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Date: Sat, 30 Jul 2011 19:49:51 +0400
From: Solar Designer <>
Subject: Re: Compiling john 1.7.8 jumbo under Windows XP+cygwin

On Sat, Jul 30, 2011 at 11:45:29AM -0400, madfran wrote:
> I am trying to compile the jumbo release of john 1.7.8 under XP (with patch 
> applied) and cygwin (updated), without success.
> It seems some problems with libssl.
> I tried to update the openssl package for cygwin and I had always the same 
> message.
> /usr/local/ssl/lib/libssl.a(ssl_err2.o):ssl_err2.c:(.text+0x4): undefined 
> reference to `_ERR_load_crypto_strings'
> /usr/local/ssl/lib/libssl.a(ssl_ciph.o):ssl_ciph.c:(.text+0x1cb): undefined 
> reference to `_COMP_zlib'

It looks like your libssl is linked with libz, so you need to add -lz to
LDFLAGS.  Does this help?

If so, I wonder why others are apparently not experiencing the same
problem with builds on Cygwin.


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