Gentoo's Bugzilla –
Attachment 594966 Details for
Bug 699190dev-qt/qtwayland-5.13.2 with >=media-libs/mesa-19.3.0_rc4: ../../../../hardwareintegration/compositor/linux-dmabuf-unstable-v1/linuxdmabufclientbufferintegration.h:92:5: error: ‘PFNEGLBINDWAYLANDDISPLAYWL’ does not name a type