[MacPorts] #28001: MacPorts base could support out-of-source builds, or tell user that it doesn't

[MacPorts]

#28001: MacPorts base could support out-of-source builds, or tell user that it
doesn't
---------------------------------+------------------------------------------
 Reporter:  julians37@…          |       Owner:  macports-tickets@…                   
     Type:  enhancement          |      Status:  new                                  
 Priority:  Low                  |   Milestone:                                       
Component:  base                 |     Version:  1.9.2                                
 Keywords:                       |        Port:                                       
---------------------------------+------------------------------------------
 Packages that have been properly autoconfiscated will usually support out-
 of-source build, i.e. the following will work:

 {{{
   cd /some/build/directory
   /path/to/configure
   make install
 }}}

 For MacPorts base it doesn't and fails with the somewhat obscure error
 message

 {{{
 Makefile:32: Mk/macports.subdir.mk: No such file or directory
 }}}

 It would be nice if MacPorts would either support building in a directory
 other than the source directory, or alternatively fail fast (in
 {{{configure}}}) with a more informative error message.

-- 
Ticket URL: <https://trac.macports.org/ticket/28001>
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