CODEWITHSUNDEEP
c++cmakesdl-2
Lurgypai
Lurgypai

Reputation: 71

Using CMAKE find_package with SDL2

I've got a project that uses CMAKE, and needs to link SDL2. I'm trying to understand how find_package works. At one point in the past, I was able to get find_package to work by supplying my own FindSDL2.cmake, but after some new linker errors, I decided to try a different apporoach. The reading I'm doing seems to imply that, after I've installed the libsdl2-dev package, I should be able to just use find_package(SDL2 REQUIRED) and then target_link_libraries(Suqua PRIVATE SDL2::SDL2), but cmake throws a package not found error. Do I need to provide a custom FindSDL2.cmake?

CMakeLists.txt

    cmake_minimum_required (VERSION 3.8)

set(CMAKE_CXX_STANDARD 17)

find_package(SDL2 CONFIG REQUIRED)

file(GLOB source_files
    "src/*.cpp"
    "header/*.h"
)

add_library(Suqua ${source_files} "src/glad.c" )

target_include_directories(Suqua PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/header)
target_include_directories(Suqua PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../include)

target_link_libraries(Suqua PRIVATE SDL2::SDL2 enet)

if(UNIX)
    target_link_libraries(Suqua PRIVATE stdc++fs)
endif()

Error

CMake Error at Suqua/CMakeLists.txt:13 (add_library):
  Target "Suqua" links to target "SDL2::SDL2" but the target was not found.
  Perhaps a find_package() call is missing for an IMPORTED target, or an
  ALIAS target is missing?

Thank you, and if you have any other critiques of my CMakeLists, they'd be greatly appreciated!

Upvotes: 1

Views: 1869

Answers (1)

Lurgypai
Lurgypai

Reputation: 71

Answer supplied by Tsyvarev

When using an installed library (not built from source), use the SD2_LIBRARIES variable.

On another note, I actually fixed this earlier, but assumed I was doing something wrong when I got a linker error relating to linking CMAKE_DL_LIBS, which I'd removed because I assumed it didn't do anything :/ Definitely gonna read through that CMake book. Thanks all!

Upvotes: 1

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