[postgis-tickets] [PostGIS] #5099: Running make twice compiles again under postgis

[PostGIS]

#5099: Running make twice compiles again under postgis
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  Reporter:  strk                   |      Owner:  strk
      Type:  defect                 |     Status:  new
  Priority:  medium                 |  Milestone:  PostGIS 3.3.0
 Component:  build/upgrade/install  |    Version:  master
Resolution:                         |   Keywords:
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Comment (by strk):

 The *first* run of `make` already builds both `vector_tile.pb-c.o` and
 `geobuf.pb-c.o`.
 The second run reports (`make --dry-run --trace geobuf-pb-c.o`) that
 geobuf-pb.c.o is being rebuilt due to `geobuf-pb-c.c` being newer.

 For some reason, the first make invocation is running protoc-c for
 producing those two .c files twice:
 {{{
 $ grep -n protoc-c make.log
 325:/usr/bin/protoc-c -I../../postgis --c_out=.
 ../../postgis/vector_tile.proto
 327:/usr/bin/protoc-c -I../../postgis --c_out=. ../../postgis/geobuf.proto
 329:/usr/bin/protoc-c -I../../postgis --c_out=.
 ../../postgis/vector_tile.proto
 332:/usr/bin/protoc-c -I../../postgis --c_out=. ../../postgis/geobuf.proto
 }}}

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5099#comment:2>
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