Workaround:
Compiling Renos Wallet in Ubuntu 16.04
fatal error: opening dependency file obj/groestl.d: No such file or directory
Create /obj folder under /src:
renos/src/obj
Also you will need obj/crypto:
renos/src/obj/crypto
mkdir obj
mkdir obj/crypto
I have found a couple of times this error just because they need this folder.
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