[U-Boot] [PATCH v3 2/8] riscv: Enable function sections

[rick at andestech.com]

> -----Original Message-----
> From: Alexander Graf [mailto:agraf at suse.de]
> Sent: Monday, April 23, 2018 2:00 PM
> To: u-boot at lists.denx.de
> Cc: Rick Jian-Zhi Chen(陳建志); Greentime Hu; Philipp Tomsich; Heinrich
> Schuchardt; schwab at suse.de
> Subject: [PATCH v3 2/8] riscv: Enable function sections
>
> The linker can remove sections that are never addressed, so it makes a lot of
> sense to declare every function as an individual section.
>
> This reduces the output U-Boot code size by ~30kb for me.
>
> Signed-off-by: Alexander Graf <agraf at suse.de>
> ---
>  arch/riscv/config.mk | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/riscv/config.mk b/arch/riscv/config.mk index
> 6b681c4286..69f4cf6ce8 100644
> --- a/arch/riscv/config.mk
> +++ b/arch/riscv/config.mk
> @@ -29,5 +29,5 @@ CONFIG_STANDALONE_LOAD_ADDR = 0x00000000 \
>                             -T $(srctree)/examples/standalone/riscv.lds
>
>  PLATFORM_CPPFLAGS    += -ffixed-gp -fpic
> -PLATFORM_RELFLAGS += -fno-strict-aliasing -fno-common -gdwarf-2
> +PLATFORM_RELFLAGS += -fno-strict-aliasing -fno-common -gdwarf-2
> +-ffunction-sections

Reviewed-by: Rick Chen <rick at andestech.com>

>  LDFLAGS_u-boot += --gc-sections -static -pie
> --
> 2.12.3

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