[riot-notifications] [RIOT-OS/RIOT] tests/gnrc_dhcpv6_client: add script to check if $IFACE exists (#16797)

Karl Fessel notifications at github.com
Tue Sep 7 12:48:41 CEST 2021

@kfessel commented on this pull request.

I think a comment would be nice for a future reader of this Makefile

> @@ -41,7 +41,11 @@ include $(RIOTBASE)/Makefile.include
 .PHONY: dhcpv6_server
-dhcpv6_server: IFACE := ${IFACE}
+$(call target-export-variables,dhcpv6_server test-with-config/check-config,IFACE)

# export IFACE variable to environment of dhcpv6_server and test-with-config/check-config rules
$(call target-export-variables,dhcpv6_server test-with-config/check-config,IFACE)
I think this improves the understanding of this call

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