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[for-4.19][PATCH] build: Allow setting KBUILD_DEFCONFIG in the environment
- To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Michal Orzel <michal.orzel@xxxxxxx>
- Date: Wed, 25 Oct 2023 10:28:34 +0200
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- Cc: Michal Orzel <michal.orzel@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, "Jan Beulich" <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, "Stefano Stabellini" <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Wed, 25 Oct 2023 08:29:07 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
At the moment, in order to use a different defconfig target than default,
one needs to specify KBUILD_DEFCONFIG=<target> on the command line.
Switch to weak assignment, so that it can be also obtained from
environment similar to other KCONFIG/KBUILD variables.
This change will activate the use of KBUILD_DEFCONFIG variable in CI
build jobs that so far had no effect.
Note, that we will deviate from Linux in this regard.
Signed-off-by: Michal Orzel <michal.orzel@xxxxxxx>
---
In case of reluctance to this approach, we can always do:
make -C xen defconfig KBUILD_DEFCONFIG=${KBUILD_DEFCONFIG}
in automation/scripts/build.
Also, Linux defers setting the variable to arch specific Makefile, so it is not
sth mandated by the top level Makefile or documentation.
---
xen/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/xen/Makefile b/xen/Makefile
index fd0e63d29efb..40feefff4ab5 100644
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -256,7 +256,8 @@ export YACC = $(if $(BISON),$(BISON),bison)
export LEX = $(if $(FLEX),$(FLEX),flex)
# Default file for 'make defconfig'.
-export KBUILD_DEFCONFIG := $(ARCH)_defconfig
+# May be overruled on the command line or set in the environment.
+export KBUILD_DEFCONFIG ?= $(ARCH)_defconfig
# Copy CFLAGS generated by "Config.mk" so they can be reused later without
# reparsing Config.mk by e.g. arch/x86/boot/.
--
2.25.1
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