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E.2 Debugging a MySQL Client
============================
To be able to debug a MySQL client with the integrated debug package,
you should configure MySQL with -with-debug or -with-debug=full. See
configure-options.
Before running a client, you should set the `MYSQL_DEBUG' environment
variable:
shell> MYSQL_DEBUG=d:t:O,/tmp/client.trace
shell> export MYSQL_DEBUG
This causes clients to generate a trace file in `/tmp/client.trace'.
If you have problems with your own client code, you should attempt to
connect to the server and run your query using a client that is known
to work. Do this by running `mysql' in debugging mode (assuming that
you have compiled MySQL with debugging on):
shell> mysql --debug=d:t:O,/tmp/client.trace
This provides useful information in case you mail a bug report. See
bug-reports.
If your client crashes at some 'legal' looking code, you should check
that your `mysql.h' include file matches your MySQL library file. A
very common mistake is to use an old `mysql.h' file from an old MySQL
installation with new MySQL library.
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