C++ 什么'；在MSVC-Wall的标准标题中出现了数千条警告？

有些人似乎建议您使用-Wall，但当我在一个只有main.cpp和一些include的小测试项目上这样做时，我收到了5800条警告，其中大多数警告出现在标准标题或windows标题中

这是故意的行为吗？我如何让我的编译警告免费

以下是一些阅读乐趣：

1>c:\program files\microsoft visual studio 10.0\vc\include\stdint.h(105): warning C4668: '_INTPTR' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif'
1>c:\program files\microsoft visual studio 10.0\vc\include\wchar.h(109): warning C4820: '_wfinddata64i32_t' : '4' bytes padding added after data member '_wfinddata64i32_t::attrib'
1>c:\program files\microsoft visual studio 10.0\vc\include\wchar.h(114): warning C4820: '_wfinddata64i32_t' : '4' bytes padding added after data member '_wfinddata64i32_t::name'
1>c:\program files\microsoft visual studio 10.0\vc\include\wchar.h(118): warning C4820: '_wfinddata64_t' : '4' bytes padding added after data member '_wfinddata64_t::attrib'
1>c:\program files\microsoft visual studio 10.0\vc\include\wchar.h(488): warning C4820: '_stat32' : '2' bytes padding added after data member '_stat32::st_gid'
1>c:\program files\microsoft visual studio 10.0\vc\include\wchar.h(504): warning C4820: 'stat' : '2' bytes padding added after data member 'stat::st_gid'
1>c:\program files\microsoft visual studio 10.0\vc\include\wchar.h(520): warning C4820: '_stat32i64' : '2' bytes padding added after data member '_stat32i64::st_gid'
1>c:\program files\microsoft visual studio 10.0\vc\include\wchar.h(521): warning C4820: '_stat32i64' : '4' bytes padding added after data member '_stat32i64::st_rdev'
1>c:\program files\microsoft visual studio 10.0\vc\include\wchar.h(525): warning C4820: '_stat32i64' : '4' bytes padding added after data member '_stat32i64::st_ctime'
1>c:\program files\microsoft visual studio 10.0\vc\include\wchar.h(534): warning C4820: '_stat64i32' : '2' bytes padding added after data member '_stat64i32::st_gid'
1>c:\program files\microsoft visual studio 10.0\vc\include\wchar.h(548): warning C4820: '_stat64' : '2' bytes padding added after data member '_stat64::st_gid'
1>c:\program files\microsoft visual studio 10.0\vc\include\wchar.h(549): warning C4820: '_stat64' : '4' bytes padding added after data member '_stat64::st_rdev'
1>c:\program files\microsoft visual studio 10.0\vc\include\crtdbg.h(1078): warning C4986: 'operator new[]': exception specification does not match previous declaration
1>          c:\program files\microsoft visual studio 10.0\vc\include\new(79) : see declaration of 'operator new[]'
1>c:\program files\microsoft visual studio 10.0\vc\include\crtdbg.h(1095): warning C4986: 'operator delete[]': exception specification does not match previous declaration
1>          c:\program files\microsoft visual studio 10.0\vc\include\new(77) : see declaration of 'operator delete[]'
1>c:\program files\microsoft visual studio 10.0\vc\include\typeinfo(76): warning C4820: 'type_info' : '3' bytes padding added after data member 'type_info::_M_d_name'
1>c:\program files\microsoft sdks\windows\v7.0a\include\basetsd.h(114): warning C4668: '__midl' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif'
1>c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(8154): warning C4820: '_SECURITY_QUALITY_OF_SERVICE' : '2' bytes padding added after data member '_SECURITY_QUALITY_OF_SERVICE::EffectiveOnly'
1>c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(8165): warning C4820: '_SE_IMPERSONATION_STATE' : '2' bytes padding added after data member '_SE_IMPERSONATION_STATE::EffectiveOnly'
1>c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(8334): warning C4820: '_QUOTA_LIMITS' : '4' bytes padding added after data member '_QUOTA_LIMITS::PagefileLimit'
1>c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(8357): warning C4820: '_QUOTA_LIMITS_EX' : '4' bytes padding added after data member '_QUOTA_LIMITS_EX::PagefileLimit'
1>c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(8405): warning C4820: '_JOBOBJECT_BASIC_LIMIT_INFORMATION' : '4' bytes padding added after data member '_JOBOBJECT_BASIC_LIMIT_INFORMATION::SchedulingClass'
1>c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(8984): warning C4820: '_FILE_NOTIFY_INFORMATION' : '2' bytes padding added after data member '_FILE_NOTIFY_INFORMATION::FileName'
1>c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(9012): warning C4820: '_REPARSE_GUID_DATA_BUFFER' : '3' bytes padding added after data member '_REPARSE_GUID_DATA_BUFFER::GenericReparseBuffer'
1>c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(10131): warning C4820: '<unnamed-tag>' : '3' bytes padding added after data member '<unnamed-tag>::Data'
1>c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(10241): warning C4820: '<unnamed-tag>' : '4' bytes padding added after data member '<unnamed-tag>::DecreaseTime'
1>c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(10262): warning C4820: '<unnamed-tag>' : '4' bytes padding added after data member '<unnamed-tag>::TimerInterval' 
1>c:\program files\microsoft sdks\windows\v7.0a\include\wincrypt.h(1440): warning C4668: 'NTDDI_WINLH' is not defined as a preprocessor macro, replacing with '0' for '#if/

