Re: [PATCH iproute2] ip, route: fix minor compile warning

On Mon, Dec 14, 2015 at 04:34:29PM +0100, Daniel Borkmann wrote:

Seems like gcc (4.8.3) doesn't catch this false positive, triggering
after 0f7543322c5f ("route: ignore RTAX_HOPLIMIT of value -1"):

  iproute.c: In function 'print_route':
  iproute.c:301:12: warning: 'val' may be used uninitialized in this function [-Wmaybe-uninitialized]
     features &= ~RTAX_FEATURE_ECN;
              ^
  iproute.c:575:10: note: 'val' was declared here
      __u32 val;
            ^
So just shut it up by initializing to 0.

Hmm. Interestingly, my patch shouldn't have changed anything relevant
for gcc's decision. OTOH, I don't see a warning using gcc-4.9.3.

Cheers, Phil