linux-kernel - Re: [PATCH v4 02/79] scripts/headers_compile_test.sh: compile test script for exported headers

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Message-ID: <20151015072933.GV6104@lakka.kapsi.fi>
Date:	Thu, 15 Oct 2015 10:29:33 +0300
From:	Mikko Rapeli <mikko.rapeli@....fi>
To:	Alexander Stein <alexander.stein@...tec-electronic.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 02/79] scripts/headers_compile_test.sh: compile test
 script for exported headers

On Thu, Oct 15, 2015 at 09:17:18AM +0200, Alexander Stein wrote:
> Hi Mikko,
> 
> On Thursday 15 October 2015 07:55:40, Mikko Rapeli wrote:
> > Users of kernel header files would be happier if they did not contain
> > kernel specific parts and would contain #include statements for all
> > other header files that they depend on, and in general would compile.
> > 
> > For each header file exported to userspace, this script creates
> > a simple .c file which just includes the header file. Then it
> > tries to compile it together with minimal header files from GCC
> > and libc, and reports results.
> 
> Just an idea: Why not try to create a pre-compiled header (pch) instead. So you can get rid of creating temporary .c files for each header.

Good idea. I'll explore this too. Currently the scripts abuse the
headers_install target directory and leave cruft like these .c files and
the hacked up libc headers around. I was planning to clean these up when
actual headers are clean of compiler errors and when integrating
this compile check to 'make headers_check'.

-Mikko
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