----- Original Message ----- > From: "Joshua Kramer" <[email protected]> > To: "Charalampos Stratakis" <[email protected]>, [email protected] > Sent: Saturday, June 9, 2018 4:47:43 PM > Subject: Re: [scl.org] rh-python36 SPEC file question (circular dependency) > > > Long story short: > > 1. Build python with rehweel set to 0. > ..... > > I got further with these steps, but there are some omissions. I > attempted to build python.spec as the first step (after setting > with_rewheel to 0), but it complained about a missing dependency of > rh-python36. So I then built the rh-python36 metapackage first, and I > had to install that as root. The first pass of python.spec then built > successfully. > > I then modified python-setuptools.spec to disable build_wheel, and > attempted to build. It failed because it requires rh-python36-devel. > So I attempt to install that package as root, and there are additional > dependency issues: > /opt/rh/rh-python36/root/usr/bin/python3.6m is needed by > rh-python36-python-devel-3.6.3-3.el7.centos.armv7hl > libpython3.6m.so.rh-python36-1.0 is needed by > rh-python36-python-devel-3.6.3-3.el7.centos.armv7hl > python(abi) = 3.6 is needed by > rh-python36-python-devel-3.6.3-3.el7.centos.armv7hl > rh-python36-python(armv7hnl-32) = 3.6.3-3.el7.centos is needed > by rh-python36-python-devel-3.6.3-3.el7.centos.armv7hl > rh-python36-python-libs(armv7hnl-32) = 3.6.3-3.el7.centos is > needed by rh-python36-python-devel-3.6.3-3.el7.centos.armv7hl > > I've attempted various combinations of force-installing the packages I > have, with various other issues. So what is the correct next step in > getting the setuptools package to build? > >
Without something which contains a dependency solver you will have to manually install the packages at your system. At this point it seems that you will have to install the python-devel, python and python-libs. You can check the dependencies of each rpm by invoking 'rpm -qp --requires <rpm>', or by examining the %package directives at the SPEC file of python. Although without doing it in some sort of build system (e.g. centos/fedora builds system), you will have to manually inspect what the dependencies are each time. Please let me know if that worked for you. > > > On Fri, Jun 8, 2018 at 12:10 PM, Charalampos Stratakis > <[email protected]> wrote: > > > > > > ----- Original Message ----- > >> From: "Joshua Kramer" <[email protected]> > >> To: "Neal Gompa" <[email protected]> > >> Cc: [email protected] > >> Sent: Thursday, June 7, 2018 2:22:56 PM > >> Subject: Re: [scl.org] rh-python36 SPEC file question (circular > >> dependency) > >> > >> Thanks, Neal! That got me a little farther. Per the comments at the > >> top of they python.spec file, I set with_rewheel to 0, then I built > >> the Python RPM. That seems to have worked. > >> > >> Now, when I attempt to build setuptools, using this command: > >> rpmbuild -ba ./python-setuptools.spec --define 'scl rh-python36' > > >> python-setuptools-build.log 2>&1 > >> > >> ...the build command fails with these errors: > >> error: Failed build dependencies: > >> rh-python36-python-devel is needed by > >> rh-python36-python-setuptools-36.5.0-1.el7.centos.noarch > >> rh-python36-python-pip is needed by > >> rh-python36-python-setuptools-36.5.0-1.el7.centos.noarch > >> rh-python36-python-wheel is needed by > >> rh-python36-python-setuptools-36.5.0-1.el7.centos.noarch > >> > >> Attempting to build the python-pip package results in similar errors. > >> > >> I have the following packages installed: > >> rh-python36-2.0-1.el7.src.rpm > >> rh-python36-python-3.6.3-3.el7.src.rpm > >> rh-python36-python-pip-9.0.1-2.el7.src.rpm > >> rh-python36-python-psycopg2-2.7.3-1.el7.src.rpm > >> rh-python36-python-setuptools-36.5.0-1.el7.src.rpm > >> rh-python36-python-virtualenv-15.1.0-2.el7.src.rpm > >> rh-python36-python-wheel-0.30.0a0-1.el7.src.rpm > >> rh-python36-scipy-0.19.1-2.el7.src.rpm > >> > >> What should I look for