[rygel] build: Check whether we can generate the manpages

[Jens Georg <jensgeorg src gnome org>]

commit 1fafc4ba0179e3efcd43111c56d7691f7affd993
Author: Jens Georg <mail jensge org>
Date:   Tue Jun 14 22:01:25 2016 +0200

    build: Check whether we can generate the manpages
    
    Signed-off-by: Jens Georg <mail jensge org>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=767458

 configure.ac |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4f6327c..fd85125 100644
--- a/configure.ac
+++ b/configure.ac
@@ -458,6 +458,12 @@ AM_SILENT_RULES([yes])
 
 dnl documenation
 AC_PATH_PROG([XSLTPROC], [xsltproc])
+AS_IF([test "x$XSLTPROC" != "x"],
+      [
+       AC_MSG_CHECKING([whether $XSLTPROC can create manpages])
+       $XSLTPROC -nonet http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl >/dev/null 
2>&1
+       AS_IF([test "$?" = 0], [AC_MSG_RESULT([yes])], [XSLTPROC=""; AC_MSG_RESULT([no])])
+      ])
 AM_CONDITIONAL([HAVE_XSLTPROC], [test x"$XSLTPROC" != x])
 
 dnl Use valadoc and gtk-doc for API documentation: