[MacPorts] #18602: Prevent MacPorts from being configured with --prefix=/usr/local

[MacPorts]

#18602: Prevent MacPorts from being configured with --prefix=/usr/local
-------------------------------------+--------------------------------------
 Reporter:  ryandesign@…             |       Owner:  macports-tickets@…                   
     Type:  defect                   |      Status:  new                                  
 Priority:  Normal                   |   Milestone:  MacPorts 1.8.0                       
Component:  base                     |     Version:  1.7.0                                
 Keywords:                           |        Port:                                       
-------------------------------------+--------------------------------------
 MacPorts should not allow users to configure it with
 `--prefix=/usr/local`. Doing so surely breaks some ports, such as
 [comment:ticket:15778:3 macfuse].

-- 
Ticket URL: <http://trac.macports.org/ticket/18602>
MacPorts <http://www.macports.org/>
Ports system for Mac OS