[MacPorts] #54365: gnudatalanguage port: dependency eigen3 fails to configure on OS 10.12

[MacPorts]

#54365: gnudatalanguage port: dependency eigen3 fails to configure on OS 10.12
----------------------------+-----------------------------
 Reporter:  TimArnold       |      Owner:
     Type:  defect          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:
 Keywords:  eigen3 OS10.12  |       Port:  gnudatalanguage
----------------------------+-----------------------------
 --->  Configuring eigen3
 Error: Failed to configure eigen3: configure failure: command execution
 failed
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_math_eigen3/eigen3/main.log
 for details.
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 Error: Processing of port gnudatalanguage failed

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Ticket URL: <https://trac.macports.org/ticket/54365>
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