($(srcdir)/m4/jm-glibc-io.m4): Use mv, not move-if-change.
# -*- makefile -*-
## Customize Makefile.maint.
-move_if_change = move-if-change
-
# List the hosts to which test releases are copied.
# `a' and `b' are merely placeholders, and correspond to the
# `a_' and `b_' prefixes of the following variables.
-e 's/@space_separated@/$(unlocked_io_functions)/g' \
-e 's/@comma_separated@/$(comma_separated)/g' \
$< >> $(t_io)
- $(move_if_change) $(t_io) $@
+ mv $(t_io) $@