/usr/share/aclocal/pkg.m4:5: warning: underquoted definition of PKG_CHECK_MODULES run info '(automake)Extending aclocal' or see http://sources.redhat.com/automake/automake.html#Extending%20aclocal Could this be fixed and pushed upstream, please? It's just a simple matter of: - AC_DEFUN(PKG_CHECK_MODULES, [ + AC_DEFUN([PKG_CHECK_MODULES], [ Max.