sim5b installs in a way that should be familiar to most that have installed modern Gnu software. Requirements: difxio fftw To install from a .tar.gz distribution: To install from a fresh svn checkout, run the following: aclocal autoconf autoheader automake -a ./configure --prefix=${DIFX_PREFIX} make # (su root?) make install After an svn update, these steps do not need to be rerun. usually just "make" will update everything properly, but sometimes it is necessary to run "autoreconf" before compiling again. If that doesn't work, one can always fall back on the above sequence of commands.