Re: [eigen] GitLab migration is starting now! yade is on gitlab too!

["Janek Kozicki (yade)" <jkozicki-yade@xxxxxxxxx>]

Joel Holdsworth said:     (by the date of Thu, 5 Dec 2019 18:41:05 +0000)

> Should Eigen be pre-built as a PCH? I would imagine that could speed 
> things up  a lot.


I experimented with precompiled headers. It is not worth the hassle.
Especially because sometimes gcc does not recognize that they are out
of date, which resulted in super-weird build errors. I found out that
ccache is much more robust and reliable.



> On 12/5/19 6:36 PM, Janek Kozicki (yade) wrote:
> > Hi,
> > 
> > I am developer of YADE, https://gitlab.com/yade-dev and I want to add
> > high precision support in our entire codebase. Unfortunately I have
> > been getting eigen segfaults in my tests. More about that in another email.
> > 
> > I want to talk a little about your gitlab migration :)
> > 
> > I use libeigen since roughly 2007. That's the first time however when
> > I need to fix something in libeigen, and I can't do that without a
> > working CI. The simplest compilation in gitlab-CI pipeline for me is
> > to use the debian build scripts. And I created a
> > super-simple .gitlab-ci, just to see a working pipeline:
> > 
> > https://gitlab.com/cosurgi/eigen/merge_requests/1
> > https://gitlab.com/cosurgi/eigen/pipelines/100984912
> > 
> > All tests passed (around line 3480):
> > https://gitlab.com/cosurgi/eigen/-/jobs/370818226#L3481
> > 
> > you might want to have a look at eiher that small simple .gitlab-ci
> > in that branch, or the full-blown .gitlab-ci which I use in yade all
> > the time:
> > 
> > https://gitlab.com/yade-dev/trunk/blob/master/.gitlab-ci.yml
> > https://gitlab.com/yade-dev/trunk/pipelines/100789929
> > 
> > I am using ccache for yade compilation, it speeds up things really a
> > lot. I did the same thing in that small .gitlab-ci which I prepared for my
> > tests of libeigen.
> > 
> > I triggered a second libeigen compilation. The first one took 1hour. The
> > second one, thanks to ccache took only 14 minutes:
> > 
> > https://gitlab.com/cosurgi/eigen/pipelines/100999796
> > https://gitlab.com/cosurgi/eigen/pipelines
> > 
> > best regards
> > Janek Kozicki
> > 
> > 
> > 
> 
> 
> 


-- 
--
Janek Kozicki, PhD. DSc. Arch. Assoc. Prof.
Gdańsk University of Technology
Faculty of Applied Physics and Mathematics
Department of Theoretical Physics and Quantum Information
--
http://yade-dem.org/
http://pg.edu.pl/jkozicki (click English flag on top right)