Nov
19
2009

Qt 4.6.0 rc1 – in portage – binary incompatibility warning!

So… qt-*-4.6.0_rc1 is now in the portage tree, masked (since its not a final release) and you can begin testing your shiny Qt applications with it.

But there’s a catch.

4.6.0_rc1 is not binary compatible with 4.6.0_beta1. [1]
This means that if you’re upgrading from 4.6.0_beta1 you have to rebuild every single app depending on qt-*, or they won’t start at all. This obviously includes all of KDE 4.

You can get portage to do that by using a command like this:
*update* it seems some shells didn’t like the old command, so I’ve updated it:

emerge -av1 $(for i in $(qlist -IC x11-libs/qt-); do equery -q d $i | grep -v 'x11-libs/qt-' | sed "s/^/=/"; done)

Note that this command assumes your system is up-to-date. If some installed packages don’t have ebuilds available for their version anymore, you’ll have to resolve that manually (probably by removing them and rerunning the command).

You’ll find equery in app-portage/gentoolkit and qlist in app-portage/portage-utils.

You don’t need to do this if you’re upgrading from Qt 4.5.3 (although you should). You’ll also be safe if you upgrade from 4.5.3 to 4.6.0 final when the time comes.

Portage will warn you about this when you upgrade qt-core to 4.6.0_rc1:

* Messages for package x11-libs/qt-core-4.6.0_rc1:

*
* Binary compatibility broke between 4.6.0_beta1 and 4.6.0_rc1.
* If you are upgrading from 4.6.0_beta1, you’ll have to
* re-emerge everything that depends on Qt.
* Use the following command:
*
* emerge -av1 $(for pkg in $(equery -q d \
* $(qlist -IC x11-libs/qt-) | grep -v “x11-libs/qt-” |
* sort -u); do echo “=$pkg”; done)
*
* YOU’VE BEEN WARNED
*

But users (my user side as well :p) tend to ignore ewarns from time to time ;)

Happy rebuilding!

[1] http://labs.trolltech.com/blogs/2009/11/12/bc-break-in-46-against-previous-46/

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posted in gentoo by Alex “wired” Alexander | 1 Comment

Nov
12
2009

how-to: keep your kde 3.5 after it’s removed from gentoo’s tree, using the kde-sunset overlay

As most of you know, KDE 3.5 is getting off the Gentoo train for various reasons mentioned elsewhere (in short: security, lack of upstream interest).

Some people are still using it though and they have been asking how they can keep it on their system, without emerge screaming each time they try to update world.

I’m writing this post to guide those people (you? :)) on how they can achieve that.

1. Adding the kde-sunset overlay
Perhaps the most important thing you need to remember is that the ebuilds will be completely removed from the tree, so you need to add an overlay called kde-sunset to portage which contains a copy of most of them.

To add the overlay you need to have layman with git USE flag enabled:

USE="git" emerge -av layman

make sure you add the git USE flag in your package.use or make.conf :)

you can then use layman to install the overlay:

layman -f
layman -a kde-sunset

if this is your first time using layman, you’ll have to add the following line @ the end of your make.conf:

source /usr/local/portage/layman/make.conf

you can keep the overlay updated by running:

layman -s kde-sunset

2. KDE 3.5 is masked (this is necessary only while KDE 3.5 is still in tree)
Now we have the overlay, but until KDE 3.5 is completely wiped off the tree, there’s a mask to warn users about it.
Portage will scream about this mask each time you try to emerge so you need to unmask KDE 3.5 manually.

There are two (and a half) ways to do this:
a1) if your package.unmask is a folder, symlink the unmask file from kde-sunset to /etc/portage/package.unmask/

ln -s /usr/local/portage/layman/kde-sunset/Documentation/package.unmask/kde-3.5 /etc/portage/package.unmask/kde-3.5

a2) if your package.unmask is not a folder you can append the file (but you’ll have to update it manually)

cat /usr/local/portage/layman/kde-sunset/Documentation/package.unmask/kde-3.5 >> /etc/portage/package.unmask

b) if you don’t like all that, you can emerge autounmask

emerge -av autounmask

and ask it to unmask stuff for you – note that autounmask doesn’t like :slot and will only work with -version

autounmask kde-meta-3.5

3. I don’t want KDE 4 (yet)
So all is great now but portage wants to install KDE 4 when you emerge world.
This is happening because KDE 4 went stable recently and portage thinks you want to upgrade (you should btw ;)).
To fix this one we need to tell portage that we actually want the 3.5 version of KDE and we don’t care about 4.

we need to edit /var/lib/portage/world and add a version (or a slot) to every kde 3.5 app we have in there.

