[PostGIS] #6036: Use PG_MODULE_MAGIC_EXT for Pg18+

[PostGIS]

#6036: Use PG_MODULE_MAGIC_EXT for Pg18+
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  Reporter:  pramsey      |      Owner:  pramsey
      Type:  enhancement  |     Status:  closed
  Priority:  medium       |  Milestone:  PostGIS 3.7.0
 Component:  postgis      |    Version:  master
Resolution:  fixed        |   Keywords:
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Changes (by Paul Ramsey <pramsey@…>):

 * resolution:   => fixed
 * status:  assigned => closed

Comment:

 In [changeset:"c460d6928c131cc0ae973200afacfa8c47cc4953/git" c460d69/git]:
 {{{#!CommitTicketReference repository="git"
 revision="c460d6928c131cc0ae973200afacfa8c47cc4953"
 Add use of PG_MODULE_MAGIC_EXT for pg>=18

 Allows server to poll the version and extension name from the
 dynamically loaded library. Potentially could perform the
 same scripts-vs-libs version check we do, but on all
 extensions. Automatic update, could we have?

 Closes #6036
 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6036#comment:2>
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