Subject: Re: [PATCH 2/3] Makefile: avoid multiple -Wall in CFLAGS

From: Junio C Hamano <[email-masked]>
Date: Tue, 28 Sep 2021 14:19:49 -0700

Carlo Marcelo Arenas Belón  <[email-masked]> writes:

> 6163f3f1a4 (config.mak.dev: add -Wall, primarily for -Wformat, to help
> autoconf users, 2018-10-12) adds a second -Wall in config.mak.dev to
> workaround the lack of one from config.mak.autogen.
>
> Since 6d5d4b4e93 (Makefile: allow for combining DEVELOPER=1 and
> CFLAGS="...", 2019-02-22), that variable is set instead as part of
> DEVELOPER_FLAGS which won't be overriden by config.mak.autogen, so
> it can be safely removed from config.mak.dev if set instead in the
> Makefile.

Hmph, don't this break non-developers, though?

They now do not get -Wall that they used to?  Or am I reading the
patch incorrectly?

Thanks.

> This also has the advantage of separating cleanly CFLAGS which are
> used for building with the ones that provide with diagnostics.
>
> Signed-off-by: Carlo Marcelo Arenas Belón <[email-masked]>
> ---
>  Makefile       | 3 ++-
>  config.mak.dev | 1 -
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index 9df565f27b..963b9e7c6b 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1200,7 +1200,8 @@ endif
>  # Set CFLAGS, LDFLAGS and other *FLAGS variables. These might be
>  # tweaked by config.* below as well as the command-line, both of
>  # which'll override these defaults.
> -CFLAGS = -g -O2 -Wall
> +CFLAGS = -g -O2
> +DEVELOPER_CFLAGS = -Wall
>  LDFLAGS =
>  CC_LD_DYNPATH = -Wl,-rpath,
>  BASIC_CFLAGS = -I.
> diff --git a/config.mak.dev b/config.mak.dev
> index c81be62a5c..90c47d2782 100644
> --- a/config.mak.dev
> +++ b/config.mak.dev
> @@ -6,7 +6,6 @@ ifeq ($(filter no-error,$(DEVOPTS)),)
>  DEVELOPER_CFLAGS += -Werror
>  SPARSE_FLAGS += -Wsparse-error
>  endif
> -DEVELOPER_CFLAGS += -Wall
>  ifeq ($(filter no-pedantic,$(DEVOPTS)),)
>  DEVELOPER_CFLAGS += -pedantic
>  ifneq ($(filter clang4 gcc5,$(COMPILER_FEATURES)),)