Re: [PATCH RFC 1/1] kbuild: enable overriding the compiler using the environment

[Mark Brown <broonie@kernel.org>]

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On Tue, Aug 13, 2019 at 01:37:14AM +0900, Masahiro Yamada wrote:
> On Fri, Aug 9, 2019 at 2:15 PM Nathan Chancellor

> > This is problematic because there is no way for CC, HOSTCC, and HOSTCXX
> > to be passed to make within scripts/kconfig/merge_config.sh.

> Is it so problematic?

> If you start from make, CC=clang and HOSTCC=clang are propagated to sub-make
> even via shell scripts such as merge_config.sh

> Only the problem I see is the situation where
> a user directly runs scripts/kconfig/merge_config.sh
> without using make as a start-point.

This is really a very common thing for testing infrastructure to do,
it'll combine a base defconfig with a fragment enabling extra stuff
either to directly cover that extra stuff or to ensure that
configuration options needed for testsuites get turned on.  

> A user can wrap merge_config.sh with a simple Makefile
> if they want to override CC, HOSTCC, etc.

If we want to do that it seems sensible to provide that Makefile
upstream so there's a standard thing, it might also help people notice
that they need to do this and avoid getting surprised.

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