Does libyang really need debhelper 11 and Swig 3.0.12?

opensourcerouting / libyang-debian

libyang Debian packaging

BSD 3-Clause "New" or "Revised" License

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Does libyang really need debhelper 11 and Swig 3.0.12? #2

Closed njh closed 5 years ago

njh commented 5 years ago

Hi,

I am trying to build a libyang Debian package for use on VyOS. The current version of VyOS uses Debian jessie as a base, which comes with debhelper 9 and Swig 2.0.12.

Is there a reason why libyang depends on newer versions of debhelper and swig, or did you just set it to what comes with more recent versions of Debian?

Thanks,

nick.

eqvinox commented 5 years ago

Swig 3.0.12: yes, it's needed. The only "workaround" would be to disable the C++ and Python bindings.
debhelper 11: the current packaging relies on it, so just editing it out won't work. The major difference is library installation paths (/usr/lib/<multiarch> on dh11), you'd need to change that for dh9.

However, the solution for your problem is far easier than this: build the packages on Debian buster and use them on jessie and stretch. I have tested and verified this works and will check into keeping it this way. This applies for the following binary packages:

libyang0.16
libyang-cpp0.16
libyang-dev
libyang-cpp-dev
yang-tools

The Python packages will not work on jessie/stretch, i.e.:

python3-yang
python3-yang-dbg

njh commented 5 years ago

Thank you very much, that is really helpful.

I will have a go at building it on buster

njh commented 5 years ago

I have successfully built libyang on Buster Virtual Machine using dpkg-buildpackage -uc -us -tc -b, which created the following packages:

libyang-cpp-dev_0.16.105-1_i386.deb
libyang-cpp0.16-dbgsym_0.16.105-1_i386.deb
libyang-cpp0.16_0.16.105-1_i386.deb
libyang-dev_0.16.105-1_i386.deb
libyang0.16-dbgsym_0.16.105-1_i386.deb
libyang0.16_0.16.105-1_i386.deb
python3-yang-dbg_0.16.105-1_i386.deb
python3-yang_0.16.105-1_i386.deb
yang-tools-dbgsym_0.16.105-1_i386.deb
yang-tools_0.16.105-1_i386.deb

I also successfully dpkg -i installed libyang0.16 and yang-tools on a Jeesie virtual machines.

However when trying to run the lb / live-build command to build the ISO, I get a weird error:

E: Sub-process false received signal 2.
E: Errors apply to file './libyang0.16_0.16.105-1_i386.deb'

I am getting the same problem with version 0.16.52. It isn't a very helpful error message, so I have no idea if there is a problem with libyang or if something else is going on...

eqvinox commented 5 years ago

Hm, I've never worked on building debian live ISOs, so I know exactly nothing about the process for that and can't really help you :frowning_face: ... there's got to be some way to get more verbose output though?

eqvinox commented 5 years ago

Wait - did you sign the resulting .deb? I think dpkg -i will accept unsigned .debs, but live-build maybe doesn't?

njh commented 5 years ago

Good thought but I am installing other unsigned .deb packages, so I suspect that isn't the problem. I don't have any experience with building live ISOs either.

I have tried running with --debug and --verbose but that doesn't seem to give anything more helpful.

I suspect that false is referring to /bin/false but I am not sure what is trigging that to be run.

I will close this issue my original issue is answered.