I must admit that I'm a bit lost which one is which between `DLLFLAGS`, `UNIXDLLFLAGS` and `LDDLLFLAGS`. So if it's fine to tie winebuild `unwind_tables` to `is_pe` unless forced otherwise I'll do that.
Basically `DLLFLAGS` is for compiling and `LDDLLFLAGS` for linking. `UNIXDLLFLAGS` is a hack to bypass the `-fno-PIC` flag we use on i386, I'm hoping to get rid of it eventually.