BSDI 4.x has some thread-related bugs. If you want to use MySQL on this, you should install all thread-related patches. At least M400-023 should be installed.
On some BSDI 4.x systems, you may get problems with shared
libraries. The symptom is that you can't execute any client
programs, for example, mysqladmin. In this
case, you need to reconfigure not to use shared libraries with
--disable-shared option to configure.
Some customers have had problems on BSDI 4.0.1 that the mysqld binary after a while can't open tables. This occurs because some library/system-related bug causes mysqld to change current directory without having asked for that to happen.
The fix is to either upgrade MySQL to at least version 3.23.34
or, after running configure, remove the
#define HAVE_REALPATH from
config.h before running
Note that this means that you can't symbolically link a database directories to another database directory or symbolic link a table to another database on BSDI. (Making a symbolic link to another disk is okay).