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POWhat's up with the thousands of warnings in standard headers in MSVC -Wall?
 

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  1. POWhat's up with the thousands of warnings in standard headers in MSVC -Wall?
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    <p>Some people seem to advise you use -Wall, but when I did it on a small test project which just has a main.cpp with some includes, I get 5800 warnings most of them in standard headers or in windows headers.</p> <p>Is that intended behaviour? How do I go about making my compilation warning free?</p> <p>Here are just a few for some reading fun:</p> <pre><code>1&gt;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&gt;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&gt;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&gt;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&gt;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&gt;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&gt;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&gt;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&gt;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&gt;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&gt;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&gt;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&gt;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&gt; c:\program files\microsoft visual studio 10.0\vc\include\new(79) : see declaration of 'operator new[]' 1&gt;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&gt; c:\program files\microsoft visual studio 10.0\vc\include\new(77) : see declaration of 'operator delete[]' 1&gt;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&gt;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&gt;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&gt;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&gt;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&gt;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&gt;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&gt;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&gt;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&gt;c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(10131): warning C4820: '&lt;unnamed-tag&gt;' : '3' bytes padding added after data member '&lt;unnamed-tag&gt;::Data' 1&gt;c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(10241): warning C4820: '&lt;unnamed-tag&gt;' : '4' bytes padding added after data member '&lt;unnamed-tag&gt;::DecreaseTime' 1&gt;c:\program files\microsoft sdks\windows\v7.0a\include\winnt.h(10262): warning C4820: '&lt;unnamed-tag&gt;' : '4' bytes padding added after data member '&lt;unnamed-tag&gt;::TimerInterval' 1&gt;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/ </code></pre>
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      1. POWhat's up with the thousands of warnings in standard headers in MSVC -Wall?
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      1. POWhat's up with the thousands of warnings in standard headers in MSVC -Wall?
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    1. COThere's a reason that those warnings are disabled by default. Don't use -Wall
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      1. POWhat's up with the thousands of warnings in standard headers in MSVC -Wall?
      1. USBenjamin Lindley
    2. COGCC has a way to suppress warnings from system and library headers (`-isystem` instead of `-I` and `#pragma GCC system_header`). Is the same not true of VC or does `/Wall` disable even that?
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      1. POWhat's up with the thousands of warnings in standard headers in MSVC -Wall?
      1. USgreyfade
    3. COpossible duplicate of [MSVC - stop warnings in headers](http://stackoverflow.com/questions/4292352/msvc-stop-warnings-in-headers)
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      1. POWhat's up with the thousands of warnings in standard headers in MSVC -Wall?
      1. USCody Gray
 

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