SFML not found - CLion/Cmake - c++

Question

I'm basically trying to make an SFML project in CLion which uses CMake.
I first downloaded SFML 2.2 which already had the .dylib files built. It said to install them in usr/local/lib and usr/local/include, but they didn't exist, so I created them and then put the files there.
I then opened up CLion, created a subdirectoy cmake_modules, placed the FindSFML.cmake file inside, and in the root project directory placed these files:
main.cpp
#include <SFML/Graphics.hpp>
int main()
{
sf::err() << "Hello, World!" << std::endl;
return 0;
}
CMakeLists.txt:
cmake_minimum_required(VERSION 3.2)
project(HelloWorld)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(SOURCE_FILES main.cpp)
add_executable(HelloWorld ${SOURCE_FILES})
set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake_modules" ${CMAKE_MODULE_PATH})
find_package(SFML COMPONENTS graphics window system REQUIRED)
include_directories(${SFML_INCLUDE_DIR})
target_link_libraries(HelloWorld ${SFML_Libraries})
The problem is that when I try to build the project, I get the following error:
Undefined symbols for architecture x86_64:
"sf::err()", referenced from:
_main in main.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I've tried searching for a solution, but none of them seem to be working. Did I put the files in the wrong place, or did I forget some import CMake setting? I know that setting SFML up with Xcode would be easier, but I'd prefer to use CLion if at all possible.

Answer 1

Ok, so I made an entirely new project, ran xcode-select --install on my terminal to make /usr/local/ a directory that gets searched by the compiler, downloaded SFML 2.3 instead of 2.2, decided to use the FindSFML.cmake file shipped with SFML, and made my CmakeLists.txt file look like so:
cmake_minimum_required(VERSION 3.2)
project(SFMLTest)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(SOURCE_FILES main.cpp)
add_executable(SFMLTest ${SOURCE_FILES})
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "~/SFML-2.3/cmake/Modules/")
find_package(SFML REQUIRED graphics window system)
if (SFML_FOUND)
include_directories(${SFML_INCLUDE_DIR})
target_link_libraries(SFMLTest ${SFML_LIBRARIES})
endif(SFML_FOUND)
This compiled and ran the following code in CLion:
#include <iostream>
#include <SFML/Graphics.hpp>
using namespace std;
int main()
{
sf::RenderWindow window(sf::VideoMode(640, 480), "Window");
while (window.isOpen())
{
sf::Event e;
while (window.pollEvent(e))
{
if (e.type == sf::Event::Closed)
{
window.close();
}
}
window.clear();
window.display();
}
return 0;
}
I don't know what exactly fixed everything, but I'm just glad it did. Hopefully this helps anyone else who's in a similar jam.

Answer 2

For SFML 2.5 and greater a more modern approach has been taken and setting up cmake is easier.
Example CMakeLists.txt
cmake_minimum_required(VERSION 3.1)
project(SFMLTest)
find_package(SFML 2.5 COMPONENTS graphics audio REQUIRED)
add_executable(SFMLTest main.cpp)
target_link_libraries(SFMLTest sfml-graphics sfml-audio)
Note :
Its no longer needed to setup FindSFML.cmake or SFML_ROOT etc.
SFML_LIBRARIES, SFML_DEPENDENCIES and SFML_INCLUDE_DIR don't exist
anymore
More info https://en.sfml-dev.org/forums/index.php?topic=24070.0

Answer 3

For others who downloaded SFML via brew, I managed to fix this by adding this to my CMakeLists.txt
set(SFML_ROOT /usr/local/lib)