commit ecfc1992d3912fe0e09ad29a01df7d4ecbf98bd5
Author: root <root@zeus.fb1.8oceans.net>
Date:   Tue Sep 29 22:50:16 2020 +0200

    Add precompile
    
    Add kernbuild

diff --git a/gentoo/emerge-precompile/README.md b/gentoo/emerge-precompile/README.md
new file mode 100644
index 0000000..37fe4da
--- /dev/null
+++ b/gentoo/emerge-precompile/README.md
@@ -0,0 +1,13 @@
+Based on idea/code from Sven Vermeulen of Gentoo.
+
+Run in nightly crontab to update packages and precompile them to binary
+ebuilds to save time on install.
+
+To use them in emerge use parameter `-k`, e.g. like `emerge -DNvuak --with-bdeps=yes world`
+
+Stuff that makes no sense is exluded like modules and virtual packages.
+
+
+Requires 
+- bash
+- logger
\ No newline at end of file
diff --git a/gentoo/emerge-precompile/emerge-precompile.sh b/gentoo/emerge-precompile/emerge-precompile.sh
new file mode 100755
index 0000000..7b8138c
--- /dev/null
+++ b/gentoo/emerge-precompile/emerge-precompile.sh
@@ -0,0 +1,58 @@
+#!/bin/sh
+# VERSION=2018-01-28.2
+# TODO: Register failed packes to /var/eos/precompile.failed 
+#       and skip on rerun
+#
+
+
+# script based on idea of
+# sven vermeulen http://blog.siphos.be/2013/04/gentoo-protip-using-buildpkgonly/
+
+echo "Start w/ eix-sync" | logger -t precompile
+eix-sync -q
+
+
+
+LIST=$(mktemp);
+
+#emerge -puDN --with-bdeps=y --color=n --columns --quiet=y world | grep "^.*[a-z][a-z][a-z]-.*/[a-z0-9].*" | awk '{print $2}' > ${LIST};
+
+# New: Skip already compiled packages, by excluding result starting with [binary
+# New: Include --binpkg-respect-use=y, should be default in this case, but just to be sure.
+# New: Set PORTAGE_ELOG_SYSTEM-env-var so we won't get per-package-mails from ebuild on systems having sending mails enabled in make.conf
+PORTAGE_ELOG_SYSTEM="save" emerge -puDNk --with-bdeps=y  --changed-deps=y --binpkg-respect-use=y --color=n --quiet=y world | grep  "^\[ebuild " |  sed -nr  's/^\[.+\]\ ([^\ ]+)(\ .*|$)/\1/p'  > ${LIST};
+
+for PACKAGE in $(cat ${LIST});
+do
+	skip=0
+	if [ -f /etc/eos/precompile.exclude ]; then
+		for i in `cat /etc/eos/precompile.exclude | grep -v "^#"`; do
+			if [ "`echo ${PACKAGE} | grep "^${i}" | wc -l`" == "1" ]; then
+				skip=1
+				break;
+			fi
+		done
+	fi				
+	if [ "$skip" == "1" ]; then
+  		echo "Skipping ${PACKAGE} due to /etc/eos/precompile.exclude"
+  		echo "Skipping ${PACKAGE} due to /etc/eos/precompile.exclude" | logger -t precompile
+        else  
+	  printf "Building binary package for ${PACKAGE}... "
+	  emerge -1uN --quiet-build --quiet=y  --changed-deps=y --buildpkgonly =${PACKAGE};
+	  if [[ $? -eq 0 ]];
+	  then
+	    echo "ok";
+	    echo "OK: ${PACKAGE} " | logger -t precompile
+	  else
+	    echo "failed";
+	    echo "FAILED: ${PACKAGE} " | logger -t precompile
+	  fi
+  fi	  
+done
+
+echo "Cleaning distfiles + packages" | logger -t precompile
