unresolved external symbol _mysql_real_escape_string when building with PDO

I wanted to build my own 5.1.0RC1 on Windows, with support for PDO drivers for mysql and odbc (I know I could download prebuilt binaries but in principle I want my own debug build). Can anyone please tell me what configure options I need to get the PDO drivers to build, because I am not getting them right? Attempt 1 With a freshly downloaded 5.1.0RC1 and a configure that looks like: cscript configure.js --with-extra-includes=..\libiconv\include;..\libxml2\include --with-extra-libs=..\libiconv\lib;..\libxml2\win32\lib --with-pdo-mysql --with-pdo-odbc=ibm-db2 ... I get the subject error during the link step: Creating library Release_TS\php5ts.lib and object Release_TS\php5ts.exp mysql_driver.obj : error LNK2001: unresolved external symbol _mysql_real_escape_string Attempt 2 I tried adding --with-mysql to the options but that gets a compile-time error so I clearly don't know what I am doing here ext\mysql\php_mysql.c(385) : error C2065: 'CLIENT_INTERACTIVE' : undeclared identifier BTW I would be pleased to move up to PDO1.0 RC1 but I saw getting this build to work as a necessary preliminary. Matthew