Hello I am trying to build boost from git clone I run bootstrap.sh with these flags ```shell ./bootstrap.sh \ --prefix=/usr/local \ --with-toolset=clang \ --with-icu=/usr/local \ --with-python=python27 \ ``` After boostrapping I append ```shell "using mpi ;" >> ./project-config.jam ``` There's two issues with that 1)icu isn't found even though icu headers are in /usr/local/unicode/ 2)I get this this warning ```error warning: non-free usage requirements <threading>multi ignored warning: in main-target boost_mpi_python at libs/mpi/build/Jamfile.v2:144 ``` Which I tracked down to this issue: http://boost.2283326.n4.nabble.com/explicitly-specified-values-of-non-free-f... That thread leaves the issue unresolved and just throws a warning instead of failing. ```shell ./bjam \ --prefix=/usr/local \ --layout=system \ -d4 \ --toolset=clang \ --build-dir=./build \ --stagedir=/opt/boost \ -j4 \ include=/usr/local/include/unicode \ link=shared \ threading=multi \ stage \ ``` bjam output ```shell Performing configuration checks - default address-model : 64-bit - default architecture : x86 - symlinks supported : yes - C++11 mutex : yes - lockfree boost::atomic_flag : no - Boost.Config Feature Check: cxx11_auto_declarations : yes - Boost.Config Feature Check: cxx11_constexpr : yes - Boost.Config Feature Check: cxx11_defaulted_functions : yes - Boost.Config Feature Check: cxx11_final : yes - Boost.Config Feature Check: cxx11_hdr_mutex : yes - Boost.Config Feature Check: cxx11_hdr_tuple : yes - Boost.Config Feature Check: cxx11_lambdas : yes - Boost.Config Feature Check: cxx11_noexcept : yes - Boost.Config Feature Check: cxx11_nullptr : yes - Boost.Config Feature Check: cxx11_rvalue_references : yes - Boost.Config Feature Check: cxx11_template_aliases : yes - Boost.Config Feature Check: cxx11_thread_local : yes - Boost.Config Feature Check: cxx11_variadic_templates : yes - has_icu builds : yes warning: non-free usage requirements <threading>multi ignored warning: in main-target mpi at project-config.jam:42 warning: non-free usage requirements <threading>multi ignored warning: in main-target boost_mpi at libs/mpi/build/Jamfile.v2:119 - zlib : yes - bzip2 : yes - lzma : yes - zstd : no - iconv (libc) : yes - icu : no - icu (lib64) : no - xlocale supported : yes - native-atomic-int32-supported : yes - native-syslog-supported : yes - pthread-supports-robust-mutexes : yes - compiler-supports-ssse3 : yes - compiler-supports-avx2 : yes - gcc visibility : yes - long double support : no warning: non-free usage requirements <threading>multi ignored warning: in main-target boost_mpi_python at libs/mpi/build/Jamfile.v2:144 - libbacktrace builds : no - addr2line builds : yes - WinDbg builds : no - WinDbgCached builds : no - BOOST_COMP_GNUC >= 4.3.0 : no Component configuration: - atomic : building - chrono : building - container : building - context : building - contract : building - coroutine : building - date_time : building - exception : building - fiber : building - filesystem : building - graph : building - graph_parallel : building - iostreams : building - locale : building - log : building - math : building - mpi : building - program_options : building - python : building - random : building - regex : building - serialization : building - stacktrace : building - system : building - test : building - thread : building - timer : building - type_erasure : building - wave : building ``` I do have a working installation of openmpi installed in /usr/local and mpicxx is in my path from following the directions here: https://www.boost.org/doc/libs/1_64_0/doc/html/mpi/getting_started.html#mpi.... in the end the build errors out ```shell 0.003049 sec system; 0.000000 sec user; 3.078255 sec clock Using shell: /bin/sh -c argv[0] = '/bin/sh' argv[1] = '-c' argv[2] = ' ln -f -s 'libboost_wave.so.1.69.0' '/wrkdirs/usr/ports/devel/boost-devel/work/stage/lib/libboost_wave.so' ' ln-UNIX /wrkdirs/usr/ports/devel/boost-devel/work/stage/lib/libboost_wave.so ln -f -s 'libboost_wave.so.1.69.0' '/wrkdirs/usr/ports/devel/boost-devel/work/stage/lib/libboost_wave.so' 0.001905 sec system; 0.000000 sec user; 1.957884 sec clock ...failed updating 86 targets... ...skipped 17 targets... ...updated 1147 targets... *** [do-build] Error code 1 make: stopped in /usr/ports/devel/boost-devel 1 error ``` two questions: 1) How do I solve the non-free usage requirements warning 2) Why isn't icu being picked up? github issue:: https://github.com/boostorg/boost/issues/210