CMake的，锵和C++在OS V11 X 10.8

Question

OS X 1.8

CMake的2.8.9

锵$ clang -v Apple clang version 4.0 (tags/Apple/clang-421.10.60) (based on LLVM 3.1svn) Target: x86_64-apple-darwin12.0.0 Thread model: posix

的CMakeLists.txt：

cmake_minimum_required (VERSION 2.8.9) 
project (Test) 
add_executable(Test main.cpp) 

的main.cpp

//Create a C++11 thread from the main program 
#include <iostream> 
#include <thread> 

//This function will be called from a thread 
void call_from_thread() { 
    std::cout << "Hello, World!" << std::endl; 
} 

int main() { 
    //Launch a thread 
    std::thread t1(call_from_thread); 

    //Join the thread with the main thread 
    t1.join(); 

    return 0; 
} 

我的错误：

$ make 
Scanning dependencies of target Test 
[100%] Building CXX object CMakeFiles/Test.dir/main.cpp.o 
test/main.cpp:4:10: fatal error: 'thread' file not found 
#include <thread> 
    ^
1 error generated. 
make[2]: *** [CMakeFiles/Test.dir/main.cpp.o] Error 1 
make[1]: *** [CMakeFiles/Test.dir/all] Error 2 
make: *** [all] Error 2 

Clang的版本不支持C++ v11功能吗？此相同的程序不能下的gcc-4.7.1编译在OSX 10.8

此引用说，它应该工作http://www.cpprocks.com/a-comparison-of-c11-language-support-in-vs2012-g-4-7-and-clang-3-1/

我在做什么错？

Answer 1

您需要将-std=c++11和-stdlib=libc++标志提供给编译器以完全激活其C++ 11支持。这可以通过ccmake进行（打开高级模式（t），并设置CMAKE_CXX_FLAGS到-std=c++11 -stdlib=libc++），或通过您的CMakeLists.txt等效指令：

cmake_minimum_required(VERSION 2.8.9) 
set(CMAKE_CXX_FLAGS "-std=c++11 -stdlib=libc++") 
project(Test) 
add_executable(Test main.cpp)