owl-base

OCaml Scientific and Engineering Computing - Base
README

Owl is a dedicated system for scientific and engineering computing in the
functional programming language OCaml.

This software is currently maintained by Komposio, a
Helsinki-based software consulting company.

Visit the project website at ocaml.xyz

Optional features

You can enable optional features by setting the following variables to 1
before compilation:

  • OWL_ENABLE_EXPMODE=1: turn on experiment features like -flto

  • OWL_ENABLE_DEVMODE=1: turn on all the warnings in development

  • OWL_ENABLE_OPENMP=1: turn on OpenMP support in core module and
    the automatic parameter tuning (AEOS)

  • OWL_CFLAGS allows to change the default flags passed to the C targets,
    it defaults to

    OWL_CFLAGS="-g -O3 -Ofast -march=native -mfpmath=sse -funroll-loops -ffast-math -DSFMT_MEXP=19937 -msse2 -fno-strict-aliasing -Wno-tautological-constant-out-of-range-compare"`
    
  • OWL_AEOS_CFLAGS allows to change the default flags passed to the C targets
    when compiling AEOS. It defaults to

    OWL_AEOS_CFLAGS="-g -O3 -Ofast -march=native -funroll-loops -ffast-math -DSFMT_MEXP=19937 -fno-strict-aliasing"
    
  • OWL_DISABLE_LAPACKE_LINKING_FLAG=1 disables the -llapacke flag in the
    linking options. This is useful when you have lapacke installed on
    non-standard localtion.

If you are not using opam, you should run make clean before recompiling
the library after having changed any of those environment variables.

For examples of use of this feature, you can refer to the Docker.ubuntu
and Docker.ubuntu.arm docker files, or to the snippet in
https://github.com/owlbarn/owl/issues/394#issuecomment-471364916
(which also shows how to use it within esy).

Troubleshooting

A common source of frustration when installing owl is the possible appearence of linking errors (see for example https://github.com/owlbarn/owl/issues/450).
This usually happens when installing owl on ubuntu (where it depends on how openblas is complied and packaged), but could happen in other distributions (see for example https://discuss.ocaml.org/t/owl-undefined-symbols-after-standard-installation/4186/13).
The only way we could solve those issues is to recompile openblas and install it manually. You can see how we do it by looking at the Docker files in the repository: https://github.com/owlbarn/owl/blob/master/docker/Dockerfile.ubuntu

Install
Published
17 Nov 2019
Authors
Sources
owl-0.7.0.tbz
sha256=cb9b596d7a2166630e385381f5dcb7cc6c2a4afebd32b2811db3e4b4fe008f3c
sha512=940c0953ee3fce453787e0820df42f4f3852413ba0a1af9d18af128d90a76bf9c93aaa3af42bd80be938b0b53ed0f546a1972ecc5fad7dd35247cea5e699b78f
Dependencies
Reverse Dependencies
gobba
>= "0.4.2"
owl
= "0.7.0"
owl-ode-base
< "0.3.0"