build Python 3.12 on Raspberry Pi

mkpy312

# allow us to kill the SSH-connection while `make`ing
screen

# install dependencies
sudo apt-get -y install build-essential gdb lcov pkg-config \
     libbz2-dev libffi-dev libgdbm-dev libgdbm-compat-dev liblzma-dev \
     libncurses5-dev libreadline-dev libsqlite3-dev libssl-dev \
     lzma lzma-dev tk-dev uuid-dev zlib1g-dev # libmpdec-dev

# using /tmp because it has a lot of room  (approx. 500MB is needed)
cd /tmp

# get the latest version
wget https://www.python.org/ftp/python/3.12.4/Python-3.12.4.tgz
tar -zxvf Python-3.12.4.tgz
cd Python-3.12.4

make clean
# configure with optimizations enabled
./configure --enable-optimizations --with-openssl-rpath=auto
# t=3m

# make using all cores
make -j 4
# t=60m

# install as alternative
sudo make altinstall
# t=3m
python 3.12 --version