upgrading python on raspbian
On Sunday 13 October 2019 16:22:33 Chris Angelico wrote:
> On Mon, Oct 14, 2019 at 6:38 AM Gene Heskett <gheskett at shentel.net>
> > I'm not a python expert by a long ways.
> > I have built the linuxcnc-master, which is the development branch of
> > linuxcnc, a machine control program to run most metal carving
> > machines. Lathes, milling machines, anything you can motorize,
> > LinuxCNC can run.
> > This requires a preempt-rt kernel which I've managed to build and
> > install, all on a pi-4b running raspbian buster, the armfh-v7l
> > version of debian 10.1.
> > But linuxcnc is quite elderly code, some of it going back to before
> > there was a linux, so despite being actively developed right now for
> > x86 type hardware but has quite a list of missing dependencies I
> > cannot satisfy from the raspbian repos.
> > They are:
> > The following packages have unmet dependencies:
> > linuxcnc-uspace : Depends: python2.7-glade2 but it is not
> > installable or
> > Can anyone supply a list of python3 packages that will cover the
> > functions contained in the above list?, and I will attempt to edit
> > the linuxcnc srcs to use the more modern code base?
> So if I understand you correctly, you're not worried about actually
> supplying these apt packages, but you want equivalents so you can port
> the code itself to Py3?
I think thats the obvious path forward. Once ported, we don't have to
worry about that legacy stuff for two or 3 generations of linux. I have
it building on raspbian buster-10.1 for a rpi4b right now in "uspace"
mode, but missing stuff has cost us a couple of the pretty gui-faces we
use with it, and I'd like to find a way around that if I could.
> My recommendation would be to start with "sudo apt build-dep
> linuxcnc-uspace" and see if it can get any, but otherwise, just
> replace "python-" with "python3-" and see if that works. You may need
> to dig up dev packages of them though.
The 2 packages that are missing right now are python-gtksourceview2, and
python-vte. Do they have python3 equ's? Finding python3 replacements
for those 2 would take some pressure off its forward march.
as far as build dep detection, dpkg-checkbuilddeps is as dumb as a rock.
I've had to add at least ten packages now to get it to build, that were
never detected by dpkg-checkbuilddeps. And its major stuff, like
inkscape and imagemagick. checkbuilddeps is ok before a 1st build,
finding 50 or so things it needed, but for major stuff, a waste of time
after the first session.
> Another option may be to just use pip to install your dependencies.
> That might work out easier.
There seems to be an underground effort to throw pip and pip3 under the
bus of late. I'm wonder why?
Cheers, Gene Heskett
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Genes Web page <http://geneslinuxbox.net:6309/gene>