[MacPorts] #57294: libkdegames @4.14.3: 'al.h' file not found

[MacPorts]

#57294: libkdegames @4.14.3: 'al.h' file not found
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  Reporter:  rlhamil      |      Owner:  NicosPavlov
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.5.4
Resolution:               |   Keywords:  mojave
      Port:  libkdegames  |
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Comment (by rlhamil):

 Wow, you may have the answer there!  Not only did libkdegames build, but
 with that in place, all the ports brought in by kdegames4 built just fine.

 While I doubt those options would hurt anything even if the directory did
 not exist on an older OS version, can those directives be made conditional
 on the OS version (e.g. os.version 18.0.0 or later)?
 If possible, that would IMO be highest confidence that no older versions
 where it works now would be affected.

-- 
Ticket URL: <https://trac.macports.org/ticket/57294#comment:4>
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