+eclean packages
+eclean distfiles
+rm $LIST 
+
+echo "Ending" | logger -t precompile
diff --git a/gentoo/kernbuild/README.md b/gentoo/kernbuild/README.md
new file mode 100644
index 0000000..2b90925
--- /dev/null
+++ b/gentoo/kernbuild/README.md
@@ -0,0 +1,22 @@
+
+
+## kernbuild_w_zfs
+
+Builds an prepares a kernel together with an initramfs.
+
+Includes ZFS-modules. Also builds a shiftfs-module (for LXD, not for use with overlayfs!)
+
+Requires:
+- genkernel
+- linux-source
+
+Parameters:
+- Suffix for your kernel e.g. turing1 (adds -turing1 to final kernel version instead of x86_64)
+
+Howto:
+- emerge gentoo-source
+- check link /usr/src/linux to new source is OK
+- make menuconfig
+- Run script
+- In boot check existances of new kernels
+- Add to bootloader
diff --git a/gentoo/kernbuild/kernbuild_w_zfs b/gentoo/kernbuild/kernbuild_w_zfs
new file mode 100755
index 0000000..1568f90
--- /dev/null
+++ b/gentoo/kernbuild/kernbuild_w_zfs
@@ -0,0 +1,90 @@
+#!/bin/sh
+
+
+LOCALVERSION="-x86_64"
+
+
+if [ "$1" != "" ]; then
+	LOCALVERSION="-eo${1}"
+fi
+
+
+echo "Going after kernel with localversion ${LOCALVERSION}"
+
+sleep 2
+
+PARAM="--no-clean --no-save-config --no-clean --mountboot \
+        --no-lvm \
+        --busybox \
+        --mdadm \
+        --no-iscsi \
+        --e2fsprogs \
+        --disklabel \
+        --hyperv \
+        --virtio \
+        --zfs \
+        --install \
+        --microcode \
+        --kernel-localversion=${LOCALVERSION}
+"
+
+genkernel $PARAM all || exit 1
+emerge @module-rebuild || exit 1
+genkernel $PARAM initramfs || exit 1
+
+########### ShiftFS
+
+
+echo "Now rebuilding shiftfs"
+
+S=`dirname $0`
+T="/usr/src/shiftfs"
+mkdir -p $T
+
+echo "LOCALVERSION=${LOCALVERSION}" > $T/Makefile
+
+cat >>$T/Makefile <<'EOF' 
+
+modname := shiftfs
+obj-m := $(modname).o
+
+KVERSION := $(shell readlink /usr/src/linux | tr -d '/' | cut -b 7- )
+KDIR := /lib/modules/$(KVERSION)$(LOCALVERSION)
+PWD := "$$(pwd)"
+
+ifdef DEBUG
+CFLAGS_$(obj-m) := -DDEBUG
+endif
+
+EXTRA_CFLAGS := -DSHIFTFS_MAGIC=0x6a656a62
+
+default:
+	$(MAKE) -C $(KDIR)/build M=$(PWD) EXTRA_CFLAGS="${EXTRA_CFLAGS}" modules
+
+clean:
+	$(MAKE) O=$(PWD) -C $(KDIR)/build M=$(PWD) clean
+
+load:
+	-rmmod $(modname)
+	insmod $(modname).ko
+
+install:
+	install -m 0755 -o root -g root -d $(KDIR)/extra/fs
+	install -m 0755 -o root -g root $(modname).ko $(KDIR)/extra/fs/
+	depmod -a $(KVERSION)$(LOCALVERSION)
+
+uninstall:
+	rm $(KDIR)/extra/fs/$(modname).ko
+	depmod -a $(KVERSION)$(LOCALVERSION)
+
+
+EOF
+
+
+
+#cp ${S}/Makefile.shiftfs $T/Makefile || exit 1
+mv -f $T/shiftfs.c $T/shiftfs.c.bak 2> /dev/null
+wget -O $T/shiftfs.c  https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/plain/fs/shiftfs.c
+make -C $T clean && make -C $T && make -C $T install || exit 1
+
+echo Complete with success