Tom Rini trini@ti.com writes:
On Wed, Jun 18, 2014 at 12:01:12PM +0200, Wolfgang Denk wrote:
Dear Simon,
In message 1403071815-32055-1-git-send-email-sjg@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@chromium.org Reported-by: Vasili Galka vvv444@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
But now we're forcing bash.
Arithmetic expansion including hex constants is POSIX shell: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag...