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W dniu pon, 19.02.2018 o godzinie 21∶32 +0200, użytkownik Mart Raudsepp |
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napisał: |
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> On Mon, 2018-02-19 at 18:34 +0100, Ulrich Mueller wrote: |
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> > > > > > > On Mon, 19 Feb 2018, Michael Lienhardt wrote: |
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> > > > |
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> > > > 2. ||= (binding any-of) dep groups. |
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> > > |
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> > > I don't understand what this group means, and the PMS-7 is unclear |
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> > > as well: |
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> > > "binding-any-of A binding-any-of group, which has the same format |
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> > > as the any-of group, but begins with the string ||= instead." |
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> > > Is it a "or", like the "any-of" group, but with a different |
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> > > behavior |
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> > > at compiling/linking time? |
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> > |
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> > It is explained in section 8.2.4: |
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> > https://dev.gentoo.org/~ulm/pms/7-draft/pms.html#x1-800008.2.4 |
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> |
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> Maybe I missed this, but a real world use case example would be nice, |
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> maybe someone feels a harder itch to scratch then :) |
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> |
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The original use case was for providers-like thingies, e.g.: |
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||= ( ffmpeg:0= libav:0= ) |
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That said, I'd personally prefer doing that with proper USE_EXPAND |
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and REQUIRED_USE enforcing but this has been rejected. |
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-- |
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Best regards, |
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Michał Górny |
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