cmake _HAVE_STRCASESTR examples

HDFGroup/hdf5 config/ConfigureChecks.cmake :433 

CHECK_FUNCTION_EXISTS (strcasestr        ${HDF_PREFIX}_HAVE_STRCASESTR)

InsightSoftwareConsortium/ITK Modules/ThirdParty/HDF5/src/itkhdf5/config/cmake/ConfigureChecks.cmake :419 

CHECK_FUNCTION_EXISTS (strcasestr        ${HDF_PREFIX}_HAVE_STRCASESTR)