linux-kernel - Re: [PATCH v4 07/31] kconfig: add built-in function support

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Message-ID: <CAFkk2KQuPiy=ziKeixNHzu-_k+Mau6PUwYTQh_EbWEu0GX-tkg@mail.gmail.com>
Date:   Mon, 21 May 2018 16:32:57 +0200
From:   Ulf Magnusson <ulfalizer@...il.com>
To:     Sam Ravnborg <sam@...nborg.org>
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        "Luis R . Rodriguez" <mcgrof@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Nicholas Piggin <npiggin@...il.com>,
        Kees Cook <keescook@...omium.org>,
        Emese Revfy <re.emese@...il.com>, X86 ML <x86@...nel.org>
Subject: Re: [PATCH v4 07/31] kconfig: add built-in function support

On Mon, May 21, 2018 at 4:23 PM, Ulf Magnusson <ulfalizer@...il.com> wrote:
> On Sun, May 20, 2018 at 4:50 PM, Sam Ravnborg <sam@...nborg.org> wrote:
>> Will the following be equal:
>>
>>         $(foo,abc,$(x),$(y))
>>         $(foo, abc, $(x), $(y))
>>
>> make is rather annoying as space is significant, but there seems no good reason
>> for kconfig to inheritate this.
>> So unless there are good arguments consider alloing the spaces.
>> If the current implmentation already supports optional spaces then I just missed
>> it whie reviewing.
>>
>>         Sam
>
> +1 from me.
>
> I also find the rules for whitespace in Make confusing, and always
> have to look them up when doing trickier stuff. Maybe they're the
> result of people not considering whitespace initially, and stuff
> getting tacked on later. GNU Make adds some alternate syntaxes with
> quotes.
>
> I was going to mention shell, but it looks like you already did. :)
>
> If we go with Make-like syntax, maybe we could at least have a variant
> with fewer whitespace gotchas.
>
> Cheers,
> Ulf

Maybe it'd be a pain to implement, but something like $(foo $(x) "two
words" "interpolated $(stuff)") seems pretty nice, with three
arguments there.

For variables too:

  x = foo
  y = "two words"

Or have mandatory quotes, but yeah, bit spammy there maybe.

Cheers,
Ulf