Ghostscript 10.03.1 and later disable the "makeimagedevice" operator
when running under -dSAFER. Even --permit-devices='*' isn't enough to
get it back. The release notes say that makeimagedevice has been
removed entirely, but that seems not to be correct.
# Dependency of all of OTFFILES could be narrowed to just the relevant
# one.
%.bdf: %.bdf.ps $(OTFFILES) Fontmap
- gs -P -q -dSAFER --permit-file-write=$@ -dNODISPLAY -dBATCH -- $< $@
+ gs -P -q -dNOSAFER -dNODISPLAY -dBATCH -- $< $@
%.otf: %.ttx
ttx --no-recalc-timestamp -o $@ $<