SDL: README-windows: Notes on building with Visual Studio/LLVM.

From 94ed6b0a54d127cd8caf0f1841c694093e4c0628 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Sat, 26 Mar 2022 08:55:26 -0400
Subject: [PATCH] README-windows: Notes on building with Visual Studio/LLVM.

Fixes #5186.
---
 docs/README-windows.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/docs/README-windows.md b/docs/README-windows.md
index 4287491da70..ed0c93e2c7f 100644
--- a/docs/README-windows.md
+++ b/docs/README-windows.md
@@ -1,5 +1,16 @@
 # Windows
 
+## LLVM and Intel C++ compiler support
+
+SDL will build with the Visual Studio project files with LLVM-based compilers, such as the Intel oneAPI C++
+compiler, but you'll have to manually add the "-msse3" command line option
+to at least the SDL_audiocvt.c source file, and possibly others. This may
+not be necessary if you build SDL with CMake instead of the included Visual
+Studio solution.
+
+Details are here: https://github.com/libsdl-org/SDL/issues/5186
+
+
 ## OpenGL ES 2.x support
 
 SDL has support for OpenGL ES 2.x under Windows via two alternative