List xproto.xml path explicitly instead of relying on GNU Make $< expansion

(Some non-gnu makes, such as Solaris make, only recognize $< in implicit
 suffix rules, not explicit ones like this.)

diff --git a/src/Makefile.am b/src/Makefile.am
index 43f7236..0715708 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -221,7 +221,7 @@ SUFFIXES = .xml
                    -o $@ $(srcdir)/c-client.xsl $< 
 
 xproto.xml: $(XCBPROTO_XCBINCLUDEDIR)/xproto.xml
-       $(LN_S) $< $@
+       $(LN_S) $(XCBPROTO_XCBINCLUDEDIR)/xproto.xml $@
 
 $(EXTENSION_XML):
        [ -d extensions ] || mkdir extensions