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On Sun, 25 Sep 2016 23:08:52 +0200 |
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Michał Górny <mgorny@g.o> wrote: |
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|
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> Hi, |
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> |
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> I'd like to introduce a new USE_EXPAND for LLVM & clang. It'd be named |
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> LLVM_TARGETS, and it's going to replace the current solution based on |
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> USE=multitarget & VIDEO_CARDS=radeon. |
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> |
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> In the old system, the following rules applied: |
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> |
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> - host (implicitly figured out by LLVM) and BPF targets were always |
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> built, |
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> |
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> - VIDEO_CARDS=radeon enabled additional R600 target, |
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> |
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> - USE=multitarget enabled all targets. |
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> |
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> In the new system, LLVM_TARGETS explicitly controls *all* targets |
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> built. To avoid dependency hell, the host target is package.use.forced |
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> in specific arch profiles. Additionally, the BPF target is on by |
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> default. |
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> |
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> The new system will be applied to 3.9.0 and 9999 ebuilds. VIDEO_CARDS |
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> flag will be removed completely because of no revdeps. USE=multitarget |
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> will be kept for compatibility until all revdeps are clean. |
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> |
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> As far as revdeps are concerned: |
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> |
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> - Packages that require only host target will not have to be changed at |
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> all (since host is still forced-on). |
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> |
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> - Packages that used to require multitarget will eventually have to be |
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> changed to request the specific targets they need. They could switch |
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> to this when they stop supporting LLVM < 3.9. |
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> |
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> The draft implementation is available in the following PR: |
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> https://github.com/gentoo/gentoo/pull/2405 |
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> |
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> Any comments? |
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|
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Committed now. |
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|
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-- |
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Best regards, |
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Michał Górny |
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<http://dev.gentoo.org/~mgorny/> |
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