$(BUILDDIR)/%.d: %.cpp | $(BUILDDIR)
    $(CXX) $(CXXFLAGS) -MM -MT $(@:.d=.o) $< > $@

SOMEVAR:=hello

test:
    echo ${SOMEVAR}
    echo $SOMEVAR
    echo $(SOMEVAR:hello=world)
    echo $($SOMEVAR:hello=world)

echo hello
echo OMEVAR
echo world
echo