- AS_IF(["$PYTHON" -c 'import lxml' 2>/dev/null], [have_lxml=yes], [have_lxml=no])
- AS_IF([test "$PYTHON" != : -a $have_lxml = yes], [have_python=yes])
+ AS_IF([test "x$PYTHON" != "x:"], [
+ AC_MSG_CHECKING([for python lxml module])
+ AS_IF(["$PYTHON" -c 'import lxml' 2>/dev/null], [have_lxml=yes])
+ AC_MSG_RESULT([$have_lxml])
+ AS_IF([test "x$have_lxml" = "xyes"], [have_python=yes],
+ [AC_MSG_WARN([*** python support requires python-lxml module installed])])
+ ])
+])
+AS_IF([test "$have_python" != "yes"], [
+ AS_IF([test "$with_python" = "yes"],
+ [AC_MSG_ERROR([*** python support requested but python support not found])])
+ AS_IF([test "$with_python" != "no"],
+ [AC_MSG_WARN([*** python support not found, some documentation cannot be built])])