linux-kernel - Re: [PATCH] kbuild: correct size calculation of bzImgae / fix x86 boot

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Date:	Mon, 21 Dec 2009 14:50:06 +0100
From:	Andreas Schwab <schwab@...ux-m68k.org>
To:	Michal Marek <mmarek@...e.cz>
Cc:	Michael Tokarev <mjt@....msk.ru>, Sam Ravnborg <sam@...nborg.org>,
	Michael Guntsche <mike@...loops.com>,
	Oliver Hartkopp <oliver@...tkopp.net>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kbuild: correct size calculation of bzImgae / fix x86 boot

Michal Marek <mmarek@...e.cz> writes:

> Andreas Schwab napsal(a):
>> Does dash's printf support %b?  Then this should work.
>
> Good idea. %b is specified by posix, so there is hope :).

Actually you don't need it anyway.  (Still untested though.)

Andreas.

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index cd815ac..7173c0c 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -213,14 +213,16 @@ cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -f -9 > $@) || \
 
 # Bzip2 and LZMA do not include size in file... so we have to fake that;
 # append the size as a 32-bit littleendian number as gzip does.
-size_append = printf $(shell						\
+size_append = printf $$(						\
 dec_size=0;								\
 for F in $1; do								\
 	fsize=$$(stat -c "%s" $$F);					\
 	dec_size=$$(expr $$dec_size + $$fsize);				\
 done;									\
-printf "%08x" $$dec_size |						\
-	sed 's/\(..\)\(..\)\(..\)\(..\)/\\\\x\4\\\\x\3\\\\x\2\\\\x\1/g'	\
+for i in 1 2 3 4; do							\
+	printf '\\%03o' $$(expr $$dec_size % 256);			\
+  	dec_size=$$(expr $$dec_size / 256);				\
+done									\
 )
 
 quiet_cmd_bzip2 = BZIP2   $@

-- 
Andreas Schwab, schwab@...ux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."
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