[Bug d/91666] _builtin function no work with GDC

[ibuclaw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91666

ibuclaw at gcc dot gnu.org changed:

           What    |Removed                     |Added
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                 CC|                            |ibuclaw at gcc dot gnu.org

--- Comment #1 from ibuclaw at gcc dot gnu.org ---
Either the function signature on MinGW-W64 is untranslatable into valid D, or
the gcc.builtins module is not imported in any of the code paths that are
enabled by MinGW.

It's most likely to be the latter.