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// 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
// This file generates the final rules for compiling all C/C++. All properties related to
// compiling should have been translated into builderFlags or another argument to the Transform*
// functions.
import (
"path/filepath"
"strings"
"github.com/google/blueprint"
"github.com/google/blueprint/pathtools"
"android/soong/common"
)
func init() {
pctx.StaticVariable("lexCmd", "${SrcDir}/prebuilts/misc/${HostPrebuiltTag}/flex/flex-2.5.39")
pctx.StaticVariable("yaccCmd", "${SrcDir}/prebuilts/misc/${HostPrebuiltTag}/bison/bison")
pctx.StaticVariable("yaccDataDir", "${SrcDir}/external/bison/data")
}
var (
yacc = pctx.StaticRule("yacc",
blueprint.RuleParams{
Command: "BISON_PKGDATADIR=$yaccDataDir $yaccCmd -d $yaccFlags -o $cppFile $in && " +
"cp -f $hppFile $hFile",
Description: "yacc $out",
},
"yaccFlags", "cppFile", "hppFile", "hFile")
lex = pctx.StaticRule("lex",
blueprint.RuleParams{
Command: "$lexCmd -o$out $in",
Description: "lex $out",
})
)
func genYacc(ctx common.AndroidModuleContext, yaccFile, yaccFlags string) (cppFile, headerFile string) {
cppFile = strings.TrimPrefix(yaccFile, common.ModuleSrcDir(ctx))
cppFile = filepath.Join(common.ModuleGenDir(ctx), cppFile)
cppFile = pathtools.ReplaceExtension(cppFile, "cpp")
hppFile := pathtools.ReplaceExtension(cppFile, "hpp")
headerFile = pathtools.ReplaceExtension(cppFile, "h")
ctx.Build(pctx, blueprint.BuildParams{
Rule: yacc,
Outputs: []string{cppFile, headerFile},
Inputs: []string{yaccFile},
Implicits: []string{"$yaccCmd"},
Args: map[string]string{
"yaccFlags": yaccFlags,
"cppFile": cppFile,
"hppFile": hppFile,
"hFile": headerFile,
},
})
return cppFile, headerFile
}
func genLex(ctx common.AndroidModuleContext, lexFile string) (cppFile string) {
cppFile = strings.TrimPrefix(lexFile, common.ModuleSrcDir(ctx))
cppFile = filepath.Join(common.ModuleGenDir(ctx), cppFile)
cppFile = pathtools.ReplaceExtension(cppFile, "cpp")
ctx.Build(pctx, blueprint.BuildParams{
Rule: lex,
Outputs: []string{cppFile},
Inputs: []string{lexFile},
Implicits: []string{"$lexCmd"},
})
return cppFile
}
func genSources(ctx common.AndroidModuleContext, srcFiles []string,
buildFlags builderFlags) ([]string, []string) {
var deps []string
for i, srcFile := range srcFiles {
switch filepath.Ext(srcFile) {
case ".y", ".yy":
cppFile, headerFile := genYacc(ctx, srcFile, buildFlags.yaccFlags)
srcFiles[i] = cppFile
deps = append(deps, headerFile)
case ".l", ".ll":
cppFile := genLex(ctx, srcFile)
srcFiles[i] = cppFile
}
}
return srcFiles, deps
}
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