[PATCH v2] Makefile: use shell to calculate map_size

[Leon Busch-George]

A colleague made me aware that the '[ -n "$$end" ]' is not necessary since 'read' already returns an exit code.

v3 inc

On Mon,  4 Mar 2024 21:38:56 +0100
"Leon M. Busch-George" <leon at georgemail.de> wrote:

> From: "Leon M. Busch-George" <leon at georgemail.eu>
> 
> The error message "bc: command not found" is easily missed since the
> build continues.
> bc is not a part of coreutils or base-devel. POSIX sh can also do the
> calculation.
> 
> Signed-off-by: Leon M. Busch-George <leon at georgemail.eu>
> ---
>  Makefile | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index a2bc9d5903..e8e794368e 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1275,10 +1275,15 @@ OBJCOPYFLAGS_u-boot-nodtb.bin := -O binary \
>  binary_size_check: u-boot-nodtb.bin FORCE
>  	@file_size=$(shell wc -c u-boot-nodtb.bin | awk '{print
> $$1}') ; \ map_size=$(shell cat u-boot.map | \
> -		awk '/_image_copy_start/ {start = $$1}
> /_image_binary_end/ {end = $$1} END {if (start != "" && end != "")
> print "ibase=16; " toupper(end) " - " toupper(start)}' \
> -		| sed 's/0X//g' \
> -		| bc); \
> -	if [ "" != "$$map_size" ]; then \
> +		awk ' \
> +			/_image_copy_start/ { start = $$1 } \
> +			/_image_binary_end/ { end = $$1 } \
> +			END { \
> +				if (start != "" && end != "") \
> +					print end " " start; \
> +			}' \
> +		| sh -c 'read end start; [ -n "$$end" ] && echo
> $$((end - start))'); \
> +	if [ -n "$$map_size" ]; then \
>  		if test $$map_size -ne $$file_size; then \
>  			echo "u-boot.map shows a binary size of
> $$map_size" >&2 ; \ echo "  but u-boot-nodtb.bin shows $$file_size"
> >&2 ; \