[U-Boot] [PATCH] Avoid using gawk-specific strtonum()

[Wolfgang Denk]

Dear Simon,

In message <1403071815-32055-1-git-send-email-sjg at chromium.org> you wrote:
> We need to subtract two hex numbers. Avoid using strtonum() by doing the
> subtraction in bc with a suitable input base.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>
> Reported-by: Vasili Galka <vvv444 at gmail.com>
> ---
> 
>  Makefile | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/Makefile b/Makefile
> index 24d9687..bb2f615 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -788,7 +788,8 @@ OBJCOPYFLAGS_u-boot.bin := -O binary
>  binary_size_check: u-boot.bin System.map FORCE
>  	@file_size=`stat -c %s u-boot.bin` ; \
>  	map_size=$(shell cat System.map | \
> -		awk '/_image_copy_start/ {start = $$1} /_image_binary_end/ {end = $$1} END {if (start != "" && end != "") print strtonum("0x" end) - strtonum("0x" start)}'); \
> +		awk '/_image_copy_start/ {start = $$1} /_image_binary_end/ {end = $$1} END {if (start != "" && end != "") print "ibase=16; " toupper(end) " - " toupper(start)}' \
> +		| bc); \

I think instead of introducing yet another tool dependency this could
be rewritten to use just bash:

	awk '/_image_copy_start/ {start = $1}
	     /_image_binary_end/ {end = $1}
	     END { if (start != "" && end != "")
	     	print "printf %d $$((0x" end " - 0x" start "))"
	     }' |
	bash

?



Best regards,

Wolfgang Denk

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