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Scripts and automation to build a bootable RuralPipe image for Raspberry Pi 4

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Warning This is work in progress so most of the steps are manual and/or are incomplete.

RuralPipe Image Builder

This project contains the necessary scripts and automation to build a bootable RuralPipe image for Raspberry Pi 4

Building the cross-compiler toolchain

This project uses crosstool-ng as the means of building the cross-compiler toolchain. Due to the fact that RasPiOS (Raspberry Pi OS) is still on libc 2.31, the compiler needs to stay on GCC 10 since as of the time of this writing, later GCC versions fail to compile older libc versions.

Follow the instructions here.

Installing/compiling prerequisites

The RuralPipe Image uses newer versions of Python, DBus and ModemManager than what natively comes with RasPiOS. Because of this, these utilities need to be cross-compiled first. These utilities in turn depend on libraries, which are also quite old on RasPiOS, so these need to be compiled from source as well.

In addition, the PyMM module uses functionality (such as the case statement) which is only present in Python 3.10 and later. These are not readily available on RasPiOS, so they need to be compiled from source as well.

In order to start the cross-compilation environment locally, use the following script which will start a sub-shell with the appropriate environment variables configured.

./x-compile-env.sh armv8-RuralPipe-linux-gnueabihf

PYTHON3 3.11

Some of the RuralPipe's modules use functionality from a later Python so we build version 3.11.

git clone --depth 1 --branch v3.11.1 --single-branch https://github.com/python/cpython.git

Local compile

mkdir build-dev-machine && cd "$_"

../configure -C \
  --prefix=/usr/local \
  --enable-optimizations \
  --with-computed-gotos

make -j11
sudo make install
sudo ldconfig
sudo python3.11 -m pip install --upgrade pip setuptools wheel

Cross-compile

mkdir build-rpi && cd "$_"

echo ac_cv_file__dev_ptmx=yes >> config.site
echo ac_cv_file__dev_ptc=no >> config.site

env \
  CONFIG_SITE=config.site \
  CFLAGS="\
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/arm-linux-gnueabihf \
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/tirpc \
    " \
  LDFLAGS="\
    -L$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -L$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    " \
../configure -C \
  --prefix=/usr/local \
  --with-openssl=$X_COMPILE_SYSROOT_PREFIX/usr --with-openssl-rpath=auto \
  --host=armv8-unknown-linux-gnueabihf --build=aarch64-unknown-linux-gnu \
  --enable-shared \
  --with-system-expat \
  --with-system-ffi \
  --with-build-python=/usr/local/bin/python3.11 \
  --enable-optimizations \
  --with-computed-gotos \
  --disable-ipv6

make -j11

patchelf --add-needed /usr/lib/arm-linux-gnueabihf/libffi.so.7 ./build/lib.linux-arm-3.11/_ctypes.cpython-311-arm-linux-gnueabihf.so
patchelf --add-needed /lib/arm-linux-gnueabihf/libexpat.so.1 ./build/lib.linux-arm-3.11/pyexpat.cpython-311-arm-linux-gnueabihf.so

make install DESTDIR=$X_COMPILE_SYSROOT_PREFIX
make install DESTDIR=$X_COMPILE_STAGING_PREFIX/RPI-python3.11

DBUS 1.14

The dbus library is a prerequisite for the ModemManager service.

git clone --depth 1 --branch dbus-1.14.4 --single-branch https://gitlab.freedesktop.org/dbus/dbus.git

Local compile

TODO

Cross-compile

env \
  CFLAGS="\
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/arm-linux-gnueabihf \
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/tirpc \
    " \
  LDFLAGS="\
    -L$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -L$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath=/usr/local/lib \
    " \
./autogen.sh \
  --prefix=/usr/local \
  --host=armv8-unknown-linux-gnueabihf --build=aarch64-unknown-linux-gnu \
  --enable-shared \
  --disable-Werror \
  --with-system-socket=/run/dbus/system_bus_socket \
  --with-session-socket-dir=/var/run/dbus/system_bus_socket

make -j11
make install DESTDIR=$X_COMPILE_SYSROOT_PREFIX
make install DESTDIR=$X_COMPILE_STAGING_PREFIX/RPI-dbus

LIBGLIB2.0 2.58.3

The Glib library is prerequisite for the ModemManager service.

git clone --depth 1 --branch 2.58.3 --single-branch https://gitlab.gnome.org/GNOME/glib.git

