if(NOT HAVE_OCC) # from gmsh
 if(WIN32 OR CYGWIN)
    if(HAVE_64BIT_SIZE_T)
      set(OCC_SYS_NAME win64)
    else(HAVE_64BIT_SIZE_T)
      set(OCC_SYS_NAME win32)
    endif(HAVE_64BIT_SIZE_T)
  else(WIN32 OR CYGWIN)
    set(OCC_SYS_NAME ${CMAKE_SYSTEM_NAME})
  endif(WIN32 OR CYGWIN)
  set(OCC_LIBS_REQUIRED
      # subset of DataExchange
# old      TKSTEP TKSTEP209 TKSTEPAttr TKSTEPBase TKIGES
	TKDESTEP TKDEIGES
       TKXSBase
      # ModelingAlgorithms
      TKOffset TKFeat TKFillet TKBool TKShHealing TKMesh TKHLR TKBO TKPrim
      TKTopAlgo TKGeomAlgo
      # ModelingData
      TKBRep TKGeomBase TKG3d TKG2d
      # FoundationClasses
       TKMath TKernel  )
      # TKAdvTools -- not necessary? (and removed from OCC 6.8)
  list(LENGTH OCC_LIBS_REQUIRED NUM_OCC_LIBS_REQUIRED)
  set(OCC_LIBS)
  foreach(OCC ${OCC_LIBS_REQUIRED})
    find_library(OCC_LIB ${OCC} HINTS ENV CASROOT PATH_SUFFIXES lib 
                 ${OCC_SYS_NAME}/lib ${OCC_SYS_NAME}/vc8/lib)
    if(OCC_LIB)
      list(APPEND OCC_LIBS ${OCC_LIB})
    else(OCC_LIB)
      message(STATUS "OCC lib " ${OCC} " not Found")
    endif(OCC_LIB)
    unset(OCC_LIB CACHE)
  endforeach(OCC)
  list(LENGTH OCC_LIBS NUM_OCC_LIBS)
  if(NUM_OCC_LIBS EQUAL NUM_OCC_LIBS_REQUIRED)
    find_path(OCC_INC "BRep_Tool.hxx" PATHS ENV CASROOT PATH_SUFFIXES inc 
              include include/oce opencascade)
    if(OCC_INC)
      set(IBREP_HAVE_OCC TRUE)
      add_definitions(-DIBREP_HAVE_OCC)
      list(APPEND EXTERNAL_LIBRARIES ${OCC_LIBS})
      list(APPEND EXTERNAL_INCLUDES ${OCC_INC})
      if(HAVE_64BIT_SIZE_T)
        add_definitions(-D_OCC64)
      endif(HAVE_64BIT_SIZE_T)
      if(CYGWIN)
        list(APPEND EXTERNAL_LIBRARIES "winspool")
      elseif(MSVC)
        add_definitions(-DWNT)
      endif(CYGWIN)
      find_path(OCC_CONFIG_H "config.h" PATHS ${OCC_INC} ${OCC_CONFIG_H_PATH}
                NO_DEFAULT_PATH)
      if(NOT OCC_CONFIG_H)
        add_definitions(-DHAVE_NO_OCC_CONFIG_H)
      endif(NOT OCC_CONFIG_H)
    endif(OCC_INC)
  endif(NUM_OCC_LIBS EQUAL NUM_OCC_LIBS_REQUIRED)
endif(NOT HAVE_OCC)
#else(NOT HAVE_OCC)
  set(IBREP_HAVE_OCC TRUE)
  add_definitions(-DIBREP_HAVE_OCC)
#endif(NOT HAVE_OCC)

message("OCC_INC= ${OCC_INC}")
include_directories(${OCC_INC})
include_directories(../../gnurbs/trunk/api ../gnurbs ../mesh ../gnurbs_interface)
add_library (ibrep-occ-dynamic SHARED  IBrepOCC.cc IVertexOCC.cc IEdgeOCC.cc ICurveOCC.cc  IFaceOCC.cc ISurfaceOCC.cc OCC_Connect.cpp IVolumeOCC.cc )
add_library (ibrep-occ-static STATIC EXCLUDE_FROM_ALL IBrepOCC.cc IVertexOCC.cc IEdgeOCC.cc ICurveOCC.cc  IFaceOCC.cc ISurfaceOCC.cc OCC_Connect.cpp IVolumeOCC.cc )  
SET_TARGET_PROPERTIES(ibrep-occ-static PROPERTIES OUTPUT_NAME "ibrep-occ")
SET_TARGET_PROPERTIES(ibrep-occ-dynamic PROPERTIES OUTPUT_NAME "ibrep-occ")
target_link_libraries (ibrep-occ-dynamic ${LIBS} ibrep-dynamic ibrep-mesh-dynamic gnurbs-dynamic ${OCC_LIBS_REQUIRED} )
target_link_libraries (ibrep-occ-static ${LIBS} ibrep-static ibrep-mesh-static gnurbs-static ${OCC_LIBS_REQUIRED} )
add_subdirectory(test)