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Re: always producing the same object code...
- From: Dave Airlie <airlied at csn dot ul dot ie>
- To: Oliver Kullmann <O dot Kullmann at Swansea dot ac dot uk>
- Cc: Dave Airlie <airlied at linux dot ie>, gcc-help at gcc dot gnu dot org
- Date: Wed, 19 Mar 2003 22:15:38 +0000 (GMT)
- Subject: Re: always producing the same object code...
- References: <Pine.LNX.4.53.0303190546420.20641@skynet> <20030319122811.GA2859@swan.ac.uk>
>
> Hi,
>
> do you mean that the compiler always produces the same object *code*?!
> Or do you mean, that the *behaviour* of the running program is always
> exactly the same?
the first one .. with a known compiler version and known source code, I
can produce an executable that has the same MD5 checksum (or CRC) as an
executable generated at a previous time by the same compiler and source
code, the option on guessing branch probabilities seems to suggest that
this won't happen for me unless I switch this off and I'm wondering if
there are more options like this that I need to know about,
Dave.
--
David Airlie, Software Engineer
http://www.skynet.ie/~airlied / airlied at skynet dot ie
pam_smb / Linux DecStation / Linux VAX / ILUG person