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kbuild: allow compressors (gzip, bzip2, lzma) to take multiple inputs 

Allow the compression commands in Kbuild (i.e. gzip, bzip2, lzma) to
take multiple input files and emit the concatenated compressed
output.  This avoids an intermediate step when a kernel image is built
from multiple components, such as the relocatable x86-32 kernel.

Sam Ravnborg integrated the bin_size script into the Makefile.

[ Impact: new build feature, not yet used ]

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
H. Peter Anvin 2009-05-05 21:17:15 -07:00
parent 0b4eb462da
commit d3dd3b5a29
2 changed files with 20 additions and 16 deletions
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24
scripts/Makefile.lib
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@ -183,20 +183,34 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
# ---------------------------------------------------------------------------
quiet_cmd_gzip = GZIP $@
cmd_gzip = gzip -f -9 < $< > $@
cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -f -9 > $@) || \
(rm -f $@ ; false)
# Bzip2
# ---------------------------------------------------------------------------
# Bzip2 does not include size in file... so we have to fake that
size_append=$(CONFIG_SHELL) $(srctree)/scripts/bin_size
# 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 = echo -ne $(shell \
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' \
)
quiet_cmd_bzip2 = BZIP2 $@
cmd_bzip2 = (bzip2 -9 < $< && $(size_append) $<) > $@ || (rm -f $@ ; false)
cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
(rm -f $@ ; false)
# Lzma
# ---------------------------------------------------------------------------
quiet_cmd_lzma = LZMA $@
cmd_lzma = (lzma -9 -c $< && $(size_append) $<) >$@ || (rm -f $@ ; false)
cmd_lzma = (cat $(filter-out FORCE,$^) | \
lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
(rm -f $@ ; false)

10
scripts/bin_size
View File

@ -1,10 +0,0 @@
#!/bin/sh
if [ $# = 0 ] ; then
echo Usage: $0 file
fi
size_dec=`stat -c "%s" $1`
size_hex_echo_string=`printf "%08x" $size_dec |
sed 's/\(..\)\(..\)\(..\)\(..\)/\\\\x\4\\\\x\3\\\\x\2\\\\x\1/g'`
/bin/echo -ne $size_hex_echo_string