Added --with-openmp flag to the build script

####

# Check for OpenMP

#

if( OPENMP_FOUND )

if( OPENMP_FOUND AND WITH_OPENMP STREQUAL "yes" )

   message( "Compiler supports OpenMP." )

   set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DHAVE_OPENMP ${OpenMP_CXX_FLAGS}" )

endif()

WITH_CLANG="no"

WITH_CUDA="yes"

WITH_CUDA_ARCH="auto"

WITH_OPENMP="yes"

WITH_TESTS="yes"

WITH_COVERAGE="no"

WITH_EXAMPLES="yes"

        --with-mic=*                     ) WITH_MIC="${option#*=}" ;;

        --with-cuda=*                    ) WITH_CUDA="${option#*=}" ;;

        --with-cuda-arch=*               ) WITH_CUDA_ARCH="${option#*=}";;

        --with-openmp=*                  ) WITH_OPENMP="${option#*=}" ;;

        --with-tests=*                   ) WITH_TESTS="${option#*=}" ;;

        --with-coverage=*                ) WITH_COVERAGE="${option#*=}" ;;

        --with-examples=*                ) WITH_EXAMPLES="${option#*=}" ;;

    echo "   --with-mic=yes/no                     Enable MIC (Intel Xeon Phi). 'no' by default (Intel Compiler required)."

    echo "   --with-cuda=yes/no                    Enable CUDA. 'yes' by default (CUDA Toolkit is required)."

    echo "   --with-cuda-arch=all/auto/30/35/...   Choose CUDA architecture. 'auto' by default."

    echo "   --with-openmp=yes/no                  Enable OpenMP. 'yes' by default."

    echo "   --with-tests=yes/no                   Enable unit tests. 'yes' by default."

    echo "   --with-coverage=yes/no                Enable code coverage reports for unit tests. 'no' by default (lcov is required)."

    echo "   --with-examples=yes/no                Compile the 'examples' directory. 'yes' by default."

         -DWITH_MIC=${WITH_MIC} \

         -DWITH_CUDA=${WITH_CUDA} \

         -DWITH_CUDA_ARCH=${WITH_CUDA_ARCH} \

         -DWITH_OPENMP=${WITH_OPENMP} \

         -DWITH_TESTS=${WITH_TESTS} \

         -DWITH_COVERAGE=${WITH_COVERAGE} \

         -DWITH_EXAMPLES=${WITH_EXAMPLES} \