[compat] Windows 8.1 support (#2772)

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2772
Reviewed-by: Caio Oliveira <caiooliveirafarias0@gmail.com>
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

docs/Caveats.md

@@ -11,6 +11,7 @@
   - [FreeBSD](#freebsd)
   - [NetBSD](#netbsd)
   - [MSYS2](#msys2)
+  - [Windows 8.1 and below](#windows-81-and-below)
 <!-- /TOC -->
 
 ## Arch Linux
@@ -161,4 +162,10 @@ windeployqt6 --no-compiler-runtime --no-opengl-sw --no-system-dxc-compiler \
 
 # grab deps for Qt plugins
 find ./*/ -name "*.dll" | while read -r dll; do deps "$dll"; done
-```
+```
+
+## Windows 8.1 and below
+
+DirectX 12 is not available - simply copy and paste a random DLL and name it `d3d12.dll`.
+
+Install [Qt6 compatibility libraries](github.com/ANightly/qt6windows7) specifically Qt 6.9.5.

src/common/thread.cpp

@@ -81,7 +81,10 @@ void SetCurrentThreadPriority(ThreadPriority new_priority) {
 
 // Sets the debugger-visible name of the current thread.
 void SetCurrentThreadName(const char* name) {
-    SetThreadDescription(GetCurrentThread(), UTF8ToUTF16W(name).data());
+    if (auto pf = (decltype(&SetThreadDescription))(void*)GetProcAddress(GetModuleHandle(TEXT("KernelBase.dll")), "SetThreadDescription"); pf)
+        pf(GetCurrentThread(), UTF8ToUTF16W(name).data()); // Windows 10+
+    else
+        ; // No-op
 }
 
 #else // !MSVC_VER, so must be POSIX threads