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compilationcmakesfml
Kevin
Kevin

Reputation: 1009

Linking SFML within CMake, compiling from sources

I'm trying to include SFML as a dependency in my CMake project, and it compiles SFML fine, but I can't figure out how to link it.

Here's my CMakeLists.txt, with annotated comments:

cmake_minimum_required(VERSION 3.9.1)
set(CMAKE_LEGACY_CYGWIN_WIN32 1)
set (CMAKE_CXX_STANDARD 11) # Set C++11
project(CHIP8)

set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib) # static library
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib) # dynamic library
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin) # executables
set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/modules" ${CMAKE_MODULE_PATH})

# Include SFML
add_subdirectory(${CMAKE_SOURCE_DIR}/dep/SFML)
include_directories(${CMAKE_SOURCE_DIR}/dep/SFML/include)

#Include where to find headers
include_directories(./src)
include_directories(./src/headers)

# Do a GLOB search, and add them to executable
set(EXECUTABLE_NAME "CHIP8")
file(GLOB SRC_FILES
    "src/headers/*.h"
    "src/*.cpp"
)

add_executable(${EXECUTABLE_NAME} ${SRC_FILES})
target_link_libraries(${EXECUTABLE_NAME} SFML) #Here is where the problem lies!

As you can see, I'm adding the subdirectory ./dep/SFML so it compiles with its own CMakeLists. Including the headers too on the next line, which VSCode picks up.

However, I'm having trouble on the last line: target_link_libraries. It can't find sfml SFML or SFML2. Therefore, I'm not sure how to link it.

Anyone have any idea?

Thanks.

Upvotes: 0

Views: 1234

Answers (1)

Tsyvarev
Tsyvarev

Reputation: 66088

SFML is not a single library, but a set of libraries, each of which corresponds to some component. For component named 

<component-name>

the library target is named

sfml-<component-name>

When use SFML in your code, you should know which SFML component(s) you use (see SFML docs/tutorials), and link with corresponded libraries:

# Assuming you use "graphics" and "system" SFML components
target_link_libraries(<your-executable> sfml-graphics sfml-system)

Note, that such targets' naming is not officially documented, so it can be changed in the future.

Preferred way for link with SFML is to install it before (or during) configuring your project, and use

find_package(SFML REQUIRED COMPONENTS graphics system)
include_directories(${SFML_INCLUDE_DIR})
target_link_libraries(<your-executable> ${SFML_LIBRARIES})

Upvotes: 1

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