[MacPorts] #59397: openssh @8.1_1: fails to build on 10.6: audit-bsm.c:66:10: fatal error: 'bsm/audit_session.h' file not found

[MacPorts]

#59397: openssh @8.1_1: fails to build on 10.6: audit-bsm.c:66:10: fatal error:
'bsm/audit_session.h' file not found
-------------------------+-------------------------
  Reporter:  grumpybozo  |      Owner:  Ionic
      Type:  defect      |     Status:  accepted
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.6.1
Resolution:              |   Keywords:  snowleopard
      Port:  openssh     |
-------------------------+-------------------------

Comment (by kencu):

 Replying to [comment:4 grumpybozo]:
 > FWIW:  It builds just fine without  this patch: 0002-Apple-keychain-
 integration-other-changes.patch
 Thanks! That is very helpful information. I was trying to figure out why
 it kept forcing the use of the keychain.m file even with the `-use-
 keychain=apple` flag taken away.

 memmem is replacable via `legacysupport` if that is needed.

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Ticket URL: <https://trac.macports.org/ticket/59397#comment:6>
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