linux-kernel - Re: commit ("1e860048c53ee gcc-plugins: simplify GCC plugin-dev capability test")

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Message-ID: <25ae82e1-e864-807f-9ca5-f6571ef3a12b@kernel.org>
Date:   Thu, 7 Jan 2021 08:45:15 -0600
From:   Dinh Nguyen <dinguyen@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     linux-kernel@...r.kernel.org, masahiroy@...nel.org
Subject: Re: commit ("1e860048c53ee gcc-plugins: simplify GCC plugin-dev
 capability test")



On 1/6/21 5:14 PM, Kees Cook wrote:
> On Wed, Jan 06, 2021 at 08:44:58AM -0600, Dinh Nguyen wrote:
>> Hi Masahiro,
>>
>> With v5.11-rc1 and commit("1e860048c53ee gcc-plugins: simplify GCC
>> plugin-dev capability test"), I get this error for my arm socfpga_defconfig
>> build. I have been building the kernel the same way for many years now. Do
>> you know what I might be doing wrong?
>>
>> $ make ARCH=arm CROSS_COMPILE=${CROSS_COMPILE}
>>    SYNC    include/config/auto.conf.cmd
>>    SYSHDR  arch/arm/include/generated/uapi/asm/unistd-common.h
>>    SYSHDR  arch/arm/include/generated/uapi/asm/unistd-oabi.h
>>    SYSHDR  arch/arm/include/generated/uapi/asm/unistd-eabi.h
>>    REMOVE  arch/arm/include/generated/asm/mm-arch-hooks.h
>>    HOSTCXX scripts/gcc-plugins/arm_ssp_per_task_plugin.so
>> In file included from scripts/gcc-plugins/gcc-common.h:103:0,
>>                   from scripts/gcc-plugins/arm_ssp_per_task_plugin.c:3:
>> /home/dinguyen/linux_dev/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf/bin/../lib/gcc/arm-none-linux-gnueabihf/10.2.1/plugin/include/builtins.h:23:10:
>> fatal error: mpc.h: No such file or directory
>> #include <mpc.h>
>>            ^~~~~~~
>> compilation terminated.
>> scripts/gcc-plugins/Makefile:47: recipe for target
>> 'scripts/gcc-plugins/arm_ssp_per_task_plugin.so' failed
>> make[2]: *** [scripts/gcc-plugins/arm_ssp_per_task_plugin.so] Error 1
>> scripts/Makefile.build:496: recipe for target 'scripts/gcc-plugins' failed
>> make[1]: *** [scripts/gcc-plugins] Error 2
>> Makefile:1190: recipe for target 'scripts' failed
>> make: *** [scripts] Error 2
>> make: *** Waiting for unfinished jobs....
>>    UPD     include/config/kernel.release
>>
>> Thanks,
>> Dinh
> 
> Hi! Thanks for the report. Other folks have also encountered this,
> and it appears to be a problem with distro packaging of the gcc plugin
> development packages. You'll need to install the GNU multiprecision
> libraries ("gmp-devel" on most rpm-based systems, "libgmp-dev" on most
> debian systems)[1].
> 
> Hopefully that'll work!
> 

Thanks, that worked! I also had to install libmpc-dev as well.

Dinh