Cannot find package GLFW using CMake

1
votes

My project structure looks like this:

  • CMakeLists.txt
  • deps
    • glew
    • glfw
  • include
  • src
    • ...
    • graphics
      • ...
      • CMakeLists.txt

Two CMakeLists.txt files that deserve attention:

CMakeLists.txt

cmake_minimum_required(VERSION 3.9)
project(noam_engine)

find_package(glfw3 REQUIRED)
find_package(OpenGL REQUIRED)
find_package(GLEW REQUIRED)

set(CMAKE_CXX_STANDARD 11)
set(NE_LIBRARIES common math graphics)

FOREACH(lib ${NE_LIBRARIES})
    add_subdirectory(src/${lib})
ENDFOREACH(lib)

add_executable(noam_engine src/main.cpp)

if(OPENGL_FOUND AND GLEW_FOUND)
    target_include_directories(noam_engine PUBLIC include ${OPENGL_INCLUDE_DIR} ${GLEW_INCLUDE_DIRS})
    target_link_libraries(noam_engine ${NE_LIBRARIES})
endif()

src/graphics/CMakeLists.txt

cmake_minimum_required(VERSION 3.9)

find_package(glfw3 REQUIRED)
find_package(OpenGL REQUIRED)
find_package(GLEW REQUIRED)

file(GLOB SRC "*.cpp")
add_library(graphics ${SRC})

if(OPENGL_FOUND AND GLEW_FOUND)
    target_include_directories(graphics PUBLIC ${PROJECT_SOURCE_DIR}/include ${OPENGL_INCLUDE_DIR} ${GLEW_INCLUDE_DIRS})
    target_link_libraries(graphics ${OPENGL_gl_LIBRARY} ${GLFW3_LIBRARY} ${GLEW_LIBRARIES})
    message(STATUS "GLFW and GLEW successfully linked")
    message(STATUS ${OPENGL_gl_LIBRARY})
    message(STATUS ${GLFW3_LIBRARY})
    message(STATUS ${GLEW_LIBRARIES})
else()
    message(STATUS "Cannot find GL libraries")
endif()

In a few words I want to create a bunch of static libraries of the engine, in particular, link graphics library with GL's, and finally link all of them with the executable in a root CMakeLists.txt.

But I noticed that ${GLFW3_LIBRARY} is empty and I got a linker error, for example, when I call glfwInit(). I followed the guide during building and installation of GLFW

cmake .
make
make install

I believe headers and libraries are in /usr/local/*, but apparently CMake cannot find them or maybe I did something wrong.

The only hypothesis I have is that find_package doesn't know about glfw3Config.cmake which is in deps/glfw/*

1
openglcmakeglfw
Call for find_package(glfw3 REQUIRED) has been succeed, but result of this call depends on the script used by it. If you have Findglfw3.cmake script, then "documentation" of the script is contained in its beginning lines. If you have glfw2Config.cmake script which looks like given one, then result of find_package call is a glfw target, with which you need to link your library. - Tsyvarev

1 Answers

1
votes

I took the script from https://github.com/JoeyDeVries/LearnOpenGL/blob/master/cmake/modules/FindGLFW3.cmake and put it into cmake folder. Then in CMakeLists.txt I added

list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake")

Now everything works properly

Thanks @Tsyvarev