Default Visual Studio compiler parameters and what they mean

vs_parameters.txt

/permissive-                           standards conformance
/MP                                    build with multiple processors
/GS                                    buffer security check
/Qpar                                  auto-parallelizer
/GL                                    whole program optimization
/W3                                    warning level
/wd"4305"                              identifier' : truncation from 'type1' to 'type2'
/Gy                                    enable function-level linking
/Zc:wchar_t                            wchar_t is native type
/Zi                                    debug information format
/Gm-                                   enable minimal rebuild (what does the - mean? disabled?)
/O2                                    optimization levels
/Ob2                                   inline function expansion
/sdl                                   enable additional security checks
/Fd"build\x64\Release\vc141.pdb"       program database file name
/Zc:inline                             remove unreferenced COMDAT
/fp:precise                            specify floating point behavior, precise (default)
/D "_CRT_SECURE_NO_WARNINGS"           no warnings on "dangerous" C functions
/D "_MBCS"                             support for multibyte character sets
/fp:except                             specify floating point behavior, reliable floating point exception model
/errorReport:prompt                    report internal compiler errors
/GF                                    eliminate duplicate strings
/GT                                    support fiber-safe thread-local storage
/WX-                                   treat linker warnings as errors (disabled?)
/Zc:forScope                           force conformance in for loop scope
/Gd                                    calling convention, cdecl (default)
/Oi                                    generate intrinsic functions
/MT                                    use multithreaded static run-time library
/FC                                    full path of source code file in diagnostics
/Fa"build\x64\Release"                 listing file (one asm file for each source file)
/EHsc                                  unwinding exception handling model 
/nologo                                //
/Fo"build\x64\Release"                 file object name
/Ot                                    favor fast code
/Fp"build\x64\Release\vcg.pch"         name pch file
/diagnostics:classic                   //