[Coin-discuss] Optimization level for OsiClp, bug in pack1.mps

[Alan King]

Laci -- all is forgiven, especially on a holiday.  Anyway here is the main 
point.  All compilers suck. 

All we want is the ability to set compiler directives separately from link 
directives and to run benchmarks. 

Alan



ladanyi at watson.ibm.com 
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05/28/2005 04:40 PM
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Re: [Coin-discuss] Optimization level for OsiClp, bug in pack1.mps






My mistake... I looked at Clp, not OsClp... D'oh!
Anyway, I have changed it to -O.

BTW, probably John Forrest would be the best to answer the following
philosophycal question: 
How important is it to compile OsiClp with -O? after all, the methods in 
it
should just invoke Clp, and maybe do a bunch of memory copying. And if 
both
Clp and Coin are compiled with -O, does it matter if OsiClp is compiled 
with
-g? Is there anything timeconsuming in the methods of OsiClp? (The same
question can be directed to ay other OsiXxx maintainer...)

--Laci

On Sat, 28 May 2005, Francois Margot wrote:

> >>
> >> Why is the default for compiling OsiClp set to -g instead of -O, like
> >> for all the other modules?
> >
> > I just checked it out and it's set to -O1...
> >
> 
> Call me crazy, but using a browser to the cvs repository at 14:00 EST
> Saturday, the first lines in COIN/Osi/OsiClp/Makefile are:
> 
> # Static or shared libraries should be built (STATIC or SHARED)?
> LibType := SHARED
> 
> # Select optimization (-O or -g). -O will be automatically bumped up to 
the 
> # highest level of optimization the compiler supports. If want something 
in
> # between then specify the exact level you want, e.g., -O1 or -O2
> OptLevel := -O
> OptLevel := -g
> 
> My understanding is that OptLevel will be set to -g.
> 
> Francois
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