctx, "lex", srcFile, "c")
	srcFiles[i] = cFile
	genLex(ctx, srcFile, cFile, buildFlags.lex)
	case ".ll":
	cppFile := android.GenPathWithExt(ctx, "lex", srcFile, "cpp")
	srcFiles[i] = cppFile
	genLex(ctx, srcFile, cppFile, buildFlags.lex)
	case ".proto":
	ccFile, headerFile := genProto(ctx, srcFile, buildFlags)
	srcFiles[i] = ccFile
	info.protoHeaders = append(info.protoHeaders, headerFile)
	// Use the generated header as an order only dep to ensure that it is up to date when needed.
	info.protoOrderOnlyDeps = append(info.protoOrderOnlyDeps, headerFile)
	case ".aidl":
	if aidlRule == nil {
	aidlRule = android.NewRuleBuilder(pctx, ctx).Sbox(android.PathForModuleGen(ctx, "aidl"),
	android.PathForModuleGen(ctx, "aidl.sbox.textproto"))
	}
	baseDir := strings.TrimSuffix(srcFile.String(), srcFile.Rel())
	cppFile, aidlHeaders := genAidl(
	ctx,
	aidlRule,
	"aidl",
	srcFile,
	nil,
	buildFlags.aidlFlags+" -I"+baseDir,
	)
	srcFiles[i] = cppFile

	info.aidlHeaders = append(info.aidlHeaders, aidlHeaders...)
	// Use the generated headers as order only deps to ensure that they are up to date when
	// needed.
	// TODO: Reduce the size of the ninja file by using one order only dep for the whole rule
	info.aidlOrderOnlyDeps = append(info.aidlOrderOnlyDeps, aidlHeaders...)
	case ".rscript", ".fs":
	cppFile := rsGeneratedCppFile(ctx, srcFile)
	rsFiles = append(rsFiles, srcFiles[i])
	srcFiles[i] = cppFile
	case ".sysprop":
	cppFile, headerFiles := genSysprop(ctx, srcFile)
	srcFiles[i] = cppFile
	info.syspropHeaders = append(info.syspropHeaders, headerFiles...)
	// Use the generated headers as order only deps to ensure that they are up to date when
	// needed.
	info.syspropOrderOnlyDeps = append(info.syspropOrderOnlyDeps, headerFiles...)
	}
	}

	for _, aidlLibraryInfo := range aidlLibraryInfos {
	if aidlLibraryRule == nil {
	aidlLibraryRule = android.NewRuleBuilder(pctx, ctx).Sbox(
	android.PathForModuleGen(ctx, "aidl_library"),
	android.PathForModuleGen(ctx, "aidl_library.sbox.textproto"),
	).SandboxInputs()
	}
	for _, aidlSrc := range aidlLibraryInfo.Srcs {
	cppFile, aidlHeaders := genAidl(
	ctx,
	aidlLibraryRule,
	"aidl_library",
	aidlSrc,
	aidlLibraryInfo.Hdrs.ToList(),
	buildFlags.aidlFlags,
	)

	srcFiles = append(srcFiles, cppFile)
	info.aidlHeaders = append(info.aidlHeaders, aidlHeaders...)
	// Use the generated headers as order only deps to ensure that they are up to date when
	// needed.
	// TODO: Reduce the size of the ninja file by using one order only dep for the whole rule
	info.aidlOrderOnlyDeps = append(info.aidlOrderOnlyDeps, aidlHeaders...)
	}
	}

	if aidlRule != nil {
	aidlRule.Build("aidl", "gen aidl")
	}

	if aidlLibraryRule != nil {
	aidlLibraryRule.Build("aidl_library", "gen aidl_library")
	}

	if yaccRule_ != nil {
	yaccRule_.Build("yacc", "gen yacc")
	}

	deps = append(deps, info.protoOrderOnlyDeps...)
	deps = append(deps, info.aidlOrderOnlyDeps...)
	deps = append(deps, info.syspropOrderOnlyDeps...)

	if len(rsFiles) > 0 {
	deps = append(deps, rsGenerateCpp(ctx, rsFiles, buildFlags.rsFlags)...)
	}

	return srcFiles, deps, info
	}