* be careful with this file *

for example, lets say that you installed kde 3.5 using the kde-meta ebuild.
if you open /var/lib/portage/world you’ll find a line saying

kde-base/kde-meta

you need to add :3.5 which is the 3.5 slot, or -3.5.10 which is the version (or both, version first) at the end. if you add the version, you’ll have to prepend a “=” as well.

the line should now read:

kde-base/kde-meta:3.5

do this for each KDE 3.5 app you have in the world file. If you’re unsure of the slot/version, use eix packagename to find it out.

4. All systems go

emerge -avDuN world

^^ this should now be clean of any KDE 4 traces and mask warnings :)

If you have any issues or are interested in maintaining kde-sunset, you may visit us over @ #gentoo-kde in freenode’s IRC network or drop us an email at kde _at_ gentoo _dot_ org. We’ll do our best to help you :)

Maybe after reading this post your KDE 3 installation will last a bit longer ;)

Enjoy and see you w/ KDE 4 soon :P

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posted in gentoo by Alex “wired” Alexander | 20 Comments

Nov
10
2009

gentoo-user-el mailing-list – for all the greeks out there :)

Starting today, Greek Gentoo users have their own mailing list to discuss stuff and ask questions: gentoo-user-el.

For more info on how to subscribe, please visit http://www.gentoo.org/main/en/lists.xml

The list is not mentioned there yet, but you can use it normally.

[the rest of this message is in greek]

Οι έλληνες χρήστες του Gentoo έχουν πλέον την δική τους mailing list όπου μπορούν να συζητούν για το Gentoo: gentoo-user-el.

Βοηθήστε ο ένας τον άλλο ή ζητήστε βοήθεια από τους έλληνες Gentoo Developers!

Για να γραφτείτε, στείλτε ένα άδειο μήνυμα στην διεύθυνση gentoo-user-el+subscribe _at_ lists.gentoo.org,

Για περισσότερες πληροφορίες σχετικά με τις mailing λίστες του Gentoo πηγαίνετε εδώ: http://www.gentoo.org/main/en/lists.xml

Για να διαβάσετε παλαιότερες συζητήσεις της λίστας, πηγαίνετε εδώ: http://archives.gentoo.org/gentoo-user-el/

Το πρώτο μας μήνυμα: http://archives.gentoo.org/gentoo-user-el/msg_4eb9364bded3280c9685356b9e0445d0.xml

Εαν προτιμάτε πιο άμεση επικοινωνία, μπορείτε να μας βρείτε στο freenode irc network: http://java.freenode.net/index.php?channel=gentoo-el

:)

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posted in gentoo by Alex “wired” Alexander | 3 Comments

Nov
05
2009

KDE in Gentoo, an update

KDE 4.3.3 was released on Tuesday, with ebuilds instantly available to users in the main tree.

We also have KDE 4.3.1 in stable \o/

KDE 3.5 is on its way out of portage, with kde-sunset being the overlay that will (hopefully) be maintained by users still interested in it.

Finally, KDE 4.4 Beta 1 is due December 1st and you’ll find it in the kde-testing overlay as usual :)

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posted in gentoo by Alex “wired” Alexander | 18 Comments

Oct
15
2009

google wave, the future of flame wars has arrived :D

I got my Google Wave account invitation yesterday. After a few hours I actually found some people to talk to (this preview is still in its baby stages).

I have to say, I was impressed. You chat (and it updates) in real time. You can embed stuff like Google maps, Google searches and Youtube videos (and the list will surely improve since it seems to support Google gadgets). It really feels like next-gen email combined with a messenger :)

It is called a preview for a reason though. Sometimes you need to refresh the browser and at other times your waves go crazy and you can’t use them for a while. It also tends to eat up lots of CPU if you have a lot of participants and media content. But its Google, so we know its all going to be fixed really soon :)

Embedded Wave

Below you’ll find an embedded wave I’ve added using the Wavr WordPress Plugin (you need to have a Wave Account).

Continue Reading »

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posted in general by Alex “wired” Alexander | 4 Comments

Sep
08
2009

Qt 4.6, git branches and gentoo’s qting-edge overlay

Nokia switched their Qt git master to version 4.7 recently, creating a new branch for 4.6.

