在c++ Builder中编译Boost库时的警告

Warnings when compiling Boost libraries in C++ Builder

本文关键字：警告 Boost 编译 c++ Builder      更新时间：2023-10-16

当我试图在c++ Builder中包含<boost/thread.hpp>时，我得到了警告。对于我包含它的每个单元，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

已经尝试了一些方法，但是没有效果。

它编译正确，然而，它让我心烦意乱。为什么要显示这条信息?

#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BOOST_THREAD_DECL下面的{, 69也是。看起来BOOST_THREAD_DECL没有正确定义或定义错误，试图遵循Boost代码并不容易。

添加#在包含thread.hpp之前定义BOOST_THREAD_USE_LIB。

我测试的是:

#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'。

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