+dnl Check for docbook
+AC_DEFUN(AX_CHECK_DOCBOOK, [
+ # It's just rude to go over the net to build
+ XSLTPROC_FLAGS=--nonet
+ DOCBOOK_ROOT=
+ XSLTPROC_WORKS=no
+
+ AC_ARG_WITH(docbook,
+ AS_HELP_STRING(
+ [--with-docbook],
+ [Path to Docbook XSL directory]
+ ),
+ [DOCBOOK_ROOT=$withval]
+ )
+
+ if test -n "$DOCBOOK_ROOT" ; then
+ AC_CHECK_PROG(XSLTPROC,xsltproc,xsltproc,)
+ if test -n "$XSLTPROC"; then
+ AC_MSG_CHECKING([whether xsltproc works])
+ DB_FILE="$DOCBOOK_ROOT/html/docbook.xsl"
+ $XSLTPROC $XSLTPROC_FLAGS $DB_FILE >/dev/null 2>&1 << END
+<?xml version="1.0" encoding='ISO-8859-1'?>
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
+<book id="test">
+</book>
+END
+ if test "$?" = 0; then
+ XSLTPROC_WORKS=yes
+ fi
+ AC_MSG_RESULT($XSLTPROC_WORKS)
+ fi
+ fi
+
+ AC_MSG_CHECKING([whether to build Docbook documentation])
+ AC_MSG_RESULT($XSLTPROC_WORKS)
+
+ AM_CONDITIONAL(HAVE_XSLTPROC, test x"$XSLTPROC_WORKS" = x"yes")
+ AC_SUBST(XSLTPROC_FLAGS)
+ AC_SUBST(DOCBOOK_ROOT)
+ AC_SUBST(XSLTPROC)
+])
+