Now that I can build libgcj again on HEAD, I found that it pollutes the common namespace by installing $PREFIX/lib/logging.properties.
This break the installation of several versions of GCC into the same $PREFIX using --program-suffix=. -- Summary: [4.2 regression] lib/logging.properties pollutes common namespace Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libgcj AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: gerald at pfeifer dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27890