Target link Eigen library on Clion fails

Bmk95 0
Viewed 24

I am trying to link eigen to my project on clion, but the following error is printed:

This is my cmakelist file with all the attempts to link the library:

cmake_minimum_required(VERSION 2.8.3)
project(planner_standalone_grasp)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O0")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-diagnostics-color")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")

# find all cpp files in currect directory (where CMakeLists.txt is)
file(GLOB SOURCE_FILES FILES_MATCHING PATTERN "./src/*.cpp")


include_directories(src)


add_executable(${PROJECT_NAME} main.cpp ${SOURCE_FILES})


set(EXE_LIBS
    ctop_common
    ctop_log
    ctop_util

    eigen
    crl
    crl-algorithm
    crl-loader
    crl-tsplib
    yaml-cpp
)


target_link_directories(${PROJECT_NAME} PUBLIC lib/comrob/lib/)
target_link_directories(${PROJECT_NAME} PUBLIC ctop/common/cmake-build-debug/)
target_link_directories(${PROJECT_NAME} PUBLIC ctop/log/cmake-build-debug/)
target_link_directories(${PROJECT_NAME} PUBLIC ctop/util/cmake-build-debug/)


set(EIGEN_DIR "/usr/local/include/Eigen/")
include_directories(${EIGEN_DIR})


find_package (Eigen3 3.3 REQUIRED NO_MODULE)
target_link_libraries (${PROJECT_NAME} Eigen3::Eigen)

target_link_directories(${PROJECT_NAME} PUBLIC lib/eigen/Eigen/)
target_link_directories(${PROJECT_NAME} PUBLIC /usr/local/include/Eigen/)
target_link_directories(${PROJECT_NAME} PUBLIC /usr/local/include/eigen3/Eigen/)


target_link_libraries(${PROJECT_NAME} ${EXE_LIBS})

All other libraries in the project are successfully linked except Eigen - This is the error message:

[6/6] Linking CXX executable planner_standalone_grasp
FAILED: planner_standalone_grasp 
: && /usr/bin/c++ -O0 -fno-diagnostics-color -std=c++17 -g -rdynamic CMakeFiles/planner_standalone_grasp.dir/main.cpp.o CMakeFiles/planner_standalone_grasp.dir/src/Grasp.cpp.o CMakeFiles/planner_standalone_grasp.dir/src/WallEdge.cpp.o CMakeFiles/planner_standalone_grasp.dir/src/WallGraph.cpp.o CMakeFiles/planner_standalone_grasp.dir/src/pt2eigen.cpp.o -o planner_standalone_grasp -L/home/sim/CLionProjects/Test/lib/comrob/lib   -L/home/sim/CLionProjects/Test/ctop/common/cmake-build-debug   -L/home/sim/CLionProjects/Test/ctop/log/cmake-build-debug   -L/home/sim/CLionProjects/Test/ctop/util/cmake-build-debug   -L/home/sim/CLionProjects/Test/lib/eigen/Eigen   -L/usr/local/include/Eigen   -L/usr/local/include/eigen3/Eigen -Wl,-rpath,/home/sim/CLionProjects/Test/lib/comrob/lib:/home/sim/CLionProjects/Test/ctop/common/cmake-build-debug:/home/sim/CLionProjects/Test/ctop/log/cmake-build-debug:/home/sim/CLionProjects/Test/ctop/util/cmake-build-debug:/home/sim/CLionProjects/Test/lib/eigen/Eigen:/usr/local/include/Eigen:/usr/local/include/eigen3/Eigen  -lctop_common  -lctop_log  -lctop_util  -leigen  -lcrl  -lcrl-algorithm  -lcrl-loader  -lcrl-tsplib  -lyaml-cpp && :
/usr/bin/ld: cannot find -leigen
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

Any help would be highly appreciated!

eigen clion c++
1 Answers

In my experience there is two possible causes for this issue:

  1. there is no library named libeigen. in the provided directories (the ones in target_link_directories). Perhaps the path is wrong? You should know that usually library files are not located in the include directories of a repository...
  2. there is a library named as such, though it was compiled for the wrong platform... i.e. a library compiled for linux cannot be linked if you are making an executable for windows. Usually you can find the source code and compile it yourself.

Hope this helps.

Plegeus0
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