> .for file in ${MYFILES}${n::=n}
> 	cp ${file} dir/${file}${n:[#]}${n::=$n n}
> .endfor

Ah!  I wasn't aware of :[#].  I thought of counting in base 1, but
didn't know of any way to get the length of a variable.

I'll have to remember that.

Though - after seeing the remark about how this was for a cross-build
Makefile - I'm not sure that'll be portable enough.

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