Switch build system to CMake

This unifies the build system across platforms, including doing
development inside Visual Studio. No change to other code.

Some exceptions:
 - Switch port is still a Makefile
 - run_with_tcc.bat still exists

.gitignore

@@ -1,12 +1,7 @@
 .DS_Store
 *.dSYM
 /.vs/
-/packages/
 /saves/
-*.o
-/sm
-/build/
+/build*/
 /sm.smc
-SDL2.dll
-/sm.exe
-/glsl-shaders/
+/glsl-shaders/

BUILDING.md

@@ -1,55 +1,41 @@
 # Requirements
-  * A Super Metroid rom (Make sure to rename it to `sm.smc`)
+  * cmake (and also ninja, for better compiling speed)
+  * A Super Metroid rom (Make sure to rename it to `sm.smc`) which **must be in
+    the same folder as `sm`/`sm.exe`**
   * libsdl2-dev
   * Super Metroid repo `git clone --recursive https://github.com/snesrev/sm`
 
  For Linux/MacOS you must install these for your desired OS:
- * Ubuntu/Debian: `sudo apt install libsdl2-dev`
- * Fedora Linux: `sudo dnf in sdl2-devel`
- * Arch Linux: `sudo pacman -S sdl2`
- * macOS: `brew install sdl2`
+ * Ubuntu/Debian: `sudo apt install libsdl2-dev cmake ninja-build`
+ * Fedora Linux: `sudo dnf in sdl2-devel cmake ninja-build`
+ * Arch Linux: `sudo pacman -S sdl2 cmake ninja`
+ * macOS: `brew install sdl2 cmake ninja`
 
 # Windows
 
 ## Building with MSYS2
-
-Dependencies and requirements:
-
-  * The `libsdl2-dev` library
-  * [MSYS2](https://www.msys2.org)
+First, install [MSYS2](https://www.msys2.org/). After following the instructions,
+install the following packages.
 
 Note: *Make sure you're using MINGW64 and you're in `sm` folder in the terminal.*
 
-1. Install MSYS2 on your machine.
-2. Place the copy of your rom in the main directory.
-3. Install the necessary dependencies by inputting this command in the terminal.
-
-```sh
-pacman -S mingw-w64-x86_64-SDL2 && pacman -S make && pacman -S mingw-w64-x86_64-gcc
-```
-4. Type `sdl2-config --cflags`, it should output:
-```sh
--IC:/msys64/mingw64/include/SDL2 -Dmain=SDL_main
-```
-5. After that type `sdl2-config --libs`, should output:
 ```sh
--LC:/msys64/mingw64/lib -lmingw32 -mwindows -lSDL2main -lSDL2
+pacman -S mingw-w64-x86_64-{gcc,cmake,SDL2,ninja}
 ```
 
-After you've done installing everything, cd to `sm` folder. Type `make`
-In order to speed up the compilation, type `make -j16`
-
 ## Building with Visual Studio
 
 Dependencies and requirements:
  * The `libsdl2-dev` library, which is automatically installed with NuGet.
  * [Visual Studio Community 2022](https://visualstudio.microsoft.com)
 
-Download VS installer. On installer prompt, make sure you're on "Workloads" and check `Desktop Development with C++` this will install the necessary deps for compilation.
+Download VS installer. On installer prompt, make sure you're on "Workloads" 
+and check **both** `Desktop Development with C++` **and** `C++ CMake Tools for Windows`.
+This will install the necessary deps for compilation.
 
-1. Open `sm.sln` solution.
-2. Change the build target from `Debug` to `Release`
-3. Build the solution.
+Visual Studio should automatically detect the CMake project and let you configure and build it. If not,
+follow the [general instructions](https://learn.microsoft.com/en-us/cpp/build/cmake-projects-in-visual-studio?view=msvc-170)
+from Microsoft.
 
 ## Building with Tiny C Compiler
 
@@ -64,34 +50,34 @@ Download VS installer. On installer prompt, make sure you're on "Workloads" and
 
 CD to your SM root folder and open the terminal and type:
 ```sh
-make
+cmake -B build && cmake --build build --parallel
 ```
 
-For more advanced usage:
-```sh
-make -j$(nproc) # run on all core
-make clean all  # clear gen+obj and rebuild
-CC=clang make   # specify compiler
-```
+The resulting binary will be `build/sm`.
 
 # Nintendo Switch
 
-Dependencies and requirements:
+## Getting Dependencies
 
-  * The `switch-sdl2` library
+You will need:
   * [DevKitPro](https://github.com/devkitPro/installer)
   * [Atmosphere](https://github.com/Atmosphere-NX/Atmosphere)
 
-1. Make sure you've installed Atmosphere on your Switch.
-2. Please download the DevKitPro version of MSYS2 through their installer, as the default MSYS2 causes issues with windows compiling.
-3. Now that you've installed DevKitPro, open up the location you've installed DevKitPro to, then find `mingw64.exe` inside `msys2` located in `devkitPro` folder.
-4. Type `pacman -S git switch-dev switch-sdl2 switch-tools` in the terminal to install the `switch-sdl2` library.
-5. CD to `switch` folder by typing `cd src/platfrom/switch` in the terminal on the `sm` root folder.
-6. type `make` to compile the Switch Port.
-7. Transfer the `.ini`, `nro`, `ncap` and your rom file to the Switch.
+First, follow the [installation instructions on devkitPro's website](https://devkitpro.org/wiki/Getting_Started).
 
