的Android NDK R9B和编译C ++ 11 [英] Android NDK r9b and compiling C++11
问题描述
我试图编译使用NDK R9B一些C ++ 11 code，但不管我怎么努力也无法正常工作。编译没有C ++ 11功能正常工作。
下面是我的Application.mk：
NDK_TOOLCHAIN_VERSION：= 4.8
APP_STL：= gnustl_static
下面是我的Android.mk：
LOCAL_PATH：= $（叫我-DIR）
包括$（CLEAR_VARS）
file_list中：= $（通配符$（LOCAL_PATH）/ * CPP）。
LOCAL_CPPFLAGS：= -std = C ++ 11 -pthread -frtti -fexceptions
LOCAL_MODULE：= RAGEAndroid
LOCAL_SRC_FILES：= jni.c $（file_list中：$（LOCAL_PATH）/％=％）
LOCAL_LDLIBS：= -llog -lm -landroid -lGLESv3
包括$（BUILD_SHARED_LIBRARY）
我已经尝试设置下面太没有运气：
LOCAL_CFLAGS：= -D__GXX_EXPERIMENTAL_CXX0X__
LOCAL_CPPFLAGS：= -std = GNU + 11 -pthread -frtti -fexceptions
我已经确保了Eclipse有在C以下路径++常规 - >路径和符号
（NDK路径）/来源/ CXX-STL / GNU-的libstdc ++ / 4.8 /包括
（NDK路径）/来源/ CXX-STL / GNU-的libstdc ++ / 4.8 /库/ armeabi /包括
我有一个C文件（jni.c）和一对夫妇测试CPP / HPP的。一切编译罚款没有任何C ++ 11的功能，其中包括像＆LT;螺纹＆GT;或LT;内存＆GT;不会造成任何的抱怨，但是当实际创建我碰到一个类型的std ::线程无法解析一个std ::线程对象。这也发生在其他功能我想使用（标准::的unique_ptr，的std :: shared_ptr的，性病::移动（）等）。
我读过许多议题上获得C ++ 11编译，但似乎没有任何工作，我相信我已经错过了一些东西，但无法弄清楚它是什么。任何帮助将是AP preciated！
编辑：如果我打印__cplusplus它显示201103L，所以它看起来像它使用的是正确的版本
编辑2：性病::原子似乎正常工作
对不起，下面应该是一个评论，而不是答案 - 因为我不知道什么是错在你的code，但在这里是你可以做什么来找出自己：
下面是我最小的 Android.mk
LOCAL_PATH：= $（叫我-DIR）
包括$（CLEAR_VARS）
LOCAL_MODULE：= HELLO-JNI
LOCAL_SRC_FILES：= HelloJni.cpp
LOCAL_LDLIBS：= -llog
包括$（BUILD_SHARED_LIBRARY）
Application.mk
APP_CPPFLAGS：= -std = C + + 11
NDK_TOOLCHAIN_VERSION = 4.8
APP_STL = gnustl_static
这里是最小的 HelloJni.cpp
的#include＆LT; jni.h＆GT;
＃包括＆LT;螺纹＆GT;
无效doSomeWork（无效）
{
__android_log_print（ANDROID_LOG_DEBUG，HelloJni，你好，从线程...）;
返回;
}
为externC
的jstring
Java_com_example_hellojni_HelloJni_stringFromJNI（JNIEnv的* ENV，
jobject THIZ）
{
的std ::线程t（doSomeWork）;
t.join（）;
返回ENV-＆GT; NewStringUTF（你好来自JNI！）;
}
它建立干净的 R9B 我的Mac上。有一件事来检查：运行 NDK建造V = 1 ，并确保链接步骤类似于
和检查命令的输出
<$p$p><$c$c>~/android-ndk-r9b/toolchains/arm-linux-androideabi-4.8/$p$pbuilt/darwin-x86/bin/arm-linux-androideabi-nm -C〜/ Android的NDK-R9B /来源/ CXX-STL / GNU-的libstdc ++ / 4.8 /库/ armeabi / libgnustl_static.a | grep的的std ::线程下面是我所得到的：
00000000牛逼的std ::螺纹:: _ M_start_thread（的std :: shared_ptr的＆LT;的std ::螺纹:: _ Impl_base＆GT;）
00000000牛逼的std ::螺纹:: hardware_concurrency（）
00000000牛逼的std ::螺纹::连接（）
00000000牛逼的std ::螺纹::分离（）
I'm trying to compile some C++11 code using NDK r9b, however no matter what I try it doesn't work. Compiling without C++11 features works fine.
