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| author | Denis Efremov <efremov@linux.com> | 2020-06-05 10:39:55 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-03 11:27:10 +0200 |
| commit | 37432a83faab68c0bc89d6a4395ff063eaa14f3b (patch) | |
| tree | 3102d03ff39539ef685b454a87fc0c21e503b74f /arch/ia64 | |
| parent | 47a41f65afb6a14467445a1746b41fcedcbfe064 (diff) | |
kbuild: add variables for compression tools
commit 8dfb61dcbaceb19a5ded5e9c9dcf8d05acc32294 upstream.
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 The use of GZIP in gzip tool is obsolete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>
Signed-off-by: Matthias Maennich <maennich@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/ia64/Makefile b/arch/ia64/Makefile index 32240000dc0c..f817f3d5e758 100644 --- a/arch/ia64/Makefile +++ b/arch/ia64/Makefile @@ -40,7 +40,7 @@ $(error Sorry, you need a newer version of the assember, one that is built from endif quiet_cmd_gzip = GZIP $@ -cmd_gzip = cat $(real-prereqs) | gzip -n -f -9 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)) $< $@ |