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kbuild: add variables for compression tools

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Allow user to use alternative implementations of compression tools,
such as pigz, pbzip2, pxz. For example, multi-threaded tools to
speed up the build:
$ make GZIP=pigz BZIP2=pbzip2

Variables _GZIP, _BZIP2, _LZOP are used internally because original env
vars are reserved by the tools. The use of GZIP in gzip tool is obsolete
since 2015. However, alternative implementations (e.g., pigz) still rely
on it. BZIP2, BZIP, LZOP vars are not obsolescent.

The credit goes to @grsecurity.

As a sidenote, for multi-threaded lzma, xz compression one can use:
$ export XZ_OPT="--threads=0"

Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Denis Efremov 2020-06-05 10:39:55 +03:00 committed by Masahiro Yamada
parent e0b250b57d
commit 8dfb61dcba
10 changed files with 45 additions and 24 deletions
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25
Makefile
View File

@ -458,6 +458,26 @@ PYTHON = python
PYTHON3 = python3
CHECK = sparse
BASH = bash
GZIP = gzip
BZIP2 = bzip2
LZOP = lzop
LZMA = lzma
LZ4 = lz4c
XZ = xz
# GZIP, BZIP2, LZOP env vars are used by the tools. Support them as the command
# line interface, but use _GZIP, _BZIP2, _LZOP internally.
_GZIP := $(GZIP)
_BZIP2 := $(BZIP2)
_LZOP := $(LZOP)
# Reset GZIP, BZIP2, LZOP in this Makefile
override GZIP=
override BZIP2=
override LZOP=
# Reset GZIP, BZIP2, LZOP in recursive invocations
MAKEOVERRIDES += GZIP= BZIP2= LZOP=
CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
-Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
@ -506,6 +526,7 @@ CLANG_FLAGS :=
export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
export _GZIP _BZIP2 _LZOP LZMA LZ4 XZ
export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
@ -1020,10 +1041,10 @@ export mod_strip_cmd
mod_compress_cmd = true
ifdef CONFIG_MODULE_COMPRESS
ifdef CONFIG_MODULE_COMPRESS_GZIP
mod_compress_cmd = gzip -n -f
mod_compress_cmd = $(_GZIP) -n -f
endif # CONFIG_MODULE_COMPRESS_GZIP
ifdef CONFIG_MODULE_COMPRESS_XZ
mod_compress_cmd = xz -f
mod_compress_cmd = $(XZ) -f
endif # CONFIG_MODULE_COMPRESS_XZ
endif # CONFIG_MODULE_COMPRESS
export mod_compress_cmd

2
arch/arm/boot/deflate_xip_data.sh
View File

@ -56,7 +56,7 @@ trap 'rm -f "$XIPIMAGE.tmp"; exit 1' 1 2 3
# substitute the data section by a compressed version
$DD if="$XIPIMAGE" count=$data_start iflag=count_bytes of="$XIPIMAGE.tmp"
$DD if="$XIPIMAGE" skip=$data_start iflag=skip_bytes |
gzip -9 >> "$XIPIMAGE.tmp"
$_GZIP -9 >> "$XIPIMAGE.tmp"
# replace kernel binary
mv -f "$XIPIMAGE.tmp" "$XIPIMAGE"

2
arch/ia64/Makefile
View File

@ -40,7 +40,7 @@ $(error Sorry, you need a newer version of the assember, one that is built from
endif
quiet_cmd_gzip = GZIP $@
cmd_gzip = cat $(real-prereqs) | gzip -n -f -9 > $@
cmd_gzip = cat $(real-prereqs) | $(_GZIP) -n -f -9 > $@
quiet_cmd_objcopy = OBJCOPY $@
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@

8
arch/m68k/Makefile
View File

@ -135,10 +135,10 @@ vmlinux.gz: vmlinux
ifndef CONFIG_KGDB
cp vmlinux vmlinux.tmp
$(STRIP) vmlinux.tmp
gzip -9c vmlinux.tmp >vmlinux.gz
$(_GZIP) -9c vmlinux.tmp >vmlinux.gz
rm vmlinux.tmp
else
gzip -9c vmlinux >vmlinux.gz
$(_GZIP) -9c vmlinux >vmlinux.gz
endif
bzImage: vmlinux.bz2
@ -148,10 +148,10 @@ vmlinux.bz2: vmlinux
ifndef CONFIG_KGDB
cp vmlinux vmlinux.tmp
$(STRIP) vmlinux.tmp
bzip2 -1c vmlinux.tmp >vmlinux.bz2
$(_BZIP2) -1c vmlinux.tmp >vmlinux.bz2
rm vmlinux.tmp
else
bzip2 -1c vmlinux >vmlinux.bz2
$(_BZIP2) -1c vmlinux >vmlinux.bz2
endif
archclean:

2
arch/parisc/Makefile
View File

@ -162,7 +162,7 @@ vmlinuz: bzImage
$(OBJCOPY) $(boot)/bzImage $@
else
vmlinuz: vmlinux
@gzip -cf -9 $< > $@
@$(_GZIP) -cf -9 $< > $@
endif
install:

