GZ= \
      hello

BZ2= \
      jack-exit \
      joe-exit \
      john-exit \
      bar_p-mini-lib \
      foo_s-mini-lib \
      joe_i-mini-lib \
      qux_j-mini-lib

TARBALLS=$(addsuffix .tar.gz, $(GZ)) $(addsuffix .tar.bz2, $(BZ2))

.SUFFIXES: .tar.bz2 .tar.gz

%.tar.bz2: %
	tar cvf - $< | bzip2 -z -c > $@

%.tar.gz: %
	tar cvzf $@ $<

tarballs:: $(TARBALLS)