linux-kernel - Re: Difficulties around "fixdep" for the usage of a kernel build output directory

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Date:   Tue, 18 Oct 2016 08:12:55 -0700
From:   Jim Davis <jim.epost@...il.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     linux-kbuild@...r.kernel.org, Michal Marek <mmarek@...e.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Difficulties around "fixdep" for the usage of a kernel build
 output directory

On Tue, Oct 18, 2016 at 6:54 AM, SF Markus Elfring
<elfring@...rs.sourceforge.net> wrote:
> Hello,
>
> The file "README" contains a section "BUILD directory for the kernel".
> I would like to use the functionality which is described there.
>
> One of my commands for such a build try is working as desired.
>
>
> elfring@...ne:~/Projekte/Linux/next-patched> git checkout next-20161014 && my_off=-O0 && for X in off; do my_output_dir=${my_build_dir}unchanged/optimisation/${X} && my_var="my_${X}" && my_parameters="-Wall -std=gnu89 -fomit-frame-pointer ${!my_var}" && make O="${my_output_dir}" HOSTCC='/usr/bin/gcc-6' HOSTCFLAGS="${my_parameters}" allmodconfig; done
> …
> #
> # configuration written to .config
> #
>
>
> I stumble on the following messages for another build command.
>
>
> elfring@...ne:~/Projekte/Linux/next-patched> my_off=-O0 && for X in off; do my_output_dir=${my_build_dir}unchanged/optimisation/${X} && my_var="my_${X}" && my_parameters="-Wall -std=gnu89 -fomit-frame-pointer ${!my_var}" && LANG=C make V=2 O="${my_output_dir}" HOSTCC='/usr/bin/gcc-6' HOSTCFLAGS="-S ${my_parameters}" drivers/md/; done
> make[1]: Entering directory …
>   HOSTCC  scripts/basic/fixdep - due to command line change
> scripts/basic/fixdep: line 1: .file: command not found
> scripts/basic/fixdep: line 2: .comm: command not found
> …
> scripts/basic/fixdep: line 6: .section: command not found
> scripts/basic/fixdep: line 7: .align: command not found
> scripts/basic/fixdep: line 8: .LC0:: command not found
> scripts/basic/fixdep: line 9: .string: command not found
> …
>
>
> I wonder why this approach does not work so far.
> I would appreciate your advices.

That's a very complicated command line.  Does something basic, like

make O=/tmp/$$ allmodconfig
make O=/tmp/$$

work for you?

-- 
Jim