[PostGIS] #5841: Pg18 changes pqsignal() return

[PostGIS]

#5841: Pg18 changes pqsignal() return
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  Reporter:  pramsey  |      Owner:  pramsey
      Type:  defect   |     Status:  closed
  Priority:  medium   |  Milestone:  PostGIS 3.5.3
 Component:  postgis  |    Version:  master
Resolution:  fixed    |   Keywords:
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Comment (by Darafei Praliaskouski <me@…>):

 In [changeset:"6f362a9a12525b6f39e7cbf4b580c1b97f1eeaf8/git"
 6f362a9a/git]:
 {{{#!CommitTicketReference repository="git"
 revision="6f362a9a12525b6f39e7cbf4b580c1b97f1eeaf8"
 Avoid pqsignal return value on PostgreSQL 18

 Backport the interrupt callback pattern used by newer stable branches so
 this older branch no longer depends on pqsignal returning the previous
 handler.

 References #5841
 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5841#comment:12>
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