libaio and man-pages have conflicting files. /usr/share/man/man3/aio_cancel.3.gz /usr/share/man/man3/aio_return.3.gz /usr/share/man/man3/aio_error.3.gz /usr/share/man/man3/aio_suspend.3.gz /usr/share/man/man3/aio_fsync.3.gz /usr/share/man/man3/aio_write.3.gz /usr/share/man/man3/aio_read.3.gz
resolved with newer man-pages.