-**OPTIONAL STEP**
+Second, once you have pacman set up and synced, do:
+```shell
+pacman -S switch-dev switch-tools switch-sdl2
+```
 
-```sh
-make -j$(nproc) # To build using all cores
+## Building
+In the top level directory, you can use the cmake preset for running a build for the switch:
+```shell
+cmake --preset nintendo-switch
+cmake --build build-switch --parallel
 ```
+
+## Getting SM on to your Switch
+First, make sure you've installed [Atmosphere](https://github.com/Atmosphere-NX/Atmosphere) on your Switch.
+Next, go into the `build-switch` directory and copy `sm.ini`, `sm.nro`, and `sm.ncap` and the sm rom
+file to your Switch.

CMakeLists.txt

@@ -0,0 +1,84 @@
+cmake_minimum_required(VERSION 3.22 FATAL_ERROR)
+
+project(sm
+        VERSION 0.0.1
+        DESCRIPTION "Super Metroid PC Port"
+        HOMEPAGE_URL "https://github.com/snesrev/sm"
+        LANGUAGES C)
+
+if (CMAKE_BINARY_DIR EQUAL CMAKE_SOURCE_DIR)
+    message(WARNING "You are compiling in the source tree, you probably don't want to do that. Use -B to set the build directory")
+endif()
+
+include(GNUInstallDirs)
+
+# Compiler Warnings
+list(APPEND c_warnings
+            "-Wall"
+            "-fno-strict-aliasing")
+
+list(APPEND msvc_warnings
+            "/W3"
+            "/wd4996")
+
+# For installation later
+set(ini_name "${PROJECT_SOURCE_DIR}/sm.ini")
+
+# Dependencies
+# ------------
+# SDL
+if (NINTENDO_SWITCH)
+    # Force static on Switch, just because it's easier
+    find_package(SDL2 REQUIRED COMPONENTS SDL2-static)
+else()
+    find_package(SDL2 REQUIRED COMPONENTS SDL2)
+endif()
+
+# OpenGL
+# TODO: This should likely be removed
+add_library(gl STATIC "third_party/gl_core/gl_core_3_1.c")
+target_include_directories(gl PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}")
+
+# Main Executable
+# ---------------
+add_executable(sm)
+add_subdirectory(src)
+target_link_libraries(sm PRIVATE SDL2::SDL2 gl)
+set_target_properties(sm PROPERTIES C_STANDARD 11)
+
+if (MSVC)
+    target_compile_options(sm PRIVATE ${msvc_warnings})
+else()
+    target_link_libraries(sm PRIVATE m)
+    target_compile_definitions(sm PRIVATE SYSTEM_VOLUME_MIXER_AVAILABLE=0)
+    target_compile_options(sm PRIVATE ${c_warnings})
+endif()
+
+# Nintendo Switch extra setup
+if (NINTENDO_SWITCH)
+    target_compile_definitions(sm PUBLIC __SWITCH__)
+
+    # needs to be linked with g++ for C++ stdlib
+    enable_language(CXX)
+    set_target_properties(sm PROPERTIES
+                          CXX_STANDARD 11
+                          LINKER_LANGUAGE CXX)
+
+    nx_generate_nacp(sm.nacp
+                     NAME "Super Metroid"
+                     AUTHOR "snesrev & Lywx"
+                     VERSION "${PROJECT_VERSION}")
+
+    nx_create_nro(sm
+                  NACP sm.nacp
+                  ICON "${PROJECT_SOURCE_DIR}/src/platform/switch/icon.jpg")
+
+    set(ini_name "${PROJECT_SOURCE_DIR}/src/platform/switch/sm.ini")
+endif()
+
+# Installation
+# ------------
+install(TARGETS sm RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
+
+# TODO: should be in some config dir
+install(FILES "${ini_name}" DESTINATION "${CMAKE_INSTALL_BINDIR}")

CMakePresets.json

@@ -0,0 +1,20 @@
+{
+    "version": 3,
+    "cmakeMinimumRequired": {
+      "major": 3,
+      "minor": 21,
+      "patch": 0
+    },
+    "configurePresets": [
+        {
+          "name": "nintendo-switch",
+          "binaryDir": "${sourceDir}/build-switch",
+          "toolchainFile": "$env{DEVKITPRO}/cmake/Switch.cmake",
+          "condition": {
+            "type": "notEquals",
+            "lhs": "$env{DEVKITPRO}",
+            "rhs": ""
+          }
+        }
+    ]
+}