From cbdbafbef1e3eaebcf057e15afdef9e6b387e058 Mon Sep 17 00:00:00 2001
From: Mukund Sivaraman <muks@isc.org>
Date: Thu, 25 Jul 2013 11:25:39 +0530
Subject: [PATCH] [3067] Detect if elinks exists before trying to use it to
 generate docs

---
 configure.ac          | 5 +++++
 doc/guide/Makefile.am | 4 +---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index 72a825edd8..e0d0fd8bcb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1132,6 +1132,11 @@ if test "x$enable_generate_docs" != xno ; then
     fi
     AC_MSG_RESULT(yes)
   fi
+
+  AC_PATH_PROG([ELINKS], [elinks])
+  if test -z "$ELINKS"; then
+    AC_MSG_ERROR("elinks not found; it is required for --enable-generate-docs")
+  fi
 fi
 
 
diff --git a/doc/guide/Makefile.am b/doc/guide/Makefile.am
index 1d63c04b31..8f3aaaf23b 100644
--- a/doc/guide/Makefile.am
+++ b/doc/guide/Makefile.am
@@ -21,10 +21,8 @@ bind10-guide.html: bind10-guide.xml
 		http://docbook.sourceforge.net/release/xsl/current/html/docbook.xsl \
 		$(srcdir)/bind10-guide.xml
 
-HTML2TXT = elinks -dump -no-numbering -no-references
-
 bind10-guide.txt: bind10-guide.html
-	$(HTML2TXT) bind10-guide.html > $@
+	@ELINKS@ -dump -no-numbering -no-references bind10-guide.html > $@
 
 bind10-messages.html: bind10-messages.xml
 	@XSLTPROC@ --novalid --xinclude --nonet \