&reftitle.install;

`--with-adabas[=DIR]`

- Include Adabas D support. DIR is the Adabas base install directory, defaults to `/usr/local`.

`--with-sapdb[=DIR]`

- Include SAP DB support. DIR is SAP DB base install directory, defaults to `/usr/local`.

`--with-solid[=DIR]`

- Include Solid support. DIR is the Solid base install directory, defaults to `/usr/local/solid`.

`--with-ibm-db2[=DIR]`

- Include IBM DB2 support. DIR is the DB2 base install directory, defaults to `/home/db2inst1/sqllib`.

`--with-empress[=DIR]`

- Include Empress support. DIR is the Empress base install directory, defaults to `$EMPRESSPATH`. This option only supports Empress Version 8.60 and above.

`--with-empress-bcs[=DIR]`

- Include `"Empress Local Access"` support. DIR is the Empress base install directory, defaults to `$EMPRESSPATH`. This option only supports Empress Version 8.60 and above.

`--with-birdstep[=DIR]`

- Include Birdstep support. DIR is the Birdstep base install directory, defaults to `/usr/local/birdstep`.

`--with-custom-odbc[=DIR]`

- Include a user defined ODBC support. The DIR is ODBC install base directory, which defaults to `/usr/local`. Make sure to define CUSTOM_ODBC_LIBS and have some `odbc.h` in your include dirs. E.g., you should define following for Sybase SQL Anywhere 5.5.00 on QNX, prior to run configure script: CPPFLAGS="-DODBC_QNX -DSQLANY_BUG" LDFLAGS=-lunix CUSTOM_ODBC_LIBS="-ldblib -lodbc".

`--with-iodbc[=DIR]`

- Include iODBC support. DIR is the iODBC base install directory, defaults to `/usr/local`.

`--with-esoob[=DIR]`

- Include Easysoft OOB support. DIR is the OOB base install directory, defaults to `/usr/local/easysoft/oob/client`.

`--with-unixODBC[=DIR]`

- Include unixODBC support. DIR is the unixODBC base install directory, defaults to `/usr/local`.

`--with-openlink[=DIR]`

- Include OpenLink ODBC support. DIR is the OpenLink base install directory, defaults to `/usr/local`. This is the same as iODBC.

`--with-dbmaker[=DIR]`

- Include DBMaker support. DIR is the DBMaker base install directory, defaults to where the latest version of DBMaker is installed (such as `/home/dbmaker/3.6`).

Windows users must enable `php_odbc.dll` in order to use this extension.