From: James Le Cuirot <chewi@gentoo.org>
To: gentoo-dev@lists.gentoo.org
Subject: Re: [gentoo-dev] crossdev: installing _host_ build dependencies not automatic?
Date: Wed, 3 May 2017 22:47:18 +0100 [thread overview]
Message-ID: <20170503224718.4fb7f666@symphony.aura-online.co.uk> (raw)
In-Reply-To: <20170503175643.316ff1aa@gentoo.org>
[-- Attachment #1: Type: text/plain, Size: 2947 bytes --]
On Wed, 3 May 2017 17:56:43 +0200
Alexis Ballier <aballier@gentoo.org> wrote:
> On Wed, 3 May 2017 12:05:48 +0200
> "Paweł Hajdan, Jr." <phajdan.jr@gentoo.org> wrote:
>
> > I encountered <https://bugs.gentoo.org/show_bug.cgi?id=617276> while
> > working on some cross-compiling project.
> >
> > Admittedly, it may not be that easy to handle host package
> > dependencies fully automatically.
> >
> > I'm wondering - is it documented what portage guarantees, and what I'm
> > expected to just manually handle to provide host build dependencies?
> >
> > Any other advice about properly using crossdev would also be
> > appreciated. I'd be happy to test and help improve things.
>
>
> From man emerge:
>
>
> --root-deps[=rdeps]
> If no argument is given then build-time dependencies of
> packages for ROOT are installed to ROOT instead of /. If the
> rdeps argument is given then discard all build-time dependencies
> of packages for ROOT. This option is only meaningful when used
> together with ROOT and it should not be enabled under normal
> circumstances!
>
> Does not affect EAPIs that support HDEPEND. Experimental
> EAPI 5-hdepend provides HDEPEND as a new means to adjust
> installation into "/" and ROOT. If ebuilds using EAPIs
> which do not support HDEPEND are built in the same
> emerge run as those using EAPIs which do support HDEPEND,
> this option affects only the former.
>
>
> crossdev wrappers set --root-deps=rdeps (read cross-emerge, this can be
> overriden), but be careful: If you only care about getting all the deps
> and maybe more then removing --root-deps might help you. However, when
> cross compiling you will likely run into broken deps since / and ROOT
> will not use the same keyword visibility.
I was going to point to crossdev's use of --root-deps=rdeps too. I did
wonder why on earth this was even added. I overrode it for quite a
while and didn't have any issue. History showed that it was added by
solar without much of an explanation. He's no longer around to ask. It
wasn't until I tried to build a brand new ppc64le system recently that
I finally found a reason for it, though I'm not sure it was the
original reason. The multilib ABI USE flags start conflicting horribly
in cross situations and this option seems to be the only way around it
at present.
I doubt keyword visibility is an issue. Portage uses a different
configuration between / and ROOT when cross-compiling. I don't think it
tries to force the same package versions beyond what is specified in
the ebuild. For pure build-time dependencies, the package will only be
installed to / anyway (i.e. you don't need cmake in ROOT) so there is
nothing to enforce here.
--
James Le Cuirot (chewi)
Gentoo Linux Developer
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 981 bytes --]
next prev parent reply other threads:[~2017-05-03 21:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-03 10:05 [gentoo-dev] crossdev: installing _host_ build dependencies not automatic? Paweł Hajdan, Jr.
2017-05-03 15:56 ` Alexis Ballier
2017-05-03 21:47 ` James Le Cuirot [this message]
2017-05-04 8:21 ` Alexis Ballier
2017-05-13 19:41 ` Paweł Hajdan, Jr.
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170503224718.4fb7f666@symphony.aura-online.co.uk \
--to=chewi@gentoo.org \
--cc=gentoo-dev@lists.gentoo.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox