[postgis-tickets] [PostGIS] #4258: Untangle SFCGAL into its own .so

[PostGIS]

#4258: Untangle SFCGAL into its own .so
-------------------------+---------------------------
 Reporter:  komzpa       |      Owner:  pramsey
     Type:  enhancement  |     Status:  new
 Priority:  medium       |  Milestone:  PostGIS 3.0.0
Component:  postgis      |    Version:  trunk
 Keywords:               |
-------------------------+---------------------------
 Per https://lists.osgeo.org/pipermail/postgis-
 devel/2018-November/027509.html

 {{{
 1. we remove branching on postgis/sfcgal for same functions. They always
 go to postgis.
 2. if SFCGAL func version adds some value or behavior change, we untangle
 them by names (not just adding _SFCGAL, but semantic difference) and put
 sfcgal version into postgis_sfcgal extension.
 3. functions like ST_StraightSkeleton skeleton straight to
 postgis_sfcgal.so.
 4. postgis.so has no linkage to sfcgal.
 5. postgis_sfcgal.so may have linkage to whatever it needs.
 6. if there is a difference in implementation (postgis knows no TIN,
 sfcgal knows no curve) that goes to each of untangled function's manual
 entry.
 }}}

-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/4258>
PostGIS <http://trac.osgeo.org/postgis/>
The PostGIS Trac is used for bug, enhancement & task tracking, a user and developer wiki, and a view into the subversion code repository of PostGIS project.