docs: check for documentation generation tools in docs/configure.

It is sometimes hard to discover all the optional tools that should be
on a system to build all available Xen documentation. By checking for
documentation generation tools at ./configure time and displaying a
warning, Xen packagers will more easily learn about new optional build
dependencies, like markdown, when they are introduced.

Based on a patch by Matt Wilson. Changed to use a separate
docs/configure which is called from the top-level in the same manner
as stubdoms.

Rerun autogen.sh and "git add docs/configure" after applying this patch.

Signed-off-by: Matt Wilson <msw@amazon.com>
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Matt Wilson <msw@amazon.com>
  (For the change to introduce docs/configure)
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/README b/README
index 5c335b9c25..6c4742fe3b 100644
--- a/README
+++ b/README
@@ -57,7 +57,6 @@ provided by your OS distributor:
     * GNU gettext
     * 16-bit x86 assembler, loader and compiler (dev86 rpm or bin86 & bcc debs)
     * ACPI ASL compiler (iasl)
-    * markdown
 
 In addition to the above there are a number of optional build
 prerequisites. Omitting these will cause the related features to be
@@ -66,6 +65,7 @@ disabled at compile time:
       ocaml-findlib). Required to build ocaml components which
       includes the alternative ocaml xenstored.
     * cmake (if building vtpm stub domains)
+    * markdown
 
 Second, you need to acquire a suitable kernel for use in domain 0. If
 possible you should use a kernel provided by your OS distributor. If