mirror of
https://github.com/Ryujinx/SDL.git
synced 2024-12-23 07:35:38 +00:00
164 lines
6 KiB
Markdown
164 lines
6 KiB
Markdown
# CMake
|
|
|
|
(www.cmake.org)
|
|
|
|
SDL's build system was traditionally based on autotools. Over time, this
|
|
approach has suffered from several issues across the different supported
|
|
platforms.
|
|
To solve these problems, a new build system based on CMake was introduced.
|
|
It is developed in parallel to the legacy autotools build system, so users
|
|
can experiment with it without complication.
|
|
|
|
The CMake build system is supported on the following platforms:
|
|
|
|
* FreeBSD
|
|
* Linux
|
|
* Microsoft Visual C
|
|
* MinGW and Msys
|
|
* macOS, iOS, and tvOS, with support for XCode
|
|
* Android
|
|
* Emscripten
|
|
* RiscOS
|
|
* Playstation Vita
|
|
|
|
## Building SDL
|
|
|
|
Assuming the source for SDL is located at `~/sdl`
|
|
```sh
|
|
cd ~
|
|
mkdir build
|
|
cd build
|
|
cmake ~/sdl
|
|
cmake --build .
|
|
```
|
|
|
|
This will build the static and dynamic versions of SDL in the `~/build` directory.
|
|
Installation can be done using:
|
|
|
|
```sh
|
|
cmake --install . # '--install' requires CMake 3.15, or newer
|
|
```
|
|
|
|
## Including SDL in your project
|
|
|
|
SDL can be included in your project in 2 major ways:
|
|
- using a system SDL library, provided by your (*nix) distribution or a package manager
|
|
- using a vendored SDL library: this is SDL copied or symlinked in a subfolder.
|
|
|
|
The following CMake script supports both, depending on the value of `MYGAME_VENDORED`.
|
|
|
|
```cmake
|
|
cmake_minimum_required(VERSION 3.5)
|
|
project(mygame)
|
|
|
|
# Create an option to switch between a system sdl library and a vendored sdl library
|
|
option(MYGAME_VENDORED "Use vendored libraries" OFF)
|
|
|
|
if(MYGAME_VENDORED)
|
|
add_subdirectory(vendored/sdl EXCLUDE_FROM_ALL)
|
|
else()
|
|
# 1. Look for a SDL2 package, 2. look for the SDL2 component and 3. fail if none can be found
|
|
find_package(SDL2 REQUIRED CONFIG REQUIRED COMPONENTS SDL2)
|
|
|
|
# 1. Look for a SDL2 package, 2. Look for the SDL2maincomponent and 3. DO NOT fail when SDL2main is not available
|
|
find_package(SDL2 REQUIRED CONFIG COMPONENTS SDL2main)
|
|
endif()
|
|
|
|
# Create your game executable target as usual
|
|
add_executable(mygame WIN32 mygame.c)
|
|
|
|
# SDL2::SDL2main may or may not be available. It is e.g. required by Windows GUI applications
|
|
if(TARGET SDL2::SDL2main)
|
|
# It has an implicit dependency on SDL2 functions, so it MUST be added before SDL2::SDL2 (or SDL2::SDL2-static)
|
|
target_link_libraries(mygame PRIVATE SDL2::SDL2main)
|
|
endif()
|
|
|
|
# Link to the actual SDL2 library. SDL2::SDL2 is the shared SDL library, SDL2::SDL2-static is the static SDL libarary.
|
|
target_link_libraries(mygame PRIVATE SDL2::SDL2)
|
|
```
|
|
|
|
### A system SDL library
|
|
|
|
For CMake to find SDL, it must be installed in [a default location CMake is looking for](https://cmake.org/cmake/help/latest/command/find_package.html#config-mode-search-procedure).
|
|
|
|
The following components are available, to be used as an argument of `find_package`.
