glib/gmappedfile.c: In function ‘mapped_file_new_from_fd’:
glib/gmappedfile.c:153:18: error: comparison of integer expressions of different signedness: ‘__off_t’ {aka ‘long int’} and ‘long unsigned int’ [-Werror=sign-compare]
   if (st.st_size > G_MAXSIZE)
                  ^