How to Solve SDL2 Header Location Issues in CLion Using CMake?

Integrating SDL2 with CMake

Problem:
Users attempting to create an SDL2 project in CLion encounter issues locating SDL headers while using #include directives.

Problem Analysis:
The error suggests that CMake is unable to locate the SDL2 headers used in the main.cpp file. The provided CMakeLists.txt indicates that the SDL2 headers and libraries are defined in specific paths.

Solution:
Linux:

• Ensure you are using a recent CMake version (e.g., 3.7).
• Include the following in your CMakeLists.txt:

<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:

• Follow these instructions outlined in this blog post: Using SDL2 with CMake
• Download the SDL2 development package and extract it.
• Create a sdl-config.cmake file in the extracted location 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>

• In the CMake-GUI application, configure and point the SDL2_DIR variable to the SDL2 directory.
• After reconfiguring, the SDL2 headers can be included using #include "SDL.h".

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