[PostGIS] #6112: README.postgis does not document gmp requirement

[PostGIS]

#6112: README.postgis does not document gmp requirement
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  Reporter:  gdt      |      Owner:  pramsey
      Type:  defect   |     Status:  closed
  Priority:  low      |  Milestone:  PostGIS 3.7.0
 Component:  postgis  |    Version:  master
Resolution:  fixed    |   Keywords:
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Comment (by Darafei Praliaskouski <komzpa@…>):

 In [changeset:"ac50b1860aafaa3aa7dbc24466db64d01b1ea88a/git"
 ac50b186/git]:
 {{{#!CommitTicketReference repository="git"
 revision="ac50b1860aafaa3aa7dbc24466db64d01b1ea88a"
 Merge pull request 'docs: document GMP build dependency' (!726) from
 Komzpa/postgis:codex/ticket-6112-readme-gmp into master

 README.postgis now documents the current build dependency contract and
 points readers at the generated compatibility browser for the maintained
 support matrix. It updates PostgreSQL 14+, libgmp-dev and pkg-config in
 the apt dependency example, GDAL 2.4+ for raster builds, SFCGAL minimum
 /full-feature wording, and the compatibility-browser-derived iconv,
 gettext, protobuf-c, and GTK classifications.

 The same dependency-version sweep also updates current manual/release
 docs: NEWS records the #6112 README dependency documentation fix for
 3.7.0rc1, doc/postgis.xml carries the current PostgreSQL and GEOS entity
 values, installation docs align GEOS/GDAL/SFCGAL wording,
 release_notes.xml uses PostgreSQL 19beta2, and the dependency guard
 example uses the current SFCGAL 2.3 threshold.

 Closes https://trac.osgeo.org/postgis/ticket/6112
 Closes #6112

 Reviewed-on: https://gitea.osgeo.org/postgis/postgis/pulls/726
 }}}
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6112#comment:3>
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