[Bug c++/90227] [9 Regression] trunk rejects polymake since r269965

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90227

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
icc also accepts #c1 with -std=c++14.