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On Friday 23 December 2011 11:44:32 Duncan wrote: |
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> Matt Turner posted on Fri, 23 Dec 2011 08:09:30 -0500 as excerpted: |
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> > to avoid confusion I'd suggest arch-neon or arm-neon (or armneon/ |
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> >> archneon) if it's to be a global flag. |
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> > |
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> > NEON (the SIMD extensions) are turned on by the neon flag much more |
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> > often than support for net-libs/neon is. Let's not rename USE flags like |
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> > this. |
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> |
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> I'd argue that the library is far more frequently used, given that it's |
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> used across archs and arm is (for the time being, that seems to be |
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> gradually changing) still a rather obscure arch (for end-user installed |
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> distros, anyway), so the neon library is likely the most frequently used. |
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> |
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> However you are probably correct about the USE flag, as the library usage |
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> seems to be required in many cases and thus not USE-flaggable. |
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> |
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> So I'd still argue that to prevent confusion... but it's not something I |
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> feel strongly about, so given no one else objecting, use=neon for the simd |
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> extensions works as a global USE flag, and if it's ever used for the net- |
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> lib, that one can change I guess. |
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if we're going to arch namespace flags, we should do it for all of them. i |
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probably wouldn't complain about that (although i'd prefer more of an ISA |
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prefix than Gentoo $ARCH), but doing it for one flag is not nice. |
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i agree that for some users, they've never heard of the the ARM NEON |
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extensions, but they have heard of the neon library. i'd counter that with a |
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few points: (1) i don't think there are any packages in the tree that have |
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optional neon (the library) support (2) people are good at reading `quse -D |
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neon` (3) the flag is masked everywhere except for ARM ports, so people can't |
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really bite themselves. |
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-mike |
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