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How to test/try out Qt 4 Preview 2

StringCheesian

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Friday, September 24th 2004, 5:00pm

How to test/try out Qt 4 Preview 2

I'm using an ~x86 install of Gentoo Linux.

1. Is Qt 4 Preview 2 backwards compatible with Qt 3.x stuff, like KDE 3.3.0?
2. What versions of gcc is it known to compile with? (I'm using 3.4.1, but I'll revert to 3.3.4 if I have to)

wysota

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Friday, September 24th 2004, 5:20pm

RE: How to test/try out Qt 4 Preview 2

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Originally posted by StringCheesian
I'm using an ~x86 install of Gentoo Linux.

1. Is Qt 4 Preview 2 backwards compatible with Qt 3.x stuff, like KDE 3.3.0?
2. What versions of gcc is it known to compile with? (I'm using 3.4.1, but I'll revert to 3.3.4 if I have to)


1. No
2. 2.95

Generally, see the anouncements.
Live and let live - use the search engine.
"Use the docs Luke, use the docs!"

StringCheesian

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Friday, September 24th 2004, 5:30pm

Woah, there are people who still use 2.95?!?! Isn't that version ancient/obsolete?

wysota

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Friday, September 24th 2004, 5:44pm

It's the most stable version of gcc and it's recommended for (for example) Linux kernel compilation. It's far from being obsolete :)
Live and let live - use the search engine.
"Use the docs Luke, use the docs!"

StringCheesian

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Friday, September 24th 2004, 5:54pm

My entire Gentoo Linux system, including my 2.6.8.1 kernel, qt 3.3.3, KDE 3.3.0, and everything else was all compiled using gcc 3.4.1. A current standard "stable" install of Gentoo would compile everything with gcc 3.3.4. Is that a bad thing?

This post has been edited 1 times, last edit by "StringCheesian" (Sep 24th 2004, 5:58pm)

djanubis

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Friday, September 24th 2004, 6:03pm

RE: How to test/try out Qt 4 Preview 2

Quoted

1. Is Qt 4 Preview 2 backwards compatible with Qt 3.x stuff, like KDE 3.3.0?

No, at least for the moment, and even at term, it should not be binary compatible, as most base Qt class have changed in radical way.

Quoted

2. What versions of gcc is it known to compile with? (I'm using 3.4.1, but I'll revert to 3.3.4 if I have to)

It compiles with 3.4.1, without a problem.
You should use something like /opt/qt4 prefix if you don't want to mess all your stable installs.

Being a preview, not all classes are implemented, specially the compat group (source compatibility with Qt-3), some of the newer are far from being optimized. But it has a great advantage: letting us study and comment (via the list) new technologies bundled in next version.
Never patch not working code. Rewrite it !
Never patch badly designed classes. Recreate them cleanly.
(Excerpts from Computing Bible)

Home of the Lab project

wysota

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Friday, September 24th 2004, 6:03pm

The thing is that Trolltech want to have as stable environment as they can for the preview, so they use 2.95 for testing. I have a kernel compiled with gcc 3.3 myself and a whole LFS distribution as well :)
Live and let live - use the search engine.
"Use the docs Luke, use the docs!"