Add Rust support to Soong.
Adds support to Soong for building rust modules. This currently only
supports x86_64 device and x86 linux host targets. The functionality
is sufficient to build crosvm.
Bug: 136189233
Test: Test module builds.
Test: crosvm builds.
Change-Id: I6ea04615834a6d673578ab10ea1a2eb04259fe09
diff --git a/rust/androidmk.go b/rust/androidmk.go
new file mode 100644
index 0000000..c9056e1
--- /dev/null
+++ b/rust/androidmk.go
@@ -0,0 +1,155 @@
+// Copyright 2019 The Android Open Source Project
+//
+// 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 rust
+
+import (
+ "fmt"
+ "io"
+ "path/filepath"
+ "regexp"
+ "strings"
+
+ "android/soong/android"
+)
+
+type AndroidMkContext interface {
+ Name() string
+ Target() android.Target
+ subAndroidMk(*android.AndroidMkData, interface{})
+}
+
+type subAndroidMkProvider interface {
+ AndroidMk(AndroidMkContext, *android.AndroidMkData)
+}
+
+func (mod *Module) subAndroidMk(data *android.AndroidMkData, obj interface{}) {
+ if mod.subAndroidMkOnce == nil {
+ mod.subAndroidMkOnce = make(map[subAndroidMkProvider]bool)
+ }
+ if androidmk, ok := obj.(subAndroidMkProvider); ok {
+ if !mod.subAndroidMkOnce[androidmk] {
+ mod.subAndroidMkOnce[androidmk] = true
+ androidmk.AndroidMk(mod, data)
+ }
+ }
+}
+
+func (mod *Module) AndroidMk() android.AndroidMkData {
+ ret := android.AndroidMkData{
+ OutputFile: mod.outputFile,
+ Include: "$(BUILD_SYSTEM)/soong_rust_prebuilt.mk",
+ Extra: []android.AndroidMkExtraFunc{
+ func(w io.Writer, outputFile android.Path) {
+ if len(mod.Properties.AndroidMkRlibs) > 0 {
+ fmt.Fprintln(w, "LOCAL_RLIB_LIBRARIES := "+strings.Join(mod.Properties.AndroidMkRlibs, " "))
+ }
+ if len(mod.Properties.AndroidMkDylibs) > 0 {
+ fmt.Fprintln(w, "LOCAL_DYLIB_LIBRARIES := "+strings.Join(mod.Properties.AndroidMkDylibs, " "))
+ }
+ if len(mod.Properties.AndroidMkProcMacroLibs) > 0 {
+ fmt.Fprintln(w, "LOCAL_PROC_MACRO_LIBRARIES := "+strings.Join(mod.Properties.AndroidMkProcMacroLibs, " "))
+ }
+ if len(mod.Properties.AndroidMkSharedLibs) > 0 {
+ fmt.Fprintln(w, "LOCAL_SHARED_LIBRARIES := "+strings.Join(mod.Properties.AndroidMkSharedLibs, " "))
+ }
+ if len(mod.Properties.AndroidMkStaticLibs) > 0 {
+ fmt.Fprintln(w, "LOCAL_STATIC_LIBRARIES := "+strings.Join(mod.Properties.AndroidMkStaticLibs, " "))
+ }
+ },
+ },
+ }
+
+ mod.subAndroidMk(&ret, mod.compiler)
+
+ return ret
+}
+
+func (binary *binaryDecorator) AndroidMk(ctx AndroidMkContext, ret *android.AndroidMkData) {
+ ctx.subAndroidMk(ret, binary.baseCompiler)
+
+ ret.Class = "EXECUTABLES"
+ ret.DistFile = binary.distFile
+ ret.Extra = append(ret.Extra, func(w io.Writer, outputFile android.Path) {
+ fmt.Fprintln(w, "LOCAL_SOONG_UNSTRIPPED_BINARY :=", binary.unstrippedOutputFile.String())
+ })
+}
+
+func (library *libraryDecorator) AndroidMk(ctx AndroidMkContext, ret *android.AndroidMkData) {
+ ctx.subAndroidMk(ret, library.baseCompiler)
+
+ if library.rlib() {
+ ret.Class = "RLIB_LIBRARIES"
+ } else if library.dylib() {
+ ret.Class = "DYLIB_LIBRARIES"
+ }
+ ret.DistFile = library.distFile
+ ret.Extra = append(ret.Extra, func(w io.Writer, outputFile android.Path) {
+ if !library.rlib() {
+ fmt.Fprintln(w, "LOCAL_SOONG_UNSTRIPPED_BINARY :=", library.unstrippedOutputFile.String())
+ }
+ })
+}
+
+func (procMacro *procMacroDecorator) AndroidMk(ctx AndroidMkContext, ret *android.AndroidMkData) {
+ ctx.subAndroidMk(ret, procMacro.baseCompiler)
+
+ ret.Class = "PROC_MACRO_LIBRARIES"
+ ret.DistFile = procMacro.distFile
+
+}
+
+func (compiler *baseCompiler) AndroidMk(ctx AndroidMkContext, ret *android.AndroidMkData) {
+ // Soong installation is only supported for host modules. Have Make
+ // installation trigger Soong installation.
+ if ctx.Target().Os.Class == android.Host {
+ ret.OutputFile = android.OptionalPathForPath(compiler.path)
+ }
+ ret.Extra = append(ret.Extra, func(w io.Writer, outputFile android.Path) {
+ path := compiler.path.RelPathString()
+ dir, file := filepath.Split(path)
+ stem, suffix, _ := splitFileExt(file)
+ fmt.Fprintln(w, "LOCAL_MODULE_SUFFIX := "+suffix)
+ fmt.Fprintln(w, "LOCAL_MODULE_PATH := $(OUT_DIR)/"+filepath.Clean(dir))
+ fmt.Fprintln(w, "LOCAL_MODULE_STEM := "+stem)
+ })
+}
+
+//TODO: splitFileExt copied from cc/util.go; move this to android/util.go and refactor usages.
+
+// splitFileExt splits a file name into root, suffix and ext. root stands for the file name without
+// the file extension and the version number (e.g. "libexample"). suffix stands for the
+// concatenation of the file extension and the version number (e.g. ".so.1.0"). ext stands for the
+// file extension after the version numbers are trimmed (e.g. ".so").
+var shlibVersionPattern = regexp.MustCompile("(?:\\.\\d+(?:svn)?)+")
+
+func splitFileExt(name string) (string, string, string) {
+ // Extract and trim the shared lib version number if the file name ends with dot digits.
+ suffix := ""
+ matches := shlibVersionPattern.FindAllStringIndex(name, -1)
+ if len(matches) > 0 {
+ lastMatch := matches[len(matches)-1]
+ if lastMatch[1] == len(name) {
+ suffix = name[lastMatch[0]:lastMatch[1]]
+ name = name[0:lastMatch[0]]
+ }
+ }
+
+ // Extract the file name root and the file extension.
+ ext := filepath.Ext(name)
+ root := strings.TrimSuffix(name, ext)
+ suffix = ext + suffix
+
+ return root, suffix, ext
+}