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/usr/share/dune/aclocal/dune-localfunctions.m4 is in libdune-localfunctions-dev 2.2.1-2.

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AC_DEFUN([DUNE_LOCALFUNCTIONS_CHECKS],[
  AM_CONDITIONAL([ALUGRID], [test x$HAVE_ALUGRID = x1])
])

AC_DEFUN([DUNE_LOCALFUNCTIONS_CHECK_MODULE],[
  AC_MSG_NOTICE([Searching for dune-localfunctions...])
  DUNE_CHECK_MODULES([dune-localfunctions], [localfunctions/common/localbasis.hh])
])