CMake error when try to add external library












0















I need to add an external library in my project.
Here is the project structure:



/- src/
- my source files here…
|- dist/
|- FLTK
|- lib/
|- libfltk.a
|- libfltk_forms.a
|- FL
|- build/
|- main.cpp


Here is my CMakeLists.txt



cmake_minimum_required(VERSION 2.8)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -std=c++17")

find_library(LibFltk ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/libfltk.a)
find_library(LibFltk_Forms ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/libfltk_forms.a)

if(APPLE)
find_library(COCOA Cocoa)
endif()

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK)

add_executable(${CMAKE_CURRENT_SOURCE_DIR}/build/main ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp)

target_link_libraries(${CMAKE_CURRENT_SOURCE_DIR}/build/main ${LibFltk} ${COCOA})


Error message:



    CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
LibFltk
linked by target "keyplay" in directory /Users/coder/Desktop/sandbox/keyplay


-- Configuring incomplete, errors occurred!



When I try to compile my project from terminal it works perfect.
This is how I do it:



g++ -std=c++17 -c main.cpp -I dist/FLTK 
&& g++ main.o -o main -L dist/FLTK/lib -lfltk_forms
-lfltk_images
-lfltk
-lfltk_gl
-framework Cocoa
&& ./main


What is wrong in my CMakeLists.txt?



Thanks.










share|improve this question


















  • 1





    Have you tried (cmake.org/cmake/help/v3.0/command/find_library.html) find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)?

    – Matthieu Brucher
    Nov 25 '18 at 12:03











  • Thanks Matthieu, it helped me!

    – Levon Sarkisov
    Nov 25 '18 at 12:11











  • Did it solve the issue? If yes, I'll make it an answer.

    – Matthieu Brucher
    Nov 25 '18 at 12:12











  • Yes, Matthieu, it was the correct answer.

    – Levon Sarkisov
    Nov 25 '18 at 12:13


















0















I need to add an external library in my project.
Here is the project structure:



/- src/
- my source files here…
|- dist/
|- FLTK
|- lib/
|- libfltk.a
|- libfltk_forms.a
|- FL
|- build/
|- main.cpp


Here is my CMakeLists.txt



cmake_minimum_required(VERSION 2.8)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -std=c++17")

find_library(LibFltk ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/libfltk.a)
find_library(LibFltk_Forms ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/libfltk_forms.a)

if(APPLE)
find_library(COCOA Cocoa)
endif()

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK)

add_executable(${CMAKE_CURRENT_SOURCE_DIR}/build/main ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp)

target_link_libraries(${CMAKE_CURRENT_SOURCE_DIR}/build/main ${LibFltk} ${COCOA})


Error message:



    CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
LibFltk
linked by target "keyplay" in directory /Users/coder/Desktop/sandbox/keyplay


-- Configuring incomplete, errors occurred!



When I try to compile my project from terminal it works perfect.
This is how I do it:



g++ -std=c++17 -c main.cpp -I dist/FLTK 
&& g++ main.o -o main -L dist/FLTK/lib -lfltk_forms
-lfltk_images
-lfltk
-lfltk_gl
-framework Cocoa
&& ./main


What is wrong in my CMakeLists.txt?



Thanks.










share|improve this question


















  • 1





    Have you tried (cmake.org/cmake/help/v3.0/command/find_library.html) find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)?

    – Matthieu Brucher
    Nov 25 '18 at 12:03











  • Thanks Matthieu, it helped me!

    – Levon Sarkisov
    Nov 25 '18 at 12:11











  • Did it solve the issue? If yes, I'll make it an answer.

    – Matthieu Brucher
    Nov 25 '18 at 12:12











  • Yes, Matthieu, it was the correct answer.

    – Levon Sarkisov
    Nov 25 '18 at 12:13
















0












0








0








I need to add an external library in my project.
Here is the project structure:



/- src/
- my source files here…
|- dist/
|- FLTK
|- lib/
|- libfltk.a
|- libfltk_forms.a
|- FL
|- build/
|- main.cpp


Here is my CMakeLists.txt



cmake_minimum_required(VERSION 2.8)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -std=c++17")

find_library(LibFltk ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/libfltk.a)
find_library(LibFltk_Forms ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/libfltk_forms.a)

if(APPLE)
find_library(COCOA Cocoa)
endif()

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK)

add_executable(${CMAKE_CURRENT_SOURCE_DIR}/build/main ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp)

target_link_libraries(${CMAKE_CURRENT_SOURCE_DIR}/build/main ${LibFltk} ${COCOA})


Error message:



    CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
LibFltk
linked by target "keyplay" in directory /Users/coder/Desktop/sandbox/keyplay


-- Configuring incomplete, errors occurred!



