The port contains fixes for two issues I encountered that are unrelated to FreeBSD:
1) The release does not install seqan.h. I don't know if thats intended, but I would think not. This is the case for SeqAn on other OSes aswell, since seqan.h is simply not included in the CMake-magic (e.g. check the Ubuntu/Debian packages). This patch  fixes it.
2) RazerS installs its gapped_params into the binary folder on Unix (/usr/bin or /usr/local/bin), which violates the system hierarchy rules on most systems. Debian/Ubuntu patch around it.. This patch  makes it install them to /usr/[local/]share/seqan/.
Feel free to upstream any of that, if you think they are valid fixes. Best, Hannes  http://www.freshports.org/biology/seqan/ http://www.freebsd.org/cgi/cvsweb.cgi/ports/biology/seqan/files/patch-cmake-CMakeLists.txt?rev=1.1;content-type=text%2Fplain  http://www.freebsd.org/cgi/cvsweb.cgi/ports/biology/seqan/files/patch-cmake-apps-CMakeLists.txt?rev=1.1;content-type=text%2Fplain