How can I include SDL2 headers in a CMake-based project?

Including SDL2 Headers in CMake-Based Projects

This question tackles the issue of including SDL2 headers (#include "SDL.h") when creating a SDL2 project in CLion using CMake.

Solution

The provided solution offers two approaches for different operating systems:

Linux

For Linux, using a recent CMake version (e.g., 3.7) is sufficient. CMake's built-in find_package feature can locate and include SDL2 headers and libraries:

<code class="cmake">cmake_minimum_required(VERSION 3.7)
project(SDL2Test)

find_package(SDL2 REQUIRED)
include_directories(SDL2Test ${SDL2_INCLUDE_DIRS})

add_executable(SDL2Test Main.cpp)
target_link_libraries(SDL2Test ${SDL2_LIBRARIES})</code>

Windows

For Windows, follow these steps:

1. Download the SDL2 development package.
2. Extract it to a chosen location.
3. Create the file sdl-config.cmake in the extracted directory with the following content:

<code class="cmake">set(SDL2_INCLUDE_DIRS "${CMAKE_CURRENT_LIST_DIR}/include")

# Support both 32 and 64 bit builds
if (${CMAKE_SIZEOF_VOID_P} MATCHES 8)
  set(SDL2_LIBRARIES "${CMAKE_CURRENT_LIST_DIR}/lib/x64/SDL2.lib;${CMAKE_CURRENT_LIST_DIR}/lib/x64/SDL2main.lib")
else ()
  set(SDL2_LIBRARIES "${CMAKE_CURRENT_LIST_DIR}/lib/x86/SDL2.lib;${CMAKE_CURRENT_LIST_DIR}/lib/x86/SDL2main.lib")
endif ()

string(STRIP "${SDL2_LIBRARIES}" SDL2_LIBRARIES)</code>

4. In the CMake-GUI application, set the SDL2_DIR variable to the extracted SDL2 directory.
5. Reconfigure CMake.

After these steps, you can include SDL2 headers using #include "SDL.h".

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