Subversion : some progress

Okay, I've gotten farther, but still error out. These are the steps I've taken:

1. started with a fresh factory default ReadyNAS 1100 (RAIDiator 4.1.3-T136 [1.00a146] in X-RAID)
2. downloaded EnableRootSSH and APT from here
3. installed those .bin files via FrontView, System>Update>Local
4. logged into my ReadyNAS via SSH (putty)
5. apt-get update (see http://www.readynas.com/?p=145 for details - thanks ianadavies)
apt-get install nano
apt-get install libc6-dev
apt-get install gcc
apt-get install gdb
apt-get install libtag1-dev (this one gave me errors)

Reading Package Lists... Done
		Building Dependency Tree... Done
		Some packages could not be installed. This may mean that you have
		requested an impossible situation or if you are using the unstable
		distribution that some required packages have not yet been created
		or been moved out of Incoming.

		Since you only requested a single operation it is extremely likely that
		the package is simply not installable and a bug report against
		that package should be filed.
		The following information may help to resolve the situation:

		The following packages have unmet dependencies:
		  libtag1-dev: Depends: libtag1 (= 1.4-2bpo2.netgear1) but 1.4-2bpo2.netgear2 is to be installed
		E: Broken packages

apt-get install uuid-dev
6. wget http://subversion.tigris.org/downloads/ ... 5.1.tar.gz
7. wget http://subversion.tigris.org/downloads/ ... 5.1.tar.gz
8. tar xvzf subversion-1.5.1.tar.gz
9. tar xvzf subversion-deps-1.5.1.tar.gz
10. rm *.gz (why keep the tarballs?)
11. cd subversion-1.5.1/zlib/
12. ./configure && make test && make install (this is where I got stuck last time but ianadavies pointed me in the right direction)
13. cd ..
14. ./configure --build=sparc-linux --enable-all-static --with-ssl --without-serf --with-zlib=/usr/local

If I understand correctly, at this point my ReadyNAS started chugging along creating the proper configuration for subversion on my machine.

By the way, one of the status lines I got was

checking for entropy source... /dev/urandom

Does this mean that I don't need to worry about the /dev/random vs /dev/urandom issue mentioned in previous posts?

Eventually, however, the configuration erred out with the following (I've cut and pasted the last dozen lines of the 1000+ output lines):

configure: IPv6 support is enabled
checking for working AI_ADDRCONFIG... yes
checking for socklen_t... yes
checking for struct tm.tm_gmtoff... yes
checking for struct tm.__tm_gmtoff... no
configure: zlib not enabled
checking whether to enable ACL support in neon... yes
checking for pkg-config... no
checking for library containing RSA_new... not found
configure: error: could not find library containing RSA_new
configure failed for neon

There were a few other questionable configuration outputs but I'm not sure if they were actually errors or just standard occurrences. I can provide the entire output line dump if necessary.

Does anyone have any insights that might help with this?