From 7e57cd98570694f4630e8c34726af844e3981755 Mon Sep 17 00:00:00 2001
From: Ludovic Courtès
Date: Mon, 22 Dec 2008 00:27:46 +0100
Subject: Document dependency on SXML and HTMLPrag for the `rss-2' reader.

* configure.ac: Check for `(sxml simple)' and `(htmlprag)'.

* README: Mention dependency on Guile-Lib.
---
 README       | 7 ++++++-
 configure.ac | 6 ++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/README b/README
index 91a37f7..feaa435 100644
--- a/README
+++ b/README
@@ -50,7 +50,7 @@ programs to produce PS/PDF files:
   * ConTeXt
     http://www.pragma-ade.nl/
 
-Optionally, to produce pie charts, you may want to use:
+To produce pie charts, you may want to use:
 
   * Ploticus
     http://ploticus.sourceforge.net/
@@ -60,6 +60,11 @@ To convert images in the `fig' format:
   * Xfig, Transfig
     http://xfig.org/
 
+To be able to use the `rss-2' reader, you will need:
+
+  * Guile-Lib (specifically, `sxml' and `htmlprag' modules)
+    http://home.gna.org/guile-lib/
+
 This is it!
 
 
diff --git a/configure.ac b/configure.ac
index 70e23c0..7d6d011 100644
--- a/configure.ac
+++ b/configure.ac
@@ -50,6 +50,12 @@ GUILE_MODULE_REQUIRED([srfi srfi-37])
 # Make sure we're not using the broken SRFI-35 from Guile-Lib <= 0.1.6.
 SKR_GUILE_SRFI_35_WORKS
 
+# Check for SXML and HTMLPrag from Guile-Lib, needed for the `rss-2' reader.
+GUILE_MODULE_AVAILABLE([have_sxml_simple], [(sxml simple)])
+GUILE_MODULE_AVAILABLE([have_htmlprag],    [(htmlprag)])
+if test "x$have_sxml_simple$have_htmlprag" != "xyesyes"; then
+  AC_MSG_WARN([Guile-Lib modules needed by the `rss-2' reader are missing.])
+fi
 
 # Look for `convert', from ImageMagick.
 AC_PATH_PROG([CONVERT], [convert])
-- 
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