$NetBSD: patch-xen_include_Makefile,v 1.1 2021/04/18 12:31:26 bouyer Exp $

also filter out flags added by pkgsrc

--- xen/include/Makefile.orig	2020-12-10 17:08:48.270718042 +0100
+++ xen/include/Makefile	2020-12-10 17:11:56.553825047 +0100
@@ -57,7 +57,7 @@
 	mv -f $@.new $@
 
 compat/%.i: compat/%.c Makefile
-	$(CPP) $(filter-out -Wa$(comma)% -include %/include/xen/config.h,$(XEN_CFLAGS)) $(cppflags-y) -o $@ $<
+	$(filter-out -Wa$(comma)% -g3 -include %/include/xen/config.h,$(CPP) $(XEN_CFLAGS)) $(cppflags-y) -o $@ $<
 
 compat/%.c: public/%.h xlat.lst Makefile $(BASEDIR)/tools/compat-build-source.py
 	mkdir -p $(@D)