I can't remember how to solve this problem in slackware 8 compilation (today ntop snapshot)
libtool: link: CURRENT `-release' is not a nonnegative integer
libtool: link: `-release' is not valid version information
gmake[2]: *** [libntop.la] Error 1
gmake[2]: Leaving directory `/norad/ntop-current/ntop'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory `/norad/ntop-current/ntop'
gmake: *** [all-recursive-am] Error 2
root@tbox:/norad/ntop-current/ntop#
