7

GCC 4.7.1 を使用するように CodeBlocks をセットアップする方法については、こちらの指示に従いました。前述のページで提供されているサンプルは問題なくコンパイルされていますが、次のコードをコンパイルしようとすると、後でエラーが発生しました。コンパイラ設定 (-std=c++11) を介してコンパイラ C++11 フラグを設定しますが、それでもうまくいきません。コンパイルに失敗するコード:

#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;
}

エラー:

 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) ===|
4

3 に答える 3

7

mingw では、gcc のスレッド サポートは、取得するビルドによって異なります。スレッドをサポートしないビルドもあれば、サポートするビルドもあります。

http://code.google.com/p/mingw-builds/downloads/listの mingw ビルドはスレッドをサポートしていると思います。

于 2012-08-31T06:42:14.477 に答える
2

MinGW は単に「-std=c++0x」でコンパイルできません。奇妙なことに、「-std=gnu++0x」が機能します。

于 2012-08-31T06:42:41.417 に答える