next? > >> > >> Thanks! > >> > > > > Hello. I am one of the maintainers for that collection so feel free to ping > > me > > directly, either on IRC or mail. > > > > Sorry for the complications you are facing, bootstrapping the interpreter > > to an rpm > > is indeed a quite complex procedure and it could be documented better. > > > > I will try to outline the steps with some explanations. > > > > Firstly, python bundles pip and setuptools, so ideally we'd like python to > > utilize the system > > installed packages instead of the bundled ones. What happens is that we > > first compile python > > including the bundled wheels (that's when we set the 'rewheel' macro to 0). > > > > Then we'd like to build pip and setuptools in the wheel [0] format so they > > can be utilized by python. > > However we still do not have the 'wheel' package built in order to do that, > > so we'll have to (byte)compile > > them the usual way, then compile wheel, and then build again python and > > setuptools as wheels. > > > > So you should set the build_wheel macro in python-pip's and > > python-setuptools' SPEC file to 0, build them and then > > build the python-wheel package. > > > > Then after you have built python-wheel, rebuild python-pip and > > python-setuptools with the build_wheel macro macro set to 1, > > as we can create the wheel format now since we have the wheel package on > > our system. > > > > Finally rebuild python with rewheel set to 1 in order for python to strip > > the bundled wheels and utilize the system installed > > ones (with a little bit of magic [1]. > > > > Long story short: > > 1. Build python with rehweel set to 0. > > 2. Build python-setuptools and python-pip with build_wheel set to 0. > > 3. Build python-wheel. > > 4. Build python-setuptools and python-pip with build_wheel set to 1. > > 5. Build python with rehweel set to 1. > > > > I hope that helps (and I hope I didn't forget any steps :) ). > > > > [0] https://pythonwheels.com/ > > [1] > > https://github.com/fedora-python/rewheel/blob/master/rewheel/__init__.py > > > >> On Mon, Jun 4, 2018 at 10:23 PM, Neal Gompa <[email protected]> wrote: > >> > On Mon, Jun 4, 2018 at 9:38 PM Joshua Kramer <[email protected]> > >> > wrote: > >> >> > >> >> Hello, > >> >> > >> >> I am trying to compile rh-python36 to use with CentOS on a Raspberry > >> >> Pi. > >> >> > >> >> On line 192 of the SPEC file are these lines: > >> >> %if 0%{?with_rewheel} > >> >> BuildRequires: %{?scl_prefix}python-setuptools > >> >> BuildRequires: %{?scl_prefix}python-pip > >> >> %endif > >> >> > >> >> What is this supposed to do? It prevents the package from building, > >> >> because there is a circular dependency- if I try to build python36, it > >> >> complains that python36-setuptools and python36-pip are not > >> >> installed... but I can't install those without having Python installed > >> >> first. If I comment those lines out I get no error and the build > >> >> almost completes. (It then fails the "multiprocessing" test, but > >> >> that's beside the point.) However, I don't want to break something by > >> >> commenting them out... so is there a better or "right" way to get rid > >> >> of the circular dependency? > >> >> > >> > > >> > Python is a two-cycle build. You build the first time with rewheel > >> > disabled (that removes those BRs), then after that's successfully > >> > built, you use those artifacts to build again with rewheel enabled. > >> > > >> > > >> > -- > >> > 真実はいつも一つ！/ Always, there's only one truth! > >> > >> _______________________________________________ > >> SCLorg mailing list > >> [email protected] > >> https://www.redhat.com/mailman/listinfo/sclorg > >> > > > > -- > > Regards, > > > > Charalampos Stratakis > > Software Engineer > > Python Maintenance Team, Red Hat > -- Regards, Charalampos Stratakis Software Engineer Python Maintenance Team, Red Hat _______________________________________________ SCLorg mailing list [email protected] https://www.redhat.com/mailman/listinfo/sclorg
