linux-kernel - Re: [kbuild-all] Re: include/linux/compiler_types.h:315:38: error: call to '__compiletime_assert_536' declared with attribute error: BUILD_BUG_ON failed: offsetof(struct can_frame, len) != offsetof(struct canfd_frame, len) || offsetof(struct can

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Date:   Tue, 23 Mar 2021 17:35:21 +0800
From:   Rong Chen <rong.a.chen@...el.com>
To:     Marc Kleine-Budde <mkl@...gutronix.de>,
        Oliver Hartkopp <socketcan@...tkopp.net>
Cc:     Patrick Menschel <menschel.p@...teo.de>,
        kernel test robot <lkp@...el.com>, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, linux-can <linux-can@...r.kernel.org>
Subject: Re: [kbuild-all] Re: include/linux/compiler_types.h:315:38: error:
 call to '__compiletime_assert_536' declared with attribute error:
 BUILD_BUG_ON failed: offsetof(struct can_frame, len) != offsetof(struct
 canfd_frame, len) || offsetof(struct can_frame, data) != offsetof(struc...



On 3/23/21 4:59 PM, Rong Chen wrote:
>
>
> On 3/23/21 4:54 PM, Marc Kleine-Budde wrote:
>> On 23.03.2021 09:32:10, Oliver Hartkopp wrote:
>>> I wonder if the compiler configurations (gcc -v) or the options used at
>>> kernel build time are identical.
>> I tested several compilers and with my .config never triggered a
>> problem, but with Rong Chen it does. I'm trying to figure out which
>> option it is, stay tuned.
>>
>> Marc
>>
>
> Hi Marc, Oliver,
>
> We use the below cross compiler:
>
> https://download.01.org/0day-ci/cross-package/gcc-9.3.0-nolibc/x86_64-gcc-9.3.0-nolibc_arm-linux-gnueabi.tar.xz 
>
>
> and here is the detail:
>
> $ 
> /home/nfs/0day/gcc-9.3.0-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc 
> -v
> Using built-in specs.
> COLLECT_GCC=/home/nfs/0day/gcc-9.3.0-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc 
>
> COLLECT_LTO_WRAPPER=/home/nfs/0day/gcc-9.3.0-nolibc/arm-linux-gnueabi/bin/../libexec/gcc/arm-linux-gnueabi/9.3.0/lto-wrapper 
>
> Target: arm-linux-gnueabi
> Configured with: /tmp/build-crosstools-xh/gcc/gcc-9.3.0/configure 
> --target=arm-linux-gnueabi --enable-targets=all 
> --prefix=/tmp/build-crosstools-xh/cross --enable-languages=c 
> --without-headers --disable-bootstrap --disable-nls --disable-threads 
> --disable-shared --disable-libmudflap --disable-libssp 
> --disable-libgomp --disable-decimal-float --disable-libquadmath 
> --disable-libatomic --disable-libcc1 --disable-libmpx 
> --enable-checking=release
> Thread model: single
> gcc version 9.3.0 (GCC)
>
> Best Regards,
> Rong Chen
>

There is a 3-party cross compiler can reproduce it:

http://cdn.kernel.org/pub/tools/crosstool/files/bin/x86_64/10.1.0/x86_64-gcc-10.1.0-nolibc-arm-linux-gnueabi.tar.xz

$ 
/home/nfs/0day/gcc-10.1.0-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc 
-v
Using built-in specs.
COLLECT_GCC=/home/nfs/0day/gcc-10.1.0-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/home/nfs/0day/gcc-10.1.0-nolibc/arm-linux-gnueabi/bin/../libexec/gcc/arm-linux-gnueabi/10.1.0/lto-wrapper
Target: arm-linux-gnueabi
Configured with: /home/arnd/git/gcc/configure --target=arm-linux-gnueabi 
--enable-targets=all 
--prefix=/home/arnd/cross/x86_64/gcc-10.1.0-nolibc/arm-linux-gnueabi 
--enable-languages=c --without-headers --disable-bootstrap --disable-nls 
--disable-threads --disable-shared --disable-libmudflap --disable-libssp 
--disable-libgomp --disable-decimal-float --disable-libquadmath 
--disable-libatomic --disable-libcc1 --disable-libmpx 
--enable-checking=release
Thread model: single
Supported LTO compression algorithms: zlib
gcc version 10.1.0 (GCC)


I reproduce with the below command and the config file is attached.

$ make 
CROSS_COMPILE=/home/nfs/0day/gcc-10.1.0-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi- 
--jobs=16 ARCH=arm vmlinux
   CALL    scripts/atomic/check-atomics.sh
   CALL    scripts/checksyscalls.sh
   CHK     include/generated/compile.h
   CC      net/can/af_can.o
In file included from <command-line>:
net/can/af_can.c: In function 'can_init':
././include/linux/compiler_types.h:315:38: error: call to 
'__compiletime_assert_511' declared with attribute error: BUILD_BUG_ON 
failed: offsetof(struct can_frame, len) != offsetof(struct canfd_frame, 
len) || offsetof(struct can_frame, data) != offsetof(struct canfd_frame, 
data)
   315 |  _compiletime_assert(condition, msg, __compiletime_assert_, 
__COUNTER__)
       |                                      ^
././include/linux/compiler_types.h:296:4: note: in definition of macro 
'__compiletime_assert'
   296 |    prefix ## suffix();    \
       |    ^~~~~~
././include/linux/compiler_types.h:315:2: note: in expansion of macro 
'_compiletime_assert'
   315 |  _compiletime_assert(condition, msg, __compiletime_assert_, 
__COUNTER__)
       |  ^~~~~~~~~~~~~~~~~~~
./include/linux/build_bug.h:39:37: note: in expansion of macro 
'compiletime_assert'
    39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), 
msg)
       |                                     ^~~~~~~~~~~~~~~~~~
./include/linux/build_bug.h:50:2: note: in expansion of macro 
'BUILD_BUG_ON_MSG'
    50 |  BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
       |  ^~~~~~~~~~~~~~~~
net/can/af_can.c:891:2: note: in expansion of macro 'BUILD_BUG_ON'
   891 |  BUILD_BUG_ON(offsetof(struct can_frame, len) !=
       |  ^~~~~~~~~~~~
make[2]: *** [scripts/Makefile.build:283: net/can/af_can.o] Error 1
make[1]: *** [scripts/Makefile.build:500: net/can] Error 2
make: *** [Makefile:1799: net] Error 2
make: *** Waiting for unfinished jobs....

Best Regards,
Rong Chen

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