Monolithic Wireguard PKGBUILD that I used for Arch Linux ARM (for the Raspberry Pi 4, which doesn't have a 5.6-based kernel right now)

PKGBUILD

# based on https://github.com/graysky's PKGBUILD
# https://archlinuxarm.org/forum/viewtopic.php?f=15&t=13957
pkgbase=wireguard
pkgname=(wireguard-module wireguard-tools)
pkgver=0.0.20191219
pkgrel=1
_pkgname=WireGuard
pkgdesc='next generation secure network tunnel'
arch=('x86_64' 'aarch64' 'armv7h')
url='http://www.wireguard.com/'
license=('GPL')
makedepends=('libmnl' 'linux-raspberrypi4-headers')
validpgpkeys=('AB9942E6D4A4CFC3412620A749FC7012A5DE03AE')
# for some reason, this wouldn't work for me, so i used makepkg -si --skippgpcheck

source=("https://git.zx2c4.com/WireGuard/snapshot/WireGuard-${pkgver}.tar"{.xz,.asc})

sha256sums=('SKIP')


# look at ls `/usr/lib/modules`
_extramodules=4.19-raspberrypi4

prepare() {
  cd WireGuard-${pkgver}/
  find contrib/examples/ -name '.gitignore' -delete
  # get currently installed KERNELDIR
  export _RIGHTPATH=$(cat /usr/lib/modules/extramodules-$_extramodules/version)
}



build() {
  cd WireGuard-${pkgver}/
  make -C src KERNELDIR="/lib/modules/$_RIGHTPATH/build"
}

package_wireguard-module() {
  provides=('WIREGUARD-MODULE')
  cd "$_pkgname-$pkgver"
  xz src/wireguard.ko
  install -Dm644 src/wireguard.ko.xz "$pkgdir/usr/lib/modules/extramodules-$_extramodules/wireguard.ko.xz"
}

package_wireguard-tools() {
  depends=('libmnl')
  cd WireGuard-${pkgver}/

  make -C src/tools/ \
    DESTDIR="${pkgdir}/" \
    WITH_BASHCOMPLETION=yes \
    WITH_WGQUICK=yes \
    WITH_SYSTEMDUNITS=yes install
}