Description of problem: Having installed gtkglextmm-devel, running aclocal on any arbitrary autoconf configuration triggers this warning: /usr/share/aclocal/gtkglextmm-1.2.m4:225: warning: underquoted definition of AC_GTKGLEXTMM_SUPPORTS_MULTIHEAD run info '(automake)Extending aclocal' or see http://sources.redhat.com/automake/automake.html#Extending-aclocal Version-Release number of selected component (if applicable): gtkglextmm-devel-1.2.0-2 Additional info: The cause is an m4 quoting bug in /usr/share/aclocal/gtkglextmm-1.2.m4 As your sponsor, as a special exception, in this case, I am going to check-in a corresponding fix into CVS and trigger rebuilds.