Question

我按照指令here设置CodeBlocks以使用GCC 4.7.1。我提到的页面提供的示例编译得很好但是当我尝试编译以下代码时它会产生错误我必须说我甚至通过编译器设置（-std = c ++ 11）设置了编译器C ++ 11标志，但仍然没有运气。无法编译的代码：

#include <iostream>
#include <thread>
#include <vector>

//This function will be called from a thread

void func(int tid) {
    std::cout << "Launched by thread " << tid << std::endl;
}

int main() {
    std::vector<std::thread> th;

    int nr_threads = 10;

    //Launch a group of threads
    for (int i = 0; i < nr_threads; ++i) {
        th.push_back(std::thread(func,i));
    }

    //Join the threads with the main thread
    for(auto &t : th){
        t.join();
    }

    return 0;
}

错误：

 main.cpp||In function 'int main()':|
 main.cpp|13|error: 'thread' is not a member of 'std'|
 main.cpp|13|error: 'thread' is not a member of 'std'|
 main.cpp|13|error: template argument 1 is invalid|
 main.cpp|13|error: template argument 2 is invalid|
 main.cpp|13|error: invalid type in declaration before ';' token|
 main.cpp|19|error: request for member 'push_back' in 'th', which is of non-class type 'int'|
 main.cpp|19|error: 'thread' is not a member of 'std'|
 main.cpp|23|error: no matching function for call to 'begin(int&)'|
 main.cpp|23|note: candidates are:|
 \include\c++\4.7.1\initializer_list|89|note: template<class _Tp> constexpr const _Tp* std::begin(std::initializer_list<_Tp>)|
 \include\c++\4.7.1\initializer_list|89|note:   template argument deduction/substitution failed:|
 main.cpp|23|note:   mismatched types 'std::initializer_list<_Tp>' and 'int'|
 \include\c++\4.7.1\bits\range_access.h|87|note: template<class _Tp, unsigned int _Nm> _Tp* std::begin(_Tp (&)[_Nm])|
 \include\c++\4.7.1\bits\range_access.h|87|note:   template argument deduction/substitution failed:|
 main.cpp|23|note:   mismatched types '_Tp [_Nm]' and 'int'|
 \include\c++\4.7.1\bits\range_access.h|58|note: template<class _Container> decltype (__cont.begin()) std::begin(const _Container&)|
 \include\c++\4.7.1\bits\range_access.h|58|note:   template argument deduction/substitution failed:|
 main.cpp|23|required from here|
 \include\c++\4.7.1\bits\range_access.h|58|error: request for member 'begin' in '__cont', which is of non-class type 'const int'|
 \include\c++\4.7.1\bits\range_access.h|48|note: template<class _Container> decltype (__cont.begin()) std::begin(_Container&)|
 \include\c++\4.7.1\bits\range_access.h|48|note:   template argument deduction/substitution failed:|
 main.cpp|23|required from here|
 \include\c++\4.7.1\bits\range_access.h|48|error: request for member 'begin' in '__cont', which is of non-class type 'int'|
 main.cpp|23|error: no matching function for call to 'end(int&)'|
 main.cpp|23|note: candidates are:|
 \include\c++\4.7.1\initializer_list|99|note: template<class _Tp> constexpr const _Tp* std::end(std::initializer_list<_Tp>)|
 \include\c++\4.7.1\initializer_list|99|note:   template argument deduction/substitution failed:|
 main.cpp|23|note:   mismatched types 'std::initializer_list<_Tp>' and 'int'|
 \include\c++\4.7.1\bits\range_access.h|97|note: template<class _Tp, unsigned int _Nm> _Tp* std::end(_Tp (&)[_Nm])|
 \include\c++\4.7.1\bits\range_access.h|97|note:   template argument deduction/substitution failed:|
 main.cpp|23|note:   mismatched types '_Tp [_Nm]' and 'int'|
 \include\c++\4.7.1\bits\range_access.h|78|note: template<class _Container> decltype (__cont.end()) std::end(const _Container&)|
 \include\c++\4.7.1\bits\range_access.h|78|note:   template argument deduction/substitution failed:|
 main.cpp|23|required from here|
 \include\c++\4.7.1\bits\range_access.h|78|error: request for member 'end' in '__cont', which is of non-class type 'const int'|
 \include\c++\4.7.1\bits\range_access.h|68|note: template<class _Container> decltype (__cont.end()) std::end(_Container&)|
 \include\c++\4.7.1\bits\range_access.h|68|note:   template argument deduction/substitution failed:|
 main.cpp|23|required from here|
 \include\c++\4.7.1\bits\range_access.h|68|error: request for member 'end' in '__cont', which is of non-class type 'int'|
 main.cpp|23|error: unable to deduce 'auto&' from '<expression error>'|
||=== Build finished: 14 errors, 4 warnings (0 minutes, 6 seconds) ===|

Answer 1

使用mingw，gcc的线程支持取决于你获得的构建。有些构建不支持线程，有些构建不支持。

我相信http://code.google.com/p/mingw-builds/downloads/list的mingw构建支持线程。

Answer 2

MinGW根本不会使用'-std = c ++ 0x'进行编译。奇怪的是，' - std = gnu ++ 0x'有效。

Answer 3

尝试MinGw版本：

http://sourceforge.net/projects/mingwbuilds/

此安装程序允许您选择所需的MinGW，还包括c++11线程功能。

gcc 4.7.1支持线程吗？

3 个答案: