if you experience an error message like below while installing geoip-c gem
checking for GeoIPrecordby_ipnum() in -lGeoIP... no
you must have geoip c library installed!
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the mkmf.log file for more
details. You may need configuration options.
try installing the gem like this
env LDFLAGS=-L/usr/local/Cellar/geoip/1.5.1/lib CFLAGS=-I/usr/local/Cellar/geoip/1.5.1/include gem install geoip-c