On Sun, Feb 16, 2020 at 7:20 AM Masahiro Yamada <masahiroy@xxxxxxxxxx> wrote:
>
> This CONFIG option was added by commit 35bb5b1e0e84 ("Add option to
> enable -Wframe-larger-than= on gcc 4.4"). At that time, the cc-option
> check was needed.
Indeed, the oldest version of GCC 4.4 on godbolt.org; GCC 4.4.7 supports it.
Reviewed-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
>
> According to Documentation/process/changes.rst, the current minimal
> supported version of GCC is 4.6, so you can assume GCC supports it.
> Clang supports it as well.
>
> Remove the cc-option switch and redundant comments.
>
> Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
> ---
>
> Makefile | 2 +-
> lib/Kconfig.debug | 3 +--
> 2 files changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index 84b71845c43f..8f15926b83bb 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -728,7 +728,7 @@ KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
> endif
>
> ifneq ($(CONFIG_FRAME_WARN),0)
> -KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
> +KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
> endif
>
> stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index 69def4a9df00..fb6b93ffdf77 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -266,7 +266,7 @@ config ENABLE_MUST_CHECK
> attribute warn_unused_result" messages.
>
> config FRAME_WARN
> - int "Warn for stack frames larger than (needs gcc 4.4)"
> + int "Warn for stack frames larger than"
> range 0 8192
> default 2048 if GCC_PLUGIN_LATENT_ENTROPY
> default 1280 if (!64BIT && PARISC)
> @@ -276,7 +276,6 @@ config FRAME_WARN
> Tell gcc to warn at build time for stack frames larger than this.
> Setting this too low will cause a lot of warnings.
> Setting it to 0 disables the warning.
> - Requires gcc 4.4
>
> config STRIP_ASM_SYMS
> bool "Strip assembler-generated symbols during link"
> --
> 2.17.1
>
--
Thanks,
~Nick Desaulniers