|
|
|
|
| Component name | Description |
|
|
|----------------|--------------------------------------------------------------------------------------------|
|
|
| SDL2 | The SDL2 shared library, available through the `SDL2::SDL2` target [^SDL_TARGET_EXCEPTION] |
|
|
| SDL2-static | The SDL2 static library, available through the `SDL2::SDL2-static` target |
|
|
| SDL2main | The SDL2main static library, available through the `SDL2::SDL2main` target |
|
|
| SDL2test | The SDL2test static library, available through the `SDL2::SDL2test` target |
|
|
|
|
### Using a vendored SDL
|
|
|
|
This only requires a copy of SDL in a subdirectory.
|
|
|
|
## CMake configuration options for platforms
|
|
|
|
### iOS/tvOS
|
|
|
|
CMake 3.14+ natively includes support for iOS and tvOS. SDL binaries may be built
|
|
using Xcode or Make, possibly among other build-systems.
|
|
|
|
When using a recent version of CMake (3.14+), it should be possible to:
|
|
|
|
- build SDL for iOS, both static and dynamic
|
|
- build SDL test apps (as iOS/tvOS .app bundles)
|
|
- generate a working SDL_config.h for iOS (using SDL_config.h.cmake as a basis)
|
|
|
|
To use, set the following CMake variables when running CMake's configuration stage:
|
|
|
|
- `CMAKE_SYSTEM_NAME=<OS>` (either `iOS` or `tvOS`)
|
|
- `CMAKE_OSX_SYSROOT=<SDK>` (examples: `iphoneos`, `iphonesimulator`, `iphoneos12.4`, `/full/path/to/iPhoneOS.sdk`,
|
|
`appletvos`, `appletvsimulator`, `appletvos12.4`, `/full/path/to/AppleTVOS.sdk`, etc.)
|
|
- `CMAKE_OSX_ARCHITECTURES=<semicolon-separated list of CPU architectures>` (example: "arm64;armv7s;x86_64")
|
|
|
|
|
|
#### Examples
|
|
|
|
- for iOS-Simulator, using the latest, installed SDK:
|
|
|
|
```bash
|
|
cmake ~/sdl -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_SYSROOT=iphonesimulator -DCMAKE_OSX_ARCHITECTURES=x86_64
|
|
```
|
|
|
|
- for iOS-Device, using the latest, installed SDK, 64-bit only
|
|
|
|
```bash
|
|
cmake ~/sdl -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_SYSROOT=iphoneos -DCMAKE_OSX_ARCHITECTURES=arm64
|
|
```
|
|
|
|
- for iOS-Device, using the latest, installed SDK, mixed 32/64 bit
|
|
|
|
```cmake
|
|
cmake ~/sdl -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_SYSROOT=iphoneos -DCMAKE_OSX_ARCHITECTURES="arm64;armv7s"
|
|
```
|
|
|
|
- for iOS-Device, using a specific SDK revision (iOS 12.4, in this example):
|
|
|
|
```cmake
|
|
cmake ~/sdl -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_SYSROOT=iphoneos12.4 -DCMAKE_OSX_ARCHITECTURES=arm64
|
|
```
|
|
|
|
- for iOS-Simulator, using the latest, installed SDK, and building SDL test apps (as .app bundles):
|
|
|
|
```cmake
|
|
cmake ~/sdl -DSDL_TESTS=1 -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_SYSROOT=iphonesimulator -DCMAKE_OSX_ARCHITECTURES=x86_64
|
|
```
|
|
|
|
- for tvOS-Simulator, using the latest, installed SDK:
|
|
|
|
```cmake
|
|
cmake ~/sdl -DCMAKE_SYSTEM_NAME=tvOS -DCMAKE_OSX_SYSROOT=appletvsimulator -DCMAKE_OSX_ARCHITECTURES=x86_64
|
|
```
|
|
|
|
- for tvOS-Device, using the latest, installed SDK:
|
|
|
|
```cmake
|
|
cmake ~/sdl -DCMAKE_SYSTEM_NAME=tvOS -DCMAKE_OSX_SYSROOT=appletvos -DCMAKE_OSX_ARCHITECTURES=arm64`
|
|
```
|
|
|
|
|
|
[^SDL_TARGET_EXCEPTION]: `SDL2::SDL2` can be an ALIAS to a static `SDL2::SDL2-static` target for multiple reasons.
|