xen/include: compat/xlat.h may change with .config changes

$(xlat-y) getting derived from $(headers-y) means its contents may
change with changes to .config. The individual files $(xlat-y) refers
to, otoh, may not change, and hence not trigger rebuilding of xlat.h.
(Note that the issue was already present before the commit referred to
below, but it was far more limited in affecting only changes to
CONFIG_XSM_FLASK.)

Fixes: 2c8fabb2232d ("x86: only generate compat headers actually needed")
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
master commit: c7b0f25e8f86373ed54e1c446f8e67ce25ac6819
master date: 2021-01-26 14:42:23 +0100

diff --git a/xen/include/Makefile b/xen/include/Makefile
index 089314dc72414b3bf5cd4deeaa73dd4a8d2633a3..687aa130d88b0508b8a76848664145df9888590d 100644 (file)
--- a/xen/include/Makefile
+++ b/xen/include/Makefile
@@ -89,7 +89,7 @@ compat/.xlat/%.lst: xlat.lst Makefile
 xlat-y := $(shell sed -ne 's,@arch@,$(compat-arch-y),g' -re 's,^[?!][[:blank:]]+[^[:blank:]]+[[:blank:]]+,,p' xlat.lst | uniq)
 xlat-y := $(filter $(patsubst compat/%,%,$(headers-y)),$(xlat-y))
 
-compat/xlat.h: $(addprefix compat/.xlat/,$(xlat-y)) Makefile
+compat/xlat.h: $(addprefix compat/.xlat/,$(xlat-y)) config/auto.conf Makefile
        cat $(filter %.h,$^) >$@.new
        mv -f $@.new $@