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On Fri, 11 Dec 2020 at 19:09, Alan Mackenzie <acm@×××.de> wrote: |
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> emerge: there are no ebuilds built with USE flags to satisfy "dev-python/pycparser[python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,python_targets_python3_9(-)?,-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-),-python_single_target_python3_9(-)]". |
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> !!! One of the following packages is required to complete your request: |
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> - dev-python/pycparser-2.20-r1::gentoo (Change USE: +python_targets_python3_7) |
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> - dev-python/cffi-1.14.0-r3::gentoo (Change USE: -python_targets_python3_7) |
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> (dependency required by "dev-python/cffi-1.14.0-r3::gentoo" [ebuild]) |
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> (dependency required by "dev-python/bcrypt-3.2.0::gentoo" [installed]) |
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> (dependency required by "dev-python/paramiko-2.7.1::gentoo" [installed]) |
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> (dependency required by "dev-vcs/bzr-2.7.0::gentoo" [installed]) |
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> (dependency required by "@selected" [set]) |
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> (dependency required by "@world" [argument]) |
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|
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To solve your problem, you already have your answer (remove |
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dev-vcs/bzr), but I don't think you got the explanation you wanted for |
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the logic of this output, so I'll also give it a go. |
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|
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I would really ignore the first line with all the brackets and |
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question marks unless you are completely unable to fix your problem, |
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but the logic of the rest of the lines, as I understand them, is as |
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follows: |
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|
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Your problem has two possible solutions, either ADD py3.7 |
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(USE="python_targets_python3_7") to dev-python/pycparser, or REMOVE |
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py3.7 (USE="-python_targets_python3_7") to dev-python/cffi. |
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|
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This is required by dev-python/cffi-1.14.0-r3::gentoo. |
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Which in turn is required by dev-python/bcrypt-3.2.0::gentoo. |
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Which in turn is required by dev-python/paramiko-2.7.1::gentoo |
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Which in turn is required by dev-vcs/bzr-2.7.0::gentoo |
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Which in turn is required by the selected packages which the current |
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emerge command was given |
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Which in turn was found through the emerge argument @world |
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|
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In other words, the "dependency of A on B" you speak about is clearly |
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outlined here, but it is as a chain of dependencies, and hence spread |
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out over multiple lines, which in my opinion for these kinds of things |
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actually makes it more readable. But of course, you have to first know |
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what is trying to express, before you can decipher the syntax. |
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|
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Regards, |
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Arve |
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