Re: [PATCH v3 net-next 0/2] bpfilter

On Wed, 23 May 2018 18:33:52 -0700, Jakub Kicinski wrote:

Minor glitch with Ubuntu 18.04:

$ gcc --version
gcc (Ubuntu 7.3.0-16ubuntu3) 7.3.0

In file included from /usr/include/fcntl.h:290:0,
                 from ../net/bpfilter/main.c:7:
In function ‘open’,
    inlined from ‘main’ at ../net/bpfilter/main.c:58:13:
/usr/include/x86_64-linux-gnu/bits/fcntl2.h:50:4: error: call to ‘__open_missing_mode’ declared with attribute error: open with O_CREAT or O_TMPFILE in second argument needs 3 arguments
    __open_missing_mode ();
    ^~~~~~~~~~~~~~~~~~~~~~
scripts/Makefile.host:107: recipe for target 'net/bpfilter/main.o' failed
make[3]: *** [net/bpfilter/main.o] Error 1

I can't repro on Fedora 27 gcc (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5),
perhaps the GCC is broken on that Ubuntu 18.04 box of mine.  The warning/
/error, however, looks potentially legit?

More?

Kernel: arch/x86/boot/bzImage is ready  (#9)
  Building modules, stage 2.
  MODPOST 1620 modules
ERROR: "bpfilter_process_sockopt" [net/bpfilter/bpfilter.ko] undefined!
../scripts/Makefile.modpost:92: recipe for target '__modpost' failed
make[2]: *** [__modpost] Error 1
/home/jkicinski/devel/linux/Makefile:1274: recipe for target 'modules' failed
make[1]: *** [modules] Error 2
make[1]: Leaving directory '/home/jkicinski/devel/linux/build_randconfig'
Makefile:146: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2