Local compile

TODO

Cross-compile

echo glib_cv_stack_grows=no >> config.site
echo glib_cv_uscore=no >> config.site

env \
  CONFIG_SITE=config.site \
  CFLAGS="\
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/arm-linux-gnueabihf \
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/tirpc \
    " \
  LDFLAGS="\
    -L$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -L$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_BUILD_PREFIX/glib/gmodule/.libs \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath=/usr/local/lib \
    " \
./autogen.sh \
  --prefix=/usr/local \
  --host=armv8-unknown-linux-gnueabihf --build=aarch64-unknown-linux-gnu \
  --enable-shared \
  --with-pcre=internal \
  --with-python=python3

make -j11
make install DESTDIR=$X_COMPILE_SYSROOT_PREFIX
make install DESTDIR=$X_COMPILE_STAGING_PREFIX/RPI-libglib2.0

LIBMBIM-GLIB 1.26.4

git clone --depth 1 --branch 1.26.4 --single-branch https://gitlab.freedesktop.org/mobile-broadband/libmbim.git

Local compile

TODO

Cross-compile

env \
  CFLAGS="\
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/arm-linux-gnueabihf \
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/tirpc \
    " \
  LDFLAGS="\
    -L$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -L$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath=/usr/local/lib \
    " \
./autogen.sh \
  --prefix=/usr/local \
  --host=armv8-unknown-linux-gnueabihf --build=aarch64-unknown-linux-gnu \
  --enable-shared \
  --disable-Werror

make -j11
make install DESTDIR=$X_COMPILE_SYSROOT_PREFIX
make install DESTDIR=$X_COMPILE_STAGING_PREFIX/RPI-libmbim-glib

LibQRTR 1.0.0

git clone --depth 1 --branch 1.0.0 --single-branch https://gitlab.freedesktop.org/mobile-broadband/libqrtr-glib.git

Local compile

TODO

Cross-compile

env \
  CFLAGS="\
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/arm-linux-gnueabihf \
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/tirpc \
    " \
  LDFLAGS="\
    -L$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -L$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath=/usr/local/lib \
    " \
./autogen.sh \
  --prefix=/usr/local \
  --host=armv8-unknown-linux-gnueabihf --build=aarch64-unknown-linux-gnu \
  --enable-shared \
  --disable-Werror

make -j11
make install DESTDIR=$X_COMPILE_SYSROOT_PREFIX
make install DESTDIR=$X_COMPILE_STAGING_PREFIX/RPI-libqrtr-glib

LibQMI 1.30.8

git clone --depth 1 --branch 1.30.8 --single-branch https://gitlab.freedesktop.org/mobile-broadband/libqmi.git

Local compile

TODO

Cross-compile

env \
  CFLAGS="\
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/arm-linux-gnueabihf \
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/tirpc \
    " \
  LDFLAGS="\
    -L$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -L$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath=/usr/local/lib \
    " \
./autogen.sh \
  --prefix=/usr/local \
  --host=armv8-unknown-linux-gnueabihf --build=aarch64-unknown-linux-gnu \
  --enable-shared \
  --disable-Werror

make -j11
make install DESTDIR=$X_COMPILE_SYSROOT_PREFIX
make install DESTDIR=$X_COMPILE_STAGING_PREFIX/RPI-libqmi-glib

ModemManager 1.18

git clone --depth 1 --branch 1.18.12 --single-branch https://gitlab.freedesktop.org/mobile-broadband/ModemManager.git

Local compile

TODO

Cross-compile

git apply ../../patches/ModemManager-1.18.12-glib-bin-pkg-config.patch

env \
  CFLAGS="\
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/arm-linux-gnueabihf \
    -I$X_COMPILE_SYSROOT_PREFIX/usr/include/tirpc \
    " \
  LDFLAGS="\
    -L$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -L$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/lib/arm-linux-gnueabihf \
    -Wl,-rpath-link=$X_COMPILE_SYSROOT_PREFIX/usr/lib/arm-linux-gnueabihf \
    -Wl,-rpath=/usr/local/lib \
    " \
./autogen.sh \
  --prefix=/usr/local \
  --host=armv8-unknown-linux-gnueabihf --build=aarch64-unknown-linux-gnu \
  --enable-shared \
  --disable-Werror

make -j11
make install DESTDIR=$X_COMPILE_STAGING_PREFIX/modemmanager

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Scripts and automation to build a bootable RuralPipe image for Raspberry Pi 4

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