Question

当我尝试在C ++ Builder中包含<boost/thread.hpp>时，我收到警告。对于我所包含的每个单元，C ++ Builder显示这两行：

thread_heap_alloc.hpp(59): W8128 Can't import a function being defined
thread_heap_alloc.hpp(69): W8128 Can't import a function being defined

已经尝试了一些东西，但没有任何效果。

它正确编译，然而，它让我感到紧张。为什么要显示此消息？

这些行是：

#include <boost/config/abi_prefix.hpp>

namespace boost
{
    namespace detail
    {
        inline BOOST_THREAD_DECL void* allocate_raw_heap_memory(unsigned size)
        { 
            void* const eap_memory=detail::win32::HeapAlloc(detail::win32::GetProcessHeap(),0,size);
            if(!heap_memory)
            {
                throw std::bad_alloc();
            }
        return heap_memory;
    }

    inline BOOST_THREAD_DECL void free_raw_heap_memory(void* heap_memory)
    {
        BOOST_VERIFY(detail::win32::HeapFree(detail::win32::GetProcessHeap(),0,heap_memory)!=0);
    }

其中59是{下面的BOOST_THREAD_DECL，也就是69.看起来BOOST_THREAD_DECL未正确定义或定义错误，尝试按照Boost代码进行操作并不是容易。

这是Boost 1.39。

Answer 1

在包含thread.hpp之前添加#define BOOST_THREAD_USE_LIB。

这是我测试的：

#define BOOST_THREAD_USE_LIB
extern "C"
{
   namespace boost
   {
      void tss_cleanup_implemented( void )
      {
         /*
         This function's sole purpose is to cause a link error in cases where
         automatic tss cleanup is not implemented by Boost.Threads as a
         reminder that user code is responsible for calling the necessary
         functions at the appropriate times (and for implementing an a
         tss_cleanup_implemented() function to eliminate the linker's
         missing symbol error).

         If Boost.Threads later implements automatic tss cleanup in cases
         where it currently doesn't (which is the plan), the duplicate
         symbol error will warn the user that their custom solution is no
         longer needed and can be removed.*/
      }
   }
}
#include <boost/thread.hpp>

然后设置'Link with Dynamic RTL'和'Link with Runtime Packages'。

这是一个干净的构建并正确启动一个线程。

博客目前正在关闭但此链接将来有效（或编辑为有效，对不起） 我为此撰写了一篇博客文章：http://blog.marionette.ca/cross-platform-threading-for-c-builder-using-boostthread/

在C ++ Builder中编译Boost库时的警告

1 个答案: