macOS needs to include spatialindex before geos.

If both are on separate paths and geos is first, case-insensitive macOS will include (geos) spatialIndex.h instead of SpatialIndex.h

src/analysis/CMakeLists.txt

@@ -246,11 +246,11 @@ INCLUDE_DIRECTORIES(
   network
 )
 INCLUDE_DIRECTORIES(SYSTEM
+  ${SPATIALINDEX_INCLUDE_DIR} # before GEOS for case-insensitive filesystems
   ${PROJ_INCLUDE_DIR}
   ${GEOS_INCLUDE_DIR}
   ${GDAL_INCLUDE_DIR}
   ${SQLITE3_INCLUDE_DIR}
-  ${SPATIALINDEX_INCLUDE_DIR}
 )
 
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