title: GTK+ installation
body: <p>I am using ubuntu 12.10. I have CODE:Blocks IDE.
  I want to use gtk+ but when i create a project and build it it says it cannot find gtk.h file.</p>
  
  <p>I downloaded gtk+, glib, pango, gdk-pixbuf and atk by writing </p>
  
  <pre><code>git clone git://git.gnome.org/gtk+, 
  git clone git://git.gnome.org/glib
  
  ...
  </code></pre>
  
  <p>then i unzipped all libraries. every thing was fine unti here.</p>
  
  <p>To install gtk+ i write "./configure --prefix=/opt/gtk"
  it starts processing, most of the process goes OK, but then it comes with an error</p>
  
  <pre><code>...
  checking for some Win32 platform... no
  checking whether build environment is sane... yes
  checking for pkg-config... /usr/bin/pkg-config
  checking pkg-config is at least version 0.9.0... yes
  checking for BASE_DEPENDENCIES... no
  configure: error: Package requirements (glib-2.0 &gt;= 2.33.1    atk &gt;= 2.5.3    pango &gt;= 1.30.0    cairo &gt;= 1.10.0    cairo-gobject &gt;= 1.10.0    gdk-pixbuf-2.0 &gt;= 2.26.0) were not met:
  No package 'glib-2.0' found
  No package 'atk' found
  No package 'pango' found
  No package 'cairo' found
  No package 'cairo-gobject' found
  No package 'gdk-pixbuf-2.0' found
  Consider adjusting the PKG_CONFIG_PATH environment variable if you
  installed software in a non-standard prefix.
  Alternatively, you may set the environment variables BASE_DEPENDENCIES_CFLAGS
  and BASE_DEPENDENCIES_LIBS to avoid the need to call pkg-config.
  See the pkg-config man page for more details.
  </code></pre>
  
  <p>I tried to install other libraries by writing ./configure in their directory. But it could not file configure file. </p>
  
  <p>I set <code>PKG_CONFIG_PATH</code> but it does not work anyway</p>
  
  <p>How can I install it?</p>