Pidgin depends on GTK+ 2.14.7 (newer runtime versions can be used).
The GTK+ All-in-one bundle contains all of GTK+'s dependencies in one zip file.
Visit the [http://www.gtk.org/download-windows.html GTK+ website] for official binary and source releases.
You'll need gettext to compile translations. Download [https://sourceforge.net/projects/gnuwin32/files/gettext/0.14.4/gettext-0.14.4-dep.zip/download gettext-0.14.4-dep.zip] and [https://sourceforge.net/projects/gnuwin32/files/gettext/0.14.4/gettext-0.14.4-bin.zip/download gettext-0.14.4-bin.zip]. Extract both to `win32-dev/gtk_2_0`.
You'll need gettext to compile translations. Download [https://sourceforge.net/projects/gnuwin32/files/gettext/0.14.4/gettext-0.14.4-dep.zip/download gettext-0.14.4-dep.zip] and [https://sourceforge.net/projects/gnuwin32/files/gettext/0.14.4/gettext-0.14.4-bin.zip/download gettext-0.14.4-bin.zip]. Extract both to `win32-dev/gtk_2_0-2.14`.