ubuntu - Gtk toolbar looking strange -

ubuntu - Gtk toolbar looking strange -

i utilize c programme gtk gui. works, on computer has toolbar : on other bad toolbar ( little buttons without text) :

some check :

dpkg -l libgtk* | grep -e '^i' | grep -e 'libgtk-*[0-9]'

output :

ii libgtk-3-0:amd64 3.8.6-0ubuntu3.1 amd64 gtk+ graphical user interface library ii libgtk-3-bin 3.8.6-0ubuntu3.1 amd64 programs gtk+ graphical user interface library ii libgtk-3-common 3.8.6-0ubuntu3.1 mutual files gtk+ graphical user interface library ii libgtk-3-dev 3.8.6-0ubuntu3.1 amd64 development files gtk+ library ii libgtk2-perl 2:1.247-2 amd64 perl interface 2.x series of gimp toolkit library ii libgtk2.0-0:amd64 2.24.20-1ubuntu1 amd64 gtk+ graphical user interface library ii libgtk2.0-bin 2.24.20-1ubuntu1 amd64 programs gtk+ graphical user interface library ii libgtk2.0-common 2.24.20-1ubuntu1 mutual files gtk+ graphical user interface library ii libgtk2.0-dev 2.24.20-1ubuntu1 amd64 development files gtk+ library

what reason ?

tia

claude have found solution :

gtk_toolbar_set_style(gtk_toolbar(tbar), gtk_toolbar_text);

now works.

ubuntu gtk toolbar