cmake _HAVE_PREAD examples

HDFGroup/hdf5 config/ConfigureChecks.cmake :430 

CHECK_FUNCTION_EXISTS (pread             ${HDF_PREFIX}_HAVE_PREAD)

InsightSoftwareConsortium/ITK Modules/ThirdParty/HDF5/src/itkhdf5/config/cmake/ConfigureChecks.cmake :414 

CHECK_FUNCTION_EXISTS (pread             ${HDF_PREFIX}_HAVE_PREAD)

Tencent/Forward source/third_party/hdf5/config/cmake_ext_mod/ConfigureChecks.cmake :505 

CHECK_FUNCTION_EXISTS (pread             ${HDF_PREFIX}_HAVE_PREAD)

Kitware/VTK ThirdParty/hdf5/vtkhdf5/config/cmake_ext_mod/ConfigureChecks.cmake :447 

CHECK_FUNCTION_EXISTS (pread             ${HDF_PREFIX}_HAVE_PREAD)