c++11 - 无法使用适用于Android的CMake GUI启用C++ 11的情况下编译ChaiScript

Question

我无法为Android构建ChaiScript库。
最初，我尝试使用CMake GUI为linuxMint构建ChaiScript，如下所述

Source Path + binary Path -> Configure -> Specify Generator -> Generate -> Make.       

一切正常。所以我尝试按照以下提到的步骤为Android构建它

Source Path + binary Path -> Configure -> Specify Generator
1. Select specify tool-chain for cross compiling
2. (android.toolchain.cmake)
3. Path environment variable modified to have android-ndk path(added to .profile)
-> Generate -> Make.

现在它给出错误为“错误:'to_string'不是'std'的成员”和“错误:'stoll'不是'std'的成员”

最初，我使用POC在eclipse + Android + NDK中使用此std::to_string和std::stoll并将其设置为 "compile, build & run"。但是在CMake GUI中，我不知道如何输入以下标志

APP_STL:= c++ _ static

TARGET_PLATFORM:= android-21

TARGET_ARCH_ABI:= armeabi-v7a

我尝试通过“添加条目”和“字符串”作为类型。但是没有运气。错误仍然存​​在。任何解决方案/建议表示赞赏。

Answer 1

我本人为此问题发布了该解决方案。 (当我使用eclipse + jni而不是CMake GUI编译代码时，它不能很好地解决所提出的问题。但这可能会对某人有所帮助。)

该源代码已成功编译，使用Eclipse IDE + Android Project + JNI方法(Android NDK + Android.mk + Application.mk)构建。通过引用一些stackoverflow QA，下面给出了Android.mk和Application.mk脚本。在脚本内部的注释中，给出了使用标志的原因。这些注释对于理解脚本很有用。

Android.mk

LOCAL_PATH := $(call my-dir)
#Build Script to build ChaiScript library
include $(CLEAR_VARS)
#Used the below flag for (error: undefined reference to '__atomic_fetch_add_4')
LOCAL_LDLIBS += -latomic
# Here we give our module name and source file(s)
LOCAL_MODULE    := chaiscript
#ChaiScript header files
LOCAL_C_INCLUDES := $(LOCAL_PATH)/include_CS
#ChaiScript source files
LOCAL_SRC_FILES := src_CS/chaiscript_stdlib.cpp src_CS/main.cpp src_CS/stl_extra.cpp src_CS/test_module.cpp
#CPP files in the extension
LOCAL_CPP_EXTENSION := .cxx .cpp .cc .hpp
include $(BUILD_SHARED_LIBRARY)

#Build Script to build library caller code    
#LOCAL_PATH := $(call my-dir) #won't get cleared by clear_vars
include $(CLEAR_VARS) #clearing the variables defined for chaiscript build
LOCAL_MODULE := test_chaiscript
LOCAL_SRC_FILES := libchaiscript.so #can be 'chaiscript' alone
#ChaiScript Library headerfiles
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include_CS
#Caller code header files
LOCAL_C_INCLUDES := $(LOCAL_PATH)/header_own
#Caller code source files
LOCAL_SRC_FILES := src_own/NativeFunction.cpp src_own/clsArithmeticParser.cpp
include $(BUILD_SHARED_LIBRARY)

Application.mk

#APP_STL := stlport_static
#Build the library by enabling C++11  
APP_STL:=c++_static
APP_LDLIBS    += -llog
#Used the below flag for 
#(Error: '...' handler must be the last handler for its try block [-fpermissive]
#           } catch (const std::out_of_range &) {)
APP_CPPFLAGS += -fexceptions
#Used the below flag for (Error: 'dynamic_cast' not permitted with -fno-rtti)
APP_CPPFLAGS += -frtti
#Architecture to support armeabi-v7a & x86
APP_ABI := armeabi-v7a x86
#Android platform
APP_PLATFORM := android-21

由于我的android ndk版本不支持 thread_local存储类，因此我需要将宏“CHAISCRIPT_HAS_THREAD_LOCAL”取消定义为文件chaiscript_threading.hpp

#undef CHAISCRIPT_HAS_THREAD_LOCAL (you can understand if you refer the source code)

ndk-build output :

ndk-build 
Android NDK: WARNING: APP_PLATFORM android-21 is larger than android:minSdkVersion 9 in ./AndroidManifest.xml    
[armeabi-v7a] Compile++ thumb: chaiscript <= chaiscript_stdlib.cpp
[armeabi-v7a] Compile++ thumb: chaiscript <= main.cpp
[armeabi-v7a] Compile++ thumb: chaiscript <= stl_extra.cpp
[armeabi-v7a] Compile++ thumb: chaiscript <= test_module.cpp
[armeabi-v7a] SharedLibrary  : libchaiscript.so
[armeabi-v7a] Install        : libchaiscript.so => libs/armeabi-v7a/libchaiscript.so
<i ignored the output of [x86] Compile++>

Code Usage :

#include "header_own/NativeFunction.h"
#include "include_CS/chaiscript/chaiscript.hpp"
#include "include_CS/chaiscript/chaiscript_stdlib.hpp"

std::string str;

std::string helloWorld(const std::string &t_name) {
    str = "Hello " + t_name + "!";
    return "Hello " + t_name + "!";
}

JNIEXPORT jstring JNICALL Java_com_example_androidxmldesign_1exercise01_clsNativeFunctionWrapper_invokeNativeFunction(
        JNIEnv *env, jobject obj) {
    chaiscript::ChaiScript chai(chaiscript::Std_Lib::library());
    chai.add(chaiscript::fun(&helloWorld), "helloWorld");
    chai.eval(R"(puts(helloWorld("Bob"));)");
    //below string return value will be appended to a textview
    //existing vlaue
    return env->NewStringUTF(str.c_str());
}

Screen Shot :