Revert "Revert "Switch NDK libc++ from prebuilts/ndk to prebuilt..."

Revert submission 3198506-revert-3195358-ndk-libcxx-UOZAIZERUU

Reason for revert: reland topic

Reverted changes: /q/submissionid:3198506-revert-3195358-ndk-libcxx-UOZAIZERUU

Bug: http://b/332594828
Test: treehugger
Change-Id: I36c9f825cccd02fdd5fc1cd67e5123fc9f84f6b1

core/binary.mk

@@ -205,8 +205,6 @@ ifneq ($(LOCAL_SDK_VERSION),)
     my_api_level := $(my_ndk_api)
   endif
 
-  my_ndk_source_root := \
-      $(HISTORICAL_NDK_VERSIONS_ROOT)/$(LOCAL_NDK_VERSION)/sources
   my_built_ndk := $(SOONG_OUT_DIR)/ndk
   my_ndk_triple := $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_NDK_TRIPLE)
   my_ndk_sysroot_include := \
@@ -239,16 +237,18 @@ ifneq ($(LOCAL_SDK_VERSION),)
   endif
 
   ifeq (system,$(LOCAL_NDK_STL_VARIANT))
+    my_ndk_source_root := \
+        $(HISTORICAL_NDK_VERSIONS_ROOT)/$(LOCAL_NDK_VERSION)/sources
     my_ndk_stl_include_path := $(my_ndk_source_root)/cxx-stl/system/include
     my_system_shared_libraries += libstdc++
   else ifneq (,$(filter c++_%, $(LOCAL_NDK_STL_VARIANT)))
-    my_ndk_stl_include_path := \
+    my_llvm_dir := $(LLVM_PREBUILTS_BASE)/$(BUILD_OS)-x86/$(LLVM_PREBUILTS_VERSION)
-      $(my_ndk_source_root)/cxx-stl/llvm-libc++/include
+    my_libcxx_arch_dir := $(my_llvm_dir)/android_libc++/ndk/$($(LOCAL_2ND_ARCH_VAR_PREFIX)PREBUILT_LIBCXX_ARCH_DIR)
-    my_ndk_stl_include_path += \
-      $(my_ndk_source_root)/cxx-stl/llvm-libc++abi/include
 
-    my_libcxx_libdir := \
+    # Include the target-specific __config_site file followed by the generic libc++ headers.
-      $(my_ndk_source_root)/cxx-stl/llvm-libc++/libs/$(my_cpu_variant)
+    my_ndk_stl_include_path := $(my_libcxx_arch_dir)/include/c++/v1
+    my_ndk_stl_include_path += $(my_llvm_dir)/include/c++/v1
+    my_libcxx_libdir := $(my_libcxx_arch_dir)/lib
 
     ifeq (c++_static,$(LOCAL_NDK_STL_VARIANT))
       my_ndk_stl_static_lib := \
@@ -258,7 +258,7 @@ ifneq ($(LOCAL_SDK_VERSION),)
       my_ndk_stl_shared_lib_fullpath := $(my_libcxx_libdir)/libc++_shared.so
     endif
 
-    my_ndk_stl_static_lib += $(my_libcxx_libdir)/libunwind.a
+    my_ndk_stl_static_lib += $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_LIBUNWIND)
     my_ldlibs += -ldl
   else # LOCAL_NDK_STL_VARIANT must be none
     # Do nothing.

core/clang/TARGET_arm.mk

@@ -4,7 +4,10 @@ $(clang_2nd_arch_prefix)RS_COMPAT_TRIPLE := armv7-none-linux-gnueabi
 
 $(clang_2nd_arch_prefix)TARGET_LIBPROFILE_RT := $(LLVM_RTLIB_PATH)/libclang_rt.profile-arm-android.a
 $(clang_2nd_arch_prefix)TARGET_LIBCRT_BUILTINS := $(LLVM_RTLIB_PATH)/libclang_rt.builtins-arm-android.a
+$(clang_2nd_arch_prefix)TARGET_LIBUNWIND := $(LLVM_RTLIB_PATH)/arm/libunwind.a
 
 # Address sanitizer clang config
 $(clang_2nd_arch_prefix)ADDRESS_SANITIZER_LINKER := /system/bin/linker_asan
 $(clang_2nd_arch_prefix)ADDRESS_SANITIZER_LINKER_FILE := /system/bin/bootstrap/linker_asan
+
+$(clang_2nd_arch_prefix)PREBUILT_LIBCXX_ARCH_DIR := arm

core/clang/TARGET_arm64.mk

@@ -4,7 +4,10 @@ RS_COMPAT_TRIPLE := aarch64-linux-android
 
 TARGET_LIBPROFILE_RT := $(LLVM_RTLIB_PATH)/libclang_rt.profile-aarch64-android.a
 TARGET_LIBCRT_BUILTINS := $(LLVM_RTLIB_PATH)/libclang_rt.builtins-aarch64-android.a
+TARGET_LIBUNWIND := $(LLVM_RTLIB_PATH)/aarch64/libunwind.a
 
