Xen devel - Aug 2005 - [PATCH] allow clean build when sparse trees/patches not present

When building in a tree with (the sparse trees and) the patches
stripped,
a warning is issued by make, which the below patch eliminates.

Signed-off-by: Jan Beulich <jbeulich@novell.com>

diff -Npru /home/jbeulich/src/xen/2005-08-20/buildconfigs/Rules.mk
2005-08-20/buildconfigs/Rules.mk
---
/home/jbeulich/src/xen/2005-08-20/buildconfigs/Rules.mk	2005-08-04
01:13:58.000000000 +0200
+++ 2005-08-20/buildconfigs/Rules.mk	2005-08-20 11:42:41.000000000
+0200
@@ -66,6 +66,7 @@ pristine-%/.valid-pristine: %.tar.bz2
 
 PATCHDIRS := $(wildcard patches/*-*)
 
+ifneq ($(PATCHDIRS),)
 -include $(patsubst %,%/.makedep,$(PATCHDIRS))
 
 $(patsubst patches/%,patches/%/.makedep,$(PATCHDIRS)):
patches/%/.makedep: 
@@ -80,6 +81,7 @@ ref-%/.valid-ref: pristine-%/.valid-pris
 	([ -d patches/$* ] && \
 	  for i in patches/$*/*.patch ; do ( cd $(@D) ; patch -p1
<../$$i || exit 1 ) ; done) || true
 	touch $@ # update timestamp to avoid rebuild
+endif
 
 %-build:
 	$(MAKE) -f buildconfigs/mk.$* build



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