[PATCH] Makefile: use shell to calculate map_size

["Leon M. Busch-George" <leon@georgemail.de>]

From: "Leon M. Busch-George" <leon@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@georgemail.eu>
---
 Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 7a3209bd9e..41dc4baad2 100644
--- a/Makefile
+++ b/Makefile
@@ -1275,9 +1275,9 @@ 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 = $$1} END {if (start != "" && end != "") print "ibase=16; " toupper(end) " - " toupper(start)}' \
+		awk '/_image_copy_start/ {start = $$1} /_image_binary_end/ {end = $$1} END {if (start != "" && end != "") print "echo $$((0x" toupper(end) " - 0x" toupper(start) "))"}' \
 		| sed 's/0X//g' \
-		| bc); \
+		| sh); \
 	if [ "" != "$$map_size" ]; then \
 		if test $$map_size -ne $$file_size; then \
 			echo "u-boot.map shows a binary size of $$map_size" >&2 ; \
-- 
2.44.0