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

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Date:   Tue, 18 Oct 2016 15:54:59 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     linux-kbuild@...r.kernel.org, Michal Marek <mmarek@...e.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Difficulties around "fixdep" for the usage of a kernel build output
 directory

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.

Regards,
Markus