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From: Riku Voipio <riku.voipio@linaro.org>
Date: Thu, 29 Mar 2018 10:36:25 +0300
Message-ID: <CAAqcGHnBZnpexospouTdfOq4NNYg4kDDirKg6+HbYsQrKeUf6Q@mail.gmail.com>
Subject: Re: [PATCH v4] scripts/package/builddeb: split generating packaging
 and build
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Sender: linux-kbuild-owner@vger.kernel.org
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To: Ben Hutchings <ben@decadent.org.uk>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>, Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>, debian-kernel <debian-kernel@lists.debian.org>

On 29 March 2018 at 03:20, Ben Hutchings <ben@decadent.org.uk> wrote:
> On Wed, 2018-03-28 at 11:58 +0300, Riku Voipio wrote:
> [...]
>> One option:
>>
>> +++ b/scripts/package/mkdebian
>> cat <<EOF > debian/rules
>> -#!/usr/bin/make -f
>> #!$(which $MAKE)  -f
> [..]
>
> Shebang lines are interpreted by the kernel, not by a shell.  So you
> can't do anything clever like that.

Look more closely ;) Shell expands the variables into the herefile. So
if make is picked from a nonstandard location, the debian/rules
shebang becomes #!/home/masahiro/bin/make -f

As I said the price of this hack is that if use make from non-standard
location, the source package won't build anywhere else. Then again,
you probably shouldn't use non-standard tools when building source
packages for others to consume.

Riku