define group_log
$(if $(filter 1,$(verbose)),$(ECHO) '$(CURDIR) - $(words $1) tests')
$(foreach target,$1,$(call group_log_each,$(target),$2))
define group_log
$(if $(filter 1,$(verbose)),$(ECHO) '$(CURDIR) - $(words $1) tests')
$(foreach target,$1,$(call group_log_each,$(target),$2))