1>c:\program files\microsoft visual studio 10.0\vc\include\stdint.h（105）：警告C4668:“_INTPTR”未定义为预处理器宏，替换为“#if/#elif”的“0”
1> c:\program files\microsoft visual studio 10.0\vc\include\wchar.h（109）：警告C4820:“\u wfinddata64i32\u t”：“4”字节填充添加在数据成员“\u wfinddata64i32\u t:：attrib”之后
1> c:\program files\microsoft visual studio 10.0\vc\include\wchar.h（114）：警告C4820:“\u wfinddata64i32\u t”：“4”字节填充添加在数据成员“\u wfinddata64i32\u t:：name”之后
1> c:\program files\microsoft visual studio 10.0\vc\include\wchar.h（118）：警告C4820:“\u wfinddata64\u t”：“4”字节填充添加在数据成员“\u wfinddata64\u t:：attrib”之后
1> c:\program files\microsoft visual studio 10.0\vc\include\wchar.h（488）：警告C4820:“\u stat32”：“2”字节填充添加在数据成员“\u stat32:：st\u gid”之后
1> c:\program files\microsoft visual studio 10.0\vc\include\wchar.h（504）：警告C4820:“stat”：“2”字节填充添加在数据成员“stat:：st_gid”之后
1> c:\program files\microsoft visual studio 10.0\vc\include\wchar.h（520）：警告C4820:“\u stat32i64”：“2”字节填充添加在数据成员“\u stat32i64:：st\u gid”之后
1> c:\program files\microsoft visual studio 10.0\vc\include\wchar.h（521）：警告C4820:“\u stat32i64”：“4”字节填充添加在数据成员“\u stat32i64:：st\u rdev”之后
1> c:\program files\microsoft visual studio 10.0\vc\include\wchar.h（525）：警告C4820:“\u stat32i64”：“4”字节填充添加在数据成员“\u stat32i64:：st\u ctime”之后
1> c:\program files\microsoft visual studio 10.0\vc\include\wchar.h（534）：警告C4820:“\u stat64i32”：“2”字节填充添加在数据成员“\u stat64i32:：st\u gid”之后
1> c:\program files\microsoft visual studio 10.0\vc\include\wchar.h（548）：警告C4820:“\u stat64”：“2”字节填充添加在数据成员“\u stat64:：st\u gid”之后
1> c:\program files\microsoft visual studio 10.0\vc\include\wchar.h（549）：警告C4820:“\u stat64”：“4”字节填充添加在数据成员“\u stat64:：st\u rdev”之后
1> c:\program files\microsoft visual studio 10.0\vc\include\crtdbg.h（1078）：警告C4986:“操作员新建[]”：异常规范与以前的声明不匹配
1> c:\program files\microsoft visual studio 10.0\vc\include\new（79）：请参阅“operator new[]的声明”
1> c:\program files\microsoft visual studio 10.0\vc\include\crtdbg.h（1095）：警告C4986:“操作员删除[]”：异常规范与以前的声明不匹配
1> c:\program files\microsoft visual studio 10.0\vc\include\new（77）：参见“操作员删除[]”声明
1> c:\program files\microsoft visual studio 10.0\vc\include\typeinfo（76）：警告C4820:“类型信息”：“3”字节填充添加在数据成员“类型信息：”之后
1> c:\program files\microsoft SDK\windows\v7.0a\include\basetsd.h（114）：警告C4668:“\uu midl”未定义为预处理器宏，替换为“\if/\elif”的“0”
