linux-kernel - [PATCH bpf] samples: bpf: fix build error due to -isystem removal

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Message-Id: <20211115130741.3584-1-alexandr.lobakin@intel.com>
Date:   Mon, 15 Nov 2021 14:07:41 +0100
From:   Alexander Lobakin <alexandr.lobakin@...el.com>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Cc:     Alexander Lobakin <alexandr.lobakin@...el.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Ard Biesheuvel <ardb@...nel.org>, netdev@...r.kernel.org,
        bpf@...r.kernel.org, linux-kbuild@...r.kernel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: [PATCH bpf] samples: bpf: fix build error due to -isystem removal

Since recent Kbuild updates we no longer include files from compiler
directories. However, samples/bpf/hbm_kern.h hasn't been tuned for
this (LLVM 13):

  CLANG-bpf  samples/bpf/hbm_out_kern.o
In file included from samples/bpf/hbm_out_kern.c:55:
samples/bpf/hbm_kern.h:12:10: fatal error: 'stddef.h' file not found
         ^~~~~~~~~~
1 error generated.
  CLANG-bpf  samples/bpf/hbm_edt_kern.o
In file included from samples/bpf/hbm_edt_kern.c:53:
samples/bpf/hbm_kern.h:12:10: fatal error: 'stddef.h' file not found
         ^~~~~~~~~~
1 error generated.

It is enough to just drop both stdbool.h and stddef.h from includes
to fix those.

Fixes: 04e85bbf71c9 ("isystem: delete global -isystem compile option")
Signed-off-by: Alexander Lobakin <alexandr.lobakin@...el.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
---
 samples/bpf/hbm_kern.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/samples/bpf/hbm_kern.h b/samples/bpf/hbm_kern.h
index 722b3fadb467..1752a46a2b05 100644
--- a/samples/bpf/hbm_kern.h
+++ b/samples/bpf/hbm_kern.h
@@ -9,8 +9,6 @@
  * Include file for sample Host Bandwidth Manager (HBM) BPF programs
  */
 #define KBUILD_MODNAME "foo"
-#include <stddef.h>
-#include <stdbool.h>
 #include <uapi/linux/bpf.h>
 #include <uapi/linux/if_ether.h>
 #include <uapi/linux/if_packet.h>
-- 
2.33.1