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On Tue, 18 Mar 2008 10:21:49 +0100 |
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"Fabio Erculiani" <lxnay@××××××××××××.org> wrote: |
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> Example: |
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> x11-libs/qt:* |
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> |
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> In that case, what Paludis will pull? x11-libs/qt:3 or x11-libs/qt:4 ? |
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> Is my understanding right? |
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> Also, could you make an example for the ":= slot dependency" syntax? |
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|
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See the section "Slot Dependencies" in chapter 9 of |
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http://www.mailstation.de/pms.pdf . |
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In non technical terms: |
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:* means, effectively, that the slot isn't locked at compile time, and |
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that if you build a package against foo:2, it will work at runtime |
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with foo:1 or foo:3 instead. Examples of this are many things that don't |
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do C-style linking. |
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|
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:= means, effectively, that the slot is locked at compile time. An |
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example of this is a package that can use any version of 'db' -- the |
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package can often compile against any version of db, but if you remove |
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the slot of the db version against which the package was built, the |
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package will break. |
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It's used by Paludis as a hint to --uninstall and --uninstall-unused. |
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For normal dependencies, Paludis takes the safe option and assumes that |
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if something has a run dep upon foo, all installed slots of foo are |
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used. Using :* dependencies relaxes that restriction to any slot. |
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Using := dependencies changes that restriction to one specific slot. |
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|
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-- |
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Ciaran McCreesh |
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