If you have iODBC installed, you can configure Virtuoso data sources by adding the following entry into the relevant .odbc.ini file. Usually it is the value of the ODBCINI environment variable or $HOME/.odbc.ini.
[LocalVirt] Driver=/usr/local/lib/virtodbc_32.so # absolute path to the shared object Address=localhost:1111 # host and port of the Virtuoso server
If the application that will load the ODBC driver is multithreaded, use the virtodbc32_r.so driver instead.
The isql and other utilities are linked directly with the Virtuoso client code. See the Makefiles for the libraries used. These are identical in function with the ODBC driver but accept a host:port in the place of a data-source name to be resolved from the odbc ini file.
Generally applications should pass via ODBC. Directly linking with the ODBC driver shared object is also possible.
See Virtuoso ODBC Documentation for more.
If you specified --with-jdbc3=