[MacPorts] #54993: Processing of port openmpi-gcc7 failed

[MacPorts]

#54993: Processing of port openmpi-gcc7 failed
---------------------------+------------------------
  Reporter:  ogourgue      |      Owner:  seanfarley
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.4.1
Resolution:                |   Keywords:  highsierra
      Port:  openmpi-gcc7  |
---------------------------+------------------------

Comment (by aivazis):

 the problem is caused by an incorrectly configured access to syslog.

 syslog.h fails to compile during configuration, leaving HAVE_SYSLOG set to
 1, without HAVE_SYSLOG_H, which causes LOG_PRI and its sisters to be
 undefined.

 the following fails to compile with gcc(6|7) on high sierra:

 {{{
 // include the problem
 #include <syslog.h>

 // entry point
 int main() {
     // all done
     return 0;
 }

 }}}

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Ticket URL: <https://trac.macports.org/ticket/54993#comment:2>
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