我正在尝试编译一个程序，我在 Ubuntu 18.04 和 Windows 10 上编译时没有遇到任何问题。但是，当我尝试在 OSX High Sierra 上编译它时，出现错误，它们只与 boost 有关。

这是一个例子:

#include <boost/process.hpp>
#include <iostream>

int main()
{
  std::cout << "This is a test." << std::endl;
}

然后我尝试用 g++ 和 clang 编译程序，如下所示:

g++ -std=c++11 test.cpp -lpthread

然后我得到了这个巨大的错误:

In file included from test.cpp:1:
In file included from /usr/local/include/boost/process.hpp:24:
In file included from /usr/local/include/boost/process/async_system.hpp:22:
In file included from /usr/local/include/boost/process/child.hpp:21:
In file included from /usr/local/include/boost/process/detail/child_decl.hpp:30:
/usr/local/include/boost/process/detail/posix/wait_for_exit.hpp:60:7: error: expected unqualified-id
    ::sigemptyset(&sigset);
      ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/signal.h:125:26: note: expanded from macro 'sigemptyset'
#define sigemptyset(set)        (*(set) = 0, 0)
                                ^
In file included from test.cpp:1:
In file included from /usr/local/include/boost/process.hpp:24:
In file included from /usr/local/include/boost/process/async_system.hpp:22:
In file included from /usr/local/include/boost/process/child.hpp:21:
In file included from /usr/local/include/boost/process/detail/child_decl.hpp:30:
/usr/local/include/boost/process/detail/posix/wait_for_exit.hpp:61:7: error: expected unqualified-id
    ::sigaddset(&sigset, SIGCHLD);
      ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/signal.h:122:31: note: expanded from macro 'sigaddset'
#define sigaddset(set, signo)   (*(set) |= __sigbits(signo), 0)
                                ^
In file included from test.cpp:1:
In file included from /usr/local/include/boost/process.hpp:24:
In file included from /usr/local/include/boost/process/async_system.hpp:22:
In file included from /usr/local/include/boost/process/child.hpp:21:
In file included from /usr/local/include/boost/process/detail/child_decl.hpp:30:
/usr/local/include/boost/process/detail/posix/wait_for_exit.hpp:87:26: error: no member named 'sigtimedwait' in the global namespace
        auto ret_sig = ::sigtimedwait(&sigset, nullptr, &ts);
                       ~~^
In file included from test.cpp:1:
In file included from /usr/local/include/boost/process.hpp:25:
In file included from /usr/local/include/boost/process/group.hpp:32:
/usr/local/include/boost/process/detail/posix/wait_group.hpp:64:7: error: expected unqualified-id
    ::sigemptyset(&sigset);
      ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/signal.h:125:26: note: expanded from macro 'sigemptyset'
#define sigemptyset(set)        (*(set) = 0, 0)
                                ^
In file included from test.cpp:1:
In file included from /usr/local/include/boost/process.hpp:25:
In file included from /usr/local/include/boost/process/group.hpp:32:
/usr/local/include/boost/process/detail/posix/wait_group.hpp:65:7: error: expected unqualified-id
    ::sigaddset(&sigset, SIGCHLD);
      ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/signal.h:122:31: note: expanded from macro 'sigaddset'
#define sigaddset(set, signo)   (*(set) |= __sigbits(signo), 0)
                                ^
In file included from test.cpp:1:
In file included from /usr/local/include/boost/process.hpp:25:
In file included from /usr/local/include/boost/process/group.hpp:32:
/usr/local/include/boost/process/detail/posix/wait_group.hpp:90:17: error: no member named 'sigtimedwait' in the global namespace
        ret = ::sigtimedwait(&sigset, nullptr, &ts);
              ~~^
6 errors generated.

我可能缺少一个编译器标志，我已经尝试过 -lboost_system 但给出了完全相同的错误。如果这个特定的库与 OSX 不兼容，那么我会尝试找到解决方法，但这个库已经嵌入到我当前使用的代码中。

是否有任何已知的修复方法？

最佳答案

你是对的。 As of 1.69.0 Boost.Process is broken on MacOS.有关详细信息，请点击错误报告的链接。

错误报告中给出了一个解决方法，可以让它在 MacOS 上编译:

Turns out that MacOS isn't the only platform that defines sigemptyset, sigaddset. That is an easy fix since all you need to do is drop the :: qualifier. As for the sigtimedwait, that too isn't common on all platforms. Strangely, stripping the :: qualifier from that one gets the code to compile. I am guessing that template is never instantiated so the fact the method does not exits isn't causing us problems.

I can supply a patch but it is nothing more than stripping :: from those 3 identifiers.

包含一个全面的补丁 in the Flint project .请注意，如果您选择在您的代码中包含他们的补丁，Flint 是 MIT 许可的

关于c++ - Boost 1.69 中的某些库是否与 MacOS 不兼容？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/54911422/