[postgis-tickets] [PostGIS] #3603: use pkg-config more

[PostGIS]

#3603: use pkg-config more
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 Reporter:  gdt                    |      Owner:  strk
     Type:  enhancement            |     Status:  new
 Priority:  medium                 |  Milestone:  PostGIS 2.3.0
Component:  build/upgrade/install  |    Version:  trunk
 Keywords:                         |
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 configure looks for json-c in a directory specified on the command line,
 which is gratuitously hard because json-c supports pkg-config.  Ideally,
 packages known to use pkg-config should be found that way; both proj and
 json-c have pkg-config entries, and probably all non-ancient versions of
 them do.   This would also really simply configure.ac.

 I am unclear on milestone; seems likely not for 2.3 given imminent release
 notion, but would be on the list for afterwards.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3603>
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