Building the examples from the tutorial

If you want to build the examples from Feel++ tutorial:

# make a directory for the executables
mkdir feelpp-tutorial
cd feelpp-tutorial
# build the tutorial
cmake -DCMAKE_CXX_COMPILER=/usr/bin/clang++ -DCMAKE_BUILD_TYPE=Release /usr/share/doc/feel++-doc/examples/
# Adapt the number of processors you want to use
make -j 10

You can then launch the applications:

./feelpp_doc_myintegrals

Optionally retrieve data from the serveur (e.g. irma-atlas):

mkdir feel
cd feel
# To retrieve the data associated to application mymesh
rsync -avz <login>@irma-atlas.u-strasbg.fr:/home/atlas_home/<login>/feel/mymesh ./

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Building your own application myapp

If you want to create your own application and compile it to use Feel++, you must first create a CMakeLists.txt file with the following content:

cmake_minimum_required(VERSION 2.8)
find_path(FEELPP_CMAKE_MODULES FindFeel++.cmake PATHS /usr/share/feel/cmake/modules/ /usr/local/share/feel/cmake/modules/ )
if(FEELPP_CMAKE_MODULES)
    set(CMAKE_MODULE_PATH ${FEELPP_CMAKE_MODULES})
else()
    message(FATAL_ERROR "Feel++ does not seem to have been installed on this platform")
endif()
find_package(Feel++)
feelpp_add_application(loadmesh SRCS loadmesh.cpp INCLUDE_IN_ALL)

Here is presented an application named loadmesh, built from the source file loadmesh.cpp. The file loadmesh.cpp is a sample C++ file that will allow to load a mesh:

#include <feel/feel.hpp>                                                                                                                                                          

int main( int argc, char** argv )                                                                                                                                                 
{                                                                                                                                                                                 
    using namespace Feel;                                                                                                                                                         
    Environment env( _argc=argc, _argv=argv,                                                                                                                                      
                     _desc=feel_options(),                                                                                                                                        
                     _about=about(_name="loadmesh",                                                                                                                               
                                  _author="Christophe Prud'homme",                                                                                                                
                                  _email="christophe.prudhomme@feelpp.org") );                                                                                                    

    auto mesh = loadMesh( _mesh = new Mesh<Simplex<2>> );                                                                                                                         

    std::cout << "measure =" << std::endl                                                                                                                                         
              << integrate( elements( mesh ), cst( 1. ) ).evaluate() << "\n";                                                                                                     
    std::cout << "surface =" << std::endl                                                                                                                                         
              << integrate( boundaryfaces( mesh ), cst( 1. ) ).evaluate() << "\n";                                                                                                

}

Then configure your Feel++ application using this command and compile your application according to the resources available:

mkdir build;
cd build
cmake ..
make -j 4

Note that .. indicates that the CMakeLists.txt is in the top directory.

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Table of Contents

Building the examples from the tutorial

Building your own application myapp