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

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

I didn't try a build-server run. I first tried pch for development,
thinking it was easier to setup than ccache (later it turned out I
was wrong, ccache is easier). Then I was hit by these
super-weird build errors and I moved to ccache.
I never looked back.


Joel Holdsworth said:     (by the date of Thu, 5 Dec 2019 19:12:16 +0000)

> Even for a build-server test run? I agree it's not so useful for 
> development.
> 
> On 12/5/19 6:47 PM, Janek Kozicki (yade) wrote:
> > 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)