Compiled on X8DTU with 2 physical Intel Xeon E5530 CPU (8C16T)

Compile Flags:
CFLAGS='-mtune=generic -Os -pipe'
CXXFLAGS='-mtune=generic -Os -pipe'
LDFLAGS='-Wl,-O1'
export CFLAGS CXXFLAGS LDFLAGS

Dependencies:
compiletc
python3.9-dev
icu70-dev
zstd-dev

Commands:

./bootstrap.sh --prefix=/usr/local --with-python=python3.9
real    0m 33.10s
user    0m 29.46s
sys     0m 2.93s

time ./b2 stage threading=multi link=shared
...updated 1042 targets...
real    2m 46.61s
user    32m 9.24s
sys     1m 19.32s

touch /tmp/TimeMark

time find -exec touch {} ';'
real    1m 51.35s
user    1m 7.18s
sys     0m 40.37s

sudo time ./b2 install threading=multi link=shared
...updated 17126 targets...
real    3m 15.18s
user    33m 16.16s
sys     1m 27.75s

find /usr/local/ -newer /tmp/TimeMark -not -type d > /tmp/full.list
grep '/usr/local/lib/.*\.so.*' full.list | tar -T - -cf lib.tar

mkdir packing-boost
tar -xf lib.tar -C packing-boost
findELF() {
  # files in ELF format
  busybox find "$1" -type f \
  -exec busybox head -c4 {} ';' \
  -print | busybox awk '/^\x7fELF/{print(substr($0,5))}'
}
strip --strip-unneeded $(findELF packing-boost)

# dev
grep -v '/usr/local/lib/.*\.so.*' full.list | grep -v '__pycache__' | tar -T - -cf dev.tar
mkdir packing-boost-dev
tar -xf dev.tar -C packing-boost-dev
strip --strip-debug packing-boost-dev/usr/local/lib/*.a