https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107942
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Oh it is still part of the keyword index too: https://gcc.gnu.org/onlinedocs/gcc/Keyword-Index.html#Keyword-Index Which links to: https://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html#index-volatile-applied-to-function