error :-1: error: D8021 : invalid numeric argument '/Wextra'

[aminnagpure]

iam working on project blockchain cryptocurrency
but then i compiled it and run on windows 10 64 bit , it throws error
:-1: error: D8021 : invalid numeric argument '/Wextra'

can i know what it is all about

[VRonin]

Looks like you have a '/Wextra' in your code where you probably wanted "/Wextra"

[Paul Colby]

Hi @aminnagpure,

The problem is most likely that the project file (*.pro or CMakeLists.txt) you're using is specifying a compiler flag that is only supported by clang / gcc, but not MSVC.

Specifically, the -Wextra flag is used by clang and gcc (including MinGW) to enable extra compiler warnings. But cl.exe (the Microsoft compiler) does not support that flag (it uses something like /W4 or /Wall instead).

Have you written your own project file?

Cheers.