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lars_the_bear
Guru
Joined: 05 Jun 2024
Posts: 522
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 Posted: Thu Jun 27, 2024 12:58 pm Post subject: [Solved] Can't install KiCAD because of some Python problem |
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Hi folks
I'm trying to set up KiCAD on a Gentoo system I just installed. By `emerge sci-electronics/kicad` fails with an error message:
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The following REQUIRED_USE flag constraints are unsatisfied: exactly-on-of ( python_single_target_python3_10 python_single_target_python3_10 )
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There's some discussion of similar topics elsewhere on this forum, but I didn't understand it. FWIW `emerge --info` shows
PYTHON_SINGLE_TARGET="python3_12" and PYTHON_TARGETS="python3_12"
I'm afraid I don't know what any of this means. Can anybody tell me what I need to do to proceed?
BR, Lars.
Last edited by lars_the_bear on Fri Jun 28, 2024 5:36 pm; edited 1 time in total |
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grknight
Retired Dev
Joined: 20 Feb 2015
Posts: 1921
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| Posted: Thu Jun 27, 2024 1:08 pm Post subject: |
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I would suggest to allow the testing ebuild of sci-electronics/kicad by placing it in /etc/portage/package.accept_keywords (which indirectly requires dev-python/wxpython there too)
This supports python 3.12 and will be less of a headache than trying to use a stable which is python 3.11 or less.
On the other hand, if version 8 is undesirable for a different technical reason, then the only choice is to enable the python3_11 single target and disable the python3_12 single target in package.use. This will then cascade down the python chain, often quite deep. |
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lars_the_bear
Guru
Joined: 05 Jun 2024
Posts: 522
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| Posted: Thu Jun 27, 2024 5:09 pm Post subject: |
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OK, thanks. I have started installing it. Looks like it could take a while.
KiCAD has a dependency on WxWidgets, which I kind-of understand. But do you know, or does anybody know, why WxWidgets had a dependency on GStreamer? KiCAD is not (so far as I know) known for its media capabilities. I can't see why it would need GStreamer, even indirectly.
GStreamer is one of the things I usually avoid; not for any good reason, but because I assume that anything so closely associated with Gnome must be bad  It's a pretty substantial thing to have to compile from source, if you don't need it.
BR, Lars. |
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eschwartz
Developer
Joined: 29 Oct 2023
Posts: 228
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| Posted: Fri Jun 28, 2024 1:48 am Post subject: |
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From the ebuild:
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# wxPython doesn't seem to be able to optionally disable features. webkit is
# optionally patched out because it's so huge, but other elements are not,
# which makes us have to require all features from wxGTK
DEPEND="
>=x11-libs/wxGTK-3.0.4-r301:${WX_GTK_VER}=[gstreamer,libnotify,opengl,sdl,tiff,webkit?,X]
....
python_prepare_all() {
if ! use webkit; then
eapply "${FILESDIR}/${PN}-4.2.0-no-webkit.patch"
fi
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Perhaps you could convince upstream to add a build option for disabling gstreamer. |
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lars_the_bear
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Joined: 05 Jun 2024
Posts: 522
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| Posted: Fri Jun 28, 2024 6:53 am Post subject: |
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| eschwartz wrote: |
Perhaps you could convince upstream to add a build option for disabling gstreamer. |
To be honest, alongside the colossal size of KiCAD, the 50Mb or so of GStreamer is a drop in the ocean.
KiCAD 8 does work on my system, after twelve hours of compilation; but it's not as fast as 7.0.9, which is what I've used up until now. But isn't that always the case?
BR, Lars. |
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