[MacPorts] #56429: mapnik @3.0.19_1+gdal+libxml2+postgis+sqlite: Missing proj4 supports

[MacPorts]

#56429: mapnik @3.0.19_1+gdal+libxml2+postgis+sqlite: Missing proj4 supports
-------------------------+--------------------
 Reporter:  dmarteau     |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.4.3
 Keywords:               |       Port:  mapnik
-------------------------+--------------------
 Trying to run mapnik-python against macport installed mapnik library leads
 to the following error

 {{{
 RuntimeError: Cannot initialize proj_transform for given projections
 without proj4 support
 (-DMAPNIK_USE_PROJ4): '+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0
 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0
 +units=m +nadgrids=@null +no_defs'->'+proj=lcc +ellps=GRS80 +lat_0=49
 +lon_0=-95 +lat+1=49 +lat_2=77
 +datum=NAD83 +units=m +no_defs'
 }}}

 mapnik-config --cflags --cxxflags return the following

 {{{
 -I/opt/local/include -I/opt/local/include/mapnik/agg
 -I/opt/local/include/mapnik -I/opt/local/include
 -I/opt/local/include/freetype2 -I/opt/local/include/libxml2
 -I/opt/local/include/postgresql10
 -DMAPNIK_MEMORY_MAPPED_FILE -DMAPNIK_HAS_DLCFN -DBIGINT
 -DBOOST_REGEX_HAS_ICU -DHAVE_JPEG -DHAVE_PNG
 -DHAVE_WEBP -DHAVE_TIFF -DDARWIN -DMAPNIK_THREADSAFE
 -DBOOST_SPIRIT_NO_PREDEFINED_TERMINALS=1
 -DBOOST_PHOENIX_NO_PREDEFINED_TERMINALS=1 -DBOOST_SPIRIT_USE_PHOENIX_V3=1
 -DNDEBUG -DGRID_RENDERER
 -DHAVE_LIBXML2 -std=c++11 -stdlib=libc++ -Os -stdlib=libc++
 -fvisibility=hidden
 -fvisibility-inlines-hidden -Wall -ftemplate-depth-300 -Wsign-compare
 -Wshadow -O3
 -std=c++11 -stdlib=libc++ -Os -stdlib=libc++ -fvisibility=hidden
 -fvisibility-inlines-hidden -Wall
  -ftemplate-depth-300 -Wsign-compare -Wshadow -O3
 }}}

 In appears that mapnik is not compiled wint proj4 supports and there is no
 variants for enabling this.

 Please could you add MAPNIK_USE_PROJ4 supports as variant ?

 Thanks.

-- 
Ticket URL: <https://trac.macports.org/ticket/56429>
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