[MacPorts] #29145: llvm: don't use a versioned docdir

[MacPorts]

#29145: llvm: don't use a versioned docdir
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 Reporter:  ryandesign@…             |       Owner:  mfeiri@…           
     Type:  enhancement              |      Status:  assigned           
 Priority:  Normal                   |   Milestone:                     
Component:  ports                    |     Version:  1.9.2              
 Keywords:  haspatch                 |        Port:  llvm               
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Changes (by mfeiri@…):

  * owner:  erickt@… => mfeiri@…
 * cc: mfeiri@… (removed)
 * cc: erickt@… (added)
  * status:  new => assigned


Comment:

 I think this patchfile is included for historic reasons only and under
 normal circumstances I'd support every effort to reduce deviations from
 upstream. But in this case I think we need to think about _fully_
 versioned ports of llvm. The llvm-gcc42 compiler just reached its end-of-
 life and will continue to depend on llvm version 2.9 while our llvm port
 will move on to newer versions. I currently see three options:

 a) llvm29, llvm30, llvm31, .... where each port conflicts the other ports.
 This will frequently require manual conflict resolution during upgrades of
 dependent ports (e.g. clang).

 b) llvm29, llvm30, llvm31, .... where each port installs headers in
 versioned subdirectories and renames executables with versioned suffixes.
 Notify users about this and patch dependent ports to use these specific
 directories/executables. Maybe introduce something like a llvm_select
 tool.

 c) Continue the llvm port as is but do not support llvm as a build
 dependency. Notify users about this and change all dependent ports to
 build their own compatible version of llvm and link statically

 None of these options seems particularly attractive. Suggestions?

-- 
Ticket URL: <https://trac.macports.org/ticket/29145#comment:2>
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