为什么这个简单的c ++ 11线程示例失败,编译时使用clang 3.2? [英] Why does this simple c++11 threading-example fail, when compiled with clang 3.2?
问题描述
我不知道我在这里做错了什么。这个非常短的程序:
I can't figure out what I'm doing wrong here. This very short program:
#include <iostream>
#include <string>
#include <atomic>
#include <thread>
using namespace std;
int
main(int argc, char ** argv)
{
thread foo( []() {
cout << "Hello World" << endl;
return 0;
} );
foo.join();
return 0;
}
2):
It works perfectly when compiled with gcc (4.7.2)
:
$ g++ -ggdb -std=c++11 -pthread -o clang_thread_test clang_thread_test.cpp
$ ./clang_thread_test
Hello World
不过,在编译时与 clang(3.2; x86_64-pc-linux-gnu;线程模型:posix)
无法执行:
However, when compiled with clang (3.2; x86_64-pc-linux-gnu; thread model: posix)
it fails to execute:
$ clang++ -ggdb -std=c++11 -pthread -o clang_thread_test clang_thread_test.cpp
$ ./clang_thread_test
pure virtual method called
terminate called without an active exception
Aborted
是否有此一个已知的原因是什么?我发现的唯一的事情是与缺少 -pthread开关
或不使用的libc ++
。 。据我所知,后者仅适用于苹果系统的相关
Is there a known reason for this? The only things I found were related to a missing -pthread switch
or a not used libc++
. To my knowledge the latter is only relevant on apple-systems.
推荐答案
确认这作品:
clang++ --std=c++11 -pthread -D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 -D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 -D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 -D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
http://gcc.gnu.org /bugzilla/show_bug.cgi?id=53841
chrono线程错误修正:
chrono thread bug fix for:
linux error: no matching constructor for initialization of 'duration'
使用建议的修正:
- const chrono::nanoseconds __delta = __atime - __c_entry;
- const __clock_t::time_point __s_atime = __s_entry
+ __delta; + const auto __delta = __atime - __c_entry;
+ const auto __s_atime = __s_entry
+ __delta; in file condition_variable
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