[Linphone-users] error in make

[Rekha]

Hi All

    when i am building linphone on slackware 12 i am getting error in make

cc1: warnings being treated as errors
main.c: In function 'linphone_gtk_show_about':
main.c:353: warning: implicit declaration of function
'gtk_about_dialog_set_program_name'
make[3]: *** [main.o] Error 1
make[3]: Leaving directory `/root/linphone-3.2.0/gtk-glade'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/root/linphone-3.2.0/gtk-glade'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/root/linphone-3.2.0'
make: *** [all] Error 2

what could be the problem?

Regards
Rekha