[PostGIS] #5934: PostGIS fails to build with PostgreSQL v19

[PostGIS]

#5934: PostGIS fails to build with PostgreSQL v19
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  Reporter:  Laurenz Albe  |      Owner:  strk
      Type:  defect        |     Status:  new
  Priority:  medium        |  Milestone:  PostGIS 3.5.4
 Component:  build         |    Version:  3.5.x
Resolution:                |   Keywords:
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Comment (by pramsey):

 This patch seems to have been applied, but I'm not sure why we even have
 those ifdefs... nobody is exporting those symbols from PgSQL, and when
 they *do* they we can fix the breakage with an ifdef that won't go out of
 date.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5934#comment:1>
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