Error on Qt 6 Building from source for Windows Based

[Lemat]

@jsulm

My qt6vars.cmd:

REM Set up Microsoft Visual Studio 2019, where <arch> is amd64, x86, etc.
CALL "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsall.bat" amd64
SET _ROOT=C:\Qt\Qt-6
SET PATH=%_ROOT%\qtbase\bin;%_ROOT%\gnuwin32\bin;%PATH%
REM Uncomment the below line when using a git checkout of the source repository
REM SET PATH=%_ROOT%\qtrepotools\bin;%PATH%
SET _ROOT=

[Pablo J. Rogina]

@Lemat said in Error on Qt 6 Building from source for Windows Based:

C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.28.29333/bin/Hostx64/x64/cl.exe

I'm not very familiar with Windows build environment, but is that OK?
I mean, it looks like the 64 bit version of cl.exe is being used, but it's strange that the Visual Studio installation went to the x86 folder, as a 32 bit application?

Could you please describe your environment? i.e. Windows OS version and platform, same for Visual Studio.

[Lemat]

@jsulm
owww !!, that is the CXX variable i set in system environment. i should change it to vcvarsall.bat

[Lemat]

@Lemat
right ? you agree ?

[Lemat]

@Pablo-J-Rogina

Windows 10 Professional 20H2 19042.685 X64

Microsoft Visual Studio Community 2019
Version 16.8.4

i use this same MSVC version to build my Qt x64 apps.

[Lemat]

@jsulm

or what is the right compiler path ? this one ?: C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\14.28.29333\bin\Hostx64\x64

[jsulm]

@Lemat I think that path is correct. Visual Studio itself is a x86 application, but it has compiler which generates x86_64 binaries.

[Lemat]

@jsulm all right

[Lemat]

should i set a real compiler path in the system environment variable CXX ?? i don't know the real compiler file name. my actual Qt 5.15.2 has detected it automatically. i am looking in her settings to find the compiler file name, but nothing.

[jsulm]

@Lemat I don't think so. It should work as described on that web page. I don't know why it doesn't work for you.

[Lemat]

i really need help for that. i tried anything, but nothing. Maybe cmake version ?

[Lemat]

Tools used:
Cmake version: 3.18.4 x64
Python: 3.7.3 x64
ActivePerl: 5.28 x64
Ninja: 1.10.2

[SGaist]

Hi,

IIRC, cmake 3.19.2 or newer is recommended but I don't have the source at hand.

[Lemat]

@SGaist

Can you explain more ?

[SGaist]

You should update your cmake version.

[Lemat]

@SGaist

Okay. let me try. i am downloading cmake 3.19.3

[Lemat]

i tried with cmake 3.19.3, problem still exist

[SGaist]

Did you restart from a clean state ?

[Lemat]

@SGaist yes. i did it. but the problem still exist

[SGaist]

What did you do to ensure a clean state ?