[postgis-tickets] [PostGIS] #5482: Proj documentation says new functions not available til 7.1 but we have at 7.0

[PostGIS]

#5482: Proj documentation says new functions not available til 7.1 but we have at
7.0
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 Reporter:  robe     |      Owner:  pramsey
     Type:  defect   |     Status:  new
 Priority:  medium   |  Milestone:  PostGIS 3.4.1
Component:  postgis  |    Version:  3.4.x
 Keywords:           |
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 This was brought to my attention.

 I haven't checked to see if we are in trouble, and the docs are wrong or
 we need to up this requirement

 In
 https://git.osgeo.org/gitea/postgis/postgis/src/branch/master/postgis/lwgeom_transform.c#L224
 We have proj_context_get_user_writable_directory guarded with a PROJ >= 70

 but according to PROJ documentation that function was added in PROJ 7.1
 https://proj.org/en/7.1/development/reference/functions.html

 I don't think we have any bots testing PROJ 7.0, and I actually don't know
 anyone running PROJ 7.0 in production, so it's possible it is broken for
 7.0.

 I'm going to whip up a 7.0 to confirm it's broken for 7.0
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5482>
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