linux-kernel - Re: [PATCH] kbuild: fix UML build error with CONFIG_GCC

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Date:   Sat, 1 Dec 2018 23:51:42 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Cc:     Kees Cook <keescook@...omium.org>,
        Emese Revfy <re.emese@...il.com>,
        "H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...en8.de>,
        X86 ML <x86@...nel.org>, linux-um@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Michal Marek <michal.lkml@...kovi.net>,
        Richard Weinberger <richard@....at>,
        Ingo Molnar <mingo@...hat.com>, Jeff Dike <jdike@...toit.com>
Subject: Re: [PATCH] kbuild: fix UML build error with CONFIG_GCC_PLUGINS

On Thu, Nov 29, 2018 at 12:01 PM Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
>
> UML fails to build with CONFIG_GCC_PLUGINS=y.
>
> $ make -s ARCH=um mrproper
> $ make -s ARCH=um allmodconfig
> $ make ARCH=um
>   UPD     include/generated/uapi/linux/version.h
>   WRAP    arch/x86/include/generated/uapi/asm/bpf_perf_event.h
>   WRAP    arch/x86/include/generated/uapi/asm/poll.h
>   WRAP    arch/x86/include/generated/asm/dma-contiguous.h
>   WRAP    arch/x86/include/generated/asm/early_ioremap.h
>   WRAP    arch/x86/include/generated/asm/export.h
>   WRAP    arch/x86/include/generated/asm/mcs_spinlock.h
>   WRAP    arch/x86/include/generated/asm/mm-arch-hooks.h
>   SYSTBL  arch/x86/include/generated/asm/syscalls_32.h
>   SYSHDR  arch/x86/include/generated/asm/unistd_32_ia32.h
>   SYSHDR  arch/x86/include/generated/asm/unistd_64_x32.h
>   SYSTBL  arch/x86/include/generated/asm/syscalls_64.h
>   SYSHDR  arch/x86/include/generated/uapi/asm/unistd_32.h
>   SYSHDR  arch/x86/include/generated/uapi/asm/unistd_64.h
>   SYSHDR  arch/x86/include/generated/uapi/asm/unistd_x32.h
>   HOSTCC  scripts/unifdef
>   CC      arch/x86/um/user-offsets.s
> cc1: error: cannot load plugin ./scripts/gcc-plugins/cyc_complexity_plugin.so
> ./scripts/gcc-plugins/cyc_complexity_plugin.so: cannot open shared object file: No such file or directory
> cc1: error: cannot load plugin ./scripts/gcc-plugins/structleak_plugin.so
> ./scripts/gcc-plugins/structleak_plugin.so: cannot open shared object file: No such file or directory
> cc1: error: cannot load plugin ./scripts/gcc-plugins/latent_entropy_plugin.so
> ./scripts/gcc-plugins/latent_entropy_plugin.so: cannot open shared object file: No such file or directory
> cc1: error: cannot load plugin ./scripts/gcc-plugins/randomize_layout_plugin.so
> ./scripts/gcc-plugins/randomize_layout_plugin.so: cannot open shared object file: No such file or directory
> make[1]: *** [scripts/Makefile.build;119: arch/x86/um/user-offsets.s] Error 1
> make: *** [arch/um/Makefile;152: arch/x86/um/user-offsets.s] Error 2
>
> Change the order of the preparation stage (with cleanups) to make sure
> gcc-plugins is built before descending to arch/x86/um/.
>
> Reported-by: kbuild test robot <lkp@...el.com>
> Fixes: 6b90bd4ba40b ("GCC plugin infrastructure")
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> ---


Applied to linux-kbuild.


>
> I will pick up this to kbuild tree to avoid conflicts.
> Ack from UML people is appreciated, though.
>
>
-- 
Best Regards
Masahiro Yamada