[MacPorts] #34498: llvm-3.x should add a variant to enable additional targets beyond those used on Apple hardware

[MacPorts]

#34498: llvm-3.x should add a variant to enable additional targets beyond those
used on Apple hardware
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 Reporter:  vince@…             |       Owner:  jeremyhu@…           
     Type:  enhancement         |      Status:  new                  
 Priority:  Normal              |   Milestone:                       
Component:  ports               |     Version:  2.1.0                
 Keywords:  llvm                |        Port:  llvm-3.0, llvm-3.1   
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 The llvm-3.x ports as written today compile backends for a lot of targets
 (e.g.: MIPS, Alpha) which are totally useless on Apple hardware. Compiling
 those backends take a lot of time, and, on 2 GB machines, the final
 linking exceed the amount of available memory, which causes tons of swap
 and speed the building further down. I therefore suggest that, by default,
 llvm-3.x ports do only build "useful" backends (x86, x86_64, powerpc, arm)
 and that the other ones be left out except if the user chooses a dedicated
 variant (e.g. +alltargets).

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Ticket URL: <https://trac.macports.org/ticket/34498>
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