 # Address sanitizer clang config
 ADDRESS_SANITIZER_LINKER := /system/bin/linker_asan64
 ADDRESS_SANITIZER_LINKER_FILE := /system/bin/bootstrap/linker_asan64
+
+PREBUILT_LIBCXX_ARCH_DIR := aarch64

core/clang/TARGET_riscv64.mk

@@ -4,7 +4,10 @@ RS_COMPAT_TRIPLE := riscv64-linux-android
 
 TARGET_LIBPROFILE_RT := $(LLVM_RTLIB_PATH)/libclang_rt.profile-riscv64-android.a
 TARGET_LIBCRT_BUILTINS := $(LLVM_RTLIB_PATH)/libclang_rt.builtins-riscv64-android.a
+TARGET_LIBUNWIND := $(LLVM_RTLIB_PATH)/riscv64/libunwind.a
 
 # Address sanitizer clang config
 ADDRESS_SANITIZER_LINKER := /system/bin/linker_asan64
 ADDRESS_SANITIZER_LINKER_FILE := /system/bin/bootstrap/linker_asan64
+
+PREBUILT_LIBCXX_ARCH_DIR := riscv64

core/clang/TARGET_x86.mk

@@ -4,7 +4,10 @@ $(clang_2nd_arch_prefix)RS_COMPAT_TRIPLE := i686-linux-android
 
 $(clang_2nd_arch_prefix)TARGET_LIBPROFILE_RT := $(LLVM_RTLIB_PATH)/libclang_rt.profile-i686-android.a
 $(clang_2nd_arch_prefix)TARGET_LIBCRT_BUILTINS := $(LLVM_RTLIB_PATH)/libclang_rt.builtins-i686-android.a
+$(clang_2nd_arch_prefix)TARGET_LIBUNWIND := $(LLVM_RTLIB_PATH)/i386/libunwind.a
 
 # Address sanitizer clang config
 $(clang_2nd_arch_prefix)ADDRESS_SANITIZER_LINKER := /system/bin/linker_asan
 $(clang_2nd_arch_prefix)ADDRESS_SANITIZER_LINKER_FILE := /system/bin/bootstrap/linker_asan
+
+$(clang_2nd_arch_prefix)PREBUILT_LIBCXX_ARCH_DIR := i386

core/clang/TARGET_x86_64.mk

@@ -4,7 +4,10 @@ RS_COMPAT_TRIPLE := x86_64-linux-android
 
 TARGET_LIBPROFILE_RT := $(LLVM_RTLIB_PATH)/libclang_rt.profile-x86_64-android.a
 TARGET_LIBCRT_BUILTINS := $(LLVM_RTLIB_PATH)/libclang_rt.builtins-x86_64-android.a
+TARGET_LIBUNWIND := $(LLVM_RTLIB_PATH)/x86_64/libunwind.a
 
 # Address sanitizer clang config
 ADDRESS_SANITIZER_LINKER := /system/bin/linker_asan64
 ADDRESS_SANITIZER_LINKER_FILE := /system/bin/bootstrap/linker_asan64
+
+PREBUILT_LIBCXX_ARCH_DIR := x86_64

core/install_jni_libs_internal.mk

@@ -38,8 +38,9 @@ ifdef my_embed_jni
       $(error LOCAL_SDK_VERSION must be defined with LOCAL_NDK_STL_VARIANT, \
           LOCAL_PACKAGE_NAME=$(LOCAL_PACKAGE_NAME))
     endif
+    my_libcxx_arch := $($(LOCAL_2ND_ARCH_VAR_PREFIX)PREBUILT_LIBCXX_ARCH_DIR)
     my_jni_shared_libraries += \
-        $(HISTORICAL_NDK_VERSIONS_ROOT)/$(LOCAL_NDK_VERSION)/sources/cxx-stl/llvm-libc++/libs/$(TARGET_$(my_2nd_arch_prefix)CPU_ABI)/libc++_shared.so
+        $(LLVM_PREBUILTS_BASE)/$(BUILD_OS)-x86/$(LLVM_PREBUILTS_VERSION)/android_libc++/ndk/$(my_libcxx_arch)/lib/libc++_shared.so
   endif
 
   # Set the abi directory used by the local JNI shared libraries.