Hi,
I have a system with 6.5.8-10 already installed. I'm building a new package of 6.6.0-8. The problem is: if I leave the old version installed while building, the build fails. After removing the old version, the new version builds fine.
I'm building on Solaris 10 x86. The full build log is here: http://toolserver.org/~rriver/TSimagemagick.log
Note that I'm building a package, so I install to a staging area with DESTDIR rather than directly to the final prefix -- I suspect this might be related. (I've found libtool has issues with this on other systems, like HP-UX, but usually it works okay on Solaris.)