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Re: [PATCH] build/xen: fail to rebuild if Kconfig fails
- To: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 15 Feb 2024 17:22:00 +0100
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- Cc: Anthony Perard <anthony.perard@xxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 15 Feb 2024 16:22:14 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 15.02.2024 17:08, Roger Pau Monné wrote:
> On Thu, Feb 15, 2024 at 02:02:41PM +0100, Jan Beulich wrote:
>> --- a/xen/Rules.mk
>> +++ b/xen/Rules.mk
>> @@ -15,7 +15,11 @@ srcdir := $(srctree)/$(src)
>> PHONY := __build
>> __build:
>>
>> --include $(objtree)/include/config/auto.conf
>> +ifneq ($(obj),tools)
>> +ifneq ($(obj),tools/kconfig)
>> +include $(objtree)/include/config/auto.conf
>> +endif
>> +endif
>
> Trying to understand this, I assume it's to avoid an infinite
> dependency loop that generating include/config/auto.conf requires some
> tools that are build using xen/Rules.mk?
The file has dependencies only in xen/Makefile. This is about the
file simply not being there when initially building. Perhaps the
patch description helps that I've written in the meantime:
"Because of using "-include", failure to (re)build auto.conf (with
auto.conf.cmd produced as a secondary target) won't stop make from
continuing the build. Arrange for it being possible to drop the - from
Rules.mk, requiring that the include be skipped for tools-only targets.
Note that relying on the inclusion in those cases wouldn't be correct
anyway, as it might be a stale file (yet to be rebuilt) which would be
included, while during initial build, the file would be absent
altogether."
Jan
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