compiled on RPI4B-4G with 5.10.77-piCore-v8

Compile Flags:
CFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto -fuse-linker-plugin -fno-exceptions'
CXXFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto -fuse-linker-plugin -fno-exceptions -fno-rtti'
LDFLAGS='-Wl,-O1'

Dependencies:
compiletc
coreutils
procps-ng
python3.8-dev
gtk3-dev

# I use copy mode for this particular build
# tce-load -ci deps...

Commands:

tar xf distcc-3.4.tar.gz

cd distcc-3.4

./configure --prefix=/usr/local --without-libiberty 

time make -j4
real    0m 17.39s
user    0m 47.03s
sys     0m 8.63s

======================================================

Run some checks:

# require coreutils.tcz and procps-ng.tcz

time make check
real    3m 36.39s
user    0m 36.88s
sys     0m 19.73s

sudo make install

# add . to PATH

export PATH=".:$PATH"

# add user temporarily for installcheck

sudo adduser -DH distcc

time make installcheck
real    3m 21.65s
user    0m 23.87s
sys     0m 16.88s

======================================================

Packing:

make DESTDIR=/tmp/dcc install

# gnome monitor
mkdir -p /tmp/mon/usr/local/share /tmp/mon/usr/local/bin
mv /tmp/dcc/usr/local/share/*i* /tmp/mon/usr/local/share
mv /tmp/dcc/usr/local/bin/distccmon-gnome /tmp/mon/usr/local/bin
echo X-FullPathIcon=/usr/local/share/pixmaps/distccmon-gnome.png >> \
/tmp/mon/usr/local/share/applications/distccmon-gnome.desktop

# MASQUERADING
# https://www.freebsd.org/cgi/man.cgi?distcc#MASQUERADING
# remove this useless file
rm -f /tmp/dcc/usr/local/sbin/update-distcc-symlinks
rmdir /tmp/dcc/usr/local/sbin

# add symbolic links (better be relative)
mkdir -p /tmp/dcc/usr/lib/distcc
cd /tmp/dcc/usr/lib/distcc
for C in aarch64-unknown-linux-gnu-c++  aarch64-unknown-linux-gnu-g++  c++  cc  g++  gcc; do
  ln -s ../../local/bin/distcc $C
done
mkdir -p /tmp/dcc/usr/lib/distcc
cd /tmp/dcc/usr/local/lib/distcc
for C in aarch64-unknown-linux-gnu-c++  aarch64-unknown-linux-gnu-g++  c++  cc  g++  gcc; do
  ln -s ../../bin/distcc $C
done

# tce.installed ============================================================================
#!/bin/sh

# reset path just in case
export PATH=/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin

# create log file
touch /var/log/distccd.log
chmod 666 /var/log/distccd.log

# gfortran
if [ -f /usr/local/tce.installed/gfortran ]; then
  cd /usr/lib/distcc
  ln -sf ../../local/bin/distcc gfortran
  ln -sf ../../local/bin/distcc aarch64-unknown-linux-gnu-gfortran
  cd /usr/local/lib/distcc
  ln -sf ../../bin/distcc gfortran
  ln -sf ../../bin/distcc aarch64-unknown-linux-gnu-gfortran
fi

# clang
if [ -f /usr/local/tce.installed/clang ]; then
  cd /usr/lib/distcc
  ln -sf ../../local/bin/distcc clang
  ln -sf ../../local/bin/distcc clang++
  cd /usr/local/lib/distcc
  ln -sf ../../bin/distcc clang
  ln -sf ../../bin/distcc clang++
fi

# daemon and custom commands
# export compile flags and start the daemon
TCUSER=$(cat /etc/sysconfig/tcuser)
if [ -f /home/${TCUSER}/.distcc/tc.sh ]; then
  . /home/${TCUSER}/.distcc/tc.sh
else
  # default compile flags
  CFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe'
  CXXFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe'
  LDFLAGS='-Wl,-O1'
  export CFLAGS CXXFLAGS LDFLAGS
  # start the daemon
  # --allow-private doesn't work
  # assign them manually
  distccd --daemon --user $TCUSER \
  --allow 192.168.0.0/16 \
  --allow 172.16.0.0/12 \
  --allow 10.0.0.0/8 \
  --allow 127.0.0.0/8 \
  --verbose --log-file=/var/log/distccd.log
fi