https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68524
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-14
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Clang also supports the syntax with a warning. Confirmed (I have no idea how
challenging it might be to implement). There also is a proposal to add the
standard C++ attribute syntax (e.g., [[gnu::const]]) to C. The C++ syntax
doesn't allow attributes there.