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From: tmoran@bix.com
Subject: Re: differences in binaries
Date: 1996/10/14
Message-ID: <53tolu$ojm@news2.delphi.com>#1/1
X-Deja-AN: 189351788
organization: Delphi Internet Services Corporation
newsgroups: comp.lang.ada
Date: 1996-10-14T00:00:00+00:00
List-Id: <comp.lang.ada>


>When doing a byte-by-byte comparison of seemingly identical binaries
>(ie compile, move the resulting binary to binary.old, then compile again and compare)
>there seems to be all sorts on differences between the two files, even though
>they were only just re-linked.
>We are using SunAda 1.1 but I'm sure this occurs with other versions of Ada.
  I just tried this re-linking with Janus Ada for Windows.  It has three
steps:  compile, bind the Ada parts into a .obj file, use Microsoft's
linker to add windows stuff producing a .exe file.  A re-bind produced an
identical binary .obj file.  A relink produced an .exe that differed in
two bytes, widely separated in the .exe file.
  I don't know what might be happening in SunAda, but it clearly doesn't
'occurs with other versions of Ada'.