предупреждение о конфигурации шрифта [дубликат]

когда я делал программу c в Ubuntu 12.04, терминал выводил предупреждение о конфигурации шрифта. Что мне делать ?

shayna@shayna-Vostro-3446:~$ gedit hello6.c
Fontconfig warning: "/etc/fonts/conf.d/89-tlwg-garuda-synthetic.conf", line 9: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/89-tlwg-garuda-synthetic.conf", line 21: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/89-tlwg-kinnari-synthetic.conf", line 9: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/89-tlwg-kinnari-synthetic.conf", line 21: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/89-tlwg-loma-synthetic.conf", line 12: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/89-tlwg-umpush-synthetic.conf", line 9: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/89-tlwg-umpush-synthetic.conf", line 21: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 9: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 22: Having multiple <family> in <alias> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 22: Having multiple <family> in <alias> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 22: Having multiple <family> in <alias> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 26: Having multiple <family> in <alias> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 31: Having multiple values in <test> isn't supported and may not works as expected
Fontconfig warning: "/etc/fonts/conf.d/90-fonts-nanum.conf", line 40: Having multiple values in <test> isn't supported and may not works as expected
shayna@shayna-Vostro-3446:~$ gcc hello6.c -o hello6
shayna@shayna-Vostro-3446:~$ ./hello6
shayna@shayna-Vostro-3446:~$