PreprocessorDefinitions

开个坑

  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
    <ClCompile>
      <WarningLevel>Level3</WarningLevel>
      <SDLCheck>true</SDLCheck>
      <PreprocessorDefinitions>ALWAYSLOAD;WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <ConformanceMode>true</ConformanceMode>
      <PrecompiledHeader>Use</PrecompiledHeader>
      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
    </ClCompile>
    <Link>
      <SubSystem>
      </SubSystem>
      <GenerateDebugInformation>true</GenerateDebugInformation>
    </Link>
  </ItemDefinitionGroup>

然后打开检查这个位置 是否写入了定义 

 

万事俱备 

#include <iostream>
// add headers that you want to pre-compile here

// TODO: This is an example of a library function
void fnStaticLib1()
{
#ifdef ALWAYSLOAD
    std::cout << "ALWAYS LOAD is defined" << std::endl;
#endif
    std::cout << "hello world!!!" << std::endl;
}

#endif //PCH_H