Building the r8168 driver for RealTek RTL8168B/8111B, RTL8168C/8111C, RTL8168CP/8111CP, RTL8168D/8111D, DP/8111DP, and RTL8168E/8111E Gigabit Ethernet controllers with PCI-Express interface.

v. 8.056.02

* Official download page:
   https://www.realtek.com/Download/List?cate_id=584

# Note: the following instructions are for building in Tiny Core. To avoid the large kernel source download on my home
# internet this time I compiled on a VPS using a similar process and GCC version 12.2.0.

* cd /tmp
mirror=`cat /opt/tcemirror`
* kerver=`uname -r` && wget ${mirror}`version -m`.x/`uname -m`/release/src/kernel/linux-${kerver%-*}-patched.tar.xz
  (~150MB download)
* tce-load -i compiletc squashfs-tools submitqc gettext bc elfutils-dev
* kerver=`uname -r` && tar xJf /tmp/linux-${kerver%-*}-patched.tar.xz
* cd linux-${kerver%-*}
* sudo ln -s "`pwd`" /lib/modules/`uname -r`/build
* wget -O .config ${mirror}`version -m`.x/`uname -m`/release/src/kernel/config-${kerver%-*}-tinycore64
* wget ${mirror}`version -m`.x/`uname -m`/release/src/kernel/Module.symvers
* export CFLAGS="-mtune=generic -Os -pipe" CXXFLAGS="-mtune=generic -Os -pipe" LDFLAGS="-Wl,-O1"
* make oldconfig && make prepare && make modules_prepare

* Unpack driver source archive somewhere
(on VPS edit src/Makefile to change "uname -r" calls to TC kernel version at "BASEDIR := " and "KVER = ")
* Enter driver source directory and run: make modules
* cd src
* r8168.ko is the kernel module
* strip module debugging symbols with: strip --strip-unneeded r8168.ko
* gzip -9 r8168.ko

#config (manual):

* Add "blacklist=r8169" bootcode to bootloader parameters list to prevent the Linux kernel driver from automatically loading at boot.
* Add "modprobe r8168" command to /opt/bootlocal.sh

#Making an extension:

* mkdir -p r8168/usr/local/lib/modules/`uname -r`/kernel/drivers/net/ethernet/realtek
* cp r8168.ko.gz r8168/usr/local/lib/modules/`uname -r`/kernel/drivers/net/ethernet/realtek/
* sudo chown -R root:root r8168
* mksquashfs r8168 r8168-`uname -r`.tcz
* md5sum r8168-`uname -r`.tcz > r8168-`uname -r`.tcz.md5.txt
* submitqc