PKG_CHECK_MODULES([modules],[
gtk+-2.0 >= 2.16
champlain-gtk-0.3 >= 0.3.3
champlain-gtk-0.4 >= 0.4
champlain-0.3 >= 0.3.3
champlain-0.4 >= 0.4
gmodule-2.0
libxml-2.0
])