Hello, newer version of GTK+ 3 deprecated some header files, such as "gtkactiongroup.h" which is needed to build this package. This FTBFS can be fixed by just removing options -DGTK_DISABLE_DEPRECATED in src/Makefile.am. I'm pretty new in the Debian world, I added the patch as attachment, hoping it is not bad-written.
Regards, Domenico Iezzi.
--- a/src/Makefile.am +++ b/src/Makefile.am @@ -12,7 +12,6 @@ -DINDICATOR_ICONS_DIR=\""$(INDICATORICONSDIR)"\" \ -DINDICATOR_APPLET \ -DGDK_DISABLE_DEPRECATED \ - -DGTK_DISABLE_DEPRECATED \ -I$(srcdir)/.. \ $(APPLET_CFLAGS) @@ -33,7 +32,6 @@ -DINDICATOR_ICONS_DIR=\""$(INDICATORICONSDIR)"\" \ -DINDICATOR_APPLET_APPMENU \ -DGDK_DISABLE_DEPRECATED \ - -DGTK_DISABLE_DEPRECATED \ -I$(srcdir)/.. \ $(APPLET_CFLAGS) @@ -54,7 +52,6 @@ -DINDICATOR_ICONS_DIR=\""$(INDICATORICONSDIR)"\" \ -DINDICATOR_APPLET_SESSION \ -DGDK_DISABLE_DEPRECATED \ - -DGTK_DISABLE_DEPRECATED \ -I$(srcdir)/.. \ $(APPLET_CFLAGS) @@ -75,7 +72,6 @@ -DINDICATOR_ICONS_DIR=\""$(INDICATORICONSDIR)"\" \ -DINDICATOR_APPLET_COMPLETE \ -DGDK_DISABLE_DEPRECATED \ - -DGTK_DISABLE_DEPRECATED \ -I$(srcdir)/.. \ $(APPLET_CFLAGS)