This should be fixed in branches/1.1 and trunk. Can you checkout one of these, 
and confirm?

I use Gentoo and never learned to compile software myself or even checkout from 
a git(?) repository.  But I'll test it if you can give me the commands.  I'd 
like to avoid installing all of the files throughout my system and just copy 
the key binary/binaries over myself.

No probs.

1. To checkout branches/1.1
     svn checkout http://cantata.googlecode.com/svn/branches/1.1 cantata-1.1

2. mkdir cantata-1.1-build

3. cd cantata-1.1-build

4. cmake ../cantata-1.1  -DENABLE_TAGLIB=OFF

5. make

If the above completes successfully, then this bug is fixed. There is no need 
to install, as you a just checking if the build succeeds.

After you have finished you can just remove cantata-1.1 and cantata-1.1-build

Build still fails for r3336:
/var/tmp/portage/media-sound/cantata-9999/work/cantata-9999/mpd/mpdparseutils.cp
p: In function ‘Song MPDParseUtils::parseSong(const QByteArray&, bool)’:
/var/tmp/portage/media-sound/cantata-9999/work/cantata-9999/mpd/mpdparseutils.cp
p:256:22: error: ‘OnlineService’ has not been declared
make[2]: *** [CMakeFiles/cantata.dir/mpd/mpdparseutils.o] Error 1

For testing latest cantata svn in Gentoo you can use live (9999) ebuild from 
multimedia overlay: http://gpo.zugaina.org/media-sound/cantata

Ah, your issue was with trunk. Anyhow, I've checked both branches/1.1 and trunk 
- and both now compile with taglib disabled.

trunk builds fine now, thanks. What patch i should use for fixing 
https://bugs.gentoo.org/show_bug.cgi?id=484126

Or may be you will release 1.1.3?