[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):

 Replying to [comment:4 breun]:
 > Maybe `ruby-build` also needs a MacPorts version of this feature?

 I would not consider that to be desirable. Instead of projects making
 assumptions about what different package managers the user might be using,
 there should be a simple straightforward method of detecting dependencies,
 like pkg-config, or a way that the user (or package manager) can specify
 where the dependency they want to use is located.

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Ticket URL: <https://trac.macports.org/ticket/69604#comment:6>
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