tests-macbook:paydium mark$ sudo port install glib2 @2.0
--->  Fetching glib2
--->  Verifying checksum(s) for glib2
--->  Extracting glib2
--->  Applying patches to glib2
--->  Configuring glib2
--->  Building glib2
--->  Staging glib2 into destroot
--->  Installing glib2 @2.20.0_1
--->  Activating glib2 @2.20.0_1
--->  Cleaning glib2



tests-macbook:paydium mark$ sudo gem install ruburple
Password:
Building native extensions.  This could take a while...
ERROR:  Error installing ruburple:
	ERROR: Failed to build gem native extension.

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
checking for pkg-config... yes
checking for main() in -lglib-2.0... no
*** 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=/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
	--with-glib-2.0lib
	--without-glib-2.0lib
--------------------------------------------------
 extconf failure: libglib-2.0 needed
--------------------------------------------------