[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@…):

 Sorry for the noise. Turns out that the documentation doesn’t describe the
 behavior very well: Specifying the goals on the command line simply adds
 them  (in order) to the list of targets to be run, so parallel building
 behavior applies to them as usual.
 {{{
 % >test.makefile <<EOF
 heredoc> .PHONY: foo bar baz
 heredoc>
 heredoc> foo:
 heredoc>        @echo foo start!
 heredoc>        @sleep 10
 heredoc>        @echo foo end!
 heredoc>
 heredoc> bar:
 heredoc>        @echo bar start!
 heredoc>        @sleep 5
 heredoc>        @echo bar end!
 heredoc>
 heredoc> baz:
 heredoc>        @echo baz start!
 heredoc>        @sleep 2
 heredoc>        @echo baz end!
 heredoc> EOF
 % make -f test.makefile foo bar baz
 foo start!
 foo end!
 bar start!
 bar end!
 baz start!
 baz end!
 % make -f test.makefile -j 8 foo bar baz
 foo start!
 bar start!
 baz start!
 baz end!
 bar end!
 foo end!
 %
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/45274#comment:3>
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