./configure --with-openlink=/usr/local/openlink
make

php_odbc.c: In function `odbc_column_lengths':
php_odbc.c:622: `SQLINTEGER' undeclared (first use in this function)
php_odbc.c:622: (Each undeclared identifier is reported only once
php_odbc.c:622: for each function it appears in.)
php_odbc.c:622: parse error before `len'
php_odbc.c:651: `len' undeclared (first use in this function)

resolution:

change to SQLINTEGER to SQLSMALLINT in php_odbc.c

This is probably a better more compatible way of handling this fix, but that works for me.  This problem has been around since at least PHP 4.0.2, but not PHP 3.