message: build-macos works with boost 1.75
diff: #!/usr/bin/env bash
  +unset_env_variables() {
  + # The user's build environment might already have pre-set
  + # flags that can interfere with the compilation process
  + echo "unset_env_variables()"
  + unset CPPFLAGS
  + unset BOOST_LIB_PATH
  + unset BOOST_ROOT
  + unset BOOST_LIB_SUFFIX #BOOST_LIB_SUFFIX=-mt
  + unset OPENSSL_ROOT_DIR
  + unset OPENSSL_BIN_PATH
  + unset OPENSSL_INCLUDE_PATH
  + unset OPENSSL_LIB_PATH
  +}
  +unset_env_variables
  +
  +
  LIBRARY_VERSION=`cat ../build.gradle | grep "version '" | awk '{ print $2 }' | sed "s/'//g"`
  LIBRARY_NAME=jlibtorrent
  LIBTORRENT_REVISION=70f1de3f7ec4012aaea420ff150ef0135d397706 # bump version to 1.2.10 (branch:RC_1_2) Sep 3, 2020
  OPENSSL_VERSION="1.1.1g"
  -BOOST_VERSION="74"
  +BOOST_VERSION="75"
  BOOST_MAJOR="1"
  BOOST_MINOR="0"
  SWIG=`pwd`
  @@ -158,6 +174,7 @@ build_openssl() {
  }
  prepare_libtorrent() {
  + echo "prepare_libtorrent started..."
  abort_if_var_unset "SRC" ${SRC}
  abort_if_var_unset "LIBTORRENT_ROOT" ${LIBTORRENT_ROOT}
  abort_if_var_unset "LIBTORRENT_REVISION" ${LIBTORRENT_REVISION}
  @@ -177,6 +194,7 @@ prepare_libtorrent() {
  git submodule update
  make clean
  popd
  + echo "prepare_libtorrent finished."
  }
  build_libraries() {
  @@ -197,6 +215,8 @@ build_libraries() {
  echo ${PATH}
  export OPENSSL_ROOT=${OPENSSL_ROOT}
  export LIBTORRENT_ROOT=${LIBTORRENT_ROOT}
  + export BOOST_ROOT=${BOOST_ROOT}
  + export BOOST_BUILD_PATH=${BOOST_ROOT}
  $run_bjam
  $run_objcopy
  $run_strip
  