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This diff has been restricted to the following files: 'configure.ac'

#
#
# patch "configure.ac"
#  from [ec7e74911afd17b2816ada7c0a0ad5349b95340d]
#    to [fe7b2a288ec73db3487937bd1cc2538ba7494603]
#
============================================================
--- configure.ac	ec7e74911afd17b2816ada7c0a0ad5349b95340d
+++ configure.ac	fe7b2a288ec73db3487937bd1cc2538ba7494603
@@ -3,7 +3,12 @@ AC_PROG_CAMLP4
 AC_PROG_OCAML
 AC_PROG_OCAML_TOOLS
 AC_PROG_CAMLP4
+if test -z "$CAMLP4O" ; then
+  AC_MSG_ERROR([

+Could not find camlp4o. Camlp4 is required to build monotone-viz.])
+fi
+
 # Check LablGTK
 AC_ARG_WITH([lablgtk-dir],
 	    AS_HELP_STRING([--with-lablgtk-dir],