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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Wed, 21 Feb 2018 09:01:59 -0800
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Subject: Re: [PATCH 11/23] kconfig: add 'shell-stdout' function
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Ulf Magnusson <ulfalizer@gmail.com>,
	Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Arnd Bergmann <arnd@arndb.de>,
	Kees Cook <keescook@chromium.org>, Randy Dunlap <rdunlap@infradead.org>,
	Sam Ravnborg <sam@ravnborg.org>, Michal Marek <michal.lkml@markovi.net>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Tue, Feb 20, 2018 at 8:59 PM, Masahiro Yamada
<yamada.masahiro@socionext.com> wrote:
>
> IMO, I prefer to use different names for different purpose.
> So, 'stdout' and 'success' look good to me.
>
> BTW, I noticed just one built-in function is enough
> because 'success' can be derived from 'stdout'.
>
> So, my plan is, implement $(shell ...) as a built-in function.
> This returns the stdout from the command.
>
> Then, implement 'success' as a textual shorthand
> by using macro, like this:
>
> macro success $(shell ($(1) && echo y) || echo n)

I like it. This is nice and clean, and seems to be very generic. I see
no issues with this approach.

                Linus