[postgis-tickets] [PostGIS] #4408: can't compile --with-wagyu under mingw64

[PostGIS]

#4408: can't compile --with-wagyu under mingw64
----------------------+---------------------------
  Reporter:  robe     |      Owner:  Algunenano
      Type:  defect   |     Status:  new
  Priority:  blocker  |  Milestone:  PostGIS 3.0.0
 Component:  postgis  |    Version:  trunk
Resolution:           |   Keywords:
----------------------+---------------------------

Comment (by Algunenano):

 I think that the issue comes from the linker being gcc and not g++.

 In my Linux machine this wasn't an issue (modern GCC/Clang), for OSX I
 added a small detection utility so now it adds `-lstdc++` or `-lc++`, but
 it looks like this isn't enough it the mingw setup.

 Can you try running the last command changing gcc for g++:
 {{{
 g++ -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-
 statement -Werror=vla -Wendif-labels -Wmissing-format-attribute -Wformat-
 security -fno-strict-aliasing -fwrapv -fexcess-precision=standard -Wno-
 format-truncation -Wno-stringop-truncation -g -O2   -shared -static-libgcc
 -o postgis-3.dll  postgis_module.o lwgeom_accum.o lwgeom_spheroid.o
 lwgeom_ogc.o lwgeom_functions_analytic.o lwgeom_inout.o
 lwgeom_functions_basic.o lwgeom_btree.o lwgeom_box.o lwgeom_box3d.o
 lwgeom_geos.o lwgeom_sfcgal.o lwgeom_geos_prepared.o lwgeom_geos_clean.o
 lwgeom_geos_relatematch.o lwgeom_export.o lwgeom_in_gml.o lwgeom_in_kml.o
 lwgeom_in_geohash.o lwgeom_in_geojson.o lwgeom_in_encoded_polyline.o
 lwgeom_triggers.o lwgeom_dump.o lwgeom_dumppoints.o lwgeom_functions_lrs.o
 lwgeom_functions_temporal.o lwgeom_rectree.o long_xact.o lwgeom_sqlmm.o
 lwgeom_rtree.o lwgeom_transform.o lwgeom_window.o gserialized_typmod.o
 gserialized_gist_2d.o gserialized_gist_nd.o gserialized_supportfn.o
 gserialized_spgist_2d.o gserialized_spgist_3d.o gserialized_spgist_nd.o
 brin_2d.o brin_nd.o brin_common.o gserialized_estimate.o geography_inout.o
 geography_btree.o geography_centroid.o geography_measurement.o
 geography_measurement_trees.o geometry_inout.o postgis_libprotobuf.o
 vector_tile.pb-c.o geobuf.pb-c.o mvt.o lwgeom_out_mvt.o geobuf.o
 lwgeom_out_geobuf.o lwgeom_out_geojson.o postgis_legacy.o
 -LC:/MING64~1/projects/POSTGR~1/rel/PG12W6~2/lib  -L/projects/zlib/rel-
 zlib-1.2.11w64gcc81/lib -L/projects/libxml/rel-libxml2-2.7.8w64gcc81/lib
 -Wl,--allow-multiple-definition -Wl,--disable-auto-import
 -L/projects/libxml/rel-libxml2-2.7.8w64gcc81/lib  -Wl,--as-needed
 ../deps/wagyu/libwagyu.la -lstdc++ ../libpgcommon/libpgcommon.a
 ../liblwgeom/.libs/liblwgeom.a
 -LC:/ming64gcc81/projects/geos/rel-3.8w64gcc81/lib -lgeos_c
 -L/projects/proj/rel-6.0.0w64gcc81/lib -lproj
 -L/projects/protobuf/rel-3.2.0w64gcc81/lib -lprotobuf-c -L/projects/libxml
 /rel-libxml2-2.7.8w64gcc81/lib -lxml2 -lws2_32 -L/projects/CGAL/rel-
 sfcgal-1.3.2w64gcc81/lib -lSFCGAL -Wl,--exclude-libs,ALL  -L/projects/CGAL
 /rel-sfcgal-1.3.2w64gcc81/lib -lSFCGAL
 -LC:/MING64~1/projects/POSTGR~1/rel/PG12W6~2/lib -lpostgres -lpgcommon
 -lpgport -lxml2 -lz -lws2_32 -lm  -lws2_32 -Wl,--export-all-symbols -Wl
 ,--out-implib=libpostgis-3.a
 }}}

 If that works I can confirm that the aim is correct and I'll investigate
 further to see what extra flags we'd need to add to link the C++ code
 correctly.

-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/4408#comment:8>
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