problem compiling apache20 port

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/usr/ports/www/apache20/work/httpd-2.0.59/srclib/apr/libtool --silent
--mode=compile cc    -O2 -fno-strict-aliasing -pipe  -D_REENTRANT
-D_THREAD_SAFE -DAP_HAVE_DESIGNATED_INITIALIZER
-I/usr/ports/www/apache20/work/httpd-2.0.59/srclib/apr/include
-I/usr/ports/www/apache20/work/httpd-2.0.59/srclib/apr-util/include
-I/usr/local/include -I.
-I/usr/ports/www/apache20/work/httpd-2.0.59/os/unix
-I/usr/ports/www/apache20/work/httpd-2.0.59/server/mpm/prefork
-I/usr/ports/www/apache20/work/httpd-2.0.59/modules/http
-I/usr/ports/www/apache20/work/httpd-2.0.59/modules/filters
-I/usr/ports/www/apache20/work/httpd-2.0.59/modules/proxy
-I/usr/ports/www/apache20/work/httpd-2.0.59/include
-I/usr/ports/www/apache20/work/httpd-2.0.59/modules/generators
-I/usr/include/openssl
-I/usr/ports/www/apache20/work/httpd-2.0.59/modules/dav/main
-prefer-non-pic -static -c exports.c && touch exports.lo
exports.c:115: error: `ap_set_receive_buffer_size' undeclared here
(not in a function)
exports.c:451: error: `ap_get_server_revision' undeclared here (not in
a function)
*** Error code 1

Stop in /usr/ports/www/apache20/work/httpd-2.0.59/server.
*** Error code 1

Stop in /usr/ports/www/apache20/work/httpd-2.0.59/server.
*** Error code 1

Stop in /usr/ports/www/apache20/work/httpd-2.0.59.
*** Error code 1

Stop in /usr/ports/www/apache20

that's what happens when i try to do a simple make:
 make WITH_AUTH_MODULES=yes WITH_SSL_MODULES=yes WITH_DAV_MODULES=yes

i've also tried with no params ...

the installed version is old and has a bug :( but i cant get a newer one there !

if anyone has any hint, please :)

matheus
-- 
We will call you cygnus,
The God of balance you shall be