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diff --git a/m4/ocaml.m4 b/m4/ocaml.m4
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+dnl
+dnl Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
+dnl Copyright (C) INRIA - 2006/2008 - Sylvestre Ledru
+dnl
+dnl This file must be used under the terms of the CeCILL.
+dnl This source file is licensed as described in the file COPYING, which
+dnl you should have received as part of this distribution.  The terms
+dnl are also available at
+dnl http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
+dnl
+dnl Macros which process ./configure arguments
+dnl Ocaml Macros
+
+dnl Check if Ocaml is available on the system
+dnl @TODO add the possibility to specific a path
+AC_DEFUN([AC_CHECK_PROG_OCAML],[
+# checking for ocamlc
+	OCAMLC=
+	OCAMLOPT=
+	OCAMLDEP=
+	AC_CHECK_PROG(OCAMLC,ocamlc,ocamlc,no)
+	if test "$OCAMLC" = no; then
+		AC_MSG_ERROR([ocamlc not found. Mandatory to build the Scicos modelica compiler (Use --without-modelica to disable the Modelica compiler).])
+	fi
+	AC_CHECK_PROG(OCAMLOPT,ocamlopt,ocamlopt,no)
+	if test "$OCAMLOPT" = no; then
+		AC_MSG_ERROR([ocamlopt not found. Mandatory to build the Scicos modelica compiler.])
+	fi
+	AC_CHECK_PROG(OCAMLDEP,ocamldep,ocamldep,no)
+	if test "$OCAMLDEP" = no; then
+		AC_MSG_ERROR([ocamldep not found. Mandatory to build the Scicos modelica compiler.])
+	fi
+	AC_CHECK_PROG(OCAMLYACC,ocamlyacc,ocamlyacc,no)
+	if test "$OCAMLYACC" = no; then
+		AC_MSG_ERROR([ocamlyacc not found. Mandatory to build the Scicos modelica compiler.])
+	fi
+	AC_CHECK_PROG(OCAMLLEX,ocamllex,ocamllex,no)
+	if test "$OCAMLLEX" = no; then
+		AC_MSG_ERROR([ocamllex not found. Mandatory to build the Scicos modelica compiler.])
+	fi
+	AC_DEFINE([WITH_OCAML],[],[With OCAML])
+
+	AC_SUBST(OCAMLC)
+	AC_SUBST(OCAMLOPT)
+	AC_SUBST(OCAMLDEP)
+	AC_SUBST(OCAMLYACC)
+	AC_SUBST(OCAMLLEX)
+	AC_SUBST(WITH_OCAML)
+]
+)
+\ No newline at end of file