New file to check for libxml.

2000-01-12  Martin Baulig  <martin@home-of-linux.org>

	* xml.m4: New file to check for libxml.

	* configure.in: Call `LIBGTOP_XML_HOOK' from `xml.m4' and
	add libxml libraries to `LIBGTOP_EXTRA_LIBS' when found.

xml.m4

@@ -0,0 +1,36 @@
+dnl
+dnl LIBGTOP_XML_HOOK (script-if-xml-found, failflag)
+dnl
+dnl If failflag is "failure", script aborts due to lack of XML
+dnl 
+dnl Check for availability of the libxml library
+dnl the XML parser uses libz if available too
+dnl
+
+AC_DEFUN([LIBGTOP_XML_HOOK],[
+	LIBGTOP_XML_LIB=
+	AC_PATH_PROG(XML_CONFIG,xml-config,no)
+	if test "$XML_CONFIG" = no; then
+		if test x$2 = xfailure; then
+			AC_MSG_ERROR(Could not find xml-config)
+		else
+			AC_MSG_WARN(Could not find xml-config)
+		fi
+	else
+		AC_CHECK_LIB(xml, xmlNewDoc, [
+			$1
+			LIBGTOP_XML_LIB=`$XML_CONFIG --libs`
+		], [
+			if test x$2 = xfailure; then 
+				AC_MSG_ERROR(Could not link sample xml program)
+			else
+				AC_MSG_WARN(Could not link sample xml program)
+			fi
+		], `$XML_CONFIG --libs`)
+	fi
+	AC_SUBST(LIBGTOP_XML_LIB)
+])
+
+AC_DEFUN([LIBGTOP_XML_CHECK], [
+	LIBGTOP_XML_HOOK([],failure)
+])