C4996 ‘std::fpos＜_Mbstatet＞::seekpos‘: warning STL4019

严重性	代码	说明	项目	文件	行	禁止显示状态
错误	C4996	'std::fpos<_Mbstatet>::seekpos': warning STL4019: The member std::fpos::seekpos() is non-Standard, and is preserved only for compat
ibility with workarounds for old versions of Visual C++. It will be removed in a future release, and in this release always retur
ns 0. Please use standards-conforming mechanisms to manipulate fpos, such as conversions to and from streamoff, or 
an integral type, instead. If you are receiving this message while compiling Boost.IOStreams, a fix has been submitted
 upstream to make Boost use standards-conforming mechanisms, as it does for other compilers. You can 
define _SILENCE_FPOS_SEEKPOS_DEPRECATION_WARNING to acknowledge that you have received this warning, or 
define _REMOVE_FPOS_SEEKPOS to remove std::fpos::seekpos entirely.	pcldll	c:\program files\pcl 1.8.1\3rdparty\boost\include\boost-1_64\boost\iostreams\positioning.hpp	96	

> https://blog.youkuaiyun.com/weixin_44387339/article/details/104155235