Re: Octave 3.1.51 (latest on hg) under Linux (SUSE 11.1) problem

[Khaled]

Thanks Jaroslav for your reply!

  But I don´t Know how to compile Octave using ifort!! I did not found the
suitable linking command on the internet. For example, the ifort is
installed under 

/opt/intel/Compiler/bin/intel64/ifort

and the libs are listed under

/opt/intel/Compiler/lib/intel64/

Best

Khaled



Jaroslav Hajek-2 wrote:
> 
> On Mon, Jan 5, 2009 at 12:39 PM, Khaled <address@hidden> wrote:
>>
>>  Dear Maintainers,
>>
>>  As you will realize later, I an not the kind of professional to get
>> through the developing cycle of octave. However, I was in the need for
>> the
>> generalized eigenvalue problem and the SVDS (provided by arpack).
>> Therefore,
>> I tried to compile the development source (3.1.51) yesterday!!
>>
>>  Compiling went perfect (except two issues I reported before with inv.cc
>> and CmplxQRP.cc). I tried a work around and some how it works:). I
>> already
>> compiled octave 3.0.3 (and I am still using it on my laptop) using
>> exactly
>> the same command with the same the non-commercial intel math kernel (mkl
>> 10.0.015) as follows:
>>
>> "./configure CFLAGS=-fPIC FFLAGS=-ff2c --with-blas="-lmkl -lguide
>> -lpthread
>> -lm" --with-lapack="-lmkl_lapack" --enable-64 --enable-shared
>> --enable-static --enable-bounds-check"
>>
>> I am using gfortran and I prefer not compile with ifort... however my
>> final
>> build is >>10 times slower than 3.0.3. I don't know exactly if BLAS is
>> configured as mkl or not. Even the configuration declared that it is not
>> configured as BLAS since it is not compiled with gfortran. However, the
>> configuration suggests for adding -ff2c in the compilation option, which
>> I
>> did as you see.
>>
>> 1- my first question now is: why is it much slower than ver 3.0.3 (final
>> release)!!
>>
> 
> Because MKL was not used. You have the (slow) reference BLAS, as
> indicated by configure's result.
> 
> Intel MKL is best suited to be used with ifort. It is compatible with
> gfortran, but you need to link in the Intel's runtime libraries (see
> Intel manuals).
> 
> regards
> 
> 
> -- 
> RNDr. Jaroslav Hajek
> computing expert
> Aeronautical Research and Test Institute (VZLU)
> Prague, Czech Republic
> url: www.highegg.matfyz.cz
> 
> 

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