@jacek: in the case of the toolchain not supporting build id, the ideal would be to have an explicit report at the end of the configuration of the problem. but that's not the case in the current situation. so your proposal won't make things that worst <g> (just a bit more cryptic to follow) but --enable-build-id is more targeted at packagers, so I'll update accordingly
<dream on>I'd love to be able to run the TRY_*_FLAGS directly with winegcc</dream>