- Set a different output name for static libraries on MSVC and WATCOM (cf. libsdl-org/SDL_image#275 and libsdl-org/SDL#5727)
- Fix `PKG_PREFIX` on Windows (cf. libsdl-org/SDL_image#274)

Co-authored-by: Anonymous Maarten <madebr@users.noreply.github.com>

#48

* Add CMake support.

Implementation is based off SDL2_Image.

* Add CMake tests to test-versioning.sh.

* Add CMake workflow

Changes link flags to fix mingw builds.

`showinterfaces` is disabled on MSVC workflow as the minimum version of SDL is too old for current MSVCRT and gives linker errors even when linking `legacy_stdio_definitions.lib`

* Apply suggestion from review

Only set `Compatible Interface Properties` for shared libraries.

Co-authored-by: Anonymous Maarten <madebr@users.noreply.github.com>

* CMake: Define SDL_MAIN_HANDLED for showinterfaces.

This removes the need for SDL2main as it is a console-only application.
MSVC workflow now builds showinterfaces.

* Apply suggestion from review.

The `mingw32` library is no longer needed as `showinterfaces` is a console app.

Co-authored-by: Anonymous Maarten <madebr@users.noreply.github.com>

* CMake: Update MSVC compiler flags.

Applied review suggestion to use `target_compile_options`.
Replaced `/wd4996` as `_WINSOCK_DEPRECATED_NO_WARNINGS` is enough.
Raise the warning level to `/W3` to be consistent with the solution in
`VisualC/`.

* Apply suggestions from code review.

- Set a different output name for static libraries on MSVC and WATCOM (cf. libsdl-org/SDL_image#275 and libsdl-org/SDL#5727)
- Fix `PKG_PREFIX` on Windows (cf. libsdl-org/SDL_image#274)

Co-authored-by: Anonymous Maarten <madebr@users.noreply.github.com>

* CMake: Fix missing parenthesis.

* CMake: Remove dead code.

SDL_net does not build any dependency, so we don't need to force
position independent code.

* CMake: Add config files for XCode Frameworks

* CMake: Generate cmake config when using autotools.

* CMake: Add config files for mingw devel archive.

* CMake: Add config files for VC devel archive.

* Regenerate autotools file with CMake support.

* autogen.sh + cmake integration test

* Don't force an installed SDL2_net::SDL2_net-static to link with a specific SDL2 sharedness library

* Update PrivateSdlFunctions.cmake

* Apply suggestion from review.

Fix option de-duplication issues when linking with SDL2 framework.

Co-authored-by: Anonymous Maarten <madebr@users.noreply.github.com>

* CMake: Escape framework parent path.

This is necessary if the framework has a space in its path.

* Apply suggestion from review.

Fix name mismatch between the bundled CMake config file for mingw and the generated config.

Co-authored-by: Anonymous Maarten <madebr@users.noreply.github.com>

* Apply suggestion from review.

Fix regex match.

Co-authored-by: Anonymous Maarten <madebr@users.noreply.github.com>

* Apply suggestion from review.

No longer set PKG_PREFIX on macOS.

Co-authored-by: Anonymous Maarten <madebr@users.noreply.github.com>

Co-authored-by: Anonymous Maarten <madebr@users.noreply.github.com>
Co-authored-by: Anonymous Maarten <anonymous.maarten@gmail.com>