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SubjectRe: Why use /bin/sh in kernel build system?
On Tue, Apr 29, 2008 at 03:27:02PM -0500, Mark Rustad wrote:
> On Apr 29, 2008, at 11:45 AM, Sam Ravnborg wrote:
>
>>> I read in the latest Linux Journal magazine that someone noticed that
>>> even
>>> though the kernel scripts say #!/bin/sh, many of them are really bash
>>> scripts.
>>> This person went through the effort of changing the script to be true
>>> 'sh'
>>> scripts. Has that code been merged in?
>>
>> I have no patches pending but I may have lost them.
>> As I am 100% ignorant about what is bash and what is not bash specialities
>> I will more or less be blind when I apply them so I hope they are well
>> tested.
>
>
> So why use /bin/sh ever in the kernel build system? I consciously began
> using /bin/bash consistently in scripts years ago because you just never
> know what you get when you use /bin/sh. I remember replacing /bin/sh with
> /bin/bash in gcc's build system to get it to work on some system at some
> point. Life is too short to keep having to fight silliness like this and I
> can't see a valid reason why a system building a Linux kernel, or for that
> matter gcc, should not have the bash shell installed on it.

Think harder.

> And on some systems, changing /bin/sh to point to /bin/bash can result in
> subtle problems with that system's environment, so that is not a good
> option. At least by using /bin/bash you know what you get and the
> dependency is then known to all.



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