When I try to compile my project from terminal it works perfect.
This is how I do it:



g++ -std=c++17 -c main.cpp -I dist/FLTK 
&& g++ main.o -o main -L dist/FLTK/lib -lfltk_forms
-lfltk_images
-lfltk
-lfltk_gl
-framework Cocoa
&& ./main


What is wrong in my CMakeLists.txt?



Thanks.










share|improve this question














I need to add an external library in my project.
Here is the project structure:



/- src/
- my source files here…
|- dist/
|- FLTK
|- lib/
|- libfltk.a
|- libfltk_forms.a
|- FL
|- build/
|- main.cpp


Here is my CMakeLists.txt



cmake_minimum_required(VERSION 2.8)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -std=c++17")

find_library(LibFltk ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/libfltk.a)
find_library(LibFltk_Forms ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/libfltk_forms.a)

if(APPLE)
find_library(COCOA Cocoa)
endif()

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK)

add_executable(${CMAKE_CURRENT_SOURCE_DIR}/build/main ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp)

target_link_libraries(${CMAKE_CURRENT_SOURCE_DIR}/build/main ${LibFltk} ${COCOA})


Error message:



    CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
LibFltk
linked by target "keyplay" in directory /Users/coder/Desktop/sandbox/keyplay


-- Configuring incomplete, errors occurred!



When I try to compile my project from terminal it works perfect.
This is how I do it:



g++ -std=c++17 -c main.cpp -I dist/FLTK 
&& g++ main.o -o main -L dist/FLTK/lib -lfltk_forms
-lfltk_images
-lfltk
-lfltk_gl
-framework Cocoa
&& ./main


What is wrong in my CMakeLists.txt?



Thanks.







c++ cmake fltk






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 25 '18 at 11:48









Levon SarkisovLevon Sarkisov

1818




1818








  • 1





    Have you tried (cmake.org/cmake/help/v3.0/command/find_library.html) find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)?

    – Matthieu Brucher
    Nov 25 '18 at 12:03











  • Thanks Matthieu, it helped me!

    – Levon Sarkisov
    Nov 25 '18 at 12:11











  • Did it solve the issue? If yes, I'll make it an answer.

    – Matthieu Brucher
    Nov 25 '18 at 12:12











  • Yes, Matthieu, it was the correct answer.

    – Levon Sarkisov
    Nov 25 '18 at 12:13
















  • 1





    Have you tried (cmake.org/cmake/help/v3.0/command/find_library.html) find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)?

    – Matthieu Brucher
    Nov 25 '18 at 12:03











  • Thanks Matthieu, it helped me!

    – Levon Sarkisov
    Nov 25 '18 at 12:11











  • Did it solve the issue? If yes, I'll make it an answer.

    – Matthieu Brucher
    Nov 25 '18 at 12:12











  • Yes, Matthieu, it was the correct answer.

    – Levon Sarkisov
    Nov 25 '18 at 12:13










1




1





Have you tried (cmake.org/cmake/help/v3.0/command/find_library.html) find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)?

– Matthieu Brucher
Nov 25 '18 at 12:03





Have you tried (cmake.org/cmake/help/v3.0/command/find_library.html) find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)?

– Matthieu Brucher
Nov 25 '18 at 12:03













Thanks Matthieu, it helped me!

– Levon Sarkisov
Nov 25 '18 at 12:11





Thanks Matthieu, it helped me!

– Levon Sarkisov
Nov 25 '18 at 12:11













Did it solve the issue? If yes, I'll make it an answer.

– Matthieu Brucher
Nov 25 '18 at 12:12





Did it solve the issue? If yes, I'll make it an answer.

– Matthieu Brucher
Nov 25 '18 at 12:12













Yes, Matthieu, it was the correct answer.

