Gentoo Archives: gentoo-dev

From: Christopher Head <chead@×××××.ca>
To: gentoo-dev@l.g.o
Subject: Re: [gentoo-dev] Moving CPU flags into USE_EXPAND
Date: Wed, 14 Jan 2015 18:10:55
Message-Id: A60BBA99-49E0-44A4-B18B-1D4572681051@chead.ca
In Reply to: Re: [gentoo-dev] Moving CPU flags into USE_EXPAND by Alexis Ballier
1 On January 14, 2015 7:16:46 AM PST, Alexis Ballier <aballier@g.o> wrote:
2 >however, i disagree with your rationale: asm for specific cpu
3 >extensions tend to be written and tested after given cpu is available,
4 >thus if you have a brand new cpu, you want to be notified if a package
5 >gains support for this new instruction set
6
7 Do people really want to be notified if a package gains support for a new instruction set? I know I don’t. I would rather have all possible instruction set extensions available as flags and set whichever ones my CPU has once, at install time. If a package gains support for an extension later, then whenever it upgrades, it will just work, because the relevant flag will already be set in make.conf from back when I installed Gentoo on the box.
8
9 For this to work right requires that a dev add all the extensions to the flag before I buy the CPU. All that requires is knowing the names, though; it would be fine if no package actually uses the feature yet.
10
11 --
12 Christopher Head

Replies

Subject Author
Re: [gentoo-dev] Moving CPU flags into USE_EXPAND Zac Medico <zmedico@g.o>
[gentoo-dev] Re: Moving CPU flags into USE_EXPAND Martin Vaeth <martin@×××××.de>