meson: enforce -Wundef
With a tiny bit of rigueur, this allows us to catch all #if typos and missing #includes, as seen in the previous commit. Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
With a tiny bit of rigueur, this allows us to catch all #if typos and missing #includes, as seen in the previous commit. Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>