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gksudo
n00b
Joined: 01 Nov 2020
Posts: 12
Location: england
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 Posted: Mon Jan 10, 2022 12:18 am Post subject: Setting compression USE flags globally |
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Hi, I'm preparing a kernel build with lz4 compression. Since I'm going to need app-arch/lz4 anyway, should I just set it globally along with some of the other compression packages I already have installed?
Is it safe or wise to use them together?
USE="lz4 lzo zstd"
It's prompting a few package rebuilds. Namely gcc, rsync, and some others. Because gcc takes a while to compile for me I'm looking for others views before I go ahead
thanks |
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Pietrog
Tux's lil' helper
Joined: 03 Jul 2021
Posts: 125
Location: Italy
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| Posted: Mon Jan 10, 2022 12:39 am Post subject: Re: Setting compression USE flags globally |
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| gksudo wrote: | Hi, I'm preparing a kernel build with lz4 compression. Since I'm going to need app-arch/lz4 anyway, should I just set it globally along with some of the other compression packages I already have installed?
Is it safe or wise to use them together?
USE="lz4 lzo zstd"
It's prompting a few package rebuilds. Namely gcc, rsync, and some others. Because gcc takes a while to compile for me I'm looking for others views before I go ahead
thanks |
If you require lz4 to change compression of the kernel and kernel modules then no. If you enable lz4 globally you're basically saying to enable support for lz4 compression in your apps where possible, if you don't care about this you can leave your make.conf as it is now. |
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mike155
Advocate
Joined: 17 Sep 2010
Posts: 4438
Location: Frankfurt, Germany
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| Posted: Mon Jan 10, 2022 8:49 am Post subject: |
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If you want to use lz4, just run
| Code: | | emerge app-arch/lz4 |
If you want other packages installed on your machine (like rsync, openvpn, systemd, subversion, wirkshark) to support lz4 as well, then define the USE flag "lz4".
Do NOT add USE flag "lz4" if you just want app-arch/lz4 to be installed on your machine.
EDIT: Pietrog was faster  |
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alamahant
Advocate
Joined: 23 Mar 2019
Posts: 3960
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| Posted: Mon Jan 10, 2022 9:46 am Post subject: |
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If the modules and the kernel will be compressed you will need
to enable compression in
Otherwise you will not be able to boot.
I dont think you need it globally unless you really want to.
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gksudo
n00b
Joined: 01 Nov 2020
Posts: 12
Location: england
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| Posted: Mon Jan 10, 2022 4:46 pm Post subject: |
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| Thanks for all the info. I went with xz compression as that was already installed (and requires by other packages) on the system |
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