http://gcc.gnu.org/install/test.html says prerequisites for running the test suite include dejagnu, tcl, and inspect. Autogen should also be on this list.
-- Summary: prerequisite list in doc incomplete Product: gcc Version: 4.0.1 Status: UNCONFIRMED Severity: minor Priority: P3 Component: testsuite AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: phr-gcc at nightsong dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26170