Which libraries are required on Mac OSX for kgio gem installs?

[Craig Flannagan <cflannagan@zvrs.com>]

This is on Mac OSX, Snow Leopard. This is the error message I am getting - and I have been unable to figure exactly which libraries is required so the kgio gem install can be successful. I have googled, looked at stackoverflow.com, etc and it does not seem like this error is really widespread or common, so I cannot find any immediate solution online using search functions. Any ideas what is wrong here? Thanks in advance!

(I am also getting same results for kgio gem version 2.3.2, 2.41, 2.42, by the way).


Installing kgio (2.6.0) with native extensions /usr/local/lib/ruby/site_ruby/1.8/rubygems/installer.rb:551:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

        /usr/local/bin/ruby extconf.rb 
checking for CLOCK_MONOTONIC in time.h... no
checking for CLOCK_MONOTONIC() in time.h... no
checking for clockid_t in time.h... no
checking for clock_gettime() in -lrt... no
checking for t_open() in -lnsl... no
checking for socket() in -lsocket... no
checking for poll() in poll.h... no
checking for getaddrinfo() in sys/types.h,sys/socket.h,netdb.h... no
getaddrinfo required
*** 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.

Provided configuration options:
	--with-opt-dir
	--without-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/usr/local/bin/ruby
	--with-rtlib
	--without-rtlib
	--with-nsllib
	--without-nsllib
	--with-socketlib
	--without-socketlib


Gem files will remain installed in /Users/craigflannagan/.bundler/tmp/19497/gems/kgio-2.6.0 for inspection.
Results logged to /Users/craigflannagan/.bundler/tmp/19497/gems/kgio-2.6.0/ext/kgio/gem_make.out