[anjuta] Check for yelp-tools to avoid an error later

[Sebastien Granjoux <sgranjoux src gnome org>]

commit 9d07aabbad7ba3e2f114e24fa804f93f7867d01b
Author: Sébastien Granjoux <seb sfo free fr>
Date:   Sat Oct 3 14:21:19 2015 +0200

    Check for yelp-tools to avoid an error later
    
    Makefile:628 *** missing separator

 autogen.sh |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index 951a943..3bc508f 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,9 +1,17 @@
 #!/bin/sh
 # Run this to generate all the initial makefiles, etc.
 
-srcdir=`dirname $0`
+
 test -z "$srcdir" && srcdir=.
 
+GNOMEDOC=`which yelp-build`
+if test -z $GNOMEDOC; then
+        echo "*** The tools to build the documentation are not found,"
+        echo "    please intall the yelp-tool package ***"
+        exit 1
+fi
+
+srcdir=`dirname $0`
 echo "Generating initial interface files"
 sh -c "cd $srcdir/libanjuta/interfaces && \
 perl anjuta-idl-compiler.pl libanjuta && \