Created attachment 383344 [details] eglmesaext-include.patch webkit-gtk relies on EGL/eglmesaext.h header. This header is indirectly included via EGL/eglext.h when building against mesa. But this is not the case with headers provided by libglvnd. Build error: /tmp/portage/net-libs/webkit-gtk-2.24.4/work/webkitgtk-2.24.4/Source/WebKit/UIProcess/gtk/WaylandCompositor.cpp: In member function ‘void* WebKit::WaylandCompositor::Buffer::createImage() const’: /tmp/portage/net-libs/webkit-gtk-2.24.4/work/webkitgtk-2.24.4/Source/WebKit/UIProcess/gtk/WaylandCompositor.cpp:134:116: error: ‘EGL_WAYLAND_BUFFER_WL’ was not declared in this scope 134 | return static_cast<EGLImageKHR*>(eglCreateImage(PlatformDisplay::sharedDisplay().eglDisplay(), EGL_NO_CONTEXT, EGL_WAYLAND_BUFFER_WL, m_resource, nullptr)); | ^~~~~~~~~~~~~~~~~~~~~ Attached patch fixes this issue for me. Downstream bug: https://bugs.gentoo.org/699054
mesa-19.3 will remove this #include from public headers as well: https://cgit.freedesktop.org/mesa/mesa/commit/?h=staging/19.3&id=87efb9f3a4f366372bc873dee741a2c2f272e5c9
This has been fixed in r253553 :] *** This bug has been marked as a duplicate of bug 205250 ***