如何使用的C ++ 0x线程的Android NDK？ [英] How to use c++0x thread in Android NDK?
问题描述
我试图编译这个简单的程序与 Android的NDK-R8B ：
JNI / hello_jni.cpp
的#include＆LT;＆iostream的GT;
＃包括LT＆;螺纹＆GT;你好无效（）
{
性病::法院LT＆;＆LT; 我是一个线程!!! ＆LT;＆LT;的std :: ENDL;
}诠释的main（）
{
的std ::线程日（你好）;
th.join（）;
返回0;
}
JNI / Application.mk
APP_OPTIM：=释放
APP_MODULES：= hello_thread
APP_STL：= gnustl_static
JNI / Android.mk
LOCAL_PATH：= $（叫我-DIR）
包括$（CLEAR_VARS）LOCAL_CPPFLAGS + = -std =的C ++ 0x -frttiLOCAL_MODULE：= hello_thread
LOCAL_LDLIBS：= -L $（SYSROOT）/ usr / lib目录-pthread
LOCAL_SRC_FILES：= hello_thread.cpp包括$（BUILD_EXECUTABLE）
NDK的构建返回我一个错误争吵的线不是性病的成员。
我颁发的 NDK的构建-n ，以使编译命令，并在我的壳单独发出的：
++编译大拇指：hello_thread＆LT; = hello_thread.cpp
从/home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/stdio.h:55:0包含在文件中，
从/home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/wchar.h:33，
从/home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/cwchar:46，
从/home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/bits/postypes.h:42，
从/home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/iosfwd:42，
从/home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/ios:39，
从/home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/ostream:40，
从/home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/iostream:40，
从JNI / hello_thread.cpp：4：
/home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/sys/types.h:124:9：错误：uint64_t中没有指定类型
/home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp：在函数'廉政的main（）：
/home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp:14:5：错误：线程不是性病的一员
/home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp:14:17：错误：预期';'之前，'日'
/home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp:15:5：错误：'日'不是在这个范围内声明
我读了很多关于POSIX线程和C ++线程的线程/问题，但仍然无法找到我的答案。我的 ARM-Linux的androideabi /有/ C ++ / 4.6 /线程文件定义类线 STD 仅
＃如果定义（_GLIBCXX_HAS_GTHREADS）及和放大器;定义（_GLIBCXX_USE_C99_STDINT_TR1）
他们似乎并不在我的SDK进行定义（C ++的config.h）。但是，我怎么可能把他们安全上？我是否需要编写我自己的工具链使用（非P）的主题？我的主机是：
Linux的evigier-的ThinkPad-X220 3.0.0-17泛型＃30 Ubuntu的SMP周四3月8日20时45分39秒UTC 2012 x86_64的x86_64的x86_64的GNU / Linux的
的Android NDK R8B自带GCC 4.6，并且不包含C ++ 11线程任何实现。您必须提供自己的实现，并有可能建立自己独立的gcc工具。
检查这些页面在GCC C ++ 11的支持：
- http://gcc.gnu.org/projects/cxx0x.html
- http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.200x
POSIX线程是一个完全不同的故事，你可以在Android的NDK中使用它们。您将需要至少在pthread_create（）， pthread_detach（）和在pthread_join（）调用来做到这一点。
I am trying to compile this simple program with android-ndk-r8b:
jni/hello_jni.cpp
#include <iostream>
#include <thread>
void hello()
{
std::cout << "Hi i'm a thread!!!" << std::endl;
}
int main()
{
std::thread th(hello);
th.join();
return 0;
}
jni/Application.mk
APP_OPTIM := release
APP_MODULES := hello_thread
APP_STL := gnustl_static
jni/Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_CPPFLAGS += -std=c++0x -frtti
LOCAL_MODULE := hello_thread
LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -pthread
LOCAL_SRC_FILES := hello_thread.cpp
include $(BUILD_EXECUTABLE)
ndk-build returns me an error arguin that 'thread' is not a member of 'std'. I issued ndk-build -n to get the compilation command and issued it alone in my shell:
/home/evigier/android-ndk-r8b/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi-g++ -MMD -MP -MF /home/evigier/eclipse_workspace/hello_thread/obj/local/armeabi/objs/hello_thread/hello_thread.o.d -fpic -ffunction-sections -funwind-tables -fstack-protector -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -march=armv5te -mtune=xscale -msoft-float -fno-exceptions -fno-rtti -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -I/home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include -I/home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/libs/armeabi/include -I/home/evigier/eclipse_workspace/hello_thread/jni -DANDROID -Wa,--noexecstack -std=c++0x -frtti -O2 -DNDEBUG -g -I/home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include -c /home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp -o /home/evigier/eclipse_workspace/hello_thread/obj/local/armeabi/objs/hello_thread/hello_thread.o
Compile++ thumb : hello_thread <= hello_thread.cpp
In file included from /home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/stdio.h:55:0,
from /home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/wchar.h:33,
from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/cwchar:46,
from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/bits/postypes.h:42,
from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/iosfwd:42,
from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/ios:39,
from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/ostream:40,
from /home/evigier/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/iostream:40,
from jni/hello_thread.cpp:4:
/home/evigier/android-ndk-r8b/platforms/android-14/arch-arm/usr/include/sys/types.h:124:9: error: 'uint64_t' does not name a type
/home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp: In function 'int main()':
/home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp:14:5: error: 'thread' is not a member of 'std'
/home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp:14:17: error: expected ';' before 'th'
/home/evigier/eclipse_workspace/hello_thread/jni/hello_thread.cpp:15:5: error: 'th' was not declared in this scope
I read a lot of threads/questions about POSIX threads and C++ threads, but still cannot find my answer. My arm-linux-androideabi/include/c++/4.6/thread file defines class thread in std only:
#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
They don't seem to be defined in my sdk (c++config.h). But how can I possibly turn them on safely? Do i need to compile my own toolchain to use (non-p)threads? My host computer is :
Linux evigier-ThinkPad-X220 3.0.0-17-generic #30-Ubuntu SMP Thu Mar 8 20:45:39 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
Android NDK r8b comes with gcc 4.6 and does not contain any implementation of C++11 threads. You will have to provide your own implementations and possibly build your own standalone gcc toolchain.
Check these pages for C++11 support in gcc:
- http://gcc.gnu.org/projects/cxx0x.html
- http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.200x
POSIX threads is a completely different story and you can use them in Android NDK. You will need at least pthread_create(), pthread_detach() and pthread_join() calls to do it.
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