[MacPorts] #59712: subversion @1.13.0 runs svnversion during the build, which fails

[MacPorts]

#59712: subversion @1.13.0 runs svnversion during the build, which fails
------------------------+------------------------
 Reporter:  ryandesign  |      Owner:  danielluke
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.6.2
 Keywords:              |       Port:  subversion
------------------------+------------------------
 subversion evidently runs the just-built svnversion at some point during
 the build. This crashes, because the libraries it's linked with haven't
 been installed yet, and I guess it's not setting DYLD_LIBRARY_PATH to the
 path where they were built. (I assume that the fix will be setting that
 variable.)

 This does not cause the build of subversion to fail, but whatever it's
 running svnversion for can't be getting the correct result. Whether that's
 important, I don't know.

 On old Mac OS X versions like 10.6 that ship with an old copy of
 subversion, the failure is:

 {{{
   Symbol not found: _svn_pool_create_allocator
   Referenced from:
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_subversion/subversion/work/subversion-1.13.0/subversion/svnversion/svnversion
   Expected in: /usr/lib/libsvn_subr-1.0.dylib
 }}}

 On new macOS versions like 10.14 that don't ship with subversion, the
 failure is:

 {{{
   Library not loaded: /opt/local/lib/libsvn_wc-1.0.dylib
   Referenced from: /opt/local/var/macports/*/svnversion
   Reason: image not found
 }}}

 Attached are two crash logs I found on our buildbot workers.

-- 
Ticket URL: <https://trac.macports.org/ticket/59712>
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