[MacPorts] #22557: MacPorts base should verify build_arch has a sensible value

[MacPorts]

#22557: MacPorts base should verify build_arch has a sensible value
-------------------------------------+--------------------------------------
 Reporter:  ryandesign@…             |       Owner:  macports-tickets@…                   
     Type:  defect                   |      Status:  new                                  
 Priority:  Normal                   |   Milestone:  MacPorts Future                      
Component:  base                     |     Version:  1.8.1                                
 Keywords:                           |        Port:                                       
-------------------------------------+--------------------------------------
 build_arch is meant to contain a single architecture value only. If the
 user sets build_arch to a nonsense value like "i386 x86_64" or "green",
 ports quite understandably fail to compile. (See #22534 for an example.)
 MacPorts base should prevent user confusion by verifying that build_arch
 contains a valid value. Attempting to cross-compile using build_arch is
 probably also a bad idea, so the valid values should probably be "i386" or
 "x86_64" on Intel Macs and "ppc" or "ppc64" on PowerPC Macs. We could
 consider allowing "ppc" on Intel Macs as well due to Rosetta.

-- 
Ticket URL: <http://trac.macports.org/ticket/22557>
MacPorts <http://www.macports.org/>
Ports system for Mac OS