cmake HAVE_MBLEN examples

TA-Lib/ta-lib CMakeLists.txt :164 

check_function_exists(mblen HAVE_MBLEN)

apache/xerces-c cmake/XercesFunctions.cmake :54 

check_function_exists(mblen HAVE_MBLEN)

apache/xerces-c cmake/XercesTranscoderSelection.cmake :77 

check_function_exists(mblen HAVE_MBLEN)