From: Anthony PERARD <anthony.perard@citrix.com>
To: <xen-devel@lists.xenproject.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>,
Julien Grall <julien@xen.org>, Wei Liu <wl@xen.org>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Ian Jackson <ian.jackson@eu.citrix.com>,
George Dunlap <george.dunlap@citrix.com>,
Jan Beulich <jbeulich@suse.com>,
Anthony PERARD <anthony.perard@citrix.com>
Subject: [Xen-devel] [XEN PATCH] build: detect compiler upgrade to rerun kconfig
Date: Thu, 26 Mar 2020 13:56:21 +0000 [thread overview]
Message-ID: <20200326135621.687685-1-anthony.perard@citrix.com> (raw)
This simple comment allows to detect when $(CC) changes version.
Kconfig will be rerun in this case. (Rerun is forced by
include/config.auto.cmd which detects changes of CC_VERSION_TEXT
value).
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
---
xen/Kconfig | 2 ++
xen/Makefile | 4 ++++
2 files changed, 6 insertions(+)
diff --git a/xen/Kconfig b/xen/Kconfig
index 073042f46730..4ffa2f90a267 100644
--- a/xen/Kconfig
+++ b/xen/Kconfig
@@ -4,6 +4,8 @@
#
mainmenu "Xen/$(SRCARCH) $(XEN_FULLVERSION) Configuration"
+comment "Compiler: $(CC_VERSION_TEXT)"
+
source "scripts/Kconfig.include"
config BROKEN
diff --git a/xen/Makefile b/xen/Makefile
index e5f7b1ae13bc..6dadb3afc119 100644
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -277,6 +277,10 @@ $(foreach base,arch/x86/mm/guest_walk_% \
arch/x86/mm/shadow/guest_%, \
$(foreach ext,o i s,$(call build-intermediate,$(base).$(ext))))
+# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
+# and from include/config/auto.conf.cmd to detect the compiler upgrade.
+export CC_VERSION_TEXT := $(shell $(CC) --version 2>/dev/null | head -n 1)
+
kconfig := oldconfig config menuconfig defconfig allyesconfig allnoconfig \
nconfig xconfig gconfig savedefconfig listnewconfig olddefconfig \
randconfig $(notdir $(wildcard arch/$(SRCARCH)/configs/*_defconfig))
--
Anthony PERARD
next reply other threads:[~2020-03-26 13:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-26 13:56 Anthony PERARD [this message]
2020-03-26 14:02 ` [Xen-devel] [XEN PATCH] build: detect compiler upgrade to rerun kconfig Andrew Cooper
2020-03-26 14:16 ` Anthony PERARD
2020-03-26 14:48 ` Jan Beulich
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