Here is the error:
#########################################################
bash-2.05# ./apachectl start
/usr/libexec/ld.so: Undefined symbol "_unixdriver" in httpd:/usr/local/http-2.0.35/modules/libphp4.so
./apachectl start: httpd could not be started
bash-2.05#

As the libc-client.a is installed into /usr/local/lib (I compile my own version, not using openbsd package)
I have set up variable:
/usr/local/lib:/usr/local/freetype-2.1.0/lib

Compile as install work fine.

Here is the start of config.log: 
#########################################################
It was created by configure, which was
generated by GNU Autoconf 2.52.  Invocation command line was

  $ ./configure --prefix=/usr/local/php-4.2.0 --with-gd=/usr/local --with-pgsql --with-ttf --enable-pea
r --enable-static --disable-shared --with-zlib=/usr --with-ftp --with-openssl --enable-sockets --with-a
pxs2=/usr/local/http-2.0.35/bin/apxs --with-gettext --with-jpeg-dir=/usr/local --with-png-dir=/usr/loca
l --with-freetype-dir=/usr/local/freetype-2.1.0 --with-t1lib=/usr/local/ --enable-sysvshem --enable-sys
vshm --enable-mbstring --with-imap-ssl=/usr --with-mcrypt=/usr/local --without-pam --without-crypt --wi
th-imap=/usr/local --with-imap-ssl=/usr

## ---------- ##
## Platform.  ##
## ---------- ##

hostname = vm-openbsd
uname -m = i386
uname -r = 3.0
uname -s = OpenBSD
uname -v = GENERIC#94

/usr/bin/uname -p = Intel Pentium 4 ("GenuineIntel" 686-class)
/bin/uname -X     = unknown

/bin/arch              = unknown
/usr/bin/arch -k       = OpenBSD.i386
/usr/convex/getsysinfo = unknown
hostinfo               = unknown
/bin/machine           = unknown
/usr/bin/oslevel       = unknown
/bin/universe          = unknown

PATH = /bin:/usr/bin:/usr/local/bin:/usr/sbin