On 12/12/2019 18:27, Anthony PERARD wrote:
> This patch updates Kconfig to a more recent version of Kconfig, found
> in Linux v5.4.0, 219d54332a09 ("Linux 5.4").
>
> With the updated version of Kconfig, other changes are necessary to
> avoid breaking the build.
>
> Kconfig files:
> - fix Kconfig files that where using option env=*:
> Since Linux commit 104daea149c4 ("kconfig: reference environment
> variables directly and remove 'option env='"), we can access the
> environment directly via $() and "option env=" as been removed.
> - CONFIG_EXPERT='y' will now appear in .config file if
> XEN_CONFIG_EXPERT=y in the environment. The alternative is to change
> "EXPERT" to "$(XEN_CONFIG_EXPERT)" in all Kconfig files.
>
> Makefile:
> - silentoldconfig target as been removed from Kconfig. To update
> include/generated/autoconf.h, we need to use syncconfig target
> instead.
>
> Makefile.kconfig:
> - Import newer needed code from Linux's Makefile.lib and
> Kbuild.include and Makefile.build.
> - Set Q to empty, Xen build system doesn't silence commands. Having Q
> empty mean we can import stuff from Linux without having to remove the
> leading $(Q) from build commands. And quiet='' means commands will be
> echoed.
> - Add $(PHONY) to .PHONY. Like it is intended by Kbuild.
>
> Makefile.host is also updated and copied from Linux.
>
> Dependency change:
> - Now depends on flex/bison, maybe we could _shipped those files like
> before. Linux doesn't do that anymore.
Content like that should not be checked in to being with, and I think it
is entirely reasonable to require flex/bison in a build environment.
Indeed, README lists them as mandatory requirements.
> Signed-off-by: Anthony PERARD <[email protected]>
Acked-by: Andrew Cooper <[email protected]>
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