[MacPorts] #61612: xorg-lib11 @1.7.0 variant +docs does not build on El Capitan, OK on Big Sur (Java problem?)

[MacPorts]

#61612: xorg-lib11 @1.7.0 variant +docs does not build on El Capitan, OK on Big Sur
(Java problem?)
--------------------------+----------------------
  Reporter:  snowflake    |      Owner:  jeremyhu
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.6.99
Resolution:               |   Keywords:
      Port:  xorg-libx11  |
--------------------------+----------------------

Comment (by snowflake):

 For both the El Capitan and Big Sur builds I was using JAVA_HOME set to
 openjdk8.

 On El Capitan, I set JAVA_HOME to openjdk14-openj9.  The build now
 succeeds on El Capitan.

 Why openjdk8 works on Big Sur but not on El Capitan is a mystery to me at
 least.

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Ticket URL: <https://trac.macports.org/ticket/61612#comment:1>
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