cyrus imap 2.5.5 build in Linux: problem with pcre

[Sergey]

Hello.

I built and run version 2.5.5 but I have some questions about
build process. I will ask this in some different messages.

I wanted to build Cyrus-IMAP with libpcre but it did not success.
System libpcre-devel package install headers to /usr/include/pcre.
I tried to replace pcreposix.h in configure.ac to pcre/pcreposix.h
but it didn't yield results. "configure" found it:

checking pcre/pcreposix.h usability... yes
checking pcre/pcreposix.h presence... yes
checking for pcre/pcreposix.h... yes

but pcre missed in final configuration:

External dependencies:
   ldap:               yes
   openssl:            yes
   pcre:               no

I'm not very familiar with autotools. What can I missed ?
btw: "configure" contains "--with-bdb-incdir" option.
I think what "--with-pcre-incdir" will be good.

-- 
Regards,
Sergey