Compiler Optimization Flags Used in HPCC

Wong, Stephen Stephen.Wong at
Fri Aug 13 16:56:32 UTC 2010

Hi Lucas, all,

We are using the HPCC suite for internal evaluation, basically just doing due diligence to understand the binary (we'll build from source also).

You might be aware of the case where Intel compilers can produce binaries that are not optimal for AMD processors (it was discovered in a lawsuit). But mostly I'm just concerned with how it's built for internal reasons.


-----Original Message-----
From: Lucas Nussbaum [mailto:lucas at] 
Sent: Friday, August 13, 2010 11:32 AM
To: Wong, Stephen
Cc: Sylvestre Ledru; debian-science-maintainers at
Subject: Re: Compiler Optimization Flags Used in HPCC

On 13/08/10 at 01:27 +0200, Sylvestre Ledru wrote:
> Hello,
> Le jeudi 12 août 2010 à 13:55 -0500, Wong, Stephen a écrit :
> > Hi all,
> > 
> >  
> > 
> > I was not able to find this information through searches: for the HPCC
> > binary (version 1.4.0-1 and 1.4.1-1, both for amd64), what compiler
> > optimizations were used to compile the binary?
> You have access to all build log on this URL:
> For i386, I would say:
> -DHPL_CALL_CBLAS -I../../../include -I../../../include/Debian
> -fomit-frame-pointer -O3 -funroll-loops -W -Wall
> See:

For amd64, since it was built by the Debian maintainer (me) before the upload, the
log is not available. But you should be able to rebuild it from source,
and see it yourself.

May I ask why you are interested in that?

- Lucas

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