compile_minimal_regex_boost.sh

#!/bin/bash
# This gist downloads a minimal set of boost libraries just enough to compile the regex library

set -exo pipefail

INSTALL_DIR=/ssd/tmp/install
TMPDIR=/ssd/tmp
TAG=boost-1.78.0

cd $TMPDIR
rm -rf boost
git clone https://github.com/boostorg/boost.git
cd boost
git checkout $TAG

allsm=" tools/build                                                                              
        tools/boost_install
        libs/regex 
        libs/config 
        libs/headers
        libs/throw_exception
        libs/exception
        libs/assert"
for sm in $allsm; do
    git submodule update --init $sm
done


#export LD=/usr/local/bin/ld.lld
#export CC='/usr/local/bin/clang'
#export CXX='/usr/local/bin/clang++'
#export CXXFLAGS='-O3 -stdlib=libc++ -std=c++20 -stdlib=libc++'
#export LDFLAGS="-lc++abi -lc++"

./bootstrap.sh --prefix=$INSTALL_DIR

#--with-toolset=clang
./b2 headers

#bash libs/config/configure
#cp -vf user.hpp libs/config/include/boost/config/user.hpp 
#cp -vf user.hpp boost/config/user.hpp 

./b2 install -q -a \
        --prefix=$INSTALL_DIR \
        --build-type=minimal \
        --layout=system \
        --disable-icu \
        --with-regex \
        variant=release link=static runtime-link=static \
        threading=single address-model=64 architecture=x86 
#        toolset=clang