[Bug c/65377] [5.0 Regression] cpp attribute check ala clang fails to compile

[npl at chello dot at]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65377

npl at chello dot at changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|INVALID                     |---

--- Comment #3 from npl at chello dot at ---
1) It simply shouldnt fail.
2) this is a generic header for C and C++.

__has_cpp_attribute(clang::fallthrough) should resolve to 0 and not fail. This
is a bug in gcc, unless you can explain why it shouldnt resolve to 0.