AC_MSG_ERROR([Please install nickle to build AltOs])
fi
+AC_CHECK_PROG([HAVE_ASCIIDOCTOR_PDF], [asciidoctor-pdf], yes, no)
+if test "x$HAVE_ASCIIDOCTOR_PDF" = "xno"; then
+ AC_MSG_WARN([asciidoctor-pdf not found, PDF docs will not be built])
+fi
+AM_CONDITIONAL([ASCIIDOCTOR_PDF], [test x$HAVE_ASCIIDOCTOR_PDF != xno])
+
PKG_CHECK_MODULES([JANSSON], [jansson])
AC_ARG_WITH([readline],