lkml.org 
[lkml]   [2014]   [Jul]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2] kbuild, LLVMLinux: Supress warnings unless W=1-3
Dne 31.7.2014 06:16, behanw@converseincode.com napsal(a):
> From: Behan Webster <behanw@converseincode.com>
>
> clang has more warnings enabled by default. Turn them off unless W is set.
> This patch fixes a logic bug where warnings in clang were disabled when W was set.
>
> Signed-off-by: Behan Webster <behanw@converseincode.com>
> Signed-off-by: Jan-Simon Möller <dl9pf@gmx.de>
> Signed-off-by: Mark Charlebois <charlebm@gmail.com>
> Cc: mmarek@suse.cz
> Cc: bp@alien8.de
> ---
> Makefile | 1 +
> scripts/Makefile.extrawarn | 22 ++++++++++++----------
> 2 files changed, 13 insertions(+), 10 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index f6a7794..f343e17 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -668,6 +668,7 @@ KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
> # source of a reference will be _MergedGlobals and not on of the whitelisted names.
> # See modpost pattern 2
> KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
> +KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
> else
>
> # This warning generated too much noise in a regular build.
> diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
> index 6564350..b5b0751 100644
> --- a/scripts/Makefile.extrawarn
> +++ b/scripts/Makefile.extrawarn
> @@ -26,16 +26,6 @@ warning-1 += $(call cc-option, -Wmissing-include-dirs)
> warning-1 += $(call cc-option, -Wunused-but-set-variable)
> warning-1 += $(call cc-disable-warning, missing-field-initializers)
>
> -# Clang
> -warning-1 += $(call cc-disable-warning, initializer-overrides)
> -warning-1 += $(call cc-disable-warning, unused-value)
> -warning-1 += $(call cc-disable-warning, format)
> -warning-1 += $(call cc-disable-warning, unknown-warning-option)
> -warning-1 += $(call cc-disable-warning, sign-compare)
> -warning-1 += $(call cc-disable-warning, format-zero-length)
> -warning-1 += $(call cc-disable-warning, uninitialized)
> -warning-1 += $(call cc-option, -fcatch-undefined-behavior)
> -

OK.


> warning-2 := -Waggregate-return
> warning-2 += -Wcast-align
> warning-2 += -Wdisabled-optimization
> @@ -55,6 +45,18 @@ warning-3 += -Wswitch-default
> warning-3 += $(call cc-option, -Wpacked-bitfield-compat)
> warning-3 += $(call cc-option, -Wvla)
>
> +ifeq ($(COMPILER),clang)
> +ifndef $(W)
> +KBUILD_CFLAGS += $(call cc-disable-warning, initializer-overrides)
> +KBUILD_CFLAGS += $(call cc-disable-warning, unused-value)
> +KBUILD_CFLAGS += $(call cc-disable-warning, format)
> +KBUILD_CFLAGS += $(call cc-disable-warning, unknown-warning-option)
> +KBUILD_CFLAGS += $(call cc-disable-warning, sign-compare)
> +KBUILD_CFLAGS += $(call cc-disable-warning, format-zero-length)
> +KBUILD_CFLAGS += $(call cc-disable-warning, uninitialized)
> +endif
> +endif
> +

Please remove this part, it has no effect. I assume that if it works for
you, these warning are not as annoying so they do not need to be disabled?

Thanks,
Michal
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2014-07-31 11:01    [W:0.085 / U:1.260 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site