[sane-devel] Getting Alpine Linux sane-backends builds compiler warning free

Valery Kartel valery.kartel at gmail.com
Tue Jul 25 09:24:52 UTC 2017

Hi, Olaf

I pushed a PR for libieee1284, so waiting for accept it.

And now I playing with sane-backends building with libpng, libieee1284 and
linux-headers as you mentioned.

There are some new backends enabled now:

> I also see that you list the license as GPL in the APKBUILD file.
Yes I set GPL as a license for this package and all its subpackages. But I
saw its not so simple with some backends licensing.

Can you provide me some idea or some list how to describe licensing right
way for not-only-gpl parts?

Thanks for advise


2017-07-22 15:52 GMT+03:00 Olaf Meeuwissen <paddy-hack at member.fsf.org>:

> Hi Valery,
> I'm one of the SANE developers and am trying to get rid of all compiler
> warnings on a select subset of build environments.  Alpine Linux is one
> of them and its parallel port IO support is giving me a bit of trouble.
> Hope you can help me out a bit.
> I don't see any libieee1284 packages for 3.6.  Is there any activity to
> add libieee1284?  It would enable support for a few more backends.
> A few backends also provide parallel port IO support if certain Linux
> kernel headers are present.  Looking at the `makedepends` list in the
> sane package's APKBUILD file, I don't see kernel-headers listed.  Can
> I assume that the Alpine package build environment makes sure that is
> present?  If not, you may want to add it.  It would make at least the
> umax_pp backend do something more useful.  Without that package, it
> compiles but essentially just no-ops just about all the I/O after
> spitting out a warning, IIUC.
> My builds have so far not included the kernel-headers package in the
> list of packages to be installed but I'm leaning towards adding it.  It
> would solve a major compiler warning headache for me ;-)
> If Alpine Linux' default build environment always includes it, I feel
> more justified to "take the easy way out".
> You can find my build environment setup[1] as well as build logs[2] (the
> middle stage, first on the drop-down list) over at GitLab.com.
>  [1]: https://gitlab.com/sane-project/ci-envs/blob/master/
> alpine-3.6-musl.df
>  [2]: https://gitlab.com/sane-project/backends/pipelines
> Somewhat off-topic, but ...
> I also see that you list the license as GPL in the APKBUILD file.  Is
> that for that file only or does that apply to the binary packages?
> If the latter, it's not correct and really should be fixed.
> BTW, love the fact that you provide a package per backend!  Wishing
> other distributions would do the same.
> Thanks for any feedback in advance,
> --
> Olaf Meeuwissen, LPIC-2            FSF Associate Member since 2004-01-27
>  GnuPG key: F84A2DD9/B3C0 2F47 EA19 64F4 9F13  F43E B8A4 A88A F84A 2DD9
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