0.91RC2: sql.h not found under cygwin

Hello,

I'm building 0.91RC2 under cygwin with the following configuration:

$ ./configure --with-unixodbc=/usr/local/lib --with-tdsver=8.0

Unfortunately, configure fails with

$ checking compile-time options
$ configure: error: sql.h not found

Do I need to set any flags (e.g. CPPFLAGS) for configure to find  
sql.h, since it's in a standard file location? If so, are there any  
configuration files I should remove before running again?

Thanks,
Dave
--
Dave Dumaresq
Technical Analyst - BCcampus
200 - 555 Seymour St, Vancouver BC
Phone: 604-412-7738