They also created two new branches, master-stable and 4.6-stable. Commits pushed to those branches are tested in Nokia’s testing farms, ensuring that they’ll always build.

The Gentoo Qt team provides various live Qt ebuilds in our official overlay, qting-edge [1]. These ebuilds now include x11-libs/qt-*-4.6.9999, building code from the 4.6 Qt branch, as well as a new USE flag called stable-branch, available (and enabled by default) in 4.6.9999 and 4.9999. This USE flag enables/disables the use of the stable branches, allowing you to choose between last-minute code VS tested, known to compile code.

Either way, its bleeding edge!

If you need help, leave a comment or visit us @ Freenode IRC, #gentoo-kde

[1] to install qting-edge, make sure you have layman installed and configured, then run layman -a qting-edge.

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posted in gentoo by Alex “wired” Alexander | 1 Comment

Sep
02
2009

kde 4.3.1 released, in gentoo

UPDATE: 4.3.1 is now unmasked for amd64/x86 and the masking issue has been fixed by jmbsvicetto, so we won’t have this issue again in the future! The post below is updated to reflect on it.

The first bugfix release for KDE 4.3, 4.3.1, is now available.

You can read about the improvements it brings here.

Ebuilds for KDE 4.3.1 are already available in gentoo for architectures amd64 and x86.

To upgrade from 4.3.0 you simply need to

emerge --sync
emerge -avDuN world

This should be a straightforward update for most people.

If you’re upgrading from an older KDE 4 version (or clean-installing KDE 4 on a stable system) you should keyword-unmask KDE 4.3 by following this post’s instructions. You’ll also find some troubleshooting hints there.

The ebuilds are hard.masked for all other architectures due to bug 280312.

As usual, if you have any issues, feel free to leave a comment or visit us @ IRC: freenode/#gentoo-kde :)

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posted in gentoo by Alex “wired” Alexander | 4 Comments

Aug
05
2009

kde 4.3 is here :) quick gentoo (upgrade) guide

KDE 4.3 has arrived :D

Lots of behind-the-scenes fixes, a new pretty (debatable) default plasma theme and various new stuff across the board make kde 4.3 an exciting release!

Gentoo ebuilds were available the moment tarballs were released, thanks to the hard work of our Gentoo KDE team ;)

However, since 4.3 brings some new packages (and dependencies), we’ve hard masked the ebuilds until everything gets the proper keywords.
You can follow the keywording progress in bug 280312.

Instructions on how to unmask kde 4.3 after the screenshot

kde 4.3

unmasking & installing kde 4.3
kde 4.3 might be masked but it works fine on x86 and amd64 (for other archs check the bug above).
to install it, you can easily unmask it using the unmask file provided in the kde-testing overlay, [kde-testing]/Documentation/package.unmask/kde-4.3

if you don’t have / don’t want the overlay, you can grab the file here.

you can also use a command similar to

# unmasking kde 4.3
wget -O /etc/portage/package.unmask/kde-4.3 'http://git.overlays.gentoo.org/gitweb/?p=proj/kde.git;a=blob_plain;f=Documentation/package.unmask/kde-4.3'

to automatically save the unmask file to your unmask folder (if you use folders) :)

for those using stable gentoo, there’s a similar keywords file

# adding kde 4.3 in package.keywords/
wget -O /etc/portage/package.keywords/kde-4.3 'http://git.overlays.gentoo.org/gitweb/?p=proj/kde.git;a=blob_plain;f=Documentation/package.keywords/kde-4.3.keywords'

troubleshooting
if you’re trying to upgrade from kde 4.2, but portage gives you nice little blocks, there are a few things you can check:

  • make sure you’ve synced the tree and kde-testing overlay (if using it) :p
  • make sure the unmask/keyword files are correct and up-to-date
  • check that you don’t have any 4.2 versioned kde-base/* items in /var/lib/portage/world
  • check that you don’t have any 4.2 versioned sets in /var/lib/portage/world_sets
  • emerge -avDuN world — you’ll probably get some messy output but all blocks should be automatically resolved

if you hit any issues feel free to leave a comment, check the gentoo kde 4 guide (should be up-to-date soon) or visit us @ #gentoo-kde (freenode).

enjoy your shiny new kde!

