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Revision as of 00:50, 15 March 2022

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→‎Installing cross compiling toolchain
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[[Category:Development]]
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[[Category:Software]]
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{{Infobox PTTLink
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| image = Raspberry-Pi-3-B.webp
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| caption = Example PTTLink Node
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| category = Development
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}}
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{{ Note|'''This document is a work in progress and is still being updated by the author.''' }}
 
Welcome to the Development section for the AllStarLink/PTTLink system.
 
Welcome to the Development section for the AllStarLink/PTTLink system.
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= Compiling =
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Information related to compiling app_rpt and other various software.
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*[[Compiling]] - Building PTTLink from source
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= Cross compiling =
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Compiling on the Raspberry PI is both extremely slow and an exercise in pain.  Thankfully there are ways to cross compile the software using a standard desktop computer with the Raspberry PI as the target.
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== Installing cross compiling toolchain ==
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Run the following to install a newer cross compiling toolchain from your distro's package tree along with other necessary utilities:
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<syntaxhighlight lang="text">apt-get install -y git bc bison flex rsync libssl-dev make device-tree-compiler libc6-dev libncurses5-dev crossbuild-essential-armhf crossbuild-essential-arm64</syntaxhighlight>
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=== GCC 4.9 ===
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If you intend to cross compile pieces of the Asterisk 1.4 distribution then you will need the GCC 4.9.x compiler.  Linaro has a recent version of the GCC 4.9 compiler that we can use for this.
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*Install latest GCC 4.9.x cross compiler and associated toolset:
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==== 32 bit ====
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<syntaxhighlight lang="text">wget http://releases.linaro.org/components/toolchain/binaries/4.9-2017.01/arm-linux-gnueabihf/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf.tar.xz
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sudo tar xf gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf.tar.xz -C /opt</syntaxhighlight>
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==== 64 bit ====
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<syntaxhighlight lang="text">wget http://releases.linaro.org/components/toolchain/binaries/4.9-2017.01/aarch64-linux-gnu/gcc-linaro-4.9.4-2017.01-x86_64_aarch64-linux-gnu.tar.xz
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sudo tar xf gcc-linaro-4.9.4-2017.01-x86_64_aarch64-linux-gnu.tar.xz -C /opt</syntaxhighlight>
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== Raspberry PI 3 ==
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Note: These instructions will use the 64bit Kernel for the Raspberry PI 3.
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'''Kernel versions'''
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*Replace the 4.19 with the specific version of the Linux kernel you want in the git clone command below.
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You will need to already have a Debian build machine setup to do this.
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=== Configure Debian Build Machine ===
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*Create build directory
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<syntaxhighlight lang="bash">
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mkdir ~/Pi3-Kernel && cd ~/Pi3-Kernel
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</syntaxhighlight>
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*Clone the Raspbverry Pi repository and pre-built binaries (removing the pre-built 32bit Kernel)
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<syntaxhighlight lang="bash">
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git clone --depth=1 -b rpi-4.19.y https://github.com/raspberrypi/linux.git
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svn export https://github.com/raspberrypi/firmware/trunk/boot
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rm boot/kernel*
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rm boot/*.dtb
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rm boot/overlays/*.dtbo
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</syntaxhighlight>
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*Load stock Raspbery Pi 3 configuration
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<syntaxhighlight lang="bash">
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cd linux
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make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bcmrpi3_defconfig
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</syntaxhighlight>
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*Update config using nconfig (if required.  Skip if using stock config)
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<syntaxhighlight lang="bash">
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make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- nconfig
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</syntaxhighlight>
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*Build Kernel with optimizations for the Pi 3 Arm Cortex A53 CPU
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<syntaxhighlight lang="bash">
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ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make -j4 \
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    CXXFLAGS="-march=armv8-a+crypto+crc -mtune=cortex-a53" \
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    CFLAGS="-march=armv8-a+crypto+crc -mtune=cortex-a53" \
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    bindeb-pkg
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cp arch/arm64/boot/Image ../boot/kernel8.img
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cp arch/arm64/boot/dts/overlays/*.dtbo ../boot/overlays/
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cp arch/arm64/boot/dts/broadcom/*.dtb ../boot/
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cd ..
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</syntaxhighlight>
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*Copy new Kernel from build machine and cleanup build folder.
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Note: we are copying the files to a network share mounted under /mnt/pi3dev
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<syntaxhighlight lang="bash">
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sudo cp *.deb /mnt/pi3dev/Pi3-Kernel/
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sudo cp -r boot /mnt/pi3dev/Pi3-Kernel/
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sudo rm ~/Pi3-Kernel/linux*
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sudo rm -r ~/Pi3-Kernel/boot
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</syntaxhighlight>
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=== Update Raspberry Pi 3 ===
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==== Startup configuration ====
