Apache 2.0 doesn't build on Mac OS X 10.3 (Panther)

I've been attempting to build Apache 2.0.48 on MacOS X
version 10.3 (Panther), on a G4 (iBook). This built
fine on 10.2, but since the upgrade to Panther, I'm
running into build problems in the poll/unix directory.
I suspect it has something to do with autoconf (??), but
before I research this further, hoping someone will have
run into this and has the magic solution.

Any help is greatly appreciated.

-Mick

Email: mick.DeleteThis@ocolabs.com

Making all in poll/unix
/bin/sh /Users/keno/Desktop/httpd-2.0.48/srclib/apr/libtool --silent
--mode=compile gcc -g -O2 -DHAVE_CONFIG_H -DDARWIN
-DSIGPROCMASK_SETS_THREAD_MASK -no-cpp-precomp
-I../../include -I../../include/arch/unix -I../../include/arch/unix
-c poll.c && touch poll.lo
poll.c: In function `apr_poll':
poll.c:126: storage size of `pollset' isn't known
poll.c: In function `apr_pollset_create':
poll.c:353: sizeof applied to an incomplete type
poll.c: In function `apr_pollset_add':
poll.c:392: invalid use of undefined type `struct pollfd'
poll.c:392: dereferencing pointer to incomplete type
poll.c:395: invalid use of undefined type `struct pollfd'
poll.c:395: dereferencing pointer to incomplete type
poll.c:398: invalid use of undefined type `struct pollfd'
poll.c:398: dereferencing pointer to incomplete type
poll.c: In function `apr_pollset_remove':
poll.c:468: invalid use of undefined type `struct pollfd'
poll.c:468: dereferencing pointer to incomplete type
poll.c:468: invalid use of undefined type `struct pollfd'
poll.c:468: dereferencing pointer to incomplete type
poll.c: In function `apr_pollset_poll':
poll.c:540: invalid use of undefined type `struct pollfd'
poll.c:540: dereferencing pointer to incomplete type
poll.c:543: invalid use of undefined type `struct pollfd'
poll.c:543: dereferencing pointer to incomplete type
make[4]: *** [poll.lo] Error 1
make[3]: *** [all-recursive] Error 1
make[2]: *** [all-recursive] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all-recursive] Error 1