Make examples get some errors

[fanzhenyu95]

When I make these examples, I got this error.

How can I address this error?

[astralien3000]

Hello,

Your version of ndn-riot is not up-to-date, this PR should have fixed this error.

[fanzhenyu95]

@astralien3000 Thanks for your help. I have updated to this new PR, but I get another error.

Could you tell me how to address it?

[astralien3000]

I don't know, maybe you have an old gcc (4.8.x ?). Try to upgrade it.