314072 2026-05-05 05:43:15 -0700 Guard Apple-specific WTF headers 2026-05-08 10:43:59 -0700 1 1 1 Unclassified WebKit Web Template Framework WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 adrian_taylor webkit-unassigned webkit-bug-importer oldest_to_newest 2207613 0 adrian_taylor 2026-05-05 05:43:15 -0700 Swift/C++ interop requires a modulemap to be provided describing the layout of WTF headers. Ideally, we want to use the same modulemap for all WebKit platforms. Some of the headers listed in that modulemap are for Apple-only features. Until now, those headers were never interpreted on non-Apple platforms, but the modulemap causes Swift's embedded clang to try to build them. Solve that problem by adding platform header guards. An alternative is to add various directives in the modulemap but I understand header guards are considered best practice. 2207614 1 webkit-bug-importer 2026-05-05 05:43:23 -0700 <rdar://problem/176259431> 2207616 2 adrian_taylor 2026-05-05 05:46:00 -0700 Pull request: https://github.com/WebKit/WebKit/pull/64259 2209058 3 ews-feeder 2026-05-08 10:43:57 -0700 Committed 312898@main (4a7474b8b00a): <https://commits.webkit.org/312898@main> Reviewed commits have been landed. Closing PR #64259 and removing active labels.