Is binary repositories necessarily?

[justguy]

I have question if i dont put any binary mirrors in make.conf, but have official gentoo mirrors will it still install binary packages?

[fedeliallalinea]

No except if the package in the official non binary repository is not a binary of its own (like google-chrome, firefox-bin and other non-open source packages).

[justguy]

because i cannot access any binary repository URL (means i get error 404 then trying enter url)

[Hu]

justguy: when you have a question, please describe specifically what you intend to do or change. In this case, I would rewrite your initial question as:

If I leave PORTAGE_BINHOST blank, and I want to use FEATURES=getbinpkg, what happens?

Assuming that is your question, then I would first observe the note in man 5 make.conf:

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The
              PORTAGE_BINHOST variable is deprecated in favor  of  the  binre‐
              pos.conf configuration file (see portage(5)).

Setting that aside, I would expect the answer is that FEATURES=getbinpkg is ineffective without a binhost from which to obtain binpkgs. Ordinary Portage packages with a -bin suffix can still be installed "from source" - but note that for such packages, the source is itself just precompiled files.

[justguy]

Thank u PORTAGE_BINHOST is important then enabling binary packages feature

[justguy]

But idk for some reasons all working fine if i dont specify PORTAGE_BINHOST all still get binary packages i think because i have regular mirrors

[Hu]

In that case, perhaps my earlier speculation is wrong. I expected that FEATURES=getbinpkg would only work with PORTAGE_BINHOST set, but did not create a test environment to confirm it, and did not readily find documentation that confirmed or contradicted my expectation.

[NeddySeagoon]

Team,

The stage3 has a default binhost set.

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emerge --info

will show it.

From a Pi5 arm64 install

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...
Binary Repositories:

gentoobinhost
    priority: 1
    sync-uri: https://gentoo.osuosl.org/releases/arm64/binpackages/23.0/arm64
...

Others can be added too.