c++ - How to install Modular Boost? -


because need test experimental features of boost, install boost modular boost repository.

i followed instructions on https://svn.boost.org/trac/boost/wiki/trymodboost , b2 command failed:

./b2 headers /home/wichtounet/src/modular-boost/tools/build/src/build/feature.jam:493: in feature.validate-value-string module feature error: "none" not known value of feature <optimization> error: legal values: "off" "speed" "space" /home/wichtounet/src/modular-boost/tools/build/src/build/property.jam:273: in validate1 module property /home/wichtounet/src/modular-boost/tools/build/src/build/property.jam:299: in property.validate module property /home/wichtounet/src/modular-boost/tools/build/src/tools/builtin.jam:377: in variant module builtin /usr/share/boost-build/site-config.jam:9: in modules.load module site-config /home/wichtounet/src/modular-boost/tools/build/src/build-system.jam:249: in load-config module build-system /home/wichtounet/src/modular-boost/tools/build/src/build-system.jam:351: in load-configuration-files module build-system /home/wichtounet/src/modular-boost/tools/build/src/build-system.jam:524: in load module build-system /home/wichtounet/src/modular-boost/tools/build/src/kernel/modules.jam:289: in import module modules /home/wichtounet/src/modular-boost/tools/build/src/kernel/bootstrap.jam:139: in boost-build module /home/wichtounet/src/modular-boost/boost-build.jam:17: in module scope module

i tried adding optimization=speed on command line, didn't changed thing. tried master , develop branches. tried clang , gcc toolset.

does has idea how install modular boost ?

is there configuration necessary (and where) ? or there procedure follow ?

edit: seems comes /usr/share/boost-build/site-config.jam file installed gentoo. need able tell b2 ignore file.

i turned out caused gentoo configuration file. had ignore file with: 

./b2 --ignore-site-config

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