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On 02/11/2016 04:01 PM, William Hubbs wrote: |
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> I'm just picking a random message in the thread to reply to. |
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> |
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> In the past, we had a feature, I think it was called "auto use", |
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> that would automatically turn on a use flag if the package that was |
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> needed to support it was installed. |
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> |
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> As an example, if we still had this, python_targets_2_7 would be |
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> automatically turned on if dev-lang/python-2.7 was installed. |
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> |
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> Is this along the lines of what we are talking about? |
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> |
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> William |
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> |
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No, lazy USE in this discussion is akin to installing, say, Steam. |
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That requires a lot of packages that must be rebuilt with abi_x86_32. |
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In such a situation, if there was something like USE="~abi_x86_32" |
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(the ~ is just a symbol, it wouldn't have to be that exact symbol), |
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then packages that need that USE flag would automatically use it, and |
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those that don't need it wouldn't be built with it. |
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It's kind of a "I'll allow this USE flag, but only if you need it" |
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instead of what we currently have, which is a hard YES or NO. The |
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in-between case (not clarifying USE flags at all) works fine for |
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packages but not necessarily for USE flags. Installing something like |
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Steam, wine, or Skype requires a huge swath of abi_x86_32 flags. |
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|
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I and others get around this by partitioning these flags to files, but |
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should something in dependencies change, we'll still be building those |
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packages in 32-bit unnecessarily. |
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|
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So it's closer to what we do for dependency resolution on packages, |
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just applied to USE flags. |
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(hopefully I explained well enough) |
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- -- |
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Daniel Campbell - Gentoo Developer |
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OpenPGP Key: 0x1EA055D6 @ hkp://keys.gnupg.net |
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fpr: AE03 9064 AE00 053C 270C 1DE4 6F7A 9091 1EA0 55D6 |
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