From 67f16b1a9e578bf2796cb5d4c7057ca984df3ecb Mon Sep 17 00:00:00 2001
From: Jeremy Sowden <jeremy@azazel.net>
Date: Mon, 7 Sep 2020 11:39:04 +0100
Subject: build: check whether dot is available when configuring doxygen.

Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Tested-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index d8d1d38..32e4990 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,6 +41,10 @@ AC_ARG_WITH([doxygen], [AS_HELP_STRING([--with-doxygen],
 	    [], [with_doxygen=no])
 AS_IF([test "x$with_doxygen" = xyes], [
 	AC_CHECK_PROGS([DOXYGEN], [doxygen])
+	AC_CHECK_PROGS([DOT], [dot], [""])
+	AS_IF([test "x$DOT" != "x"],
+	      [AC_SUBST(HAVE_DOT, YES)],
+	      [AC_SUBST(HAVE_DOT, NO)])
 ])
 
 AM_CONDITIONAL([HAVE_DOXYGEN], [test -n "$DOXYGEN"])
-- 
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