Refactoring CMakeLists for smart pointers examples.

IF( BUILD_CUDA )

   CUDA_ADD_EXECUTABLE(UniquePointerExampleCuda UniquePointerExample.cu)

   ADD_CUSTOM_COMMAND( COMMAND UniquePointerExampleCuda > ${TNL_DOCUMENTATION_OUTPUT_SNIPPETS_PATH}/UniquePointerExample.out OUTPUT UniquePointerExample.out )

   CUDA_ADD_EXECUTABLE(SharedPointerExampleCuda SharedPointerExample.cu)

   ADD_CUSTOM_COMMAND( COMMAND SharedPointerExampleCuda > ${TNL_DOCUMENTATION_OUTPUT_SNIPPETS_PATH}/SharedPointerExample.out OUTPUT SharedPointerExample.out )

   CUDA_ADD_EXECUTABLE(DevicePointerExampleCuda DevicePointerExample.cu)

   ADD_CUSTOM_COMMAND( COMMAND DevicePointerExampleCuda > ${TNL_DOCUMENTATION_OUTPUT_SNIPPETS_PATH}/DevicePointerExample.out OUTPUT DevicePointerExample.out )

ADD_CUSTOM_TARGET( RunPointersExamples ALL DEPENDS

   UniquePointerExample.out

   SharedPointerExample.out

   DevicePointerExample.out

set( COMMON_EXAMPLES

   UniquePointerExample

   SharedPointerExample

   DevicePointerExample

)

if( BUILD_CUDA )

   foreach( target IN ITEMS ${COMMON_EXAMPLES} )

      cuda_add_executable( ${target}-cuda ${target}.cu OPTIONS )

      add_custom_command( COMMAND ${target}-cuda > ${TNL_DOCUMENTATION_OUTPUT_SNIPPETS_PATH}/${target}.out OUTPUT ${target}.out )

      set( CUDA_OUTPUTS ${CUDA_OUTPUTS} ${target}.out )

   endforeach()

else()

   foreach( target IN ITEMS ${COMMON_EXAMPLES} )

      add_executable( ${target} ${target}.cpp )

      add_custom_command( COMMAND ${target} > ${TNL_DOCUMENTATION_OUTPUT_SNIPPETS_PATH}/${target}.out OUTPUT ${target}.out )

      set( HOST_OUTPUTS ${HOST_OUTPUTS} ${target}.out )

   endforeach()

endif()

IF( BUILD_CUDA )

   ADD_CUSTOM_TARGET( RunPointersExamples-cuda ALL DEPENDS ${CUDA_OUTPUTS} )

ELSE()

   ADD_CUSTOM_TARGET( RunPointersExamples ALL DEPENDS ${HOST_OUTPUTS} )

ENDIF()