[libsmi] libsmi reporting parse error, expecting '$'

Folks,

I was getting this error

IF-MIB:1: parse error, expecting `$'

on several differnt platforms and it finally turned out to be an issue with bison/flex. I do not know the details, but I do know that the combination

bison 1.875d and flex 2.5.31 does not work

while the combination

bison 2.1 and flex 2.5.4 seems to be fine.

So if someone runs into similar trouble, make sure you upgrade your build tools...

/js