[Octave-bug-tracker] [bug #43031] The installation documentation for Octave with 64-bit indexing doesn't mention arpack

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?43031>

                 Summary: The installation documentation for Octave with
64-bit indexing doesn't mention arpack
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Wed 20 Aug 2014 10:12:28 AM UTC
                Category: Documentation
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Documentation
                  Status: None
             Assigned to: None
         Originator Name: Johannes Zarl
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.8.2
        Operating System: GNU/Linux

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Details:

In the documentation at
http://www.gnu.org/software/octave/doc/interpreter/Compiling-Octave-with-64_002dbit-Indexing.html,
it is not mentioned that ARPACK needs to be compiled for 64-bit integers as
well.

If ARPACK is not compiled with 64-bit integers, ./configure fails to recognize
ARPACK since the check program produces a segfault (as is expected). The
diagnostic does not tell the user that there is an integer size mismatch.


Since the documentation on 64-bit indexing mentions all other libs that
require to be compiled with 64-bit integers, I would have expected ARPACK to
be mentioned as well.

Could you please add a section to the documentation like the following?


ARPACK (http://forge.scilab.org/index.php/p/arpack-ng/)
 - Add -fdefault-integer-8 to FFLAGS when running configure:
   FFLAGS="-fdefault-integer-8" ./configure
 - Run make to build the library.
 - Run make check to run some basic sanity tests (optional).
 - Run make install to install the library.






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