The attached list of Makefile.am files set AM_MAKEFLAGS. This was need to work around a bug in GNU Make that was fixed in version 3.79. Since the GCC install instructions say that GNU make 3.79.1 or later is required to build GCC these workarounds are no longer needed and should be removed. See PR 18895 for more information.
The Makefiles in question are: boehm-gc/Makefile.am fastjar/Makefile.am libffi/Makefile.am libjava/Makefile.am libmudflap/Makefile.am libstdc++-v3/Makefile.am zlib/Makefile.am -- Summary: library makefiles should not set AM_MAKEFLAGS Product: gcc Version: 4.0.0 Status: UNCONFIRMED Severity: minor Priority: P2 Component: other AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: sje at cup dot hp dot com CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18907