Exporting patch:
# HG changeset patch
# User Muli Ben-Yehuda <mulix@mulix.org>
# Node ID 11e4f65368c2a8d1c583ad19621c58d155d0cd20
# Parent  446aa56ca4fee7d3ea2badfb59e8bb3540b507ae
building the kernels should fail if patch(1) is not available when
patching the kernel, rather than failing later when trying to build
the unpatched kernel. 
- set -e
- avoid two subshells so that make notices our exit status

diff -r 446aa56ca4fee7d3ea2badfb59e8bb3540b507ae -r 11e4f65368c2a8d1c583ad19621c58d155d0cd20 buildconfigs/Rules.mk
--- a/buildconfigs/Rules.mk	Mon Oct 17 12:50:28 2005
+++ b/buildconfigs/Rules.mk	Wed Oct 19 02:10:00 2005
@@ -80,10 +80,11 @@
 	rm -f patches/*/.makedep
 
 ref-%/.valid-ref: pristine-%/.valid-pristine
+	set -e
 	rm -rf $(@D)
 	cp -al $(<D) $(@D)
-	([ -d patches/$* ] && \
-	  for i in patches/$*/*.patch ; do ( cd $(@D) ; patch -p1 <../$$i || exit 1 ) ; done) || true
+	[ -d patches/$* ] || exit 1
+	for i in patches/$*/*.patch ; do cd $(@D) ; patch -p1 <../$$i || exit 1; done
 	touch $@ # update timestamp to avoid rebuild
 endif