bp2build: cc_object converter.
This CL introduces a basic bp2build converter for cc_object modules.
cc_objects maps cleanly to cc_library targets, but with -fnoaddrsig.
This CL also demonstrates generating include deps within a macro to
allow the cc_object compilation to depend on a relative-include header
within an include dir.
e.g. if "foo.cc" includes "android/log.h" and the latter is located at
"include/android/log.h", the autogenerated header deps would export
"android/log.h" correctly to the foo.cc upstream target.
Test: GENERATE_BAZEL_FILES=true m nothing && bp2build-sync write && bazel build //bionic/libc:crtbegin_so1
Change-Id: Ifd9e097051ec184ab0a1929d07918f0ff4f24d98
diff --git a/cc/object.go b/cc/object.go
index 3ce7676..d92e110 100644
--- a/cc/object.go
+++ b/cc/object.go
@@ -18,6 +18,7 @@
"fmt"
"android/soong/android"
+ "android/soong/bazel"
)
//
@@ -27,6 +28,8 @@
func init() {
android.RegisterModuleType("cc_object", ObjectFactory)
android.RegisterSdkMemberType(ccObjectSdkMemberType)
+
+ android.RegisterBp2BuildMutator("cc_object", ObjectBp2Build)
}
var ccObjectSdkMemberType = &librarySdkMemberType{
@@ -82,9 +85,80 @@
module.compiler.appendCflags([]string{"-fno-addrsig"})
module.sdkMemberTypes = []android.SdkMemberType{ccObjectSdkMemberType}
+
return module.Init()
}
+// For bp2build conversion.
+type bazelObjectAttributes struct {
+ Srcs bazel.LabelList
+ Copts []string
+ Local_include_dirs []string
+}
+
+type bazelObject struct {
+ android.BazelTargetModuleBase
+ bazelObjectAttributes
+}
+
+func (m *bazelObject) Name() string {
+ return m.BaseModuleName()
+}
+
+func (m *bazelObject) GenerateAndroidBuildActions(ctx android.ModuleContext) {}
+
+func BazelObjectFactory() android.Module {
+ module := &bazelObject{}
+ module.AddProperties(&module.bazelObjectAttributes)
+ android.InitBazelTargetModule(module)
+ return module
+}
+
+// ObjectBp2Build is the bp2build converter from cc_object modules to the
+// Bazel equivalent target, plus any necessary include deps for the cc_object.
+func ObjectBp2Build(ctx android.TopDownMutatorContext) {
+ m, ok := ctx.Module().(*Module)
+ if !ok || !m.Properties.Bazel_module.Bp2build_available {
+ return
+ }
+
+ // a Module can be something other than a cc_object.
+ if ctx.ModuleType() != "cc_object" {
+ return
+ }
+
+ if m.compiler == nil {
+ // a cc_object must have access to the compiler decorator for its props.
+ ctx.ModuleErrorf("compiler must not be nil for a cc_object module")
+ }
+
+ var copts []string
+ var srcs []string
+ var localIncludeDirs []string
+ for _, props := range m.compiler.compilerProps() {
+ if baseCompilerProps, ok := props.(*BaseCompilerProperties); ok {
+ copts = baseCompilerProps.Cflags
+ srcs = baseCompilerProps.Srcs
+ localIncludeDirs = baseCompilerProps.Local_include_dirs
+ break
+ }
+ }
+
+ attrs := &bazelObjectAttributes{
+ Srcs: android.BazelLabelForModuleSrc(ctx, srcs),
+ Copts: copts,
+ Local_include_dirs: localIncludeDirs,
+ }
+
+ props := bazel.NewBazelTargetModuleProperties(
+ m.Name(),
+ "cc_object",
+ "//build/bazel/rules:cc_object.bzl",
+ )
+
+ ctx.CreateBazelTargetModule(BazelObjectFactory, props, attrs)
+}
+
func (object *objectLinker) appendLdflags(flags []string) {
panic(fmt.Errorf("appendLdflags on objectLinker not supported"))
}