linux-kernel - Re: [PATCH v2] kbuild: make samples really depend on headers

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Date:   Wed, 8 Aug 2018 11:23:06 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     David Howells <dhowells@...hat.com>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Arnd Bergmann <arnd@...db.de>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] kbuild: make samples really depend on headers_install

2018-08-08 11:14 GMT+09:00 Masahiro Yamada <yamada.masahiro@...ionext.com>:
> Kernel headers must be installed into $(objtree)/usr/include to avoid
> the build failure of samples.
>
> Commit ddea05fa148b ("kbuild: make samples depend on headers_install")
> addressed this, but "samples/" is only used for the single target build.
>
> "make samples/" properly installs kernel headers, but it does not work
> for general building because a phony target "sample" (no trailing slash)
> is used.
>
> Reported-by: David Howells <dhowells@...hat.com>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> ---


David,
Could you check this patch, please?

Will you apply this to your tree
to fix the vfs sample issue?

Please let me know your thought.

Thanks.





> Changes in v2:
>   - Correct commit log (backslash -> slash)
>   - Fix a typo
>
>  Makefile | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/Makefile b/Makefile
> index 7a3c454..1e47d13 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1009,9 +1009,10 @@ ifdef CONFIG_GDB_SCRIPTS
>  endif
>         +$(call if_changed,link-vmlinux)
>
> -# Build samples along the rest of the kernel
> +# Build samples along the rest of the kernel. This needs headers_install.
>  ifdef CONFIG_SAMPLES
>  vmlinux-dirs += samples
> +samples: headers_install
>  endif
>
>  # The actual objects are generated when descending,
> --
> 2.7.4
>
> --
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-- 
Best Regards
Masahiro Yamada