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Wed, 21 Feb 2024 21:16:26 -0800 (PST) Received: from google.com ([2401:fa00:8f:203:480:9ded:eece:6cb3]) by smtp.gmail.com with ESMTPSA id k6-20020a635a46000000b005db034d1514sm9383494pgm.82.2024.02.21.21.16.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Feb 2024 21:16:25 -0800 (PST) Date: Thu, 22 Feb 2024 14:16:21 +0900 From: Sergey Senozhatsky To: Masahiro Yamada Cc: Sergey Senozhatsky , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCHv2] kconfig: add some Kconfig env variables to make help Message-ID: <20240222051621.GH11472@google.com> References: <20240222031801.GG11472@google.com> <20240222032559.496127-1-senozhatsky@chromium.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On (24/02/22 13:57), Masahiro Yamada wrote: > On Thu, Feb 22, 2024 at 12:26 PM Sergey Senozhatsky > wrote: > > > > Add a new section "Configuration environment variables" to > > `make help` output in order to make it easier for people to > > discover KCONFIG_WERROR, etc. > > > > Signed-off-by: Sergey Senozhatsky > > --- > > scripts/kconfig/Makefile | 4 ++++ > > 1 file changed, 4 insertions(+) > > > > diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile > > index ea1bf3b3dbde..0044d49e149c 100644 > > --- a/scripts/kconfig/Makefile > > +++ b/scripts/kconfig/Makefile > > @@ -158,6 +158,10 @@ help: > > if help=$$(grep -m1 '^# Help: ' $(f)); then \ > > printf ' %-25s - %s\n' '$(notdir $(f))' "$${help#*: }"; \ > > fi;) > > + @echo '' > > + @echo 'Configuration environment variables:' > > + @echo ' KCONFIG_WERROR - Turn some Kconfig warnings into error conditions' > > + @echo ' KCONFIG_WARN_UNKNOWN_SYMBOLS - Make Kconfig warn about all unrecognized config symbols' > > > > # =========================================================================== > > # object files used by all kconfig flavours > > -- > > 2.44.0.rc0.258.g7320e95886-goog > > > > > > Why only two, while Kconfig supports more env variables? Right. I wanted to add only those that we use (and familiar with) for starters. I'm not familiar with things like KCONFIG_PROBABILITY, for instance, and not sure how to document it (its Documentation/kbuild/kconfig.rst description is pretty lengthy).