From 8dfb61dcbaceb19a5ded5e9c9dcf8d05acc32294 Mon Sep 17 00:00:00 2001 From: Denis Efremov Date: Fri, 5 Jun 2020 10:39:55 +0300 Subject: kbuild: add variables for compression tools 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 The use of GZIP in gzip tool is obsolete since 2015.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 Signed-off-by: Masahiro Yamada --- kernel/gen_kheaders.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/gen_kheaders.sh') diff --git a/kernel/gen_kheaders.sh b/kernel/gen_kheaders.sh index e13ca842eb7e..c1510f0ab3ea 100755 --- a/kernel/gen_kheaders.sh +++ b/kernel/gen_kheaders.sh @@ -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 -- cgit v1.2.3-59-g8ed1b