case "$gtkmm_enable_warnings" in
none|no) gtkmm_warning_flags='';;
minimum|yes) gtkmm_warning_flags='-Wall -Wno-unused-parameter';;
case "$gtkmm_enable_warnings" in
none|no) gtkmm_warning_flags='';;
minimum|yes) gtkmm_warning_flags='-Wall -Wno-unused-parameter';;