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

[Mike Miller]

Follow-up Comment #2, bug #57771 (project octave):

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.

* https://gitlab.com/mtmiller/octave-blas64-builder
* https://github.com/octave-de/GNU-Octave-enable-64


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