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How to Integrate SDL2 and SDL_image with CMake
Introduction
When developing C programs that utilize SDL2 and SDL_image libraries, using CMake for compilation simplifies the process. However, beginners may encounter challenges in setting up the build system correctly. This article will address common pitfalls experienced when integrating SDL2 and SDL_image with CMake.
Configuring CMake
To configure CMake effectively, follow these steps:
<code class="cmake">project(shooter-cmake2) cmake_minimum_required(VERSION 2.8) set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x") add_executable(${PROJECT_NAME} src/test.cpp) INCLUDE(FindPkgConfig) PKG_SEARCH_MODULE(SDL2 REQUIRED sdl2) PKG_SEARCH_MODULE(SDL2IMAGE REQUIRED SDL2_image>=2.0.0) INCLUDE_DIRECTORIES(${SDL2_INCLUDE_DIRS} ${SDL2IMAGE_INCLUDE_DIRS}) TARGET_LINK_LIBRARIES(${PROJECT_NAME} ${SDL2_LIBRARIES} ${SDL2IMAGE_LIBRARIES})</code>
Errors
If you encounter errors related to missing functions like IMG_LoadTexture, double-check the following:
Linking Functions
To utilize functions from SDL2 or SDL_image, include the appropriate header files and ensure that the libraries are linked to your executable. For example:
<code class="c++">#include "SDL.h" #include "SDL_image.h" SDL_Texture* loadTexture(const std::string &file, SDL_Renderer *ren) { SDL_Texture *texture = IMG_LoadTexture(ren, file.c_str()); texture != nullptr or die("LoadTexture"); return texture; }</code>
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