From: Anthony PERARD <anthony.perard@citrix.com>
Date: Tue, 10 Aug 2021 07:27:13 +0000 (+0200)
Subject: build: rework .banner generation
X-Git-Tag: archive/raspbian/4.16.0+51-g0941d6cb-1+rpi1~2^2~42^2~297
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=44b9ec5a5c9c7a32cd75efd09e5693016b78e5c3;p=xen.git

build: rework .banner generation

Avoid depending on Makefile but still allow to rebuild the banner when
$(XEN_FULLVERSION) changes.

Also add a dependency on tools/xen.flf, even if not expected to
change.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
---

diff --git a/xen/Makefile b/xen/Makefile
index 8023680ffb..94e8371826 100644
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -378,13 +378,19 @@ delete-unfresh-files:
 		rm -f include/xen/compile.h; \
 	fi
 
-.banner: Makefile
-	@if which figlet >/dev/null 2>&1 ; then \
-		echo " Xen $(XEN_FULLVERSION)" | figlet -f tools/xen.flf > $@.tmp; \
-	else \
-		echo " Xen $(XEN_FULLVERSION)" > $@.tmp; \
-	fi
-	@mv -f $@.tmp $@
+quiet_cmd_banner = BANNER  $@
+define cmd_banner
+    if which figlet >/dev/null 2>&1 ; then \
+	echo " Xen $(XEN_FULLVERSION)" | figlet -f $< > $@.tmp; \
+    else \
+	echo " Xen $(XEN_FULLVERSION)" > $@.tmp; \
+    fi; \
+    mv -f $@.tmp $@
+endef
+
+.banner: tools/xen.flf FORCE
+	$(call if_changed,banner)
+targets += .banner
 
 # compile.h contains dynamic build info. Rebuilt on every 'make' invocation.
 include/xen/compile.h: include/xen/compile.h.in .banner