[MacPorts] #40194: muniversal: pre-merge hook for each destroot

[MacPorts]

#40194: muniversal: pre-merge hook for each destroot
------------------------+--------------------------------
 Reporter:  jeremyhu@…  |      Owner:  macports-tickets@…
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.2.0
 Keywords:              |       Port:
------------------------+--------------------------------
 We should have a hook that is executed for each arch's destroot prior to
 merging them in the muniversal PortGroup.

 This would give us a good place to fix conflicts such as this one in
 mpich:
 {{{
 $ diff -Naurp
 /opt/local/var/macports/build/_Users_jeremy_src_macports_trunk_dports_science_mpich/mpich/work/destroot-{i386,x86_64}/opt/local/lib/pkgconfig/mpich.pc
 ---
 /opt/local/var/macports/build/_Users_jeremy_src_macports_trunk_dports_science_mpich/mpich/work/destroot-i386/opt/local/lib/pkgconfig/mpich.pc
 2013-08-20 09:31:01.000000000 -0700
 +++
 /opt/local/var/macports/build/_Users_jeremy_src_macports_trunk_dports_science_mpich/mpich/work
 /destroot-x86_64/opt/local/lib/pkgconfig/mpich.pc     2013-08-20
 09:30:58.000000000 -0700
 @@ -9,12 +9,12 @@ Description: High Performance and portab
  Version: 3.0.4
  URL: http://www.mcs.anl.gov/research/projects/mpich
  Requires:
 -Libs:  -L/opt/local/lib -Wl,-headerpad_max_install_names -arch i386
 -Wl,-flat_namespace -L${libdir} -lpmpich -lmpich -lopa -lmpl  -lpthread
 -Cflags:   -pipe -Os -arch i386  -I${includedir}
 +Libs:  -L/opt/local/lib -Wl,-headerpad_max_install_names -arch x86_64
 -Wl,-flat_namespace -L${libdir} -lpmpich -lmpich -lopa -lmpl  -lpthread
 +Cflags:   -pipe -Os -arch x86_64  -I${includedir}

  # pkg-config does not understand Cxxflags, etc. So we allow users to
  # query them using the --variable option

 -cxxflags=  -pipe -Os -arch i386  -I${includedir}
 -fflags=-pipe -Os -m32  -I${includedir}
 -fcflags=-pipe -Os -m32  -I${includedir}
 +cxxflags=  -pipe -Os -arch x86_64  -I${includedir}
 +fflags=-pipe -Os -m64  -I${includedir}
 +fcflags=-pipe -Os -m64  -I${includedir}
 }}}

 We just need to strip the arch specific CFLAGS out of the pkgconfig file,
 but we have no good place to do that.

-- 
Ticket URL: <https://trac.macports.org/ticket/40194>
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