Show an error message if autoconf isn't found

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401568

autogen.sh

@@ -5,9 +5,14 @@ echo "This may take a while ..."
 
 # Regenerate configuration files
 cp acinclude.m4 aclocal.m4
+found=false
 for autoconf in autoconf autoconf259
-do if which $autoconf >/dev/null; then $autoconf; break; fi
+do if which $autoconf >/dev/null 2>&1; then $autoconf && found=true; break; fi
 done
+if test x$found = xfalse; then
+    echo "Couldn't find autoconf, aborting"
+    exit 1
+fi
 (cd test; sh autogen.sh)
 
 # Run configure for this platform

test/autogen.sh

@@ -2,6 +2,11 @@
 #
 # Regenerate configuration files
 cp acinclude.m4 aclocal.m4
+found=false
 for autoconf in autoconf autoconf259
-do if which $autoconf >/dev/null; then $autoconf; break; fi
+do if which $autoconf >/dev/null 2>&1; then $autoconf && found=true; break; fi
 done
+if test x$found = xfalse; then
+    echo "Couldn't find autoconf, aborting"
+    exit 1
+fi