linux-kernel - Re: [PATCH] bpfilter: remove extra header search paths for bpfilter

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Date:   Fri, 22 Feb 2019 00:54:47 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Networking <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] bpfilter: remove extra header search paths for bpfilter_umh

On Thu, Feb 21, 2019 at 11:46 PM Guenter Roeck <linux@...ck-us.net> wrote:
>
> On Thu, Jan 31, 2019 at 12:15:35PM +0900, Masahiro Yamada wrote:
> > Currently, the header search paths -Itools/include and
> > -Itools/include/uapi are not used. Let's drop the unused code.
> >
> > We can remove -I. too by fixing up one C file.
> >
>
> This patch reintroduces the problem last fixed with commit ae40832e53c3
> ("bpfilter: fix a build err"). Seen (at least) with gcc 7.4.0, 8.2.0.
> binutils version is 2.31.1. Reverting this patch fixes the problem.


Hmm. I cannot reproduce the build error with my gcc,
but you are right.


I'd like to get back only
'KBUILD_HOSTCFLAGS += -Itools/include/ -Itools/include/uapi'
instead of the full revert.

If David is fine with it, I can send a patch with filling commit log.



Thanks.



> Guenter
>
> > Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> > Signed-off-by: David S. Miller <davem@...emloft.net>
> > ---
> >  net/bpfilter/Makefile | 1 -
> >  net/bpfilter/main.c   | 2 +-
> >  2 files changed, 1 insertion(+), 2 deletions(-)
> >
> > diff --git a/net/bpfilter/Makefile b/net/bpfilter/Makefile
> > index 0947ee7f70d5..5d6c7760142d 100644
> > --- a/net/bpfilter/Makefile
> > +++ b/net/bpfilter/Makefile
> > @@ -5,7 +5,6 @@
> >
> >  hostprogs-y := bpfilter_umh
> >  bpfilter_umh-objs := main.o
> > -KBUILD_HOSTCFLAGS += -I. -Itools/include/ -Itools/include/uapi
> >  HOSTCC := $(CC)
> >
> >  ifeq ($(CONFIG_BPFILTER_UMH), y)
> > diff --git a/net/bpfilter/main.c b/net/bpfilter/main.c
> > index 1317f108df8a..61ce8454a88e 100644
> > --- a/net/bpfilter/main.c
> > +++ b/net/bpfilter/main.c
> > @@ -6,7 +6,7 @@
> >  #include <sys/socket.h>
> >  #include <fcntl.h>
> >  #include <unistd.h>
> > -#include "include/uapi/linux/bpf.h"
> > +#include "../../include/uapi/linux/bpf.h"
> >  #include <asm/unistd.h>
> >  #include "msgfmt.h"
> >
> > --
> > 2.7.4



--
Best Regards

Masahiro Yamada