[MacPorts] #52575: Report Xcode version and other useful information in main.log

[MacPorts]

#52575: Report Xcode version and other useful information in main.log
-------------------------+--------------------------------
 Reporter:  mojca@…      |      Owner:  macports-tickets@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  base         |    Version:  2.3.4
 Keywords:               |       Port:
-------------------------+--------------------------------
 I would find it useful if main.log listed the version of Xcode (and
 version of the corresponding Command Line Tools when applicable) as well
 as compiler version.

 Other pieces of information might be useful as well, perhaps:
 * the file always lists `i386`, it would be more useful to list the actual
 platform
 * list of default variants (some users might perhaps have `+quartz -x11`
 being set)
 * settings like `prefix`, whether the user has switched to `libc++`, which
 compiler is default in case of `libc++`, ...

 (It's nearly impossible to search for a ticket like this one, so I'm sorry
 if this is a duplicate.)

-- 
Ticket URL: <https://trac.macports.org/ticket/52575>
MacPorts <https://www.macports.org/>
Ports system for the Mac operating system