Thread: SAC on 64-bit Linux

Started: 2009-05-17 23:35:47
Last activity: 2009-05-18 00:51:12
Topics: SAC Help
Carl Tape
SAC on 64-bit Linux
2009-05-17 23:35:47
17-May-2009

Dear SAC Help:

I am having trouble using SAC libraries for a particular Fortran code. The
problem may be related to 64-bit vs 32-bit processing. Here are the details of
my situation.

uname -a
Linux denali #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009 x86_64 GNU/Linux

Computer Dell Inspiron 530
Platform Ubuntu 9.0.4

sac
SEISMIC ANALYSIS CODE [09/04/2008 (Version 101.2)]

gfortran --version
GNU Fortran (Ubuntu 4.3.3-5ubuntu4) 4.3.3

gcc --version
gcc (Ubuntu 4.3.3-5ubuntu4) 4.3.3

I see from this file
http://www.iris.edu/software/sac/SAC_History.txt
that SAC should be possible with 64 bit Linux.

And I can at least run sac and look at sac files, so something is working.

The particular Fortran code is the FLEXWIN package from CIG (I am one of the
main developers of this code):
http://www.geodynamics.org/cig/software/packages/seismo/flexwin

I used this code throughout my thesis at Caltech. Now, at Harvard on my new
setup, when I compile the code, the pertinent error message is as follows:

gfortran -O2 -Wall flexwin.f90 -o flexwin copy_float.o libmeasure2.a
-Lttimes_mod -L/opt/sac/lib -lsacio -lsac -ltau -lm
/usr/bin/ld: skipping incompatible /opt/sac/lib/libsacio.a when searching for
-lsacio
/usr/bin/ld: cannot find -lsacio
collect2: ld returned 1 exit status
make: *** [flexwin] Error 1

Qinya Liu (U. Toronto) is able to successfully compile the program with Ubuntu
but using a slightly older (32 bit?) computer and a slightly older Ubuntu
version:

Linux river #1 SMP Wed Apr 1 21:47:28 UTC 2009 i686 GNU/Linux

This led us to believe that the problem was 32-bit vs 64-bit. Is anyone aware
of this problem? Do I need to try to compile SAC from the source code on my
64-bit computer?

I would appreciate any help on this matter.

Thanks,
Carl Tape
Harvard U.
-----------


  • Chad Trabant
    Re: SAC on 64-bit Linux
    2009-05-17 21:02:22

    Hi Carl,

    The gfortran compiler should be able to build both 32 and 64-bit
    binaries. I'm guessing your compiler is defaulting to 64-bit and
    that's why it's skipping the 32-bit libsacio.a. Try adding the '-m32'
    option to the compiler arguments to build a 32-bit binary. Unless you
    need the benefits of 64-bit (possible but unlikely), a 32-bit binary
    will probably work just fine.

    It is not generally possible to compile programs with a mix of 32 and
    64-bit libraries; for a given application the constituent binary
    objects (libraries, .o files, etc.) must all be one or the other,
    otherwise the linker will complain as it did in your case. On most
    modern 64-bit operating systems their are parallel sets of system
    libraries, one 32-bit and one 64-bit. In some cases you need to
    install the 32-bit system libraries.

    regards,
    Chad

    On May 17, 2009, at 1:35 PM, Carl Tape wrote:

    17-May-2009

    Dear SAC Help:

    I am having trouble using SAC libraries for a particular Fortran
    code. The
    problem may be related to 64-bit vs 32-bit processing. Here are the
    details of
    my situation.

    uname -a
    Linux denali #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009 x86_64 GNU/
    Linux

    Computer Dell Inspiron 530
    Platform Ubuntu 9.0.4

    sac
    SEISMIC ANALYSIS CODE [09/04/2008 (Version 101.2)]

    gfortran --version
    GNU Fortran (Ubuntu 4.3.3-5ubuntu4) 4.3.3

    gcc --version
    gcc (Ubuntu 4.3.3-5ubuntu4) 4.3.3

    I see from this file
    http://www.iris.edu/software/sac/SAC_History.txt
    that SAC should be possible with 64 bit Linux.

    And I can at least run sac and look at sac files, so something is
    working.

