Comments on: an absolute failure – unable to build qt5 on a raspberry pi 4/2019/09/02/an-absolute-failure-unable-to-build-qt5-on-a-raspberry-pi-4/various and sundry notionsWed, 04 Sep 2019 20:34:15 +0000hourly1http://wordpress.com/By: discovering kivy on raspbian buster and the rpi4B – Arcane Science Lab/2019/09/02/an-absolute-failure-unable-to-build-qt5-on-a-raspberry-pi-4/comment-page-1/#comment-1352Wed, 04 Sep 2019 20:34:15 +0000/?p=4216#comment-1352[…] change comment on an earlier post (an absolute failure – unable to build qt5 on a raspberry pi 4, /2019/09/02/an-absolute-failure-unable-to-build-qt5-on-a-raspb…) by developer outsourcedguru (https://outsourcedguru.wordpress.com/) I have “fallen” […]

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By: whbeebe/2019/09/02/an-absolute-failure-unable-to-build-qt5-on-a-raspberry-pi-4/comment-page-1/#comment-1351Wed, 04 Sep 2019 02:07:51 +0000/?p=4216#comment-1351In reply to outsourcedguru.

As noted in a later post Dorian’s rain bands are finally moving over central Florida and Orlando.In another 24 hours hopefully everything will move out. The biggest question for me at least is how we’ll help those in Grand Bahama and Abaco.

I was surprised when the Pi4 was released as early as it was. I can work with what it has so far and around the problems I’ve discovered until such time (probably next year as originally intended). In the mean time I’ve fallen back on the old stalwarts, as it were, such as emacs. Coming back to emacs is like coming home for me personally. The newer tools, languages like Rust and Go, seem to be working well in this environment as well. It isn’t perfect, but it all suits me fine in spite of everything.

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By: outsourcedguru/2019/09/02/an-absolute-failure-unable-to-build-qt5-on-a-raspberry-pi-4/comment-page-1/#comment-1350Wed, 04 Sep 2019 00:21:33 +0000/?p=4216#comment-1350Condolences on the hurricane. Here on the other coast this barely makes our radar except for the posts on here.

The Pi4Bs were coming out to users before Buster was even carved in stone. We now have end-users clamoring for Pi4 support all over the place and no real answer to give anyone. (They thought it would come out in 2020, that’s what everyone was told earlier.)

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By: whbeebe/2019/09/02/an-absolute-failure-unable-to-build-qt5-on-a-raspberry-pi-4/comment-page-1/#comment-1348Mon, 02 Sep 2019 17:55:26 +0000/?p=4216#comment-1348In reply to outsourcedguru.

You would think that success building what already comes pre-built in the repos would be a foregone conclusion, but not here it would seem. If I can’t reproduce what’s in the repos, then what am I missing? Don’t get me wrong, I like the RPi 4. But this was rushed to market, from the use of step ‘B’ release silicon (overheating) to rough release drivers (USB overheating) to wiring mistakes on the boards themselves (I’m looking at you, USB C power connector). I can work around a lot of that with mechanical fixes (such as a Flirc box to hold the RPi4B and pull away most heat). As for everything else, I can wait and just use what’s already in the repos. Right now I’ve got Python 3.8 beta running and the latest GCC, 9.1, compiling away. I’ve got hardware hanging off the GPIO and I2C, so there’s that for me to experiment with.

In the meantime I’ve got a hurricane to worry about. I just got a Tropical Storm Warning text from Orange County. Expect lots of wind and rain. Especially rain.

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By: outsourcedguru/2019/09/02/an-absolute-failure-unable-to-build-qt5-on-a-raspberry-pi-4/comment-page-1/#comment-1347Mon, 02 Sep 2019 17:14:40 +0000/?p=4216#comment-1347Welcome to my world. But instead of QT I’m using Kivy and bleeding-edge enthusiasts other than myself are also suffering. And yet, perhaps 50% of the people attempting to get full-screen Window support on their Raspi4B are having problems.

To me, it feels like some of the drivers just aren’t there yet. The Pi4 appears to support OpenGL ES 3.0 believe it or not, at least that’s what it’s showing up as. The problem is that many of these support layers and libraries are either compiled with 1.0 or 2.0 versions of same. I’m not convinced that there even are C headers for GLES3.0 yet. Many of us are patiently waiting for this to fix itself in some update. The fix might ultimately be to 1) wait, 2) do `sudo apt-get update && sudo apt-get upgrade` in the future, 3) rebuild.

That said, I was able to get a simple Hello World app to create a window in Raspbian Buster Desktop with Kivy 1.11.1 and Python 3 by only launching the app within a Terminal from the local Pi itself.

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