Compiled on PI4B4G with 5.10.77-piCore-v8

Reference:
https://github.com/archlinux/svntogit-community/blob/packages/miniupnpc/trunk/PKGBUILD

Compile Flags:
CC='gcc'
CXX='g++'
CPPFLAGS='-DNDEBUG'
CFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto'
CXXFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto'
LDFLAGS='-Wl,-O1 -Wl,-v -fuse-ld=gold -L/usr/local/lib'
export CC CXX CPPFLAGS CFLAGS CXXFLAGS LDFLAGS

AR='gcc-ar'
NM='gcc-nm'
RANLIB='gcc-ranlib'
LD='ld.gold'
export AR NM RANLIB STRIP LD

Dependencies:
compiletc
cmake
python3.8-setuptools
python3.8-dev

Commands:

# fix lto
P=/usr/local/libexec/gcc/aarch64-unknown-linux-gnu/10.2.0/liblto_plugin.so.0.0.0
sudo mkdir -p /usr/local/lib/bfd-plugins
sudo ln -sfv $P /usr/local/lib/bfd-plugins/liblto_plugin.so

wget http://miniupnp.free.fr/files/download.php?file=miniupnpc-2.2.3.tar.gz -O miniupnpc-2.2.3.tar.gz

tar -xf miniupnpc-2.2.3.tar.gz

cd miniupnpc-2.2.3

# main program

# don't use soft links
# ln -s include/* .
cp include/* .

mkdir build && cd build

cmake .. -DCMAKE_BUILD_TYPE='MinSizeRel' \
-DCMAKE_INSTALL_PREFIX='/usr/local' \
-DCMAKE_INSTALL_LIBDIR='lib'

time make -j4
real    0m 8.69s
user    0m 23.73s
sys     0m 6.48s

DESTDIR=/tmp/packing-miniupnpc make install

# python modules

cd .. && pwd   # /tmp/miniupnpc-2.2.3

python3.8 setup.py build -v -j4
python3.8 setup.py install -v --root=/tmp/py --prefix=/usr/local

Packing:

cd /tmp/py
strip --strip-unneeded ./usr/local/lib/python3.8/site-packages/miniupnpc.cpython-38-aarch64-linux-gnu.so

cd /tmp/packing-miniupnpc
llvm-strip --strip-debug ./usr/local/lib/libminiupnpc.a
strip --strip-unneeded ./usr/local/lib/libminiupnpc.so.2.2.3

mkdir -p /tmp/lib/usr/local/lib/
mv ./usr/local/lib/*so* /tmp/lib/usr/local/lib/

# make sure the headers in dev are actual files (not soft links)