How to solve the problem C++17 std::byte and win sdk byte namespace ambigus

[nicker player]

when i used the windows sdk then i found the byte defined named ambigus.
some one told me about "_HAS_STD_BYTE=0"
but i pressed the code seemed dosent work.
So how to solve it?
By the way,Im using the qt5.14&mingw32 compile program.

[JonB]

@nicker-player
Somebody asked this question recently. I suggested they try putting the #include <windows.h> directive as the very first line in whichever .cpp file(s), before including any Qt stuff. And they said that worked, try it?
Ahh, found page: https://forum.qt.io/topic/137337/including-windows-h-gives-error

[nicker player]

@JonB
In fact it dosent work
I put the code with config += c++17 alone with the single project it could run.So i think it not the major reason.
When i messured these codes into the whole project,It cames the bugs of ambigus.
Cause i dont know where I included the wrong head files ,so many files to lookfor .And in fact i dont know how to solve the problem in your way|.......

[JonB]

@nicker-player said in How to solve the problem C++17 std::byte and win sdk byte namespace ambigus:

In fact it dosent work

Well it worked for the other person. I don't see any relevance to c++17. Did you even try what I said about the #include <windows.h>, because you do not say anything about that?

[nicker player]

@JonB
I used the third part dll named 7z.dll
And i dont know where to fix the include <windows.h>
I include the windows.h in the preheadfile but it doesent work.

[JonB]

@nicker-player said in How to solve the problem C++17 std::byte and win sdk byte namespace ambigus:

And i dont know where to fix the include <windows.h>

I said to you: before anything Qt is included. That would be for <windows.h> or for whatever you use which could include that, such as whatever you include for 7z.dll, which you do not mention.

[nicker player]

@JonB
I include the windows.h in the preheadfile but it doesent work.
Did you mean that
I put the <windows.h> into the preheader file of the project.
Is it right ?I just did like i've mentioned but it also dosent work.

[jsulm]

@nicker-player said in How to solve the problem C++17 std::byte and win sdk byte namespace ambigus:

I put the <windows.h> into the preheader file of the project.

No
In the file where you have

#include <windows.h>

make sure it is above any Qt header includes.