linux-kernel - Re: selftests: connector: proc_filter.c:48:20: error: invalid application of 'sizeof' to an incomplete type 'struct proc

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Message-ID: <20230727194311.6a51f285@kernel.org>
Date:   Thu, 27 Jul 2023 19:43:11 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Anjali Kulkarni <anjali.k.kulkarni@...cle.com>
Cc:     Shuah Khan <skhan@...uxfoundation.org>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "lkft-triage@...ts.linaro.org" <lkft-triage@...ts.linaro.org>,
        Netdev <netdev@...r.kernel.org>,
        clang-built-linux <llvm@...ts.linux.dev>,
        Shuah Khan <shuah@...nel.org>,
        Anders Roxell <anders.roxell@...aro.org>,
        "David S. Miller" <davem@...emloft.net>,
        Liam Howlett <liam.howlett@...cle.com>
Subject: Re: selftests: connector: proc_filter.c:48:20: error: invalid
 application of 'sizeof' to an incomplete type 'struct proc_input'

On Fri, 28 Jul 2023 01:38:40 +0000 Anjali Kulkarni wrote:
> Jakub,
> Do I need to revert the -f runtime filter option back to compile time
> and commit with that disabled so the selftest compiles on a kernel on
> which the new options are not defined?

I'm not 100% sure myself on what's the expectations for building
selftests against uAPI headers is..

I _think_ that you're supposed to add an -I$something to
the CFLAGS in your Makefile. KHDR_INCLUDES maybe? So that the uAPI
headers from the build get used (rendered by make headers).

Take a look at Documentation/dev-tools/kselftest.rst, I hope
the answer is somewhere there.