https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84717
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |documentation
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-03-05
Summary|C compiler accepts fortran |suffix for double constant
|style suffix "d" with float |is a GCC extension is not
|number but result is |documented
|strange |
Ever confirmed|0 |1
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Extension but not documented as far as I can see.