bind-9.5.2 build warnings

[Kirk]

OS == Solaris 9
Compilers == Sun or GCC

Anyone know what causes these warnings?

./configure --with-openssl=no --with-libxml2=/usr/local --disable-threads

<snip to last line of configure output>
configure: WARNING: Unrecognized options: --with-openssl, --with-libxml2

or


./configure --without-openssl --with-libxml2=/usr/local --disable-threads

<snip to last line of configure output>
configure: WARNING: Unrecognized options: --without-openssl, --with-libxml2