Advice compiling php

Hello,

I'm trying to compile php from source by using gcc 4.6.0 on the readynas duo sparc. I read the php.net manual which says I have to set the parameter --with-apxs2=

The only apxs file I found in the readynas duo was located in /c/home/admin/support/apxs.

But when viewing the content of apxs I seems that the paths are set wrong. Anyway, when using "../php-5.3.10/configure --with-apxs2=/c/home/admin/support/apxs --host=sparc-linux I'll get

Sorry, I cannot run apxs.  Possible reasons follow:

1. Perl is not installed
2. apxs was not found. Try to pass the path using --with-apxs2=/path/to/apxs
3. Apache was not built using --enable-so (the apxs usage page is displayed)

The output of /c/home/admin/support/apxs follows:
sh: line 1: /usr/local/apache2/bin/envvars: No such file or directory
apxs:Error: Sorry, no shared object support for Apache.
apxs:Error: available under your platform. Make sure.
apxs:Error: the Apache module mod_so is compiled into.
apxs:Error: your server binary `/c/home/admin/'..
configure: error: Aborting

Have I to correct all paths? Is there a newer apxs file available? Or is there an other workaround to get the php compiled with using the apache version of the readynas duo? greetings