[MacPorts] #45274: Run portbuild::build_main once for each build.target

[MacPorts]

#45274: Run portbuild::build_main once for each build.target
---------------------------+--------------------------------
  Reporter:  ryandesign@…  |      Owner:  macports-tickets@…
      Type:  enhancement   |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  base          |    Version:  2.3.99
Resolution:                |   Keywords:
      Port:                |
---------------------------+--------------------------------

Comment (by larryv@…):

 Admittedly, the part of the documentation
 [http://www.gnu.org/software/make/manual/html_node/Parallel.html#Parallel
 describing parallel execution] is not clear on this.

-- 
Ticket URL: <https://trac.macports.org/ticket/45274#comment:2>
MacPorts <http://www.macports.org/>
Ports system for OS X