Some more data points. I also created a new database and tried:

pgis21=# create extension postgis;
ERROR: could not load library "/usr/lib/postgresql/9.2/lib/postgis-2.1.so": /usr/lib/postgresql/9.2/lib/postgis-2.1.so: undefined symbol: json_tokener_errors
pgis21=# create extension postgis version '2.0.3';
ERROR: could not load library "/usr/lib/postgresql/9.2/lib/rtpostgis-2.0.so": libgdal1.6.0.so.1: cannot open shared object file: No such file or directory

So I rebuilt postgis 2.0.3 to use the new gdal that I installed for 2.1 and tried "create extension postgis;" and this installed 2.0.3 by default.

pgis21=# drop extension postgis ;
DROP EXTENSION

pgis21=# create extension postgis version '2.1.0beta3dev';
CREATE EXTENSION

and now it loaded 2.1 ok.

Not sure what caused the strangeness, but it seems to be working there, but when I run my pgrouting test script:

woodbri@maps:~/work/pgrouting$ tools/test-runner.pl
RUNNING: test-runner.pl
ERROR: could not load library "/usr/lib/postgresql/9.2/lib/postgis-2.0.so": /usr/lib/postgresql/9.2/lib/postgis-2.0.so: undefined symbol: json_tokener_errors
ERROR:  required extension "postgis" is not installed

This creates a new database, adds postgis and pgrouting and then runs tests in that database.

-Steve

On 5/23/2013 1:01 AM, Stephen Woodbridge wrote:
Hi all,

I just tried to upgrade postgis from 2.0.3 -> 2.1.0beta3dev and got the
following error:

pgr_test=# alter extension postgis update to '2.1.0beta3dev';
ERROR:  could not load library
"/usr/lib/postgresql/9.2/lib/postgis-2.1.so":
/usr/lib/postgresql/9.2/lib/postgis-2.1.so: undefined symbol:
json_tokener_errors

Did I forget a step or do something wrong?

-Steve

I have json-c-0.11 built and installed. In fact is is the ./configure
report:

   PostGIS is now configured for i686-pc-linux-gnu

  -------------- Compiler Info -------------
   C compiler:           gcc -g -O2
   C++ compiler:         g++ -g -O2
   SQL preprocessor:     /usr/bin/cpp -traditional-cpp -P

  -------------- Dependencies --------------
   GEOS config:          /usr/local/bin/geos-config
   GEOS version:         3.3.8
   GDAL config:          /usr/local/bin/gdal-config
   GDAL version:         1.9.2
   PostgreSQL config:    /usr/lib/postgresql/9.2/bin/pg_config
   PostgreSQL version:   PostgreSQL 9.2.4
   PROJ4 version:        47
   Libxml2 config:       /usr/bin/xml2-config
   Libxml2 version:      2.7.8
   JSON-C support:       yes
   PostGIS debug level:  0
   Perl:                 /usr/bin/perl

  --------------- Extensions ---------------
   PostGIS Raster:       enabled
   PostGIS Topology:     enabled
   SFCGAL support:       disabled

  -------- Documentation Generation --------
   xsltproc:             /usr/bin/xsltproc
   xsl style sheets:
   dblatex:
   convert:
   mathml2.dtd:          http://www.w3.org/Math/DTD/mathml2/mathml2.dtd


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