Re: Diff Tools

"Richard Norman" <>
27 Mar 2001 23:22:08 -0500

          From comp.compilers

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From: "Richard Norman" <>
Newsgroups: comp.compilers
Date: 27 Mar 2001 23:22:08 -0500
Organization: Compilers Central
References: 01-03-121
Keywords: tools, linker
Posted-Date: 27 Mar 2001 23:22:08 EST

<> wrote
> I've encountered a documented problem within Visual C++, that the
> same code will produce different sized executables, when compiled at
> different times or on different machines.
> Now, the problem is, my company wants to be able to see the
> differences between these two executables. If they are just time/date
> stamps, that's fine, but if there is other stuff (memory contents,
> etc) there may be problems, and we have to be able to determine that.
> We'd like a more programmatic way of doing this then using a hex
> editor, but any suggestions are helpful.

Same sized executables differing in a few bytes are a time code. You
can see the difference using the DOS command line fc utility (file

Different size executables are a different problem. These are likely
to involve different compilation or linkage switches, different
library versions, or, to be quite frank, differences in source code.
You can't be sure that these really represent the same code and your
company is correct to be concerned.

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