From 63a55ccde74bd8ec7bac6ef5e4a54f2a803b2024 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Mon, 28 Jan 2013 09:56:11 +0000
Subject: [PATCH] configure: Detect camlp4 and bail if not available.

---
 configure.ac | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/configure.ac b/configure.ac
index 177a166..dddaf3c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -52,6 +52,12 @@ if test "$OCAMLFIND" = "no"; then
     AC_MSG_ERROR([You must install OCaml findlib (ocamlfind)])
 fi
 
+dnl Check for camlp4.
+AC_PROG_CAMLP4
+if test "$CAMLP4" = "no"; then
+    AC_MSG_ERROR([You must install the OCaml 'camlp4' preprocessor package])
+fi
+
 dnl Check for all OCaml packages.
 AC_CHECK_OCAML_PKG([lablgtk2])
 if test "$OCAML_PKG_lablgtk2" = "no"; then
-- 
1.8.3.1