add_executable cannot create target, another target with the same namea exist.

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  • 3 April 2018 at 11:59 #10748
    baymin
    Blocked

    Hello.

    When I was following the documentation on the Internet and I was doing
    the “Programming with SOFA”/”Start coding”, there were something wrong
    with my plugins.

    At first, It was always showing this:

    
CMake Error at CMakeLists.txt:15 (find_package):
  By not providing "FindSofaFramework.cmake" in CMAKE_MODULE_PATH this
  project has asked CMake to find a package configuration file provided by
  "SofaFramework", but CMake did not find one.

    Then I dealt it like this:

    
cmake -DCMAKE_PREFIX_PATH=/home/baymin/sofa/lib/cmake

    And it showed that:

    
CMake Error at CMakeLists.txt:28 (add_executable):
  add_executable cannot create target "MyPlugin" because another target with
  the same name already exists.  The existing target is a shared library
  created in source directory
  "/home/baymin/sofa/src/applications/plugins/MyPlugin".  See
  documentation for policy CMP0002 for more details.

    So what should I do to build my plugins?

    Thank you very much.

    Best,

    Baymin

    4 April 2018 at 15:14 #10758
    baymin
    Blocked

    Hi,

    I found my mistake about building my plugins from the tutorial. Build a package in sofa/applications/plugins, and then add “sofa_add_plugin” into the CMakeList.txt in plugins. By using “cmake-gui ../../src” I can select my plugin package, and use “make” to build it.

    But there are some new problems:

    
SofaComponentAdvanced/initComponentAdvanced.h: No such file or directory

    Then I copy the “sofa/modules” into “sofa/SofaKernel/modules” and new problems appear: 

    
In function ‘int main(int, char**)’:
error: ‘ExecParams’ has not been declared
     ExecParams::defaultInstance()->setAspectID(0);
error: ‘GNode’ is not a member of ‘sofa::simulation::tree’
     sofa::simulation::tree::GNode* groot = new sofa::simulation::tree::GNode;
...

    I copied the Main.cpp from the docmetation:

    Write a scene in Cpp


    So how can I build my own plugins.

    Thank you very much.

    Best,

    Baymin

    5 April 2018 at 08:03 #10759
    baymin
    Blocked

    Hi,

    I had put my plugin package into “sofa/applications/projects”, and then add “sofa_add_plugin” into the CMakeList.txt in “sofa/applications/projects”. By using “cmake-gui ../../src” and use “make” to build it.

    The problems cannot find “*.h” files had been solved, but there are some new problems again:

    
In file included from sofa/applications/projects/MyPlugin/Main.cpp:17:0:
sofa/SofaKernel/SofaCommon/../modules/SofaSimulationTree/GNode.h: In function ‘int main(int, char**)’:
sofa/SofaKernel/SofaCommon/../modules/SofaSimulationTree/GNode.h:48:5: error: ‘sofa::simulation::tree::GNode::GNode(const string&, sofa::simulation::tree::GNode*)’ is protected
     GNode( const std::string& name="", GNode* parent=NULL  );
     ^
sofa/applications/projects/MyPlugin/Main.cpp:57:72: error: within this context
     sofa::simulation::tree::GNode* groot = new sofa::simulation::tree::GNode;
                                                                        ^
sofa/applications/projects/MyPlugin/Main.cpp:60:12: error: ‘class sofa::simulation::tree::GNode’ has no member named ‘setGravityInWorld’
     groot->setGravityInWorld(g);
            ^
sofa/applications/projects/MyPlugin/Main.cpp:72:51: error: request for member ‘get’ in ‘groot’, which is of pointer type ‘sofa::simulation::tree::GNode*’ (maybe you meant to use ‘->’ ?)
     sofa::simulation::getSimulation()->init(groot.get());

    I had use “grep” to find the function setGravityInWorld and could not find the definition of “setGravityInWorld”. So how can I build my own plugins and run them.

    Thank you very much.

    Best,

    Baymin

    27 April 2018 at 15:53 #10843
    Hugo
    Keymaster

    Sorry for the delay of reply @baymin !!

    Regarding the online documentation, you can update yourself when you find any issue/incorrect info. The documentation is Markdown files versioned on a Git repo :
    https://github.com/sofa-framework/doc
    Anyone can contribute (pull-request) !

    Your main issue is that you try to access a GNode line 17 of your Main.cpp which is protected. You can get inspired of the Main.cpp of the runSofa project in “sofa/applications/projects”“.

    I hope this helps.
    Best regards,

    Hugo

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