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posted in gentoo by Alex “wired” Alexander | 13 Comments

Jul
17
2009

gentoo/developer/wired

Yes, I finally became a Gentoo Developer :)

posted in gentoo by Alex “wired” Alexander | 6 Comments

Jul
15
2009

gentoo ~testing, clean install, qt, kde 4, blocks, HELP! [fixed]

UPDATE: All <qt-*-4.5.3:4 ebuilds were removed on Nov 11th, 2009, so this problem is now fixed ;)

So…… you’re trying to emerge kde 4 on your fresh ~ gentoo installation but strange blocks show up… stuff like

[blocks B ] >x11-libs/qt-opengl-4.5.1-r9999 (">x11-libs/qt-opengl-4.5.1-r9999" is blocking x11-libs/qt-gui-4.5.1-r2, x11-libs/qt-dbus-4.5.1)
[blocks B ] >x11-libs/qt-webkit-4.5.1-r9999 (">x11-libs/qt-webkit-4.5.1-r9999" is blocking x11-libs/qt-gui-4.5.1-r2, x11-libs/qt-dbus-4.5.1)
[blocks B ] >x11-libs/qt-svg-4.5.1-r9999 (">x11-libs/qt-svg-4.5.1-r9999" is blocking x11-libs/qt-gui-4.5.1-r2, x11-libs/qt-dbus-4.5.1)
[blocks B ] >x11-libs/qt-core-4.5.1-r9999 (">x11-libs/qt-core-4.5.1-r9999" is blocking x11-libs/qt-gui-4.5.1-r2, x11-libs/qt-dbus-4.5.1)
[blocks B ] >x11-libs/qt-qt3support-4.5.1-r9999 (">x11-libs/qt-qt3support-4.5.1-r9999" is blocking x11-libs/qt-gui-4.5.1-r2, x11-libs/qt-dbus-4.5.1)
[blocks B ]
[blocks B ] x11-libs/qt-sql-4.5.1-r9999 (">x11-libs/qt-sql-4.5.1-r9999" is blocking x11-libs/qt-gui-4.5.1-r2, x11-libs/qt-dbus-4.5.1)
[blocks B ] >x11-libs/qt-script-4.5.1-r9999 (">x11-libs/qt-script-4.5.1-r9999" is blocking x11-libs/qt-gui-4.5.1-r2, x11-libs/qt-dbus-4.5.1)
[blocks B ] >x11-libs/qt-test-4.5.1-r9999 (">x11-libs/qt-test-4.5.1-r9999" is blocking x11-libs/qt-gui-4.5.1-r2, x11-libs/qt-dbus-4.5.1)

All this is happening because of recent changes to gentoo’s Qt ebuilds. In Qt Team’s last meeting it was decided to make most USE flags disabled by default, to allow the user to choose which ones he wants to enable, rather than disable.

However, in portage’s current state, the stable Qt packages (4.5.1 version) use the old USE flags with lots of them enabled by default.

Now comes the tricky part. KDE depends on qt-gui with dbus USE flag enabled. Normally, when portage sees that dependency, it checks your USE flags. If dbus is enabled, all is good. If not, it breaks with an error telling you to enable it.

In reality this never happens. Portage first checks qt-gui-4.5.2, which doesn’t have dbus enabled by default. No go. But wait, qt-gui-4.5.1 has it enabled and portage falls back to it. So now portage tries to mix all the other qt-*-4.5.2 packages with qt-gui-4.5.1 (and its 4.5.1 dependencies) and as I’ve mentioned before, this is not allowed.

Boom, blockers.

SOLUTION

Ok maybe you didn’t feel like reading all of the above, so I’ve titled this so you can find it easily :D

The solution to this problem is suprizingly easy.

Add “dbus” and “qt3support” to your make.conf USE (dbus can also go in package.keywords for qt-gui).

OR

Switch to the Desktop Profile.

Its that easy (thankfully) :)

WHY DID IT HAVE TO BREAK?

Thats a good question. The real reason this broke is because the stable version has +dbus (which we can’t change now cause its stable – too much hassle) and the testing version has -dbus (which is better since the idea is you get a package and “add” to it with USE flags). Since the Qt Team decided to go through with this change and Portage falls back to the older version without a warning, there’s nothing we can do about this, at least until a new Qt version goes stable with -dbus or portage’s behavior changes.

Thats all folks =] Questions welcome in the comment system below :)

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posted in gentoo by Alex “wired” Alexander | 24 Comments

 
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