wine users - Mar 2011 - Compiling wine on 64-bit Ubuntu - ldap not detected

When trying to compile wine on 64-bit Ubuntu 10.04 I get the following message
from ./configure

configure: OpenCL 32-bit development files not found, OpenCL won't be
supported.
configure: libldap (OpenLDAP) 32-bit development files not found, LDAP won't
be supported.

I don't care too much about OpenCL, although if anyone knows what library I
need I wouldn't mind having it, but I want LDAP support, and I have
libldap2-dev installed, but configure doesn't recognize it.  What can I do
to get ldap support?

you need the package ia32-libs from the wine ppa (see
http://www.winehq.org/download/deb for how to get the ppa)

My installed version is 20090808ubuntu10~wineppa4 - is that correct?

yes,
maybe you need to install the 32-bit ldap stuff yourself from source.
also http://wiki.winehq.org/Recommended_Packages might help