If any of you can share any pointers on how to even get it to compile I'd appreciate it. I just need to access a esri file geodatabase that has curves and see if I can get them into postgis. If I have to have a separate build of gdal just for that I don't care. But I'm not too good with compiling gdal with 3rd party libraries.
Thanks, Rich On Fri, Mar 10, 2017 at 10:16 AM, Even Rouault <even.roua...@spatialys.com> wrote: > On vendredi 10 mars 2017 12:57:05 CET Robert Coup wrote: > > > Hi Even, > > > > > > On 9 March 2017 at 23:03, Even Rouault <even.roua...@spatialys.com> > wrote: > > > > For those, at least on Linux, and which use GDAL compiled *without* > > > > --with-static-proj, you may get strange projection related failures at > > > > runtime. This is due to libFileGDBAPI.so embedding a copy of proj.4 > > > > (without symbol hidding or renaming !!!), which conflicts with the > proj.4 > > > > that GDAL will load dlopen(). Typical error emitted is about "unknown > > > > ellipsoid". > > > > > > I presume there's no workaround apart from --with-static-proj that > doesn't > > > require ESRI to change their build process? > > > > Hi Rob, > > > > Yeah, I'm not even sure if --with-static-proj (which contrary to what its > name my suggst will link against libproj.so if found) is completely safe, > but it did work for me. > > > > Strangely, even without --with-static-proj, it worked for me at first, but > then failed when I probably reordered paths in my LD_LIBRARY_PATH. But I'm > not so surprised: clashing symbols issues tend to be not predictable. > > > > In fact, libFileGDBAPI.so doesn't seem to embed all public proj.4 symbols. > The functions are missing. But 5 or 6 global array structures, like the > list of datums (pj_datums) are exposed in the data read-only section. The > issue is that pj_datums doesn't seem to have the same structure: 2 columns > per record in the ESRI version whereas official proj.4 expects 4 columns > > > > $ objdump -T /home/even/FileGDB_API-64gcc51/lib/libFileGDBAPI.so | grep > pj_ > > 00000000010dc880 g DO .data.rel.ro 00000000000000b0 Base pj_datums > > 0000000001294080 g DO .data.rel.ro 0000000000000570 Base pj_projections > > 00000000010dbd20 g DO .data.rel.ro 0000000000000500 Base pj_pids > > 00000000010dc7a0 g DO .data.rel.ro 00000000000000e0 Base pj_primems > > 00000000010dc380 g DO .data.rel.ro 0000000000000420 Base pj_ellipses > > 00000000010dc220 g DO .data.rel.ro 0000000000000160 Base pj_linunits > > > > Even > > > > > > -- > > Spatialys - Geospatial professional services > > http://www.spatialys.com > > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/gdal-dev > -- Richard W. Greenwood, PLS www.greenwoodmap.com
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