AC_DEFUN(subdir[_INIT], [
  AC_REQUIRE([AC_HEADER_STDC])

  if test -z "$2"; then
    MMGR_PREFIX="${PACKAGE_NAME}";
  else
    MMGR_PREFIX="$2";
  fi
  AC_SUBST([MMGR_PREFIX])

  MMGR_DIR="$1";
  AC_SUBST([MMGR_DIR])

  AC_CONFIG_FILES([$1/${MMGR_PREFIX}_mmgr.h:$1/mmgr.h.in])
  AC_CONFIG_FILES([$1/${MMGR_PREFIX}_mmgr.c:$1/mmgr.c.in])
])