[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 grumpybozo):

 Replying to [comment:9 Ionic]:
 > Okay... I think that `audit_session.h` was introduced with 10.7, if I
 read launchd and other source code correctly.

 Definitely somewhere between 10.7 and 10.9

 > Just for fun: does `grep -HRE 'IS_REMOTE|HAS_TTY|HAS_AUTHENTICATED'
 /usr/include/bsm` return anything useful?

 It returns nothing. There are no AU_SESSION_* constants defined in any
 bsm/* headers on 10.6.8

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Ticket URL: <https://trac.macports.org/ticket/59397#comment:10>
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