configure.ac:Comment out AC_CHECK_LIB([cairo]).

configure.ac

 # AC_PROG_RANLIB  # required for static librarires
 
 # Checks for libraries.
-AC_CHECK_LIB([cairo],[cairo_debug_reset_static_data],[AC_MSG_RESULT([The 'cairo' library was found.])],[AC_MSG_ERROR([The 'cairo' library was not found.])])
+# AC_CHECK_LIB([cairo],[cairo_debug_reset_static_data],[AC_MSG_RESULT([The 'cairo' library was found.])],[AC_MSG_ERROR([The 'cairo' library was not found.])])
 #TODO: add more library checks