+HAS_MAGIC=yes
+AC_CHECK_LIB(magic, magic_open, [:], [HAS_MAGIC=no])
+AC_CHECK_HEADER(magic.h, [], [HAS_MAGIC=no])
+if test "$HAS_MAGIC" = no; then
+ AC_MSG_ERROR([*** cannot find libmagic on this system])
+fi
+
+AH_TEMPLATE(HAVE_VALGRIND, [define to include debugging support for Valgrind])
+AC_CHECK_HEADER(valgrind/memcheck.h, [AC_DEFINE(HAVE_VALGRIND)], [])
+