[MacPorts] #61723: gdl3 at 3.34.0: error: implicit declaration of function 'gdl_dock_object_class_set_is_compound'

[MacPorts]

#61723: gdl3 at 3.34.0: error: implicit declaration of function
'gdl_dock_object_class_set_is_compound'
-------------------------------+--------------------
 Reporter:  A-Petrov-atweb-su  |      Owner:  (none)
     Type:  defect             |     Status:  new
 Priority:  Normal             |  Milestone:
Component:  ports              |    Version:
 Keywords:                     |       Port:
-------------------------------+--------------------
 Seems port needs to be adopted for building under XCode 12.x/Big Sur
 environment.
 {{{
 :debug:sysinfo macOS 11.0 (darwin/20.1.0) arch i386
 :debug:sysinfo MacPorts 2.6.4
 :debug:sysinfo Xcode none
 :debug:sysinfo SDK 11.0
 :debug:sysinfo MACOSX_DEPLOYMENT_TARGET: 11.0
 ---//---
 :info:build mv -f .deps/gdl-dock-master.Tpo .deps/gdl-dock-master.Plo
 :info:build mv -f .deps/gdl-dock-object.Tpo .deps/gdl-dock-object.Plo
 :info:build gdl-dock-item.c:358:5: error: implicit declaration of function
 'gdl_dock_object_class_set_is_compound' is invalid in C99 [-Werror
 ,-Wimplicit-function-declaration]
 :info:build     gdl_dock_object_class_set_is_compound (object_class,
 FALSE);
 :info:build     ^

 }}}
 here is a lot of other ports affected with the new XCode12 limitation with
 the same 'implicit declaration of function' messages. Tickets for example:
 #61696, #61036, #61278 and so on

-- 
Ticket URL: <https://trac.macports.org/ticket/61723>
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