    The particular Fortran code is the FLEXWIN package from CIG (I am
    one of the
    main developers of this code):
    http://www.geodynamics.org/cig/software/packages/seismo/flexwin

    I used this code throughout my thesis at Caltech. Now, at Harvard
    on my new
    setup, when I compile the code, the pertinent error message is as
    follows:

    gfortran -O2 -Wall flexwin.f90 -o flexwin copy_float.o libmeasure2.a
    -Lttimes_mod -L/opt/sac/lib -lsacio -lsac -ltau -lm
    /usr/bin/ld: skipping incompatible /opt/sac/lib/libsacio.a when
    searching for
    -lsacio
    /usr/bin/ld: cannot find -lsacio
    collect2: ld returned 1 exit status
    make: *** [flexwin] Error 1

    Qinya Liu (U. Toronto) is able to successfully compile the program
    with Ubuntu
    but using a slightly older (32 bit?) computer and a slightly older
    Ubuntu
    version:

    Linux river #1 SMP Wed Apr 1 21:47:28 UTC 2009 i686 GNU/Linux

    This led us to believe that the problem was 32-bit vs 64-bit. Is
    anyone aware
    of this problem? Do I need to try to compile SAC from the source
    code on my
    64-bit computer?

    I would appreciate any help on this matter.

    Thanks,
    Carl Tape
    Harvard U.
    -----------

    _______________________________________________
    sac-help mailing list
    sac-help<at>iris.washington.edu
    http://www.iris.washington.edu/mailman/listinfo/sac-help



  • Brian Savage
    Re: SAC on 64-bit Linux
    2009-05-18 00:51:12
    Carl,

    In the next couple of weeks, I hope, a new version of SAC (101.3)
    should be available which will be able to run natively on 64 bit
    machines.

    This includes a 64 bit version of the sacio library and the sac
    executable.

    Cheers
    Brian Savage

    On May 17, 2009, at 4:35 PM , Carl Tape wrote:

    17-May-2009

    Dear SAC Help:

    I am having trouble using SAC libraries for a particular Fortran
    code. The
    problem may be related to 64-bit vs 32-bit processing. Here are
    the details of
    my situation.

    uname -a
    Linux denali #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009 x86_64 GNU/
    Linux

    Computer Dell Inspiron 530
    Platform Ubuntu 9.0.4

    sac
    SEISMIC ANALYSIS CODE [09/04/2008 (Version 101.2)]

    gfortran --version
    GNU Fortran (Ubuntu 4.3.3-5ubuntu4) 4.3.3

    gcc --version
    gcc (Ubuntu 4.3.3-5ubuntu4) 4.3.3

    I see from this file
    http://www.iris.edu/software/sac/SAC_History.txt
    that SAC should be possible with 64 bit Linux.

    And I can at least run sac and look at sac files, so something is
    working.

    The particular Fortran code is the FLEXWIN package from CIG (I am
    one of the
    main developers of this code):
    http://www.geodynamics.org/cig/software/packages/seismo/flexwin

    I used this code throughout my thesis at Caltech. Now, at Harvard
    on my new
    setup, when I compile the code, the pertinent error message is as
    follows:

    gfortran -O2 -Wall flexwin.f90 -o flexwin copy_float.o libmeasure2.a
    -Lttimes_mod -L/opt/sac/lib -lsacio -lsac -ltau -lm
    /usr/bin/ld: skipping incompatible /opt/sac/lib/libsacio.a when
    searching for
    -lsacio
    /usr/bin/ld: cannot find -lsacio
    collect2: ld returned 1 exit status
    make: *** [flexwin] Error 1

    Qinya Liu (U. Toronto) is able to successfully compile the program
    with Ubuntu
    but using a slightly older (32 bit?) computer and a slightly older
    Ubuntu
    version:

    Linux river #1 SMP Wed Apr 1 21:47:28 UTC 2009 i686 GNU/Linux

    This led us to believe that the problem was 32-bit vs 64-bit. Is
    anyone aware
    of this problem? Do I need to try to compile SAC from the source
    code on my
    64-bit computer?

    I would appreciate any help on this matter.

    Thanks,
    Carl Tape
    Harvard U.
    -----------

    _______________________________________________
    sac-help mailing list
    sac-help<at>iris.washington.edu
    http://www.iris.washington.edu/mailman/listinfo/sac-help


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