1> c:\program files\microsoft SDK\windows\v7.0a\include\winnt.h（8154）：警告C4820:“\u SECURITY\u QUALITY\u OF\u SERVICE”：“2”字节填充添加在数据成员“\u SECURITY\u QUALITY\u OF\u SERVICE:：EffectiveOnly”之后
1> c:\program files\microsoft SDK\windows\v7.0a\include\winnt.h（8165）：警告C4820:“\u SE\u IMPERSONATION\u STATE”：“2”字节填充添加在数据成员“\u SE\u IMPERSONATION\u STATE:：EffectiveOnly”之后
1> c:\program files\microsoft SDK\windows\v7.0a\include\winnt.h（8334）：警告C4820:“\u QUOTA\u LIMITS”：“4”字节填充添加在数据成员“\u QUOTA\u LIMITS:：PagefileLimit”之后
1> c:\program files\microsoft SDK\windows\v7.0a\include\winnt.h（8357）：警告C4820:“\u QUOTA\u LIMITS\u EX”：“4”字节填充添加在数据成员“\u QUOTA\u LIMITS\u EX:：PagefileLimit”之后
1> c:\program files\microsoft SDK\windows\v7.0a\include\winnt.h（8405）：警告C4820:“\u JOBOBJECT\u BASIC\u LIMIT\u INFORMATION”：在数据成员“\u JOBOBJECT\u BASIC\u LIMIT\u INFORMATION:：SchedulingClass”之后添加了“4”字节填充
1> c:\program files\microsoft SDK\windows\v7.0a\include\winnt.h（8984）：警告C4820:“\u FILE\u NOTIFY\u INFORMATION”：“2”字节填充添加在数据成员“\u FILE\u NOTIFY\u INFORMATION:：FileName”之后
1> c:\program files\microsoft SDK\windows\v7.0a\include\winnt.h（9012）：警告C4820:“\u repasse\u GUID\u DATA\u BUFFER”：“3”字节填充添加在数据成员“\u repasse\u GUID\u DATA\u BUFFER:：GenericReparseBuffer”之后
1> c:\program files\microsoft SDK\windows\v7.0a\include\winnt.h（10131）：警告C4820:“'3'字节填充添加到数据成员'：：数据”
1> c:\program files\microsoft SDK\windows\v7.0a\include\winnt.h（10241）：警告C4820:“'4'字节填充添加到数据成员'：：DecreaseTime'
1> c:\program files\microsoft SDK\windows\v7.0a\include\winnt.h（10262）：警告C4820:“'4'字节填充添加到数据成员'：：TimerInterval'
1> c:\program files\microsoft SDK\windows\v7.0a\include\wincrypt.h（1440）：警告C4668：“NTDDI\u WINLH”未定义为预处理器宏，如果/
 > p> > MSVC使用<代码> /W4< /代码> .< /P> < P> VisualC++ >代码> /Wrime/Coo> >在>/W4中启用默认禁用的所有警告。正如您所发现的，有一个很好的理由可以解释为什么许多警告在默认情况下被禁用（谢谢编译器告诉我您添加了填充；我真的很感激！）。最好在Visual C++上使用<代码> /W4 < /代码> .<
英特尔C++也是这样（我不知道其他使用EDG前端的编译器）。如果您将其设置为
/W5
，它会发出大量信息。我个人最喜欢的是，它会警告你
#pragma warning(push, 0)       
//Some includes with unfixable warnings
#pragma warning(pop)

#pragma warning( push )
#pragma warning( disable : 4081)
#pragma warning( disable : 4706 )
// system header includes 
#pragma warning( pop )

#pragma warning( disable : 4305)

#pragma warning( default : 4305)