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

[Dinh Nguyen]

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