Merge commit '8821e99ab51434f24f3e64dd7ec4cfeeb761a018' as 'external/SDL'

external/SDL/INSTALL.md

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+# To compile and install SDL:
+
+##  Windows with Visual Studio:
+
+Read ./docs/README-visualc.md
+
+## Windows building with mingw-w64 for x86:
+
+Run: `cmake -S . -B build -DCMAKE_TOOLCHAIN_FILE=build-scripts/cmake-toolchain-mingw64-i686.cmake && cmake --build build && cmake --install build`
+
+## Windows building with mingw-w64 for x64:
+
+Run: `cmake -S . -B build -DCMAKE_TOOLCHAIN_FILE=build-scripts/cmake-toolchain-mingw64-x86_64.cmake && cmake --build build && cmake --install build`
+
+## macOS with Xcode:
+
+Read docs/README-macos.md
+
+## macOS from the command line:
+
+Run: `cmake -S . -B build && cmake --build build && cmake --install build`
+
+### macOS for universal architecture:
+
+Run: `cmake -S . -B build -DCMAKE_OSX_ARCHITECTURES="x86_64;arm64" && cmake --build build && cmake --install build`
+
+## Linux and other UNIX systems:
+
+Run: `cmake -S . -B build && cmake --build build && cmake --install build`
+
+## Android:
+
+Read docs/README-android.md
+
+## iOS:
+
+Read docs/README-ios.md
+
+## Using CMake:
+
+Read docs/README-cmake.md
+
+# Example code
+
+Look at the example programs in ./test, and check out the online
+documentation at https://wiki.libsdl.org/SDL3/
+
+# Discussion
+
+## Forums/mailing lists
+
+Join the SDL developer discussions, sign up on
+
+https://discourse.libsdl.org/
+
+and go to the development forum
+
+https://discourse.libsdl.org/c/sdl-development/6
+
+Once you sign up, you can use the forum through the website, or as a mailing
+list from your email client.
+
+## Announcement list
+
+Sign up for the announcement list through the web interface:
+
+https://www.libsdl.org/mailing-list.php
+