Mail server add-on for ReadyNAS?

I tired to compile Zarafa (community editon) on the readynas duo but i get stuck.

catdoc-0.94.2 compilieable
libical-0.44 compileable
libvmime-0.7.1 breaks on

./configure --host='sparc-linux' --prefix=/c/apps/
[...]
checking for iconv... yes
checking how to link with libiconv... -liconv
checking for iconv declaration... install-shextern size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
checking if an usable version of iconv exists (required)... yes
checking if linker supports global constructors... libtool: compile: specify a tag with `--tag'
libtool: link: specify a tag with `--tag'
/backup/zarafa/libvmime-0.9.2/.libs/lt-mytest: /lib/libgcc_s.so.1: version `GCC_4.2.0' not found (required by /usr/lib/libstdc++.so.6)
no
configure: error:
===================================================================
ERROR: This platform lacks support of construction of global
objects in shared libraries.

See ftp://rtfm.mit.edu/pub/usenet/news.answers/g++-FAQ/plain
for details about this problem.  Also for possible solutions
http://www.informatik.uni-frankfurt.de/~fp/Tcl/tcl-c++/tcl-c++.html
===================================================================
fes-a120d19nas:/backup/zarafa/libvmime-0.9.2# gcc --version
gcc (GCC) 4.3.6
Copyright (C) 2008 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

http://forums.zarafa.com/viewtopic.php?f=9&t=8140

zarafa-7.0.3 dependency exists

Maybe someone else trie?

http://www.zarafa.com/wiki/index.php/Co ... pendencies
Zarafa exists on other NAS solutions
http://www.zarafa.com/news/8-march-2012 ... logy%C2%AE