cmake HAVE_WCWIDTH examples

arkdb/inception cmake/readline.cmake :45 

CHECK_FUNCTION_EXISTS(wcwidth HAVE_WCWIDTH)

alibaba/AliSQL cmake/readline.cmake :47 

CHECK_FUNCTION_EXISTS(wcwidth HAVE_WCWIDTH)

Tokutek/mysql-5.5 cmake/readline.cmake :45 

CHECK_FUNCTION_EXISTS(wcwidth HAVE_WCWIDTH)