I was trying to get Qupzilla installed yesterday and I noticed that it depends on qt5, as does qmplay2. I started compiling qt5 yesterday and I aborted compiling after an hour because I needed to sleep and didn't really want to leave the netbook charging overnight.

Now reading around it seems that qt5 can take an age to compile, I've read some people say it took 19+ hours. On this machine, a 1.6Ghz Atom with 2GB RAM, could it take that long or longer? If it would take as long I may have to try to circumvent qt5 apps [I hope it's not the same with LibreOffice taking as long].

it DOES take some time to finish. Even on fast machine, it could take several hours to complete.
AlienBOB has generously provided Qt5 binary packages for 14.2 in his repository.

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Why not get it from AlienBob's slackbuilds repository? http://www.slackware.com/~alien/slackbuilds/qt5/
http://www.slackware.com/~alien/

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Ah, he pre-compiles. I see the relevant packages for i486 here:

http://www.slackware.com/~alien/slac.../qt5/pkg/14.2/

Here also

https://slackware.pkgs.org/14.2/alie...alien.txz.html

Could someone point me in the direction of how to get these working?

@Lysander666

1) one way is to
a) download package by hands say to /tmp
b) run as root
installpkg /tmp/qt5-5.7.0-i486-3alien.txz
or
upgradepkg --install-new /tmp/qt5-5.7.0-i486-3alien.txz
c) if and when package will be upgraded on server, repeat (a) and
upgradepkg /tmp/qt5-new.version.of.package.txz

2) another way is to
a) download and install slackpkg+ plugin
b) uncomment alien mirror in /etc/slackpkg/slackpkgplus.conf and run once to update repo keys
slackpkg update gpg
c) run to update info about packages
slackpkg update
d) run to install qt5 or any package from repo
slackpkg install qt5
e) run periodically to receive upgrades for installed packages
slackpkg update
slackpkg upgrade-all

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Great reply, thanks. 1 sounds the simplest to me.

So out of the packages here, qt5-5.7.0-i486-3alien.txz is the only one required to install? If so, that's very good of AB.

You download the qt5-5.7.0-i486-3alien.txz. You su to root. Then you installpkg qt5-5.7.0-i486-3alien.txz. I guess this doesn't conflict with qt4?

The qt5-5.7.0-i486-3alien.dep says it needs libxkbcommon and libinput:
http://www.slackware.com/~alien/slac.../libxkbcommon/
http://www.slackware.com/~alien/slackbuilds/libinput/

You might have those installed already.

Then in /etc/slackpkg/mirror you add so it doesn't get removed when updating with slackpkg.

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@Lysander666
Slackware packages use one of .txz, .tgz, .tbz, .tlz suffixes (corresponding to used compressor xz, gzip, bzip2 or lzma).
Other files are:
*.dep -- list of additionaly needed packages
*.lst -- list of files in package (used to build MANIFEST.bz2)
*.meta -- package info and description (used to build PACKAGES.TXT)
*.txt -- package description only
*.asc -- signature
*.md5 -- MD5 hash (used to build CHECKSUMS.md5)

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RadicalDreamer - very straightforward instructions, thank you. Yes, I already have libxkbcommon and libinput. I have read that the build doesn't conflict with qt4. I'll try tonight and report back.

Very nicely laid out and explained. Thank you very much. I'm impressed with the community response in this thread and my last.

I know you already downloaded Alien Bob's qt5, but just to solidify how that was the best option... I tried compiling qt5 several times on my htpc, which runs a lowly AMD Athlon 5350. I never could get it to compile since it kept erroring out, but it was taking several days before it would run into whatever error was halting compilation. I don't even know how close it was to completing it. For all I know, it could've taken a week to compile on it.

I'm not sure how the Atom compares to my 5350, but I wouldn't be surprised if it is similar.

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The AMD 5350 is a 2Ghz quad core - whereas my Atom N270 is a 1.6Ghz single core. I dread to think whether the Atom would have been able to complete the process at all after several days. Even in the one hour I attempted last night I noticed a couple of fatal errors.

I'm glad you told me about your quad core though. My main [Debian] box runs a 2.6Ghz quad core Q8400. Interesting to know that that also could have struggled with a qt5 compile if it were running Slack.

Just for info the latest qupzilla version need qt5-5.8 AND maybe qt5-5.9

If you want yet another comparison, I compile qt5 on a i3-2130 2-core w/hyper-threading @3.4GHz and 8GB 1066MHz RAM. Therefore I technically have 4 useable threads, so when I compile I use -j8. It takes me a couple minutes over 4 hours.

I would guess that on your Q8400 with -j8 it would take from 5 to 6 hours.

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Skaendo - thanks for that, really glad that I didn't try on the Atom. I didn't realise things could take that long to compile, I've got quite a bit to learn.

I've used Alien BOB's excellent binaries and they worked without a hitch. I now have QT, Qupzilla and LibreOffice running with no issues [I need to get MS fonts for LO though].

I think on this machine that sources which are more than a few hundred kilobytes are going to take a while to compile. I've used a lot of pre-build binaries.

I also got hold of ponce's excellent LXDE DE which works perfectly too.