[MacPorts] #63699: openldap-devel @2.6.0: build fails on 10.5 PPC

[MacPorts]

#63699: openldap-devel @2.6.0: build fails on 10.5 PPC
-----------------------------+----------------------
  Reporter:  mascguy         |      Owner:  mascguy
      Type:  defect          |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:
Resolution:                  |   Keywords:  ppc
      Port:  openldap-devel  |
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Comment (by evanmiller):

 Well, I'm hoping to figure out which GCC versions choke on the
 redefinitions. Then we can write a blacklist as narrow as possible so that
 we don't necessarily have to require GCC7, just blacklist whatever won't
 compile openldap-devel.

 Usually the blacklists take the form {{{*gcc-3.* *gcc-4.*}}} but I'd like
 to figure out if GCC5/6 are okay, and likewise if GCC 4.5, 4.6, etc should
 be allowed.

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Ticket URL: <https://trac.macports.org/ticket/63699#comment:9>
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