seh | Space Exploration History | Data Visualization library

Depending on the version of your compiler, different standards are the default. For 11.2 it is C++ 17 AFAIK.
Cou can just add a flag and it compiles:

g++ --std=c++20 main.cc

Well, it seems I have a lot to learn about command line compiling/linking.

I fixed it by adding -lgdi32 to the compile tags:

clang++ -Iinclude\ -Llib\ -lglfw3 -lgdi32 -v .\main.cpp

Got the idea from this thread: https://github.com/ziglang/zig/issues/3319 From the thread, near the bottom, there is some good advice:

When you see undefined symbol: __imp_CreateDCW the trick is to look up what DLL that is in. A duck duck go search lands us at https://docs.microsoft.com/en-us/windows/win32/api/wingdi/nf-wingdi-createdcw which says at the bottom it is in Gdi32.dll. So you need addSystemLibrary("Gdi32").

For some reason I assumed all the undefined function calls were from glfw, but they aren't, they are from the GDI32 Win32 library.

Just goes to show, for anyone at my experience level, you should probably make sure to google ALL relevant text from your errors and don't make assumptions about the provenance of things..

What am I missing ?

In order to use C++20 features, you need to select the C++20 standard version.

This is something that seem to have changed between pgAdmin4 5.1 and 5.7. I've seen this on a machine that had been connected to a WiFi mobile hotspot (but it could happen in other circumstances).

It has something to do with the way the dns library is used on Windows, so this could happen to other applications that use it in the same way.

Essentially, dns.Resolver scans the Windows registry for all network interfaces found under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\

The WiFi mobile hotspot that machine had been connected to had set a DhcpDomain key with value ".home". The dns.Resolver found this value and split it using the dot into multiple labels, one of them being empty. That caused the exception you mention: dns.name.EmptyLabel: A DNS label is empty.

This occurred even when the WiFi network was turned off: those were the last settings that had been in use and dns.Resolver didn't check whether the interface was enabled.

The latest version of pgAdmin seems to be an older version of dnspython (1.16.0), so I'm not sure whether this has been fixed in more recent versions. For now, there seems to be two options:

• Delete or change the DhcpDomain subkey if you find it in on of the subkeys of HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\ (there might even be a way to force that value through the Control Panel).

• Connect to a different network that doesn't set this value.

I do not know exactly how to use StopWordsRemover, but based on what you did and on the documentation, I can offer this solution (without UDFs):

This is not going to be a proper answer, but at least I can describe the end-to-end mechanism that's causing the problem. I'm not familiar enough with all the intricacies of MingW, winpthread, etc... to really say exactly who's doing something wrong, but I'll leave it to the experts ;-)

So it all starts with SystemC's configure which generates Makefiles recipes defining DLL_EXPORT. At first sight it seems quite legitimate to define DLL_EXPORT, since the goal is to build a library.

In practice though, DLL_EXPORT isn't referenced anywhere in SystemC's code so it's not very clear what the intention is (and as a matter of fact, SystemC's cmake-based flow doesn't define it). If I trust comments in configure though, it is some kind of hack that has a good reason to be.

Next, as SystemC source files get compiled, mingw-w64-libraries/winpthreads/include/pthread.h is included at some point (via sc_host_mutex.h and ).

At this point the compiler sees the below:

The problem turned out to be lack of linker information. It was hard to find info specific to using GCC with VSCode on Windows to embed Lua in C, and for a while I wasn't sure where those commands were supposed to go. Having tasks.json automatically created by the debugger didn't include this info. I had to type in "-LC:/MyLibs/lua5.1",, "-IC:/MyLibs/lua5.1/include",, and "-llua5.1", within the brackets of the "args" section. This is what the file looks like now (I've moved minGW and MyLibs outside of "Program Files" since first posting to see if the spaces in the folder name were making GCC/GDB act up):

I think this is a limitation of default context, which does not do everything that Windows does, which is not likely to be fixed for you. If you want full support of Windows stuff, you probably should switch to Windows Fibers. Looks like Boost Context supports them.

The drawback of using Windows Fiber could be worse performance.

If this matters for you, you probably have to use fast context, and have your own SEH frame:

Am I doing something wrong ? Is there a way to fix this ?

Yes. %s is for printing char*. To print wchar_t*, use %ls.