netdev - Re: [PATCH V2 06/10] selftests: landlock: Add the uapi headers include variable

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Date:   Thu, 20 Jan 2022 19:20:38 +0100
From:   Mickaël Salaün <mic@...ikod.net>
To:     Muhammad Usama Anjum <usama.anjum@...labora.com>,
        Shuah Khan <shuah@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Darren Hart <dvhart@...radead.org>,
        Davidlohr Bueso <dave@...olabs.net>,
        André Almeida <andrealmeid@...labora.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Mat Martineau <mathew.j.martineau@...ux.intel.com>,
        Matthieu Baerts <matthieu.baerts@...sares.net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        chiminghao <chi.minghao@....com.cn>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:KERNEL VIRTUAL MACHINE (KVM)" <kvm@...r.kernel.org>,
        "open list:LANDLOCK SECURITY MODULE" 
        <linux-security-module@...r.kernel.org>,
        "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>,
        "open list:NETWORKING [MPTCP]" <mptcp@...ts.linux.dev>,
        "open list:MEMORY MANAGEMENT" <linux-mm@...ck.org>
Cc:     kernel@...labora.com
Subject: Re: [PATCH V2 06/10] selftests: landlock: Add the uapi headers
 include variable


On 19/01/2022 11:15, Muhammad Usama Anjum wrote:
> Out of tree build of this test fails if relative path of the output
> directory is specified. Add the KHDR_INCLUDES to correctly reach the
> headers.
> 
> Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
> ---
> Changes in V2:
>          Revert the excessive cleanup which was breaking the individual
> test build.
> ---
>   tools/testing/selftests/landlock/Makefile | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/landlock/Makefile b/tools/testing/selftests/landlock/Makefile
> index a99596ca9882..0b0049e133bb 100644
> --- a/tools/testing/selftests/landlock/Makefile
> +++ b/tools/testing/selftests/landlock/Makefile
> @@ -1,6 +1,6 @@
>   # SPDX-License-Identifier: GPL-2.0
>   
> -CFLAGS += -Wall -O2
> +CFLAGS += -Wall -O2 $(KHDR_INCLUDES)

Reviewed-by: Mickaël Salaün <mic@...ux.microsoft.com>

It works for me, but I'm wondering if a missing -I path could cause any 
issue (cf. -I$(khdr_dir) bellow in this file). My GCC and clang ignore 
such non-existent paths unless -Wmissing-include-dirs is used, which 
would print a warning on your CI, but I guess that's OK.

>   
>   src_test := $(wildcard *_test.c)
>