https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119400
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- https://learn.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-c4430?view=msvc-170 This error might be generated due to compiler conformance work done for Visual Studio 2005: all declarations must explicitly specify the type; int is no longer assumed. GCC notion of MS windows extensions as pre-2005.
