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

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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.