--- modules/presence/Makefile.orig	2020-07-22 09:42:09 UTC
+++ modules/presence/Makefile
@@ -10,8 +10,12 @@ auto_gen=
 NAME=presence.so
 
 ifeq ($(CROSS_COMPILE),)
-LIBS=-lxml2
-DEFS+=-I$(SYSBASE)/include/libxml2
+HAS_XML2CFG=$(shell if which xml2-config >/dev/null 2>/dev/null;then echo YES; fi)
+endif
+
+ifeq ($(HAS_XML2CFG),YES)
+LIBS=$(shell xml2-config --libs)
+DEFS+=$(shell xml2-config --cflags)
 else
 DEFS+=-I$(SYSBASE)/include/libxml2 -I$(LOCALBASE)/include/libxml2 \
       -I$(LOCALBASE)/include