Why do I get "SQLSetConnectOption err=-2" errors in my Perl scripts

When running a Perl script using DBD::ODBC linked with the unixODBC Driver Manager, if you get:

DBI->connect(test) failed: (Unable to fetch information about the error)
(DBD: dbd_db_login/SQLSetConnectOption err=-2) at perl_e1.pl line 9

the cause may be the combination of lazy linking and RTLD_GROUP.

• If you're using Perl directly from the shell:

  Did make test succeed when building DBD::ODBC? make test sets PERL_DL_NONLAZY to 1. If lazy linking is the problem, it won't be uncovered by make test.

  Try running your Perl script again with the environment variable PERL_DL_NONLAZY set to 1.

  If this solves the problem, you probably have a unixODBC Driver Manager that sets the RTLD_GROUP flag to dlopen.

  If you're using the unixODBC Driver Manager distributed with the Easysoft ODBC-ODBC Bridge, please let us know the name of your ODBC-ODBC Bridge distribution file. If you're using unixODBC 2.2.6 or later, you can rebuild unixODBC with the configure option --enable-rtldgroup=no. If you are using unixODBC 2.2.5 or earlier, you need to stop unixODBC using the RTLD_GROUP flag in libltdl/ltdl.c.

  Edit libltdl/ltdl.c in the unixODBC source tree, search for a dlopen call using RTLD_GLOBAL (which is ORed with LT_LAZY_OR_NOW). Delete LT_GLOBAL |;. For example:

  lt_module module = dlopen (filename, LT_GLOBAL | LT_LAZY_OR_NOW);

  becomes:

  lt_module module = dlopen (filename, LT_LAZY_OR_NOW);

• If you're using Perl as an Apache CGI program without mod_perl

  Try adding:

  SetEnv PERL_DL_NONLAZY 1

  to the httpd.conf file and restart Apache. Then follow instructions in the previous bullet point.

• If you're using mod_perl under Apache:

  Set the environment variable PERL_DL_NONLAZY to 1, export it, and then restart Apache.

  If this solves the problem, you need to set and export PERL_DL_NONLAZY in your apachectl startup program.

  If this doesn't solve the problem and you're using a unixODBC Driver Manager newer than 2.2.6, rebuild unixODBC with the configure option --enable-rtldgroup=no.

Easysoft build the unixODBC Driver Manager with the following configure options:

./configure --prefix=/usr/local/easysoft/unixODBC
--sysconfdir=/etc
--enable-threads=no (or yes when building a thread-safe version)
--enable-iconv=no
--enable-drivers=no
--enable-gui=yes (or no if you don't have X and QT)

To dlopen unixODBC in an application, --enable-rtldgroup=yes needs to be added to the unixODBC 2.2.6, 2.2.7, 2.2.8+ configure line.

We also use --enable-readline=no on some platforms, because many newer machines don't have the libreadline version that's present on our build machines (which are older, for backwards compatibility reasons).