linux-kernel - Re: Challenges around the usage of different "HOSTCFLAGS" for kernel build configuration and module generation

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Message-ID: <2ff4dbf5-f9e5-9aa1-a93a-2e2bd81b43f7@users.sourceforge.net>
Date:   Thu, 20 Oct 2016 08:33:00 +0200
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     Jim Davis <jim.epost@...il.com>
Cc:     linux-kbuild@...r.kernel.org, Michal Marek <mmarek@...e.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: Challenges around the usage of different "HOSTCFLAGS" for kernel
 build configuration and module generation

> make defconfig; make EXTRA_CFLAGS="-g" drivers/md/; objdump -S drivers/md/whatever.o

Such a command looks promising.

* I find it safer when double ampersand will be used as control operator
  instead of semicolon there.

* I get the impression from an other command like "find . -name '?akefile' -exec ack --with-filename EXTRA_CFLAGS '{}' \;"
  that the suggested parameter "EXTRA_CFLAGS" will not achieve an effect
  at places where I am interested in at the moment.

It seems that further fine-tuning can become interesting and challenging
for involved make variables.

Regards,
Markus