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Date:   Sat, 2 May 2020 20:16:21 +0200
From:   Marek Behun <marek.behun@nic.cz>
To:     Masahiro Yamada <masahiroy@kernel.org>
Cc:     DTML <devicetree@vger.kernel.org>,
        Pavel Modilaynen <pavel.modilaynen@axis.com>,
        Rob Herring <robh+dt@kernel.org>
Subject: Re: [PATCH] dtc: Use better check for libyaml
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On Sun, 3 May 2020 02:56:42 +0900
Masahiro Yamada <masahiroy@kernel.org> wrote:

> You missed to see the cost of parsing the Makefile.
> 
> 
> scripts/dtc/Makefile is parsed every time
> you run 'make'.
> 
> Even if you have nothing to recompile,
> it builds the tiny program in background.
> 
> This happens for 'make mrproper' too.

I missed this point by a large margin indeed.

> Maybe, file a bug report to your distribution
> if the pc file is strangely installed?
>
> ...

Very well, thank you for elaborating on that. Sorry this took your time.

Now that I know this, wouldn't it make more sense to decide
whether to build yamltree.c or not in config stage, eg. in a Kconfig
file? Because now it seems that pkg-config is being run everytime we run
make. I understand that it is much cheaper than gcc, but either way...

Marek