MS Variadic extension support for arm64

[Michael Cronenworth]

Hi,

Will gcc on arm64 support '__builtin_ms_va_list'? Should I file an RFE bug?

Wine 3.0.3 (and 3.8) introduced a change to require this extension and when it is 
missing wine will compile with clang. Clang 5.0 or higher is required for this 
extension and RHEL 7 ships Clang 3. Needless to say Wine no longer compiles on arm64 
and RHEL 7.

Did Martin Storsjo[1] or the Wine team ask gcc to support this?

Thanks,
Michael

[1] 
https://source.winehq.org/git/wine.git/commit/295359a17447d6ad487b6c652c3a98bbe17cee6e