Add os/target configurable selects for label list attributes.
This CL is pretty large, so I recommend starting with reading the newly
added tests for the expected behavior.
This change works in conjunction with the linked CLs in the Gerrit topic.
Those CLs add support for new platform() definitions for OS targets
specified in Soong's arch.go, which are configurable through
Android.bp's `target {}` property. It works similary to previous CLs
adding support for the `arch {}` property.
These configurable props are keyed by the OS: android, linux_bionic,
windows, and so on. They map to `select` statements in label list
attributes, which this CL enables for cc_library_headers' header_libs
and export_header_lib_headers props.
This enables //bionic/libc:libc_headers to be generated correctly, from:
cc_library_headers {
name: "libc_headers",
target: {
android: {
header_libs: ["libc_headers_arch"],
export_header_lib_headers: ["libc_headers_arch"],
},
linux_bionic: {
header_libs: ["libc_headers_arch"],
export_header_lib_headers: ["libc_headers_arch"],
},
},
// omitted props
}
to:
cc_library_headers(
name = "libc_headers",
deps = [] + select({
"//build/bazel/platforms/os:android": [
":libc_headers_arch",
],
"//build/bazel/platforms/os:linux_bionic": [
":libc_headers_arch",
],
"//conditions:default": [],
}),
)
Test: TH
Test: Verify generated //bionic/libc:libc_headers
Fixes: 183597786
Change-Id: I01016cc2cc9a71449f02300d747f01decebf3f6e
diff --git a/cc/Android.bp b/cc/Android.bp
index 79e92cb..cc4d9bc 100644
--- a/cc/Android.bp
+++ b/cc/Android.bp
@@ -20,6 +20,7 @@
"androidmk.go",
"api_level.go",
"builder.go",
+ "bp2build.go",
"cc.go",
"ccdeps.go",
"check.go",
diff --git a/cc/bp2build.go b/cc/bp2build.go
new file mode 100644
index 0000000..2a590eb
--- /dev/null
+++ b/cc/bp2build.go
@@ -0,0 +1,106 @@
+// Copyright 2021 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 (
+ "android/soong/android"
+ "android/soong/bazel"
+)
+
+// bp2build functions and helpers for converting cc_* modules to Bazel.
+
+func init() {
+ android.DepsBp2BuildMutators(RegisterDepsBp2Build)
+}
+
+func RegisterDepsBp2Build(ctx android.RegisterMutatorsContext) {
+ ctx.BottomUp("cc_bp2build_deps", depsBp2BuildMutator)
+}
+
+// A naive deps mutator to add deps on all modules across all combinations of
+// target props for cc modules. This is needed to make module -> bazel label
+// resolution work in the bp2build mutator later. This is probably
+// the wrong way to do it, but it works.
+//
+// TODO(jingwen): can we create a custom os mutator in depsBp2BuildMutator to do this?
+func depsBp2BuildMutator(ctx android.BottomUpMutatorContext) {
+ module, ok := ctx.Module().(*Module)
+ if !ok {
+ // Not a cc module
+ return
+ }
+
+ if !module.ConvertWithBp2build(ctx) {
+ return
+ }
+
+ var allDeps []string
+
+ for _, p := range module.GetTargetProperties(&BaseLinkerProperties{}) {
+ // arch specific linker props
+ if baseLinkerProps, ok := p.(*BaseLinkerProperties); ok {
+ allDeps = append(allDeps, baseLinkerProps.Header_libs...)
+ allDeps = append(allDeps, baseLinkerProps.Export_header_lib_headers...)
+ }
+ }
+
+ ctx.AddDependency(module, nil, android.SortedUniqueStrings(allDeps)...)
+}
+
+// bp2BuildParseHeaderLibs creates a label list attribute containing the header library deps of a module, including
+// configurable attribute values.
+func bp2BuildParseHeaderLibs(ctx android.TopDownMutatorContext, module *Module) bazel.LabelListAttribute {
+ var ret bazel.LabelListAttribute
+ for _, linkerProps := range module.linker.linkerProps() {
+ if baseLinkerProps, ok := linkerProps.(*BaseLinkerProperties); ok {
+ libs := baseLinkerProps.Header_libs
+ libs = append(libs, baseLinkerProps.Export_header_lib_headers...)
+ ret = bazel.MakeLabelListAttribute(
+ android.BazelLabelForModuleDeps(ctx, android.SortedUniqueStrings(libs)))
+ break
+ }
+ }
+
+ for os, p := range module.GetTargetProperties(&BaseLinkerProperties{}) {
+ if baseLinkerProps, ok := p.(*BaseLinkerProperties); ok {
+ libs := baseLinkerProps.Header_libs
+ libs = append(libs, baseLinkerProps.Export_header_lib_headers...)
+ libs = android.SortedUniqueStrings(libs)
+ ret.SetValueForOS(os.Name, android.BazelLabelForModuleDeps(ctx, libs))
+ }
+ }
+
+ return ret
+}
+
+// bp2BuildParseExportedIncludes creates a label list attribute contains the
+// exported included directories of a module.
