[MacPorts] #69604: ruby-build fails with fatal error: 'yaml.h' file not found

[MacPorts]

#69604: ruby-build fails with fatal error: 'yaml.h' file not found
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  Reporter:  breun       |      Owner:  mojca
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  ruby-build  |
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Comment (by ryandesign):

 It looks like rbenv is installing its own private copy of openssl first.
 If rbenv's intention is to be self-contained, then I guess it should
 either be installing its own private copy of libyaml or else telling ruby
 not to use libyaml, if that's possible. These would be bugs to report to
 the developers of rbenv. Or if they are not intending to be self-
 contained, then hopefully they have documentation explaining how to inform
 rbenv about the location of your copy of libyaml and anything else that's
 needed.

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Ticket URL: <https://trac.macports.org/ticket/69604#comment:3>
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