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*Create cmdline.txt and config.txt to boot (as required).  Keep a copy in home directory for now
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<syntaxhighlight lang="text">
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echo 'dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait net.ifnames=0' > ~/cmdline.txt
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echo $'kernel=kernel8.img\ngpu_mem=16\narm_64bit=1' > ~/config.txt
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</syntaxhighlight>
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==== Kernel installation ====
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*Remove old Kernel and install the one we compiled from our network share (you'll need to mount it)
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<syntaxhighlight lang="bash">
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sudo cp /mnt/pi3dev/Pi3-Kernel/*.deb /home/pi/
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cd ~/
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mkdir temp && cd temp
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sudo apt purge linux-headers-* linux-image-*
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cd .. && rm -r temp
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sudo rm -r /boot/*
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sudo dpkg -i linux-headers-*.deb linux-image-*.deb linux-libc-*.deb
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sudo cp -r /mnt/pi3dev/Pi3-Kernel/boot/* /boot/
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sudo cp ~/cmdline.txt /boot/
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sudo cp ~/config.txt /boot/
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sudo reboot
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</syntaxhighlight>
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== Raspberry PI 4 ==
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Note: These instructions will use the 64bit Kernel for the Raspberry Pi 4.
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'''Kernel versions'''
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*Replace the 4.19 with the specific version of the Linux kernel you want in the git clone command below.
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*Support for hardware with more than 3GB of RAM is only available in 4.19 and above.
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**A workaround is to add total_mem=3072 to config text when using other Kernel version with the 4GB Pi 4.
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*FKMS 3D driver fixes are only available in version 4.19 of the Kernel
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**3D acceleration does not work and it falls back to software emulation
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You will need to already have a Debian build machine setup to do this.
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=== Configure Debian Build Machine ===
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*Create build directory
 +
<syntaxhighlight lang="bash">
 +
mkdir ~/Pi4-Kernel && cd ~/Pi4-Kernel
 +
</syntaxhighlight>
 +
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*Clone the Raspbverry Pi repository and pre-built binaries (removing the pre-built 32bit Kernel)
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<syntaxhighlight lang="bash">
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git clone --depth=1 -b rpi-4.19.y https://github.com/raspberrypi/linux.git
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svn export https://github.com/raspberrypi/firmware/trunk/boot
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rm boot/kernel*
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rm boot/*.dtb
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rm boot/overlays/*.dtbo
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</syntaxhighlight>
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*Load stock Raspbery Pi 4 configuration
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<syntaxhighlight lang="bash">
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cd linux
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make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bcm2711_defconfig
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</syntaxhighlight>
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*Update config using nconfig (if required.  Skip if using stock config)
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<syntaxhighlight lang="bash">
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make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- nconfig
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</syntaxhighlight>
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*Build Kernel with optimizations for the Pi 4 Arm Cortex A72 CPU
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<syntaxhighlight lang="bash">
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ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make -j4 \
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    CXXFLAGS="-march=armv8-a+crc -mtune=cortex-a72" \
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    CFLAGS="-march=armv8-a+crc -mtune=cortex-a72" \
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    bindeb-pkg
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cp arch/arm64/boot/Image ../boot/kernel8.img
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cp arch/arm64/boot/dts/overlays/*.dtbo ../boot/overlays/
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cp arch/arm64/boot/dts/broadcom/*.dtb ../boot/
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cd ..
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</syntaxhighlight>
 +
 +
*Copy new Kernel from build machine and cleanup build folder.
 +
Note: we are copying the files to a network share mounted under /mnt/pi4dev
 +
<syntaxhighlight lang="bash">
 +
sudo cp *.deb /mnt/pi4dev/Pi4-Kernel/
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sudo cp -r boot /mnt/pi4dev/Pi4-Kernel/
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sudo rm ~/Pi4-Kernel/linux*.deb
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sudo rm -r ~/Pi4-Kernel/boot
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</syntaxhighlight>
 +
 +
=== Update Raspberry Pi 4 ===
 +
==== Startup configuration ====
 +
*Create cmdline.txt and config.txt to boot (as required).  Keep a copy in home directory for now
 +
<syntaxhighlight lang="text">
 +
echo 'dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait net.ifnames=0' > ~/boot/cmdline.txt
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echo $'kernel=kernel8.img\ngpu_mem=512\narm_64bit=1\ndtoverlay=vc4-fkms-v3d' > ~/boot/config.txt
 +
</syntaxhighlight>
 +
 +
==== Kernel installation ====
 +
*Remove old Kernel and install the one we compiled from our network share (you'll need to mount it)
 +
<syntaxhighlight lang="bash">
 +
sudo cp /mnt/pi4dev/Pi4-Kernel/*.deb /home/pi/
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cd ~/
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mkdir temp && cd temp
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sudo apt purge linux-headers-* linux-image-*
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cd .. && rm -r temp
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sudo rm -r /boot/*
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sudo dpkg -i linux-headers-*.deb linux-image-*.deb linux-libc-*.deb
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sudo cp -r /mnt/pi4dev/Pi4-Kernel/boot/* /boot/
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sudo cp ~/boot/cmdline.txt /boot/
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sudo cp ~/boot/config.txt /boot/
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sudo reboot
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</syntaxhighlight>
Retrieved from "http://wiki.pttlink.org/wiki/Special:MobileDiff/12313...12324"

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