POCO master
Windows 10
Visual Studio 2022, 17.2.6, CMake, toolset clang_cl_x64_x64 failed with output:

[430/631] Building CXX object Net\CMakeFiles\Net.dir\src\PollSet.cpp.obj
FAILED: Net/CMakeFiles/Net.dir/src/PollSet.cpp.obj
C:\PROGRA1\MICROS4\2022\COMMUN~1\VC\Tools\Llvm\x64\bin\clang-cl.exe /nologo -TP -DNet_EXPORTS -DPOCO_ENABLE_CPP11 -DPOCO_ENABLE_CPP14 -DPOCO_NO_AUTOMATIC_LIBS -DPOCO_OS_FAMILY_WINDOWS -DUNICODE -D_DEBUG -D_UNICODE -IC:\Users\shaki\source\github\poco\Net\include -IC:\Users\shaki\source\github\poco\Net\src -IC:\Users\shaki\source\github\poco\Foundation\include -m64 -fdiagnostics-absolute-paths /DWIN32 /D_WINDOWS /W3 /GR /EHsc /Zc:__cplusplus /MDd /Zi /Ob0 /Od /RTC1 -std:c++14 /showIncludes /FoNet\CMakeFiles\Net.dir\src\PollSet.cpp.obj /FdNet\CMakeFiles\Net.dir\ -c -- C:\Users\shaki\source\github\poco\Net\src\PollSet.cpp
C:\Users\shaki\source\github\poco\Net\src\PollSet.cpp(76,26): error : ordered comparison between pointer and zero ('void *' and 'int')
if ((err) || (_epollfd < 0))
~~~~~~~~ ^ ~
C:\Users\shaki\source\github\poco\Net\src\PollSet.cpp(89,16): error : ordered comparison between pointer and zero ('void *' and 'int')
if (_epollfd >= 0) close(_epollfd);
~~~~~~~~ ^ ~
C:\Users\shaki\source\github\poco\Net\src\PollSet.cpp(144,17): error : ordered comparison between pointer and zero ('void *' and 'int')
if (_epollfd < 0) SocketImpl::error();
~~~~~~~~ ^ ~
3 errors generated.