wiki.matoken.org

$ wget https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.6.tar.xz https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.6.tar.sign
$ tar tvf ./linux-5.6.tar.xz
$ unxz ./linux-5.6.tar.xz
$ gpg --verify linux-5.6.tar.sign
gpg: assuming signed data in 'linux-5.6.tar'
gpg: Signature made Mon 30 Mar 2020 02:47:36 PM JST
gpg:                using RSA key 647F28654894E3BD457199BE38DBBDC86092693E
gpg: Good signature from "Greg Kroah-Hartman (Linux kernel stable release signing key) <greg@kroah.com>" [undefined]
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
Primary key fingerprint: 647F 2865 4894 E3BD 4571  99BE 38DB BDC8 6092 693E
$ tar xf ./linux-5.6.tar

$ cp /boot/config-`uname -r` ./.config
$ make olddefconfig
$ grep -i wireguard ./.config
# CONFIG_WIREGUARD is not set
$ make xconfig

Screenshot from 2020-03-31 03-49-30.png

$ grep -i wireguard ./.config
CONFIG_WIREGUARD=m
# CONFIG_WIREGUARD_DEBUG is not set

$ time make -j`nproc` deb-pkg

dpkg-checkbuilddeps: error: Unmet build dependencies: libelf-dev:native
dpkg-buildpackage: warning: build dependencies/conflicts unsatisfied; aborting
dpkg-buildpackage: warning: (Use -d flag to override.)
make[1]: *** [scripts/Makefile.package:77: deb-pkg] Error 3
make: *** [Makefile:1417: deb-pkg] Error 2

$ sudo apt install libelf-dev

$ time make -j`nproc` deb-pkg

$ uname -rm
5.4.0-4-amd64 x86_64
$ lsb_release -dr
Description:    Debian GNU/Linux bullseye/sid
Release:        unstable
$ dpkg-query -W linux-*-`uname -r` build-essential
build-essential 12.8
linux-headers-5.4.0-4-amd64     5.4.19-1
linux-image-5.4.0-4-amd64       5.4.19-1
linux-latest-modules-5.4.0-4-amd64

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/ // / / (_ /  _/ /   | |/ |/ /  | |/ / 
\___/  \___/  /___/   |__/|__/   |___/