关于C ++：在Android Embedded中构建v8时出错

Error while building v8 in android embedded

我试图将v8 7.6.90导入为我的Android NDK项目中的静态库，但是在链接过程中失败。

这是v8构建的args.gn配置：

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android_unstripped_runtime_outputs = true
v8_use_external_startup_data = false
is_debug = false
symbol_level = 1
target_cpu ="arm"
target_os ="android"
use_goma = false
v8_enable_i18n_support = false
v8_static_library = true
is_component_build = false
v8_monolithic = true
v8_android_log_stdout = true

它确实编译了，编译后给了我libv8_monolith.a，然后我开始设置我的Android项目。

CMakeLists.txt：

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cmake_minimum_required(VERSION 3.4.1)
add_library(v8 STATIC IMPORTED)
set_target_properties( v8 PROPERTIES IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libv8_monolith.a)
add_library( # Sets the name of the library.
native-lib

# Sets the library as a shared library.
SHARED

# Provides a relative path to your source file(s).
${CMAKE_SOURCE_DIR}/src/main/cpp/native-lib.cpp)

target_include_directories( native-lib PRIVATE ${CMAKE_SOURCE_DIR}/libs/include)

find_library( # Sets the name of the path variable.
log-lib

# Specifies the name of the NDK library that
# you want CMake to locate.
log)

target_link_libraries( # Specifies the target library.
native-lib
v8
# Links the target library to the log library
# included in the NDK.
${log-lib})

build.gradle：

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externalNativeBuild {
cmake {
cppFlags"-std=c++0x"
}
}
ndk {
abiFilters"armeabi-v7a"
}

native-lib.cpp在https://chromium.googlesource.com/v8/v8/+/master/samples/hello-world.cc中运行相同的示例

但是ld总是抱怨该错误：

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../../src/compiler/graph-visualizer.cc:0: error: undefined reference to 'vtable for std::__1::basic_ios<char, std::__1::char_traits<char> >'
/Users/fredguo/Library/Android/sdk/ndk-bundle/toolchains/llvm/prebuilt/darwin-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: the vtable symbol may be undefined because the class is missing its key function
error: undefined reference to 'v8::platform::NewDefaultPlatform(int, v8::platform::IdleTaskSupport, v8::platform::InProcessStackDumping, std::__ndk1::unique_ptr<v8::TracingController, std::__ndk1::default_delete<v8::TracingController> >)'

我试图objdump我的libv8_monolith.a：

objdump -D app/libs/armeabi-v7a/libv8_monolith.a | grep NewDefault

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Disassembly of section .text._ZN2v88platform18NewDefaultPlatformEiNS0_15IdleTaskSupportENS0_21InProcessStackDumpingENSt3__110unique_ptrINS_17TracingControllerENS3_14default_deleteIS5_EEEE:
_ZN2v88platform18NewDefaultPlatformEiNS0_15IdleTaskSupportENS0_21InProcessStackDumpingENSt3__110unique_ptrINS_17TracingControllerENS3_14default_deleteIS5_EEEE:
4: 81 b0 01 2b blhs #442884 <_ZN2v88platform18NewDefaultPlatformEiNS0_15IdleTaskSupportENS0_21InProcessStackDumpingENSt3__110unique_ptrINS_17TracingControllerENS3_14default_deleteIS5_EEEE+0x6C210>
Disassembly of section .rel.text._ZN2v88platform18NewDefaultPlatformEiNS0_15IdleTaskSupportENS0_21InProcessStackDumpingENSt3__110unique_ptrINS_17TracingControllerENS3_14default_deleteIS5_EEEE:
.rel.text._ZN2v88platform18NewDefaultPlatformEiNS0_15IdleTaskSupportENS0_21InProcessStackDumpingENSt3__110unique_ptrINS_17TracingControllerENS3_14default_deleteIS5_EEEE:
Disassembly of section .ARM.exidx.text._ZN2v88platform18NewDefaultPlatformEiNS0_15IdleTaskSupportENS0_21InProcessStackDumpingENSt3__110unique_ptrINS_17TracingControllerENS3_14default_deleteIS5_EEEE:
.ARM.exidx.text._ZN2v88platform18NewDefaultPlatformEiNS0_15IdleTaskSupportENS0_21InProcessStackDumpingENSt3__110unique_ptrINS_17TracingControllerENS3_14default_deleteIS5_EEEE:
Disassembly of section .rel.ARM.exidx.text._ZN2v88platform18NewDefaultPlatformEiNS0_15IdleTaskSupportENS0_21InProcessStackDumpingENSt3__110unique_ptrINS_17TracingControllerENS3_14default_deleteIS5_EEEE:
.rel.ARM.exidx.text._ZN2v88platform18NewDefaultPlatformEiNS0_15IdleTaskSupportENS0_21InProcessStackDumpingENSt3__110unique_ptrINS_17TracingControllerENS3_14default_deleteIS5_EEEE:
Disassembly of section .text._ZN2v811ArrayBuffer9Allocator19NewDefaultAllocatorEv:
_ZN2v811ArrayBuffer9Allocator19NewDefaultAllocatorEv:
Disassembly of section .rel.text._ZN2v811ArrayBuffer9Allocator19NewDefaultAllocatorEv:
.rel.text._ZN2v811ArrayBuffer9Allocator19NewDefaultAllocatorEv:
Disassembly of section .ARM.exidx.text._ZN2v811ArrayBuffer9Allocator19NewDefaultAllocatorEv:
.ARM.exidx.text._ZN2v811ArrayBuffer9Allocator19NewDefaultAllocatorEv:
Disassembly of section .rel.ARM.exidx.text._ZN2v811ArrayBuffer9Allocator19NewDefaultAllocatorEv:
.rel.ARM.exidx.text._ZN2v811ArrayBuffer9Allocator19NewDefaultAllocatorEv:

_ZN2v88platform18NewDefaultPlatformEiNS0_15IdleTaskSupportENS0_21InProcessStackDumpingENSt3__110unique_ptrINS_17TracingControllerENS3_14default_deleteIS5_EEEE

应该

v8::platform::NewDefaultPlatform(int, v8::platform::IdleTaskSupport, v8::platform::InProcessStackDumping, std::__1::unique_ptr >)

但是，在错误消息中，ld尝试找到std::__ndk1::unique_ptr >)

我认为它们具有不同的名称空间，但是如何解决此问题？我在这里https://groups.google.com/forum/#!topic/v8-users/Jb1VSouy2Z0找到了类似的问题，但是该解决方案对我不起作用。