– Levon Sarkisov
Nov 25 '18 at 12:13







Yes, Matthieu, it was the correct answer.

– Levon Sarkisov
Nov 25 '18 at 12:13














2 Answers
2






active

oldest

votes


















1














The find_library function expects the second argument to be the filename you are targeting (http://www.cmake.org/cmake/help/v3.0/command/find_library.html), and you need to specify the paths where to look as additional arguments:



find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)
find_library(LibFltk_Forms libfltk_forms.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)





share|improve this answer

































    0














    Thanks to @Matthieu Brucher. Here is correct config:



    cmake_minimum_required(VERSION 2.8)

    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -std=c++17")
    include_directories(${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK)

    add_executable(keyplay ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp)

    find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)

    if(APPLE)
    find_library(COCOA Cocoa)
    endif()

    target_link_libraries(keyplay ${LibFltk} ${COCOA})





    share|improve this answer























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      2 Answers
      2






      active

      oldest

      votes








      2 Answers
      2






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      1














      The find_library function expects the second argument to be the filename you are targeting (http://www.cmake.org/cmake/help/v3.0/command/find_library.html), and you need to specify the paths where to look as additional arguments:



      find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)
      find_library(LibFltk_Forms libfltk_forms.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)





      share|improve this answer






























        1














        The find_library function expects the second argument to be the filename you are targeting (http://www.cmake.org/cmake/help/v3.0/command/find_library.html), and you need to specify the paths where to look as additional arguments:



        find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)
        find_library(LibFltk_Forms libfltk_forms.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)





        share|improve this answer




























          1












          1








          1







          The find_library function expects the second argument to be the filename you are targeting (http://www.cmake.org/cmake/help/v3.0/command/find_library.html), and you need to specify the paths where to look as additional arguments:



          find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)
          find_library(LibFltk_Forms libfltk_forms.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)





          share|improve this answer















          The find_library function expects the second argument to be the filename you are targeting (http://www.cmake.org/cmake/help/v3.0/command/find_library.html), and you need to specify the paths where to look as additional arguments:



          find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)
          find_library(LibFltk_Forms libfltk_forms.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)






          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 25 '18 at 12:31

























          answered Nov 25 '18 at 12:13









          Matthieu BrucherMatthieu Brucher

          14.8k32140




          14.8k32140

























              0














              Thanks to @Matthieu Brucher. Here is correct config:



              cmake_minimum_required(VERSION 2.8)

              set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -std=c++17")
              include_directories(${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK)

              add_executable(keyplay ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp)

              find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)

              if(APPLE)
              find_library(COCOA Cocoa)
              endif()

              target_link_libraries(keyplay ${LibFltk} ${COCOA})





              share|improve this answer




























                0














                Thanks to @Matthieu Brucher. Here is correct config:



                cmake_minimum_required(VERSION 2.8)

                set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -std=c++17")
                include_directories(${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK)

                add_executable(keyplay ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp)

                find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)

                if(APPLE)
                find_library(COCOA Cocoa)
                endif()

                target_link_libraries(keyplay ${LibFltk} ${COCOA})





                share|improve this answer


























                  0












                  0








                  0







                  Thanks to @Matthieu Brucher. Here is correct config:



                  cmake_minimum_required(VERSION 2.8)

                  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -std=c++17")
                  include_directories(${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK)

                  add_executable(keyplay ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp)

                  find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)

                  if(APPLE)
                  find_library(COCOA Cocoa)
                  endif()

                  target_link_libraries(keyplay ${LibFltk} ${COCOA})





                  share|improve this answer













                  Thanks to @Matthieu Brucher. Here is correct config:



                  cmake_minimum_required(VERSION 2.8)

                  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -std=c++17")
                  include_directories(${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK)

                  add_executable(keyplay ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp)

                  find_library(LibFltk libfltk.a PATHS ${CMAKE_CURRENT_SOURCE_DIR}/dist/FLTK/lib/)

                  if(APPLE)
                  find_library(COCOA Cocoa)
                  endif()

                  target_link_libraries(keyplay ${LibFltk} ${COCOA})






                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Nov 25 '18 at 12:12









                  Levon SarkisovLevon Sarkisov

                  1818




                  1818






























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