bugGNU Octave - Bugs: bug #57771, [Manual] Compiling Octave with...

 
 

bug #57771: [Manual] Compiling Octave with 64-bit indexing

Submitter:  Juan Pablo Carbajal <juanpi>
Submitted:  Sat 08 Feb 2020 12:42:15 PM UTC
 
Category:  Documentation Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Documentation
Status:  None Assigned to:  None
Originator Name:  juanpi Open/Closed:  * Open
Release:  * 5.2.0 Operating System:  * GNU/Linux
* Mandatory Fields

Add a New Comment (Rich Markup)
   

Comment Type & Canned Response:
       

 

Sat 08 Feb 2020 09:01:28 PM UTC, comment #2: 

LAPACK - Yeah, looks like the 'NOOPT' variable has been renamed to 'FFLAGS_NOOPT' recently. The docs should probably refer to either variable name, for example "the variable NOOPT or FFLAGS_NOOPT, depending on your version of LAPACK". You don't have to build LAPACK with CMake, I don't, so better to avoid mentioning CMake specific variables (users who prefer CMake probably know what they are doing).

QRUPDATE - When I build QRUPDATE for 64-bit integers, I just pass LDFLAGS as an argument to 'make' to point to wherever the custom BLAS and LAPACK libraries are.

SuiteSparse - Last time I built SuiteSparse version 4.5.5, I only need to pass 'BLAS=-lblas' as an argument to the 'make' command to get it to build the way I want. Does that work for you?

ARPACK - Sure, I ran configure with "--with-blas=blas" and "--with-lapack=lapack", and used LDFLAGS again to specify the library directory, but equivalent. I don't build with "--enable-mpi".

If you want to compare and refine your build rules, both Kai and myself have projects to build Octave and all dependencies with 64-bit Fortran integers.

Mike Miller <mtmiller>
Project Administrator
Sat 08 Feb 2020 12:54:19 PM UTC, comment #1: 

I forgot to add that for ARPACK the configure command is something like

./configure FFLAGS="-g -O2 -fdefault-integer-8" --enable-mpi --with-blas=$prefix64/lib/libblas.a --with-lapack=$prefix64/lib/liblapack.a

not only changing FFLAGS but also the libraries to use. alsoi I would mention chaging the prefix with --prefix

Additionally, should mpi be enabled? --enable-mpi

Juan Pablo Carbajal <juanpi>
Project Member
Sat 08 Feb 2020 12:42:15 PM UTC, original submission:  

Following the instructions in
https://octave.org/doc/interpreter/Compiling-Octave-with-64_002dbit-Indexing.html

I found the following

  • BLAS and LAPACK: (version 3.9.0)

   * There is no OPTS nor NOOPT variable in make.inc.example. Only FFLAGS_NOOPT, should the other variables be create? Is it enough to modify this variable?
   * Advise to change installation prefix by modifying the variable CMAKE_INSTALL_PREFIX:PATH in the CMakeCache.txt file

  • QRUPDATE: the variable to change the lib folder BLAS and LAPACK are commented as they are only needed for tests in the Makeconf file

Failure:

  • SuiteSparse: fails with -lopenblas missing. I assume it shouldn't be looking for openblas, but my recently compiled library, shouldn't the instructions say how to change the library to link with?
Juan Pablo Carbajal <juanpi>
Project Member

 

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:
   
   
Comment:
   

No files currently attached

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -email is unavailable- added by juanpi (Submitted the item)
  •  

    There are 0 votes so far. Votes easily highlight which items people would like to see resolved in priority, independently of the priority of the item set by tracker managers.

    Only project members can vote.

     

     

     

     

    No changes have been made to this item

    Back to the top


    Powered by Savane 3.9