Discussion related to cado-nfs

[Dennis Clarke <dclarke@blastwave.org>]

As described by Paul Zimmermann in :

https://lists.gforge.inria.fr/pipermail/cado-nfs-discuss/2019-April/001012.html


Seems reasonable to at least get cado-nfs-2.3.0 running and tested first.

However the README file is not clear.

Dropping the sources into $HOME/local/build where I also create an
out of source work and test and build dir :

    $HOME/local/build/cado-nfs-2.3.0_build_20190419151521


nix$ pwd
/home/dclarke/local/build/cado-nfs-2.3.0_build_20190419151521
nix$
nix$ ls ..
cado-nfs-2.3.0  cado-nfs-2.3.0_build_20190419151521
nix$

nix$ cmake ../cado-nfs-2.3.0 -DCMAKE_INSTALL_PREFIX=/home/dclarke/local
-- The C compiler identification is GNU 8.3.0
-- The CXX compiler identification is GNU 8.3.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
.
.
.
-- Main scripts will go to /home/dclarke/local/bin
-- Libraries and binaries will go to /home/dclarke/local/lib/cado-nfs-2.3.0
-- Data will go to /home/dclarke/local/share/cado-nfs-2.3.0
-- Configuring done
-- Generating done
-- Build files have been written to: 
/home/dclarke/local/build/cado-nfs-2.3.0_build_20190419151521
nix$

nix$ ls -lapb $HOME/local/bin
total 8
drwxr-xr-x 2 dclarke devl 4096 Apr 19 14:54 ./
drwxr-xr-x 9 dclarke devl 4096 Apr 19 14:54 ../
nix$

Nothing there of course.

nix$ cmake install
CMake Error: The source directory 
"/home/dclarke/local/build/cado-nfs-2.3.0_build_20190419151521/install" 
does not exist.
Specify --help for usage, or press the help button on the CMake GUI.
nix$

Strange.

Also this is not clear :


nix$ ./cado-nfs.py 
90377629292003121684002147101760858109247336549001090677693 -t 1
Traceback (most recent call last):
  File "./cado-nfs.py", line 43, in <module>
    import cadotask
ModuleNotFoundError: No module named 'cadotask'
nix$


So maybe I should start over and ask how does one *really* build from
the sources on a Debian Linux x86_64 box ?

Also reading the article mentioned I see what appears to be a joke on 
page two ??

    While numerical cancellations are often assumed not to occur with
    floating-point coefficients, they are very frequent with
    co-efficients in a finite field, in particular modulo 2, where
    the only non-zero value is 1 and where 1+1=0.

I will leave that for another day.


--
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken
GreyBeard and suspenders optional