The offical GNOME 3.16 release notes can be found at https://help.gnome.org/misc/release-notes/3.16/

Upgrade instructions for port users:

Delete the old tracker package with:
# pkg delete -f tracker
And user port upgrade tool of choice to upgrade.

Thanks to Antoine Brodin for running the exp-runs.

This release was made possible by the following people:
  Gustau Perez
  Ting-Wei_Lan

PR:		201980

(Note: The vast majority of users should never deselected docs --
These appear on the GPS IDE menu and most users are only building gtkada3
to build GPS.  But it is an option and thus needs to be supported)

While here, strip two libraries.

PR:		201137
Submitted by:	amdmi3

The transition from gcc-aux to gcc5-aux in the Ada framework has been
blocked by the inability to build gtkada3 and, once resolved, GPS (due
to tight locking with compiler).

A few days ago, Adacore made their annual release of their main libre
products, include GPS.  However, some products were tightly coupled with
the recent compilers, so in order to upgrade, the compiler had to be
switched and dependencies require many ports to be upgraded at once:

  * lang/asis
  * devel/gnatcoll
  * devel/gps
  * x11-toolkits/gtkada3
  * www/aws
  * www/aws-demos

While the version upgrades were modest in most cases (gps, gtkada3), the
amount of work put into each port was significant.  There are too many
improvements to mention here.  A few include the removal of dynamic
package lists and incorporating gnatcoll into gps to avoid building it
twice.  A private "exp-run" was done all on all 50+ Ada ports to ensure
they still build.

Also, a new argument was added to Uses/ada.mk, "run", that pulls in the
GNAT compiler as a run depends.  This was necessary for GPS that will
not launch correctly without the compiler in place.

Patch derived from gtkada-2015 released today.

The GTK/Ada library is a key component of the GNAT Programming Studio.
The GPS 5.x series used GTK2 components through GKT/Ada.  For the new
6.x series of GPS, GTK3 components are needed and GTK/Ada has been
updated accordingly.

Since GTK/Ada is actually a generic component, it has been decided to
freeze x11-toolkits/gtkada at version 2.24 as this is the last version
that supports GTK2.  To support the upcoming GPS 6.0, this gtkada3 port
based on GTK3 is required.

This port naturally conflicts with x11-toolkits/gtkada.  Once GPS is
upgraded, the gtkada port may be reworked so it can co-exist with the
gtkada port.