Re: 3.2.0 release candidate 5: problems with blas/lapack

[Jean-Francois Cardoso]

Jaroslav Hajek-2 wrote:
> 
> On Tue, Jun 2, 2009 at 10:30 PM, Jean-Francois Cardoso <address@hidden>
> wrote:
>>
>> Hello Jaroslav,
>>
>> I have problem building all 3.2.0 release candidates.
>> The configure script does not detect properly the
>> BLAS libraries.  This is happening on two machines of mine:
>>
>> 1) on my MacBook where ./configure spills out:
>>
>> [...]
>> checking whether DDOT is called correctly from Fortran... yes
>> checking whether CDOTU is called correctly from Fortran... no
>> checking whether ZDOTU is called correctly from Fortran... yes
>> configure: WARNING: A BLAS library was detected but found incompatible
>> with
>> your Fortran 77 compiler.
>> [...]
>>
>> 2) on a Linux/Intel machine when I try to link with Intel's MKL.
>>
>> Again, BLAS detection fails on CDOTU.
>>
>>
>> On both machines, I am able to compile successfully the 3.0.xx series,
>> that is with proper detection of the local multithreaded BLAS libraries.
>>
>> Cheers, JF
> 
> This is most likely happening if your Fortran compiler uses a calling
> convention incompatible to your BLAS/LAPACK.
> For instance, if you try to use gfortran + g77-compiled BLAS or vice
> versa. Such an incompatibility can cause mysterious problems, that's
> why this check was added.
> If you're sure this is not the case, then please supply your config.log.
> 
> 

Thanks for your reply.
The blas detection problem is solved by adding a -ff2c switch.
I have unfortunately no idea how my libraries are compiled.
On Linux, I try to link to a prebuilt MKL library.
On MacOSX, I try to link to the native BLAS (Veclib, in Mac speech).
On both systems, I had no problems with octave 3.0.xx.
Now, with ff2c, Linux+MKL seems to work fine.  However,
on MacOSX, the build completes but there are several test failures
which appear in sections unrelated to the BLAS.  Those are:

  src/ov-struct.cc ....................................... PASS    9/16  
FAIL 7
  src/pt-idx.cc .......................................... PASS    3/5   
FAIL 2
  scripts/miscellaneous/getfield.m ....................... PASS    1/2   
FAIL 1
  scripts/miscellaneous/orderfields.m .................... PASS    0/5   
FAIL 5
  scripts/miscellaneous/setfield.m ....................... PASS    1/2   
FAIL 1
  test_struct.m .......................................... PASS   38/44  
FAIL 6

The build script is as follows:
================================
export CPPFLAGS="-I/usr/local/include/readline"
export LDFLAGS="-L/usr/local/lib"
export FFLAGS="-ff2c" ; ## for octave 3.2.0 
###   Where has gcc_select gone ?
export CC=gcc-4.2
export CPP=cpp-4.2
export CXX=g++-4.2
export CXXCPP=cpp-4.2 ##  
./configure 
make -j2
================================
The fortran compiler is gfortran 4.4.0
All libraries are native (except a locally compiled readline)
to an uptodate OSX 10.5.7 system.

Let me know if I can help by providing (portions of) log files
for the above test failures (I am reluctant to post
fntests.log or config.log which are large files).

Cheers, JF

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