How to change the default toolset during build?

[yurivict]

@grafikrobot

The build fails:

warning: No toolsets are configured.
warning: Configuring default toolset "gcc".
warning: If the default is wrong, your build may not work correctly.
warning: Use the "toolset=xxxxx" option to override our guess.
warning: For more configuration options, please consult
warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html
/usr/ports/devel/boost_build/work/build-4.3.0/src/tools/gcc.jam:226: in gcc.init from module gcc
error: toolset gcc initialization:
error: no command provided, default command 'g++' not found
error: initialized from

http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html mentioned above is a broken link.

[grafikrobot]

The defaults are currently "hard-wired" per platform. Hence the only way to tailor is to configure your actual toolset in a user-config.jam or site-config.jam. Although now that clang is becoming more prevalent as a system compiler it's worth revisiting smarter selection of the default.

[stale]

Thank you for your contributions. Main development of B2 has moved to https://github.com/bfgroup/b2
This issue has been automatically marked as "transition" to indicate the potential for needing transition to the new B2 development project.