WindowViewBackend does not build with clang, because the wl_array_for_each() macro is used with a pointer to void, which does not allow to do arithmetic: Tools/wpe/backends/WindowViewBackend.cpp:445:106: error: arithmetic on a pointer to void for (p = (states)->data; (const char *) p < ((const char *) (states)->data + (states)->size); (p)++) ~~~^ Also see this wayland issue: https://gitlab.freedesktop.org/wayland/wayland/issues/34
*** This bug has been marked as a duplicate of bug 194898 ***