mail/php4-imap/work/php-4.3.9/ext/imap/config.log a

|                    Syntax error
configure:3510: /lib/cpp -I conftest.c
eval: /lib/cpp: not found
configure:3516: $? = 127
configure: failed program was:
| /* confdefs.h.  */

work/php-4.3.9/ext/imap/configure:

for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp"

php4-imap は imap-uw だけなのかな。cyrus-imapd は ?