it was not. now that _you've_ mentioned it, i'll try it and see.
fyi ... this looks better, now.
setenv LDFLAGS "-L/usr/local/db46/lib -L/usr/local/sqlite/lib -L/usr/local/mysql/lib/mysql -L/usr/local/lib" setenv LIBS "-liconv" setenv SQL_LIBS "-lsqlite3" setenv CPPFLAGS "-I/usr/local/db46/include -I/usr/local/sqlite/include -I/usr/local/mysql/include/mysql -I/usr/local/include"
./configure 
--config-cache 
--prefix=/usr/local/dovecot 
--with-moduledir=/usr/local/dovecot-plugins 
--with-libiconv-prefix=/usr/local 
--with-ssl=openssl 
--with-ssldir=/var/CERTS 
--enable-maintainer-mode 
--disable-debug 
--enable-ipv6 
--disable-static --enable-shared 
--with-db 
--with-mysql 
--with-sqlite 
--with-ioloop=best 
--with-sql-drivers=mysql,sqlite 
--with-deliver 
--with-pop3d 
--with-storages=maildir,mbox,dbox,cydir,raw
otool -L sbin/dovecot sbin/dovecotpw libexec/dovecot/dovecot-auth
sbin/dovecot: /usr/local/lib/libiconv.2.dylib (compatibility version 7.0.0, current version 7.0.0) /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.0.0)
sbin/dovecotpw: /usr/lib/libpam.1.dylib (compatibility version 1.0.0, current version 1.0.0) /usr/local/mysql/lib/mysql/libmysqlclient_r.15.dylib (compatibility version 16.0.0, current version 16.0.0) /usr/local/ssl/lib/libssl.0.9.8.dylib (compatibility version 0.9.8, current version 0.9.8) /usr/local/ssl/lib/libcrypto.0.9.8.dylib (compatibility version 0.9.8, current version 0.9.8) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.0.0) /usr/local/sqlite/lib/libsqlite3.0.dylib (compatibility version 9.0.0, current version 9.6.0) /usr/local/lib/libreadline.5.2.dylib (compatibility version 5.0.0, current version 5.2.0) /usr/local/lib/libncurses.5.6.dylib (compatibility version 5.6.0, current version 5.6.0) /usr/local/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.3) /usr/local/lib/libiconv.2.dylib (compatibility version 7.0.0, current version 7.0.0) /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0)
libexec/dovecot/dovecot-auth: /usr/lib/libpam.1.dylib (compatibility version 1.0.0, current version 1.0.0) /usr/local/mysql/lib/mysql/libmysqlclient_r.15.dylib (compatibility version 16.0.0, current version 16.0.0) /usr/local/ssl/lib/libssl.0.9.8.dylib (compatibility version 0.9.8, current version 0.9.8) /usr/local/ssl/lib/libcrypto.0.9.8.dylib (compatibility version 0.9.8, current version 0.9.8) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.0.0) /usr/local/sqlite/lib/libsqlite3.0.dylib (compatibility version 9.0.0, current version 9.6.0) /usr/local/lib/libreadline.5.2.dylib (compatibility version 5.0.0, current version 5.2.0) /usr/local/lib/libncurses.5.6.dylib (compatibility version 5.6.0, current version 5.6.0) /usr/local/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.3) /usr/local/lib/libiconv.2.dylib (compatibility version 7.0.0, current version 7.0.0) /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0)
(*should* there be any links to -ldb in there?)
cheers!