Here is my Application.mk:
NDK_TOOLCHAIN_VERSION := 4.8
APP_STL := gnustl_static
Here is my Android.mk:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
FILE_LIST := $(wildcard $(LOCAL_PATH)/*.cpp)
LOCAL_CPPFLAGS := -std=c++11 -pthread -frtti -fexceptions
LOCAL_MODULE := RAGEAndroid
LOCAL_SRC_FILES := jni.c $(FILE_LIST:$(LOCAL_PATH)/%=%)
LOCAL_LDLIBS := -llog -lm -landroid -lGLESv3
include $(BUILD_SHARED_LIBRARY)
I have tried setting the following too without luck:
LOCAL_CFLAGS := -D__GXX_EXPERIMENTAL_CXX0X__
LOCAL_CPPFLAGS := -std=gnu++11 -pthread -frtti -fexceptions
I have ensured that Eclipse has the following paths in C++ general->Paths and Symbols
(ndk path)/sources/cxx-stl/gnu-libstdc++/4.8/include
(ndk path)/sources/cxx-stl/gnu-libstdc++/4.8/libs/armeabi/include
I have one C file (jni.c) and a couple of test cpp/hpp. Everything compiles fine without any C++11 features, and including something like <thread> or <memory> doesn't cause any complaints, however when actually creating a std::thread object I get "Type 'std::thread' could not be resolved". This also happens with other features I am trying to use (std::unique_ptr, std::shared_ptr, std::move() e.t.c).
I've read many topics on getting C++11 to compile but nothing seems to work, I believe I've missed something but can't figure out what it is. Any help would be appreciated!
EDIT: If I print __cplusplus it shows 201103L, so it looks like it's using the correct version.
EDIT 2: std::atomic seems to work fine.
I'm sorry, the following should have been a comment, not answer - because I don't know what's wrong in your code, but here is what you can do to figure out yourself:
Here's my minimal Android.mk:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := hello-jni
LOCAL_SRC_FILES := HelloJni.cpp
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)
Application.mk
APP_CPPFLAGS := -std=c++11
NDK_TOOLCHAIN_VERSION=4.8
APP_STL=gnustl_static
And here is the minimal HelloJni.cpp
#include <jni.h>
#include <thread>
void doSomeWork( void )
{
__android_log_print(ANDROID_LOG_DEBUG, "HelloJni", "hello from thread...");
return;
}
extern "C"
jstring
Java_com_example_hellojni_HelloJni_stringFromJNI( JNIEnv* env,
jobject thiz )
{
std::thread t( doSomeWork );
t.join();
return env->NewStringUTF("Hello from JNI !");
}
It builds clean in r9b on my Mac. One thing to check: run ndk-build V=1 and make sure that the link step is similar to
~/android-ndk-r9b/toolchains/arm-linux-androideabi-4.8/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-g++ -Wl,-soname,libhello-jni.so -shared --sysroot=~/android-ndk-r9b/platforms/android-17/arch-arm ./obj/local/armeabi/objs-debug/hello-jni/HelloJni.o ~/android-ndk-r9b/sources/cxx-stl/gnu-libstdc++/4.8/libs/armeabi/libgnustl_static.a -lgcc -no-canonical-prefixes -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -L~/android-ndk-r9b/platforms/android-17/arch-arm/usr/lib -llog -lc -lm -o ./obj/local/armeabi/libhello-jni.so
and check output of command
~/android-ndk-r9b/toolchains/arm-linux-androideabi-4.8/prebuilt/darwin-x86/bin/arm-linux-androideabi-nm -C ~/android-ndk-r9b/sources/cxx-stl/gnu-libstdc++/4.8/libs/armeabi/libgnustl_static.a | grep std::thread
Here is what I get:
00000000 T std::thread::_M_start_thread(std::shared_ptr<std::thread::_Impl_base>)
00000000 T std::thread::hardware_concurrency()
00000000 T std::thread::join()
00000000 T std::thread::detach()
这篇关于的Android NDK R9B和编译C ++ 11的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
