GCC 4.3.4 was successfully built, checked and installed on i386-unknown-freebsd7.2. Note: Default configure options were used except GNU binutils 2.16.1 rather than system's binutils 2.15 and the testsuite was run with -pthread.
http://gcc.gnu.org/ml/gcc-testresults/2009-08/msg01193.html (Please note that the reported LAST_UPDATED line is incorrect since I manually ran "svn switch ...tags/gcc_4_3_4_release" followed by "./contrib/gcc_update --touch".) Finally, AFAIK, all required tools were provided by the system or recent versions installed from the ports. Regards, Loren