OpenBSD doesn't support AI_V4MAPPED but real-world D code assumes its presence. Add a dummy value of 0 to help prevent compiler errors (but, of course, without the benefits of AI_V4MAPPED). Discovered when building some code from the dub packages.
@ibara created dlang/druntime pull request #3604 "Fix Issue 22453 - OpenBSD: Add a dummy value for AI_V4MAPPED" fixing this issue: - Fix Issue 22453 - OpenBSD: Add a dummy value for AI_V4MAPPED https://github.com/dlang/druntime/pull/3604
dlang/druntime pull request #3604 "Fix Issue 22453 - OpenBSD: Add a dummy value for AI_V4MAPPED" was merged into stable: - f4fcc46eb838bc6c9aab0d7977e43a1d649130b6 by Brian Callahan: Fix Issue 22453 - OpenBSD: Add a dummy value for AI_V4MAPPED https://github.com/dlang/druntime/pull/3604