2
kernel/gen_kheaders.sh
View File

@ -88,7 +88,7 @@ find $cpio_dir -type f -print0 |
find $cpio_dir -printf "./%P\n" | LC_ALL=C sort | \
tar "${KBUILD_BUILD_TIMESTAMP:+--mtime=$KBUILD_BUILD_TIMESTAMP}" \
--owner=0 --group=0 --numeric-owner --no-recursion \
-Jcf $tarfile -C $cpio_dir/ -T - > /dev/null
-I $XZ -cf $tarfile -C $cpio_dir/ -T - > /dev/null
echo $headers_md5 > kernel/kheaders.md5
echo "$this_file_md5" >> kernel/kheaders.md5

12
scripts/Makefile.lib
View File

@ -244,7 +244,7 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
# ---------------------------------------------------------------------------
quiet_cmd_gzip = GZIP $@
cmd_gzip = cat $(real-prereqs) | gzip -n -f -9 > $@
cmd_gzip = cat $(real-prereqs) | $(_GZIP) -n -f -9 > $@
# DTC
# ---------------------------------------------------------------------------
@ -337,19 +337,19 @@ printf "%08x\n" $$dec_size | \
)
quiet_cmd_bzip2 = BZIP2 $@
cmd_bzip2 = { cat $(real-prereqs) | bzip2 -9; $(size_append); } > $@
cmd_bzip2 = { cat $(real-prereqs) | $(_BZIP2) -9; $(size_append); } > $@
# Lzma
# ---------------------------------------------------------------------------
quiet_cmd_lzma = LZMA $@
cmd_lzma = { cat $(real-prereqs) | lzma -9; $(size_append); } > $@
cmd_lzma = { cat $(real-prereqs) | $(LZMA) -9; $(size_append); } > $@
quiet_cmd_lzo = LZO $@
cmd_lzo = { cat $(real-prereqs) | lzop -9; $(size_append); } > $@
cmd_lzo = { cat $(real-prereqs) | $(_LZOP) -9; $(size_append); } > $@
quiet_cmd_lz4 = LZ4 $@
cmd_lz4 = { cat $(real-prereqs) | lz4c -l -c1 stdin stdout; \
cmd_lz4 = { cat $(real-prereqs) | $(LZ4) -l -c1 stdin stdout; \
$(size_append); } > $@
# U-Boot mkimage
@ -396,7 +396,7 @@ quiet_cmd_xzkern = XZKERN $@
$(size_append); } > $@
quiet_cmd_xzmisc = XZMISC $@
cmd_xzmisc = cat $(real-prereqs) | xz --check=crc32 --lzma2=dict=1MiB > $@
cmd_xzmisc = cat $(real-prereqs) | $(XZ) --check=crc32 --lzma2=dict=1MiB > $@
# ASM offsets
# ---------------------------------------------------------------------------

8
scripts/Makefile.package
View File

@ -45,7 +45,7 @@ if test "$(objtree)" != "$(srctree)"; then \
false; \
fi ; \
$(srctree)/scripts/setlocalversion --save-scmversion; \
tar -cz $(RCS_TAR_IGNORE) -f $(2).tar.gz \
tar -I $(_GZIP) -c $(RCS_TAR_IGNORE) -f $(2).tar.gz \
--transform 's:^:$(2)/:S' $(TAR_CONTENT) $(3); \
rm -f $(objtree)/.scmversion
@ -127,9 +127,9 @@ util/PERF-VERSION-GEN $(CURDIR)/$(perf-tar)/); \
tar rf $(perf-tar).tar $(perf-tar)/HEAD $(perf-tar)/PERF-VERSION-FILE; \
rm -r $(perf-tar); \
$(if $(findstring tar-src,$@),, \
$(if $(findstring bz2,$@),bzip2, \
$(if $(findstring gz,$@),gzip, \
$(if $(findstring xz,$@),xz, \
$(if $(findstring bz2,$@),$(_BZIP2), \
$(if $(findstring gz,$@),$(_GZIP), \
$(if $(findstring xz,$@),$(XZ), \
$(error unknown target $@)))) \
-f -9 $(perf-tar).tar)

6
scripts/package/buildtar
View File

@ -28,15 +28,15 @@ case "${1}" in
opts=
;;
targz-pkg)
opts=--gzip
opts="-I ${_GZIP}"
tarball=${tarball}.gz
;;
tarbz2-pkg)
opts=--bzip2
opts="-I ${_BZIP2}"
tarball=${tarball}.bz2
;;
tarxz-pkg)
opts=--xz
opts="-I ${XZ}"
tarball=${tarball}.xz
;;
*)

2
scripts/xz_wrap.sh
View File

@ -20,4 +20,4 @@ case $SRCARCH in
sparc) BCJ=--sparc ;;
esac
exec xz --check=crc32 $BCJ --lzma2=$LZMA2OPTS,dict=32MiB
exec $XZ --check=crc32 $BCJ --lzma2=$LZMA2OPTS,dict=32MiB