How to Compile a C Program with SDL2 and SDL_image Using CMake?

How to Use SDL2 and SDL_image with CMake

To compile a C program using SDL2 and SDL_image with CMake, you can use the following steps:

1. Create a CMakeLists.txt file in your project directory. This file will define the project settings and build instructions.
2. Set the project name and minimum required CMake version. For example:

<code class="cmake">project(shooter-cmake2)
cmake_minimum_required(VERSION 2.8)</code>

3. Specify the source files to be included in the project. For example:

<code class="cmake">set(SOURCES
shooter.cpp
classes.cpp
utils.cpp
)</code>

4. Set the C compiler flags. For example, to use the C 0x standard:

<code class="cmake">set(CMAKE_CXX_FLAGS "std=c++0x")</code>

5. Add the executable target. This will define the executables to be built from the source files. For example:

<code class="cmake">add_executable(${PROJECT_NAME} ${SOURCES})</code>

6. Use FindPkgConfig to find the SDL2 and SDL_image libraries. This module simplifies the process of locating libraries installed on the system. For example:

<code class="cmake">INCLUDE(FindPkgConfig)
PKG_SEARCH_MODULE(SDL2 REQUIRED sdl2)</code>

7. Include the library directories and link the libraries. This ensures that the linker can find the necessary shared object files. For example:

<code class="cmake">INCLUDE_DIRECTORIES(${SDL2_INCLUDE_DIRS} ${SDL2IMAGE_INCLUDE_DIR})
TARGET_LINK_LIBRARIES(${PROJECT_NAME} ${SDL2_LIBRARIES} ${SDL2IMAGE_LIBRARY})</code>

Troubleshooting

If you encounter errors such as "undefined reference to IMG_LoadTexture," ensure that the required header files are included and the library is linked correctly. Verify that you have installed and configured SDL2 and SDL_image on your system. Additionally, consider checking the pkg-config files to confirm that the library names match the parameters specified in PKG_SEARCH_MODULE.

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