In the Android.mk of the android compilation system, there are still conditional judgments, but after Android.bp, android.bp is a plain text form similar to JSON. For the conditional judgment part in Android.mk, use go in Android.bp Language files to control.
Add Demo for conditional judgment macro switch
Macro switches added in Android.mk:
ifeq ($(ENABLE_USER2ENG),true)
LOCAL_CFLAGS += -DALLOW_ADBD_DISABLE_VERITY=1
LOCAL_CFLAGS += -DENABLE_USER2ENG=1
endif
If you want to add the above macro switch to Android.bp, you need to write a new file in go language:
For example, my modification is in system/core/fs_mgr/Android.bp, so I need to add system/core/fs_mgr/fs_mgr.go:
package fs_mgr
import (
"android/soong/android"
"android/soong/cc"
"fmt"
)
func init() {
// for DEBUG
fmt.Println("init start")
android.RegisterModuleType("AAA", fs_mgrDefaultsFactory)
}
func fs_mgrDefaultsFactory() (android.Module) {
module := cc.DefaultsFactory()
android.AddLoadHook(module, fs_mgrDefaults)
return module
}
func fs_mgrDefaults(ctx android.LoadHookContext) {
type props struct {
Cflags []string
}
p := &props{
}
p.Cflags = globalDefaults(ctx)
ctx.AppendProperties(p)
}
func globalDefaults(ctx android.BaseContext) ([]string) {
var cppflags []string
fmt.Println("ENABLE_USER2ENG:",
ctx.AConfig().IsEnvTrue("ENABLE_USER2ENG"))
if ctx.AConfig().IsEnvTrue("ENABLE_USER2ENG") {
cppflags = append(cppflags,
"-DALLOW_ADBD_DISABLE_VERITY=1",
"-DENABLE_USER2ENG=1")
}
return cppflags
}
Android.bpNeed to modify:
/// add start
bootstrap_go_package {
// name and pkgPath need to according to your module
name: "soong-fs_mgr",
pkgPath: "android/soong/fs_mgr",
deps: [
"blueprint",
"blueprint-pathtools",
"soong",
"soong-android",
"soong-cc",
"soong-genrule",
],
srcs: [
// include new add .go file
"fs_mgr.go",
],
pluginFor: ["soong_build"],
}
// AAA is a module
AAA {
name: "BBB",
}
/// add end
cc_defaults {
name: "fs_mgr_defaults",
defaults: ["BBB"],// new add
sanitize: {
misc_undefined: ["integer"],
},
local_include_dirs: ["include/"],
cppflags: ["-Werror", "-DMTK_FSTAB_FLAGS"],
}
When modifying with reference to this example, pay attention AAAto BBBthe corresponding relationship.
refers:
https://blog.csdn.net/weixin_33807284/article/details/86032658