[MacPorts] #28276: arb: Upgrade to 5.2

[MacPorts]

#28276: arb: Upgrade to 5.2
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 Reporter:  matt.cottrell@…       |       Owner:  macports-tickets@…                   
     Type:  update                |      Status:  new                                  
 Priority:  Normal                |   Milestone:                                       
Component:  ports                 |     Version:  1.9.2                                
 Keywords:  libpng                |        Port:  arb                                  
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Comment(by ryandesign@…):

 * r75953: consolidate configure.env into build.env

 Replying to [comment:10 matt.cottrell@…]:
 > Allow build_arch x86_64 only.  Prompt the user to confirm that
 build_arch is set properly in macports.conf.   User may have forgotten to
 update build_arch after upgrading the OS to a 64-bit version.

 I don't think we want that. What if the user's system really is 32-bit
 only -- as in, PowerPC G4 or Intel Core (not Core 2)? What if the user is
 on Leopard or Tiger, where 32-bit building is the default? If this
 software will not work well as 32-bit, you could write a `ui_warn` at pre-
 configure time alerting the user to this fact, but I would not prevent the
 build if the software will technically work 32-bit. If you like, you can
 tailor the message based on whether the user's computer supports 64-bit.
 MacPorts uses `sysctl hw.cpu64bit_capable` to determine this; if it prints
 "1" the CPU is 64-bit capable; if it shows "0", then it's not. If it's
 "1", your message could advise the user to change build_arch; if it's "0",
 you could tell the user to buy a new computer. :) In any case, do not
 hardcode /opt/local; use ${prefix}.

 As I work to commit these individual pieces, evaluating your monolithic
 diffs against the original portfile becomes more difficult. For future
 proposed changes, please supply a diff against the current port in the
 repository making only those changes.

-- 
Ticket URL: <https://trac.macports.org/ticket/28276#comment:11>
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