Determining if the include file pthread.h exists failed with the following output:
Change Dir: D:/qt/qt-creator/qt-creator_build/CMakeFiles/CMakeTmp

Run Build Command(s):D:/dep/ninja-win/ninja.exe cmTC_a84f6 && [1/2] Building C object CMakeFiles\cmTC_a84f6.dir\CheckIncludeFile.c.obj

FAILED: CMakeFiles/cmTC_a84f6.dir/CheckIncludeFile.c.obj 

"D:\Programme\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.30.30705\bin\Hostx64\x64\cl.exe"  /nologo   /DWIN32 /D_WINDOWS /W3  /MDd /Zi /Ob0 /Od /RTC1 /showIncludes /FoCMakeFiles\cmTC_a84f6.dir\CheckIncludeFile.c.obj /FdCMakeFiles\cmTC_a84f6.dir\ /FS -c D:\qt\qt-creator\qt-creator_build\CMakeFiles\CMakeTmp\CheckIncludeFile.c

D:\qt\qt-creator\qt-creator_build\CMakeFiles\CMakeTmp\CheckIncludeFile.c(1): fatal error C1083: Cannot open include file: 'pthread.h': No such file or directory
ninja: build stopped: subcommand failed.