When I do the following on Scientific Linux:
git clone http://github.com/DynareTeam/dynare.git
cd dynare
git submodule update --init
autoreconf -si
I get the warning
configure.ac:58: warning: macro `AM_PROG_AR' not found in library
and then the program seems to hang (I do not get any other output and I am not returned to the command prompt).