cmake _HAVE_FCNTL examples

HDFGroup/hdf5 config/ConfigureChecks.cmake :423 

CHECK_FUNCTION_EXISTS (fcntl             ${HDF_PREFIX}_HAVE_FCNTL)

InsightSoftwareConsortium/ITK Modules/ThirdParty/HDF5/src/itkhdf5/config/cmake/ConfigureChecks.cmake :407 

CHECK_FUNCTION_EXISTS (fcntl             ${HDF_PREFIX}_HAVE_FCNTL)

Tencent/Forward source/third_party/hdf5/config/cmake_ext_mod/ConfigureChecks.cmake :491 

CHECK_FUNCTION_EXISTS (fcntl             ${HDF_PREFIX}_HAVE_FCNTL)

Kitware/VTK ThirdParty/hdf5/vtkhdf5/config/cmake_ext_mod/ConfigureChecks.cmake :440 

CHECK_FUNCTION_EXISTS (fcntl             ${HDF_PREFIX}_HAVE_FCNTL)