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Date: Mon, 29 Apr 2013 15:44:34 +0200
From: magnum <>
Subject: Re: GPU support under Windows

On 29 Apr, 2013, at 14:59 , Dániel Bali <> wrote:
> I tried to create a list of plugins/libraries that need to be installed for cygwin to be able to compile JtR with OpenCL.
> I started with a clean clone of the bleeding-jumbo repository and a clean Cygwin installation (only installed gcc, make, libgcc1 and openssl-devel). I was really happy to see that the new makefile rule is in the repository already. However this time I got an error that I haven't seen before:
> blake2b_plug.c: In function `blake2b_compress':
> blake2b_plug.c:292: warning: dereferencing type-punned pointer will break strict-aliasing rules
> blake2b_plug.c:296: warning: implicit declaration of function `_mm_set_epi64x'

Did you by any chance uncomment the "OMPFLAGS = -fopenmp" line? If so, try the one below instead, saying "OMPFLAGS = -fopenmp -msse2". I never understood why that is needed for some targets despite they already say -msse2 elsewhere.


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