Compilation failed with error: 'SKB_GSO_UDP' undeclared (first use in this function) As pointed out in https://forums.gentoo.org/viewtopic-t-1070060.html almost 2 month ago! Patch provided by user HerbMillerJW courtesy: https://gist.github.com/herbmillerjr/039c129e9c25b047b906e19ad1f23a59 is enough for successful build.
Confirm this. Same error.
*** This bug has been marked as a duplicate of bug 636484 ***