how to do this with Makefile

[FangQ]

hi

I am writing a Makefile to convert a bdf file into different pcf files
corresponding to different unicode ranges, the striped down version of
my Makefile looks like the following

B2P=bdftopcf
SLICE=bdfmerge.pl

CJKBASIC=0x4E00--0x9FA5
CJKEXTA=0x3400--0x4DB5
CJK1=0x1100--0x11FF 0x2460--0x24EA
CJK2=0x2605--0x2606 0x262F--0x2637
CJK3=0x3105--0x312C 0x3131--0x318E

RANGE=$(CJKBASIC) $(CJKEXTA) $(CJK1) $(CJK2) $(CJK3)

cjk0: RANGE=$(CJKBASIC)
cjka: RANGE=$(CJKEXTA)
cjk: $(SLICE)
        $(SLICE) $(RANGE) $(R9).bdf  > $(R9)_cjk.bdf
        $(SLICE) $(RANGE) $(R10).bdf > $(R10)_cjk.bdf
        $(SLICE) $(RANGE) $(R11).bdf > $(R11)_cjk.bdf
        $(B2P) $(R9)_cjk.bdf  > $(R9).pcf
        $(B2P) $(R10)_cjk.bdf > $(R10).pcf
        $(B2P) $(R11)_cjk.bdf > $(R11).pcf

(the above code snip does not work, as you may notice)

what I want to do is when user make different targets, I want the
variable RANGE to change its value correspondingly. However, I don't
want to repeat the command block for each target.

I believe there must be an elegant way of doing this, i.e. set
variables differently for each target and execute a common set of
commands. However, I can not find it after an hour of search, so I hope
someone can help me up.

thank you

Qianqian