Re: [PATCH v2] Makefile: add a DEVOPTS flag to get pedantic compilation

[Junio C Hamano <gitster@pobox.com>]

Beat Bolli <dev+git@drbeat.li> writes:

> In the interest of code hygiene, make it easier to compile Git with the
> flag -pedantic.
>
> Pure pedantic compilation with GCC 7.3 results in one warning per use of
> the translation macro `N_`:
>
>     warning: array initialized from parenthesized string constant [-Wpedantic]
>
> Therefore also disable the parenthesising of i18n strings with
> -DUSE_PARENS_AROUND_GETTEXT_N=no.
>
> Signed-off-by: Beat Bolli <dev+git@drbeat.li>
> ---
>
> This is the convenience knob for all developers that led to the series
> bb/pedantic[1]. It does not depend on this series, though.

Yup, but "make DEVELOPER=Yes" build won't pass unless this patch is
queued after those clean-up ;-)

Remind me if I forget to tweak =no back to =0 before pushing the
result out.

Thanks.

> [1] https://public-inbox.org/git/20180708144342.11922-1-dev+git@drbeat.li/T/#u
>
>  Makefile       | 6 ++++++
>  config.mak.dev | 5 +++++
>  2 files changed, 11 insertions(+)
>
> diff --git a/Makefile b/Makefile
> index 0cb6590f24..2bfc051652 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -484,6 +484,12 @@ all::
>  #        The DEVELOPER mode enables -Wextra with a few exceptions. By
>  #        setting this flag the exceptions are removed, and all of
>  #        -Wextra is used.
> +#
> +#    pedantic:
> +#
> +#        Enable -pedantic compilation. This also disables
> +#        USE_PARENS_AROUND_GETTEXT_N to produce only relevant warnings.
>  
>  GIT-VERSION-FILE: FORCE
>  	@$(SHELL_PATH) ./GIT-VERSION-GEN
> diff --git a/config.mak.dev b/config.mak.dev
> index 2d244ca470..e11dd94741 100644
> --- a/config.mak.dev
> +++ b/config.mak.dev
> @@ -1,6 +1,11 @@
>  ifeq ($(filter no-error,$(DEVOPTS)),)
>  CFLAGS += -Werror
>  endif
> +ifneq ($(filter pedantic,$(DEVOPTS)),)
> +CFLAGS += -pedantic
> +# don't warn for each N_ use
> +CFLAGS += -DUSE_PARENS_AROUND_GETTEXT_N=no
> +endif
>  CFLAGS += -Wdeclaration-after-statement
>  CFLAGS += -Wno-format-zero-length
>  CFLAGS += -Wold-style-definition