Thanks a lot for your time, Kjell...
After this, I decided to rebuild all my Linux
system... and the problems about 'pangocairo'
disapeared; but no at all in building the last g*mm
releases, because the process broke at 'gtk+' step, as
shown below,
[...]
checking Pango flags... -pthread
-I/opt/gnome/include/pango-1.0
-I/opt/gnome/include/glib-2.0
-I/opt/gnome/lib/glib-2.0/include
-I/usr/include/freetype2 -I/opt/gnome/include/harfbuzz
-I/usr/local/include/pango-1.0
-I/usr/local/include/cairo
-I/usr/local/include/pixman-1
-I/usr/local/include/freetype2
-I/usr/include/libpng12 -L/opt/gnome/lib
-L/usr/local/lib -lpangocairo-1.0 -lpango-1.0 -lcairo
-lgobject-2.0 -lglib-2.0
checking for cairo_surface_set_device_scale... no
checking for GDK_DEP... yes
checking for ATK... no
configure: error: Package requirements (atk
atk-bridge-2.0) were not met:
No package 'atk-bridge-2.0' found
[...]
This seems strange too, because 'ATk' and 'ATkmm'
packages are already builded (& installed).