Building Postfix with MySQL support

Note: to use mysql with Debian GNU/Linux's Postfix, all you need is to install the postfix-mysql package and you're done. There is no need to recompile Postfix.

The Postfix MySQL client utilizes the mysql client library, which can be obtained from:

https://www.mysql.com/downloads/
https://sourceforge.net/projects/mysql/

In order to build Postfix with mysql map support, you will need to add -DHAS_MYSQL and -I for the directory containing the mysql headers, and the mysqlclient library (and libm) to AUXLIBS, for example:

make -f Makefile.init makefiles \
    'CCARGS=-DHAS_MYSQL -I/usr/local/mysql/include' \
    'AUXLIBS=-L/usr/local/mysql/lib -lmysqlclient -lz -lm'

On Solaris, use this instead:

make -f Makefile.init makefiles \
    'CCARGS=-DHAS_MYSQL -I/usr/local/mysql/include' \
    'AUXLIBS=-L/usr/local/mysql/lib -R/usr/local/mysql/lib \
        -lmysqlclient -lz -lm'

Then, just run 'make'. This requires libz, the compression library. Older mysql implementations build without libz.