+func bp2BuildParseExportedIncludes(ctx android.TopDownMutatorContext, module *Module) (bazel.LabelListAttribute, bazel.LabelListAttribute) {
+ libraryDecorator := module.linker.(*libraryDecorator)
+
+ includeDirs := libraryDecorator.flagExporter.Properties.Export_system_include_dirs
+ includeDirs = append(includeDirs, libraryDecorator.flagExporter.Properties.Export_include_dirs...)
+
+ includeDirsLabels := android.BazelLabelForModuleSrc(ctx, includeDirs)
+
+ var includeDirGlobs []string
+ for _, includeDir := range includeDirs {
+ includeDirGlobs = append(includeDirGlobs, includeDir+"/**/*.h")
+ includeDirGlobs = append(includeDirGlobs, includeDir+"/**/*.inc")
+ includeDirGlobs = append(includeDirGlobs, includeDir+"/**/*.hpp")
+ }
+
+ headersLabels := android.BazelLabelForModuleSrc(ctx, includeDirGlobs)
+ return bazel.MakeLabelListAttribute(includeDirsLabels), bazel.MakeLabelListAttribute(headersLabels)
+}
diff --git a/cc/library.go b/cc/library.go
index 091acfe..50fff7f 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -2046,38 +2046,6 @@
return outputFile
}
-func Bp2BuildParseHeaderLibs(ctx android.TopDownMutatorContext, module *Module) bazel.LabelListAttribute {
- var headerLibs []string
- for _, linkerProps := range module.linker.linkerProps() {
- if baseLinkerProps, ok := linkerProps.(*BaseLinkerProperties); ok {
- headerLibs = baseLinkerProps.Header_libs
- // FIXME: re-export include dirs from baseLinkerProps.Export_header_lib_headers?
- break
- }
- }
- headerLibsLabels := bazel.MakeLabelListAttribute(android.BazelLabelForModuleDeps(ctx, headerLibs))
- return headerLibsLabels
-}
-
-func Bp2BuildParseExportedIncludes(ctx android.TopDownMutatorContext, module *Module) (bazel.LabelListAttribute, bazel.LabelListAttribute) {
- libraryDecorator := module.linker.(*libraryDecorator)
-
- includeDirs := libraryDecorator.flagExporter.Properties.Export_system_include_dirs
- includeDirs = append(includeDirs, libraryDecorator.flagExporter.Properties.Export_include_dirs...)
-
- includeDirsLabels := android.BazelLabelForModuleSrc(ctx, includeDirs)
-
- var includeDirGlobs []string
- for _, includeDir := range includeDirs {
- includeDirGlobs = append(includeDirGlobs, includeDir+"/**/*.h")
- includeDirGlobs = append(includeDirGlobs, includeDir+"/**/*.inc")
- includeDirGlobs = append(includeDirGlobs, includeDir+"/**/*.hpp")
- }
-
- headersLabels := android.BazelLabelForModuleSrc(ctx, includeDirGlobs)
- return bazel.MakeLabelListAttribute(includeDirsLabels), bazel.MakeLabelListAttribute(headersLabels)
-}
-
type bazelCcLibraryStaticAttributes struct {
Copts []string
Srcs bazel.LabelListAttribute
@@ -2149,10 +2117,10 @@
allIncludes = append(allIncludes, localIncludeDirs...)
includesLabels := android.BazelLabelForModuleSrc(ctx, allIncludes)
- exportedIncludesLabels, exportedIncludesHeadersLabels := Bp2BuildParseExportedIncludes(ctx, module)
+ exportedIncludesLabels, exportedIncludesHeadersLabels := bp2BuildParseExportedIncludes(ctx, module)
includesLabels.Append(exportedIncludesLabels.Value)
- headerLibsLabels := Bp2BuildParseHeaderLibs(ctx, module)
+ headerLibsLabels := bp2BuildParseHeaderLibs(ctx, module)
depsLabels.Append(headerLibsLabels.Value)
attrs := &bazelCcLibraryStaticAttributes{
diff --git a/cc/library_headers.go b/cc/library_headers.go
index 8286848..c8dd2c2 100644
--- a/cc/library_headers.go
+++ b/cc/library_headers.go
@@ -94,9 +94,9 @@
return
}
- exportedIncludesLabels, exportedIncludesHeadersLabels := Bp2BuildParseExportedIncludes(ctx, module)
+ exportedIncludesLabels, exportedIncludesHeadersLabels := bp2BuildParseExportedIncludes(ctx, module)
- headerLibsLabels := Bp2BuildParseHeaderLibs(ctx, module)
+ headerLibsLabels := bp2BuildParseHeaderLibs(ctx, module)
attrs := &bazelCcLibraryHeadersAttributes{
Includes: exportedIncludesLabels,