Currently we emit API_AVAILABLE headers for WebKit API/SPI by default, and disable them when building for older major OS versions. We can remove a point of version number churn if we control postprocessing based on the kind of build, not the targeted OS version.
rdar://105031778
Pull request: https://github.com/WebKit/WebKit/pull/9716
Committed 260346@main (6e4108c84c04): <https://commits.webkit.org/260346@main> Reviewed commits have been landed. Closing PR #9716 and removing active labels.