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Fog_Watch
Apprentice
Joined: 24 Jul 2006
Posts: 267
Location: Utility Muffin Research Kitchen
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 Posted: Sat Jun 19, 2021 8:25 am Post subject: -zeroconf remedies my avahi-client sane error [SOLVED] |
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| Code: | | emerge =media-gfx/sane-backends-1.0.31-r2 |
returns
| Quote: | checking for avahi-client >= 0.6.24... no
configure: error: Avahi support requested but not found
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.
This is remedied with
| Code: | | USE=-zeroconf emerge =media-gfx/sane-backends-1.0.31-r2 |
Last edited by Fog_Watch on Sun Jun 20, 2021 12:23 am; edited 1 time in total |
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Hu
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Joined: 06 Mar 2007
Posts: 21633
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| Posted: Sat Jun 19, 2021 3:49 pm Post subject: |
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| Moved from DT&T to P&P, because this is not documentation. Fog_Watch: USE=zeroconf should work. The config.log should show why it failed to find Avahi support. If this package requires Avahi, Portage should have installed Avahi first. Therefore, either the ebuild lacks the required DEPEND, or your system is in a state that the DEPEND was satisfied, but Avahi still was not usable. Once we know which of those is true, we can move to either adjusting the ebuild or correcting your system's state. |
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Fog_Watch
Apprentice
Joined: 24 Jul 2006
Posts: 267
Location: Utility Muffin Research Kitchen
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| Posted: Sun Jun 20, 2021 12:23 am Post subject: |
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| Well done Hu, you smelt a rat, and you found it. My net-dns/avahi needed to be built with dbus. |
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Hu
Moderator
Joined: 06 Mar 2007
Posts: 21633
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| Posted: Sun Jun 20, 2021 12:50 am Post subject: |
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Nicely done. Now that you found what needs to be changed, we can examine to see why this was not handled automatically. media-gfx/sane-backends has some DEPEND relations on avahi, but I think with the right combination of USE flags, you could get this error. Dropping the irrelevant parts, we have: | Code: | sane_backends_escl? (
|| (
net-dns/avahi[dbus]
net-dns/avahi[gtk]
)
net-dns/avahi[${MULTILIB_USEDEP}]
)
zeroconf? ( >=net-dns/avahi-0.6.31-r2[${MULTILIB_USEDEP}] ) |
This says that Portage would have asked you to install avahi, but would not have asked you to set USE=dbus on it unless you had enabled SANE_BACKENDS=escl. I think that if that last relation is changed as below, Portage would warn on attempting to build a broken configuration. | Code: | @@ -165,7 +165,10 @@
usb? ( >=virtual/libusb-1-r1:1=[${MULTILIB_USEDEP}] )
v4l? ( >=media-libs/libv4l-0.9.5[${MULTILIB_USEDEP}] )
xinetd? ( sys-apps/xinetd )
- zeroconf? ( >=net-dns/avahi-0.6.31-r2[${MULTILIB_USEDEP}] )
+ zeroconf? (
+ net-dns/avahi[dbus]
+ >=net-dns/avahi-0.6.31-r2[${MULTILIB_USEDEP}]
+ )
"
DEPEND="${RDEPEND} |
Interestingly, this would simplify the earlier expression, since anyone with escl is required to set zeroconf. Therefore, if zeroconf required avahi[dbus], then the escl? ( avahi[dbus] ) part would be unnecessary. |
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