Re: [ptxdist] weird ptxdist -q -j go problems

[Michael Olbrich <m.olbrich@pengutronix.de>]

Hi,

On Sun, Feb 25, 2018 at 01:02:58PM +0100, Erwin Rol wrote:
> On Sun, 2018-02-25 at 12:43 +0100, Michael Olbrich wrote:
> > > The build system is Centos7 with bash;
> > > GNU bash, version 4.2.46(2)-release (x86_64-redhat-linux-gnu)
> > > 
> > > Not the newest but on the other hand Centos7/RHEL7 is a very stable
> > > platform. It would be very nice if it could be part of the list of
> > > platforms Pengutronix uses to test ptxdist ;-)
> > 
> > I run build tests in several different chroots and Centos7 is one of them.
> > Unfortunately that one is currently broken, because it's missing Python 3.4
> > needed for meson :-/.
> 
> install devtoolset-6, this is what I install in my centos7 docker;
> 
> RUN \
>     echo 'Upgrading all system packages to the latest available versions' >&2 && \
>     yum -y install epel-release && \
>     yum -y install centos-release-scl && \
>     yum -y install devtoolset-6 && \
>     yum -y update
>     
> RUN \
>     echo 'Installing host tools and build system functionality' >&2 && \
>     yum -y install \
[...]

Thanks for the hint. I know that there are multiple ways to install Python
3.4 on Centos7 but I wasn't sure which one I should use. Picking one that
someone already uses in combination with PTXdist sounds like a good idea.
Now I just need to find the time to properly integrate this...

> > Some packages using glib also need host-glib for some of the helper tools
> > like glib-mkenums.
> > 
> > Can you send a patch? And please include the reason in the commit message.
> > Or the build error if it's useful. That helps while reviewing the
> > dependencies for the next update.
> 
> I will have to break it again to get the error msg :-) I'll see if I
> find some time later today.

That would be great, thanks.

> > > BTW: wouldn't it be easier to add select HOST_GLIB to glib.in ? Or even
> > > more general do that for all packages that have a host-* version ?
> > 
> > Not all packages that use glib actually need host-glib and I'd like to
> > avoid unnecessary dependenciesa.
> 
> I'll see if I can find some time to do  
> ./ptxdist clean; ./ptxdist compile pkg_that_uses_glib 
> to see what builds and waht doesn't.
> 
> Of course that is going to cost a lot of build time, so it might take a
> while to get done.

I know. It makes systematic tests like this difficult.

> > > I'll look into it and report back when I know more, certainly now I
> > > know -j really is a first class citizen :-)
> > 
> > I've spent quite some time to make '-j' work without problems and as fast
> > as possible without overloading the build server. All my ptxdist build
> > tests use it. I's most definitely a first class citizen.
> 
> That is good, cause those "configure" stages take for ever :-) 

Exactly, and when I combined -jiX with -jeX then my colleagues complained
when the compile jobs overloaded the build server. So I started looking for
a solution and came up with the mechanism behind -j.

Michael

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